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CN114125939B - Resource indication, resource selection method and device - Google Patents

Resource indication, resource selection method and device Download PDF

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Publication number
CN114125939B
CN114125939B CN202010896865.6A CN202010896865A CN114125939B CN 114125939 B CN114125939 B CN 114125939B CN 202010896865 A CN202010896865 A CN 202010896865A CN 114125939 B CN114125939 B CN 114125939B
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China
Prior art keywords
terminal
resource
communication
sidelink
data
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CN202010896865.6A
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Chinese (zh)
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CN114125939A (en
Inventor
王源泉
卢磊
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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Priority to CN202010896865.6A priority Critical patent/CN114125939B/en
Priority to PCT/CN2021/114090 priority patent/WO2022042489A1/en
Publication of CN114125939A publication Critical patent/CN114125939A/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/04—Error control
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/16—Central resource management; Negotiation of resources or communication parameters, e.g. negotiating bandwidth or QoS [Quality of Service]
    • H04W28/26—Resource reservation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/30—Services specially adapted for particular environments, situations or purposes
    • H04W4/40—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P]
    • H04W4/46—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P] for vehicle-to-vehicle communication [V2V]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling
    • H04W72/121—Wireless traffic scheduling for groups of terminals or users
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/56—Allocation or scheduling criteria for wireless resources based on priority criteria
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/56—Allocation or scheduling criteria for wireless resources based on priority criteria
    • H04W72/566—Allocation or scheduling criteria for wireless resources based on priority criteria of the information or information source or recipient
    • H04W72/569—Allocation or scheduling criteria for wireless resources based on priority criteria of the information or information source or recipient of the traffic information

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Quality & Reliability (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

一种资源指示、资源选择方法及装置，可以应用于D2D或车联网V2X等，或可以用于智能驾驶、智能网联车等领域。第一终端接收来自第二终端的第一侧行控制信息，第一侧行控制信息用于指示第二终端为侧行链路通信预约的第一资源，以及第一侧行控制信息包括待发送数据的第一优先级，第一终端还接收来自第三终端的第二侧行控制信息，第二侧行控制信息用于指示第三终端为侧行链路通信预约的第二资源，以及用于指示第三终端的待发送数据的第二优先级；在第一资源与第二资源有重叠且第二优先级高于第一优先级的情况下，第一终端向第二终端发送资源指示信息，资源指示信息用于指示第一终端为第二终端推荐的第三资源。

A resource indication and resource selection method and device can be applied to D2D or V2X, or can be used in the fields of intelligent driving, intelligent networked vehicles, etc. A first terminal receives first sidelink control information from a second terminal, the first sidelink control information is used to indicate the first resource reserved by the second terminal for sidelink communication, and the first sidelink control information includes a first priority of data to be sent. The first terminal also receives second sidelink control information from a third terminal, the second sidelink control information is used to indicate the second resource reserved by the third terminal for sidelink communication, and is used to indicate the second priority of data to be sent by the third terminal; when the first resource overlaps with the second resource and the second priority is higher than the first priority, the first terminal sends resource indication information to the second terminal, and the resource indication information is used to indicate the third resource recommended by the first terminal to the second terminal.

Description

Resource indication and resource selection method and device
Technical Field
The present application relates to the field of communications technologies, and in particular, to a method and apparatus for indicating and selecting resources.
Background
In the fifth generation mobile communication technology (the 5 th generation, 5G) new wireless (NR) system, there are mainly two transmission modes for car-to-car (vehicle to everything, V2X) communication: a mode, namely mode one (mode-1), is allocated for the base station; the other is a user-selected mode, namely mode two (mode-2). The user self-selection mode can be mainly applied to V2X communication under the condition of no network coverage, because the V2X terminal equipment can only select resources in a resource pool to send data by itself without uniform resource management of network equipment. In the user self-selection mode, a plurality of V2X terminal devices may all select resources in the same resource pool, and in order to reduce the probability of resource collision of the V2X terminal devices, a mode based on historical interception information is used for selecting resources at present. In this way, the V2X terminal device may continuously monitor the resource pool, for example, when the resource needs to be selected to transmit the data 1, the V2X terminal device may determine whether a certain resource is occupied by other terminal devices according to the history information, and determine whether the resource is used by the V2X terminal device for transmitting other data. If it is determined that the resource is not occupied by other V2X terminal devices and the resource is not occupied by other data transmitted by the V2X terminal device, the V2X terminal device may select the resource to transmit data 1.
As can be seen from the above description, the V2X terminal device needs to exclude the resources occupied by other V2X terminal devices in the resource pool, and the resources occupied by other data transmitted by the V2X terminal device. However, the V2X terminal device may still collide with the resources selected by the existing resource exclusion mechanism, resulting in communication failure.
Disclosure of Invention
The application provides a resource indication and selection method and device, which are used for avoiding the problem of resource waste caused by excessive resource indication signaling on one hand and reducing the probability of collision of resources under the condition that a terminal autonomously selects the resources on the other hand.
In a first aspect, an embodiment of the present application provides a method for indicating resources, including: the first terminal receives first side-line control information from the second terminal, wherein the first side-line control information is used for indicating first resources reserved by the second terminal for side-line communication and is used for indicating first priority of data to be sent by the second terminal. The first terminal receives second sidestream control information from a third terminal, wherein the second sidestream control information is used for indicating second resources reserved by the third terminal for sidestream link communication and indicating second priority of data to be sent of the third terminal; and under the condition that the first resource and the second resource are overlapped and the second priority is higher than the first priority, the first terminal sends resource indication information to the second terminal, wherein the resource indication information is used for indicating a third resource recommended by the first terminal for the second terminal.
In the embodiment of the application, on one hand, for the first terminal, the first terminal does not need to periodically report the resource indication information to the second terminal, but reports the resource indication information under the condition that the first resource and the second resource are overlapped and the second priority is higher than the first priority, thereby being beneficial to reducing signaling overhead and avoiding waste of transmission resources; on the other hand, for the second terminal, since the second terminal receives the resource indication information from the first terminal, when determining the transmission resource, not only the available resource detected by the second terminal but also the resource recommended by other terminals (such as the first terminal) can be considered, so that the second terminal is facilitated to reduce the probability of collision between the resource autonomously selected by the second terminal and the resource of other terminals under the condition of autonomously selecting the resource, and the second terminal is facilitated to improve the probability of successful communication by using the self-selected resource.
In one possible design, case one: the third resource may comprise the remaining resources of the first resource other than the second resource, e.g. the third resource is all or part of the remaining resources. And a second case: the third resource may include resources other than the first resource and the second resource in the resource listening window of the first terminal, e.g., the third resource may be selected from among the resources other than the first resource and the second resource in the resource listening window of the first terminal. And a third case: the third resource may be selected from the remaining resources, and resources other than the first resource and the second resource in the resource listening window of the first terminal. And the resource interception window selects n time slots before a time point for the first terminal resource, wherein n is a positive integer.
In the embodiment of the application, the third resource recommended by the first terminal and meeting the situation is beneficial to reducing the possibility of collision between the second terminal self-selected resource and other terminal resources, thereby being beneficial to improving the possibility of successful communication by using the self-selected resource by the second terminal.
In one possible design, the size of the third resource may be the same as the size of the data to be transmitted of the second terminal. The method is beneficial to the second terminal to accurately select enough resources to transmit the data to be transmitted, and the shortage of resources or the waste of resources are avoided.
In one possible design, the above method embodiments may be applied to the following scenarios: the second terminal and the first terminal belong to the same communication group, the second terminal is a scheduling terminal, and the first terminal belongs to at least one scheduled terminal in the communication group. That is, the first terminal may be one of the scheduled terminals in the communication group, or may be two or more of the scheduled terminals in the communication group. Alternatively, the third terminal may not belong to the communication group.
In the embodiment of the application, when the first terminal is two or more scheduled terminals in the communication group, the second terminal may receive two or more resource indication information, so that when determining to send resources, not only the available resources detected by the second terminal but also the resources recommended by the two or more scheduled terminals can be considered, thereby being beneficial to reducing the probability of collision between the resources autonomously selected by the second terminal and other terminal resources under the condition of autonomously selecting the resources by the second terminal, and being beneficial to improving the probability of successful communication by the second terminal using the autonomously selected resources.
In a second aspect, an embodiment of the present application provides a method for indicating resources, specifically including: the method comprises the steps that a first terminal determines data to be transmitted, wherein a destination terminal of the data to be transmitted is a third terminal, the first terminal transmits a resource request message to a second terminal, the resource request message is used for requesting side uplink resources, the resource request message comprises resource indication information, and the resource indication information is used for indicating first side uplink resources recommended by the first terminal and used for transmitting the data to be transmitted.
In the embodiment of the application, on one hand, for the first terminal, the first terminal does not need to periodically report the resource indication information to the second terminal, but reports the resource indication information when determining that data needs to be transmitted, thereby being beneficial to reducing signaling overhead and avoiding the waste of transmission resources; on the other hand, for the second terminal, since the second terminal receives the resource indication information from the first terminal, when determining the transmission resource, not only the available resource detected by the second terminal but also the resource recommended by other terminals (such as the first terminal) can be considered, so that the second terminal is facilitated to reduce the probability of collision between the resource autonomously selected by the second terminal and the resource of other terminals under the condition of autonomously selecting the resource, and the second terminal is facilitated to improve the probability of successful communication by using the self-selected resource.
