CN104349405A - Data transmission method, communication node and base station - Google Patents

Abstract

Embodiments of the present invention provide a data transmission method, a communication node, and a base station. The method includes: when the second node exchanges data with the first UE through the first link and the first UE needs to be handed over from the source base station to the target base station, the first node determines m second UEs and m second UEs The n first base stations to which it belongs, the first link is a link established between the second node through the source base station and the first UE, m and n are both positive integers; the first node respectively sends n first base stations, m The second UE and the second node notify the establishment of m second links, so that the second node establishes m second links through n first base stations, m second UEs and the first UE, and respectively through The m second links exchange data with the first UE. The embodiments of the present invention can ensure uninterrupted data transmission during UE handover from a source base station to a target base station, thereby improving user experience.

Description

Method for transmitting data, communication node and base station

technical field

The present invention relates to the field of communication, and in particular, to a method for transmitting data, a communication node and a base station.

Background technique

A cellular network is usually divided into multiple cells, and user equipment (User Equipment, UE) is managed by a base station assigned to the cell. When the UE crosses the boundary of one cell and enters another cell, it needs to switch from the source base station of the cell to the target base station of the target cell to ensure uninterrupted communication.

Specifically, during the handover process, the UE first needs to release the radio resource control (Radio Resource Control, RRC) connection with the source base station, then search for the signal of the target base station, and perform operations such as synchronization and access. When the RRC connection between the UE and the source base station is severed but the RRC connection with the target base station has not been established, the data transmission between the UE and the source base station and the target base station is stopped.

This interruption of data transmission will seriously affect the user experience during cell handover, which is contrary to the seamless and robust transmission requirements pursued by future mobile communications.

Contents of the invention

Embodiments of the present invention provide a data transmission method, a communication node, and a base station, which can ensure uninterrupted data transmission during UE handover from a source base station to a target base station.

In a first aspect, a method for transmitting data is provided, including: a first node exchanges data with a first UE through a first link by a first node and the first UE needs to be handed over from a source base station to a target base station , determining m second UEs and n first base stations to which the m second UEs belong, the first link is established between the second node and the first UE through the source base station Links, where m and n are both positive integers; the first node notifies the n first base stations, the m second UEs, and the second node to establish m second links, so that the The second node establishes m second links between the n first base stations, the m second UEs, and the first UE, and communicates with the m second links respectively through the m second links. The first UE exchanges data.

With reference to the first aspect, in a first possible implementation manner, the m second links are respectively composed of the m first sub-links between the second node and the n first base stations, the m second sublinks between the n first base stations and the m second UEs and m third sublinks between the m second UEs and the first UE, The m first sub-links, the m second sub-links and the m third sub-links are in one-to-one correspondence.

With reference to the first aspect or the first possible implementation of the first aspect, in a second possible implementation, the determining the m second UEs and the n first base stations to which the m second UEs belong , including: the first node acquires the basic information of the first UE, and acquires capability information of each of the k first base stations and capability information of each of the p second UEs, k is a positive integer greater than or equal to n, p is a positive integer greater than or equal to m; the first node according to the basic information of the first UE, the capability of each first base station in the k first base stations information and capability information of each of the p second UEs, select m second UEs from the p second UEs, and select the m second UEs from the k first base stations The n first base stations to which the second UE belongs, wherein the k first base stations serve the p second UEs, and the k first base stations and the p second UEs are served by the first Node control, the basic information of the first UE is used to indicate the data bearing capability of the first UE and the direct communication capability supported by the first UE with other UEs, and the k first base stations The capability information of each first base station in the p second UEs is used to indicate the data bearing capability of each first base station, and the capability information of each second UE in the p second UEs is used to indicate that each second UE Bearing capacity for services other than its own.

With reference to the second possible implementation manner of the first aspect, in a third possible implementation manner, the method further includes: the first node determines, according to the capability information of each second UE in the m second UEs, The data carrying ratio of each second link in the m second links; the first node sends first indication information to the second node and the n first base stations respectively, wherein the first The indication information is used to indicate the data bearing ratio of each second link.

With reference to the second possible implementation manner or the third possible implementation manner of the first aspect, in a fourth possible implementation manner, in the acquiring the capability information of each of the k first base stations and Before the capability information of each second UE in the p second UEs, it includes: the first node sends a first capability polling message to the k first base stations respectively, and sends a first capability polling message to the p second UEs respectively sending a second capability polling message, where the first capability polling message is used to indicate reporting of the capability information of the first base station, and the second capability polling message is used to indicate reporting of the capability information of the second UE;

The acquiring the capability information of each of the k first base stations among the k first base stations and the capability information of each of the p second UEs includes: the first node receiving the k capability information of each first base station in the p number of base stations, and receive capability information of each second UE in the p number of second UEs.

With reference to any implementation manner of the second possible implementation manner to the fourth possible implementation manner of the first aspect, in a fifth possible implementation manner, the capability information of each first base station includes at least one of the following Types: current load, remaining resources; the capability information of each second UE includes: whether it has the ability to perform direct communication with other UEs, supported direct communication modes with other UEs, direct communication parameter configuration and UE identification.

With reference to any implementation manner of the second possible implementation manner to the fifth possible implementation manner of the first aspect, in a sixth possible implementation manner, the first node obtains the basic information of the first UE , including: the first node acquires basic information of the first UE from the source base station.

With reference to any one of the first possible implementation manner to the sixth possible implementation manner of the first aspect, in a seventh possible implementation manner, the basic information of the first UE includes the first UE Basic information of data transmission and direct communication information of the first UE, where the direct communication information includes a mode supported by the first UE for direct communication with other UEs.

In combination with the first aspect or any implementation manner of the first possible implementation manner to the seventh possible implementation manner of the first aspect, in an eighth possible implementation manner, it further includes: sending the first node to the The source base station sends second indication information, where the second indication information is used to indicate to modify the data bearing ratio of the first link.

In combination with the first aspect or any implementation manner of the first possible implementation manner to the eighth possible implementation manner of the first aspect, in a ninth possible implementation manner, the first node determines m second The UE and the n first base stations to which the m second UEs belong include: the first node determines the m second UEs and the n first base stations according to the offload request message received from the third node, The offload request message is used to indicate that the first UE needs to be handed over from the source base station to the target base station and needs to offload the first link.

In combination with the first aspect or any implementation manner of the first possible implementation manner to the ninth possible implementation manner of the first aspect, in a tenth possible implementation manner, it further includes: the first node sending The second node sends third indication information, where the third indication information is used to instruct the second node to exchange data with the first UE through a third link, where the third link is the first UE Two nodes use the link established between the target base station of the first UE and the first UE, and the third link transfers the data bearing capacity of the first link to the m second links. link and the first link is released.

With reference to the tenth possible implementation manner of the first aspect, in an eleventh possible implementation manner, the method further includes: transferring the data carrying capacity of each second link among the m second links to the In the case of the third link, the first node sends fourth indication information to the second node, the n first base stations, and the m second UEs respectively, and the fourth indication information uses Instructing to release the m second links.

In a second aspect, a method for transmitting data is provided, including: when the second node exchanges data with the first UE through the first link and the first UE needs to be handed over from the source base station to the target base station, through n A first base station and m second UEs establish m second links with the first UE, where the first link is between the second node and the first UE through the source base station m and n are both positive integers; the second node exchanges data with the first UE through the m second links respectively.

With reference to the second aspect, in a first possible implementation manner, the m second links are composed of m first sub-links between the second node and the n first base stations, the It consists of m second sublinks between the n first base stations and the m second UEs and m third sublinks between the m second UEs and the first UE, where The m first sub-links, the m second sub-links and the m third sub-links are in one-to-one correspondence.

With reference to the second aspect or the first possible implementation manner of the second aspect, in the second possible implementation manner, it further includes: the second node receives first indication information from the first node, and the first indication The information is used to indicate the data carrying ratio of each second link in the m second links;

Exchanging data between the second node and the first UE through the m second links respectively, includes: the second node according to the data bearer of each second link in the m second links ratio, exchanging data with the first UE through the m second links respectively.

With reference to the first possible implementation manner of the second aspect, in a third possible implementation manner, the method further includes: the second node receives third indication information from the first node, and the third indication information uses Instructing the second node to exchange data with the first UE through a third link, where the third link is the second node communicating with the first UE through the target base station of the first UE Links established between, the third link is established when the data carrying capacity of the first link is transferred to the m second links and the first link is released; The second node exchanges data with the first UE through the third link according to the third indication information.

With reference to the third possible implementation manner of the second aspect, in a fourth possible implementation manner, the method further includes: the second node receives fourth indication information from the first node, and the fourth indication information uses In order to instruct to release the m second links, the fourth instruction information is that the data carrying capacity of each second link in the m second links of the first node is transferred to the third The second node negotiates with the n first base stations respectively according to the fourth indication information to release the m first sub-links.

In a third aspect, a method for transmitting data is provided, including: a first base station receives a first capability polling message from a first node, and the first capability polling message is used to indicate to report capability information of the first base station , the capability information of the first base station is used to indicate the data bearing capability of the first base station; the first base station sends the first base station’s capability information to the first node according to the first capability polling message Capability information: the first base station receives a notification message sent by the first node according to the capability information of the first base station, and the notification message is used to instruct the first base station to establish a first sub-link with a second node and establishing a second sublink with a second UE, where the second UE is controlled by the first base station; the first base station establishes a second sublink with the second node according to the notification message sent by the first node a sub-link, and establish a second sub-link with the second UE, so that a second link is established between the second node and the first UE, and data is exchanged through the second link, wherein the first The second link consists of the first sublink, the second sublink, and a third sublink between the second UE and the first UE.

With reference to the third aspect, in a first possible implementation manner, the method further includes: the first base station receiving first indication information from the first node, where the first indication information is used to indicate that the second link The data carrying ratio of .

In a fourth aspect, a communication node is provided, including: a determining unit configured to exchange data with a first UE through a first link when the second node exchanges data and the first UE needs to be handed over from a source base station to a target base station , determining m second UEs and n first base stations to which the m second UEs belong, the first link is established between the second node and the first UE through the source base station Links, m and n are both positive integers; a sending unit is configured to respectively notify the n first base stations, the m second UEs, and the second node to establish m second links, so that The second node establishes m second links between the n first base stations, the m second UEs, and the first UE, and communicates with the m second links respectively through the m second links. The first UE exchanges data.

With reference to the fourth aspect, in a first possible implementation manner, the m second links are composed of m first sub-links between the second node and the n first base stations, the It consists of m second sublinks between the n first base stations and the m second UEs and m third sublinks between the m second UEs and the first UE, where The m first sub-links, the m second sub-links and the m third sub-links are in one-to-one correspondence.

With reference to the fourth aspect or the first possible implementation manner of the fourth aspect, in a second possible implementation manner, the determining unit is specifically configured to: acquire the basic information of the first UE, and acquire the k-th Capability information of each first base station in a base station and capability information of each second UE in p second UEs, k is a positive integer greater than or equal to n, and p is a positive integer greater than or equal to m; according to the The basic information of the first UE, the capability information of each first base station in the k first base stations, and the capability information of each second UE in the p second UEs, from the p second UEs Select m second UEs, and select n first base stations to which the m second UEs belong from the k first base stations, where the k first base stations are the p second UEs service, the k first base stations and the p second UEs are governed by the first node, and the basic information of the first UE is used to indicate the data bearing capacity of the first UE and the first The direct communication capability supported by the UE with other UEs, the capability information of each first base station in the k first base stations is used to indicate the data bearing capability of each first base station, and the p The capability information of each second UE among the second UEs is used to indicate the bearing capability of each second UE for services other than its own service.

