CN113438625B

CN113438625B - Message transmission method and device

Info

Publication number: CN113438625B
Application number: CN202010591422.6A
Authority: CN
Inventors: 刘云; 徐海博; 王洲; 周永行
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2020-03-20
Filing date: 2020-06-24
Publication date: 2023-07-18
Anticipated expiration: 2040-06-24
Also published as: WO2021185175A1; CN113438625A

Abstract

The application provides a message transmission method and device, which can be applied to scenes such as V2X, wherein the method comprises the following steps: the method comprises the steps that direct link connection is established between first user equipment and second user equipment; the first user equipment receives a first message from the second user equipment, wherein the first message comprises the position information of the second user equipment; the first user equipment sends auxiliary information according to the position information; the auxiliary information is used to indicate resources. In the above process, the second ue carries the location information in the first message, and the first ue may determine whether to send the auxiliary information according to the location information, thereby reducing the sending frequency of the auxiliary information, reducing feedback of unnecessary auxiliary information, and improving the resource utilization rate.

Description

Message transmission method and device

Cross Reference to Related Applications

The present application claims priority from the national intellectual property agency, application number 202010203425.8, application name "a perceived method for periodic and aperiodic subscription services," filed on day 20 and 03 in 2020, the entire contents of which are incorporated herein by reference.

Technical Field

The present disclosure relates to the field of communications technologies, and in particular, to a method and an apparatus for transmitting a message.

Background

As communication technologies evolve, the internet of everything continues to accelerate, the third generation partnership project (the 3rd generation partnership project,3GPP) has introduced the services of car-to-car connectivity (Vehicle to Vehicle, V2V) and car-to-everything connectivity (Vehicle to Everything, V2X) in long term evolution (Long Term Evolution, LTE) systems and new wireless (NR) systems in order to extend the 3GPP platform to the automotive industry.

V2X may support multicast transmission as well as unicast transmission, in which transmission of messages is limited to user equipments belonging to one group. In unicast technology, the transmission of messages is limited to between two user equipments. The sender of a message is hereinafter referred to as a message originating user equipment and the receiver of the message as a message receiving user equipment. Currently, the message receiving ue may send auxiliary information to the message initiating ue, where the auxiliary information may be used to recommend resources, and the message initiating ue may determine the resources for transmitting the message according to the resources recommended by the multiple message receiving ues. Because the recommended resources are generally less-interference resources, the message initiating user equipment transmits the message according to the resources recommended by the message receiving user equipment, so that the success rate of message transmission can be improved.

However, in the case of a preferred channel, if the message receiving ue frequently transmits the auxiliary information, it is easy to cause transmission opportunity and waste of resources.

Disclosure of Invention

The application provides a message transmission method and a message transmission device, which are used for improving the resource utilization rate in multicast transmission.

In a first aspect, the present application provides a message transmission method, including: the method comprises the steps that direct link connection is established between first user equipment and second user equipment; the first user equipment receives a first message from the second user equipment, wherein the first message comprises the position information of the second user equipment; the first user equipment sends auxiliary information according to the position information; the auxiliary information is used to indicate resources.

In the above process, the second ue carries the location information in the first message, and the first ue may determine whether to send the auxiliary information according to the location information, thereby reducing the sending frequency of the auxiliary information, reducing feedback of unnecessary auxiliary information, and improving the resource utilization rate.

In a possible implementation manner, the sending, by the first user equipment, auxiliary information according to the location information includes: the first user equipment determines the distance between the first user equipment and the second user equipment according to the position information; and when the distance is greater than or equal to a first distance threshold value, the first user equipment sends the auxiliary information to the second user equipment.

In a possible implementation manner, the method further includes: the first user equipment determines the signal strength of the signal received by the second user equipment; and when the distance is smaller than the first distance threshold value and the signal strength is smaller than a first receiving signal strength threshold value, the first user equipment sends the auxiliary information to the second user equipment.

In the above method, whether to send auxiliary information is determined by the signal strength, so that the problem of turning over position information can be avoided, and the problem of inaccurate distance determined according to distance information is avoided.

In a possible implementation manner, the method further includes: and when the distance is smaller than the first distance threshold value and the signal strength is larger than or equal to a first receiving signal strength threshold value, the first user equipment determines not to send the auxiliary information to the second user equipment.

In a possible implementation manner, the first user equipment determines a signal strength of a signal of the second user equipment, including: the first user equipment measures the first message to obtain a Received Signal Strength Indication (RSSI) or a Reference Signal Received Power (RSRP); the first user equipment determines the RSSI or RSRP as the signal strength.

In the method, the received signal strength indication RSSI or the reference signal received power RSRP is obtained through measurement, so that the accurate signal strength can be obtained, and the judgment accuracy is improved.

In a possible implementation manner, the method further includes: and when the distance is smaller than the first distance threshold value, the first user equipment determines not to send the auxiliary information to the second user equipment.

In a possible implementation manner, the first distance threshold value is carried by the first message; alternatively, the first distance threshold value is preconfigured; alternatively, the first distance threshold is configured by the network device through higher layer signaling.

In a possible implementation manner, the location information is an area reference number of an area where the second user equipment is located.

In a possible implementation manner, the method further includes: the first user equipment sends a second message to a third user equipment, wherein the second message comprises the position information of the first user equipment.

In a second aspect, the present application also provides a communication device having means to implement any of the methods provided in the first aspect above. The communication device may be implemented by hardware, or may be implemented by hardware executing corresponding software. The hardware or software includes one or more units or units corresponding to the functions described above.

In one possible implementation, the communication device includes: a processor configured to support the communication device to perform the corresponding functions of the first user equipment in the method shown above. The communication device may also include a memory, which may be coupled to the processor, that holds the program instructions and data necessary for the communication device. Optionally, the communication apparatus further comprises a communication interface for supporting communication between the communication apparatus and a device such as a second user equipment.

In a possible implementation manner, the communication device includes corresponding functional units, each for implementing a step in the above method. The functions may be realized by hardware, or may be realized by hardware executing corresponding software. The hardware or software includes one or more units corresponding to the above functions.

In a possible implementation manner, the communication apparatus includes a processing unit and a communication unit in a structure, where the units may perform corresponding functions in the foregoing method examples, and specific reference is made to the description in the method provided in the first aspect, which is not repeated herein.

In a third aspect, the present application provides a method comprising: the method comprises the steps that a first user equipment receives N pieces of auxiliary information, wherein the N pieces of auxiliary information are from N pieces of second user equipment, the N pieces of auxiliary information are used for indicating at least one resource, the N pieces of auxiliary information comprise position information of the N pieces of second user equipment, and N is an integer larger than 0; and the first user equipment determines resources for carrying out data transmission according to N pieces of position information corresponding to the N pieces of auxiliary information.

In the above process, the first user equipment determines the resources for data transmission according to the position information, so that the accuracy of resource selection is improved, and the resource utilization rate is improved.

In a possible implementation manner, the determining, by the first user equipment, a resource for sending multicast data according to N location information corresponding to the N pieces of auxiliary information includes: the first user equipment determines N distances according to the N position information corresponding to the N auxiliary information, wherein one distance of the N distances is the distance between the first user equipment and one second user equipment of the N second user equipment; and the first user equipment determines the resource for data transmission from the at least one resource according to the N distances.

In a possible implementation manner, the determining, by the first user equipment, the resource for performing data transmission from the at least one resource according to the N distances includes: and the first user equipment determines the resource indicated by the auxiliary information corresponding to the largest distance in the N distances as the resource for carrying out data transmission.

In a possible implementation manner, the determining, by the first user equipment, the resource for performing data transmission from the at least one resource according to the N distances includes: the first user equipment determines at least one candidate resource from the at least one resource according to the N distances; the first user equipment determines a candidate resource from the at least one candidate resource as the resource for data transmission.

In a possible implementation manner, the determining, by the first user equipment, a candidate resource includes: for any one distance of the N distances, when the distance is greater than or equal to a second distance threshold value, the first user equipment determines resources indicated by auxiliary information for determining the distance as the candidate resources.

In a possible implementation manner, the method further includes: for any one of the N distances, when the distance is smaller than the second distance threshold value and the signal strength of the auxiliary information for determining the distance is smaller than the second received signal strength threshold value, the first user equipment determines the resource indicated by the auxiliary information for determining the distance as the candidate resource.

In the above method, the candidate resource is determined by the signal strength, so that the problem of turnover of the position information can be avoided, and the problem of inaccurate distance determined according to the distance information is avoided.

In a possible implementation manner, the first user equipment determines a candidate resource from the at least one candidate resource as the resource for data transmission, including: the first user equipment takes the candidate resource with the largest corresponding distance in the at least one candidate resource as the resource for carrying out data transmission; or the first user equipment takes the candidate resource with the minimum signal strength of the corresponding auxiliary information in the at least one candidate resource as the resource for carrying out data transmission.

In a possible implementation manner, the determining, by the first user equipment, the resource for performing data transmission from the at least one resource according to the N distances includes: the first user equipment determines the weight of each resource in the at least one resource indicated by the N auxiliary information according to the N distances; the first user equipment determines the resource with the largest weight in the at least one resource as the resource for data transmission; or the first user equipment selects one resource from K resources with the largest weight as the resource for carrying out data transmission, wherein K is an integer greater than 0.

In a possible implementation manner, the determining, by the first user equipment, the resource for performing data transmission from the at least one resource according to the L distances includes: the first user equipment determines the weight of each resource in the at least one resource according to the L distances and the signal strength of each auxiliary information in the L auxiliary information; the first user equipment determines the resource with the largest weight in the at least one resource as the resource for data transmission; or the first user equipment selects one resource from K resources with the largest weight as the resource for carrying out data transmission, wherein K is an integer greater than 0.

In a possible implementation manner, the signal strength of each auxiliary information in the N auxiliary information indicates an RSSI or a reference signal received power RSRP for a received signal strength indication obtained by measuring each auxiliary information by the first user equipment.

In the method, the accurate signal strength can be obtained through the received signal strength indication RSSI or the reference signal received power RSRP, and the judgment accuracy is improved.

In a fourth aspect, the present application also provides a communications device having means for implementing any of the methods provided in the third aspect. The communication device may be implemented by hardware, or may be implemented by hardware executing corresponding software. The hardware or software includes one or more units or units corresponding to the functions described above.

In one possible implementation, the communication device includes: a processor configured to support the communication device to perform the corresponding functions of the second user equipment in the method shown above. The communication device may also include a memory, which may be coupled to the processor, that holds the program instructions and data necessary for the communication device. Optionally, the communication device further comprises a communication interface for supporting communication between the communication device and the first user equipment or the like.

In a possible implementation manner, the communication apparatus includes a processing unit and a communication unit in a structure, where the units may perform corresponding functions in the foregoing method examples, and specific reference is made to the description in the method provided in the third aspect, which is not described herein in detail.

In a fifth aspect, there is provided a method comprising: the method comprises the steps that a first user equipment receives auxiliary information from a second user equipment, wherein the auxiliary information comprises position information of the second user equipment; the auxiliary information is used for indicating resources; the first user equipment determines effective time according to the position information; the effective time is the effective time of the auxiliary information, or the effective time is the time when the first user equipment determines that the second user equipment is triggered to send the auxiliary information next time.

In the above method, the interval of transmitting the auxiliary information is controlled by the effective time, so that the transmission frequency of the auxiliary information can be reduced, unnecessary auxiliary information transmission is reduced, and the resource utilization rate is improved.

In a possible implementation manner, the determining, by the first user equipment, the valid time according to the location information includes: the first user equipment determines the distance between the first user equipment and the second user equipment according to the position information; and the first user equipment determines the effective time according to the distance.

In a possible implementation manner, the distance and the effective time meet a preset constraint relationship.

In a possible implementation manner, the method further includes: and when the effective time is the effective time of the auxiliary information, the first user equipment determines not to send a trigger message to the second user equipment within the effective time, wherein the trigger message is used for indicating the second user equipment to feed back the auxiliary information.

In a possible implementation manner, the method further includes: and the first user equipment sends a trigger message to the second user equipment after the effective time.

In a possible implementation manner, the method further includes: and the first user equipment sends the effective time to the second user equipment.

In a sixth aspect, the present application also provides a communication device having any of the methods provided in the fifth aspect. The communication device may be implemented by hardware, or may be implemented by hardware executing corresponding software. The hardware or software includes one or more units or units corresponding to the functions described above.

In a possible implementation manner, the communication apparatus includes a processing unit and a communication unit in a structure, where the units may perform corresponding functions in the foregoing method example, and specific reference is made to the description in the method provided in the fifth aspect, which is not repeated herein.