In one possible design, the first terminal receives indication information of a transmission resource from the second terminal, where the transmission resource is determined by the second terminal according to a first side uplink resource and a second side uplink resource, and the second side uplink resource is a candidate resource obtained by interception by the second terminal, or a preconfigured resource, or a resource configured by the network device; the first terminal transmits data to the third terminal on the transmission resource.
In the embodiment of the application, for the second terminal, when determining the transmission resource, not only the second side uplink resource detected by the second terminal is considered, but also the first side uplink resource recommended by other terminals (such as the first terminal) is considered, so that the second terminal is facilitated to reduce the probability of collision between the resource selected by the second terminal and the other terminal resources under the condition of autonomously selecting the resource, and the probability of successful communication by the first terminal using the transmission resource is facilitated to be improved.
In one possible design, a first terminal receives indication information of a transmission resource from a second terminal, the transmission resource being determined by the second terminal according to the first side link resource; the first terminal transmits data to the third terminal on the transmission resource.
In the embodiment of the application, the first terminal selects to send data to the third terminal on the sending resource in the recommended first side link resource, which is beneficial to reducing the probability of collision between the first terminal and other terminal resources.
In one possible design, the above method embodiments may be applied to the following scenarios: the second terminal and the first terminal and the third terminal belong to the same communication group, the second terminal is a scheduling terminal, and the first terminal and the third terminal belong to at least two scheduled terminals in the communication group.
In the embodiment of the application, the transmission resources of the scheduled terminal in the scene are scheduled by the scheduling terminal, so that the transmission resources of different terminals in the scheduling terminal group are prevented from being collided.
In one possible design, the size of the first side uplink resource may be the same as the size of the data to be transmitted. The method is beneficial to the second terminal to accurately select enough resources to transmit the data to be transmitted, and the shortage of resources or the waste of resources are avoided.
In a third aspect, an embodiment of the present application provides a method for indicating resources, including: the second terminal determines a first candidate resource, wherein the first candidate resource is obtained by interception of the second terminal, or is preconfigured or is configured by network equipment; the second terminal receives at least two resource indication information from at least two first terminals respectively, wherein the resource indication information is used for indicating the first terminals to recommend second candidate resources for the second terminals; the second terminal determines a transmission resource from the first candidate resource and at least two second candidate resources; the second terminal and the at least two first terminals belong to the same communication group, the second terminal is a scheduling terminal, and the at least two first terminals are scheduled terminals.
In the embodiment of the application, the scheduling terminal determines the resources of the side uplink communication transmission according to the self-interception result and the recommended resources reported by two or more scheduled terminals, so that the probability of collision between the resources selected by the second terminal and other terminal resources is reduced under the condition of the second terminal selecting the resources independently, and the probability of successful communication by the first terminal using the transmission resources is improved.
In a fourth aspect, an embodiment of the present application provides a method for indicating resources, specifically including: the second terminal determines a first candidate resource, wherein the first candidate resource is obtained by interception of the second terminal, or is preconfigured or is configured by network equipment; the second terminal receives at least two resource indication information from at least two first terminals respectively, wherein the resource indication information is used for indicating the first terminals to recommend second candidate resources for the second terminals; the second terminal determines a sending resource from the first candidate resource and a target second candidate resource, wherein the target second candidate resource is the second candidate resource indicated by the resource indication information received nearest to the current moment; the second terminal and the at least two first terminals belong to the same communication group, the second terminal is a scheduling terminal, and the at least two first terminals are scheduled terminals.
In the embodiment of the application, the target second candidate resource is the second candidate resource indicated by the resource indication information received closest to the current moment, so that the resources which are reserved and occupied are helped to be accurately removed, and the scheduling terminal determines the resources of the side-link communication transmission according to the self-interception result and the target second candidate resource, so that the probability of collision between the resources selected by the second terminal and other terminal resources is helped to be reduced under the condition that the second terminal autonomously selects the resources, and the probability of successful communication when the first terminal uses the transmission resources is helped to be improved.
In a fifth aspect, a communication device is provided, for example, the communication device being a first terminal as described above or a chip provided inside the first terminal. The communication device is adapted to perform the method of the first aspect or any of the possible implementation manners of the first aspect. In particular, the communication device may comprise means for performing the method of the first aspect or any of the possible implementations of the first aspect, e.g. comprising a processing unit and a transceiver unit. Wherein,
The receiving and transmitting unit is used for receiving the first lateral control information from the second terminal; the first side control information is used for indicating a first resource reserved by the second terminal for side uplink communication and is used for indicating a first priority of data to be sent by the second terminal.
The receiving and transmitting unit is further used for receiving second sidestream control information from a third terminal, wherein the second sidestream control information is used for indicating second resources reserved by the third terminal for sidestream link communication and indicating second priority of data to be transmitted of the third terminal;
And the receiving and transmitting unit is further configured to send resource indication information to the second terminal, where the resource indication information is used to indicate a third resource recommended by the first terminal for the second terminal, where the first resource and the second resource overlap and the second priority is higher than the first priority.
In one possible design, the third resource includes a remaining resource other than the second resource in the first resource, and/or the third resource includes a resource other than the first resource and the second resource in a resource listening window of the first terminal, where the resource listening window is n slots before a time point of resource selection of the first terminal, and n is a positive integer.
In one possible design, the size of the third resource is the same as the size of the data to be transmitted of the second terminal.
In one possible design, the second terminal and the first terminal belong to the same communication group, the second terminal is a scheduling terminal, and the first terminal belongs to at least one scheduled terminal in the communication group.
In one possible design, the third terminal does not belong to the communication group. Regarding the technical effects of the fifth aspect or the various possible embodiments of the fifth aspect, reference may be made to the description of the technical effects of the first aspect or the corresponding embodiments of the first aspect.
In a sixth aspect, a communication device is provided, for example, the communication device being the first terminal or a chip provided inside the first terminal as described above. The communication device is adapted to perform the method of the second aspect or any of the possible implementations of the second aspect. In particular, the communication device may comprise means for performing the method of the second aspect or any of the possible implementations of the second aspect, e.g. comprising a processing unit and a transceiver unit. Wherein,
The processing unit is used for determining data to be sent, and a destination end of the data to be sent is a third terminal;
The receiving and transmitting unit is configured to send a resource request message to a second terminal, where the resource request message is used for requesting a side uplink resource, and the resource request message includes resource indication information, where the resource indication information is used for indicating a first side uplink resource recommended by the first terminal and used for sending the data to be sent.
In one possible design, the transceiver is further configured to receive indication information of a transmission resource from the second terminal, where the transmission resource is determined by the second terminal according to the first side uplink resource and a second side uplink resource, and the second side uplink resource is a candidate resource obtained by interception by the second terminal, or a preconfigured resource, or a resource configured by a network device; the transceiver unit is further configured to send data to the third terminal on the transmission resource.
In one possible design, the transceiver unit is further configured to receive indication information of a transmission resource from the second terminal, where the transmission resource is determined by the second terminal according to the first side-link resource; and the receiving and transmitting unit is also used for transmitting data to the third terminal on the transmission resource.
In one possible design, the second terminal and the first terminal and the third terminal belong to the same communication group, the second terminal is a scheduling terminal, and the first terminal and the third terminal belong to at least two scheduled terminals in the communication group.
In one possible design, the size of the first side uplink resource is the same as the size of the data to be transmitted.
Regarding the technical effects of the sixth aspect or the various possible embodiments of the sixth aspect, reference may be made to the description of the technical effects of the second aspect or the corresponding embodiments of the second aspect.
In a seventh aspect, a communication device is provided, for example, the communication device being the second terminal as described above or a chip provided inside the second terminal. The communication device is adapted to perform the method of the third aspect or any of the possible implementations of the third aspect. In particular, the communication device may comprise means for performing the method of the third aspect or any possible implementation of the third aspect, e.g. comprising a processing unit and a transceiver unit. Wherein,
The processing unit is configured to determine a first candidate resource, where the first candidate resource is obtained by interception of the second terminal, or is preconfigured, or is configured by a network device;
The receiving and transmitting unit is used for receiving at least two resource indication information from at least two first terminals respectively, wherein the resource indication information is used for indicating second candidate resources recommended by the first terminals for the second terminals;
The processing unit is configured to determine a transmission resource from the first candidate resource and at least two second candidate resources;
The second terminal and the at least two first terminals belong to the same communication group, the second terminal is a scheduling terminal, and the at least two first terminals are scheduled terminals.
Regarding the technical effects of the seventh aspect or the various possible embodiments of the seventh aspect, reference may be made to the introduction of the technical effects of the third aspect or the corresponding embodiments of the third aspect.
In an eighth aspect, a communication device is provided, for example, the communication device being the second terminal or a chip arranged inside the second terminal as described above. The communication device is adapted to perform the method of the fourth aspect or any of the possible implementations of the fourth aspect. In particular, the communication device may comprise means for performing the method of the fourth aspect or any possible implementation of the fourth aspect, e.g. comprising a processing unit and a transceiver unit. Wherein,
The processing unit is configured to determine a first candidate resource, where the first candidate resource is obtained by interception of the second terminal, or is preconfigured, or is configured by a network device;
The receiving and transmitting unit is used for receiving at least two resource indication information from at least two first terminals respectively, wherein the resource indication information is used for indicating second candidate resources recommended by the first terminals for the second terminals;
the processing unit is used for determining a sending resource from the first candidate resource and the target second candidate resource;
the second terminal and the at least two first terminals belong to the same communication group, the second terminal is a scheduling terminal, the at least two first terminals are scheduled terminals, and the target second candidate resource is a second candidate resource indicated by resource indication information received nearest to the current moment.
