JP6862483B2 - Resource reuse device, user equipment and resource reuse method - Google Patents

Description

The present invention relates to the field of communication technology, and more particularly to a resource reusing device, a user device, and a resource reusing method.

Long Term Evolution-Advanced (abbreviated as "LTE-A") of the 3rd Generation Partnership Project (abbreviated as "3GPP") is Long Term Evolution (abbreviated as "LTE"). ) Is an extension. The LTE-A system has higher bandwidth requirements than the LTE system and supports a downlink peak data rate of 1 Gbit / s and an uplink peak data rate of 500 Mbit / s. To meet the requirements of LTE-A, the LTE-A system uses multiple techniques to improve the data rate. However, with the rapid development of wireless communication and the advent of ultra-high-speed services (for example, high-definition video), the load on wireless communication networks will become even heavier. In order to further reduce the load on the network, device-to-device (Device to Device, abbreviated as "D2D") communication appears. In this communication mode, the terminals can communicate directly with each other without forwarding via the evolutionary node B, thereby reducing the load on the evolutionary node B. In D2D communication, spectral resources can be better utilized, spectral utilization and data rates can be improved, thereby reducing the load on the evolved node B.

In the prior art, the specific process by which a user equipment (abbreviated as “UE”) acquires a resource is as follows. The UE monitors the available resources in a given cycle. If a free resource is found, the UE can select the resource, declare the use of the resource on the currently declared channel, and use that resource to send data in the next cycle.

The present inventors have found that the prior art has the following drawbacks in the process of carrying out the present invention.

In a given cycle, multiple UEs may declare resources at the same time. If a resource declared by another UE is the same as a resource declared by the UE (if different UEs declare the same resource), then there is a resource contention for the declared resource, which is available to the UE. There will be a relatively large delay in getting the. In particular, when the number of UEs is large and the free resources are small, the probability of competition is very high. In this case, the UE would have to declare multiple times to get the available resources, and thus the delay in getting the resources by the user would be greater.

In the D2D communication mode, when the UE reuses resources, the embodiment of the present invention solves the problems in the prior art that the conflict probability is relatively high and the delay of resource acquisition of the UE is relatively large. , Resource reuse device, user equipment and resource reuse method. The technical solution is as follows.

According to the first aspect, the embodiment of the present invention provides a resource reusing device provided in the first user equipment. This device
A monitoring module configured to monitor free resources and get a first set of free resources,
A declaration module that is configured to declare the use of the first resource in the first cycle, the first resource being a resource of the first free resource set acquired by the monitoring module. When,
A determination module configured to determine whether or not the first resource exists in the first declaration target resource set, and the first declaration target resource set is another user device other than the first user device. A judgment module, which is a set of resources declared to be used by the user device,
A transmission module configured to transmit data using the first resource in the second cycle when the first resource does not exist in the first declarative resource set.
To be equipped. The declaration module is further configured to declare the use of the second resource in the second cycle when the first resource is in the first set of resources to be declared, and the second resource is the first. A resource that is contained in the free resource set of and is different from the first resource, the second cycle is the cycle following the first cycle, or the resource after at least one cycle after the first cycle. Is configured to redeclare.

In the first possible embodiment of the invention, the device is further described.
A resource whose use is declared in the first cycle by another user device other than the first user device before the determination module determines whether the first resource exists in the first declaration target resource set. A decision module, which is configured to determine and get the first set of resources to be declared.
To be equipped.

In the second possible embodiment of the present invention, when the first resource is present in the first declarative resource set, the declarative module will follow the first free resource set and the first declarative resource set. It is configured to select a second resource from one free resource set and declare the use of the second resource in the second cycle.

Optionally, the declaration module
A first declarative unit configured to select a resource as a second resource from A- (A∩B), where A represents the first free resource set and B is the first resource to be declared. The first declarative unit, representing a set,
Have.

Optionally, the declaration module
In the first resource set to be declared, it is the first statistical unit configured to statistic the declaration information of each resource, and the declaration information is the number of declarations of each resource and the user equipment that declared each resource. A first statistical unit that includes one or more of the number, the signal power of the user device that declared each resource, and the interference of the user device that declared each resource.
A second declarative unit configured to select a second resource from the first free resource set according to the declarative information of each resource statistic by the first statistical unit.
Have.

In addition, the second declarative unit is
From the first free resource set, select the resource with the smallest number of declarations as the second resource, or
The resource corresponding to the minimum number of user devices in the first free resource set is used as the second resource, or
The resource with the lowest signal power in the first free resource set is used as the second resource, or
The resource with the least signal interference in the first free resource set is configured to be used as the second resource.

In the third possible embodiment of the invention, the declaration module is
In the first resource set to be declared, a second statistical unit configured to statistic the number C of user devices that declared the first resource and generate a random number r in the range of [1, C], and a second statistical unit.
With a third declarative unit configured to redeclare the resource after r cycles after the first cycle,
Have.

In the fourth possible embodiment of the invention, the declaration module is
After at least one cycle after the first cycle, a fourth declarative unit configured to select a third resource from the first free resource set and declare the use of the third resource, or ,
A fifth declarative unit configured to select a third resource from the second free resource set and declare the use of the third resource after the first cycle and after at least one cycle interval. A fifth declaration, wherein the second free resource set is a free resource set obtained by the monitoring module re-monitoring the free resources after at least one cycle after the first cycle. unit,
Have.

In a fifth possible embodiment of the invention, the declaration module further
It is configured to select a resource from A- (A∩B) as the first resource before declaring the use of the first resource in the first cycle, where A represents the first free resource set. B represents the first set of resources to be declared, or
It is configured to randomly select a resource as the first resource from the first free resource set before declaring the use of the first resource in the first cycle.
It is configured to select the first resource from the first free resource set according to the declaration information of each resource in the first declared resource set before declaring the use of the first resource in the first cycle. , Declaration information is one or more of the number of declarations of each resource, the number of user devices that declared each resource, the signal power of the user device that declared each resource, and the interference of the user device that declared each resource. Including.