In a seventh aspect, a method for determining to transmit auxiliary information is provided, where the method includes: when the UE-B sends configuration auxiliary information resources or triggers auxiliary information transmission, carrying the position information of the UE-B, calculating the distance between the UE-A and the position information of the UE-B according to the position information of the UE-A, and sending auxiliary information when the distance is larger than a certain threshold value, wherein the threshold value is the 'no auxiliary information distance'; a received signal strength threshold is set based on the "no auxiliary information distance", and the received signal strength threshold may be configured by a higher layer or preconfigured. If the received signal strength is greater than or equal to the received signal strength threshold and the distance is smaller than the distance without auxiliary information, the UE-A does not feed back auxiliary information; if the received signal strength is smaller than the received signal strength threshold value and the distance is smaller than the distance without auxiliary information, the UE-A feeds back auxiliary information; if the distance is greater than or equal to the 'no auxiliary information distance', the UE-A feeds back auxiliary information; the folding device has the beneficial effects of solving the problem of folding the position information.

In a possible implementation manner, the "no auxiliary information distance" may be additionally carried by the trigger message sent by the UE-B, whether the trigger message may be configured by the higher layer signaling to carry the location information and/or the "no auxiliary information distance", and the specific value of the "no auxiliary information distance" may be configured by the higher layer signaling, or the range of the "no auxiliary information distance" may be configured by the higher layer signaling, and the indication of the specific value may be carried by the control signaling in the trigger message; another possibility is that a specific value or range of "no auxiliary information distance" is preconfigured and subsequently does not need to be changed.

In an eighth aspect, a method for determining to transmit auxiliary information is provided, where the method includes:

the UE-A carries position information when sending auxiliary information to the UE-B, the position information is used for determining the time for triggering the transmission of the auxiliary information next time in a unicast scene, a plurality of UE-A are enabled to send the position information to the UE-B in a multicast scene, the UE-B excludes UE-A with the distance smaller than a certain threshold value, and the UE-B preferentially considers the farther UE-A or increases the weight for the auxiliary information provided by the farther UE-A when selecting resources;

setting a receiving signal intensity threshold value, if the receiving signal intensity is larger than or equal to the receiving signal intensity threshold value and the distance is smaller than the distance threshold, the auxiliary information of the UE-A is not used for selecting the subsequent transmission resources; if the received signal strength is smaller than the received signal strength threshold value and the distance is smaller than the distance threshold, the auxiliary information of the UE-A is used for selecting the subsequent transmission resources; if the distance is greater than or equal to the distance threshold, the auxiliary information of the UE-a is used for selecting the subsequent transmission resources.

Or, the UE-B allocates weights to the resources in the auxiliary information of each UE-A according to the interval, the smaller the interval is, the smaller the weights are, the weights are further used for determining multicast resources, and the UE-B can further determine the weights according to the interval and the received signal strength value aiming at the turnover problem.

In one possible implementation, the received signal strength threshold may be configured by a higher layer, or preconfigured.

In a ninth aspect, a computer readable storage medium is provided for storing a computer program comprising instructions for performing the method of the first aspect or any one of the possible implementations of the first aspect.

In a tenth aspect, a computer readable storage medium is provided for storing a computer program comprising instructions for performing the method of the third aspect or any one of the possible implementations of the third aspect.

In an eleventh aspect, a computer readable storage medium is provided for storing a computer program comprising instructions for performing the method of the fifth aspect or any one of the possible implementations of the fifth aspect.

In a twelfth aspect, there is provided a computer program product comprising: computer program code which, when run on a computer, causes the computer to perform the method of the first aspect or any of the possible implementations of the first aspect.

In a thirteenth aspect, there is provided a computer program product comprising: computer program code which, when run on a computer, causes the computer to perform the method of any one of the possible implementations of the third aspect and the third aspect described above.

In a fourteenth aspect, there is provided a computer program product comprising: computer program code which, when run on a computer, causes the computer to perform the method of any one of the possible implementations of the fifth and fifth aspects described above.

In a fifteenth aspect, the present application provides a chip comprising a processor coupled to a memory for executing a computer program or instructions stored in the memory, which when executed by the processor cause the method of any of the first to eighth aspects to be carried out.

In a sixteenth aspect, the present application provides a communications device comprising a processor, which when executing a computer program or instructions in a memory, performs the method according to any of the first to eighth aspects.

In a seventeenth aspect, the present application provides a communications device comprising a processor and a memory for storing a computer program or instructions; the processor is configured to execute a computer program or instructions stored in the memory to cause the communication device to perform the method according to any one of the first to eighth aspects.

In an eighteenth aspect, the present application provides a communication device comprising a processor, a memory, and a transceiver for receiving signals or transmitting signals; the memory is used for storing a computer program or instructions; the processor is configured to invoke the computer program or instructions from the memory to perform the method according to any of the first to eighth aspects.

Drawings

FIG. 1 is a schematic view of a prior art region;

FIG. 2 is a schematic diagram of a prior art data transmission;

fig. 3 (a) to fig. 3 (b) are schematic diagrams of a message transmission scenario provided in an embodiment of the present application;

fig. 4 is a schematic flow chart of a message transmission method provided in an embodiment of the present application;

fig. 5 is a schematic diagram of a message transmission scenario provided in an embodiment of the present application;

FIG. 6 is a schematic view of an area provided in an embodiment of the present application;

FIG. 7 is a schematic view of an area provided in an embodiment of the present application;

fig. 8 is a schematic flow chart of a message transmission method according to an embodiment of the present application;

fig. 9 is a schematic diagram of a message transmission scenario provided in an embodiment of the present application;

fig. 10 is a schematic flow chart of a message transmission method provided in an embodiment of the present application;

fig. 11 is a schematic flow chart of a message transmission method provided in an embodiment of the present application;

fig. 12 is a schematic diagram of a message transmission scenario provided in an embodiment of the present application;

fig. 13 is a schematic flow chart of a message transmission method according to an embodiment of the present application;

fig. 14 is a schematic flow chart of a message transmission method according to an embodiment of the present application;

fig. 15 is a schematic structural diagram of a communication device according to an embodiment of the present application;

fig. 16 is a schematic structural diagram of a communication device according to an embodiment of the present application.

Detailed Description

Embodiments of the present application are described in detail below with reference to the accompanying drawings.

Prior to describing embodiments of the present application, related abbreviations and key term definitions referred to in the embodiments of the present application are introduced. Specifically, as shown in table 1, the following is a part of the relevant abbreviation in the present application.

TABLE 1

The following are some key term definitions relevant to the present application:

1. 5G New Radio (NR) profile:

5G NR is a subject recently proposed in the third Generation partnership project (the 3rd generation partnership project,3GPP) organization, located in release 14. In the last 10 years, the LTE standard proposed by the 3GPP organization has been widely used worldwide, called 4G communication technology. For example, china Mobile, china Unicom and China telecom all adopt the transmission technology of 4G LTE time division duplexing (time division duplex, TDD) and 4G LTE frequency division duplexing (frequency division duplex, FDD) modes respectively, and provide high-speed and convenient mobile network service for vast users.

As the new generation 5G technology enters the discussion phase, whether the system structure and access procedure already achieved in the original 4G LTE continue to be adopted or not is still under study. On the one hand, since the communication system is backward compatible, new technologies developed later tend to be compatible with technologies that have been standardized before; on the other hand, since 4G LTE already has a lot of existing designs, if the compatibility is achieved, much flexibility of 5G must be sacrificed, thereby degrading performance. Therefore, there is currently a parallel study in both directions in the 3GPP organization, irrespective of the backward compatible technical discussion group, called 5G NR.

2. Direct link (sidelink) technology:

the direct link may also be referred to as a side link, etc., and the names thereof are not limited in the embodiments of the present application, and are hereinafter simply referred to as direct links. As communication technology evolves, everything interconnection is also continuously accelerating, and during Release 14 and Release15, 3GPP introduced support for V2V and V2X services in LTE in order to extend the 3GPP platform to the automotive industry. NR V2X will complement LTE V2X to enable advanced V2X services and support interworking with LTE V2X.

In the sidelink, data can be directly sent between two UEs without sending the data to a base station, and then forwarding the data to a receiving UE through a core network, so that the data delay can be greatly reduced.

NR supports sidelink broadcast, multicast and unicast transmissions both in-coverage, out-of-coverage and partial coverage. The physical channels used for transmission include PSCCH, PSSCH, and PSFCH.

3. Direct link enhancement (enhancement) technique:

as mentioned previously, as communication technology evolves, everything interconnection is also continuously accelerating, 3GPP introduced support for V2V and V2X services in LTE during Release 14 and Release15 in order to extend the 3GPP platform to the automotive industry. During Release 16, the relevant design of NR V2X was studied. Further optimization will be discussed further in NR sidelink enhancement of Release 17, in particular, regarding the enhancement in resource allocation, considering the power reduction scheme proposed based on Release 14 and Release15, and further optimizing or proposing a new scheme to achieve the purpose of power reduction. In addition to this goal of reducing power consumption, improving reliability and reducing latency are two other main goals of the scheme, also based on resource allocation enhancements. For example, there are two UEs, UE a and UE B, respectively, and a set of resources is mainly transmitted to UE B for UE a, and UE B considers the set of resources transmitted from UE a during transmission. This has the advantage that UE a takes full account of the nearby interference situation, by informing UE B of a set of resources, allowing UE B to select the resources for UE a transmission among the set of resources.

4. The location information of the direct link indicates:

in the Release 16sidelink design, a concept of location information is proposed, which is mainly used to calculate the distance between two UEs. For example, there are two UEs, namely Tx UE and Rx UE, where the Tx UE carries the location information of the Tx UE in the control information when transmitting, and the Rx UE obtains the location information of the Tx UE after receiving the control information, and the Rx UE knows its own location information, and the two are subtracted to obtain the distance between the Tx UE and the Rx UE. In the use process, the Tx UE may send its own location information and send an indication information of a communication distance, where the indication information may include 4 bits and is used to indicate a certain value in a preset set, for example, the preset set to be selected is {50,80,180,200,350,400,500,700,1000}, where the indication information indicates one value as a transmission distance, and when the transmission distance between the Tx UE and the Rx UE is greater than the value, the communication between the Tx UE and the Rx UE does not need HARQ feedback, that is, does not need feedback NACK information to indicate whether the transmission at the transmitting end is successfully decoded.

In the process of making standards, the concept of position information is discussed in many ways, and a major problem is that the position information is turned over, namely, because the number of bits is limited, the position information can not be repeated in a small range, and once the position information exceeds a certain range, the position information is easy to cause repeated marks, so that the true distance between the position information and the reference mark is difficult to judge. For example, as shown in fig. 1 below, the Rx UE is in the area 5, the area 5 is located in the 2 nd row and the 2 nd column in fig. 1, the location information of the Tx UE is the area 9, the area 9 is located in the 2 nd row and the 7 th column in fig. 1, and after the Rx UE receives the message of the Tx UE, the Tx UE may be mistakenly considered to be located in the area 9 beside itself, that is, in the area 9 corresponding to the 2 nd row and the 3 rd column in fig. 1, so that the location misjudgment is caused.

Although the above-mentioned turnover problem is referred to in the discussion, the position information is finally adopted by standards, and the following application relates to the discussion of the position information in the design process, and provides a solution to the turnover problem.

Further, as described above, in order to improve reliability and reduce latency, resources may be indicated to the UE transmitting the message by the assistance information, such that the UE transmitting the message takes into account the resources indicated by the assistance information when transmitting.

The prior art can be divided into two types of triggering auxiliary information feedback or configuring periodic auxiliary information:

first kind: triggering auxiliary information feedback. For example, there are two UEs, UE-a and UE-B, respectively, and UE-B sends a trigger message (trigger info) to UE-a, the trigger message being used to instruct UE-a to send auxiliary information (assistance info). The UE-a may send auxiliary information to the UE-B according to the trigger message, the auxiliary information being used to indicate resources for data transmission. In connection with the above description, as shown in FIG. 2 below, in FIG. 2, UE-B may also be referred to as a Tx UE and UE-A may also be referred to as an Assisting-UE. In fig. 2, the UE-B may determine resources for data transmission according to the assistance information fed back by the UE-a, and perform data transmission (data transmission).

Second kind: periodic side information feedback is configured. For example, there are two UEs, UE-a and UE-B, respectively, and UE-B may configure periodic resources for UE-a, where the resources are used when the UE-a feeds back the assistance information, and the periodic resources may be transmitted once every 100ms or several seconds, and the frequency domain resources of the transmission are relatively fixed.

Based on the different channel conditions between UE-A and UE-B, it can be broadly divided into 3 classes of scenarios:

scene 1: under the condition that the channels are good, for example, the UE-A and the UE-B are positioned in the same vehicle team and are very close to each other, the channels of all sub-channels (sub-channels) are good, and resources fed back by periodic auxiliary information are configured, so that transmission opportunities and resources are wasted;

scene 2: the channel is very bad, the resource selection significance exists, but the auxiliary information can not be received, the error can only be tested for many times, and a good method is not provided for reducing the error testing cost temporarily;

scene 3: and under the conditions of good channel part and poor channel part, the auxiliary information interaction requirement is met.

