JP6208845B2 - Method and base station for determining a coordinated transmission set - Google Patents

Description

  Embodiments of the present invention relate to the field of communication technologies, and in particular, to a method and base station for determining a coordinated transmission set.

As one of Coordinated Multiple Point (CoMP) technologies, Joint Transmission (JT) technology can greatly improve the average cell edge throughput. In the prior art, when a coordinated network is deployed, the base station determines a CoMP coordinated transmission set based on the deployment and no further changes to the CoMP coordinated transmission set or user equipment (User Equipment, UE) The CoMP coordinated transmission set is determined based on the measurement information (for example, Reference Signal Received Power (RSRP), channel quality indicator (CQI), and the like) reported by.

  However, in order to obtain the gain provided by JT technology, the intermediate and radio frequency channel responses obtained after digital or analog correction for multiple cells are temporally and / or phased. To be matched, joint channel correction needs to be performed for multiple coordinated cells in JT coherent transmission. Here, the term "matching" means that the corrected intermediate frequency channel response and radio frequency channel response after transmission and / or reception are the same, or the intermediate frequency channel response after correction and intermediate reception of radio frequency channel response. It can mean that the ratios of the frequency channel response and the radio frequency channel response are the same. When the CoMP coordinated transmission set determined using the prior art is used as a plurality of coordinated cells in JT coherent transmission, the signal gain of joint transmission is low.

  Embodiments of the present invention provide a method and base station for determining a coordinated transmission set, where the method and base station perform JT coherent transmission on user equipment to improve the signal gain of joint transmission The coordinated transmission set can be determined more rationally.

  A first aspect provides a method for determining a coordinated transmission set, the method comprising: obtaining a first coordinated transmission set of a user equipment and obtaining at least one first correction set. Each of the at least one first correction set includes at least two cells, the joint channel correction is completed for any two cells in the at least two cells, and the first coordinated transmission set is user equipment Obtaining a first coordinated transmission set of user equipment, including at least one set of cells providing coordinated transmission for, obtaining at least one first correction set; and first of the user equipment Determining a second coordinated transmission set of the user equipment according to the coordinated transmission set and the at least one first correction set; and according to the second coordinated transmission set of the user equipment. Performing joint transmission (JT) coherent transmission on the user equipment.

  With respect to the first aspect, in another implementation of the first aspect, the at least one first correction set is one first correction set, the first coordinated transmission set of the user equipment and at least one Determining the second coordinated transmission set of the user equipment according to the first correction set determines the second coordinated transmission set of the user equipment according to the intersection of the first coordinated transmission set of the user equipment and the first correction set; Including the steps of:

  With respect to the first aspect or the previous implementation, in another implementation of the first aspect, the at least one first correction set is a plurality of first correction sets and the first coordinated transmission of the user equipment Determining a second coordinated transmission set of the user equipment according to the set and the at least one first correction set, determining a combination of a plurality of first correction sets as a second correction set; and Determining the intersection of the first coordinated transmission set and the second correction set as the second coordinated transmission set of the user equipment.

  With respect to the first aspect or one of the foregoing implementations, in another implementation of the first aspect, the step of obtaining at least one first correction set includes at least a service cell of the user equipment. Obtaining a first correction set.

  With respect to the first aspect or one of the aforementioned implementations, in another implementation of the first aspect, obtaining at least one first correction set comprises at least one first correction set. From a network controller, or obtaining at least one first correction set from a base station to which a reference cell that is a cell in the first coordinated transmission set of the user equipment belongs.

  With respect to the first aspect or one of the implementations described above, in another implementation of the first aspect, multiple user equipments are involved in JT coherent transmission, and the user equipment is If one, the step of performing joint transmission (JT) coherent transmission on the user equipment according to the second coordinated transmission set of the user equipment is performed according to the intersection of the second coordinated transmission sets corresponding to the plurality of user equipments. Performing joint transmission (JT) coherent transmission on the device.

  With respect to the first aspect or one of the aforementioned implementations, in another implementation of the first aspect, the first coordinated transmission set of the user equipment is a static coordinated transmission set, a quasi-static coordinated transmission Set, or dynamic coordinated transmission set.

  A second aspect provides a base station, the base station is an acquisition unit that acquires a first coordinated transmission set of a user equipment and acquires at least one first correction set, wherein the at least one first Each of the one correction set includes at least two cells, and joint channel correction is completed for any two cells in the at least two cells, and the first coordinated transmission set performs coordinated transmission for the user equipment. An acquisition unit including at least one set of cells to provide, a first coordinated transmission set of the user equipment acquired by the acquisition unit and a second coordinated transmission set of the user equipment according to the at least one first correction set; A determination unit to determine, and a transmission unit to perform joint transmission (JT) coherent transmission on the user equipment according to the second coordinated transmission set of the user equipment determined by the determination unit. .

  With respect to the second aspect, in another implementation of the second aspect, the determining unit, in particular, according to the intersection of the first coordinated transmission set and one first correction set of the user equipment acquired by the acquiring unit A second coordinated transmission set for the user equipment is determined.

  With respect to the second aspect or the above-described implementation method, in another implementation method of the second aspect, the determination unit, in particular, includes a second correction set including a plurality of first correction sets obtained by the acquisition unit. And the intersection of the first cooperative transmission set of the user equipment and the second correction set acquired by the acquisition unit is determined as the second cooperative transmission set of the user equipment.

  With respect to the second aspect or one of the implementations described above, in another implementation of the second aspect, the acquisition unit includes at least one first correction set that includes, in particular, a service cell of the user equipment. get.