With reference to the second possible implementation manner of the fourth aspect, in a third possible implementation manner, the determining unit is further configured to, according to capability information of each second UE in the m second UEs, determine The data carrying ratio of each second link in the m second links; the sending unit is further configured to send first indication information to the second node and the n first base stations respectively, wherein The first indication information is used to indicate the data carrying ratio of each second link.

With reference to the second possible implementation manner or the third possible implementation manner of the fourth aspect, in a fourth possible implementation manner, a receiving unit is further included; the sending unit is further configured to obtain k Before the capability information of each first base station in the first base station and the capability information of each second UE in the p second UEs, respectively send a first capability polling message to the k first base stations, and send a first capability polling message to the k first base stations respectively, The p second UEs send a second capability polling message, where the first capability polling message is used to indicate reporting of capability information of the first base station, and the second capability polling message is used to indicate reporting of the first base station's capability information. Two UE capability information; the determining unit is specifically configured to receive the capability information of each first base station in the k base stations through the receiving unit, and receive the capability information of each second UE in the p second UEs capability information.

With reference to any implementation manner of the second possible implementation manner to the fourth possible implementation manner of the fourth aspect, in a fifth possible implementation manner, the determining unit is specifically configured to acquire the Describe the basic information of the first UE.

With reference to the fourth aspect or the first possible implementation manner to the fifth possible implementation manner of the fourth aspect, in a sixth possible implementation manner, the sending unit is further configured to send the first Two indication information, where the second indication information is used to indicate modification of the data carrying ratio of the first link.

With reference to the fourth aspect or the first possible implementation manner to the sixth possible implementation manner of the fourth aspect, in a seventh possible implementation manner, the determining unit is specifically configured to: A request message to determine m second UEs and the n first base stations, where the offload request message is used to indicate that the first UE needs to be handed over from the source base station to the target base station and needs to perform a handover on the first link The road is divided.

Combining the fourth aspect or the first possible implementation manner to the seventh possible implementation manner of the fourth aspect, in the eighth possible implementation manner,

The sending unit is further configured to send third indication information to the second node, where the third indication information is used to instruct the second node to exchange data with the first UE through a third link, wherein, The third link is a link established between the second node and the first UE through the target base station of the first UE, and the third link is a data link in the first link It is established when the bearer capacity is transferred to the m second links and the first links are released.

In combination with the eighth possible implementation of the fourth aspect, in the ninth possible implementation,

The sending unit is further configured to send data to the second node, the The n first base stations and the m second UEs send fourth indication information, where the fourth indication information is used to indicate to release the m second links.

In a fifth aspect, a communication node is provided, including: an establishment unit configured to exchange data with a first UE through a first link and the first UE needs to be handed over from a source base station to a target base station, through n m first base stations and m second UEs establish m second links with the first UE, where the first link is the second node connecting the source base station of the first UE with the For links established between the first UEs, m and n are both positive integers; an interaction unit is configured to exchange data with the first UE through the m second links respectively.

With reference to the fifth aspect, in a first possible implementation manner, the m second links are composed of m first sub-links between the second node and the n first base stations, the It consists of m second sublinks between the n first base stations and the m second UEs and m third sublinks between the m second UEs and the first UE, where The m first sub-links, the m second sub-links and the m third sub-links are in one-to-one correspondence.

With reference to the fifth aspect or the first possible implementation manner of the fifth aspect, in a second possible implementation manner, a receiving unit is further included; the receiving unit is configured to receive the first indication information from the first node, and the The first indication information is used to indicate the data carrying ratio of each second link in the m second links; the interaction unit is specifically configured to The data carrying ratio of the link is to exchange data with the first UE through the m second links respectively.

In combination with the first possible implementation manner of the fifth aspect, in a third possible implementation manner, a receiving unit is further included;

The receiving unit is configured to receive third indication information from the first node, where the third indication information is used to instruct the second node to exchange data with the first UE through a third link, wherein the The third link is a link established between the second node and the first UE through the target base station of the first UE, and the data bearing capacity of the third link in the first link established when transferring to the m second links and the first links are released; the interaction unit is specifically configured to communicate with the m second links through the third link according to the third indication information The first UE interaction data.

In combination with the third possible implementation manner of the fifth aspect, in a fourth possible implementation manner, a release unit is further included;

The receiving unit is further configured to receive fourth indication information from the first node, the fourth indication information is used to indicate the release of the m second links, and the fourth indication information is the first sent by the node when the data carrying capacity of each of the m second links is transferred to the third link; the release unit is configured to, according to the fourth indication information, Negotiate with the n first base stations respectively to release the m first sub-links.

In a sixth aspect, a base station is provided, including: a receiving unit, configured to receive a first capability polling message from a first node, where the first capability polling message is used to indicate to report capability information of the base station, the The capability information of the base station is used to indicate the data bearing capability of the base station; the sending unit is configured to send the capability information of the first base station to the first node according to the first capability polling message; the receiving unit , used to receive a notification message sent by the first node according to the capability information of the base station, where the notification message is used to instruct the base station to establish a first sub-link with a second node and establish a second sub-link with a second UE. A link, wherein the second UE is controlled by the base station; an establishing unit, configured to establish a first sub-link with the second node according to the notification message sent by the first node, and establish a sub-link with the second UE A second sub-link, so that a second link is established between the second node and the first UE, and data is exchanged through the second link, wherein the second link is routed by the first sub-link , the second sublink, and a third sublink between the second UE and the first UE.

With reference to the sixth aspect, in a first possible implementation manner, the receiving unit is further configured to receive first indication information from the first node, where the first indication information is used to indicate that the second link The data carrying ratio of .

In the embodiment of the present invention, when the second node exchanges data with the first UE through the first link, the first node sends the second node, the m second UEs, and the nth UEs to which the m second UEs belong A base station notifies the establishment of m second links, so that the second node can exchange data with the first UE through the m second links, and the first link is the second node and the first UE through the source base station of the first UE Therefore, it can ensure that the data transmission is not interrupted during the handover process of the UE from the source base station to the target base station, thereby improving user experience.

Description of drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the accompanying drawings required in the embodiments of the present invention. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For Those of ordinary skill in the art can also obtain other drawings based on these drawings without making creative efforts.

Fig. 1 is a schematic diagram of a scene where an embodiment of the present invention can be applied.

Fig. 2 is a schematic diagram of another scene where the embodiment of the present invention can be applied.

Fig. 3 is a schematic flowchart of a method for transmitting data according to an embodiment of the present invention.

Fig. 4a is a schematic flowchart of a method for transmitting data according to another embodiment of the present invention.

Fig. 4b is a schematic flowchart of a method for transmitting data according to another embodiment of the present invention.

Fig. 5 is a schematic diagram of a network architecture according to an embodiment of the present invention.

Fig. 6 is a schematic flowchart of a process of transmitting data according to an embodiment of the present invention.

Fig. 7 is a schematic flowchart of a process of a method for transmitting data according to another embodiment of the present invention.

Fig. 8 is a schematic flowchart of a process of a method for transmitting data according to another embodiment of the present invention.

Fig. 9 is a schematic block diagram of a communication node according to one embodiment of the present invention.

Fig. 10 is a schematic block diagram of a communication node according to another embodiment of the present invention.

Fig. 11 is a schematic block diagram of a base station according to an embodiment of the present invention.

Fig. 12 is a schematic block diagram of a communication node according to another embodiment of the present invention.

Fig. 13 is a schematic block diagram of a communication node according to another embodiment of the present invention.

Fig. 14 is a schematic block diagram of a base station according to another embodiment of the present invention.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

The technical scheme of the present invention can be applied to various communication systems, such as: Global System of Mobile Communication (Global System of Mobile communication, GSM), Code Division Multiple Access (Code Division Multiple Access, CDMA) system, Wideband Code Division Multiple Access (Wideband Code Division Multiple Access Wireless, WCDMA), General Packet Radio Service (GPRS), Long Term Evolution (LTE), etc.

User equipment (User Equipment, UE), also known as mobile terminal (Mobile Terminal, MT), mobile user equipment, etc., can communicate with one or more core networks via a radio access network (for example, Radio Access Network, RAN) to communicate. User equipment may be mobile terminals, such as mobile phones (or called "cellular" phones) and computers with mobile terminals, for example, portable, pocket, hand-held, computer built-in or vehicle-mounted mobile devices.

The base station can be a base station (Base Transceiver Station, BTS) in GSM or CDMA, a base station (NodeB) in WCDMA, or an evolved base station (evolved Node B, eNB or e-NodeB) in LTE. The present invention is not limited.

Fig. 1 is a schematic diagram of a scene where an embodiment of the present invention can be applied.

In the scenario in Fig. 1, both eNB 110a and eNB 110b may be macro base stations. In the case that UE 130 is located in cell 120a of eNB 110a, UE 130 can perform data transmission with eNB 110a. In the case that the UE 130 enters the cell 120b of the eNB 110b across the boundary of the cell 120a, the UE 130 can perform data transmission with the eNB 110b.

After the UE 130 crosses the border of the cell 120a and enters the cell 120b, the UE 130 needs to perform cell handover, that is, handover from the eNB 110a to the eNB 110b. During the handover process, UE130 may first cut off the RRC connection with eNB110a, and then establish RRC connection with eNB110b.

Fig. 2 is a schematic diagram of another scene where the embodiment of the present invention can be applied.

The scenario shown in FIG. 2 may be a macro-micro heterogeneous networking scenario. As shown in FIG. 2 , both low power nodes (Low Power Node, LPN) 210a and LPN210b are deployed within the coverage of eNB220. eNB 220 may be a macro base station. When UE 230 is located in micro cell 240a of LPN 210a, UE 230 can perform data transmission with LPN 210a. When the UE 230 enters the micro cell 240b of the LPN 210b through the boundary of the micro cell 240a, the UE 230 can perform data transmission with the LPN 210b.

After the UE 230 enters the cell 240b through the boundary of the micro cell 240a, the UE 230 needs to perform cell switching, that is, switching from the LPN 210a to the LPN 210b. During the handover process, UE230 may first cut off the RRC connection with LPN210a, and then establish the RRC connection with LPN210b.

In the scenario of FIG. 1 , if the cell handover is performed according to the method in the prior art, the data transmission between UE130 and eNB110a and eNB110b will be interrupted during the handover process. Similarly, in the scenario of FIG. 2 , the data transmission between UE230 and LPN210a and LPN210b will also be interrupted during the handover process. That is, during the handover process of the UE, the phenomenon of "interruption" of data transmission may occur. However, the embodiment of the present invention can solve this "interruption" problem, and the embodiment of the present invention will be described in detail below.

Fig. 3 is a schematic flowchart of a method for transmitting data according to an embodiment of the present invention. The method of Fig. 3 is performed by a communication node in the network.

310. When the second node exchanges data with the first UE through the first link and the first UE needs to be handed over from the source base station to the target base station, the first node determines m second UEs and the network to which the m second UEs belong. There are n first base stations, the first link is a link established between the second node and the first UE through the source base station of the first UE, and both m and n are positive integers.

In the embodiment of the present invention, the first node may also be called a control node, and is used to control the process of the embodiment of the present invention. For example, the first node may be a source base station or a target base station, or other third-party nodes. For example, the first node may be the eNB220 in FIG. 2 , or the first node may be an independent centralized controller (Controller).