In an actual scenario, the situation of the channel is not known before the auxiliary information is sent, for example, two UEs close to each other do not need to perform frequent auxiliary information transmission, no matter the auxiliary information feedback is triggered or periodic auxiliary information is configured, the scenario that the auxiliary information interaction is not performed when the two UEs are close to each other is not considered, and therefore transmission opportunities and resource waste are easily caused.

In combination with the above description, the embodiments of the present application solve the problem in the prior art that no distinction is made between two UEs, by carrying location information when both are required to communicate in the transmission process, so that the opposite end can calculate the transmission distance, thereby reducing transmission of unnecessary auxiliary information, and solving the problem in the prior art.

Specifically, the present application proposes a method for transmitting auxiliary information, in which position information is carried during auxiliary information transmission to reduce unnecessary auxiliary information transmission, which may include the following ways:

mode 1: when the UE-B transmits resources for configuring auxiliary information or triggers auxiliary information transmission, carrying the position information of the UE-B, calculating the distance between the UE-A and the position information of the UE-B according to the position information of the UE-A, and transmitting the auxiliary information when the distance is larger than a certain value;

mode 2: the UE-A carries position information when sending auxiliary information to the UE-B, the position information is used for determining the time for triggering the transmission of the auxiliary information next time in a unicast scene, a plurality of UE-A send the position information to the UE-B in a multicast scene, and the UE-B preferentially considers the farther UE-A or increases the weight for the auxiliary information provided by the farther UE-A when selecting resources;

In particular, when the location information is defined, a scheme of the location information in the prior art may be adopted, and this scheme has a problem, and in order to solve this problem, a method of further determining a distance between two UEs in a manner of combining RSRP may be adopted, which will be described in detail later.

Before describing the embodiments of the present application, a scenario to which the embodiments of the present application are applied will be described. The embodiment of the application can be applied to multicast transmission, unicast transmission and other technologies in NR.

In the embodiment of the application, the network device may be a next generation base station (next Generation node B, gNB) in the NR system, an evolved base station (evolutional node B, eNB) in the LTE system, a base station (base transceiver station, BTS) in the global system for mobile communications (global system of mobile communication, GSM) system or code division multiple access (code division multiple access, CDMA), a base station (nodeB, NB) in the wideband code division multiple access (wideband code division multiple access, WCDMA) system, or the like.

The user equipment may be an NR V2X or LTE V2X or next generation V2X supporting device, and may also be any of the following: cellular telephones, cordless telephones, session initiation protocol (Session Initiation Protocol, SIP) telephones, wireless local loop (Wireless Local Loop, WLL) stations, personal digital assistants (Personal Digital Assistant, PDA), vehicle-mounted devices, wearable devices, and the like. The user equipment may also be called a terminal device, a Pedestrian UE (PUE), a Vehicle UE (VUE), a communication device, a communication apparatus, etc., and the name of the user equipment is not limited in the embodiments of the present application.

When the application is applied to D2D, V2V and V2X, the user equipment may be an in-vehicle device. For example, fig. 3 (a) and fig. 3 (b) are schematic diagrams of a scenario suitable for use in embodiments of the present application. In FIGS. 3 (a) and 3 (B), two UEs are included, UE-A and UE-B, respectively, e.g., UE-A may be a PUE and UE-B may be a VUE. In a possible scenario, where UE-a and UE-B are in direct link communication, both are not located within the gcb coverage area, a message/configuration message may be triggered to UE-a for indicating feedback assistance information before UE-B performs data transmission. The UE-a may send auxiliary information to the UE-B according to the trigger/configuration message of the UE-B, which may be used to indicate the resources for data transmission. The UE-B may transmit data to the UE-A via the resources indicated by the assistance information.

There is of course another possibility that UE-a and UE-B are located within the coverage of the gNB, where the gNB may send assistance information to either UE-a or UE-B, the assistance information indicating the resources of the data transmission. The UE-a or UE-B may perform data transmission in the resources indicated by the assistance information.

In order to clearly describe the methods provided by the embodiments of the present application, the following detailed description is made in connection with specific embodiments.

Embodiment one:

referring to fig. 4, a flow chart of a message transmission method provided in an embodiment of the present application is shown.

The application scenarios of the first user equipment and the second user equipment in the embodiments of the present application are not limited, for example, when the method provided in the present application is applied to V2V, the first user equipment and the second user equipment may be vehicle-mounted devices, and may be specifically shown in fig. 5. In fig. 5, the flow shown in fig. 4 may be executed between the first user device and the second user device, which are the vehicle-mounted devices, respectively. Referring to fig. 4, the method includes:

step 401: and establishing direct link connection between the first user equipment and the second user equipment.

Step 402: the second user equipment sends a first message to the first user equipment, wherein the first message comprises the position information of the second user equipment.

Step 403: the first user equipment receives a first message from the second user equipment and sends auxiliary information to the second user equipment according to the position information.

The auxiliary information is used for indicating resources, and the resources indicated by the auxiliary information can be used for data transmission from the second user equipment to the first user equipment.

In step 401, how the first ue specifically establishes a direct link connection with the second ue, which is not limited in the embodiment of the present application.

It should be noted that, the direct link connection refers to a communication connection established between two devices in the cellular network through a direct link interface, and data between two devices establishing the direct link connection does not need to be forwarded through a base station in the cellular network, so that direct communication can be performed.

In step 402, after the direct link connection is established between the first user equipment and the second user equipment, the second user equipment may send a first message.

The specific type and role of the first message is not limited by the embodiments of the present application. For example, the first message may be a trigger message, where the trigger message is used to instruct the second device to feed back the auxiliary information. The trigger message may be a physical layer message, may be sent by the second user equipment via direct link control information (Sidelink Control Information, SCI) of the physical layer, and the corresponding location information may be carried via the SCI.

For another example, the first message may also be a configuration message, which is used to configure a resource for periodically feeding back the auxiliary information, that is, the second user equipment configures, for the first user equipment, a periodic resource through the configuration message, where the resource is used when the first user equipment feeds back the auxiliary information. For example, the periodic resource may be a transmission opportunity every 100ms or several seconds, and the frequency domain resource transmitted may be a fixed frequency domain resource. The configuration message may be a radio resource control (radio resource control, RRC) layer or medium access control (medium access control, MAC) layer message, which may be sent by the second user equipment through RRC signaling or MAC signaling.

In the embodiment of the present application, the implementation manner of the location information is not limited. For example, the location information may be a zone identity (zone identity). Wherein a region label corresponds to at least one region. For example, as shown in fig. 6, a schematic diagram of a region label is provided in an embodiment of the present application. In fig. 6, the division of 32 areas is taken as an example, and in practical application, the division of 32 areas may be also performed. In fig. 6, each region does not overlap with each other. The specific size of each area may be determined according to practical situations, and the embodiment of the application is not limited, for example, each area may be a square area with a side length of 100 to 200 meters.

To indicate each region, each region may be assigned a region label. It should be noted that, in order to reduce the resource consumption required for transmitting the area label, there is a maximum value, for example, a maximum value of 16, and then a smaller number of bits is required to indicate the area label. Since the number of divided regions may be greater than the number of region labels, for this purpose, one region label may be repeatedly allocated to a plurality of regions, i.e., different regions may correspond to the same region label. For example, in fig. 6, each region label corresponds to 2 regions.

In connection with the above description, when the location information is the area reference number, the location information transmitted by the second user equipment is the area reference number of the area where the second user equipment is located. For example, assuming that the second user equipment is located in the area corresponding to the area reference number 5 in fig. 6, the location information transmitted by the second user equipment may be the area reference number 5.

It should be noted that, how the second device determines the area label of the area where the second device is located specifically is not limited in the embodiment of the present application. For example, the correspondence between the area and the area label may be preconfigured, for example, the correspondence between the area and the area label may not be configured by the network device to the second user device, may be configured by the first user device, or may be autonomously configured by the second user device. The second user equipment can determine the area where the second user equipment is located according to the longitude and latitude coordinate information of the second user equipment, so as to determine the area label corresponding to the area.

Of course, the above is merely an example, and the location information may be information other than the area reference number, for example, longitude and latitude coordinate information, or global positioning system (Global Positioning System, GPS) coordinate information, or satellite positioning coordinate information such as beidou satellite navigation system coordinate information, which is not limited in the embodiment of the present application.

Optionally, in the embodiment of the present application, after the first user equipment receives the first message, after a preset period of time or after the first user equipment moves beyond a preset distance, the first user equipment may consider that the location information in the first message is invalid, and at this time, the location information in the first message may be ignored, and the location information is no longer used. It should be noted that, the first user equipment may determine a real-time movement track of the first user equipment according to its own location information, so as to determine a real-time movement distance of the first user equipment.

Optionally, the first message may further carry at least one of a first distance threshold value and a first received signal strength threshold value. The function of the first distance threshold and the first received signal strength threshold will be described later, and will not be described here again. The first distance threshold may also be referred to as no-assumability distance (no-assumability-information range) or a distance threshold, among others. The corresponding first received signal strength threshold value may also be referred to as a received signal strength threshold or the like.

Whether the first message carries the first distance threshold value and the first received signal strength threshold value or not can be configured by the network device to the second user device through a higher layer signaling before the second user device sends the first message, and the higher layer signaling can be signaling such as radio resource control (radio resource control, RRC) signaling and the like. For example, the network device sends high-layer signaling to the second user device, and instructs the second user device to carry the first distance threshold value in the first message, so that the first user device may carry the first distance threshold value in the first message; the higher layer signaling indicates that the second ue carries the first received signal strength threshold in the first message, and the first ue may carry the first received signal strength threshold in the first message.

Optionally, the higher layer signaling may further indicate whether the location information is carried in the first message, and when the second user equipment determines that the higher layer signaling indicates that the location information is carried in the first message, the second user equipment carries the location information in the first message.

It should be noted that, the first distance threshold may be determined by the second ue itself or may be configured by higher layer signaling. Or the network device may configure a value range of the first distance threshold through the higher layer signaling, and the second user device may select a value in the value range of the first distance threshold as the first distance threshold, and carry the value in the control signaling in the first message. If the first distance threshold value or the value range of the first distance threshold value is preconfigured, the first distance threshold value or the value range of the first distance threshold value may be updated through a high-layer signaling, or may not be updated, which is not limited in the embodiment of the present application.

In step 403, the first user device may calculate a distance between the second user device and the first user device according to the location information of the second user device and the location information of the first user device.

For example, as shown in fig. 7, a schematic diagram of region division is provided in the embodiment of the present application. In fig. 7, the division of 16 areas is described as an example. Assuming zone number 5 of the first user device, the distance from the second user device when the second user device is in a different zone may be as shown in table 2.

TABLE 2

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Table 2 shows the calculated distances to the second user equipment when the first user equipment is in different areas.

It should be noted that, in the embodiment of the present application, the distance calculated according to the area label is an estimated value, and there is a certain error range with the actual distance, but this error range does not affect the method provided in the embodiment of the present application. For example, the area where the second user device is located is denoted by the reference numeral 5, and the calculated distance is 0, where the calculated distance 0 does not represent that the first user device is located at the same location as the second user device, but only represents that the first user device is located at the same area as the second user device.

As another example, embodiments of the present application also provide another way to determine distance. Specifically, the first user equipment determines at least one first distance between the first user equipment and the second user equipment according to the received position information of the second user equipment, the first user equipment determines a second distance between the first user equipment and the second user equipment according to the received signal strength of the signal of the second user equipment, and the first user equipment determines the distance between the first user equipment and the second user equipment according to the at least one first distance and the second distance.

For example, the first user equipment determines at least one first distance according to the location information as follows: 50m and 100m; the second distance is determined to be 60m according to the signal intensity, and the distance between the first distance and the second distance can be determined when the difference between the first distance and the second distance is the smallest, namely 50 m.

How to determine whether to transmit the auxiliary information is described below, respectively.

In a first possible implementation, it is determined whether to transmit the auxiliary information only according to the distance between the first user equipment and the second user equipment.

In combination with the foregoing description, the first user equipment may send the auxiliary information to the second user equipment when a distance between the first user equipment and the second user equipment is greater than or equal to a first distance threshold value. Correspondingly, when the distance is smaller than a first distance threshold value, the first user equipment may not send the auxiliary information to the second user equipment.

For example, in combination with the foregoing table 2, when the first distance threshold is 25 meters, the area label of the area where the second user equipment is located is 5, and when the area label of the area where the first user equipment is located is 1 or 4 or 6 or 9, the distance between the first user equipment and the second user equipment is less than 25 meters, and the first user equipment does not need to feed back auxiliary information to the second user equipment. When the area number of the area where the first user equipment is located is any one of 0, 2, 3, 7, 8, 10, 11, 12, 13, 14 and 15, the distance between the first user equipment and the second user equipment is greater than 25 meters, and the first user equipment needs to feed back auxiliary information to the second user equipment.