Regarding the technical effects of the eighth aspect or the various possible embodiments of the eighth aspect, reference may be made to the description of the technical effects of the corresponding embodiments of the fourth aspect or the fourth aspect.
In a ninth aspect, the present application provides a communication device, which may be a first terminal or a chip provided inside the first terminal. The communication device has functions of implementing the first aspect, for example, the communication device includes functions or units or means (means) corresponding to the steps related to the first aspect, where the functions or units or means may be implemented by software, or implemented by hardware, or implemented by executing corresponding software by hardware.
In one possible design, the communication device includes a processor, and may further include a transceiver, where the transceiver is configured to receive signals, and where the processor executes program instructions to perform the method in any possible design or implementation of the first aspect and the second aspect. Wherein the communication device may further comprise one or more memories for coupling with the processor. The one or more memories may be integrated with the processor or may be separate from the processor, and the present application is not limited. The memory may hold the necessary computer programs or instructions to implement the functions referred to in the above first and second aspects. The processor may execute a computer program or instructions stored by the memory, which when executed, cause the communication device to implement the method in any of the possible designs or implementations involved in the first terminal in the first and second aspects described above.
In one possible design, the communication device includes a processor and a memory, where the memory may hold necessary computer programs or instructions to implement the functions referred to in the first aspect above. The processor may execute a computer program or instructions stored by the memory, which when executed, cause the communication device to implement the method in any of the possible designs or implementations involved in the first terminal in the first and second aspects described above.
In one possible design, the communication device includes at least one processor and an interface circuit, where the at least one processor is configured to communicate with other devices through the interface circuit and perform the method performed by the first terminal in any possible design or implementation of the first aspect, the second aspect, and the third aspect.
Regarding the technical effects of the ninth aspect or the various possible embodiments of the ninth aspect, reference may be made to the description of the technical effects of the corresponding embodiments of the first and second aspects.
The communication device in the above aspect may be a terminal device, or may be a chip applied to the terminal device or other combination devices, components, etc. capable of implementing the functions of the terminal device. The transceiver unit may be a transmitter and a receiver when the communication device is a terminal device, or an integrated transceiver may include an antenna and radio frequency circuits, etc., and the processing unit may be a processor, such as a baseband chip, etc. When the communication device is a component having the above-mentioned terminal equipment function, the transceiver unit may be a radio frequency unit, and the processing unit may be a processor. When the communication device is a chip system, the transceiver unit may be an input/output interface of the chip system, and the processing unit may be a processor of the chip system, for example: a central processing unit (central processing unit, CPU).
In a tenth aspect, the present application provides a communication device, which may be a second terminal or a chip provided inside the second terminal. The communication device is provided with a function of implementing the second terminal aspect, for example, the communication device includes a function or a unit or a means corresponding to the steps of the third aspect and the fourth aspect, and the function or the unit or the means may be implemented by software, or implemented by hardware, or implemented by executing corresponding software by hardware.
In one possible design, the communication device includes a processor, and may further include a transceiver, where the transceiver is configured to receive signals, and where the processor executes program instructions to perform the method in any possible design or implementation of the third aspect and the fourth aspect. Wherein the communication device may further comprise one or more memories for coupling with the processor. The one or more memories may be integrated with the processor or may be separate from the processor, and the present application is not limited. The memory may hold the necessary computer programs or instructions to implement the functions of the third and fourth aspects described above. The processor may execute a computer program or instructions stored by the memory, which when executed, cause the communication device to implement the method in any of the possible designs or implementations of the third and fourth aspects described above.
In one possible design, the communication device includes a processor and a memory, where the memory may hold the necessary computer programs or instructions to implement the functions referred to in the third and fourth aspects above. The processor may execute a computer program or instructions stored by the memory, which when executed, cause the communication device to implement the method performed by the second terminal in any of the possible designs or implementations of the third and fourth aspects described above.
In one possible design, the communication device includes at least one processor and an interface circuit, where the at least one processor is configured to communicate with other devices through the interface circuit and perform the method in any of the possible designs or implementations of the second terminal side.
In an eleventh aspect, the present application provides a computer-readable storage medium having stored therein computer-readable instructions which, when read and executed by a computer, cause the computer to perform the method in any of the possible designs of the above aspects.
In a twelfth aspect, the application provides a computer program product which, when read and executed by a computer, causes the computer to perform the method of any of the possible designs of the above aspects.
In a thirteenth aspect, the present application provides a chip comprising a processor coupled to a memory for reading and executing a software program stored in the memory to implement a method in any one of the possible designs of the above aspects.
Drawings
FIG. 1 is a schematic diagram of V2X communication according to an embodiment of the present application;
Fig. 2A and fig. 2B are schematic diagrams of frequency domain resources of a communication resource pool according to an embodiment of the present application;
fig. 3 is a schematic diagram of two communication scenarios provided in an embodiment of the present application;
FIG. 4A is a flow chart of a method of selecting resources;
FIGS. 4B and 4C are schematic diagrams of a resource listening window and a resource selection window;
FIG. 5 is a schematic diagram of another communication scenario according to an embodiment of the present application;
FIG. 6 is a schematic diagram of a communication system architecture according to an embodiment of the present application;
FIG. 7 is a flowchart of a resource indication method according to an embodiment of the present application;
FIG. 8 is a schematic diagram of a third resource according to an embodiment of the present application;
FIG. 9A is a flowchart of another method for indicating and selecting resources according to an embodiment of the present application;
FIG. 9B is a schematic diagram of another communication scenario according to an embodiment of the present application;
FIG. 10 is a flowchart of a resource indication and selection method according to an embodiment of the present application;
FIG. 11 is a schematic diagram of another communication scenario according to an embodiment of the present application;
Fig. 12A is a schematic structural diagram of a communication device according to an embodiment of the present application;
Fig. 12B is a schematic structural diagram of another communication device according to an embodiment of the present application.
Detailed Description
The technical scheme of the application is described below with reference to the attached drawings.
It should be understood that the technical solution of the embodiment of the present application may be applied to a 5G communication system, even to a future 5G communication system, etc., which is not limited in this embodiment of the present application.
In the embodiments of the present application, "at least one" means one or more, and "a plurality" means two or more. "and/or", describes an association relationship of an association object, and indicates that there may be three relationships, for example, a and/or B, and may indicate: a alone, a and B together, and B alone, wherein A, B may be singular or plural. The character "/" generally indicates that the context-dependent object is an "or" relationship. "at least one (item) below" or the like, refers to any combination of these items, including any combination of single item(s) or plural items(s). For example, at least one (one) of a, b or c may represent: a, b, c, a and b, a and c, b and c, or a, b and c, wherein each of a, b, c may itself be an element, or may be a collection comprising one or more elements.
In embodiments of the application, "exemplary," "in some embodiments," "in another embodiment," etc. are used to indicate by way of example, illustration, or description. Any embodiment or design described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments or designs. Rather, the term use of an example is intended to present concepts in a concrete fashion.
"Of", corresponding (corresponding, relevant) and "corresponding (corresponding)" in the embodiments of the present application may be sometimes mixed, and it should be noted that the meanings to be expressed are consistent when the distinction is not emphasized. Communication, transmission, etc. may sometimes be mixed in embodiments of the present application, it should be noted that the meaning expressed is consistent with the de-emphasis. For example, a transmission may include sending and/or receiving, either nouns or verbs.
It should be noted that the terms "first," "second," and the like in the embodiments of the present application are used for distinguishing between the descriptions and not necessarily for indicating or implying a relative importance or order. The equal to the embodiment of the application can be used with the greater than the adopted technical proposal when the ratio is greater than the adopted technical proposal, can also be used with the lesser than the adopted technical proposal, the technical scheme adopted when the power is smaller than the power is applicable, and the power is required to be used when the power is equal to or greater than the power, and is not used when the power is not less than the power; when the value is equal to or smaller than that used together, the value is not larger than that used together.
The terminal device according to the embodiments of the present application may be a device that provides voice and/or data connectivity to a user, and may also be referred to as a User Equipment (UE), a Mobile Station (MS), a Mobile Terminal (MT), or the like. Such as a handheld device, an in-vehicle device, etc., having a wireless connection function. Currently, examples of some terminal devices are: a mobile phone), a tablet, a notebook, a palm, a mobile internet device (mobile INTERNET DEVICE, MID), a wearable device, a Virtual Reality (VR) device, an augmented reality (augmented reality, AR) device, a wireless terminal in industrial control (industrial control), a wireless terminal in unmanned (SELF DRIVING), a wireless terminal in teleoperation (remote medical surgery), a wireless terminal in smart grid (SMART GRID), a wireless terminal in transportation security (transportation safety), a wireless terminal in smart city (SMART CITY), a wireless terminal in smart home (smart home), and the like.