In the embodiment of the present invention, the second node may also be referred to as a data splitting and forwarding node, and is used for transmitting data or splitting data, and the like. For example, the second node may be a packet data network gateway (Packet DataNetwork Gateway, P-GW), or may also be a serving gateway (Serving Gateway, S-GW), or may also be a macro base station deployed in a micro base station scenario.

Generally, the data offloading and forwarding node can perform data transmission with the UE through the serving base station of the UE. For example, in this embodiment of the present invention, before the first UE performs cell handover, the second node may perform data transmission with the first UE through the first link, and the first link may include the communication between the second node and the source base station. A sublink and a sublink between the source base station and the first UE.

It should be noted that the "interaction data" mentioned in this embodiment of the present invention may refer to interactive uplink data or interactive downlink data. This embodiment of the present invention does not limit this.

320. The first node notifies the n first base stations, the m second UEs, and the second node to establish m second links, so that the second node communicates with the first m second links are established between the UEs, and data is exchanged with the first UE through the m second links respectively.

As a control node, the first node may control the second node to establish m second links with the first UE through n first base stations and m second UEs. The m second links may distribute the first link.

It can be seen that the second UE and the first base station assist in transmitting data of the first UE, so the second UE may also be called an assisting UE, and the first base station to which the second UE belongs may also be called an assisting node. The process in the embodiment of the present invention may also be a UE-assisted offloading process.

The aforementioned n first base stations may include a source base station, a target base station, or base stations of other third-party cells, for example, may include the macro base station 230 in the scenario in FIG. 2 . The m second UEs may include one or more UEs served by the n first base stations.

In this way, when the first UE is handed over from the source base station to the target base station, after the first link is cut off and before the third link is established with the second node through the target base station, it can communicate with the second node through m second links. Nodes exchange data without interrupting data transmission, so the interruption of data transmission of the first UE during handover from the source base station to the target base station can be avoided, thereby improving user experience.

In the embodiment of the present invention, when the second node exchanges data with the first UE through the first link, the first node sends the second node, the m second UEs, and the nth UEs to which the m second UEs belong A base station notifies the establishment of m second links, so that the second node can exchange data with the first UE through the m second links, and the first link is the second node and the first UE through the source base station of the first UE Therefore, it can ensure that the data transmission is not interrupted during the handover process of the UE from the source base station to the target base station, thereby improving user experience.

Optionally, as an embodiment, the first node may determine m second UEs and n first base stations according to the offload request message received from the third node, where the offload request message is used to indicate that the first UE needs to from the source The base station is handed over to the target base station and needs to offload the first link.

In this embodiment of the present invention, the third node may also be called a UE-assisted offload initiation node. The third node may be a source base station, a target base station or a first UE. For example, when the third node is the source base station, the source base station may send an offload request message to the first node when the air interface quality measurement report reported by the first UE meets the handover initiation condition. When the third node is the target base station, the target base station may send the offload request message to the first node when receiving the handover request message from the source base station. When the third node is the first UE, the first UE may send an offload request message to the first node when it is determined that the local air interface quality measurement result meets the handover initiation condition.

It can also be seen from the foregoing that in the embodiment of the present invention, the first node, the second node, and the third node may be implemented by the same physical entity or different physical entities. For example, the first node, the second node and the third node can all be integrated in the same base station as functional modules. For another example, the first node and the second node may be respectively integrated as functional modules in the same base station, such as the above-mentioned first base station. Alternatively, the first node and the third node may be respectively integrated as functional modules in the same base station, such as the above-mentioned first base station. Alternatively, the first node, the second node and the third node may also be physical entities independent of each other. In addition, the first base station and the target base station may also be implemented by the same base station entity. This embodiment of the present invention does not limit this.

Optionally, as another embodiment, the m second links are composed of m first sub-links between the second node and n first base stations, and between n first base stations and m second UEs m second sub-links and m third sub-links between m second UEs and the first UE, wherein m first sub-links, m second sub-links and m first sub-links The three sub-links are in one-to-one correspondence.

Each second link may be composed of three sub-links, that is, the first sub-link between the second node and the first base station, the second sub-link between the first base station and the second UE, and the second sub-link between the first base station and the second UE. A third sublink between the UE and the first UE. Therefore, the second link is established by establishing the first sub-link, the second sub-link and the third sub-link. The establishment process of each sub-link may refer to the prior art. For example, the first node may notify the second node and the n first base stations of the relevant parameters for establishing the first sublink, and the second node and each first base station may be configured according to the relevant parameters for establishing the first sublink , and negotiate with each other, so as to complete the establishment process of the m first sub-links. The first node may also send related parameters for establishing the second sublink to n first base stations and m second UEs respectively, and each first base station and the second UE served may transmit the parameters related to establishing the second sublink according to the parameters for establishing the second sublink. Relevant parameters are configured and negotiated with each other, so as to complete the establishment process of m second sub-links. Each second UE may perform direct communication negotiation with the first UE, so as to complete the establishment process of the m third sub-links.

Optionally, as another embodiment, the first node may send second indication information to the source base station, where the second indication information is used to indicate modification of the data bearing ratio of the first link.

The data bearing capability of the UE is controlled by the serving base station to which it belongs. Specifically, the serving base station establishes a link with a large bearer capacity for the UE, and the UE will occupy the bearer link for uplink data transmission. Since m second links are established between the second node and the first UE, the data carrying ratio of the original first link needs to be modified so that the data carrying ratio of the first link is the same as that of the m second links The total data bearing ratio of will not exceed the data transmission requirement of the network, so as to ensure that the second node can receive all the uplink data of the first UE. The data carrying ratio of the link can refer to the proportion shared by the data transmission demand of the network, and the data transmission demand can include data transmission bandwidth or data transmission rate, etc., then the data carrying ratio of the link can be the sharing of the data transmission bandwidth, It can also be a sharing of the data transmission rate. The data carrying ratio of the link also reflects the data carrying capacity of the link.

For example, if the data transmission requirement of the network is 10M byte/s, before m second links are established, the original data carrying ratio of the first link is 100%, that is, the original data carrying capacity of the first link is 10M byte /s, after m second links are established, assuming that the total data carrying ratio of the current m second links is 60%, then the total data carrying capacity of the m second links is 6M byte/s, then The second node and the source base station need to modify the data carrying ratio of the first link to 40%, that is, modify the data carrying capacity of the first link to 4M byte/s.

Optionally, as another embodiment, in step 320, the first node may obtain the basic information of the first UE, and obtain the capability information of each of the k first base stations and the For the capability information of each second UE, k is a positive integer greater than or equal to n, and p is a positive integer greater than or equal to m. The first node selects m from the p second UEs according to the basic information of the first UE, the capability information of each of the k first base stations, and the capability information of each of the p second UEs. second UEs, and select n first base stations to which m second UEs belong from the k first base stations.

Among them, k first base stations serve p second UEs, k first base stations and p second UEs are managed by the first node, and the basic information of the first UE is used to indicate the data bearing capacity of the first UE and the The direct communication capability supported by a UE with other UEs, the capability information of each first base station among the k first base stations is used to indicate the data bearing capability of each first base station, and each of the p second UEs The capability information of each second UE is used to indicate the bearing capability of each second UE for services other than its own service.

Whether the second UE can assist in the transmission of the first data depends on its ability to bear services other than its own services. Therefore, the above-mentioned second UE's data bearing capacity may be the second UE's bearing capacity for services other than its own business, including the second UE's bearing capacity for services other than its own business, and the second UE's data bearing capacity may include data transmission rate and transmission bandwidth. or data transmission delay, etc.

For example, the m second UEs selected by the first node may meet the following conditions: the direct communication mode supported by them is the same as the direct communication mode of the first UE, and their data transmission rate is the same as that of the first UE. speed matching etc. Then, the first node may select n first base stations to which the m second UEs belong from the k first base stations.

Optionally, as another embodiment, the capability information of each first base station may include at least one of the following: current load and remaining resources.

The above-mentioned capability information of each second UE may include: whether it has the capability of performing direct communication with other UEs, supported modes of direct communication with other UEs, parameter configuration of direct communication and UE identity.

Supportable modes for direct communication with other UEs may include D2D mode, bluetooth mode, or infrared mode.

The capability information of the second UE may also include remaining energy consumption, current service type, service priority, and the like.

Optionally, as another embodiment, the basic information of the first UE may include basic information of data transmission of the first UE and direct communication information of the first UE, and the direct communication information may include information related to A mode in which other UEs perform direct communication.

Specifically, the basic information of the data transmission of the first UE may include parameters such as a data transmission rate, a service type, and a service priority of the first UE.

Directly connected communication may refer to direct communication between UEs. The mode supported by the first UE for direct communication with other UEs may include a device-to-device (Device to Device, D2D) mode, an infrared mode, or a bluetooth mode. The direct communication information may also include an identifier of the first UE, a network location of the first UE, and the like.

Optionally, as another embodiment, the first node may determine the proportion of data carried by each of the m second links according to the capability information of each of the m second UEs. The first node sends first indication information to the second node and the n first base stations respectively, where the first indication information is used to indicate the data bearing ratio of each second link.

As described above, the capability information of the second UE may indicate the bearer capability of the second UE for services other than its own service. In addition, the first node can also obtain air interface quality measurement information and current system status information, and determine the data bearing capacity of each second link in the m second links according to the data bearing capacity of each second UE and these information Proportion. For example, assuming that m is 2, that is, there are 2 second UEs, then 2 second links can be established. The first node may determine the data carrying ratio of each second link according to the data transmission rates of the two second UEs. For example, if the data transmission rate of UE1 is greater than that of UE2, then the data carrying ratio of the second link where UE1 is located may be 70%, and the data bearing ratio of the second link where UE2 is located may be 30%.

The first node may notify the second node and n first base stations through the first indication information, so that both the second node and the first UE can respectively pass through m second links according to the data carrying ratio of each second link transfer data.

Optionally, as another embodiment, the first node may send a first capability polling message to k first base stations respectively, and send a second capability polling message to p second UEs respectively, the first capability polling The message is used to indicate to report the capability information of each first base station, and the second capability polling message is used to indicate to report the capability information of each second UE. The first node may receive capability information of each first base station in the k base stations, and receive capability information of each second UE in the p second UEs.

The first node may send a capability polling message to each base station and each UE under its jurisdiction. Wherein, the first node may transparently transmit the capability polling message to each UE under its jurisdiction through each base station under its jurisdiction. The p second UEs may also transparently transmit their capability information to the first node through the k first base stations.

Optionally, as another embodiment, the first node may acquire basic information of the first UE from the source base station.

For example, the first node may directly receive the basic information of the first UE from the source base station. Alternatively, the third node may receive the basic information of the first UE from the source base station, and then send the basic information of the first UE to the first node through the foregoing offload request message.

In addition, the network management device may also store the basic information of the first UE when the first UE accesses the network. In this way, the first node can obtain the basic information of the first UE from the network management device.

Optionally, as another embodiment, the first node may send third indication information to the second node, where the third indication information is used to instruct the second node to exchange data with the first UE through a third link, where the third The link is a link established between the second node and the first UE through the target base station, and the third link transfers the data carrying capacity of the first link to m second links and the first link is released built under.

As mentioned above, the data carrying capacity of a link may refer to the data transmission requirement shared by the link. Data transfer requirements may include data transfer bandwidth or data transfer rate. Then, the data carrying capacity of the link may also be represented by a data transmission bandwidth or a data transmission rate, for example, it may be 5 Mbyte/s.