It should be noted that, since one region identifier may correspond to a plurality of regions, the first ue may determine a possible value of the distance between two ues according to the plurality of regions corresponding to the region identifier of the second ue. For example, the first user equipment determines at least one distance according to the area number of the second user equipment as follows: 50m and 100m. For example, in connection with fig. 6, if the area where the first user equipment is located is an area corresponding to the first row and the first column, the first user equipment obtains that the location information of the second user equipment is the area reference number 5, and in connection with fig. 6, the first user equipment may determine that the area reference number 5 corresponds to two areas. The first user equipment may take the area of the second row and the second column as an area where the second user equipment may be located, and calculate the distance.

In the above implementation manner, when the distance is smaller than or equal to the first distance threshold value, the attenuation of the signal between the first user equipment and the second user equipment is smaller, and the probability that the data sent by the second user equipment is successfully received by the first user equipment is larger, so that the first user equipment can recommend the resource for data transmission to the second user equipment without using the auxiliary information, thereby reducing the frequency of feeding back the auxiliary information, reducing the system load and improving the resource utilization rate.

Because the region labels correspond to a plurality of regions, a turnover problem of the position information may occur, so that the determined distance between the first user equipment and the second user equipment may be inaccurate. For example, in conjunction with the foregoing fig. 6, the area where the first ue is located is denoted by the area reference numeral 5, and the acquired location information of the second ue is denoted by the area reference numeral 9. For the first user device, the distinguishing reference 9 may correspond to the area of the third column of the second row, or may correspond to the area of the seventh column of the second row. By comparing the difference in distance between the two areas and the area where the first user equipment is located, respectively, it can be found that the two distances differ by a factor of approximately 5.

For this purpose, in a second possible implementation manner, the application may further perform auxiliary determination in combination with the signal strength of the signal received by the first user equipment, so as to determine whether to send auxiliary information.

Specifically, the signal strength is the signal strength of the signal of the first user equipment received by the second user equipment.

For example, the first user equipment may measure the first message to obtain an RSSI or an RSRP of the first message, and the first user equipment determines the RSSI or the RSRP of the first message as the signal strength.

Specifically, the RSSI is determined as the signal strength, or the RSRP is determined as the signal strength, which may be indicated by the network device through a higher layer signaling, or may be preconfigured, which is not limited in the embodiment of the present application.

As another example, the first user equipment may measure each message from the second user equipment to obtain the RSSI or RSRP of each message. The first user equipment may determine a measured RSSI average or RSRP average of the at least one message as the signal strength.

The above is merely an example, and other methods of determining signal strength may exist and are not illustrated herein.

In connection with the foregoing description, the first user equipment may determine whether to transmit the assistance information by:

and when the distance between the first user equipment and the second user equipment is greater than or equal to a first distance threshold value, the first user equipment sends the auxiliary information to the second user equipment. In this scenario, the signal strength may no longer be considered, i.e. no matter whether the signal strength is greater than the first received signal strength threshold value, the auxiliary information may be sent as long as the distance between the first user equipment and the second user equipment is greater than or equal to the first distance threshold value.

And when the distance between the first user equipment and the second user equipment is smaller than the first distance threshold value and the signal strength is smaller than the first receiving signal strength threshold value, the first user equipment sends the auxiliary information to the second user equipment.

And when the distance between the first user equipment and the second user equipment is smaller than the first distance threshold value and the signal strength is larger than or equal to the first receiving signal strength threshold value, the first user equipment does not send the auxiliary information to the second user equipment.

The specific values of the first distance threshold and the first received signal strength threshold may be determined according to practical situations, for example, the first distance threshold may be 20 meters, and the first received signal strength threshold may be set to-80 dBm. And when the first user equipment determines that the distance between the first user equipment and the second user equipment is 30 meters, auxiliary information is sent to the second user equipment. When the first user equipment determines that the distance from the second user equipment is 10 meters, if the signal strength is-90 dBm, auxiliary information is sent to the second user equipment. When the first user equipment determines that the distance from the second user equipment is 10 meters, if the signal strength is-70 dBm, no auxiliary information is transmitted to the second user equipment.

In the above implementation manner, since there is a correlation between the signal strength and the distance, the accuracy of determining whether to feedback the auxiliary information can be further improved by determining whether to feedback the auxiliary information through two parameters of the signal strength and the distance.

It should be noted that the first distance threshold and the first received signal strength threshold may be configured by the second user equipment, for example, by the first message. The first distance threshold and the first received signal strength threshold may also be determined by the first user equipment autonomously, and the first distance threshold and the first received signal strength threshold may also be configured by the network equipment through high layer signaling, which is not limited in the embodiment of the present application.

In addition, whether to use signal strength to assist in determining whether to send auxiliary information may also be indicated by the network device through higher layer signaling.

In a third possible implementation manner, the present application may also determine whether to send the auxiliary information only according to the signal strength.

Specifically, when the signal strength is smaller than a first received signal strength threshold value, the first user equipment sends the auxiliary information to the second user equipment.

And when the signal strength is greater than or equal to a first received signal strength threshold value, the first user equipment does not send the auxiliary information to the second user equipment.

For example, the first received signal strength threshold may be set to-80 dBm. The signal strength is the RSRP obtained by measuring the first message. When the RSRP is-90 dBm, the first user equipment transmits auxiliary information to the second user equipment. When the RSRP is-70 dBm, the first user equipment does not send auxiliary information to the second user equipment.

The first user equipment determines whether to transmit the auxiliary information according to the location information as described above. When the first user equipment sends the auxiliary information, the resource for data transmission can be indicated to the second user equipment through the auxiliary information, and the second user equipment can determine whether to use the resource indicated by the auxiliary information for data transmission according to actual conditions. The resources indicated by the auxiliary information may be resources with smaller interference or resources with better channel quality.

It should be noted that, how the first ue specifically indicates the resource through the auxiliary information, and the embodiment of the present application is not limited.

For example, the auxiliary information may include a resource identifier of the resource to be indicated, and the second user equipment may determine the resource indicated by the auxiliary information according to the resource identifier.

For another example, the auxiliary information may include a cyclic shift sequence, which may be generated based on physical uplink control channel (physical uplink control channel, PUCCH) format 0. The sequence identifier of the cyclic shift sequence in the auxiliary information may have a corresponding relationship with the resource identifier indicated by the auxiliary information, and the second user equipment may determine the resource indicated by the auxiliary information according to the sequence identifier and the corresponding relationship between the sequence identifier and the resource identifier.

For another example, the auxiliary information may be sent through a first resource, the resource indicated by the auxiliary information is a second resource, and a correspondence may exist between the first resource and the second resource. The second user equipment may determine the resource indicated by the auxiliary information according to the first resource and the corresponding relationship between the first resource and the second resource.

The above is merely an example, and resources may be indicated by other means and are not illustrated here one by one.

In this embodiment of the present application, before the first user equipment performs data transmission, the first user equipment may further send a second message to the third user equipment, where the second message is used to instruct the third user equipment to feed back auxiliary information. The first user equipment can then transmit data to the third user equipment through the resources indicated by the auxiliary information fed back by the third user equipment.

Embodiment two:

in the foregoing embodiment, it is described that the first ue may indicate the resource to the second ue, and the second ue may perform data transmission through the resource indicated by the first ue, so that the success rate of data transmission may be improved. Further, when a plurality of user equipments indicate resources to one user equipment, how to determine the resources for transmitting data from the plurality of resources by the user equipment is a problem to be solved. For this reason, embodiments of the present application will provide a method to solve the above-mentioned problems, and will be described in detail below.

Referring to fig. 8, a flow chart of a message transmission method according to an embodiment of the present application is provided.

The application scenario of the method shown in fig. 8 is not limited, for example, when the method provided in the present application is applied to V2V, both the first user equipment and the N second user equipment may be vehicle-mounted devices, which may be specifically shown in fig. 9. In fig. 9, a first ue and N second ues may belong to a multicast group, where the multicast group may further include other second ues, and the first ue may receive auxiliary information from the plurality of second ues. Referring to fig. 9, as shown in fig. 8, the method includes:

step 801: the first user equipment receives N pieces of auxiliary information.

The N pieces of auxiliary information come from N pieces of second user equipment, and one piece of auxiliary information can be sent by one piece of second user equipment in the N pieces of second user equipment; the N pieces of auxiliary information are used for indicating at least one resource, one piece of auxiliary information in the N pieces of auxiliary information is used for indicating one or more resources, the N pieces of auxiliary information comprise the position information of the N pieces of second user equipment, one piece of auxiliary information in the N pieces of auxiliary information comprises the position information of the one piece of second user equipment, and N is an integer greater than 0.

It should be noted that, before receiving the auxiliary information, the first ue may establish direct link connection with N second ues.

The first ue and the N second ues may be located in the same multicast group, where the multicast group may include M second ues, where M is an integer greater than or equal to N. And part of second user equipment in the multicast group, namely the N pieces of second user equipment, send auxiliary information to the first user equipment, and other second user equipment can not send the auxiliary information. For example, after the first ue sends the trigger message to all the second ues in the multicast group, there may be some second ues that do not accurately receive the trigger message, so that the auxiliary information may not be sent.

In the second embodiment, the implementation manner of the location information may be the same as that of the first embodiment, for example, the location information may be an area label or satellite positioning coordinate information, and the description in the first embodiment may be referred to specifically, and will not be repeated here.

Step 802: and the first user equipment determines resources for carrying out data transmission according to N pieces of position information corresponding to the N pieces of auxiliary information.

Specifically, the first user equipment may determine N distances according to N pieces of location information corresponding to the N pieces of auxiliary information, and determine a resource for performing data transmission from the at least one resource according to the N distances.

The first user equipment may determine a distance according to each position information in the N pieces of auxiliary information, where one distance in the N distances is a distance between the first user equipment and one second user equipment in the N pieces of second user equipment.

It should be noted that, the first ue may determine its own position, and after acquiring N pieces of position information, the distance between the second ue corresponding to each piece of position information in the N pieces of position information may be determined, and specific reference may be made to the description in the foregoing embodiments, which is not repeated herein.

In this embodiment of the present application, how the first user equipment determines the resources for performing data transmission specifically, there are multiple implementation manners, and the description is described below respectively.

The implementation mode is as follows:

the first user equipment may determine at least one candidate resource from the at least one resource according to the N distances, and then determine one candidate resource from the at least one candidate resource as a resource for data transmission.

The first user equipment determines that there are a plurality of situations for the at least one candidate resource, as described below.

In case one, at least one candidate resource is determined from the N distances according to the size of the distances.

For example, the first user equipment may determine, as the candidate resource, the resource indicated by the auxiliary information corresponding to the distance greater than or equal to the second distance threshold value from among the N distances. Correspondingly, the resources indicated by the auxiliary information corresponding to the distances smaller than the second distance threshold value in the N distances are not determined to be candidate resources.

For example, n=4, 4 second user equipments are UE-B1, UE-B2, UE-B3 and UE-B4, respectively. The first user device is at a distance 28, 44, 56 and 20 from the 4 second user devices, respectively. The second distance threshold value is 30, and the first user equipment can take resources indicated by the auxiliary information sent by the UE-B2 and the UE-B3 as candidate resources.

The auxiliary information corresponding to the distance may be auxiliary information for determining the distance. Since the position information is included in the auxiliary information, the distance is determined according to the position information in the auxiliary information, and thus, for convenience of description, the auxiliary information for determining one distance is referred to as auxiliary information corresponding to the distance.

It should be noted that the second distance threshold value may be configured by the second user equipment. The second distance threshold may also be determined by the first user equipment autonomously, and the second distance threshold may also be configured by the network equipment through higher layer signaling, which is not limited in the embodiment of the present application. Alternatively, the first user device may select a value within a range of distance values, which may be configured by the network device through higher layer signaling or predefined by the standard, as the second distance threshold value.

In the first case, how the first ue determines the resources for performing data transmission specifically, the embodiment of the present application is not limited. For example, the first user equipment may use, as the resource for performing data transmission, the candidate resource with the largest corresponding distance from among the at least one candidate resource. Alternatively, the first ue may further randomly select one candidate resource from the at least one candidate resource as a resource for data transmission.

In the second case, in order to avoid the aforementioned problem of location information turnover, at least one candidate resource may be determined from the N distances according to the size of the distances and the size of the signal strength.

Specifically, for any one distance of the N distances, when the distance is greater than or equal to a second distance threshold value, the first user equipment determines a resource indicated by auxiliary information corresponding to the distance as a candidate resource.