According to the second aspect, an embodiment of the present invention provides a user device. The user equipment includes a transmitter, a memory, and a processor.
The transmitter is configured to transmit data
Memory is configured to store instructions and data
The processor calls the program code stored in memory and
The process of monitoring free resources and acquiring the first free resource set,
The process of declaring the use of the first resource in the first cycle, the first resource being the resource of the first free resource set, and the process.
It is a step of determining whether or not the first resource exists in the first declaration target resource set, and the first declaration target resource set is declared to be used by another user device other than the first user device. The process, which is a set of resources to be done,
When the first resource exists in the first resource set to be declared, in the second cycle, it is a step of declaring the use of the second resource, and the second resource is in the first free resource set. A resource that is different from the included first resource, the second cycle is the next cycle of the first cycle, the process, or the resource is redeclared after at least one cycle after the first cycle. Process or
If the first resource does not exist in the first resource set to be declared, in the second cycle, the process of transmitting data using the first resource and the process of transmitting data,
Is configured to run.

According to a third aspect, embodiments of the present invention further provide a resource reuse method. This method
A step in which the first user device monitors free resources and acquires the first free resource set.
The step of declaring the use of the first resource in the first cycle, the first resource being the resource of the first free resource set, and the step.
It is a step of determining whether or not the first resource exists in the first declaration target resource set, and the first declaration target resource set is declared to be used by another user device other than the first user device. A set of resources, steps and
When the first resource exists in the first resource set to be declared, in the second cycle, it is a step of declaring the use of the second resource, and the second resource is in the first free resource set. A resource that is different from the included first resource, the second cycle is the next cycle of the first cycle, the step, or the resource is redeclared after at least one cycle after the first cycle. Steps to do or
If the first resource does not exist in the first resource set to be declared, in the second cycle, the step of transmitting data using the first resource and
including.

In the first possible embodiment of the invention, the method further comprises a step of determining whether a first resource is present in the first declarative resource set.
A step of determining which resources are declared to be used in the first cycle by another user device other than the first user device and acquiring the first set of resources to be declared.
including.

In the second possible embodiment of the invention, if the first resource is present in the first declarative resource set, the step of declaring the use of the second resource in the second cycle is
When the first resource exists in the first declared target resource set, the second resource is selected from the first free resource set according to the first free resource set and the first declared target resource set, and the second resource is selected. In the cycle of, the step of declaring the use of the second resource,
including.

Optionally, the step of selecting a second resource from the first free resource set according to the first free resource set and the first declared resource set is
A step of selecting a resource from A- (A∩B) as a second resource, where A represents the first free resource set and B represents the first declaration target resource set.
including.

Optionally, the step of selecting a second resource from the first free resource set according to the first free resource set and the first declared resource set is
In the first resource set to be declared, it is a step of statistic of the declaration information of each resource, and the declaration information includes the number of declarations of each resource, the number of user devices that declare each resource, and the user who declares each resource. A step that includes one or more of the signal power of the device and the interference of the user device that declared each resource.
The step of selecting the second resource from the first free resource set according to the declaration information of each resource, and
including.

Further, the step of selecting the second resource from the first free resource set according to the declaration information of each resource is
A step of selecting the resource with the minimum number of declarations as the second resource from the first free resource, or
The step of using the resource corresponding to the minimum number of user devices in the first free resource set as the second resource, or
The step of using the resource having the lowest signal power in the first free resource set as the second resource, or
The step of using the resource with the least signal interference in the first free resource set as the second resource,
including.

In a third possible embodiment of the invention, the step of redeclaring a resource after at least one cycle after the first cycle is
In the first resource set to be declared, the step of statisticizing the number C of the user devices that declared the first resource, and
A step of generating a random number r in the range of [1, C] and redeclaring the resource after r cycles after the first cycle, and
including.

In the fourth possible embodiment of the invention, the step of redeclaring a resource is
A step of selecting a third resource from the first free resource set and declaring the use of the third resource,
The steps that include or redeclare the resource
Steps to re-monitor free resources and get a second set of free resources,
A step of selecting a third resource from the second free resource set and declaring the use of the third resource,
including.

In a fifth possible embodiment of the invention, the method further comprises declaring the use of the first resource in the first cycle.
A step of selecting a resource from A- (A∩B) as the first resource, where A represents the first free resource set and B represents the first declaration target resource set, step or
A step of randomly selecting a resource as the first resource from the first free resource set, or
It is a step of selecting the first resource from the first free resource set according to the declaration information of each resource of the first declaration target resource set, and the declaration information is the number of declarations of each resource and each resource is declared. A step that includes one or more of the number of user devices, the signal power of the user device that declared each resource, and the interference of the user device that declared each resource.
including.

The technical solutions provided in embodiments of the present invention may include the following beneficial effects: That is, the first user device is determined by determining the relationship between the free resource detected by the UE (first free resource set) and the free resource declared by another device (first declaration target resource set). If a resource declared by is in conflict with a resource declared by another UE, another resource is selected for declaration from the first free resource set (the free resource set detected by the first user device). , The first user equipment selects another resource for declaration, or redistributes the resource after at least one cycle interval. In this way, contention backoff is performed to reduce the possibility of contention between UEs when the UE acquires resources and the delay in resource acquisition, and improve the utilization of system resources.

It should be understood that the general description above and the detailed description below are merely exemplary and are not intended to limit this disclosure.

In order to more clearly explain the technical solution of the embodiment or the prior art of the present invention, the accompanying drawings necessary for explaining the embodiment or the prior art will be briefly described. Obviously, the accompanying drawings in the following description show only some embodiments of the present invention. One of ordinary skill in the art would be able to derive yet another drawing from these attached drawings without ingenuity.
It is a figure which shows the application scenario of the resource reuse apparatus, the user equipment and the resource reuse method which concerns on embodiment of this invention. It is a schematic structure diagram of the resource reuse apparatus which concerns on Embodiment 1 of this invention. It is a schematic structure diagram of the resource reuse apparatus which concerns on Embodiment 2 of this invention. It is a schematic structure diagram of the declaration module which concerns on Embodiment 2 of this invention. It is a schematic structure diagram of another declaration module which concerns on Embodiment 2 of this invention. It is a schematic structure diagram of yet another declaration module which concerns on Embodiment 2 of this invention. It is a schematic structural drawing of the user equipment which concerns on Embodiment 3 of this invention. It is a flowchart of the resource reuse method which concerns on Embodiment 4 of this invention. It is the schematic which concerns on Embodiment 4 of this invention that a UE declares a resource in a declaration channel in a predetermined cycle. It is a figure which shows the relationship between the resource sets when the number of UEs is small and the resource is large, which concerns on Embodiment 4 of this invention. It is a flowchart of the resource reuse method which concerns on Embodiment 5 of this invention. It is a flowchart of the resource reuse method which concerns on Embodiment 6 of this invention. It is a flowchart of the resource reuse method which concerns on Embodiment 7 of this invention.