After the data bearing capability of the first link is transferred to the m second links, the first UE may perform a cell switching process. Specifically, the first UE may detach from the source base station and synchronize with the target base station. That is, the first UE may disconnect the first link, and establish a third link between the target base station and the second node, thereby completing the handover process.

After the first UE is handed over from the source base station to the target base station, the first node may notify the second node that data can be exchanged with the first UE through the third link.

Optionally, as another embodiment, in the case where the data carrying capacity of each second link in the m second links is transferred to the third link, the first node may transfer the data to the second node, n The first base station and the m second UEs send fourth indication information, where the fourth indication information is used to indicate release of the m second links.

After the data carrying capacity of each of the m second links is transferred to the third link, that is, after the third link alone bears the data transmission requirements, the first node can transfer to the second node, n The first base station and the m second UEs notify to release resources occupied by the m second links. Since each second link may include the first sub-link between the second node and the first base station, the second sub-link between the first base station and the second UE, and the second sub-link between the second UE and the first UE the third sublink of . Then, the second node and the first base station may release the first sublink between them according to the fourth indication information. The first base station and the second UE may release the second sublink between them according to the fourth indication information. The second UE may release the third sublink between itself and the first UE according to the fourth indication information.

Fig. 4a is a schematic flowchart of a method for transmitting data according to another embodiment of the present invention. The method of Fig. 4a is performed by a communication node.

410a, when the second node exchanges data with the first UE through the first link between the source base station and the first UE and the first UE needs to be handed over from the source base station to the target base station, through n first base stations and m A second UE establishes m second links with the first UE, wherein the first link is a link established between the second node and the first UE through the source base station of the first UE, and both m and n are positive integer.

420a. The second node exchanges data with the first UE through m second links respectively.

In the embodiment of the present invention, when the second node exchanges data with the first UE through the first link, m second links are established with the first UE through n first base stations and m second UEs, and Exchanging data with the first UE through m second links respectively, and the first link is a link established between the second node and the first UE through the source base station of the first UE, so it can be guaranteed that the source base station of the UE Data transmission during handover to the target base station is not interrupted, thereby improving user experience.

Optionally, as another embodiment, the m second links may be composed of m first sub-links between the second node and n first base stations, and between n first base stations and m second UEs. between m second sublinks and m third sublinks between m second UEs and the first UE, wherein m first sublinks, m second sublinks and m The third sub-links are in one-to-one correspondence. Before step 410, the second node may receive first indication information from the first node, where the first indication information is used to indicate establishment of m first sub-links.

Specifically, in step 420a, the second node can establish m first sub-links between them with n first base stations, and at the same time, n first base stations can establish their sublinks with m second UEs m second sub-links between them, m second UEs can establish m third sub-links between them with the first UE, thereby establishing m second links.

Optionally, as an embodiment, the second node may receive first indication information from the first node, where the first indication information is used to indicate the data carrying ratio of each second link in the m second links. The second node may exchange data with the first UE through the m second links respectively according to the data carrying ratio of each second link in the m second links.

Optionally, as another embodiment, the second node may receive third indication information from the first node, where the third indication information is used to instruct the second node to exchange data with the first UE through a third link, and the third link is the link established between the second node and the first UE through the target base station of the first UE, the data bearing capability of the third link in the first link is transferred to m second links and the first link is released established under the circumstances.

Specifically, after the data bearing capability of the first link is transferred to the m second links, the first UE may perform a cell handover procedure. The first UE may detach from the source base station and synchronize with the target base station. That is, the first UE may disconnect the first link, and establish a third link between the target base station and the second node, thereby completing the handover process. In this way, during the handover process, the second node and the first UE can perform data transmission through the m second links.

Specifically, the process of transferring the data carrying capacity of the first link to m second links can be accomplished in different ways. For example, all the data carrying capacity of the first link may be transferred to m second links at one time. Alternatively, the process of transferring the data carrying capacity of the first link to the m second links may also be completed successively.

For example, the process of transferring the data carrying capacity of the first link may be divided into q sub-processes, where q is a positive integer greater than 1. In the first sub-process, 20% of the data carrying capacity of the first link may be transferred to m second links.

In the next sub-process, 40% of the data carrying capacity of the first link may be transferred to m second links. By analogy, until all the data carrying capacity of the first link is transferred to the m second links. In each sub-process, how much data each second link is used to transmit may be determined according to the above-mentioned data carrying ratio of each second link.

Optionally, as another embodiment, the second node receives fourth indication information from the first node, the fourth indication information is used to indicate the release of m second links, and the fourth indication information is that the first node It is sent when the data carrying capacity of each second link in the two links is transferred to the third link. The second node negotiates with the n first base stations respectively according to the fourth indication information, so as to release the m first sub-links.

Similar to transferring the data carrying capacity of the first link to m second links, after the first UE establishes the third link with the second node through the target base station, the data carrying capacity of the m second links can be transferred to the third link. This process can be completed at one time, or can be completed in multiple sub-processes.

For example, the data bearing capabilities of the m second links may be transferred to the third link at one time.

Alternatively, the data carrying capacity of the m second links may also be transferred to the third link successively. For example, the process of transferring the data carrying capacity of the m second links to the third link may be divided into q sub-processes, where q is a positive integer greater than 1. In the first sub-process, 20% of the total data carrying capacity of the m second links may be transferred to the third link. In the next sub-process, 40% of the total data carrying capacity of the m second links may be transferred to the third link. By analogy, until all the total data carrying capacity of the m second links is transferred to the third link.

After the data carrying capacity of the m second links can be transferred to the third link, the second node can negotiate with the n first base stations to release the m first sub-links, thereby reducing unnecessary resource occupation.

Fig. 4b is a schematic flowchart of a method for transmitting data according to another embodiment of the present invention. The method in FIG. 4b is executed by the first base station, that is, executed by the assisting base station.

410b. The first base station receives a first capability polling message from the first node, where the first capability polling message is used to indicate reporting of capability information of the first base station, and the capability information of the first base station is used to indicate the data bearing capability of the first base station .

For example, the capability information of the first base station may include at least one of the following: current load and remaining resources.

420b. The first base station sends capability information of the first base station to the first node according to the first capability polling message.

430b. The first base station receives a notification message sent by the first node according to the capability information of the first base station, where the notification message is used to instruct the first base station to establish a first sublink with the second node and establish a second sublink with the second UE , wherein the second UE is controlled by the first base station.

In order to determine whether the first base station can serve as the aforementioned auxiliary base station, the first node needs to obtain its capability information from the first base station. If the data bearing capacity of the first base station meets the requirements of being an auxiliary base station, the first node can notify the first base station to assist in establishing the second link, that is, indicate the first base station to communicate with the second node and the second node served by the first base station. The UE establishes corresponding sublinks.

440b. The first base station establishes a first sublink with the second node according to the notification message sent by the first node, and establishes a second sublink with the second UE, so that a second sublink is established between the second node and the first UE. link, and exchange data through the second link, where the second link consists of the first sub-link, the second sub-link, and the third sub-link between the second UE and the first UE.

The second link between the second node and the first UE can be composed of three sub-links, that is, the first sub-link between the second node and the first base station, the first sub-link between the first base station and the second UE It is composed of the second sub-link and the third sub-link between the second UE and the first UE. Then in order to establish the second link, the first base station

In the embodiment of the present invention, the first base station establishes the first sublink with the second node according to the notification message of the first node, and establishes the second sublink with the second UE, so that the connection between the second node and the first UE Establish a second link between the UEs, and exchange data through the second link, so it can ensure that the data transmission is not interrupted during the handover process of the UE from the source base station to the target base station, thereby improving user experience.

Optionally, as an embodiment, the first base station may receive first indication information from the first node, where the first indication information is used to indicate the data bearing ratio of the second link.

Embodiments of the present invention will be described in detail below in conjunction with specific examples. It should be understood that these examples are only intended to help those skilled in the art better understand the embodiments of the present invention, rather than limit the scope of the embodiments of the present invention.

Fig. 5 is a schematic diagram of a network architecture according to an embodiment of the present invention.

In the network architecture of FIG. 5 , the second node 502 may be a data splitting and forwarding node, such as a P-GW or an S-GW.

When the first UE503 is within the coverage of the source base station 504, the second node 502 can establish a first link 509 with the first UE503 through the source base station 504, and exchange data with the first UE503 through the first link 509.

When the first UE503 moves towards the target base station 505, the signal of the source base station 504 will gradually weaken, while the signal of the target base station 505 will gradually increase, so the air interface quality measurement result of the first UE503 satisfies the handover condition, and the first UE503 will transfer from the source base station to the target base station 505. The base station 504 is handed over to the target base station 505 .

In order to ensure that data transmission is not interrupted during the handover process of the first UE503 from the source base station 504 to the target base station 505, the third node 508 may request the first node 501 to offload the first link 509 before the first UE503 performs handover.

The first node 501 may, according to the request of the third node 508, control the second node 502 to establish a second link 510a between the first base station 506a and the second UE 506b and the first UE 503, and control the second node 502 to pass through the first base station 507a and a second link 510b is established between the second UE 507b and the first UE 503 . In this way, the second node 502 can exchange data with the first UE 503 through two second links. Wherein, the first base station 506a serves the second UE 506b, and the first base station 507a serves the second UE 507b.

Then when all the data carrying capacity of the first link 509 is transferred to the two second links, the first UE503 can cut off the first link, and establish the third link 511 between the target base station 505 and the second node 502 . The second node 502 may exchange data with the first UE 503 through the third link 511 . After all the data bearing capabilities of the two second links are transferred to the third link, each node on the two second links may release the second link.

In the embodiment of the present invention, when the second node exchanges data with the first UE through the first link, the first node notifies the second node, the second UE, and the first base station to which the second UE belongs to establish the second node. Link, so that the second node can exchange data with the first UE through the second link, and the first link is the link established between the second node and the first UE through the source base station of the first UE, so it can ensure During the handover process of the UE from the source base station to the target base station, data transmission is not interrupted, thereby improving user experience.

The data transmission process based on the network architecture of FIG. 5 will be described in detail below with reference to FIG. 6 .

Fig. 6 is a schematic flowchart of a process of transmitting data according to an embodiment of the present invention.

In FIG. 6, when the first UE is located within the coverage of the source base station, the second node performs data transmission through the first link, and the first link is a link established between the second node and the first UE through the source base station.

601. The third node 508 sends an offload request message to the first node 501, where the offload request message is used to indicate that the first UE 503 needs to be handed over from the source base station 504 to the target base station 505 and needs to offload the first link 509.

The offload request message may carry basic information of the first UE503, such as data transmission information of the first UE503 and direct communication information of the first UE503.

602. Based on the offload request message, the first node 501 performs a capability poll to the two first base stations 506a and 507a under its jurisdiction, the second UE 506b served by the first base station 506a, and the second UE 507b served by the first base station 507a.

Specifically, the first node may send first capability polling messages to the two first base stations respectively, where the first capability polling messages indicate to report capability information.

The first node may respectively send second capability polling messages to the two second UEs, where the second capability polling messages indicate to report capability information. Wherein, the second capability polling message may be transparently transmitted to the second UE through the first base station.

The two first base stations can respectively send their capability information to the first node, and the two second UEs can also transparently transmit their capability information to the first node through the corresponding first base stations.

The capability information of each first base station may include at least one of the following: current load and remaining resources.

The capability information of each second UE may include: whether it has the ability to perform direct communication with other UEs, the supported mode for direct communication with other UEs, parameter configuration for direct communication, UE identity, remaining energy consumption, Current business type and business priority, etc.