  With respect to the second aspect or one of the implementations described above, in another implementation of the second aspect, the acquisition unit, in particular, acquires at least one first correction set from the network controller, or At least one first correction set is obtained from a base station to which a reference cell that is a cell in the coordinated transmission set of the user equipment belongs.

  With respect to the second aspect or one of the foregoing implementations, in another implementation of the second aspect, multiple user equipments are involved in JT coherent transmission, and the user equipment is one of the multiple user equipments In the case of one, the transmission unit particularly corresponds to a plurality of user equipments, and performs JT coherent transmission on the user equipment according to the intersection of the second cooperative transmission sets acquired by the acquisition unit.

  With respect to the second aspect or one of the aforementioned implementations, in another implementation of the second aspect, the first coordinated transmission set of the user equipment is a static coordinated transmission set, a quasi-static coordinated transmission Set, or dynamic coordinated transmission set.

  In an embodiment of the present invention, the base station not only obtains the first coordinated transmission set of the user equipment, but also when joint channel correction needs to be performed for multiple cells in JT coherent transmission. Also obtain at least one first correction set for which is completed. Thus, if JT coherent transmission is performed on the user equipment with a first cooperative transmission set of the user equipment and a second cooperative transmission set determined according to at least one first correction set, the joint transmission Signal gain is improved.

  BRIEF DESCRIPTION OF THE DRAWINGS To describe the technical solutions in the embodiments of the present invention more clearly, the following briefly describes the accompanying drawings required for describing the embodiments or the prior art. Apparently, the accompanying drawings in the following description merely show some embodiments of the present invention, and those skilled in the art can further derive other drawings from these accompanying drawings without difficulty.

4 is a flowchart of a method for determining a coordinated transmission set according to an embodiment of the present invention; 4 is a schematic flow diagram of a process of a method for determining a coordinated transmission set according to an embodiment of the invention. FIG. 3 is a structural block diagram of a base station according to an embodiment of the present invention. FIG. 6 is a structural block diagram of a base station according to another embodiment of the present invention.

  The following clearly and completely describes the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are some but not all of the embodiments of the present invention. All other embodiments obtained by persons of ordinary skill in the art based on the embodiments of the present invention without difficulty will fall within the protection scope of the present invention.

Technical solutions of the embodiments of the present invention, Global System for Mobile communications (Global System for Mobile C ommunication, GSM ( registered trademark)) system, code division multiple access (Code Division Multiple Access, CDMA) system, Wideband Code Division Multiple Connection (Wideband Code Division Multiple Access, WCDMA (registered trademark)) system, General Packet Radio Service (GPRS), Long Term Evolution (LTE) system, LTE Frequency Division Duplex (Frequency) Various communications such as Division Duplex (FDD) system, LTE Time Division Duplex (TDD), Universal Mobile Telecommunication System (UMTS), WiMAX (Worldwide Interoperability for Microwave Access, WiMAX) communication system It should be understood that it is applicable to the system.

In an embodiment of the present invention, the base station may be a base station (Base Transceiver Station, BTS) in GSM or CDMA, a base station (NodeB, NB) in WCDMA, or a base station (Base Station, BS) in UMTS. Furthermore, it can also be an evolved NodeB ( evolved Node B, eNB, or e-NodeB) in LTE, and the base station is not limited in the present invention.

The network controller can be a base station controller (Base Station Controller (BSC) in GSM or CDMA), a radio network controller (RNC) in WCDMA, or evolved NodeB ( evolved Node in LTE) B, eNB, or e-NodeB). The network controller can also be an operation & maintenance center (OMC) or the like. It should be understood that embodiments of the invention are not limited thereto.

  User equipment (User Equipment, UE), also referred to as mobile terminal, mobile user equipment, etc., communicates with one or more core networks via a radio access network (eg, RAN, Radio Access Network). be able to. The user equipment may be a mobile terminal such as a mobile phone (also called a “cellular” phone) or a computer with a mobile terminal. For example, the user equipment can be a portable mobile device, a pocket-sized mobile device, a handheld mobile device, a computer-incorporated mobile device, or an in-car mobile device that communicates language and / or data with a radio access network. .

  FIG. 1 is a flowchart of a method for determining a coordinated transmission set according to an embodiment of the present invention. The method shown in FIG. 1 is executed by a base station.

101. A first coordinated transmission set of user equipment is obtained and at least one first correction set is obtained. Each of the at least one first correction set includes at least two cells, joint channel correction is completed for any two cells in the at least two cells, and the first coordinated transmission set is for the user equipment A set of at least one cell that provides a coordinated transmission of.
102. A second coordinated transmission set of the user equipment is determined according to the first coordinated transmission set of the user equipment and at least one first correction set.

  103. Perform joint transmission (JT) coherent transmission on the user equipment according to the second coordinated transmission set of the user equipment.

  In this embodiment of the invention, the base station not only obtains the first coordinated transmission set of the user equipment, but also if joint channel correction needs to be performed for multiple cells in JT coherent transmission. Also obtain at least one first correction set for which correction is to be completed. Thus, if JT coherent transmission is performed on the user equipment with a first cooperative transmission set of the user equipment and a second cooperative transmission set determined according to at least one first correction set, the joint transmission Signal gain is improved.

  Optionally, as one embodiment, the first coordinated transmission set of the user equipment may be a static coordinated transmission set, a quasi-static coordinated transmission set, or a dynamic coordinated transmission set.

  A static coordinated transmission set means that when a collaborative network is deployed (a collaborative network can contain multiple base stations, one base station can serve multiple cells, Small cell base station or micro base station or remote radio unit (RRU), JT coherent transmission for UE (combining multiple cells to transmit data service to UE) Etc.) is determined by the base station of the serving cell of the UE, and when a plurality of cells are determined, no further changes are made. For example, a plurality of cells, Cell0 to Cell5, are deployed in the cooperative network, and the base station of the UE serving cell determines that the cells that perform JT coherent transmission for the UE are Cell0, Cell2, and Cell4, No more changes are made.