The network device according to the embodiment of the present application may refer to a device in a wireless network, for example, a radio access network (radio access network, RAN) node (or device) that accesses a terminal device to the wireless network, which may also be referred to as a base station. Currently, some examples of RAN nodes are: a further evolved Node B (gNB), a transmission and reception point (transmission reception point, TRP), an evolved Node B (eNB), a radio network controller (radio network controller, RNC), a Node B (Node B, NB), a base station controller (base station controller, BSC), a base transceiver station (base transceiver station, BTS), a home base station (e.g., home evolved NodeB, or home Node B, HNB), a baseband unit (BBU), or a wireless fidelity (WIRELESS FIDELITY, wifi) Access Point (AP), etc. In addition, in one network architecture, the RAN may include a centralized unit (centralized unit, CU) node and a Distributed Unit (DU) node. The structure splits the protocol layer of the eNB in a long term evolution (long term evolution, LTE) system, the functions of part of the protocol layer are controlled in a CU (central control unit), and the functions of the rest part or all of the protocol layer are distributed in DUs, and the CU controls the DUs in a centralized manner.
The embodiment of the application relates to Core Network (CN) equipment. The CN device corresponds to different devices in different communication systems, for example, corresponds to a serving GPRS support node (SERVING GPRS support node, SGSN) or a gateway GPRS support node (GATEWAY GPRS support node, GGSN) in a 3G system, corresponds to a mobility management entity (mobility MANAGEMENT ENTITY, MME) or a serving gateway (SERVING GATEWAY, S-GW) in a 4G system, and corresponds to a Core network related device (e.g., NG-Core) of a 5G system in a 5G system.
In order to facilitate understanding of the present application, a part of the terms used in the present application will be explained first.
1) End-to-end (D2D) communication is a method that allows multiple D2D capable terminals to directly discover and communicate with or without a network infrastructure under control of a system.
V2X communication can be seen as a special case of D2D communication, V2X communication being a type of Sidelink (SL) communication, meaning communication of a vehicle with anything from the outside, including vehicle-to-vehicle (vehicle to vehicle, V2V) communication, vehicle-to-pedestrian (vehicle to pedestrian, V2P) communication, vehicle-to-infrastructure (vehicle to infrastructure, V2I) communication, vehicle-to-network (vehicle to network, V2N) communication, etc. Wherein the V2V communication may be as shown in (a) of fig. 1, the V2P communication may be as shown in (b) of fig. 1, and the V2I communication or the V2N communication may be as shown in (c) of fig. 1.
The V2X communication can be directly communicated between vehicles, so that the state information and road surface conditions of other vehicles can be acquired in real time, and the vehicle driving can be better assisted, and even automatic driving can be realized.
2) And the air interface resource, and in the cell, the base station and the UE can perform data transmission through the air interface resource. The air interface resources may include time domain resources and frequency domain resources, which may also be referred to as time-frequency resources. The time-frequency resource may be a resource grid comprising a time domain and a frequency domain. For example, the time domain unit may be a symbol (symbol), and the frequency domain unit may be a subcarrier (subcarrier). The smallest resource unit in the resource grid may be referred to as a Resource Element (RE). One Resource Block (RB) may include one or more subcarriers in the frequency domain, for example, may be 12 subcarriers. One slot may include one or more symbols in the time domain, such as one slot in NR may include 14 symbols (under a normal Cyclic Prefix (CP)) or 12 symbols (under an extended cyclic prefix). The frequency domain resource may be located in a set frequency range, which may also be referred to as a band (band) or a frequency band, and the width of the frequency domain resource may be referred to as a Bandwidth (BW).
3) The V2V communication resource pool can be regarded as a set of time domain resources and frequency domain resources for V2V communication. The time-frequency resources for V2V communication are configured based on the V2V communication resource pool.
Taking LTE V2X as an example, on the one hand: for the time domain resources of the V2V communication resource pool, as shown in fig. 2A, the base station adopts a bit map for indicating the subframes for V2V communication among all subframes in the system, and periodically repeats the bit map, and the length of one bit map in fig. 2A is 8 bits. On the other hand: for the frequency domain resources of the V2V communication resource pool, the base station divides the frequency band for V2V communication into several sub-channels, each sub-channel containing a certain number of resource blocks. Fig. 2B shows a frequency domain resource diagram of a communication resource pool, in which a base station indicates a sequence number of a first resource block of a frequency domain resource for V2V communication, the communication resource pool includes a total number N of subchannels, and each subchannel includes a number N CH of resource blocks. A V2V transmission may occupy one or more subchannels at a time. In scheduling V2X communication resources, scheduling is performed with sub-channel granularity in the frequency domain.
Currently, in the NR V2X network, in the base station allocation mode, side uplink resources are allocated to a terminal by a base station, and are mainly applied to a scenario with network coverage. One possible implementation is: the base station can intensively allocate side uplink resources for the terminals in the coverage area of the base station according to the buffer status report (buffer state report, BSR) of the terminals in the coverage area of the base station, so that V2X communication can be realized between the terminals in the coverage area of the base station. For example, as shown in (a) of fig. 3, the coverage area of the base station 03 includes the terminal 01 and the terminal 02, and the base station 03 may allocate side uplink resources to the terminal 01 and the terminal 02 according to the BSR of the terminal 01 and the BSR of the terminal 02, so that V2X communication between the terminal 01 and the terminal 02 may be achieved. In particular, it should be noted that, the side uplink resources allocated by the base station include initial resources and/or retransmission resources, and in the base station allocation mode, the side transmission resources of each terminal are uniformly scheduled by the base station, so that collision of the resources can be avoided.
Specifically, in the user self-selection mode, the side uplink resource is selected by the terminal autonomously, so that the limitation of network coverage can be avoided, and the method can be applied to a scene with network coverage or a scene without network coverage. For example, as shown in (b) of fig. 3, if the terminal 01 and the terminal 02 are not within the coverage of the base station 03, if the terminal 01 needs to transmit data to the terminal 02, the terminal 01 may autonomously select resources to realize data transmission to the terminal 02. In particular, it should be noted that the resources autonomously selected by the terminal include initial resources and/or retransmission resources.
In the user self-selection mode, the V2X terminal device can only select resources from the resource pool configured by the network device to perform V2X communication by itself because of no uniform resource management of the network device. For example, for a cell, a network device is uniformly configured with a resource pool, and then multiple V2X terminal devices of the cell select resources in the resource pool. In order to reduce the probability of resource collision of the V2X terminal device, a method of selecting resources based on historical interception information is introduced. For example, the current process of autonomously selecting resources by the terminal may include the following steps as shown in fig. 4A:
In step 401, the second terminal receives the side uplink control information (sidelink control information, SCI) sent by the other terminal in the resource listening window (serving windows).
In connection with fig. 4C, before the data to be transmitted arrives at the subframe n, the second terminal looks at the history listening information of a plurality of subframes (for example, from n-T to n-1) before the subframe n, for example, SCI transmitted by other terminals. Wherein, the SCI contains resource indication information, which is used for indicating the resource A in the reserved resource pool of other terminals in the resource selection window (selection windows).
For example, the positional relationship of the resource listening window and the resource selection window may be as shown in fig. 4B, and the resource listening window occurs before the resource selection window in the time domain. The time slot corresponding to the [ n-T, n-1] interval is the time slot occupied by the resource interception window in the time domain, and the time slot corresponding to the [ n+T1, n+T2] interval is the time slot occupied by the resource selection window in the time domain, wherein T, T, T2 and n are all positive integers.
In step 402, if the resource a is located in the resource selection window, the second terminal performs Reference Signal Received Power (RSRP) measurement on the resource a to obtain an RSRP measurement result.
Specifically, the second terminal obtains RSRP measurement results by measuring RSRP on a physical side uplink shared channel (PHYSICAL SIDELINK SHARE CHANNEL, PSSCH) or a physical side uplink control channel (PHYSICAL SIDELINK control channe, PSCCH) of the resource a.
Step 403, the second terminal determines a resource interception result according to the RSRP measurement result, where the resource interception result is used to indicate candidate resources in the resource pool in the resource selection window.
In a possible scenario, if the RSRP measurement result of the resource a is higher than the RSRP threshold Th RSRP, the candidate resources in the resource pool are other resources in the communication resource pool than the resource a whose RSRP measurement result is higher than the RSRP threshold Th RSRP.
It should be noted that, the initial value of the RSRP threshold Th RSRP may be predefined, or may be determined by the second terminal based on a certain algorithm or policy. For example, in the case where the initial value of the RSRP threshold Th RSRP is a function of the traffic priority of the data to be transmitted by the terminal itself and the traffic priority of the data indicated in the SCI received from the other terminal, the second terminal determines the initial value of the RSRP threshold Th RSRP according to the traffic priority of the data to be transmitted by the terminal itself and the traffic priority of the data indicated in the SCI received.
Step 404, the second terminal determines whether the remaining candidate resources in the resource selection window exceed the set ratio of all candidate resources, if the set ratio is not exceeded, step 405 is executed, and if the set ratio is exceeded, step 406 is executed.
For example, the ratio is set to 20%. The candidate resources remaining in the resource pool may be other resources in the resource pool except for the resource a whose RSRP measurement result is higher than the RSRP threshold Th RSRP. The whole candidate resources may be preconfigured to the second terminal by the base station, or may be configured to the second terminal by the network device.