Hereinafter, the technical solution according to the embodiment of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiment of the present invention. Obviously, the embodiments described are only part, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort shall be within the scope of protection of the present invention.

First, an application scenario of an embodiment of the present invention will be described with reference to FIG. As shown in FIG. 1, a plurality of D2D devices (UE A, UE B, UE C, UE D, and UE E shown in the figure) seek resources from the resource pool. In scenarios with network coverage, the resource pool is the entire block of resources isolated from Evolved Node B (abbreviated as "eNB"), and all D2D devices are small blocks of resources throughout the resource block. Conflict. Resources for all blocks can be obtained by reusing uplink spectrum resources or downlink spectrum resources in the communication network. However, in order to avoid interference with terminals in existing networks, D2D communication links generally reuse uplink spectral resources. An uplink spectrum resource means a link from the UE to the evolved NodeB, where the UE competes for the uplink spectrum resource. In a scenario without network coverage, a resource pool is a block of predetermined system bandwidth that a D2D device can acquire, and all D2D devices compete for resources under a given resource.

Embodiment 1
The embodiment provides a resource reuse device. This device may be provided in the first user device, and the first user device may be a D2D device. As shown in FIG. 2, this device is
A monitoring module 101 configured to monitor free resources and obtain a first free resource set,
A declaration module 102 configured to declare the use of the first resource in the first cycle, the first resource being a resource of the first free resource set acquired by the monitoring module 101. Declaration module 102 and
The determination module 103 is configured to determine whether or not the first resource exists in the first declaration target resource set, and the first declaration target resource set is different from the first user device. Judgment module 103, which is a set of resources declared to be used by the user equipment of
A transmission module 104 configured to transmit data using the first resource in the second cycle when the first resource does not exist in the first declarative resource set.
To be equipped.
The declaration module 102 is further configured to declare the use of the second resource in the second cycle when the first resource is present in the first set of resources to be declared. The second resource is a resource included in the first free resource set and different from the first resource, and the second cycle is the cycle following the first cycle. Alternatively, it is configured to redeclare the resource after at least one cycle after the first cycle.

In the present embodiment of the present invention, the relationship between the free resource detected by the UE (first free resource set) and the free resource declared by another device (first declaration target resource set) is determined. When a resource declared by the first user device conflicts with a resource declared by another UE, the first free resource set (free resource set detected by the first user device) and the first declaration target. The resources to be declared are selected according to the resource set (resources declared to be used in the first cycle by another user device other than the first user device). Therefore, the possibility of contention between UEs when a UE acquires a resource and the delay in resource acquisition are reduced, and the utilization of system resources is improved.

Embodiment 2
The embodiment provides a resource reuse device. This device may be provided in the first user device, and the first user device may be a D2D device. As shown in FIG. 3, this device is
A monitoring module 201 configured to monitor free resources and obtain a first set of free resources,
A declaration module 202 configured to declare the use of the first resource in the first cycle, the first resource being a resource of the first free resource set acquired by the monitoring module 201. Declaration module 202 and
The determination module 204 is configured to determine whether or not the first resource exists in the first declaration target resource set, and the first declaration target resource set is another device other than the first user device. Judgment module 204, which is a set of resources declared to be used by the user equipment of
A transmission module 205 configured to transmit data using the first resource in the second cycle when the first resource does not exist in the first declarative resource set.
To be equipped.
The declaration module 202 is further configured to declare the use of the second resource in the second cycle when the first resource is in the first set of resources to be declared. The second resource is a resource included in the first free resource set and different from the first resource, and the second cycle is the cycle following the first cycle. Alternatively, it is configured to redeclare the resource after the first cycle and after at least one cycle interval.

In the embodiment of this embodiment, the device is further
The determination module 203, which is configured to determine the resources declared to be used in the first cycle by another user device other than the first user device and acquire the first set of resources to be declared.
May be equipped.

In another embodiment of the present embodiment, when the first resource exists in the first declaration target resource set, the declaration module 202 first follows the first free resource set and the first declaration target resource set. It may be configured to select a second resource from the free resource set of and declare the use of the second resource in the second cycle.

Optionally, as shown in FIG. 3a, the declaration module 202
A first declaration unit 2021 configured to select a resource as a second resource from A- (A∩B), where A represents the first free resource set and B is the first declaration target. First declarative unit 2021, representing a resource set,
May have.

Optionally, as shown in FIG. 3b, the declaration module 202
In the first resource set to be declared, the first statistical unit 2022 is configured to statistic the declaration information of each resource, and the declaration information includes the number of declarations of each resource and the user device that declares each resource. The first statistical unit 2022, which includes one or more of the number of, the signal power of the user equipment that declared each resource, and the interference of the user equipment that declared each resource.
A second declarative unit 2023 configured to select a second resource from a first free resource set according to the declarative information of each resource statistic by the first statistical unit 2022.
May have.

Further, the second declaration unit 2022
From the first free resource set, the resource with the smallest number of declarations is selected as the second resource, or the resource corresponding to the minimum number of user devices in the first free resource set is selected as the second resource. The resource with the lowest signal power in the first free resource set is used as the second resource, or the resource with the least signal interference in the first free resource set is used as the second resource. It may be configured to be used as a resource for.

As can be easily seen, in another embodiment, the declaration module 202 selects the second resource directly from the first free resource set when the first resource exists in the first declaration target resource set. In the second cycle, it may be configured to declare the use of the second resource. The second resource is a resource different from the first resource.

In yet another embodiment of this embodiment, as shown in FIG. 3c, the declaration module 202
In the first resource set to be declared, the second statistical unit 2024 configured to statistic the number C of the user devices that declared the first resource and generate a random number r in the range of [1, C]. ,
With a third declarative unit 2025 configured to redeclare the resource after r cycles after the first cycle,
May have.