603. The first node 501 determines that both of the two second UEs can serve as The auxiliary UE of the first UE also determines two first base stations as auxiliary base stations accordingly.

Specifically, if the data bearing capabilities of the two second UEs can both meet the condition for transmitting the data of the first UE, then both the two second UEs may be used as auxiliary UEs.

604. The first node 501 determines the respective data bearing ratios of the two second links according to the capability information of the two second UEs.

Since there are 2 second UEs that can serve as auxiliary UEs, 2 second links can be established. The first node may separately determine the data carrying ratio of each second link.

605. The first node 501 sends a first notification message to the second node 502.

The first notification message may carry relevant parameters for establishing the second link, and may carry the data bearing ratio of each second link.

606. The first node 501 sends a second notification message to the two first base stations and the two second UEs.

The second notification message may carry related parameters of the established second link, and may carry the data bearing ratio of each second link.

607. The second node 502 establishes two second links 510a and 510b with the first UE through the two first base stations and the two second UEs.

Specifically, the second node and the two first base stations can respectively establish two first sub-links, the two first base stations respectively establish second sub-links with the second UE served by them, and the two UEs respectively communicate with the first UE Two third sub-links are established.

608. The first node 501 sends a third notification message to the source base station 504.

The third notification message may be used to instruct the source base station to modify the data bearing ratio of the first link.

609. The second node 502 transmits data with the first UE 503 through the two established second links.

610. The first node 501 sends an offload response message to the third node 508, where the offload response message is used to indicate that the second link is successfully established.

The data carrying capacity of the first link 509 may be entirely transferred to the second links 510a and 510b. In this way, the first UE 503 can perform cell handover, that is, handover from the source base station 504 to the target base station 505 . In the handover process, the first UE 503 may cut off the first link 509 first, and then establish a third link 511 between the target base station 505 and the second node 502 .

611. The first UE 503 establishes a third link 511 between the target base station 505 and the second node 502.

612. The first node 501 sends a fourth notification message to the second node 502.

The fourth notification message may be used to indicate that the second node 502 transmits data with the first UE 503 through the third link 511 .

613. The second node 502 transmits data with the first UE 503 through the third link 511 according to the fourth notification message.

614. After all the data bearing capabilities of the 2 second links are transferred to the third link, the first node 501 sends a fifth notification message to the second node 502, the 2 first base stations, and the 2 second UEs.

The fifth notification message may indicate to release the two second links.

The following will describe in detail the change of the data bearing ratio of each link when the first UE performs cell handover with reference to specific examples. Table 1 describes in detail the data carrying ratio of each link in the process of performing cell handover by the first UE in combination with specific examples. In Table 1, it is assumed that the data transmission requirement is 1.

Table 1

In Table 1, "—" indicates that the link does not exist; char=char_1+char_2, where char can refer to alpha, beta or eta in table 1.

Before the handover process is executed, neither the second link nor the third link exists, and the second node 502 exchanges data with the first UE 501 through the first link 509 . At this time, the data bearing ratio of the first link 509 is 1.

At moment 1 when the handover process starts, the second links 510a and 510 are successfully established, but no data is carried at this time, and the second node 502 still exchanges data with the first UE 501 through the first link 509. At this time, the first The data bearing ratio of the link 509 is 1, and the data bearing ratios of the two second links are both 0. At time 2 in the handover process, the second node 502 may exchange data with the first UE 501 through the first link 509 and the second links 510a and 510b. At this time, the data carrying ratio of the first link 509 may be (1-alpha), the data carrying ratio of the second link 510a may be alpha_1, and the data carrying ratio of the second link 510b may be alpha_2, where alpha=alpha_1 +alpha_2, it can be seen that at this time, the data transmission requirement is shared by the first link, the second link 510a and the second link 510b. At time 3 in the handover process, the second node 502 can still exchange data with the first UE 501 through the first link 509 and the second links 510a and 510b. At this time, the data carrying ratio of the first link 509 may be (1-beta), the data carrying ratio of the second link 510a may be beta_1, and the data carrying ratio of the second link 510b may be beta_2, where beta=beta_1 +beta_2. At time 4 in the handover process, the second node 502 may transfer the data carrying ratio of the first link 509 to the second links 510a and 510b. That is, the second node 502 can exchange data through the second links 510a and 510b. At this time, the data carrying ratio of the second link 510a may be 1-gamma, and the data carrying ratio of the second link 510b may be gamma. By analogy, at time 7 during the handover process, the data bearing ratios of the second links 510 a and 510 b are all transferred to the third link 511 . The second node 502 may exchange data with the first UE 501 through the third link 511 . In this way, the second node 502, the first base station 506a, the second UE506b and the first UE503 can release the second link 510a, and the second node 502, the first base station 507a, the second UE507b and the first UE503 can release the second link 510b.

It should be noted that in the above step 603, if the first node 501 fails to determine a suitable second UE and first base station, the offload response message in step 610 will indicate that the offload request fails.

It should be understood that the sequence numbers of the above processes do not mean the order of execution, and the execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiment of the present invention. For example, steps 606 and 607 can be performed simultaneously, and step 607 can also be performed before step 606 .

In the embodiment of the present invention, when the second node exchanges data with the first UE through the first link, the first node notifies the second node, the second UE, and the first base station to which the second UE belongs to establish the second node. Link, so that the second node can exchange data with the first UE through the second link, and the first link is the link established between the second node and the first UE through the source base station of the first UE, so it can ensure During the handover process of the UE from the source base station to the target base station, data transmission is not interrupted, thereby improving user experience.

Embodiments of the present invention will be described in detail below in conjunction with specific examples.

Fig. 7 is a schematic flowchart of a process of a method for transmitting data according to another embodiment of the present invention.

In FIG. 7 , a scenario in which the first UE is handed over between macro base stations is taken as an example for illustration, such as the scenario shown in FIG. 1 . In this scenario, the target base station of the macro cell may implement functions of the above-mentioned first node, third node and first base station. The S-GW can realize the function of the above-mentioned second node. The target base station of the macro cell can control the S-GW through a mobile management entity (Mobile Management Entity, MME). When the first UE is located within the coverage of the source base station of the macro cell, the MME/S-GW exchanges data with the first UE through the first link. The first link is that the MME/S-GW communicates with the first UE through the source base station of the macro cell. established link.

701. The first UE sends an air interface quality measurement report to a macro cell source base station.

702. The source base station of the macro cell sends a handover request message to the target base station of the macro cell according to the air interface quality measurement report.

The macro cell source base station determines that the air interface quality measurement report satisfies the handover condition, then determines that the first UE needs to be handed over to the macro cell target base station, and therefore may send a handover request message to the target base station.

703. According to the handover request message, the target base station of the macro cell performs capability polling on the second UE served by it.

Specifically, the macro cell target base station may send a second capability polling message to the second UE, where the second capability polling message is used to instruct the second UE to report capability information.

The second UE can send its capability information to the target base station of the macro cell. The capability information of the second UE can include: whether it has the capability of direct connection communication with other UEs, the supported modes of direct connection communication with other UEs, direct connection Communication parameter configuration, UE identification, remaining energy consumption, current service type and service priority, etc.

704. The target base station of the macro cell determines the target base station itself as the auxiliary base station and the second UE as the auxiliary UE according to the basic information of the first UE, the capability information of the second UE, and the capability information of the target base station itself.

705. The target base station of the macro cell sends the first notification message to the MME/S-GW, and sends the second notification message to the second UE.

Both the first notification message and the second notification message may be used to indicate establishment of the second link, and may carry related configuration parameters for establishing the second link.

706. The MME/S-GW establishes a second link between the target base station of the macro cell and the second UE and the first UE.

707. The MME/S-GW exchanges data with the first UE through the second link.

The target base station of the macro cell can control the data bearing capability of the first link to be transferred to the second link once or successively according to the air interface measurement information. The air interface measurement information may include channel measurement conditions, air interface quality measurement reports, and the like.

708. In a case where all the data bearing capacity of the first link is transferred to the second link, the target base station of the macro cell sends a handover request response message to the source base station of the macro cell.

709. Perform handover reconfiguration among the macro cell source base station, the macro cell target base station, and the first UE.

The first UE may establish a third link between the target base station of the macro cell and the MME/S-GW.

710. The MME/S-GW exchanges data with the first UE through the third link.

The target base station of the macro cell can control the data bearing capability of the second link to be transferred to the third link once or successively according to the air interface measurement information.

711. In the case where all the data bearing capacity of the second link is transferred to the third link, the target base station of the macro cell sends a third notification message to the MME/S-GW and the second UE, where the third notification message is used to indicate the release second link.

In the embodiment of the present invention, when the second node exchanges data with the first UE through the first link, the first node notifies the second node, the second UE, and the first base station to which the second UE belongs to establish the second node. Link, so that the second node can exchange data with the first UE through the second link, and the first link is the link established between the second node and the first UE through the source base station of the first UE, so it can ensure During the handover process of the UE from the source base station to the target base station, data transmission is not interrupted, thereby improving user experience.

Fig. 8 is a schematic flowchart of a process of a method for transmitting data according to another embodiment of the present invention.

In FIG. 8 , a scene of handover of the first UE between micro base stations will be taken as an example for illustration, such as the scene in FIG. 2 . In this scenario, the macro cell base station may implement functions of the first node, the second node, and the first base station, and the micro cell target base station may implement the function of the third node. When the first UE is located within the coverage of the source base station of the micro cell, the base station of the macro cell exchanges data with the first UE through the first link. The first link is a link established between the base station of the macro cell and the first UE through the source base station of the micro cell .

801. The first UE sends an air interface quality measurement report to a micro cell source base station.

802. The source base station of the micro cell sends a handover request message to the target base station of the micro cell according to the air interface quality measurement report.

803. The micro cell target base station sends an offload request message to the macro cell base station according to the handover request message, where the offload request message is used to indicate that the first UE needs to be handed over from the micro cell source base station to the micro cell target base station and requests to offload the first link .

The offload request message may carry basic information of the first UE.

804. According to the offload request message, the macro cell base station performs capability polling on the second UE it serves.

The macro cell base station may send a second capability polling message to the second UE, where the second capability polling message is used to instruct the second UE to report capability information, and the second UE may send its capability information to the macro cell base station.

805. The macro cell base station determines itself as the assisting base station and the second UE as the assisting UE according to the basic information of the first UE, the capability information of the second UE, and its own capability information.

806. The macro cell base station sends a first notification message to the second UE.

The first notification message may be used to indicate the establishment of the second link, and may carry related configuration parameters for establishing the second link.

807. The macro cell base station establishes a second link between the second UE and the first UE.

808. The macro cell base station exchanges data with the first UE through the second link.

The macro cell base station may control the data bearing capability of the first link to be transferred to the second link once or successively according to the air interface measurement information. The air interface measurement information may include channel measurement conditions, air interface quality measurement reports, and the like.

809. The macro cell base station sends an offload response message to the micro cell target base station, where the offload response message is used to indicate that the second link is successfully established.

810. In a case where all the data bearing capacity of the first link is transferred to the second link, the target base station of the micro cell sends a handover request response message to the source base station of the micro cell.

811. Perform handover reconfiguration among the micro cell source base station, the micro cell target base station, and the first UE.

The first UE may establish a third link between the target base station of the micro cell and the base station of the macro cell.

812. The macro cell base station exchanges data with the first UE through the third link.

813. In a case where all the data bearing capabilities of the second link are transferred to the third link, the macro cell base station sends a second notification message to the second UE, where the second notification message is used to indicate to release the second link.