  A quasi-static coordinated transmission set means that for a UE when a coordinated network is deployed (a coordinated network can include multiple base stations, and one base station can serve multiple cells). A plurality of cells performing JT coherent transmission is determined by the base station of the serving cell of the UE according to the deployment and measurement information reported by the UE. For example, a plurality of cells, Cell0 to Cell5, are deployed in the cooperative network. In the initial stage, the base station of the UE serving cell (Cell1) determines that the cells that perform JT coherent transmission are Cell0, Cell2, and Cell4 for the UE. At a certain time, the UE reports measurement information to the base station, and the base station determines that the cells are Cell2, Cell3, and Cell5 according to the measurement information reported by the UE. At this point, the base station can select Cell2, Cell3, and Cell5 to perform JT coherent transmission for the UE. Undoubtedly, the base station can also determine a cell for JT coherent transmission in polling mode. For example, first, the base station determines that JT coherent transmission for the UE is performed using Cell0, Cell1, and Cell2, and after a period of time, the base station uses Cell3, Cell4, and Cell5. Then, it is determined that JT coherent transmission for the UE is performed.

  The static cooperative transmission set of all UEs in the same service cell can be the same, or the quasi-static cooperative transmission set of all UEs in the same service cell can be the same.

  A dynamic coordinated transmission set means that a base station determines a plurality of cells performing JT coherent transmission for a UE according to measurement information reported by the UE, that is, a plurality of UEs performing JT coherent transmission. This refers to determining a cell. For example, a plurality of cells, Cell0 to Cell5, are deployed in a cooperative network, and the base station can measure information reported by the UE (for example, the difference between the RSRP of the serving cell and the RSRP of neighboring cells reported by the UE). Is determined to be Cell2, Cell4, and Cell5 for JT coherent transmission for the UE. The coordinated transmission set may vary according to measurement information reported by various UEs.

  Measurement information reported by the UE includes reference signal received power (RSRP), reference signal received quality (RSRQ), channel quality information (Channel Quality Indicator, CQI), and signal-to-interference noise. At least one of a ratio (Signal to Interference plus Noise Ratio (SINR)), a block error rate (BLER), and the like may be included. It should be understood that this embodiment of the invention is not limited to these.

  In this embodiment of the invention, the base station not only obtains the first coordinated transmission set of the user equipment, but also if joint channel correction needs to be performed for multiple cells in JT coherent transmission. Also obtain at least one first correction set for which correction is to be completed. Thus, if JT coherent transmission is performed on the user equipment with a first cooperative transmission set of the user equipment and a second cooperative transmission set determined according to at least one first correction set, the joint transmission Signal gain is improved.

  Optionally, as another embodiment, prior to step 101, if a collaborative network is deployed, base stations in the collaborative network can obtain a collaborative set from the network controller. In step 101, when the base station determines a plurality of cells to perform JT coherent transmission for the user equipment, the base station determines the first cooperative transmission set of the user equipment from among the cooperation sets obtained from the network controller. You can choose. The first cooperative transmission set is a subset of the cooperative set.

  Optionally, as another embodiment, at step 101, the base station of the serving cell of the user equipment may obtain at least one first correction set from the network controller, and at least one first correction set. Can be obtained from the base station to which the reference cell that is a cell in the first coordinated transmission set of the user equipment belongs, and this is not limited in the present embodiment of the present invention. Specifically, after any two cells in the plurality of cells belonging to the base station complete the joint channel correction, the base station determines the plurality of cells as the first correction set, and the first cell The correction set can be sent to the network controller. Preferably, if the base station is not a reference cell base station, the first correction set is sent to the reference cell base station in the cooperative network. Latency is reduced if the base station only needs to obtain the first correction set from the base station of the reference cell rather than from the network controller. It should be noted that cells belonging to different base stations can also perform joint channel correction, which is not limited in this embodiment of the present invention.

  Optionally, the at least one first correction set can also be obtained using a dedicated interface, i.e. an interface defined by the base station (e.g. in a scenario where the baseband board supports multiple cells). . It should be noted that the at least one first correction set can also be obtained using another interface (such as an X2 interface), which is not limited in this embodiment of the invention.

  Optionally, as another embodiment, at step 101, at least one first correction set including a service cell of a user equipment is obtained.

  Optionally, as another embodiment, if only one first correction set is acquired, at step 102, the intersection of the first coordinated transmission set of the user equipment and the one first correction set Can be determined as the second coordinated transmission set of the user equipment. When there are a plurality of first correction sets to be acquired, in step 102, a knot of the plurality of first correction sets can be determined as the second correction set, specifically, the plurality of first correction sets. Each of the correction sets includes a service cell of the user equipment, and the intersection of the first coordinated transmission set and the second correction set of the user equipment is determined as the second coordinated transmission set of the user equipment.

  This embodiment of the present invention limits how the second coordinated transmission set of the user equipment is determined according to the first coordinated transmission set of the user equipment and one or more first correction sets. It should be understood that there is no provision.

  Optionally, as another embodiment, if multiple user equipments are involved in JT coherent transmission (also referred to as “Multi-User Joint Transmission (MU-JT)”), the second of the user equipments Cooperative sets can also be determined one by one using the method according to the previous embodiment of the invention. At step 102, JT coherent transmission is performed on any user equipment in the plurality of user equipments according to the intersection of the second cooperative set corresponding to the user equipment. That is, the intersection of the second cooperative set of user equipments involved in MU-JT coherent transmission is used as the final cooperative set.