As you can easily see, the method by which the third declarative unit 2025 redistributes a resource is:
A step of selecting a third resource from the first free resource set and declaring the use of the third resource, or
It is a step of selecting a third resource from the second free resource set and declaring the use of the third resource, in which the monitoring module performs r times after the first cycle. A set of free resources, a step, obtained by re-monitoring free resources after a cycle.
May include.

In yet another embodiment of this embodiment, the declaration module 202
After at least one cycle after the first cycle, a fourth declarative unit configured to select a third resource from the first free resource set and declare the use of the third resource, or ,
A fifth declarative unit configured to select a third resource from the second free resource set and declare the use of the third resource after at least one cycle after the first cycle. The second free resource set is the fifth declarative unit, which is the free resource set obtained by the monitoring module re-monitoring the free resources after at least one cycle after the first cycle.
May have.

In yet another embodiment of this embodiment, the declaration module 202 is further described.
It may be configured to select a resource from A- (A∩B) as the first resource before declaring the use of the first resource in the first cycle, where A selects the first free resource set. Represented, B represents the first set of resources to be declared, or randomly selects a resource as the first resource from the first free resource set before declaring the use of the first resource in the first cycle. Or from the first free resource set according to the declaration information of each resource in the first declared target resource set before declaring the use of the first resource in the first cycle. It may be configured to select one resource, and the declaration information includes the number of declarations of each resource, the number of user devices that declare each resource, the signal power of the user device that declares each resource, and each resource. It is one or more of the declared interferences of the user equipment.

In the present embodiment of the present invention, the relationship between the free resource detected by the UE (first free resource set) and the free resource declared by another device (first declaration target resource set) is determined. When a resource declared by the first user device conflicts with a resource declared by another UE, the first free resource set (the free resource set detected by the first user device) and the first declaration target. According to the resource set (resources declared to be used in the first cycle by another user device other than the first user device), the first user device randomly enters into resource contention after at least one cycle. Choose to rejoin. In this way, contention backoff is performed on the declared resource, reducing the possibility of contention between UEs when the UE acquires the resource and the delay in resource acquisition, and improving the utilization of system resources. Let me.

Embodiment 3
Embodiments of the present invention further provide user equipment. As shown in FIG. 4, the user device 300 includes a transmission unit 301, a memory 302, and a processor 303. Those skilled in the art will not be limited to the structure shown in FIG. 4, and the equipment may contain more or fewer parts than those shown in FIG. 4, or a combination of several parts. It will also be appreciated that different component arrangements may be present.

The transmission unit 301 is configured to transmit data. The memory 302 is configured to store instructions and data.

Next, the details of the components of the user device 300 will be described with reference to FIG.

The memory 302 may be configured to store software programs and application modules. The processor 303 executes various functions and applications of the user device 300 by executing software programs and application modules stored in the memory 302, and performs data processing. The memory 302 may mainly have a program storage area and a data storage area. The program storage area may store an operating system, an application program required by at least one function, and the like. In the data storage area, data (for example, free resource information) created according to the process executed by the user device 300 may be stored. Further, the memory 302 may include a high speed RAM (Random Access Memory), for example a non-volatile memory such as at least one magnetic disk storage component, a flash memory component, or another volatile. May include a sex solid state storage component.

The processor 303 is the control center of the user device 300, and connects each part of the user device 300 by using various interfaces and circuits. The processor 303 may be an integrated circuit chip and may have signal processing capability. In the implementation process, the steps of the method described above may be performed using the hardware integrated logic circuit of processor 303, or may be performed using instructions in the form of software. Such instructions may be implemented and controlled by processor 303, which are used to perform the methods disclosed in embodiments of the present invention. The processor 303 described above is further a general purpose processor, a digital signal processor (DSP), an application specific integrated circuit, a field programmable gate array (FPGA), or another programmable. It can be a logic device, a discrete gate or transistor logic device, or an individual hardware component.

Specifically, by operating or executing the software program and application module stored in the memory 302 and calling the data stored in the memory 302, the processor 303 can be used.
The process of monitoring free resources and acquiring the first free resource set,
The process of declaring the use of the first resource in the first cycle, the first resource being the resource of the first free resource set, and the process.
It is a step of determining whether or not the first resource exists in the first declaration target resource set, and the first declaration target resource set is declared to be used by another user device other than the first user device. The process, which is a set of resources to be done,
When the first resource exists in the first resource set to be declared, in the second cycle, it is a step of declaring the use of the second resource, and the second resource is in the first free resource set. A resource that is different from the included first resource, the second cycle is the next cycle of the first cycle, the process, or the resource is redeclared after at least one cycle after the first cycle. Steps to do or
If the first resource does not exist in the first resource set to be declared, in the second cycle, the process of transmitting data using the first resource and the process of transmitting data,
To execute.

Further, the processor 303 is further subjected to a first cycle by another user device other than the first user device before the step of determining whether or not the first resource exists in the first declared resource set. It is configured to determine which resources are declared to be used and perform the process of acquiring the first set of resources to be declared.

Further, when the first resource exists in the first declaration target resource set, the processor 303 further increases the first free resource set to the second according to the first free resource set and the first declaration target resource set. It is configured to perform the process of selecting a resource and declaring the use of the second resource in the second cycle.

Optionally, the processor 303 is further configured to perform a step of selecting a resource from A- (A∩B) as a second resource. A represents the first free resource set, and B represents the first declaration target resource set.

Optionally, the processor 303 is a step of statistically stats the declaration information of each resource in the first resource set to be declared, and the declaration information includes the number of declarations of each resource and the number of user devices that declare each resource. From the first free resource set to the second, according to the process and the declaration information of each resource, including one or more of the signal power of the user device that declared each resource and the interference of the user device that declared each resource. The process of selecting resources and is configured to perform.

Further, the processor 303 further selects a resource having the minimum number of declarations as a second resource from the first free resource, or a resource corresponding to the minimum number of user devices in the first free resource set. Is used as the second resource, or the resource having the lowest signal power in the first free resource set is used as the second resource, or the signal interference is minimized in the first free resource set. It is configured to perform a process of using a resource as a second resource.