In step 405, the second terminal raises the RSRP threshold Th RSRP by 3dB, and re-executes step 403.
In step 406, the second terminal selects a side uplink resource for data transmission with the first terminal from the candidate resources remaining in the resource selection window.
As can be seen from fig. 4A, in the user self-selection mode, the second terminal considers only the resource interception result of its own terminal side, and thus it is easy to cause the collision of the side uplink resource selected by the second terminal for data transmission with the opposite receiving terminal with the resource used for communication by the terminals around the opposite receiving terminal side, thereby causing the failure of data transmission on the side uplink resource autonomously selected by the second terminal.
For example, as shown in fig. 5, the transmitting end UE1 transmits side line control and data to the receiving end UE1 on the selected resource a, but the transmitting end UE2 near the receiving end UE1 also transmits side line control and data to the receiving end UE2 on the resource a (the transmitting end UE1 is out of the transmission range of the transmitting end UE2 and thus the resource a is considered as a candidate resource), so that the receiving end UE1 may be interfered by the transmitting end UE2 on the resource a, and may not correctly receive side line transmission of the transmitting end UE1, and communication failure between the transmitting end UE1 and the receiving end UE1 may be easily caused due to resource collision.
In order to solve the problem shown in fig. 5, one solution that is currently presented is: the first terminal actively reports recommended resource information to the second terminal, or the second terminal indicates the first terminal to report the recommended resource information, so that the second terminal can configure the side uplink communication resource of the first terminal according to the recommended resource information sent by the first terminal and the interception result of the second terminal, so as to reduce the possibility of collision of the resource, reduce communication interference, and improve the resource utilization rate and the success rate of side uplink communication. However, the method can cause the problems of high signaling overhead and resource waste due to frequent report of recommended resource information.
In view of this, the embodiment of the present application provides a resource indication method, which is helpful for a first terminal to trigger the first terminal to report recommended resource information to a second terminal by using received sidestream control information, for example SCI, so as to avoid the problem of transmission resource waste caused by the first terminal periodically reporting recommended resources.
The embodiment of the application can be applied to Side Link (SL) communication scenes in a wireless communication system, such as a V2X communication scene, a device-to-device (D2D) communication scene and the like. For example, the embodiment of the application can be applied to an NR V2X communication scene, an NR D2D communication scene, an LTE V2X communication scene and the like. The embodiment of the application can also be applied to the Internet of vehicles, such as V2X, LTE-V, V V and the like, or applied to the fields of intelligent driving, intelligent network vehicle connection and the like. Or the embodiment of the application can also be applied to other scenes or other communication systems, for example, the resource selection of Uu interfaces of an LTE system or an NR system can also be used, and the method is not particularly limited.
The terminal for side-link communication may be located within the coverage of the network device or may be free of network coverage. For example, as shown in fig. 6, a communication scenario in which the terminal 01 and the terminal 02 perform SL communication may be a scenario in which the terminal 01 is located within a coverage area of the network device 03 and the terminal 02 is located outside the coverage area of the network device 03. Or a scenario in which terminal 04 and terminal 05 are in side-link communication, where both terminal 04 and terminal 05 are outside the coverage of network device 03.
The network device in fig. 6 is, for example, an access network device, such as a base station, or may also be a Road Side Unit (RSU), etc., and the base station is taken as an example in fig. 6. The access network device may correspond to different devices in different systems, for example, eNB in the fourth generation mobile communication technology (the 4th generation,4G) system, and to access network device in 5G in the 5G system, for example, the gNB. The terminal device in fig. 6 is an example of a vehicle-mounted terminal device or a car, but the terminal device in the embodiment of the present application is not limited thereto. It can be understood that the embodiment of the application can also be applied to the scenes of recommending resources and selecting resources by the terminal in other communication systems.
It should be understood that the data to be transmitted of the terminal involved in the embodiment of the present application may include at least one of side uplink traffic data, side uplink control information, and side uplink feedback information. Wherein the sidelink traffic data is carried on a PSSCH, the sidelink control information is carried on a Physical Sidelink Control Channel (PSCCH), and the sidelink feedback information is carried on a physical sidelink feedback physical feedback channel (PHYSICAL SIDELINK feedback channel, PSFCH). Hereinafter, side uplink traffic data will be mainly described as an example, and simply referred to as data.
It should also be understood that the terminal device "transmits" data, and that the terminal device "sends" data, or that other descriptions may be used, and embodiments of the present application are not limited in this respect.
The technical scheme provided by the embodiment of the application is described below with reference to the accompanying drawings.
An embodiment of the present application provides a method for indicating resources, please refer to fig. 7, which is a flowchart of the method. In the following description, this method is taken as an example applied to the network architecture shown in fig. 6. In addition, the method may be performed by two communication devices, such as a first communication device and a second communication device. The first communication device may be the first terminal, or a communication device capable of supporting the first terminal to implement the functions required by the method, for example, a component included in the first terminal, or the first communication device may be the first terminal, or a communication device capable of supporting the first terminal to implement the functions required by the method, for example, a component included in the first terminal, but of course, the first communication device may also be other communication devices, for example, a chip system in the first terminal, and the like. Similarly, the second communication device may be the second terminal, or a communication device capable of supporting the second terminal to implement the functions required by the method, for example, a component included in the second terminal, or the second communication device may be the second terminal, or a communication device capable of supporting the second terminal to implement the functions required by the method, for example, a component included in the second terminal, although the second communication device may also be other communication devices, for example, a chip system in the second terminal. And the implementation manner of the first communication apparatus and the second communication apparatus is not limited, for example, the two communication apparatuses may be implemented in the same form, for example, in the form of a device, or the two communication apparatuses may be implemented in different forms, for example, the first communication apparatus is implemented in the form of a device, the second communication apparatus is implemented in the form of a chip system, and so on. In the embodiment of the present application, a communication device capable of implementing the function of the first terminal may be referred to as a first communication device, and a communication device capable of implementing the function of the second terminal may be referred to as a second communication device.
For convenience of description, hereinafter, the resource indication method according to the embodiment of the present application will be described in detail by taking the method performed by the second terminal and the first terminal as an example.
Fig. 7 is a flowchart of a resource indication method according to an embodiment of the present application, where the method may include the following steps.
In step 701, the second terminal sends first lateral control information to the first terminal. The first side control information is used for indicating a first resource reserved by the second terminal for side uplink communication, and the first side control information is also used for indicating a first priority of data to be sent by the second terminal.
That is, the second terminal reserves the first resource for the side-uplink communication between the first terminal and the second terminal before transmitting data to the first terminal. For example, if the data to be transmitted by the second terminal is periodic transmission data, the second terminal typically reserves resources for transmitting the data. If the data to be transmitted is aperiodic transmission data, the second terminal configures the first resource for the data to be transmitted, or the network device configures the first resource for the data to be transmitted of the second terminal.
Wherein the first side-link control information may be carried in side-link control information (sidelink control information, SCI). Illustratively, taking the first side control information as the first SCI as an example, a "time and frequency resource assignment (time domain and frequency domain resource indication)" field in the first SCI indicates a time-frequency location of the first resource, a "priority" field in the first SCI indicates a value of prioRX, and prioRX indicates a first priority of data to be transmitted of the second terminal, where a lower value of prioRX indicates a higher priority.
In addition, the first side control information may further indicate a resource location of a reference signal corresponding to the reference signal received power, so that the first terminal may measure the reference signal according to the resource location indicated by the first side control information to obtain a measurement result, where the measurement result includes RSRP, for example, and may include other information, and the reference signal corresponding to the reference signal received power may be a received power of a demodulation reference signal (demodulation REFERENCE SIGNAL, DMRS) on PSSCH or PSCCH.
In step 702, the third terminal sends second sidestream control information to the first terminal. The second sidestream control information is used for indicating a second resource reserved by the third terminal for sidestream link communication, and the second sidestream control information is also used for indicating a second priority of data to be sent by the third terminal.
In other words, the third terminal reserves the second resource for the side-uplink communication between the third terminal and the fourth terminal before transmitting data to the fourth terminal. When the third terminal is in the vicinity of the first terminal but not within the transmission range of the second terminal, the third terminal may take the first resource as a candidate resource, and thus the second resource reserved by the third terminal may overlap with the first resource in whole or in part.
The second side row control information may be carried in a second SCI, where a "time and frequency resource assignment (time domain and frequency domain resource indication)" field in the second SCI indicates a time-frequency location of the second resource, and a "priority" field in the second SCI indicates a value prioRX, and prioRX indicates a second priority of data to be sent by the third terminal.
It should be noted that, when the second resource is fully or partially overlapped with the first resource, if the second priority in the second SCI is higher than the first priority, this means that the overlapped resource in the first resource and the second resource may be preferentially used to transmit the data to be transmitted of the third terminal. That is, overlapping resources of the first resource and the second resource may be occupied by terminals other than the first terminal.
In addition, the first terminal may also receive the second sidestream control information sent by two or more third terminals, respectively. In other words, in the geographic location, there may be two or more third terminals located around the first terminal, and there may be third terminals that reserve second resources for side-link communication overlapping with the first resources, and there may be third terminals that reserve second resources for side-link communication not overlapping with the first resources.
In step 703, when the first resource overlaps with the second resource and the second priority is higher than the first priority, the first terminal sends resource indication information to the second terminal, where the resource indication information is used to indicate a third resource recommended by the first terminal for the second terminal.