  For example, if three user equipments, i.e., UE1, UE2, and UE3 are involved in MU-JT coherent transmission, UE1's second cooperative set includes Cell0, Cell1, Cell2, and Cell3, and UE2's The second cooperative set includes Cell0, Cell1, and Cell2, and the second cooperative set of UE3 includes Cell0, Cell1, and Cell3. In this case, the cooperative set for MU-JT coherent transmission includes Cell0 and Cell1.

  It should be understood that the number of user equipment or cells in the foregoing example is merely illustrative and is not intended to limit the scope of the present invention.

  Optionally, prior to step 101, the base station may determine whether a JT coherent transmission needs to be performed on the user equipment according to the received measurement information reported by the user equipment. If the CQI or RSRP of the service cell reported by the user equipment is less than the threshold, the base station determines that the user equipment is an edge user equipment and therefore a JT coherent transmission needs to be performed for the user equipment. If it is determined that there is, step 101 is executed.

  Optionally, after step 102, it can also be estimated whether the signal gain of JT coherent transmission performed on the user equipment with the second coordinated transmission set is greater than the signal gain of non-JT coherent transmission. If the signal gain of JT coherent transmission is greater than the signal gain of non-JT coherent transmission, step 103 is performed.

  One embodiment of the present invention will be described in more detail with reference to the example shown in FIG.

  201. The base station determines that a JT coherent transmission needs to be performed for the user equipment.

  Optionally, the base station can also make a decision according to the received measurement information reported by the user equipment. If the measurement information reported by the user equipment indicates that the CQI or RSRP of the serving cell is less than the threshold, the base station determines that the user equipment is an edge user equipment and therefore the user equipment will be able to send JT coherent transmission. It is determined that the user equipment involved, i.e. JT coherent transmission needs to be performed on the user equipment.

  It should be noted that the measurement information reported by the UE may include at least one of RSRP, RSRQ, CQI, SINR, BLER, etc. It should be understood that this embodiment of the invention is not limited to these.

  202. The base station obtains a first coordinated transmission set and a first correction set for the user equipment.

  Optionally, the base station of the serving cell of the user equipment can also obtain at least one first correction set from the network controller, wherein the at least one first correction set is first coordinated transmission of the user equipment. It can also be acquired from a base station to which a reference cell that is a cell in the set belongs, and this is not limited in this embodiment of the present invention. Specifically, after any two cells in the plurality of cells belonging to the base station complete the joint channel correction, the base station determines the plurality of cells as the first correction set, and the first cell The correction set can be sent to the network controller. Preferably, if the base station is not a reference cell base station, the first correction set is sent to the reference cell base station in the cooperative network. Latency is reduced if the base station only needs to obtain the first correction set from the base station of the reference cell rather than from the network controller. It should be noted that cells belonging to different base stations can also perform joint channel correction, which is not limited in this embodiment of the present invention.

  Optionally, the at least one first correction set can also be obtained using a dedicated interface, i.e. an interface defined by the base station (e.g. in a scenario where the baseband board supports multiple cells). . It should be noted that the at least one first correction set can also be obtained using another interface (such as an X2 interface), which is not limited in this embodiment of the invention.

  Optionally, the first coordinated transmission set may be a static coordinated transmission set, a quasi-static coordinated transmission set, or a dynamic coordinated transmission set. For example, if the first coordinated transmission set is a static coordinated transmission set, the base station can select the first coordinated transmission set of the user equipment from among the coordinated sets acquired from the network controller.

  Optionally, each acquired first correction set includes a service cell of the user equipment.

  203. The base station determines a second coordinated transmission set for the user equipment.

  Optionally, if the base station obtains only one first correction set in step 202, the base station will determine the intersection of the first coordinated transmission set of the user equipment and the one first correction set, It can be determined as a second coordinated transmission set for the user equipment. For example, the first coordinated transmission set of the user equipment includes Cell0, Cell1, and Cell2, and the first correction set includes Cell0, Cell1, and Cell3, that is, the three cells, Cell0, Cell1, and Assume that any two of Cell3 have completed joint channel correction. The base station determines Cell0 and Cell1 as the second coordinated transmission set of the user equipment.

  Optionally, if the base station obtains a plurality of first correction sets in step 202, the base station selects a plurality of first correction sets including a service cell of the user equipment, and the base station Determining the second correction set as the second correction set, and determining the intersection of the first coordinated transmission set of the user equipment and the second correction set as the second coordinated transmission set of the user equipment. it can. Two correction sets are used as an example for illustration, the first correction set includes Cell0, Cell1, and Cell3, the second correction set includes Cell0, Cell2, and Cell4, and two The correction set knot includes Cell0, Cell1, Cell2, Cell3, and Cell4. If the first coordinated transmission set of the user equipment includes Cell0, Cell1, and Cell2, the base station determines that Cell0, Cell1, and Cell2 are the second coordinated transmission set of the user equipment.

  Optionally, if multiple user equipments are involved in JT coherent transmission, i.e., in the case of MU-JT coherent transmission, a second coordinated transmission set is determined one for each of the multiple user equipments. The intersection of the second coordinated transmission sets corresponding to the plurality of user equipments is determined as the final second coordinated transmission set. For specific examples, the above description can be referred to, and details are not described here again.

  It should be understood that the foregoing examples are merely illustrative and are not intended to limit the scope of the present invention.

  204. The base station estimates the gain of JT coherent transmission performed by the second coordinated transmission set.

  205. The base station determines that JT coherent transmission is performed using the second coordinated transmission set.