And for any one of the N distances, when the distance is smaller than a second distance threshold value and the signal strength of the auxiliary information corresponding to the received distance is smaller than a second receiving signal strength threshold value, the first user equipment determines the resource indicated by the auxiliary information corresponding to the distance as a candidate resource.

And aiming at any distance of the N distances, when the distance is smaller than the second distance threshold value and the signal strength of the auxiliary information corresponding to the received distance is larger than or equal to the second receiving signal strength threshold value, the first user equipment does not serve as a candidate resource for the resource indicated by the auxiliary information corresponding to the distance.

The signal strength here may be RSRP or RSSI obtained by the first user equipment measuring the auxiliary information. The second received signal strength threshold value may be configured by the second user equipment. The second received signal strength threshold may also be determined by the first user equipment autonomously, and the second received signal strength threshold may also be configured by the network equipment through higher layer signaling, which is not limited in the embodiment of the present application. Alternatively, the first user equipment may select a value within a signal strength range as the second received signal strength threshold, which may be configured by the network equipment through higher layer signaling or predefined by the standard.

In the second case, the first ue may use, as the resource for performing data transmission, the candidate resource with the minimum signal strength of the corresponding auxiliary information from among the at least one candidate resource. Or the first user equipment may use the candidate resource with the largest distance as the resource for data transmission in the at least one candidate resource. Alternatively, the first ue may further randomly select one candidate resource from the at least one candidate resource as a resource for data transmission. The above is merely an example, and other situations may exist and are not described in detail herein.

The implementation mode II is as follows:

the first ue may determine, as a resource for performing data transmission, a resource indicated by the auxiliary information corresponding to the largest distance among the N distances.

For example, n=3, 3 second user equipments are UE-B1, UE-B2 and UE-B3, respectively. The first user equipment UE-a is at a distance 28, 44 and 20 from the 3 second user equipments, respectively. The maximum distance is 44, and the first UE may use the resource indicated by the auxiliary information sent by the UE-B2 as a resource for performing data transmission.

Embodiment III:

the first user equipment may determine a weight of each of the at least one resource according to the N distances. The size of the distance and the size of the weight may be positively correlated, for example, the smaller the distance is, the smaller the weight of the resource indicated by the auxiliary information corresponding to the distance is; the larger the distance is, the larger the weight of the resource indicated by the auxiliary information corresponding to the distance is.

For example, the distance and weight may satisfy the following relationship:

Q＝βX+α······(1)

wherein Q is a weight, X is a distance, beta is a coefficient greater than 0, and alpha is a preset value.

The formula (1) is merely an example, and the distance and the weight may satisfy other relationships, which are not described herein.

After determining the weight of each resource in at least one resource, the first user equipment may select one resource from K resources with the largest weight as a resource for performing data transmission, where K is an integer greater than 0. For example, the first user equipment may determine a resource with the greatest weight among the at least one resource as a resource for data transmission.

It should be noted that if one auxiliary information indicates a plurality of resources, the weights of the plurality of resources indicated by the auxiliary information are the same.

For example, there are three second user equipments, UE-B1, UE-B2 and UE-B3, respectively. The first user equipment is 20 meters from UE-B1, 30 meters from UE-B2 and 40 meters from UE-B3. Assume that the determined weights are 2, 3, and 4, respectively. The first UE may determine the resource indicated by the auxiliary information corresponding to the distance with the largest weight as the resource for performing data transmission, that is, determine the resource indicated by the auxiliary information sent by the UE-B3 as the resource for performing data transmission. Alternatively, the first UE may further determine a distance from the distances with weights greater than 2, and determine a resource indicated by the auxiliary information corresponding to the distance as a resource for performing data transmission, for example, determine a resource indicated by the auxiliary information sent by the UE-B2 as a resource for performing data transmission.

Embodiment four:

and the first user equipment determines the weight of each resource in at least one resource according to the N distances and the signal strength of each auxiliary information in the N auxiliary information. It should be noted that if resources of the same weight exist, one resource may be randomly determined as a resource for data transmission from among the resources of the same weight.

For example, in one mode, the weight of each resource is a sum of a first weight corresponding to the distance and a second weight corresponding to the signal strength. The magnitude of the distance and the magnitude of the first weight may be positively correlated, e.g., the smaller the distance, the smaller the corresponding first weight of the distance; the greater the distance, the greater the first weight corresponding to the distance. The magnitude of the signal strength and the magnitude of the first weight may be inversely related, e.g., the smaller the signal strength, the greater the corresponding second weight of the signal strength; the greater the signal strength, the less the corresponding second weight of the signal strength.

For example, the weight of each resource may satisfy the following relationship:

Q＝βX+γY······(2)

wherein Q is a weight, βX is equal to a first weight, and γY is equal to a second weight; x is distance, Y is signal intensity, beta is a coefficient greater than 0, and gamma is a coefficient less than 0.

The formula (2) is merely an example, and the distance and the weight may satisfy other relationships, which are not described herein.

In connection with the above formula, there are for example three second user equipments, UE-B1, UE-B2 and UE-B3, respectively. The first user equipment is 20 m away from UE-B1, the signal strength is-90 dBm, the distance from UE-B2 is 30 m, the signal strength is-80 dBm, the distance from UE-B3 is 40 m, and the signal strength is-100 dBm. Beta is equal to 0.1 and gamma is equal to-0.1. At this time, it may be determined according to formula (2) that the weight of the resource indicated by the auxiliary information transmitted by UE-B1 is 11, the weight of the resource indicated by the auxiliary information transmitted by UE-B2 is 11, and the weight of the resource indicated by the auxiliary information transmitted by UE-B3 is 14.

For another example, in the second mode, the weight may be determined according to the distance and the ordering of the signal strength corresponding to each resource. For example, the weight of each resource may satisfy the following relationship:

Q＝Q1+Q2······(3)

q is a weight, and Q1 is a sorting value obtained by sorting the distances corresponding to the resource from small to large in N distances; q2 is the sorting value of the signal intensity corresponding to the resource after sorting from big to small in N signal intensities.

In connection with the above formula, there are for example three second user equipments, UE-B1, UE-B2 and UE-B3, respectively. The first user equipment is 20 m away from UE-B1, the signal strength is-90 dBm, the distance from UE-B2 is 30 m, the signal strength is-80 dBm, the distance from UE-B3 is 40 m, and the signal strength is-100 dBm. At this time, the distance rank corresponding to the UE-B1 is 1, the signal strength rank is 2, the distance rank corresponding to the UE-B2 is 2, the signal strength rank is 1, the distance rank corresponding to the UE-B3 is 3, and the signal strength rank is 3. According to the formula (3), it may be determined that the weight of the resource indicated by the auxiliary information transmitted by the UE-B1 is 3=1+2, the weight of the resource indicated by the auxiliary information transmitted by the UE-B2 is 3=2+1, and the weight of the resource indicated by the auxiliary information transmitted by the UE-B3 is 4=2+2.

In a fourth implementation manner, the first user equipment may determine a resource with the largest weight in the at least one resource as a resource for performing data transmission.

It should be noted that if resources of the same weight exist, one resource may be randomly determined as a resource for data transmission from among the resources of the same weight.

For example, in combination with the foregoing example, when the weights determined according to the formula (2) are 11, and 14, respectively, the resource corresponding to the weight 14 may be determined as the resource for data transmission.

For another example, in combination with the foregoing example, when the weights determined according to the formula (3) are 3, and 4, respectively, the resource corresponding to the weight 4 may be determined as the resource for data transmission.

Or the first user equipment selects one resource from K resources with the largest weight as the resource for carrying out data transmission, wherein K is an integer less than or equal to N.

For example, when there are 4 resources and the weight determined by the first ue is 10, 9, 11 and 14, the K takes a value of 2, and the first ue may determine any one of the two resources with weights of 11 and 14 as the resource for data transmission.

In the second embodiment, how to indicate the resource through the auxiliary information is not limited, and the description in the first embodiment or the prior art may be referred to specifically, and will not be repeated here.

Embodiment III:

the application also provides a method which can be applied to a unicast scene of V2V and is used for avoiding the problem of frequently sending auxiliary information. As shown in fig. 10, the method includes:

step 1001: the first user equipment receives the auxiliary information from the second user equipment.

The auxiliary information comprises position information of the second user equipment, and the auxiliary information is used for indicating resources.

The implementation of the location information may refer to the foregoing description, and will not be described herein. How the auxiliary information indicates the resource may also refer to the description in embodiment one or the prior art, and will not be described herein.

Step 1002: and the first user equipment determines effective time according to the position information.

The effective time is the effective time of the auxiliary information, or the effective time is the time when the first user equipment determines that the second user equipment is triggered to send the auxiliary information next time.

In this embodiment of the present application, the first user equipment may determine the distance between the first user equipment and the second user equipment according to the location information of the second user equipment, and specific reference may be made to the description in the foregoing embodiment, which is not repeated herein.

The distance determined by the first user equipment and the effective time can meet a preset constraint relation, and the first user equipment can determine the effective time according to the distance.

For example, the preset constraint relationship satisfies the following formula:

time(s)＝P/d(m)······(4)

wherein time(s) represents the effective time in seconds(s), d (m) represents the distance calculated by the first user equipment, P is a preset value, and P may be a number greater than 1, for example, p=1000. As can be seen from the formula (4), the farther the calculated distance is, the more the change factor in the path between the first user equipment and the second user equipment is, and the shorter the effective time is.

For another example, the preset constraint relationship satisfies the following formula:

time(s)＝max(P/d(m),1s)······(5)

wherein time(s) represents the effective time in seconds(s), d (m) represents the distance calculated by the first user equipment, P is a preset value, and P may be a number greater than 1, for example, p=1000. max () is a maximum value taking operation. The difference from equation (4) is that the lower limit of the effective time is defined as 1 second in equation (5). Of course, the lower limit of the effective time can also be other values, and can be specifically determined according to practical situations.

As another example, the preset constraint relationship may also satisfy the following formula:

time(s)＝max(lower_bound，(d_max-d(m))/v)······(6)

where time(s) represents the effective time in seconds(s), d (m) represents the distance calculated by the first ue, v is the speed of the first ue, a nominal value or maximum speed may be adopted, and lower_bound represents the lower limit value of the effective time, which is a preconfigured value, for example, may be equal to 1.d_max is the boundary distance of the areas, for example, when the position information is the area label, each area is a square area, and d_max represents the side length of the square area, for example, equal to 100.

As described above, there may be two meanings of the valid time, when the valid time is the valid time of the auxiliary information, it indicates that the auxiliary information received by the first user equipment is valid in the valid time, and the first user equipment does not send a trigger message to the second user equipment in the valid time from the starting time of receiving the auxiliary information, where the trigger message is used to instruct the second user equipment to feed back new auxiliary information. After the validity time, the first user equipment may send a trigger message to the second user equipment, thereby triggering the second user equipment to send new auxiliary information.

For example, the effective time is 5 seconds, the time for the first ue to receive the auxiliary information is 19:00, and at 19: within 5 seconds after 00, not sending a trigger message to the second user equipment; after 19:05, the first user equipment may determine whether to send a trigger message to the second user equipment according to the actual situation.

When the valid time is the time when the first user equipment determines to trigger the second user equipment to send the auxiliary information next time, the valid time is indicated to be the interval between the starting time when the first user equipment receives the auxiliary information and the time when the second user equipment sends the trigger information.

For example, the effective time is 5 seconds, the time when the first user equipment receives the auxiliary information is 19:00, and when the time is equal to or greater than 19:05, the first user equipment sends a trigger message to the second user equipment.

In this scenario, the first user equipment may also send the valid time to the second user equipment. The second user equipment may thereby determine the time to send feedback information to the first user equipment based on the validity time.

For example, the second user equipment is configured to send feedback information to the first user equipment according to a period T. When the first user equipment determines the effective time, the second user equipment can be instructed to send feedback information according to the effective time by sending the effective time, so that auxiliary information is not sent according to the period T in the current period. For example, the period T is 10 seconds and the effective time is 15 seconds. The time when the first ue receives the auxiliary information is 19:00, and if the second ue should send feedback information again at 19:10 according to period T. Since the effective time for the second ue to receive the first ue transmission is 15 seconds, feedback information may be sent at 19:15.

By the method, the second user equipment carries the position information in the transmitted auxiliary information, so that the first user equipment determines the time for triggering the second user equipment to transmit the auxiliary information next time according to the position information, frequent auxiliary information transmission of the second user equipment is avoided, and the resource utilization rate is improved.

It should be noted that, each embodiment provided in the present application may exist independently or may be combined according to internal logic, and these solutions fall within the protection scope of the present application.

The foregoing process is described below by way of specific examples.