The third resource determined by the first terminal may satisfy any one of the following situations:
In case one, the third resource includes the remaining resources of the first resource other than the second resource. The remaining resources may be all or part of the first resources except the second resources, and the third resources may have the same size as the data to be transmitted of the second terminal. Illustratively, as shown in (a) of fig. 8, the first resource reserved by the second terminal is resource 01, the second resource reserved by the third terminal is resource 02, and as can be seen from the figure, resource 02 partially overlaps with resource 01, and the first terminal determines that the third resource is all or part of resources except for the resources occupied by resource 02 in resource 01.
In the second case, the third resource includes resources other than the first resource and the second resource in the resource listening window of the first terminal, and the size of the third resource may be the same as the size of the data to be transmitted of the second terminal. Illustratively, as shown in (b) of fig. 8, the first resource reserved by the second terminal is resource 01, the second resource reserved by the third terminal is resource 02, and as can be seen from the figure, resource 02 partially overlaps with resource 01, the first terminal determines that the third resource is resource 03 in the resource listening window, and the resource 03 does not overlap with both resource 01 and resource 02.
In a possible embodiment, in a scenario in which the first terminal receives second sideline control information sent by two or more third terminals respectively, assuming that the second sideline control information of the other third terminals reserves a fourth resource for sideline communication of the other third terminals, the third resources include resources other than the first resource, the second resource and the fourth resource in a resource listening window of the first terminal. Illustratively, as shown in (c) of fig. 8, the second sideline control information of the other third terminals is that a fourth resource reserved for sidelink communication of the other third terminals is resource 04, the first resource reserved for the second terminal is resource 01, and the second resource reserved for the third terminal is resource 02, where it can be seen from the figure that resource 02 partially overlaps with resource 01, and the first terminal determines that the third resource is resource 03 in the resource listening window, where the resource 03 does not overlap with resource 01, resource 02 and resource 04.
In the third case, the third resource includes not only the remaining resources but also resources other than the first resource and the second resource in the resource listening window of the first terminal, and the size of the third resource may be the same as the size of the data to be transmitted of the second terminal. Illustratively, as shown in (d) of fig. 8, the first resource reserved by the second terminal is resource 01, the second resource reserved by the third terminal is resource 02, and as can be seen from the figure, resource 02 partially overlaps with resource 01, the first terminal determines that the third resource is resource 03 in the resource listening window, and the resource 03 includes not only a part of resources except for resource 02 but also resources except for resource 02 in the resource listening window.
In a possible embodiment, in a scenario in which the first terminal receives second sidelink control information sent by two or more third terminals respectively, assuming that the second sidelink control information of other third terminals reserves a fourth resource for sidelink communication of other third terminals, the third resource includes not only the remaining resources but also resources other than the first resource, the second resource and the fourth resource in the resource listening window of the first terminal. Illustratively, as shown in (e) of fig. 8, the second sideline control information of the other third terminals is that the fourth resource reserved for sidelink communication of the other third terminals is resource 04, the first resource reserved for the second terminal is resource 01, the second resource reserved for the third terminal is resource 02, it can be seen from the figure that resource 02 partially overlaps with resource 01, and the first terminal determines that the third resource is resource 03 in the resource listening window, and the resource 03 and the part of resources except for resource 02 are included in the resource listening window, and the resources except for resource 02 and resource 04 are also included in the resource listening window.
In this embodiment, the third resource recommended by the first terminal and meeting the above situation helps to reduce the possibility that the second terminal self-selected resource collides with other terminal resources, so as to help to improve the possibility that the second terminal uses the self-selected resource to successfully communicate.
In a possible implementation manner, after the second terminal receives the resource indication information, the resource selection may be completed based on the resource indication information, and the method may further include the following step 704.
Step 704, after receiving the resource indication information, the second terminal determines a transmission resource for transmitting data to be transmitted of the second terminal according to the first candidate resource and the third resource, and transmits the data to the first terminal on the transmission resource.
The first candidate resource is a resource detected by the second terminal, or the first candidate resource is a pre-configured resource, or the first candidate resource is a resource configured by the network device. Or the network device sends control information to the terminal device in advance, the control information configures a candidate resource pool, and the terminal device can determine a first candidate resource from the candidate resource pool according to the interception result. In another or alternative, the protocol predefines a candidate resource pool from which the terminal device may determine the first candidate resource based on the listening result.
The method for the second terminal to monitor the resource pool of the resource selection window to obtain the first candidate resource may refer to the related description about the flow of autonomous resource selection by the terminal in fig. 4A, and the detailed description is not repeated here.
In particular, for a specific manner in which the second terminal selects the transmission resource for the side-link communication with the first terminal from the first candidate resource and the third resource, there may be one or more of the following manners.
Mode one: the second terminal calculates a first ratio between the number of resources of the intersection of the third resource and the first candidate resource and the number of resources of the resource pool, compares the first ratio with a first threshold, and determines that the intersection of the third resource and the first candidate resource is a transmission resource when the first ratio is greater than or equal to the first threshold.
The sending resource is the intersection of the resource detected by the second terminal and the resource recommended by the first terminal, so that the second terminal is helped to avoid selecting the third resource from the resource pool and the resources except the intersection in the first candidate resource, the possibility that the resources selected by the second terminal autonomously collide with the resources of other terminals is further reduced, and the success rate of the second terminal for communication on the sending resource is helped to be improved.
Mode two: the second terminal calculates a first ratio between the number of resources of the intersection of the third resource and the first candidate resource and the number of resources of the resource pool, compares the first ratio with a first threshold, calculates a second ratio between the number of resources of the first candidate resource and the number of resources of the resource pool when the first ratio is smaller than the first threshold, compares the second ratio with the first threshold, and determines the first candidate resource as the transmission resource when the second ratio is greater than or equal to the first threshold. The method is beneficial to reducing the possibility that the second terminal selects the third resource from the resource pool and the resources except the intersection in the first candidate resource, reducing the possibility that the resources selected by the second terminal autonomously collide with the resources of other terminals, and improving the success rate of the second terminal for communication on the transmission resources.
In the method shown in fig. 7, for example, in conjunction with fig. 5, the receiving end UE1 (i.e. the first terminal above) receives the first SCI from the sending end UE1 (i.e. the second terminal above) (where the first resource in the first SCI is used to transmit the data to be transmitted of the sending end UE1, the first SCI carries prioRX to be 4), and in addition, the sending end UE2 near the receiving end UE1 sends the second SCI to the receiving end UE2 (where the second resource in the second SCI is used to transmit the data to be transmitted of the sending end UE2, the second SCI carries prioRX to be 3), and the receiving end UE1 may also receive the second SCI from the sending end UE2 (i.e. the third terminal above). Because the transmitting end UE1 is out of the transmission range of the transmitting end UE2, the transmitting end UE2 may consider the first resource as a candidate resource, and thus the second resource reserved by the transmitting end UE2 for the receiving end UE2 may overlap with the first resource in whole or in part. Since the larger the value prioRX is, the lower the priority of the data is, when the receiving end UE1 determines that the second resource may overlap with the first resource entirely or partially, the data to be transmitted of the transmitting end UE2 may occupy all or part of the first resource. Therefore, at this time, the receiving end UE1 determines the third resource according to the method shown in step 703, and sends the resource indication information for indicating the third resource to the sending end UE1, so that the sending end UE1 selects the sending resource according to the self-resource interception result and the resource indication information, and the sending end UE1 can reduce the probability that the resource autonomously selected by the sending end UE1 collides with the resource of other terminals (such as the sending end UE 2) under the condition of autonomously selecting the resource, thereby being beneficial to improving the possibility that the sending end UE1 uses the self-selected resource to successfully communicate.
In the embodiment of the application, on one hand, for the first terminal, the first terminal does not need to periodically report the resource indication information to the second terminal, but reports the resource indication information under the condition that the first resource and the second resource are overlapped and the second priority is higher than the first priority, thereby being beneficial to reducing signaling overhead and avoiding waste of transmission resources; on the other hand, for the second terminal, since the second terminal receives the resource indication information from the first terminal, when determining the transmission resource, not only the available resource detected by the second terminal but also the resource recommended by other terminals (such as the first terminal) can be considered, so that the second terminal is facilitated to reduce the probability of collision between the resource autonomously selected by the second terminal and the resource of other terminals under the condition of autonomously selecting the resource, and the second terminal is facilitated to improve the probability of successful communication by using the self-selected resource.
Fig. 9A is a schematic flow chart of a resource indication method and a resource selection method according to an embodiment of the present application, where the method is applicable to the following scenarios: the second terminal and the first terminal belong to the same communication group, the second terminal is a scheduling terminal, and the first terminal belongs to at least one scheduled terminal in the communication group. The method may specifically comprise the following steps.
In step 901, the second terminal sends first lateral control information to the first terminal. The first side control information is used for indicating a first resource reserved by the second terminal for side uplink communication, and the first side control information is also used for indicating a first priority of data to be sent by the second terminal.
In this step, the second terminal reserves the first resource for the side-link communication, and the first side-link control information may be carried in the SCI, and the field information in the SCI may refer to step 701 above, which is not repeated here.