  Optionally, if the base station determines in step 204 that the signal gain for JT coherent transmission performed on the user equipment using the second coordinated transmission set is greater than the signal gain for non-JT coherent transmission, Determines that JT coherent transmission is performed using the second coordinated transmission set.

  In this embodiment of the invention, the base station not only obtains the first coordinated transmission set of the user equipment, but also if joint channel correction needs to be performed for multiple cells in JT coherent transmission. Also obtain at least one first correction set for which correction is to be completed. Thus, if JT coherent transmission is performed on the user equipment with a first cooperative transmission set of the user equipment and a second cooperative transmission set determined according to at least one first correction set, the joint transmission Signal gain is improved.

  FIG. 3 is a structural block diagram of a base station according to an embodiment of the present invention. Base station 300 includes an acquisition unit 301, a determination unit 302, and a transmission unit 303.

  The acquiring unit 301 acquires a first coordinated transmission set of user equipment, acquires at least one first correction set, each of the at least one first correction set includes at least two cells, and at least those Joint channel correction is completed for any two cells in the two cells, and the first coordinated transmission set includes at least one set of cells that provides coordinated transmission for the user equipment.

  The determination unit 302 determines the second cooperative transmission set of the user equipment according to the first cooperative transmission set of the user equipment and at least one first correction set acquired by the acquisition unit 301.

  The transmission unit 303 performs JT coherent transmission on the user equipment according to the second coordinated transmission set of the user equipment determined by the determination unit 302.

  In this embodiment of the invention, the base station not only obtains the first coordinated transmission set of the user equipment, but also if joint channel correction needs to be performed for multiple cells in JT coherent transmission. At least one first correction set for which correction is to be completed is also obtained, and the first coordinated transmission set is a static coordinated transmission set, a quasi-static coordinated transmission set, or a dynamic coordinated transmission set. Thus, if JT coherent transmission is performed on the user equipment with a first cooperative transmission set of the user equipment and a second cooperative transmission set determined according to at least one first correction set, the joint transmission Signal gain is improved.

  Base station 300 may implement the steps involved in the base station in the methods of FIGS. 1 and 2 and will not be described again in detail here to avoid repetition.

  Optionally, as one embodiment, the first coordinated transmission set of the user equipment may be a static coordinated transmission set, a quasi-static coordinated transmission set, or a dynamic coordinated transmission set.

  A static coordinated transmission set means that when a collaborative network is deployed (a collaborative network can contain multiple base stations, one base station can serve multiple cells, A small cell base station or micro base station or RRU), JT coherent transmission for the UE (such as combining multiple cells to transmit data services to the UE), It is determined by the UE serving cell base station, and when a plurality of cells are determined, no further changes are made. For example, a plurality of cells, Cell0 to Cell5, are deployed in the cooperative network, and the base station of the UE serving cell determines that the cells that perform JT coherent transmission for the UE are Cell0, Cell2, and Cell4, No more changes are made.

  A quasi-static coordinated transmission set means that for a UE when a coordinated network is deployed (a coordinated network can include multiple base stations, and one base station can serve multiple cells). A plurality of cells performing JT coherent transmission is determined by the base station of the serving cell of the UE according to the deployment and measurement information reported by the UE. For example, a plurality of cells, Cell0 to Cell5, are deployed in the cooperative network. In the initial stage, the base station of the serving cell (Cell1) of the UE determines that the cells that perform JT coherent transmission are Cell0, Cell2, and Cell4 for the UE. At a certain time, the UE reports measurement information to the base station, and the base station determines that the cells are Cell2, Cell3, and Cell5 according to the measurement information reported by the UE. At this point, the base station can select Cell2, Cell3, and Cell5 to perform JT coherent transmission for the UE. Undoubtedly, the base station can also determine a cell for JT coherent transmission in polling mode. For example, first, the base station determines that JT coherent transmission for the UE is performed using Cell0, Cell1, and Cell2, and after a period of time, the base station uses Cell3, Cell4, and Cell5. Then, it is determined that JT coherent transmission for the UE is performed.

  The static cooperative transmission set of all UEs in the same service cell can be the same, or the quasi-static cooperative transmission set of all UEs in the same service cell can be the same.

  A dynamic coordinated transmission set means that a base station determines a plurality of cells performing JT coherent transmission for a UE according to measurement information reported by the UE, that is, a plurality of UEs performing JT coherent transmission. This refers to determining a cell. For example, a plurality of cells, Cell0 to Cell5, are deployed in a coordinated network, and the base station determines the measurement information reported by the UE (eg, the difference between the RSRP of the serving cell and the RSRP of neighboring cells reported by the UE). Is determined to be Cell2, Cell4, and Cell5 for JT coherent transmission for the UE. In this case, the base station determines that JT coherent transmission for the UE is performed using Cell2, Cell4, and Cell5. The coordinated transmission set may vary according to measurement information reported by various UEs.

  It should be noted that the measurement information reported by the UE may include at least one of RSRP, RSRQ, CQI, SINR, BLER, etc. It should be understood that this embodiment of the invention is not limited to these.

  Optionally, as another embodiment, if the acquisition unit 301 acquires only one first correction set, the determination unit 302 may acquire the first coordinated transmission set of the user equipment and the acquisition unit 301 It is specifically configured to determine the intersection of one first correction set as the second coordinated transmission set of the user equipment.

  Optionally, as another embodiment, when the acquisition unit 301 acquires a plurality of first correction sets, the determination unit 302 particularly ties a plurality of first correction sets acquired by the acquisition unit 301. The second correction set is determined, and the intersection of the first coordinated transmission set of the user equipment and the second correction set acquired by the acquisition unit 301 is determined as the second coordinated transmission set of the user equipment.