Further, the processor 303 further selects a third resource from the first free resource set and declares the use of the third resource after at least one cycle after the first cycle, or a third. After at least one cycle after one cycle, re-monitor free resources to get a second free resource set, select a third resource from the second free resource set, and of the third resource. It is configured to perform the process of declaring use.

Optionally, the processor 303 further generates a random number r in the range of [1, C] and a step of statisticizing the number C of the user devices that declared the first resource in the first resource set to be declared. After r cycles after one cycle, the process of redeclaring the resource, and so on, are configured to be performed.

Optionally, processor 303 further selects a resource from A- (A∩B) as the first resource before declaring the use of the first resource in the first cycle, where A is the first. 1 free resource set, B represents the first declared target resource set, the first from the first free resource set before declaring the use of the first resource in the process or the first cycle. The first free resource according to the declaration information of each resource in the first declaration target resource set before declaring the use of the first resource in the process of randomly selecting a resource as the resource of the first cycle or in the first cycle. In the process of selecting the first resource from the set, the declaration information includes the number of declarations of each resource, the number of user devices that declare each resource, the signal power of the user device that declares each resource, and each resource. The process, which includes one or more of the interferences of the user equipment that declared the above, is configured to be performed.

In the present embodiment of the present invention, the relationship between the free resource detected by the UE (first free resource set) and the free resource declared by another device (first declaration target resource set) is determined. When a resource declared by the first user device conflicts with a resource declared by another UE, the first free resource set (the free resource set detected by the first user device) and the first declaration target. According to the resource set (resources declared to be used in the first cycle by another user device other than the first user device), the first user device randomly enters into resource contention after at least one cycle. Choose to rejoin. In this way, contention backoff is performed on the declared resource, reducing the possibility of contention between UEs when the UE acquires the resource and the delay in resource acquisition, and improving the utilization of system resources. Let me.

Embodiment 4
The embodiment provides a resource reuse method. The method may be performed by a first user device, which may be a D2D device. As shown in FIG. 5, the method includes the following steps.

Step 401: The first user device monitors the free resources and acquires the first free resource set.

Specifically, when a user device requests acquisition of a resource, the user device needs to monitor the resource. The monitoring process primarily involves detecting signal energy and determining whether the time-frequency energy block is an available free resource according to whether the signal energy level exceeds a certain threshold. The first user device may employ Carrier Sense Multiple Access (CSMA) technology to monitor and access free resources.

Note that step 401 may be executed once in each cycle, or may be executed once at intervals of a plurality of cycles. This cycle is a predetermined cycle. As shown in FIG. 6, each cycle contains a plurality of time frequency resources, and each time frequency resource has an ID. Some of the time frequency resources are declarative channels used by each D2D device to declare the resources used. The declaration channel includes at least one time frequency resource block in which multiple UEs randomly select resources for declaration, and the content of the declaration includes the ID of the time frequency resource block used. Optionally, the content of the declaration may further include the ID of the UE to declare. Time-frequency resources, excluding the declarative channel for each cycle, are used by each D2D device to transmit data.

Step 402: In the first cycle, declare the use of the first resource. The first resource is a resource of the first free resource set.

Step 403: Determine if the first resource exists in the first declarative resource set. The first declaration target resource set is a set of resources declared to be used by another user device other than the first user device. If the first resource exists in the first declaration target resource set, step 404 is executed. If the first resource does not exist in the first declaration target resource set, step 405 is executed.

Step 404: In the second cycle, declare the use of the second resource. The second resource is a resource included in the first free resource set and different from the first resource, and the second cycle is the cycle following the first cycle. Alternatively, redeclare the resource after at least one cycle after the first cycle.

Specifically, the second resource may be any one of resources different from the first resource selected from the first free resource set, or the first free resource set and the first. It may be a resource different from the first resource, which is determined according to the resource set to be declared in 1 (see Embodiments 5 and 6).

Step 405: In the second cycle, the data is transmitted using the first resource.

The first user device may transmit data using the first resource in several consecutive cycles from the second cycle. In this case, another user device detects that the first resource is in the occupied (non-free) state. When the first user device stops transmitting data in a specific cycle, the first resource is released and returns to the resource pool.

In the present embodiment of the present invention, the relationship between the free resource detected by the UE (first free resource set) and the free resource declared by another device (first declaration target resource set) is determined. If a resource declared by the first user device conflicts with a resource declared by another UE, the first user device sets another resource for declaration by the first free resource set (first user). Select from a free resource set detected by the device) or redeclare the resource after at least one cycle interval. In this way, contention backoff is performed to reduce the possibility of contention between UEs when the UE acquires resources and the delay in resource acquisition, and improve the utilization of system resources.

Embodiment 5
The embodiment provides a resource reuse method. The method may be performed by a first user device, which may be a D2D device. This method is especially applicable when there are few UEs and many resources. As shown in FIG. 7, a resource that does not belong to the resource set B to be declared exists in the free resource set A. As shown in FIG. 8, the method includes the following steps.

Step 5011: The first user device monitors the free resources and acquires the first free resource set A.

Specifically, the first user device may monitor free resources using CSMA technology.

Note that step 501 may be executed once in each cycle, or may be executed at intervals of a plurality of cycles. The free resource set obtained by re-monitoring after the interval of multiple cycles is a new free resource set, and the free resources of the new free resource set are highly real-time.

Step 502: Select a resource as the first resource from the first free resource set A and declare the use of the first resource in the first cycle.

Specifically, the selection of the first resource in step 502 may be carried out by the following method.

Method 1: The resource from A- (A∩B) is selected as the first resource. A represents the first free resource set, and B represents the first declaration target resource set. In this method, step 503 is executed prior to step 502.

Method 2: The resource is randomly selected as the first resource from the first free resource set. In this method, step 502 is executed prior to step 503.

In the implementation process, Method 2 is similar to the prior art, where resources are randomly selected for declaration without resource selection, and available free resources may be obtained directly. Compared with Method 1, Method 2 can save time. However, when method 2 is adopted, the possibility of conflict between the resource selected by the UE and the resource selected by another device is relatively high, and multiple cycles are required for the UE to compete for the available resources. May become. When there are few UEs and many resources, there is a relatively high possibility that the resources available in Method 1 will be acquired directly.

Step 503: A resource whose use is declared to be used in the first cycle by another user device other than the first user device is determined, and the first declaration target resource set B is acquired.