In the embodiment of the present invention, when the second node exchanges data with the first UE through the first link, the first node notifies the second node, the second UE, and the first base station to which the second UE belongs to establish the second node. Link, so that the second node can exchange data with the first UE through the second link, and the first link is the link established between the second node and the first UE through the source base station of the first UE, so it can ensure During the handover process of the UE from the source base station to the target base station, data transmission is not interrupted, thereby improving user experience.

Fig. 9 is a schematic block diagram of a communication node according to one embodiment of the present invention. The node 900 in FIG. 9 is the above-mentioned first node, and may perform operations of the above-mentioned first node. The node 900 includes a determining unit 910 and a sending unit 920 .

The determining unit 910 determines the m second UEs and the n UEs to which the m second UEs belong when the second node exchanges data with the first UE through the first link and the first UE needs to be handed over from the source base station to the target base station. The first base station, the first link is a link established between the second node and the first UE through the source base station, and both m and n are positive integers. The sending unit 920 notifies the n first base stations, the m second UEs, and the second node to establish m second links, so that the second node passes through the n first base stations, the m second UEs, and the first UE. Establish m second links between them, and exchange data with the first UE through the m second links respectively.

In the embodiment of the present invention, when the second node exchanges data with the first UE through the first link, the first node sends the second node, the m second UEs, and the nth UEs to which the m second UEs belong A base station notifies the establishment of m second links, so that the second node can exchange data with the first UE through the m second links, and the first link is the second node and the first UE through the source base station of the first UE Therefore, it can ensure that the data transmission is not interrupted during the handover process of the UE from the source base station to the target base station, thereby improving user experience.

Optionally, as an embodiment, the m second links are composed of m first sub-links between the second node and n first base stations, and connections between n first base stations and m second UEs. m second sub-links and m third sub-links between m second UEs and the first UE, wherein m first sub-links, m second sub-links and m third sub-links Sublinks are in one-to-one correspondence.

Optionally, as another embodiment, the determining unit 910 may obtain the basic information of the first UE, and obtain the capability information of each first base station among the k first base stations and the capability information of each of the p second UEs. capability information, k is a positive integer greater than or equal to n, p is a positive integer greater than or equal to m, and may be based on the basic information of the first UE, the capability information of each first base station in the k first base stations, and p For the capability information of each of the second UEs, m second UEs are selected from p second UEs, and n first base stations to which the m second UEs belong are selected from k first base stations.

Among them, k first base stations serve p second UEs, k first base stations and p second UEs are managed by the first node, and the basic information of the first UE is used to indicate the data bearing capacity of the first UE and the The direct communication capability supported by a UE with other UEs, the capability information of each first base station among the k first base stations is used to indicate the data bearing capability of each first base station, and each of the p second UEs The capability information of each second UE is used to indicate the bearing capability of each second UE for services other than its own service.

Optionally, as another embodiment, the determining unit 910 may also determine the data carrying ratio of each of the m second links according to the capability information of each of the m second UEs. The sending unit 920 may also send first indication information to the second node and the n first base stations respectively, where the first indication information is used to indicate the data carrying ratio of each second link.

Optionally, as another embodiment, the node 900 may further include a receiving unit 930 . The sending unit 920 may also send the first capability round to the k first base stations respectively before acquiring the capability information of each of the k first base stations and the capability information of each of the p second UEs. and send a second capability polling message to p second UEs respectively, the first capability polling message is used to indicate the capability information of the first base station to be reported, and the second capability polling message is used to indicate to report the capability information of the second UE capability information.

The determining unit 910 may receive capability information of each first base station in the k base stations and receive capability information of each second UE in the p second UEs through the receiving unit 930 .

Optionally, as another embodiment, the determining unit 910 may acquire the basic information of the first UE from the source base station.

Optionally, as another embodiment, the sending unit 920 may also send second indication information to the source base station, where the second indication information is used to indicate modification of the data bearing ratio of the first link.

Optionally, as another embodiment, the determining unit 910 may determine m second UEs and n first base stations according to an offload request message received from the third node, where the offload request message is used to indicate that the first UE needs to offload The source base station is handed over to the target base station and the first link needs to be offloaded.

Optionally, as another embodiment, the sending unit 920 may also send third indication information to the second node, where the third indication information is used to instruct the second node to exchange data with the first UE through a third link, where the first The third link is a link established between the second node and the first UE through the target base station of the first UE, and the third link is that the data carrying capacity of the first link is transferred to m second links and the first established when the link is released.

Optionally, as another embodiment, the sending unit 920 may also send data to the second node, n The first base stations and the m second UEs send fourth indication information, where the fourth indication information is used to indicate to release the m second links.

For other functions and operations of the node 900, reference may be made to the processes involving the first node in the above method embodiments in FIGS. 3 to 8 , and details are not repeated here to avoid repetition.

Fig. 10 is a schematic block diagram of a communication node according to another embodiment of the present invention. The node 1000 in FIG. 10 is the above-mentioned second node, and can perform operations of the above-mentioned second node. The node 1000 includes an establishment unit 1010 and an interaction unit 1020 .

The establishing unit 1010 may establish m A second link, where the first link is a link established between the second node and the first UE through the source base station of the first UE, and both m and n are positive integers. The exchanging unit 1020 may exchange data with the first UE through the m second links respectively.

In the embodiment of the present invention, when the second node exchanges data with the first UE through the first link, m second links are established with the first UE through n first base stations and m second UEs, and Exchanging data with the first UE through m second links respectively, and the first link is a link established between the second node and the first UE through the source base station of the first UE, so it can be guaranteed that the source base station of the UE Data transmission during handover to the target base station is not interrupted, thereby improving user experience.

Optionally, as an embodiment, the m second links are composed of m first sub-links between the second node and n first base stations, and connections between n first base stations and m second UEs. m second sub-links and m third sub-links between m second UEs and the first UE, wherein m first sub-links, m second sub-links and m third sub-links Sublinks are in one-to-one correspondence.

Optionally, as another embodiment, a receiving unit 1030 is further included.

The receiving unit 1030 may receive first indication information from the first node, where the first indication information is used to indicate the data carrying ratio of each second link in the m second links.

The interaction unit 1020 may exchange data with the first UE through the m second links respectively according to the data carrying ratio of each second link in the m second links.

Optionally, as another embodiment, the receiving unit 1030 may receive third indication information from the first node, where the third indication information is used to instruct the second node to exchange data with the first UE through a third link, where the third The link is a link established between the second node and the first UE through the target base station of the first UE, the data carrying capacity of the third link in the first link is transferred to m second links, and the first link was built in case of release.

The exchanging unit 1020 may exchange data with the first UE through the third link according to the third indication information.

Optionally, as another embodiment, the node 1000 may further include a releasing unit 1040 .

The receiving unit 1030 may also receive fourth indication information from the first node, where the fourth indication information is used to indicate the release of m second links, and the fourth indication information is that each second link in the m second links of the first node Sent when the data carrying capacity of the link is transferred to a third link.

The releasing unit 1040 may separately negotiate with the n first base stations according to the fourth indication information, so as to release the m first sublinks.

For other functions and operations of the node 1000, reference may be made to the process involving the second node in the above method embodiments in FIGS. 4 to 8 , and details are not repeated here to avoid repetition.

Fig. 11 is a schematic block diagram of a base station according to an embodiment of the present invention. The base station 1100 in FIG. 11 is the above-mentioned first base station, and can perform operations of the above-mentioned first base station. The base station 1100 includes a receiving unit 1110 , a sending unit 1120 and an establishing unit 1130 .

The receiving unit 1110 receives a first capability polling message from the first node, where the first capability polling message is used to indicate to report the capability information of the base station, and the capability information of the base station is used to indicate the data bearing capability of the base station. The sending unit 1120 sends the capability information of the first base station to the first node according to the first capability polling message. The receiving unit 1110 receives a notification message sent by the first node according to the capability information of the base station, the notification message is used to instruct the base station to establish a first sub-link with a second node and establish a second sub-link with a second UE, wherein the second UE is established by Base station control. The establishing unit 1130 establishes a first sublink with the second node according to the notification message sent by the first node, and establishes a second sublink with the second UE, so that the second link between the second node and the first UE can be established , and exchange data through the second link, where the second link is composed of the first sublink, the second sublink, and the third sublink between the second UE and the first UE.

In the embodiment of the present invention, the first base station establishes the first sublink with the second node according to the notification message of the first node, and establishes the second sublink with the second UE, so that the connection between the second node and the first UE Establish a second link between the UEs, and exchange data through the second link, so it can ensure that the data transmission is not interrupted during the handover process of the UE from the source base station to the target base station, thereby improving user experience.

Optionally, as an embodiment, the receiving unit 1110 may also receive first indication information from the first node, where the first indication information is used to indicate the data carrying ratio of the second link.

For other functions and operations of the base station 1100, reference may be made to the process involving the first base station in the above method embodiments in FIG. 3 to FIG.

Fig. 12 is a schematic block diagram of a communication node according to another embodiment of the present invention. The node 1200 in FIG. 12 is the above-mentioned first node, and can perform operations of the first node. Node 1200 includes a processor 1210 and a transmitter 1220 .

The processor 1210 determines m second UEs and n UEs to which the m second UEs belong when the second node exchanges data with the first UE through the first link and the first UE needs to be handed over from the source base station to the target base station. The first base station, the first link is a link established between the second node and the first UE through the source base station, and both m and n are positive integers. The transmitter 1220 notifies the n first base stations, the m second UEs, and the second node to establish m second links, so that the second node passes through the n first base stations, the m second UEs, and the first UE Establish m second links between them, and exchange data with the first UE through the m second links respectively.

In the embodiment of the present invention, when the second node exchanges data with the first UE through the first link, the first node sends the second node, the m second UEs, and the nth UEs to which the m second UEs belong A base station notifies the establishment of m second links, so that the second node can exchange data with the first UE through the m second links, and the first link is the second node and the first UE through the source base station of the first UE Therefore, it can ensure that the data transmission is not interrupted during the handover process of the UE from the source base station to the target base station, thereby improving user experience.

Optionally, as an embodiment, the m second links are composed of m first sub-links between the second node and n first base stations, and connections between n first base stations and m second UEs. m second sub-links and m third sub-links between m second UEs and the first UE, wherein m first sub-links, m second sub-links and m third sub-links Sublinks are in one-to-one correspondence.

Optionally, as another embodiment, the processor 1210 may obtain the basic information of the first UE, and obtain the capability information of each first base station among the k first base stations and the capability information of each of the p second UEs capability information, k is a positive integer greater than or equal to n, p is a positive integer greater than or equal to m, and may be based on the basic information of the first UE, the capability information of each first base station in the k first base stations, and p For the capability information of each of the second UEs, m second UEs are selected from p second UEs, and n first base stations to which the m second UEs belong are selected from k first base stations.

Among them, k first base stations serve p second UEs, k first base stations and p second UEs are managed by the first node, and the basic information of the first UE is used to indicate the data bearing capacity of the first UE and the The direct communication capability supported by a UE with other UEs, the capability information of each first base station among the k first base stations is used to indicate the data bearing capability of each first base station, and each of the p second UEs The capability information of each second UE is used to indicate the bearing capability of each second UE for services other than its own service.

Optionally, as another embodiment, the processor 1210 may also determine, according to the capability information of each of the m second UEs, the data carrying ratio of each of the m second links. The transmitter 1120 may also send first indication information to the second node and the n first base stations respectively, where the first indication information is used to indicate the data bearing ratio of each second link.