  Optionally, as another embodiment, the acquisition unit 301 specifically acquires at least one first correction set from the network controller, or in particular acquires at least one first correction set of the user equipment. Obtained from a base station to which a reference cell that is a cell in one coordinated transmission set belongs.

  Optionally, as another embodiment, the acquiring unit 301 acquires at least one first correction set that includes, in particular, a service cell of the user equipment.

  Optionally, as another embodiment, when a plurality of user equipments are involved in JT coherent transmission, and the user equipment is one of the plurality of user equipments, the transmitting unit 303 is in particular a plurality of user equipments. And JT coherent transmission is performed on the user equipment in accordance with the intersection of the second coordinated transmission set acquired by the acquisition unit 301.

  Optionally, the determination unit 302 further determines whether JT coherent transmission needs to be performed on the user equipment according to the reception measurement information reported by the user equipment. If the CQI or RSRP of the service cell reported by the user equipment is less than the threshold, the determining unit 302 further determines that the user equipment is an edge user equipment, and therefore JT coherent transmission is performed on the user equipment. It is determined that it is necessary.

  Optionally, the determination unit 302 further estimates whether the signal gain of JT coherent transmission performed on the user equipment using the second coordinated transmission set is greater than the signal gain of non-JT coherent transmission.

  Embodiments of the present invention further provide apparatus embodiments for implementing the steps and methods in the foregoing method embodiments. FIG. 4 is a structural block diagram of a base station according to another embodiment of the present invention. In the present embodiment, the device 400 includes a processor 401, a memory 402, a transmitter 403, and a receiver 404. The processor 401 controls the operation of the device 400, and the processor 401 is also called a CPU (Central Processing Unit). Memory 402 may include read only memory and random access memory and provides instructions and data for processor 401. A portion of the memory 402 can further include non-volatile random access memory (NVRAM). The processor 401, the memory 402, the transmitter 403, and the receiver 404 are coupled to each other using a bus system 410. The bus system 410 includes a power bus, a control bus, and a status signal bus in addition to a data bus. Further included. However, for clarity of illustration, all types of buses are shown as bus system 410 in the figure.

The methods disclosed by the foregoing embodiments of the present invention can be applied to the device 400. The processor 401 can be an integrated circuit chip and has signal processing capability. In one implementation process, the steps of the foregoing method can be completed by instructions in the form of hardware integrated logic or software in processor 401. The aforementioned processor 401 can be a general-purpose processor, and includes a central processing unit (CPU), a network processor (Network Processor, NP), etc., and a digital signal processor (Digital Signal Processor , DSP), Application Specific Integrated Circuit (ASIC), Field Programmable Gate Array (FPGA) or another programmable logic device, discrete gate or transistor logic device, or discrete hardware component It can also be. A processor may implement or execute the methods, steps, and logic block diagrams disclosed in the embodiments of the present invention. A general purpose processor may be a microprocessor, and the processor may be any conventional processor or the like.

  The processor 401 obtains a first coordinated transmission set of user equipment and obtains at least one first correction set, each of the at least one first correction set including at least two cells, and at least two of them. Joint channel correction is completed for any two cells in one cell, and the first coordinated transmission set includes at least one set of cells that provides coordinated transmission for user equipment.

  The processor 401 further determines a second coordinated transmission set for the user equipment according to the first coordinated transmission set for the user equipment and the obtained at least one first correction set.

  The transmitter 403 performs JT coherent transmission on the user equipment according to the second coordinated transmission set of the user equipment determined by the processor 401.

  In this embodiment of the invention, the base station not only obtains the first coordinated transmission set of the user equipment, but also if joint channel correction needs to be performed for multiple cells in JT coherent transmission. At least one first correction set for which correction is to be completed is also obtained, and the first coordinated transmission set is a static coordinated transmission set, a quasi-static coordinated transmission set, or a dynamic coordinated transmission set. Thus, if JT coherent transmission is performed on the user equipment with a first cooperative transmission set of the user equipment and a second cooperative transmission set determined according to at least one first correction set, the joint transmission Signal gain is improved.

  The base station 400 can implement the steps involved in the base station in the methods of FIGS. 1 and 2 and will not be described again in detail here to avoid repetition.

  Optionally, as one embodiment, the first coordinated transmission set of the user equipment may be a static coordinated transmission set, a quasi-static coordinated transmission set, or a dynamic coordinated transmission set.

  A static coordinated transmission set means that when a collaborative network is deployed (a collaborative network can contain multiple base stations, one base station can serve multiple cells, A small cell base station or micro base station or RRU), JT coherent transmission for the UE (such as combining multiple cells to transmit data services to the UE), It is determined by the UE serving cell base station, and when a plurality of cells are determined, no further changes are made. For example, a plurality of cells, Cell0 to Cell5, are deployed in the cooperative network, and the base station of the UE serving cell determines that the cells that perform JT coherent transmission for the UE are Cell0, Cell2, and Cell4, No more changes are made.

  A quasi-static coordinated transmission set means that for a UE when a coordinated network is deployed (a coordinated network can include multiple base stations, and one base station can serve multiple cells). A plurality of cells performing JT coherent transmission is determined by a base station of a UE serving cell according to deployment and measurement information reported by the UE. For example, a plurality of cells, Cell0 to Cell5, are deployed in the cooperative network. In the initial stage, the base station of the UE serving cell (Cell1) determines that the cells that perform JT coherent transmission are Cell0, Cell2, and Cell4 for the UE. At a certain time, the UE reports measurement information to the base station, and the base station determines that the cells are Cell2, Cell3, and Cell5 according to the measurement information reported by the UE. At this point, the base station can select Cell2, Cell3, and Cell5 to perform JT coherent transmission for the UE. Undoubtedly, the base station can also determine a cell for JT coherent transmission in polling mode. For example, first, the base station determines that JT coherent transmission for the UE is performed using Cell0, Cell1, and Cell2, and after a period of time, the base station uses Cell3, Cell4, and Cell5. Then, it is determined that JT coherent transmission for the UE is performed.