In step 902, the third terminal sends second sidestream control information to the first terminal. The second sidestream control information is used for indicating a second resource reserved by the third terminal for sidestream link communication, and the second sidestream control information is also used for indicating a second priority of data to be sent by the third terminal.
Likewise, the detailed description of this step 902 may refer to the above step 702, and the detailed description is not repeated here.
In step 903, when the first resource overlaps with the second resource and the second priority is higher than the first priority, the first terminal sends resource indication information to the second terminal, where the resource indication information is used to indicate the second candidate resource recommended by the first terminal for the second terminal.
The situation that the third resource determined by the first terminal may be satisfied may be referred to above in step 703.
In step 904, the second terminal determines a first candidate resource.
The first candidate resource is a resource detected by the second terminal, or the first candidate resource is a pre-configured resource, or the first candidate resource is a resource configured by the network device. Or the network device sends control information to the terminal device in advance, the control information configures a candidate resource pool, and the terminal device can determine a first candidate resource from the candidate resource pool according to the interception result. In another or alternative, the protocol predefines a candidate resource pool from which the terminal device may determine the first candidate resource based on the listening result.
The method for the second terminal to monitor the resource pool of the resource selection window to obtain the first candidate resource may refer to the related description about the flow of autonomous resource selection by the terminal in fig. 4A, and the detailed description is not repeated here.
After receiving the resource indication information, the second terminal may complete the resource selection based on the resource indication information, where the first possible resource selection mode refers to step 905a, and the second possible resource selection mode participates in step 905b.
In step 905a, after the second terminal receives the at least two resource indication information, the second terminal determines a transmission resource from the first candidate resource and the at least two second candidate resources.
For example, in connection with fig. 9B, three first terminals in the scheduled terminal group each receive first side control information from the second terminal, and the other three first terminals also receive second side control information from the third terminal, and the three first terminals respectively perform RSRP measurement on the first resource and the second resource to obtain RSRP measurement results, and respectively determine second candidate resources based on the resource interception results, so that the three first terminals respectively report resource indication information to the first terminals, and the first terminals determine transmission resources from the first candidate resources and at least two second candidate resources based on the three second candidate resources and the first candidate resources indicated by the three resource indication information.
In particular, for the specific manner in which the second terminal selects the transmission resource for the side-uplink communication with the first terminal from the first candidate resource and the at least two second candidate resources, there may be one or more of the following manners.
Mode one: the second terminal calculates a first ratio between the number of resources of the intersection of the at least two second candidate resources and the first candidate resource and the number of resources of the resource pool, compares the first ratio with a first threshold, and determines that the intersection of the at least two second candidate resources and the first candidate resource is a transmission resource when the first ratio is greater than or equal to the first threshold.
The sending resource is the intersection of the resource detected by the second terminal and the resource recommended by the first terminal, so that the second terminal is helped to avoid selecting at least two second candidate resources from the resource pool and resources except the intersection in the first candidate resources, the possibility that the resources selected by the second terminal autonomously collide with the resources of other terminals is further reduced, and the success rate of the second terminal for communication on the sending resource is helped to be improved.
Mode two: the second terminal calculates a first ratio between the number of resources of the intersection of at least two second candidate resources and the first candidate resource and the number of resources of the resource pool, compares the first ratio with a first threshold, calculates a second ratio between the number of resources of the first candidate resource and the number of resources of the resource pool when the first ratio is smaller than the first threshold, compares the second ratio with the first threshold, and determines the first candidate resource as a transmission resource when the second ratio is larger than or equal to the first threshold. The method is beneficial to reducing the possibility that the second terminal selects the third resource from the resource pool and the resources except the intersection in the first candidate resource, reducing the possibility that the resources selected by the second terminal autonomously collide with the resources of other terminals, and improving the success rate of the second terminal for communication on the transmission resources.
In the embodiment of the application, the scheduling terminal determines the resources of the side uplink communication transmission according to the self-interception result and the recommended resources reported by two or more scheduled terminals, so that the probability of collision between the resources selected by the second terminal and other terminal resources is reduced under the condition of the second terminal selecting the resources independently, and the probability of successful communication by the first terminal using the transmission resources is improved.
In step 905b, the second terminal determines a candidate resource from the target second candidate resource indicated by the resource indication information received closest to the current time and the first candidate resource set.
For example, still referring to fig. 9B, three first terminals in the scheduled terminal group each receive first side control information from the second terminal, and the other three first terminals also receive second side control information from the third terminal, and the three first terminals respectively perform RSRP measurement on the first resource and the second resource to obtain RSRP measurement results, and respectively determine second candidate resources based on the resource interception results, so that the three first terminals respectively report resource indication information to the first terminals, and the first terminals determine transmission resources from the first candidate resources and the target second candidate resources based on the target second candidate resources and the first candidate resources indicated by the resource indication information received most recently from the current moment.
In the embodiment of the application, the target second candidate resource is the second candidate resource indicated by the resource indication information received closest to the current moment, so that the resources which are reserved and occupied are helped to be accurately removed, and the scheduling terminal determines the resources of the side-link communication transmission according to the self-interception result and the target second candidate resource, so that the probability of collision between the resources selected by the second terminal and other terminal resources is helped to be reduced under the condition that the second terminal autonomously selects the resources, and the probability of successful communication when the first terminal uses the transmission resources is helped to be improved.
Fig. 10 is a flowchart of a resource indication method according to an embodiment of the present application, where the method is applicable to the scenario shown in fig. 11: the second terminal, the third terminal and the first terminal belong to the same communication group, the second terminal is a scheduling terminal, and the first terminal and the third terminal belong to scheduled terminals in the communication group. The method may specifically comprise the following steps.
In step 1001, the first terminal determines data to be sent, where a destination terminal of the data to be sent is a third terminal.
In step 1002, the first terminal sends a resource request message to the second terminal, where the resource request message is used for requesting side uplink resources, and the resource request message includes resource indication information, where the resource indication information is used for indicating first side uplink resources recommended by the first terminal and used for sending data to be sent.
Wherein the resource request message may be an SCI, the resource indication information is carried in the SCI, and a "time and frequency resource assignment (time domain and frequency domain resource indication)" field in a first SCI of the SCIs indicates a time-frequency location of the first side-link resource.
In one possible embodiment, the size of the first side-link resource may be the same as the size of the data to be transmitted. The method is beneficial to the second terminal to accurately select enough resources to transmit the data to be transmitted, and the shortage of resources or the waste of resources are avoided.
After receiving the resource indication information, the second terminal may perform resource selection, where the first possible resource selection method refers to step 1003a; the second possible resource selection mode participates in step 1003b; a third possible resource selection manner participates in step 1003c.
In step 1003a, after receiving the resource indication information, the second terminal determines, according to the first side uplink resource and the second side uplink resource, a transmission resource for transmitting the data to be transmitted.
In particular, for a specific manner in which the second terminal selects the transmission resource for the side-link communication with the first terminal from the first candidate resource and the target second candidate resource, reference may be made to the first or second manner in step 704.
In this way, when determining the transmission resource, the second terminal considers not only the second side uplink resource that is detected by itself, but also the first side uplink resource that is recommended by other terminals (such as the first terminal), so that the second terminal is facilitated to reduce the probability of collision between the resource that is selected by the second terminal and the other terminal resources under the condition of selecting the resource autonomously, and thus the probability of successful communication by the first terminal using the transmission resource is facilitated to be improved.
In step 1003b, after receiving the resource indication information, the second terminal determines, according to the first side uplink resource, a transmission resource for transmitting the data to be transmitted.
Specifically, the second terminal may select all or part of the resources from the first side uplink resources as transmission resources, or the second terminal may select part of the resources from the first side uplink resources and select part of the candidate resources from the resource pool corresponding to the resource selection window as transmission resources.
In this manner, the first terminal selects to transmit data to the third terminal on the transmission resource in the recommended first side link resource, which helps to reduce the probability of collision of the first terminal with other terminal resources.
In step 1003c, after receiving the resource indication information, the second terminal determines, according to the second side uplink resource, a transmission resource for transmitting the data to be transmitted.
Specifically, the second terminal may select all or part of the resources from the second side uplink resources as transmission resources, or the second terminal may select part of the resources from the second side uplink resources and select part of the candidate resources from the resource pool corresponding to the resource selection window as transmission resources.
In the steps 1003a to 1003c, the second side uplink resource is a candidate resource obtained by interception by the second terminal, or a preconfigured resource, or a resource configured by the network device. And then, or the network equipment sends control information to the terminal equipment in advance, wherein the control information configures a candidate resource pool, and the terminal equipment can determine the second side uplink resource from the candidate resource pool according to the interception result. In a further or alternative, the protocol predefines a candidate resource pool from which the terminal device may determine the second side uplink resource based on the listening result. The method for the second terminal to monitor the resource pool of the resource selection window to obtain the second side uplink resource may refer to the related description about the flow of autonomous resource selection by the terminal in fig. 4A, and the detailed description is not repeated here.
In step 1004, the second terminal sends the indication information of the transmission resource to the first terminal.
In step 1005, the first terminal receives the instruction information of the transmission resource from the second terminal, and then transmits data to the third terminal on the transmission resource.