Optionally, as another embodiment, the node 1200 may further include a receiver 1230 . The transmitter 1220 may also send the first capability round to the k first base stations respectively before acquiring the capability information of each of the k first base stations and the capability information of each of the p second UEs. and send a second capability polling message to p second UEs respectively, the first capability polling message is used to indicate the capability information of the first base station to be reported, and the second capability polling message is used to indicate to report the capability information of the second UE capability information.

The processor 1210 may use the receiver 1230 to receive capability information of each first base station in the k base stations, and receive capability information of each second UE in the p second UEs.

Optionally, as another embodiment, the processor 1210 may acquire the basic information of the first UE from the source base station.

Optionally, as another embodiment, the transmitter 1220 may also send second indication information to the source base station, where the second indication information is used to indicate modification of the data bearing ratio of the first link.

Optionally, as another embodiment, the processor 1210 may determine m second UEs and n first base stations according to an offload request message received from the third node, where the offload request message is used to indicate that the first UE needs to offload The source base station is handed over to the target base station and the first link needs to be offloaded.

Optionally, as another embodiment, the transmitter 1220 may also send third indication information to the second node, where the third indication information is used to instruct the second node to exchange data with the first UE through a third link, where the first The third link is a link established between the second node and the first UE through the target base station of the first UE, and the third link is that the data carrying capacity of the first link is transferred to m second links and the first established when the link is released.

Optionally, as another embodiment, the sender 1220 may also send data to the second node, n The first base stations and the m second UEs send fourth indication information, where the fourth indication information is used to indicate to release the m second links.

For other functions and operations of node 1200, reference may be made to the process involving the first node in the above method embodiments shown in FIG. 3 to FIG. 8 , and details are not repeated here to avoid repetition.

Fig. 13 is a schematic block diagram of a communication node according to another embodiment of the present invention. The node 1300 in FIG. 13 is the above-mentioned second node, and can perform operations of the second node. Node 1300 includes a processor 1310 and a transceiver 1320 .

The processor 1310 may establish an m link with the first UE through n first base stations and m second UEs when exchanging data with the first UE through the first link and the first UE needs to be handed over from the source base station to the target base station. A second link, where the first link is a link established between the second node and the first UE through the source base station of the first UE, and both m and n are positive integers. The transceiver 1320 may exchange data with the first UE through the m second links respectively.

In the embodiment of the present invention, when the second node exchanges data with the first UE through the first link, m second links are established with the first UE through n first base stations and m second UEs, and Exchanging data with the first UE through m second links respectively, and the first link is a link established between the second node and the first UE through the source base station of the first UE, so it can be guaranteed that the source base station of the UE Data transmission during handover to the target base station is not interrupted, thereby improving user experience.

Optionally, as an embodiment, the m second links are composed of m first sub-links between the second node and n first base stations, and connections between n first base stations and m second UEs. m second sub-links and m third sub-links between m second UEs and the first UE, wherein m first sub-links, m second sub-links and m third sub-links Sublinks are in one-to-one correspondence.

Optionally, as another embodiment, the transceiver 1320 may receive first indication information from the first node, where the first indication information is used to indicate the data carrying ratio of each second link in the m second links.

The transceiver 1320 may exchange data with the first UE through the m second links respectively according to the data bearing ratio of each second link in the m second links.

Optionally, as another embodiment, the transceiver 1320 may receive third indication information from the first node, where the third indication information is used to instruct the second node to exchange data with the first UE through a third link, where the third The link is a link established between the second node and the first UE through the target base station of the first UE, the data carrying capacity of the third link in the first link is transferred to m second links, and the first link was built in case of release.

The transceiver 1320 may exchange data with the first UE through the third link according to the third indication information.

Optionally, as another embodiment, the transceiver 1320 may also receive fourth indication information from the first node, where the fourth indication information is used to indicate the release of m second links, and the fourth indication information is that the first node is at m It is sent under the condition that the data carrying capacity of each second link among the second links is transferred to the third link.

The processor 1310 may separately negotiate with the n first base stations according to the fourth indication information, so as to release the m first sub-links.

For other functions and operations of the node 1300, reference may be made to the processes involving the second node in the above method embodiments in FIGS. 3 to 8 , and details are not repeated here to avoid repetition.

Fig. 14 is a schematic block diagram of a base station according to another embodiment of the present invention. The base station 1400 in FIG. 14 is the above-mentioned first base station, and may perform operations of the above-mentioned first base station. The base station 1400 includes a receiver 1410 , a transmitter 1420 and a processor 1430 .

The receiver 1410 receives a first capability polling message from the first node, where the first capability polling message is used to indicate to report the capability information of the base station, and the capability information of the base station is used to indicate the data bearing capability of the base station. The transmitter 1420 sends the capability information of the first base station to the first node according to the first capability polling message. The receiver 1410 receives a notification message sent by the first node according to the capability information of the base station, the notification message is used to instruct the base station to establish the first sub-link with the second node and establish the second sub-link with the second UE, wherein the second UE is established by Base station control. The processor 1430 establishes the first sublink with the second node according to the notification message sent by the first node, and establishes the second sublink with the second UE, so that the second link between the second node and the first UE can be established , and exchange data through the second link, where the second link is composed of the first sublink, the second sublink, and the third sublink between the second UE and the first UE.

In the embodiment of the present invention, the first base station establishes the first sublink with the second node according to the notification message of the first node, and establishes the second sublink with the second UE, so that the connection between the second node and the first UE Establish a second link between the UEs, and exchange data through the second link, so it can ensure that the data transmission is not interrupted during the handover process of the UE from the source base station to the target base station, thereby improving user experience.

Optionally, as an embodiment, the receiver 1410 may also receive first indication information from the first node, where the first indication information is used to indicate the data carrying ratio of the second link.

For other functions and operations of the base station 1400, refer to the process involving the first base station in the above method embodiments in FIG. 3 to FIG. 8 , and details are not repeated here to avoid retransmission.

Those skilled in the art can appreciate that the units and algorithm steps of the examples described in conjunction with the embodiments disclosed herein can be implemented by electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are executed by hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art may use different methods to implement the described functions for each specific application, but such implementation should not be regarded as exceeding the scope of the present invention.

Those skilled in the art can clearly understand that for the convenience and brevity of the description, the specific working process of the above-described system, device and unit can refer to the corresponding process in the foregoing method embodiment, which will not be repeated here.

In the several embodiments provided in this application, it should be understood that the disclosed systems, devices and methods may be implemented in other ways. For example, the device embodiments described above are only illustrative. For example, the division of the units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components can be combined or May be integrated into another system, or some features may be ignored, or not implemented. In another point, the mutual coupling or direct coupling or communication connection shown or discussed may be through some interfaces, and the indirect coupling or communication connection of devices or units may be in electrical, mechanical or other forms.

The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place, or may be distributed to multiple network units. Part or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, each unit may exist separately physically, or two or more units may be integrated into one unit.

If the functions described above are realized in the form of software function units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the essence of the technical solution of the present invention or the part that contributes to the prior art or the part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including Several instructions are used to make a computer device (which may be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the methods described in various embodiments of the present invention. The aforementioned storage media include: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), magnetic disk or optical disk and other media that can store program codes. .

The above is only a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Anyone skilled in the art can easily think of changes or substitutions within the technical scope disclosed in the present invention. Should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be determined by the protection scope of the claims.

Claims (36)

1. transmit a method for data, it is characterized in that, comprising:

First node when Section Point by the first link and a UE interaction data and a described UE needs to switch to target BS from source base station, determine m the 2nd UE and described m n the first base station belonging to the 2nd UE, described first link is the link of described Section Point by setting up between described source base station and a described UE, m and n is positive integer;

Described first node sets up m article of the second link respectively to described n the first base station, described m the 2nd UE and described Section Point notice, so that described Section Point sets up m article of the second link by described n the first base station, described m between the 2nd UE and a described UE, and respectively by described m article of the second link and a described UE interaction data.

2. method according to claim 1, it is characterized in that, described m article of the second link is made up of m article of the first sublink between described Section Point and described n the first base station, m article of the second sublink between described n the first base station and described m the 2nd UE and described m m article of the 3rd sublink between the 2nd UE and a described UE respectively, and wherein said m article of the first sublink, described m article the second sublink and described m article of the 3rd sublink are one to one.

3. method according to claim 1 and 2, is characterized in that, describedly determines m the 2nd UE and described m n the first base station belonging to the 2nd UE, comprising:

Described first node obtains the essential information of a described UE, and obtain the ability information of each 2nd UE in the ability information of each first base station in k the first base station and p the 2nd UE, k is the positive integer being more than or equal to n, and p is the positive integer being more than or equal to m;

Described first node is according to the ability information of each 2nd UE in the ability information of each first base station in the essential information of a described UE, described k the first base station and described p the 2nd UE, m the 2nd UE is selected from described p the 2nd UE, and from described k the first base station, select n the first base station belonging to described m the 2nd UE

Wherein, described k the first base station is described p the 2nd UE service, described k the first base station and described p the 2nd UE are controlled by described first node, the essential information of a described UE is used to indicate that the data carrying capabilities of a described UE and a described UE support and between other UE direct-connected communication capacity, in described k the first base station, the ability information of each first base station is used to indicate the data carrying capabilities of described each first base station, in described p the 2nd UE, the ability information of each 2nd UE is used to indicate described each 2nd UE to the bearing capacity of the business except own service.

4. method according to claim 3, is characterized in that, also comprises:

Described first node, according to the ability information of each 2nd UE in described m the 2nd UE, determines the Deta bearer ratio of every bar second link in described m bar second link;

Described first node sends the first indication information respectively to described Section Point and described n the first base station, and wherein said first indication information is used to indicate the Deta bearer ratio of described every bar second link.

5. the method according to claim 3 or 4, is characterized in that, in described acquisition k the first base station in the ability information of each first base station and p the 2nd UE each 2nd UE ability information before, comprising:

Described first node sends the first ability polling message respectively to described k the first base station, and send the second ability polling message respectively to described p the 2nd UE, described the first ability polling message is used to indicate the ability information reporting described first base station, and described the second ability polling message is used to indicate the ability information reporting described 2nd UE;

The ability information of each 2nd UE in the ability information of each first base station and individual 2nd UE of p in k base station described in described acquisition k the first base station, comprising:

Described first node receives the ability information of each first base station in a described k base station, and receives the ability information of each 2nd UE in described p the 2nd UE.

6. the method according to any one of claim 3 to 5, is characterized in that,

The ability information of described each first base station comprises following at least one: current loads, surplus resources;

The ability information of described each 2nd UE comprises: whether have the ability of carrying out direct-connected communication with other UE, and that can support carries out the pattern of direct-connected communication with other UE described, the parameter configuration of direct-connected communication and UE mark.

7. the method according to any one of claim 3 to 6, is characterized in that, described first node obtains the essential information of a described UE, comprising:

Described first node obtains the essential information of a described UE from described source base station.

8. the method according to any one of claim 2 to 7, it is characterized in that, the essential information of a described UE comprises the essential information of the transfer of data of a described UE and the direct-connected communication information of a described UE, and what the described direct-connected communication information comprised that a described UE can support carries out the pattern of direct-connected communication with other UE.

9. method according to any one of claim 1 to 8, is characterized in that, also comprises:

Described first node sends the second indication information to described source base station, and described second indication information is used to indicate the Deta bearer ratio revising described first link.

10. method according to any one of claim 1 to 9, is characterized in that, described first node determines m the 2nd UE and described m n the first base station belonging to the 2nd UE, comprising:

Described first node is according to the shunting request message received from the 3rd node, determine m the 2nd UE and described n the first base station, wherein said shunting request message is used to indicate a described UE to be needed be switched to described target BS from described source base station and need to shunt described first link.