That is, the first declaration target resource set B is a set of resources whose use is declared by another user device other than the first user device.

Note that step 503 is an arbitrary step. Alternatively, another device may determine the first declarative resource set B and send the first declarative resource set B to the first user device.

Step 504: Determine if the first resource exists in the first declaration target resource set B. If the first resource exists in the first declaration target resource set, step 505 is executed. If the first resource does not exist in the first declaration target resource set, step 506 is executed.

Specifically, in the same cycle, there may be multiple UEs competing for free resources at the same time, and the first user device determines the resources declared to be used by another UE and makes a comparison. There is a need. If the same resource is declared by multiple UEs, each of the multiple UEs abandons this resource and re-conflicts in the next cycle.

Step 505: Select the second resource from the first free resource set A according to the first free resource set A and the first declared target resource set B, and use the second resource in the second cycle. declare.

In this embodiment, step 505 may include selecting a resource from A- (A∩B) as the second resource and declaring the use of the second resource in the second cycle. A represents the first free resource set, and B represents the first declaration target resource set. The second resource is a resource different from the first resource, and the second cycle is the cycle following the first cycle.

Specifically, when the first resource exists in the first declaration target resource set, it indicates that the resource declared by another UE is the same as the resource declared by the first user device. In this case, a connection conflict occurs and the first user device needs to select a new free resource for declaration in the next cycle. In this embodiment, selections are made for the declared resources in order to reduce the probability of conflict. The selection method is to select a resource that has not been declared by another user device from the first free resource set. Therefore, there is a high possibility that the available free resources can be acquired in the next cycle.

Step 506: In the second cycle, the data is transmitted using the first resource.

Specifically, when the first resource does not exist in the first declaration target resource set, it indicates that the first resource selected by the first user device is not declared by another user device. The first user device may transmit data using the first resource in several consecutive cycles from the second cycle. In this case, another user device detects that the first resource is in the occupied (non-free) state. When the first user device stops transmitting data in a specific cycle, the first resource is released and returns to the resource pool.

In the present embodiment of the present invention, the relationship between the free resource detected by the UE (first free resource set) and the free resource declared by another device (first declaration target resource set) is determined. If the resource declared by the first user device conflicts with the resource declared by another UE, the first free resource set A (the free resource set detected by the first user device) and the first declaration According to the target resource set B (resources declared to be used in the first cycle by another user device other than the first user device), resources not declared by another user device are selected for declaration. The resource to be declared is selected. It reduces the possibility of contention between UEs when a UE acquires a resource and the delay in acquiring the resource, and improves the utilization of system resources.

Embodiment 6
As shown in FIG. 9, the embodiment provides a resource reuse method. The method may be performed by a first user device, which may be a D2D device. In this method, resources are further selected for declaration according to the declaration information of each free resource. This method is particularly applicable when there are many UEs and few resources (for example, when the set A- (A∩B) is empty). The method includes the following steps.

Step 601: The first user device monitors the free resources and acquires the first free resource set.

Specifically, when the UE requests the acquisition of a resource, the UE needs to monitor the resource. The monitoring process primarily involves signal energy detection, which determines whether the time frequency energy block is an available resource according to the signal energy level. The first user equipment may monitor free resources using CSMA technology.

Note that step 601 may be executed once in each cycle, or may be executed at intervals of a plurality of cycles. The free resource set obtained by re-monitoring after the interval of multiple cycles is a new free resource set, and the free resources of the new free resource set are highly real-time.

Step 602: Select the first resource from the first free resource set and declare the use of the first resource in the first cycle.

Specifically, the selection of the first resource in step 602 may be carried out by the following method.

Method 1: In the first declaration target resource set B, the declaration information of each resource is statistic. The declaration information includes one or more of the number of declarations of each resource, the number of user devices declaring each resource, the signal power of the user device declaring each resource, and the interference of the user device declaring each resource. .. The first resource is selected from the first free resource set according to the declaration information of each resource.

Further, the step of selecting the first resource from the first free resource set according to the declaration information of each resource is the step of selecting the resource having the minimum number of declarations as the first resource from the first free resource set. Or, from the first free resource set, the step of selecting the resource corresponding to the minimum number of user devices as the first resource, or from the first free resource set, the signal power (for example, the reference signal (RS)). , Reference Signal) The step of selecting the resource with the lowest RSRP (Reference Signal Receive Power)) obtained by performing simple energy detection as the first resource, or the first A step of selecting a resource having the smallest declared signal interference (interference intensity obtained by detecting a reference signal (RS, Reference Signal)) as a first resource from the free resource set of. In this method, step 603 is executed prior to step 602.

Method 2: The resource is randomly selected as the first resource from the first free resource set. In this method, step 602 is executed prior to step 603.

In the implementation process, Method 2 is similar to the prior art, where resources are randomly selected for declaration without resource selection, and available free resources may be obtained directly. Compared with Method 1, Method 2 can save time. However, this embodiment is applied when there are many UEs and few resources, and all the resources declared by each UE in the first cycle conflict with the resources of the first free resource set. The probability of obtaining the resources available in Method 2 is very low. In method 1, selection is made for each free resource, and the optimum resource is selected for declaration according to the declaration information, so that the probability of obtaining available resources is relatively high.

Step 603: A resource whose use is declared to be used in the first cycle by another user device other than the first user device is determined, and the first declaration target resource set is acquired.

That is, the first declaration target resource set is a set of resources whose use is declared by another user device other than the first user device.

Note that step 603 is an arbitrary step. Alternatively, another device may determine the first declarative resource set and send the first declarative resource set to the first user device.

Step 604: Determine if the first resource exists in the first declaration target resource set. If the first resource exists in the first declaration target resource set, step 605 is executed. If the first resource does not exist in the first declaration target resource set, step 606 is executed.

Specifically, in the same cycle, there may be multiple UEs competing for free resources at the same time, and the first user device determines the resources declared to be used by another UE and makes a comparison. There is a need. If the same resource is declared by multiple UEs, each of the multiple UEs abandons this resource and re-conflicts in the next cycle.

Step 605: Select the second resource from the first free resource set A according to the first free resource set A and the first declared target resource set B, and use the second resource in the second cycle. declare.