Embodiment four:

in a fourth embodiment, UE-a may be the first user equipment in the first embodiment, and UE-B may be the second user equipment in the first embodiment, as shown in fig. 11, and the method includes:

and the UE-B carries the position information when sending the triggering message of the auxiliary information, and after receiving the position information, the UE-A calculates the distance, and if the distance is larger than a distance threshold, the UE-A feeds back the auxiliary information. Alternatively, the RSRP value may be considered for assistance in calculating the distance between the two. The trigger message of the auxiliary information may refer to the first message in the first embodiment.

Step 1: the UE-B carries position information in a trigger message or a configuration message;

In the trigger message, the location information may be a region label or location information more detailed than the region label, such as GPS or the like, which may be carried in the 2nd SCI; in addition to the location information, optionally, the trigger message sent by the UE-B may additionally carry a "no auxiliary information distance" no-assistance-information range, i.e. be used for the UE-a to determine, if the distance between the two is smaller than the no auxiliary information distance, no auxiliary information is fed back, and if the distance between the two is greater than or equal to the no auxiliary information distance, auxiliary information is fed back.

Specifically, whether the location information and/or the "no auxiliary information distance" are carried or not may be configured by the higher layer signaling, and a specific value of the "no auxiliary information distance" may be configured by the higher layer signaling, or a range of the "no auxiliary information distance" may be configured by the higher layer signaling, and an indication of the specific value is carried by the control signaling in the trigger message; another possibility is that a specific value or range of "no auxiliary information distance" is preconfigured and subsequently does not need to be changed.

In the configuration message, the carrying of the location information references the design in the trigger message. Unlike triggering messages that only feed back auxiliary information once, configuration messages may configure a periodic feedback resource. Therefore, after the configuration message carries the position information and is sent to the UE-a, the UE-a can determine whether the current auxiliary information is fed back according to the position information in the configuration message, and consider that the position information is invalid after a certain time or a certain position is moved, so as to continue feeding back the auxiliary information. Optionally, the UE-B continues to carry location information in subsequent communications or trigger messages, helping the UE-a to continuously determine the distance between the two.

Similarly, whether the configuration message carries position information and/or the "no auxiliary information distance" can be configured by a higher layer, and a specific value of the "no auxiliary information distance" is configured by a higher layer signaling, or a range of the "no auxiliary information distance" is configured by a higher layer signaling, and an indication of the specific value is carried by a control signaling in the configuration message; another possibility is that a specific value or range of "no auxiliary information distance" is preconfigured and subsequently does not need to be changed. The no-side information distance may refer to a first distance threshold value in the first embodiment.

Step 2: and after receiving the trigger message and the position information of the UE-A, the UE-A calculates information such as the distance between the trigger message and the position information of the UE-B and determines whether auxiliary information is fed back or not. When the distance between the two is larger than or equal to the 'no auxiliary information distance', the UE-A transmits auxiliary information; otherwise, the UE-A does not transmit the assistance information.

For example, the UE-a knows its own location information, such as zone ID, receives the location information sent by the UE-B, obtains the distance between the two according to a table, and takes the zone ID of 4 bits as an example, and the location of the zone around the UE with zone ID of 5 and the profile (the profile can refer to fig. 7 in the first embodiment) can be seen in table 2 in the first embodiment.

For example, when the "no auxiliary information distance" is 25 meters, the UE-a does not need to perform auxiliary information feedback when the areas of the UE-B are numbered 1, 4, 6, 9, and needs to perform auxiliary information feedback when the areas are numbered other values.

The problem of folding is mentioned in the prior background art, and the application provides a problem of auxiliary judgment of whether the position information is folded or not by combining the strength of other received signals.

Since the number of bits of the position information is limited, a region having a larger distance uses the same region ID, such as the two regions 9 in fig. 6. On receipt of a message from the UE-B in the area 5 (area 5 of the second column), for example, the location information of the UE-B is acquired as area 9, i.e. there are various possibilities, one of which is possibly located in area 9 beside the area 5 (area 9 of the third column) and the other of which is possibly located in area 9 of the seventh column. By comparing the difference in distance between the two areas 9 and 5, it can be found that the two areas differ by approximately 5 times, so that the difference in magnitude of the received signal strength can be considered to assist in determining the true position of the UE-B.

Alternatively, a received signal strength threshold is set based on the "no auxiliary information distance", e.g., 20 meters of the "no auxiliary information distance", the received signal strength threshold is set to-80 dBm. The received signal strength may be a reference signal received power or a received signal strength indication. The received signal strength threshold may be configured by a higher layer or preconfigured. The UE-A receives a signal (trigger message or configuration message) sent by the UE-B, acquires a received signal strength value of the signal, acquires position information of the UE-B, calculates the position distance between the two signals, and records the position distance with the minimum value of possible distance.

If the distance is smaller than the 'no auxiliary information distance' and the received signal strength is larger than or equal to the received signal strength threshold value, the UE-A does not feed back auxiliary information; if the distance is smaller than the 'no auxiliary information distance' and the received signal strength is smaller than the received signal strength threshold value, the UE-A feeds back auxiliary information; if the distance is smaller than the 'no auxiliary information distance' and the received signal strength is larger than or equal to the received signal strength threshold value, the UE-A does not feed back auxiliary information; if the distance is greater than or equal to the 'no auxiliary information distance', the UE-A feeds back auxiliary information.

Returning to step 2, based on a separate example described above, an additional way of "determining" the distance between the two is provided. And setting a receiving signal strength threshold based on the 'no auxiliary information distance', wherein the receiving signal strength can be reference signal receiving power or receiving signal strength indication, and the receiving signal strength threshold can be configured by a high layer or preconfigured. The UE-A calculates the distance between the two according to the received position information of the UE-B, and if the received signal strength is greater than or equal to a received signal strength threshold value and the distance is smaller than the distance without auxiliary information, the UE-A considers that the distance between the two is smaller than the distance without auxiliary information and does not feed back auxiliary information; if the received signal strength is smaller than the received signal strength threshold value and the distance is smaller than the distance without auxiliary information, the UE-A considers that the distance between the two is larger than or equal to the distance without auxiliary information, and feeds back auxiliary information; if the distance is greater than or equal to the 'no auxiliary information distance', the UE-A considers that the distance is greater than or equal to the 'no auxiliary information distance', and the UE-A feeds back auxiliary information.

The threshold of the received signal strength may be configured or predefined by the higher layer signaling, or the higher layer signaling configures a range, and the UE-B message carries indication information to indicate a value in the range of the higher layer signaling configuration. In addition, whether or not to enable the received signal strength auxiliary distance determination may be configured by a higher layer.

The scheme provided by the application reduces unnecessary auxiliary information feedback by carrying the position information when the auxiliary information transmission is triggered.

Compared with the prior art, the embodiment of the application introduces two parameters of carrying the position information and the distance without the auxiliary information in the auxiliary information, so that the UE-A can judge whether to feed back the auxiliary information. In addition, aiming at the turnover problem of the position information, the creatively proposal adopts a mode of receiving a signal threshold to assist the judgment of the position information.

In summary, in the fourth embodiment, when the UE-B sends the configuration auxiliary information resource or triggers the auxiliary information transmission, the UE-B carries the location information of the UE-B, and the UE-a calculates the distance between the UE-B and the location information according to its own location information, and sends the auxiliary information when the distance is greater than a certain threshold, i.e. the "no auxiliary information distance" threshold.

In order to solve the problem of position information turnover, a receiving signal strength threshold is set based on the distance without auxiliary information, and the receiving signal strength threshold can be configured by a high layer or preconfigured. If the received signal strength is greater than or equal to the received signal strength threshold and the distance is smaller than the distance without auxiliary information, the UE-A does not feed back auxiliary information; if the received signal strength is smaller than the received signal strength threshold value and the distance is smaller than the distance without auxiliary information, the UE-A feeds back auxiliary information; if the distance is greater than or equal to the 'no auxiliary information distance', the UE-A feeds back auxiliary information; the folding device has the beneficial effects of solving the problem of folding the position information.

In addition, in the "no auxiliary information distance" of the fourth embodiment, the trigger message that can be sent by the UE-B may be additionally carried, whether the location information and/or the "no auxiliary information distance" are carried or not may be configured by the higher layer signaling, and the specific value of the "no auxiliary information distance" may be configured by the higher layer signaling, or the range of the "no auxiliary information distance" may be configured by the higher layer signaling, and the indication of the specific value is carried by the control signaling in the trigger message; another possibility is that a specific value or range of "no auxiliary information distance" is preconfigured and subsequently does not need to be changed.

Fifth embodiment of the present application:

an embodiment five is an implementation manner of the embodiment three, in the embodiment five, UE-a may be the second user equipment in the embodiment three, UE-B may be the first user equipment in the embodiment three, as shown in fig. 12, UE-a carries location information when sending auxiliary information, UE-B determines a distance between the UE-a and the second user equipment based on the location information of UE-a, and in a unicast scenario, the UE-a may be used to determine a valid time range of the auxiliary information or a time when the feedback of the auxiliary information is triggered next time, and in a multicast scenario, the UE-B may be used to perform multicast resource selection.

The unicast scenario is shown in fig. 13.

Step 1: the UE-A sends auxiliary information carrying position information to the UE-B, and the function is to assist the UE-B to determine the time for triggering the auxiliary information next time;

Step 2: and the UE-B calculates the distance between the two, determines the effective time of the auxiliary information according to the distance, does not trigger the feedback of the auxiliary information in the effective time, and can trigger the auxiliary information outside the effective time.

There are various methods of calculating the effective time, just to name a few:

time(s) =1000/d (m), where d (m) is the calculated distance between the two, meaning that the farther the distance, the more the variation factor in the path, the shorter the effective time;

time(s)＝max{1000/d(m),1s}；

the difference from the previous formula is that the lower limit of the effective time is defined to be 1 second;

time(s) =max (lower_bound, (d_max-d (m))/v); dmax is the boundary distance, v is the speed of the UE-B, and a nominal or maximum speed, lower bound, i.e., the lower limit of the active time, may also be used.

In the time(s) time range after the auxiliary information is once, the UE-B does not send the triggering message of the auxiliary information, and outside the time(s) time range, the UE-B sends the triggering message of the auxiliary information to update the auxiliary information.

Example six:

embodiment six is an implementation manner of embodiment two, in which UE-a may be the second user equipment in embodiment two, and UE-B may be the first user equipment in embodiment two, as shown in fig. 14:

Step 1: each UE-a sends auxiliary information carrying location information to UE-B. The purpose is for the UE-B to make resource selection.

Step 2: the UE-B acquires the position information of a plurality of UE-A, calculates the distance between the UE-B and each UE-A, and assists in the selection of multicast resources.

The UE-B knows the own position information, and after acquiring the position information of a plurality of UE-A, the distance between the UE-B and the UE-A1, the distance between the UE-B and the UE-A2 and the like are calculated respectively.

In one case, when the distance from the UE-A1 is greater than or equal to a distance threshold, the auxiliary information of the UE-A1 is used for selecting subsequent transmission resources; when the distance from the UE-A1 is smaller than the distance threshold, the auxiliary information of the UE-A is not used for selecting subsequent transmission resources; the distance threshold value may be predefined by a higher layer signaling configuration or standard, or a range may be predefined by a higher layer signaling configuration or standard, and specific values may be indicated by each UE-a;

in the current case, in order to avoid the problem of turning over the position information, the method may further classify the position information by combining with the received signal strength, and set a received signal strength threshold, where the received signal strength may be reference signal received power RSRP, or received signal strength indication RSSI, and the received signal strength threshold may be configured by a higher layer or preconfigured. If the received signal strength is greater than or equal to the received signal strength threshold and the distance is less than the distance threshold, the auxiliary information of the UE-A is not used for selecting the subsequent transmission resources; if the received signal strength is smaller than the received signal strength threshold value and the distance is smaller than the distance threshold, the auxiliary information of the UE-A is used for selecting the subsequent transmission resources; if the distance is greater than or equal to the distance threshold, the auxiliary information of the UE-a is used for selecting the subsequent transmission resources.

In another case, the UE-B allocates weights for resources in the auxiliary information of each UE-A according to the interval, the smaller the interval is, the smaller the weights are, and when multicast resources are determined, the UE-B selects resources used by multicast in one or more resources with the largest weights according to the superposition of the weights of each UE-A;

the location information turnover problem described in the background art, the UE-B may further select resources for multicast use according to the distance and the received signal strength value. One possible way is to perform weight selection based on the distance and the received signal strength value, or to perform weight selection based on one sequence number of the distance sorting and the received signal strength value sorting, which is just an example: the distance from UE-A1 is 20 meters, the strength is-90 dBm, the distance from UE-A2 is 30 meters, the strength is-80 dBm, the distance from UE-A3 is 40 meters, and the strength is-100 dBm. At this time, the distance rank of the UE-A1 is first, the intensity rank is second, the distance rank of the UE-A2 is second, the intensity rank is first, the distance rank of the UE-A3 is third, and the intensity rank is third, so the weight of the UE-A3 is maximum, the two ranks of the UE-A1 are the lowest value, namely the second, the two ranks of the UE-A2 are the lowest value, namely the second, and the weights of the UE-A1 and the UE-A2 are the same.