11. methods according to any one of claim 1 to 10, is characterized in that, also comprise:

Described first node sends the 3rd indication information to described Section Point, described 3rd indication information is used to indicate described Section Point by the 3rd link and a described UE interaction data, wherein, described 3rd link is described Section Point by the link set up between the target BS of a described UE and a described UE, and described 3rd link is transferred to described m article of the second link at the data carrying capabilities of described first link and sets up in the d/d situation of described first link.

12. methods according to claim 11, is characterized in that, also comprise:

In described m article of the second link, the data carrying capabilities of every article the second link is transferred to described 3rd link, described first node sends the 4th indication information respectively to described Section Point, described n the first base station and described m the 2nd UE, and described 4th indication information is used to indicate release described m article of the second link.

13. 1 kinds of methods transmitting data, is characterized in that, comprising:

Section Point when by the first link and a UE interaction data and a described UE needs to switch to target BS from source base station, m article of the second link is set up by n the first base station and m a 2nd UE and described UE, wherein, described first link is the link of described Section Point by setting up between described source base station and a described UE, m and n is positive integer;

Described Section Point is respectively by described m article of the second link and a described UE interaction data.

14. methods according to claim 13, it is characterized in that, m article of the first sublink between Section Point described in described m article of the second chain route and described n the first base station, m article of the second sublink between described n the first base station and described m the 2nd UE and described m m article of the 3rd sublink between the 2nd UE and a described UE form, and wherein said m article of the first sublink, described m article the second sublink and described m article of the 3rd sublink are one to one.

15. methods according to claim 13 or 14, is characterized in that, also comprise:

Described Section Point receives the first indication information from first node, and described first indication information is used to indicate the Deta bearer ratio of every bar second link in described m bar second link;

Described Section Point, respectively by described m article of the second link and a described UE interaction data, comprising:

Described Section Point according to the Deta bearer ratio of bar second link every in described m bar second link, respectively by described m article of the second link and a described UE interaction data.

16. methods according to claim 14, is characterized in that, also comprise:

Described Section Point receives the 3rd indication information from described first node, described 3rd indication information is used to indicate described Section Point by the 3rd link and a described UE interaction data, wherein, described 3rd link is described Section Point by the link set up between the target BS of a described UE and a described UE, and described 3rd link is transferred to described m article of the second link at the data carrying capabilities of described first link and sets up in the d/d situation of described first link;

Described Section Point according to described 3rd indication information, by described 3rd link and a described UE interaction data.

17. methods according to claim 16, is characterized in that, also comprise:

Described Section Point receives the 4th indication information from described first node, described 4th indication information is used to indicate release described m article of the second link, and described 4th indication information is that the data carrying capabilities of described first node every article second link in described m article of the second link sends when being transferred to described 3rd link;

Described Section Point, according to described 4th indication information, is consulted with described n the first base station, to discharge described m bar first sublink respectively.

18. 1 kinds of methods transmitting data, is characterized in that, comprising:

First base station receives the first ability polling message from first node, and described the first ability polling message is used to indicate the ability information reporting described first base station, and the ability information of described first base station is used to indicate the data carrying capabilities of described first base station;

Described first base station, according to described the first ability polling message, sends the ability information of described first base station to described first node;

Described first base station receives the notification message that described first node sends according to the ability information of described first base station, described notification message is used to indicate described first base station and Section Point is set up the first sublink and set up the second sublink with the 2nd UE, and wherein said 2nd UE is controlled by described first base station;

The notification message that described first base station sends according to described first node, the first sublink is set up with described Section Point, and set up the second sublink with the 2nd UE, to set up the second link between described Section Point and a UE, and by described second link interaction data, described in wherein said second chain route, the first sublink, described second sublink and the 3rd sublink between described 2nd UE and a described UE form.

19. methods according to claim 18, is characterized in that, also comprise:

Described first base station receives the first indication information from described first node, and described first indication information is used to indicate the Deta bearer ratio of described second link.

20. 1 kinds of communication nodes, is characterized in that, comprising:

Determining unit, for when Section Point by the first link and a UE interaction data and a described UE needs to switch to target BS from source base station, determine m the 2nd UE and described m n the first base station belonging to the 2nd UE, described first link is the link of described Section Point by setting up between described source base station and a described UE, m and n is positive integer;

Transmitting element, for setting up m article of the second link respectively to described n the first base station, described m the 2nd UE and described Section Point notice, so that described Section Point sets up m article of the second link by described n the first base station, described m between the 2nd UE and a described UE, and respectively by described m article of the second link and a described UE interaction data.

21. nodes according to claim 20, it is characterized in that, m article of the first sublink between Section Point described in described m article of the second chain route and described n the first base station, m article of the second sublink between described n the first base station and described m the 2nd UE and described m m article of the 3rd sublink between the 2nd UE and a described UE form, and wherein said m article of the first sublink, described m article the second sublink and described m article of the 3rd sublink are one to one.

22. nodes according to claim 20 or 21, it is characterized in that, described determining unit is specifically for the essential information that obtains a described UE, and obtain the ability information of each 2nd UE in the ability information of each first base station in k the first base station and p the 2nd UE, k is the positive integer being more than or equal to n, and p is the positive integer being more than or equal to m;

According to the ability information of each 2nd UE in the ability information of each first base station in the essential information of a described UE, described k the first base station and described p the 2nd UE, m the 2nd UE is selected from described p the 2nd UE, and from described k the first base station, select n the first base station belonging to described m the 2nd UE

Wherein, described k the first base station is described p the 2nd UE service, described k the first base station and described p the 2nd UE are administered by described first node, the essential information of a described UE is used to indicate that the data carrying capabilities of a described UE and a described UE support and between other UE direct-connected communication capacity, in described k the first base station, the ability information of each first base station is used to indicate the data carrying capabilities of described each first base station, in described p the 2nd UE, the ability information of each 2nd UE is used to indicate described each 2nd UE to the bearing capacity of the business except own service.

23. nodes according to claim 22, is characterized in that,

Described determining unit, also for the ability information according to each 2nd UE in described m the 2nd UE, determines the Deta bearer ratio of every bar second link in described m bar second link;

Described transmitting element, also for sending the first indication information respectively to described Section Point and described n the first base station, wherein said first indication information is used to indicate the Deta bearer ratio of described every bar second link.

24. nodes according to claim 22 or 23, is characterized in that, also comprise receiving element;

Described transmitting element, before ability information also for each 2nd UE in the ability information of each first base station in described acquisition k the first base station and p the 2nd UE, the first ability polling message is sent respectively to described k the first base station, and send the second ability polling message respectively to described p the 2nd UE, described the first ability polling message is used to indicate the ability information reporting described first base station, and described the second ability polling message is used to indicate the ability information reporting described 2nd UE;

Described determining unit specifically for being received the ability information of each first base station in a described k base station by described receiving element, and receives the ability information of each 2nd UE in described p the 2nd UE.

25. nodes according to any one of claim 22 to 24, is characterized in that, described determining unit is specifically for obtaining the essential information of a described UE from described source base station.

26. nodes according to any one of claim 20 to 25, it is characterized in that, described transmitting element, also for sending the second indication information to described source base station, described second indication information is used to indicate the Deta bearer ratio revising described first link.

27. nodes according to any one of claim 20 to 26, it is characterized in that, the shunting request message that described determining unit receives from the 3rd node specifically for basis, determine m the 2nd UE and described n the first base station, wherein said shunting request message is used to indicate a described UE to be needed be switched to target BS from described source base station and need to shunt described first link.

28. nodes according to any one of claim 20 to 27, is characterized in that,

Described transmitting element, also for sending the 3rd indication information to described Section Point, described 3rd indication information is used to indicate described Section Point by the 3rd link and a described UE interaction data, wherein, described 3rd link is described Section Point by the link set up between the target BS of a described UE and a described UE, and described 3rd link is transferred to described m article of the second link at the data carrying capabilities of described first link and sets up in the d/d situation of described first link.

29. nodes according to claim 28, is characterized in that,

Described transmitting element, when being also transferred to described 3rd link for the data carrying capabilities of article the second link every in described m article of the second link, send the 4th indication information respectively to described Section Point, described n the first base station and described m the 2nd UE, described 4th indication information is used to indicate release described m article of the second link.

30. 1 kinds of communication nodes, is characterized in that, comprising:

Set up unit, for when by the first link and a UE interaction data and a described UE needs to switch to target BS from source base station, m article of the second link is set up by n the first base station and m a 2nd UE and described UE, wherein, described first link is described Section Point by the link set up between the source base station of a described UE and a described UE, m and n is positive integer;

Interactive unit, for respectively by described m article of the second link and a described UE interaction data.

31. nodes according to claim 30, it is characterized in that, m article of the first sublink between Section Point described in described m article of the second chain route and described n the first base station, m article of the second sublink between described n the first base station and described m the 2nd UE and described m m article of the 3rd sublink between the 2nd UE and a described UE form, and wherein said m article of the first sublink, described m article the second sublink and described m article of the 3rd sublink are one to one.

32. nodes according to claim 30 or 31, is characterized in that, also comprise receiving element;

Described receiving element, for receiving the first indication information from first node, described first indication information is used to indicate the Deta bearer ratio of every bar second link in described m bar second link;

Described interactive unit, specifically for the Deta bearer ratio according to bar second link every in described m bar second link, respectively by described m article of the second link and a described UE interaction data.

33. nodes according to claim 31, is characterized in that, also comprise receiving element;

Described receiving element, for receiving the 3rd indication information from described first node, described 3rd indication information is used to indicate described Section Point by the 3rd link and a described UE interaction data, wherein, described 3rd link is described Section Point by the link set up between the target BS of a described UE and a described UE, and described 3rd link is transferred to described m article of the second link at the data carrying capabilities of described first link and sets up in the d/d situation of described first link;

Described interactive unit, specifically for according to described 3rd indication information, by described 3rd link and a described UE interaction data.

34. nodes according to claim 33, is characterized in that, also comprise releasing unit;

Described receiving element, also for receiving the 4th indication information from described first node, described 4th indication information is used to indicate release described m article of the second link, and described 4th indication information is that the data carrying capabilities of described first node every article second link in described m article of the second link sends when being transferred to described 3rd link;

Described releasing unit, for according to described 4th indication information, consults with described n the first base station, to discharge described m bar first sublink respectively.

35. 1 kinds of base stations, is characterized in that, comprising:

Receiving element, for receiving the first ability polling message from first node, described the first ability polling message is used to indicate the ability information reporting described base station, and the ability information of described base station is used to indicate the data carrying capabilities of described base station;

Transmitting element, for according to described the first ability polling message, sends the ability information of described first base station to described first node;

Described receiving element, for receiving the notification message that described first node sends according to the ability information of described base station, described notification message is used to indicate described base station and Section Point is set up the first sublink and set up the second sublink with the 2nd UE, and wherein said 2nd UE is controlled by described base station;

Set up unit, for the notification message sent according to described first node, the first sublink is set up with described Section Point, and set up the second sublink with the 2nd UE, to set up the second link between described Section Point and a UE, and by described second link interaction data, described in wherein said second chain route, the first sublink, described second sublink and the 3rd sublink between described 2nd UE and a described UE form.

36. base stations according to claim 35, is characterized in that,

Described receiving element, also for receiving the first indication information from described first node, described first indication information is used to indicate the Deta bearer ratio of described second link.