In the present embodiment, step 605 is a step of statistic of the declaration information of each resource in the first resource set to be declared, and the declaration information includes the number of declarations of each resource and the user device that declares each resource. From the first free resource set according to the steps and the declaration information of each resource, including one or more of the number, the signal power of the user device that declared each resource, and the interference of the user device that declared each resource. It may include a step of selecting two resources and a step of declaring the use of the second resource in the second cycle. The second resource is a resource different from the first resource, and the second cycle is the cycle following the first cycle.

Further, if the declaration information contains a plurality of types of information, the second resource may be selected by sequentially using the plurality of types of information in a predetermined order. For example, assume that the declaration information includes the number of declarations of each resource, the number of user devices that have declared each resource, and the signal power and signal interference of the user devices that have declared each resource. First, the number of declarations of each resource is compared in order, and the resource with the smallest number of declarations may be selected. If the number of declarations is the same, the number of user devices that declare each resource may be further compared, and the resource with the smallest number of declared user devices may be selected. When the number of user devices that declare each resource is the same, the signal powers of the user devices declared for each resource are further compared, and a resource with a relatively weak signal power of the declared user device may be selected. If the signal power of the user equipment declared for each resource is the same, finally, the signal interference of the user equipment that declared each resource is further compared, and the resource with relatively weak signal interference of the declared user equipment is selected. ..

Specifically, when the first resource exists in the first declaration target resource set, it indicates that the resource declared by another UE is the same as the resource declared by the first user device. In this case, a connection conflict occurs and the first user device needs to select a new free resource for declaration in the next cycle. In this embodiment, selections are made for the declared resources in order to reduce the probability of conflict. The selection method is to select the optimum resource for declaration from the first free resource set according to the declaration information. Therefore, it is relatively likely that you will be able to get available free resources in the next cycle.

Step 606: In the second cycle, the data is transmitted using the first resource.

Specifically, when the first resource does not exist in the first declaration target resource set, it indicates that the first resource selected by the first user device is not declared by another user device. The first user device may transmit data using the first resource in several consecutive cycles from the second cycle. In this case, another user device detects that the first resource is in the occupied (non-free) state. When the first user device stops transmitting data in a specific cycle, the first resource is released and returns to the resource pool.

In the present embodiment of the present invention, the relationship between the free resource detected by the UE (first free resource set) and the free resource declared by another device (first declaration target resource set) is determined. When a resource declared by the first user device conflicts with a resource declared by another UE, the first free resource set (free resource set detected by the first user device) and the first declaration target. According to the resource set (resources declared to be used in the first cycle by another user device other than the first user device), the declaration information of the free resources monitored and acquired by the first user device is statistic. The most suitable resource is selected for declaration according to the declaration information, and the resource to be declared is selected. It reduces the possibility of contention between UEs when a UE acquires a resource and the delay in acquiring the resource, and improves the utilization of system resources.

Embodiment 7
As shown in FIG. 10, the embodiment provides a resource reuse method. The method may be performed by a first user device, which may be a D2D device. In this method, a backoff is performed after a connection conflict occurs, and the resource is randomly redistributed after some cycle interval. This method is particularly applicable when there are many UEs and few resources (for example, when the set A- (A∩B) is empty). The method includes the following steps.

Step 701: The first user device monitors the free resources and acquires the first free resource set.

Specifically, when the UE requests the acquisition of a resource, the UE needs to monitor the resource. The monitoring process primarily involves signal energy detection, which determines whether the time frequency energy block is an available resource according to the signal energy level. The first user equipment may monitor free resources using CSMA technology.

Note that step 701 may be executed once in each cycle, or may be executed at intervals of a plurality of cycles. The free resource set obtained by re-monitoring after the interval of multiple cycles is a new free resource set, and the free resources of the new free resource set are highly real-time.

Step 702: Select the first resource from the first free resource set and declare the use of the first resource in the first cycle.

Step 703: A resource whose use is declared to be used in the first cycle by another user device other than the first user device is determined, and the first declaration target resource set is acquired.

That is, the first declaration target resource set is a set of resources whose use is declared by another user device other than the first user device.

Note that step 703 is an arbitrary step. Alternatively, another device may determine the first declarative resource set and send the first declarative resource set to the first user device.

Step 704: Determine if the first resource exists in the first declaration target resource set. The first resource is a resource declared to be used by the first user device in the first cycle. If the first resource exists in the first declaration target resource set, step 705 is executed. If the first resource does not exist in the first declarative resource set, step 706 is performed.

Specifically, in the same cycle, there may be multiple UEs competing for free resources at the same time, and the first user device determines the resources declared to be used by another UE and makes a comparison. There is a need. If the same resource is declared by multiple UEs, each of the multiple UEs abandons this resource and re-conflicts in the next cycle.

Step 705: Redeclare the resource after at least one cycle after the first cycle.

Specifically, the resource may be redistributed in two ways. First, a third resource is selected from the first free resource set and declared to be used. Second, the free resources are re-monitored, the second free resource set is acquired, the third resource is selected from the second free resource set, and the use is declared. Method 1 means that a new resource is selected for declaration from the first free resource set after some cycles have been bypassed. The declared resource is detected before several cycles. Method 2 means that after some cycles have been circumvented, the free resources are re-monitored and real-time updates are made to the free resource set. In this case, the resource of the free resource set does not have to be a resource that did not originally exist in the first free resource set.

In the present embodiment, step 705 is a step of statistic of the number C of the user devices declaring the first resource in the first resource set to be declared, and a step of generating a random number r in the range of [1, C]. And after r cycles after the first cycle, the step of redeclaring the resource may be included.

Specifically, when the first resource exists in the first declarative resource set, it indicates that the resource declared by another UE is the same as the resource declared by the first user device. In this case, a conflict conflict occurs. In order to reduce the probability of competition, in this embodiment, a competition backoff is executed, specifically, r times of competition cycles are avoided. In step 705, when a large number of user devices declare the same resource as the resource declared by the first user device, that is, when C is relatively large, the number of UEs is relatively large, competition is fierce, and r is. It means that it may be randomly assigned to a large value with a relatively high probability. Therefore, the first user device stops declaring the resource in more contention cycles and temporarily withdraws from the resource contention.

Step 706: In the second cycle, the data is transmitted using the first resource.