The scheme provided by the application assists the UE-B in judging the feedback time of the auxiliary information in unicast and assists the UE-B in carrying out resource selection in multicast by adding the position information when the auxiliary information is transmitted.

Compared with the prior art, the sixth embodiment feeds back the position information of the UE-a when feeding back the auxiliary information, so that the UE-B can further use in unicast and multicast.

Compared with the first embodiment, the sixth embodiment carries the position information when feeding back the auxiliary information, and the first embodiment carries the position information in the trigger message or the configuration message, which are different in direction. In effect, the triggering message or the configuration message carries the position information for reducing the feedback of the auxiliary information at the current time, and the auxiliary information carries the position information for determining the effective time of the auxiliary information during unicast or assisting the resource selection flow of multicast.

In summary, embodiment six:

In order to avoid the turnover problem, a receiving signal strength threshold is set, and if the receiving signal strength is greater than or equal to the receiving signal strength threshold and the distance is smaller than the distance threshold, the auxiliary information of the UE-A is not used for selecting the subsequent transmission resources; if the received signal strength is smaller than the received signal strength threshold value and the distance is smaller than the distance threshold, the auxiliary information of the UE-A is used for selecting the subsequent transmission resources; if the distance is greater than or equal to the distance threshold, the auxiliary information of the UE-a is used for selecting the subsequent transmission resources.

In another case, the UE-B allocates weights to the resources in the auxiliary information of each UE-a according to the interval, the smaller the interval is, the smaller the weights are, the weights are further used for determining multicast resources, and for the turnover problem, the UE-B can further determine the weights according to the interval and the received signal strength value.

The received signal strength threshold in the sixth embodiment may be configured by a higher layer or preconfigured.

Embodiment seven:

the embodiment of the application also provides a method for determining the distance, which can be applied to any of the previous embodiments. Specifically, the method comprises the following steps:

step one: the first user equipment receives a first message from the second user equipment;

The first message includes location information of the second ue, and the first message may refer to the description in the first embodiment, which is not described herein.

Step two: the first user equipment determines at least one first distance according to the position information of the second user equipment;

the at least one first distance is a candidate distance for a distance between a first user equipment and the second user equipment. As described above, when the position information is the area index, a plurality of distances may be determined from the area index, and each distance may be a candidate distance.

Step three: the first user equipment determines a second distance according to the received signal strength of the first message;

the signal strength and the distance have a certain association relation, so that the second distance can be determined according to the association relation. For example, the distance is 30 meters when the signal strength is-60 dBm, 50 meters when the signal strength is-80 dBm, and the second distance is 30 meters when the signal strength is-60 dBm.

Step four: the first user equipment determines the distance between the first user equipment and the second user equipment according to the at least one first distance and the second distance.

Specifically, the first user equipment determines a distance with the smallest difference value with the second distance in at least one first distance as a distance with the second user equipment.

For example, the first user equipment determines at least one first distance according to the location information as follows: 20m, 50m and 100m; the second distance is determined to be 60m according to the signal intensity, and the distance between the first distance and the second distance can be determined when the difference between the first distance and the second distance is the smallest, namely 50 m.

It should be noted that, the network architecture and the service scenario described in the embodiments of the present application are for more clearly describing the technical solution of the embodiments of the present application, and do not constitute a limitation on the technical solution provided in the embodiments of the present application, and those skilled in the art can know that, with the evolution of the network architecture and the appearance of the new service scenario, the technical solution provided in the embodiments of the present application is equally applicable to similar technical problems.

Based on the above, the embodiment of the application provides a user equipment, which has a function of realizing the behavior of the user equipment in any of the method embodiments. The functions may be implemented by hardware, or may be implemented by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to each of the above-described functions. Alternatively, the user equipment may be a terminal equipment.

The embodiment of the application also provides a communication system, which comprises the network equipment and the user equipment according to any one of the embodiments.

The present application further provides a computer readable storage medium, on which a computer program is stored, where the computer program is executed by a computer to implement a method flow related to a user equipment in any of the above method embodiments. Specifically, the computer may be the above-mentioned user equipment.

The present application further provides a computer readable storage medium, on which a computer program is stored, where the computer program is executed by a computer to implement a method flow related to a network device in any of the above method embodiments. Specifically, the computer may be the above-mentioned network device.

The present application further provides a computer program or a computer program product comprising a computer program, which when executed on a computer causes the computer to implement the method flow related to the user equipment in any of the above method embodiments. Specifically, the computer may be the above-mentioned user equipment.

The embodiment of the application also provides a chip, which comprises: the processing module is connected with the communication interface, and the processing module can execute the method flow related to the user equipment in any method embodiment. Further, the chip further includes a storage module (e.g., a memory) configured to store instructions, and the processing module is configured to execute the instructions stored in the storage module, and execution of the instructions stored in the storage module causes the processing module to execute the method flow related to the user equipment in any of the method embodiments described above.

It should be appreciated that the processors referred to in the embodiments of the present application may be central processing units (Central Processing Unit, CPU), but may also be other general purpose processors, digital signal processors (Digital Signal Processor, DSP), application specific integrated circuits (Application Specific Integrated Circuit, ASIC), off-the-shelf programmable gate arrays (Field Programmable Gate Array, FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, or the like. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.

It should also be understood that the memory referred to in the embodiments of the present application may be volatile memory or nonvolatile memory, or may include both volatile and nonvolatile memory. The nonvolatile Memory may be a Read-Only Memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an Electrically Erasable EPROM (EEPROM), or a flash Memory. The volatile memory may be random access memory (Random Access Memory, RAM) which acts as an external cache. By way of example, and not limitation, many forms of RAM are available, such as Static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double Data Rate SDRAM (Double Data Rate SDRAM), enhanced SDRAM (ESDRAM), synchronous DRAM (SLDRAM), and Direct RAM (DR RAM).

It should be noted that the memory described herein is intended to comprise, without being limited to, these and any other suitable types of memory.

The various embodiments described herein may be separate solutions or may be combined according to inherent logic, which fall within the scope of the present application.

In the embodiments provided in the present application, the methods provided in the embodiments of the present application are described from the perspective of interaction between the respective devices. In order to implement the functions in the methods provided in the embodiments of the present application, the first user device or the second user device may include a hardware structure and/or a software module, and implement the functions in the form of a hardware structure, a software module, or a hardware structure plus a software module. Some of the functions described above are performed in a hardware configuration, a software module, or a combination of hardware and software modules, depending on the specific application of the solution and design constraints.

The division of the modules in the embodiment of the present application is schematic, which is merely a logic function division, and other division manners may be implemented in practice. In addition, each functional module in the embodiments of the present application may be integrated in one processor, or may exist alone physically, or two or more modules may be integrated in one module. The integrated modules may be implemented in hardware or in software functional modules.

As with the above concept, as shown in fig. 15, the embodiment of the present application further provides an apparatus 1500 for implementing the function of the first user equipment or the second user equipment in the above method. For example, the apparatus may be a software module or a system on a chip. In the embodiment of the application, the chip system may be formed by a chip, and may also include a chip and other discrete devices. The apparatus 1500 may include: a processing unit 1501 and a communication unit 1502.

In this embodiment of the present application, the communication unit may also be referred to as a transceiver unit, and may include a sending unit and/or a receiving unit, which are configured to perform the steps of sending and receiving by the first user equipment or the second user equipment in the foregoing method embodiment, respectively.

The following describes in detail the communication device provided in the embodiment of the present application with reference to fig. 15 to 16. It should be understood that the descriptions of the apparatus embodiments and the descriptions of the method embodiments correspond to each other, and thus, descriptions of details not described may be referred to the above method embodiments, which are not repeated herein for brevity.

The communication unit may also be referred to as a transceiver, transceiving means, etc. The processing unit may also be called a processor, a processing board, a processing module, a processing device, etc. Alternatively, a device for implementing a receiving function in the communication unit 1502 may be regarded as a receiving unit, and a device for implementing a transmitting function in the communication unit 1502 may be regarded as a transmitting unit, that is, the communication unit 1502 includes a receiving unit and a transmitting unit. The communication unit may also be referred to as a transceiver, transceiver circuitry, or the like. The receiving unit may also be referred to as a receiver, or receiving circuit, among others. The transmitting unit may also sometimes be referred to as a transmitter, or a transmitting circuit, etc.

It should be understood that, the communication unit 1502 is configured to perform the sending operation and the receiving operation of the first user equipment in the method embodiment shown in fig. 4 or fig. 8 or fig. 10, and the processing unit 1501 is configured to perform other operations of the first user equipment except the transceiving operation in the method embodiment shown in fig. 4 or fig. 8 or fig. 10.

For example, in one implementation, the communication unit 1502 is configured to perform all of the transceiving steps of the first user equipment in the embodiment illustrated in fig. 4, e.g., to perform step 403, and/or to support other processes of the techniques described herein. A processing unit 1501 is configured to perform operations of the first user equipment in the embodiment shown in fig. 4 other than transceiving operations, for example, performing step 401, and/or other procedures for supporting the techniques described herein.

For example, in another implementation, the communication unit 1502 is configured to perform all of the transceiving steps of the first user equipment in the embodiment illustrated in fig. 8, e.g., to perform step 801, and/or other procedures for supporting the techniques described herein. A processing unit 1501 is configured to perform operations of the first user equipment in the embodiment shown in fig. 8 other than transceiving operations, for example, performing step 802, and/or other procedures for supporting the techniques described herein.

For example, in another implementation, the communication unit 1502 is configured to perform all of the transceiving steps of the first user equipment in the embodiment illustrated in fig. 10, e.g., to perform step 1001, and/or to support other procedures of the techniques described herein. A processing unit 1501 is configured to perform operations of the first user equipment in the embodiment shown in fig. 10 other than transceiving operations, for example, to perform step 1002, and/or to support other procedures of the techniques described herein.

As shown in fig. 16, an apparatus 1600 provided in an embodiment of the present application, where the apparatus shown in fig. 16 may be an implementation of a hardware circuit of the apparatus shown in fig. 15. The communication device may be adapted to perform the functions of the first user equipment or the second user equipment in the above-described method embodiments in the flowcharts shown above. For convenience of explanation, fig. 16 shows only major components of the communication apparatus.

The apparatus 1600 may also include at least one memory 1630 for storing program instructions and/or data. Memory 1630 is coupled to processor 1620. The coupling in the embodiments of the present application is an indirect coupling or communication connection between devices, units, or modules, which may be in electrical, mechanical, or other forms for information interaction between the devices, units, or modules. Processor 1620 may operate in conjunction with memory 1630. Processor 1620 may execute program instructions stored in memory 1630. At least one of the at least one memory may be included in the processor.

The apparatus 1600 shown in fig. 16 includes at least one processor 1620 and a communication interface 1610, where the processor 1620 is configured to execute instructions or programs stored in a memory 1630. When executed, the processor 1620 is configured to perform the operations performed by the processing unit 1501 in the above embodiment, and the communication interface 1610 is configured to perform the operations performed by the communication unit 1502 in the above embodiment.

In embodiments of the present application, the communication interface may be a transceiver, a circuit, a bus, a module, or other type of communication interface. In the embodiment of the application, when the communication interface is a transceiver, the transceiver may include a stand-alone receiver and a stand-alone transmitter; a transceiver integrating the transceiving function, or a communication interface, is also possible.

The apparatus 1600 may also include a communication line 1640. Wherein the communication interface 1610, the processor 1620 and the memory 1630 may be connected to each other by a communication line 1640; the communication line 1640 may be a peripheral component interconnect standard (peripheral component interconnect, PCI) bus or an extended industry standard architecture (extended industry standard architecture, EISA) bus, or the like. The communication lines 1640 may be divided into address buses, data buses, control buses, and the like. For ease of illustration, only one thick line is shown in fig. 16, but not only one bus or one type of bus.

In connection with the above, the present application also provides the following embodiments, and it should be noted that, the numbering of the following embodiments does not necessarily follow the numbering sequence of the previous embodiments:

embodiment 1, a multicast transmission method, wherein the method includes: the method comprises the steps that direct link connection is established between first user equipment and second user equipment; the first user equipment receives a first message from the second user equipment, wherein the first message comprises the position information of the second user equipment; the first user equipment sends auxiliary information according to the position information; the auxiliary information is used to indicate resources.

Embodiment 2, the method according to embodiment 1, wherein the first user equipment sends auxiliary information according to the location information, includes: the first user equipment determines the distance between the first user equipment and the second user equipment according to the position information; and when the distance is greater than or equal to a first distance threshold value, the first user equipment sends the auxiliary information to the second user equipment.