  The static cooperative transmission set of all UEs in the same service cell can be the same, or the quasi-static cooperative transmission set of all UEs in the same service cell can be the same.

  A dynamic coordinated transmission set means that a base station determines a plurality of cells performing JT coherent transmission for a UE according to measurement information reported by the UE, that is, a plurality of UEs performing JT coherent transmission. This refers to determining a cell. For example, a plurality of cells, Cell0 to Cell5, are deployed in a coordinated network, and the base station determines the measurement information reported by the UE (eg, the difference between the RSRP of the serving cell and the RSRP of neighboring cells reported by the UE). Is determined to be Cell2, Cell4, and Cell5 for JT coherent transmission for the UE. In this case, the base station determines that JT coherent transmission for the UE is performed using Cell2, Cell4, and Cell5. The coordinated transmission set may vary according to measurement information reported by various UEs.

  It should be noted that the measurement information reported by the UE may include at least one of RSRP, RSRQ, CQI, SINR, BLER, etc. It should be understood that this embodiment of the invention is not limited to these.

  Optionally, as another embodiment, when only one first correction set is acquired, the processor 401 specifically recognizes the first coordinated transmission set of the user equipment and that one first acquired. The intersection of the correction sets of 1 is determined as the second coordinated transmission set of the user equipment.

  Optionally, as another embodiment, if there are a plurality of first correction sets to be acquired, the processor 401 specifically determines a knot of the plurality of first correction sets to be acquired as a second correction set. Then, the intersection of the acquired first coordinated transmission set of the user equipment and the second correction set is determined as the second coordinated transmission set of the user equipment.

  Optionally, as another embodiment, the processor 401 specifically obtains at least one first correction set from the network controller, or in particular acquires at least one first correction set from the first of the user equipment. From a base station to which a reference cell that is a cell in the cooperative transmission set belongs.

  Optionally, as another embodiment, the processor 401 obtains at least one first correction set including, in particular, a service cell of the user equipment.

  Optionally, as another embodiment, the transmitter 403 is specifically configured for multiple user equipments when multiple user equipments are involved in JT coherent transmission and the user equipment is one of the multiple user equipments. JT coherent transmission is performed on the user equipment according to the intersection of the acquired second coordinated transmission set corresponding to.

  Optionally, the processor 401 further determines whether a JT coherent transmission needs to be performed on the user equipment according to the measurement information reported by the user equipment and received by the receiver 404. If the CQI or RSRP of the service cell reported by the user equipment is below the threshold, the processor 401 further determines that the user equipment is an edge user equipment and therefore a JT coherent transmission needs to be performed on the user equipment It is decided that there is.

  Optionally, the processor 401 further estimates whether the signal gain of the JT coherent transmission performed on the user equipment using the second coordinated transmission set is greater than the signal gain of the non-JT coherent transmission.

  Those of skill in the art understand that, in combination with the examples described in the embodiments disclosed herein, each unit and algorithm step can be implemented by electronic hardware or by a combination of computer software and electronic hardware. Will do. Whether each function performs hardware or software depends on the particular application and design constraints of the technical solution. One skilled in the art can implement the functions described for each application using various methods, but such implementation should not be considered beyond the scope of the present invention.

  For ease of explanation, those skilled in the art can clearly understand that the detailed operating processes of the aforementioned systems, devices, and units can refer to the corresponding processes in the foregoing method embodiments. I won't go into details again here.

  It should be understood that in some embodiments provided in this application, the disclosed systems, devices, and methods may be implemented in other ways. For example, the described apparatus embodiment is merely exemplary. For example, unit division is merely logical function division, and other division is possible in actual implementation. For example, multiple units or components may be combined or integrated into another system, and certain features may be ignored or not performed. In addition, the displayed or discussed mutual coupling or direct coupling or communication connection can also be implemented via several interfaces. Indirect coupling or communication connections between devices or units can be implemented in electronic form, mechanical form, or other form.

  Units described as separate parts may or may not be physically separated, and parts displayed as units may or may not be physical units and are in one position. It may be located and distributed over a plurality of network units. Some or all of the units can also be selected according to the actual needs to achieve the solution objectives of each embodiment.

  In addition, the functional units in each embodiment of the present invention can be integrated into a single processing unit, each of which may be physically independent, or two or more units may be one Integrated into the unit.

  As each function is implemented in the form of software functional units and sold or used as an independent product, those functions can be stored on a computer-readable storage medium. Based on such understanding, the technical solution of the present invention can be implemented in the form of a software product, essentially or part of the prior art, or part of the technical solution. The software product is stored in a storage medium, and a computer device (which can be a personal computer, server, or network device) is subjected to all or part of the method steps described in the embodiments of the present invention. Contains several instructions for instructing to execute. The aforementioned storage medium stores program codes such as a USB flash drive, a removable hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, and an optical disk. Including any medium capable of.