Specifically, when the first resource does not exist in the first declaration target resource set, it indicates that the first resource selected by the first user device is not declared by another user device. The first user device may transmit data using the first resource in several consecutive cycles from the second cycle. In this case, another user device detects that the first resource is in the occupied (non-free) state. When the first user device stops transmitting data in a specific cycle, the first resource is released and returns to the resource pool.

In the resource reuse method provided in the embodiment of the present invention, the method of selecting the first resource before declaring the use of the first resource in the first cycle is from A- (A∩B). A step of selecting a resource as the first resource, where A represents the first free resource set and B represents the first set of resources to be declared. The step or the first from the first free resource set. The step of randomly selecting a resource as a resource of the above, or the step of selecting the first resource from the first free resource set according to the declaration information of each resource, the declaration information includes the number of declarations of each resource and the number of declarations. The process includes one or more of the number of user devices declaring each resource, the signal power of the user device declaring each resource, and the interference of the user device declaring each resource. As can be easily seen, the resource reuse method provided in the above embodiment can combine three methods for selecting resources for declaring in different cycles from the first free resource set. Therefore, the object of the present invention is still achieved, and the above-described embodiments do not limit the present invention.

In the embodiment of the present invention, the relationship between the free resource detected by the UE (first free resource set) and the free resource declared by another device (first declaration target resource set) is determined. When a resource declared by the first user device conflicts with a resource declared by another UE, the first free resource set (the free resource set detected by the first user device) and the first declaration target. According to the resource set (resources declared to be used in the first cycle by another user device other than the first user device), the first user device randomly enters into resource contention after at least one cycle. Choose to rejoin. In this way, contention backoff is performed on the declared resource, reducing the possibility of contention between UEs when the UE acquires the resource and the delay in resource acquisition, and improving the utilization of system resources. Let me.

When the resource reusing device provided in the above-described embodiment competes for resources, the division of the functional module is only used as an example for explanation. In practical applications, the above functions may be assigned to different functional modules and implemented according to requirements. That is, the internal structure of the device may be divided into different functional modules to realize all or part of the above-mentioned functions. Further, the resource reuse device provided in the above-described embodiment belongs to the same concept as the embodiment of the resource reuse method. The specific implementation process is referred to in the embodiment of the method, and details are not described here.

The order of the above-described embodiments of the present invention is for illustration purposes only and is not intended to indicate the priority of the embodiments.

Those skilled in the art will appreciate that all or part of the steps of the embodiment can be accomplished by a program that directs the hardware or related hardware. The program may be stored on a computer-readable storage medium. The storage medium may include a read-only memory, a magnetic disk or an optical disk.

The above description is merely an exemplary embodiment of the present invention and does not limit the present invention. Changes, equal exchanges and improvements made without departing from the gist and principles of the present invention shall be included in the scope of protection of the present invention.

Claims (11)

A user device equipped with a transmitter, memory, and processor.
The transmitter is configured to transmit data.
The memory is configured to store instructions and data.
The processor is:
The process of monitoring free resources and acquiring the first free resource set,
To determine the resources to be declared for use in the first cycle by another user device other than the front Kiyu chromatography The device, the method comprising: obtaining a first declaration resource set, wherein the first declaration object resource set is a set of resources declared used by another user equipment other than the front Kiyu chromatography the device, comprising the steps,
It is a step of determining whether or not the first resource exists in the first declaration target resource set, and the first resource is a resource of the first free resource set. Is configured as
When the first resource does not exist in the first declaration resource set, and the transmission unit, in the second cycle, and transmits data by using the first resource,
The processor further selects a new resource when the first resource is present in the first declared resource set and declares the new resource after at least one cycle after the first cycle. The new resource is selected from A- (A∩B), where A represents the first free resource set and B represents the first declarative resource set.
User device. The first aspect of claim 1, wherein the processor is further configured to declare the use of the first resource in the first cycle, the first resource being a resource of the first free resource set. User device. Wherein the processor further, Ru is configured to select a resource as the first resource from A- (A∩B),
The user device according to claim 1. The processor further
In the first declaration target resource set, statistics on the number C of the user devices that declared the first resource are collected.
It is configured to generate a random number r in the range [1, C] and declare the new resource after the period of r cycles after the first cycle.
The user device according to claim 1. The processor further
It is configured to select a third resource from the first free resource set and declare the use of the third resource, or
Re-monitor free resources to get a second free resource set,
It is configured to select a third resource from the second free resource set and declare the use of the third resource.
The user device according to claim 1. It ’s a resource reuse method.
A step in which the first user device monitors free resources and acquires the first free resource set.
A step of determining a resource declared to be used in the first cycle by another user device other than the first user device and acquiring a first declaration target resource set, which is the first declaration target. A resource set is a set of resources declared to be used by another user device other than the first user device.
A step of determining whether or not the first resource exists in the first declaration target resource set, and the first resource is a resource of the first free resource set.
When the first resource does not exist in the first declared resource set, in the second cycle, a step of transmitting data using the first resource and a step of transmitting data.
When the front Symbol first resource is present in the first declaration target resource set, select the new resource from A- (A∩B), after at least one cycle after the first cycle, the In the step of declaring a new resource , A represents the first free resource set, and B represents the first resource set to be declared .
The including, METHODS. A step of declaring the use of a first resource in a first cycle, wherein the first resource is a resource of the first free resource set.
6. The method of claim 6. The method further comprises the step of selecting a resource from A- (A∩B) as the first resource .
The method according to claim 6. The step of declaring the new resource after at least one cycle after the first cycle
In the first declaration target resource set, a step of collecting statistics on the number C of user devices that have declared the first resource, and
A step of generating a random number r in the range of [1, C] and declaring the new resource after the period of r cycles after the first cycle, and
6. The method of claim 6. The step of selecting a new resource and declaring the new resource is
A step of selecting a third resource from the first free resource set and declaring the use of the third resource.
The step of including or selecting a new resource and declaring the new resource
Steps to re-monitor free resources and get a second set of free resources,
A step of selecting a third resource from the second free resource set and declaring the use of the third resource.
6. The method of claim 6. A computer-readable storage medium in which a program is recorded, wherein the program causes a computer to perform the method according to any one of claims 6 to 10.

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