Embodiment 3, the method of embodiment 2, further comprising: the first user equipment determines the signal strength of the signal received by the second user equipment; and when the distance is smaller than the first distance threshold value and the signal strength is smaller than a first receiving signal strength threshold value, the first user equipment sends the auxiliary information to the second user equipment.

Embodiment 4, the method of embodiment 3, further comprising:

and when the distance is smaller than the first distance threshold value and the signal strength is larger than or equal to a first receiving signal strength threshold value, the first user equipment determines not to send the auxiliary information to the second user equipment.

Embodiment 5, the method according to embodiment 3 or 4, the first user equipment determining a signal strength of a signal received by the second user equipment, comprising: the first user equipment measures the first message to obtain a Received Signal Strength Indication (RSSI) or a Reference Signal Received Power (RSRP); the first user equipment determines the RSSI or RSRP as the signal strength.

Embodiment 6, the method of embodiment 2, further comprising: and when the distance is smaller than the first distance threshold value, the first user equipment determines not to send the auxiliary information to the second user equipment.

Embodiment 7, the method of any one of embodiments 2 to 6, wherein the first distance threshold is carried by the first message; alternatively, the first distance threshold value is preconfigured; alternatively, the first distance threshold is configured by the network device through higher layer signaling.

Embodiment 8, the method according to any one of embodiments 1 to 7, wherein the location information is an area reference number of an area where the second user equipment is located.

Embodiment 9, the method of any one of embodiments 1 to 8, further comprising: the first user equipment sends a second message to a third user equipment, wherein the second message comprises the position information of the first user equipment.

Embodiment 10, a message transmission method, comprising:

the method comprises the steps that a first user equipment receives N pieces of auxiliary information, wherein the N pieces of auxiliary information are from N pieces of second user equipment, the N pieces of auxiliary information are used for indicating at least one resource, the N pieces of auxiliary information comprise position information of the N pieces of second user equipment, and N is an integer larger than 0; and the first user equipment determines resources for carrying out data transmission according to N pieces of position information corresponding to the N pieces of auxiliary information.

Embodiment 11, a method according to embodiment 10, wherein the determining, by the first user equipment, resources for sending multicast data according to N location information corresponding to the N pieces of auxiliary information includes: the first user equipment determines N distances according to the N position information corresponding to the N auxiliary information, wherein one distance of the N distances is the distance between the first user equipment and one second user equipment of the N second user equipment; and the first user equipment determines the resource for data transmission from the at least one resource according to the N distances.

Embodiment 12 of the method of embodiment 10, wherein the determining, by the first user equipment, the resource for performing data transmission from the at least one resource according to the N distances includes: and the first user equipment determines the resource indicated by the auxiliary information corresponding to the largest distance in the N distances as the resource for carrying out data transmission.

Embodiment 13, the method according to embodiment 11, wherein the first user equipment determines the resource for data transmission from the at least one resource according to the N distances, including: the first user equipment determines at least one candidate resource from the at least one resource according to the N distances; the first user equipment determines a candidate resource from the at least one candidate resource as the resource for data transmission.

Embodiment 14, the method of embodiment 13, wherein the first user equipment determines candidate resources, including: for any one distance of the N distances, when the distance is greater than or equal to a second distance threshold value, the first user equipment determines resources indicated by auxiliary information for determining the distance as the candidate resources.

Embodiment 15, the method of embodiment 14, further comprising: for any one of the N distances, when the distance is smaller than the second distance threshold value and the signal strength of the auxiliary information for determining the distance is smaller than the second received signal strength threshold value, the first user equipment determines the resource indicated by the auxiliary information for determining the distance as the candidate resource.

Embodiment 16, the method according to embodiment 13 or 14, wherein the first user equipment determines one candidate resource from the at least one candidate resource as the resource for data transmission, including: the first user equipment takes the candidate resource with the largest corresponding distance in the at least one candidate resource as the resource for carrying out data transmission; or the first user equipment takes the candidate resource with the minimum signal strength of the corresponding auxiliary information in the at least one candidate resource as the resource for carrying out data transmission.

Embodiment 17 of the method of embodiment 11, wherein the determining, by the first user equipment, the resource for performing data transmission from the at least one resource according to the N distances includes: the first user equipment determines the weight of each resource in the at least one resource indicated by the N auxiliary information according to the N distances; the first user equipment determines the resource with the largest weight in the at least one resource as the resource for data transmission; or the first user equipment selects one resource from K resources with the largest weight as the resource for carrying out data transmission, wherein K is an integer greater than 0.

Embodiment 18 of the method according to embodiment 11, wherein the first user equipment determines the resource for data transmission from the at least one resource according to the L distances, including: the first user equipment determines the weight of each resource in the at least one resource according to the L distances and the signal strength of each auxiliary information in the L auxiliary information; the first user equipment determines the resource with the largest weight in the at least one resource as the resource for data transmission; or the first user equipment selects one resource from K resources with the largest weight as the resource for carrying out data transmission, wherein K is an integer greater than 0.

Embodiment 19 is the method of embodiment 18, wherein the signal strength of each of the N pieces of auxiliary information is a received signal strength indication RSSI or a reference signal received power RSRP obtained by measuring each of the auxiliary information for the first user equipment.

The embodiment of the present application further provides a computer readable storage medium, where a computer program is stored, where the program when executed by a processor may implement the flow related to the first user equipment in the embodiment shown in fig. 4 provided by the foregoing method embodiment.

The embodiment of the present application further provides a computer readable storage medium, where a computer program is stored, where the program may implement, when executed by a processor, a flow related to the first user equipment in the embodiment shown in fig. 8 provided by the foregoing method embodiment.

The embodiment of the present application further provides a computer readable storage medium, where a computer program is stored, where the program may implement, when executed by a processor, a procedure related to the first user equipment in the embodiment shown in fig. 10 provided by the foregoing method embodiment.

The embodiments of the present application also provide a computer program product comprising instructions that, when executed, perform the method of the first user equipment in the method embodiment shown in fig. 4.

The embodiment of the application further provides a computer program product containing instructions that, when executed, perform the method of the first user equipment in the method embodiment shown in fig. 8.

The embodiment of the application further provides a computer program product containing instructions that, when executed, perform the method of the first user equipment in the method embodiment shown in fig. 10.

The embodiment of the application further provides a chip, which comprises a processor, wherein the processor is coupled to the memory, and is used for executing a computer program or instructions stored in the memory, and when the processor executes the computer program or instructions, the method of the first user equipment in the method embodiment shown in fig. 4 is executed.

The embodiment of the application further provides a chip, which comprises a processor, wherein the processor is coupled to the memory, and is used for executing a computer program or instructions stored in the memory, and when the processor executes the computer program or instructions, the method of the first user equipment in the method embodiment shown in fig. 8 is executed.

The embodiment of the application further provides a chip, which comprises a processor, wherein the processor is coupled to the memory, and is used for executing a computer program or instructions stored in the memory, and when the processor executes the computer program or instructions, the method of the first user equipment in the method embodiment shown in fig. 10 is executed.

It should also be understood that the first, second, and various numerical numbers referred to herein are merely descriptive convenience and are not intended to limit the scope of the present application.

It should be understood that the term "and/or" is merely an association relationship describing the associated object, and means that three relationships may exist, for example, a and/or B may mean: a exists alone, A and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship.

It should be understood that, in various embodiments of the present application, the sequence number of each process does not mean that the sequence of execution is sequential, and some or all of the steps may be executed in parallel or sequentially, where the execution sequence of each process should be determined by its functions and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

It will be clear to those skilled in the art that, for convenience and brevity of description, specific working procedures of the above-described systems, apparatuses and units may refer to corresponding procedures in the foregoing method embodiments, and are not repeated herein.

In the several embodiments provided in this application, it should be understood that the disclosed systems, devices, and methods may be implemented in other manners. For example, the apparatus embodiments described above are merely illustrative, e.g., the division of the units is merely a logical function division, and there may be additional divisions when actually implemented, e.g., multiple units or components may be combined or integrated into another system, or some features may be omitted or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or units, which may be in electrical, mechanical or other form.

The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

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

The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer-readable storage medium. Based on such understanding, the technical solution of the present application may be embodied essentially or in a part contributing to the prior art or in a part of the technical solution, in the form of a software product stored in a storage medium, comprising several instructions for causing a computer device (which may be a personal computer, a server, a network device or a terminal device, etc.) to perform all or part of the steps of the methods described in the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (Random Access Memory, RAM), a magnetic disk, or an optical disk, or other various media capable of storing program codes.

Relevant parts among the method embodiments can be mutually referred to; the apparatus provided by each apparatus embodiment is configured to perform the method provided by the corresponding method embodiment, so each apparatus embodiment may be understood with reference to the relevant part of the relevant method embodiment.

The device configuration diagrams presented in the device embodiments of the present application only show a simplified design of the corresponding device. In practical applications, the apparatus may include any number of transmitters, receivers, processors, memories, etc. to implement the functions or operations performed by the apparatus in the embodiments of the apparatus of the present application, and all apparatuses capable of implementing the present application are within the scope of protection of the present application.

The names of the messages/frames/indication information, modules or units, etc. provided in the embodiments of the present application are only examples, and other names may be used as long as the roles of the messages/frames/indication information, modules or units, etc. are the same.

The terminology used in the embodiments of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in this application and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any or all possible combinations of one or more of the associated listed items. The character "/" herein generally indicates that the associated object is an "or" relationship.

The word "if" or "if" as used herein may be interpreted as "at … …" or "at … …" or "in response to a determination" or "in response to detection", depending on the context. Similarly, the phrase "if determined" or "if detected (stated condition or event)" may be interpreted as "when determined" or "in response to determination" or "when detected (stated condition or event)" or "in response to detection (stated condition or event), depending on the context.

Those of ordinary skill in the art will appreciate that all or some of the steps in implementing the methods of the above embodiments may be implemented by a program to instruct related hardware, where the program may be stored in a readable storage medium of a device, where the program includes all or some of the steps when executed, where the storage medium includes, for example: FLASH, EEPROM, etc.

The foregoing detailed description has set forth various embodiments for the purposes of providing a detailed description of the invention, including those of skill in the art, and it is to be understood that the invention is not limited to the specific embodiments described above, but is intended to cover all modifications, adaptations, alternatives, improvements, etc. as fall within the spirit and principles of the invention.

Claims

1. A method of message transmission, comprising:

the method comprises the steps that direct link connection is established between first user equipment and second user equipment;

the first user equipment receives a first message from the second user equipment, wherein the first message comprises the position information of the second user equipment;

the first user equipment sends auxiliary information according to the position information; the auxiliary information is used for indicating resources, and the resources indicated by the auxiliary information are used for data transmission of the second user equipment.

2. The method of claim 1, wherein the first user device sending auxiliary information according to the location information comprises:

the first user equipment determines the distance between the first user equipment and the second user equipment according to the position information;

and when the distance is greater than or equal to a first distance threshold value, the first user equipment sends the auxiliary information to the second user equipment.

3. The method according to claim 2, wherein the method further comprises:

the first user equipment determines the signal strength of the signal received by the second user equipment;

And when the distance is smaller than the first distance threshold value and the signal strength is smaller than a first receiving signal strength threshold value, the first user equipment sends the auxiliary information to the second user equipment.

4. A method according to claim 3, characterized in that the method further comprises:

5. The method according to claim 3 or 4, wherein the first user equipment determining the signal strength of the signal received by the second user equipment comprises:

the first user equipment measures the first message to obtain a Received Signal Strength Indication (RSSI) or a Reference Signal Received Power (RSRP);

the first user equipment determines the RSSI or RSRP as the signal strength.

6. The method according to claim 2, wherein the method further comprises:

and when the distance is smaller than the first distance threshold value, the first user equipment determines not to send the auxiliary information to the second user equipment.

7. The method according to any of claims 2 to 4, wherein the first distance threshold value is carried by the first message;

alternatively, the first distance threshold value is preconfigured;

alternatively, the first distance threshold is configured by the network device through higher layer signaling.

8. The method according to any one of claims 1 to 4, wherein the location information is a zone number of a zone in which the second user equipment is located.

9. The method according to any one of claims 1 to 4, further comprising:

the first user equipment sends a second message to a third user equipment, wherein the second message comprises the position information of the first user equipment.

10. A communication device comprising a processor and a memory:

the processor for executing a computer program or instructions stored in the memory, which, when executed, is adapted to carry out the method according to any one of claims 1 to 9.

11. A readable storage medium comprising a computer program or instructions which, when executed, performs the method of any one of claims 1 to 9.

12. A chip comprising a processor coupled to a memory for executing a computer program or instructions stored in the memory, which when executed by the processor, performs the method of any of claims 1 to 9.