  The above descriptions are merely specific implementation methods of the present invention and are not intended to limit the protection scope of the present invention. Any variation or replacement readily figured out by a person skilled in the art within the technical scope disclosed in the present invention shall fall within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

300 base stations
301 Acquisition Department
302 decision part
303 Transmitter
400 devices
401 processor
402 memory
403 transmitter
404 receiver
410 bus system

Claims (21)

A first base station obtaining a first coordinated transmission set of the user equipment including at least one cell providing coordinated transmission for the user equipment;
The first base station obtaining a first correction set, wherein the first correction set includes at least two cells, and joint channel correction is any two cells in the at least two cells; The joint channel correction corresponds to a plurality of cells, and the intermediate frequency channel response and the radio frequency channel response obtained after digital correction or analog correction are temporally and / or topologically matched. The correction performed for any two cells, and the first base station obtaining a first correction set,
The first base station determines a second coordinated transmission set of the user equipment according to the first coordinated transmission set and the first correction set of the user equipment;
The first base station performing joint transmission (JT) coherent transmission on the user equipment according to the second coordinated transmission set of the user equipment. When the number of the first correction set is 1, the step of determining a second coordinated transmission set of the user equipment according to the first coordinated transmission set of the user equipment and the first correction set; ,
2. The communication method according to claim 1, comprising determining the second cooperative transmission set of the user equipment according to the intersection of the first cooperative transmission set of the user equipment and the first correction set. The step of determining a second coordinated transmission set of the user equipment according to the first coordinated transmission set and the first correction set of the user equipment when the number of the first correction set is plural; ,
Determining a knot of the plurality of acquired first correction sets as a second correction set;
Further comprising determining the intersection of the first coordinated transmission set of the user equipment and the acquired second correction set as the second coordinated transmission set of the user equipment. The communication method described. The at least one cell providing coordinated transmission for the user equipment is
A service cell belonging to the first base station,
The first base station and the second base station are selected from at least one of reference cells belonging to a second base station, and the first base station and the second base station are located in a cooperative network. The communication method described in 1.   5. The communication method according to claim 1, wherein at least two cells included in the first correction set belong to one base station. The step in which the first base station obtains a first correction set comprises:
6. The communication method according to claim 1, further comprising a step of acquiring the first correction set from a network controller. The step in which the first base station obtains a first correction set comprises:
7. The method of claim 1, further comprising: obtaining the first correction set from a second base station to which a reference cell that is a cell in the first coordinated transmission set of the user equipment belongs. The communication method described in 1. When a plurality of user equipments are involved in JT coherent transmission and the user equipment is one of the plurality of user equipments, JT coherent on the user equipment according to the second coordinated transmission set of the user equipment The step of transmitting comprises
Includes performing JT coherent transmitted on the user equipment in accordance with the intersection of each set between a plurality of second coordinated transmission set corresponding to one by one of the plurality of user equipment, any one of claims 1 to 7 one The communication method according to the item.   The communication method according to any one of claims 1 to 8, wherein the first cooperative transmission set of the user equipment is a static cooperative transmission set, a quasi-static cooperative transmission set, or a dynamic cooperative transmission set. . Before the step in which the base station obtains the first coordinated transmission set of the user equipment,
10. The communication according to any one of claims 1 to 9, further comprising the base station determining a JT coherent transmission to be performed for the user equipment according to measurement information reported by the user equipment. Method. A base station comprising a processor and a transmitter, wherein the processor obtains a first coordinated transmission set of the user equipment including a set of at least one cell providing coordinated transmission for the user equipment; 1 correction set, the first correction set includes at least two cells, and joint channel correction is completed for any two cells in the at least two cells;
The joint channel correction corresponds to a plurality of cells, and the intermediate frequency channel response and the radio frequency channel response obtained after digital correction or analog correction are matched in time and / or in phase. A correction performed on any two cells,
The processor further determines a second coordinated transmission set for the user equipment according to the first coordinated transmission set for the user equipment and the first correction set obtained by the processor;
The base station performs joint transmission (JT) coherent transmission on the user equipment according to the second coordinated transmission set of the user equipment determined by the processor.   When the number of the first correction set is 1, the processor, in particular, intersects the acquired first coordinated transmission set of the acquired user equipment and the acquired first correction set. 12. The base station according to claim 11, wherein the base station is determined as the second coordinated transmission set of the user equipment.   When the number of the first correction sets is a plurality, the processor further determines a knot of the plurality of first correction sets to be acquired as a second correction set, and the user equipment includes the first correction set. 13. The base station according to claim 11 or 12, wherein an intersection of one cooperative transmission set and the acquired second correction set is determined as the second cooperative transmission set of the user equipment. The processor, in particular, the at least one cell providing coordinated transmission for the user equipment,
A service cell belonging to the base station,
The base station and the second base station are selected from at least one of reference cells belonging to a second base station, and the base station and the second base station are located in a cooperative network. base station.   15. The base station according to claim 11, wherein the at least two cells included in the first correction set belong to one base station.   16. The base station according to any one of claims 11 to 15, wherein the processor specifically obtains the first correction set from a network controller.   16. The processor according to any one of claims 11 to 15, wherein the processor obtains, in particular, the first correction set from a second base station to which a reference cell that is a cell in the first coordinated transmission set of the user equipment belongs. A base station according to any one of the above. When a plurality of user equipments are involved in JT coherent transmission and the user equipment is one of the plurality of user equipments, the transmitter specifically corresponds to each one of the plurality of user equipments. The base station according to any one of claims 11 to 17, wherein the JT coherent transmission is performed on the user equipment according to an intersection of a plurality of second coordinated transmission sets acquired by the processor.   The base station according to any one of claims 11 to 18, wherein the first coordinated transmission set of the user equipment is a static coordinated transmission set, a quasi-static coordinated transmission set, or a dynamic coordinated transmission set. .   The base station according to any one of claims 11 to 19, wherein the processor further determines a JT coherent transmission to be performed for the user equipment according to measurement information reported by the user equipment.   A computer-readable storage medium storing a program including instructions for performing the method according to any one of claims 1 to 10.

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