In the embodiment of the application, on one hand, for the first terminal, the first terminal does not need to periodically report the resource indication information to the second terminal, but reports the resource indication information when determining that data needs to be transmitted, thereby being beneficial to reducing signaling overhead and avoiding the waste of transmission resources; on the other hand, for the second terminal, since the second terminal receives the resource indication information from the first terminal, when determining the transmission resource, not only the available resource detected by the second terminal but also the resource recommended by other terminals (such as the first terminal) can be considered, so that the second terminal is facilitated to reduce the probability of collision between the resource autonomously selected by the second terminal and the resource of other terminals under the condition of autonomously selecting the resource, and the second terminal is facilitated to improve the probability of successful communication by using the self-selected resource.
The step numbers of the flowcharts described in the embodiments of the present application are only an example of the execution flow, and do not limit the execution sequence of the steps, and in the embodiments of the present application, there is no strict execution sequence between the steps that have no time sequence dependency relationship with each other.
In the embodiment provided by the application, the resource selection method provided by the embodiment of the application is introduced from the point of taking the terminal as an execution subject. In order to implement the functions in the resource selection method provided in the embodiment of the present application, the terminal 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.
As with the concept of the foregoing embodiments, the embodiment of the present application further provides a first communication apparatus 1200, where the first communication apparatus 1200 is configured to implement the function of the first terminal in the foregoing method. The first communication apparatus 1200 may be a first terminal or an apparatus in the first terminal, for example. The device may be a system-on-chip. In the embodiment of the application, the chip system can be formed by a chip, and can also comprise the chip and other discrete devices.
In an example, as shown in fig. 12A, the first communication apparatus 1200 includes a processing unit 1201 and a transceiving unit 1202.
For the method shown in fig. 7, the transceiver 1202 is configured to receive the first lateral control information from the second terminal; the first side-link control information is used for indicating first resources reserved by a second terminal for side-link communication and is used for indicating first priority of data to be sent of the second terminal.
The transceiver unit 1202 is further configured to receive second sidestream control information from a third terminal, where the second sidestream control information is configured to indicate a second resource reserved by the third terminal for sidestream communication, and is configured to indicate a second priority of data to be sent by the third terminal.
The transceiver 1202 is further configured to, when the first resource overlaps with the second resource and the second priority is higher than the first priority, send, by the first terminal, resource indication information to the second terminal, where the resource indication information is used to indicate a third resource recommended by the first terminal for the second terminal.
In some embodiments, the third resource includes a remaining resource other than the second resource in the first resource, and/or the third resource includes a resource other than the first resource and the second resource in a resource listening window of the first terminal, where the resource listening window is n slots before a time point of selection for the first terminal resource, and n is a positive integer.
In some embodiments, the size of the third resource is the same as the size of the data to be sent of the second terminal.
In one embodiment, the second terminal and the first terminal belong to the same communication group, the second terminal is a scheduling terminal, and the first terminal belongs to at least one scheduled terminal in the communication group.
In one embodiment, the second terminal and the first terminal belong to the same communication group, the second terminal is a scheduling terminal, the first terminal belongs to at least one scheduled terminal in the communication group, and the third terminal does not belong to the communication group.
Regarding the specific implementation and advantageous effects of the processing unit 1201 and the transceiver unit 1202, reference may be made to the description of the method related to fig. 7.
With respect to the method shown in fig. 10, the processing unit 1201 of the first communication apparatus is configured to determine that the destination terminal is data to be sent of the third terminal.
A transceiver unit 1202, configured to send a resource request message to a second terminal, where the resource request message is used for requesting a side uplink resource, and the resource request message includes resource indication information, where the resource indication information is used for indicating a first side uplink resource recommended by the first terminal and used for sending the data to be sent.
In some embodiments, the transceiver 1202 is further configured to receive, from the second terminal, indication information of a transmission resource, where the transmission resource is determined by the second terminal according to the first side uplink resource and a second side uplink resource, and the second side uplink resource is a candidate resource obtained by interception by the second terminal, or a preconfigured resource, or a resource configured by a network device; the transceiver 1202 is further configured to send data to the third terminal on the transmission resource.
In some embodiments, the transceiver unit 1202 is further configured to receive indication information of a transmission resource from the second terminal, where the transmission resource is determined by the second terminal according to the first side uplink resource;
The transceiver 1202 is further configured to send data to the third terminal on the transmission resource.
In some embodiments, the second terminal and the first terminal and the third terminal belong to the same communication group, the second terminal is a scheduling terminal, and the first terminal and the third terminal belong to at least two scheduled terminals in the communication group.
In some embodiments, the size of the first side uplink resource is the same as the size of the data to be sent.
Regarding the specific implementation and advantageous effects of the processing unit 1201 and the transceiver unit 1202, reference may be made to the description of the method related to fig. 10.
The embodiment of the present application further provides a second communication device 1300, where the second communication device 1300 is configured to implement the function of the second terminal in the above method. The second communication apparatus 1300 may be a second terminal or an apparatus in the second terminal, for example. The device may be a system-on-chip. In the embodiment of the application, the chip system can be formed by a chip, and can also comprise the chip and other discrete devices.
In an example, as shown in fig. 12B, the second communication apparatus 1300 includes a processing unit 1301 and a transmitting and receiving unit 1302.
For the method shown in fig. 9A, the processing unit 1301 of the second communication apparatus 1300 is configured to determine a first candidate resource, where the first candidate resource is obtained by interception by the second terminal, or is preconfigured, or is configured by a network device.
The transceiver 1302 is configured to receive at least two resource indication information from at least two first terminals, where the resource indication information is used to indicate a second candidate resource recommended by the first terminal for the second terminal.
Processing unit 1301 is further configured to determine a transmission resource from the first candidate resource and at least two of the second candidate resources;
The second terminal and the at least two first terminals belong to the same communication group, the second terminal is a scheduling terminal, and the at least two first terminals are scheduled terminals.
In some embodiments, the processing unit 1301 of the second communication apparatus 1300 is configured to determine a first candidate resource, where the first candidate resource is obtained by interception by the second terminal, or is preconfigured, or is configured by a network device.
The transceiver 1302 is configured to receive at least two resource indication information from at least two first terminals, where the resource indication information is used to indicate a second candidate resource recommended by the first terminal for the second terminal.
Processing unit 1301 is further configured to determine a transmission resource from the first candidate resource and the target second candidate resource;
the second terminal and the at least two first terminals belong to the same communication group, the second terminal is a scheduling terminal, the at least two first terminals are scheduled terminals, and the target second candidate resource is a second candidate resource indicated by resource indication information received nearest to the current moment.
Regarding the specific implementation and advantageous effects of the processing unit 1301 and the transceiver unit 1302, reference may be made to the description of the method related to fig. 9A.
The division of the modules in the embodiments of the present application is schematically only one logic function division, and there may be another division manner in actual implementation, and in addition, each functional module in each embodiment of the present application may be integrated in one processor, or may exist separately and 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.
In yet another example, as shown in fig. 12B, the first communication device 1200 or the second communication device 1300 includes at least one processor 1210 and a memory 1220. Wherein the memory 1220 stores a computer program therein. Memory 1220 is coupled to processor 1210. The coupling in the embodiments of the present application is a spaced coupling or communication connection between devices, units or modules, and may be in electrical, mechanical or other forms for information interaction between devices, units or modules. As another implementation, the memory 1220 may also be located outside the first communication device 1200 or the second communication device 1300. Processor 1210 may operate in conjunction with memory 1220. Processor 1210 may invoke computer programs stored in memory 1220. At least one of the at least one memory may be included in the processor.
In some embodiments, the first communication apparatus 1200 or the second communication apparatus 1300 may further include a communication interface 1230 for communicating with other devices over a transmission medium, such that the apparatus used in the first communication apparatus 1200 or the second communication apparatus 1300 may communicate with other devices. By way of example, communication interface 1230 may be a transceiver, circuit, bus, module, or other type of communication interface, which may be other terminals. Processor 1210 receives and transmits information using communication interface 1230 and is used to implement the methods of the above-described embodiments. Illustratively, the communication interface 1230 is configured to receive resource indication information. Also exemplary, communication interface 1230 is used to transmit data.
In the embodiment of the present application, the processor may be a general purpose processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array or other programmable logic device, a discrete gate or transistor logic device, or a discrete hardware component, and may implement or execute the methods, steps and logic blocks disclosed in the embodiments of the present application. The general purpose processor may be a microprocessor or any conventional processor or the like. The steps of a method disclosed in connection with the embodiments of the present application may be embodied directly in a hardware processor for execution, or in a combination of hardware and software modules in the processor for execution.
In the embodiment of the present application, the memory may be a nonvolatile memory, such as a hard disk (HARD DISK DRIVE, HDD) or a solid-state disk (SSD), or may be a volatile memory (RAM). The memory is any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer, but is not limited to such. The memory in the embodiments of the present application may also be a circuit or any other device capable of implementing a storage function, for storing a computer program and/or data.
The method provided by the embodiment of the application can be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented in software, may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program is loaded and executed on a computer, the flow or functions according to the embodiments of the present application are fully or partially produced. The computer may be a general purpose computer, a special purpose computer, a computer network, a network device, a user device, or other programmable apparatus. The computer instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be transmitted from one website, computer, server, or data center to another website, computer, server, or data center by a wired (e.g., coaxial cable, fiber optic, digital subscriber line (digital subscriber line, DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) means. The computer readable storage medium may be any medium that can be accessed by a computer or a data storage device including one or more media integrated servers, data centers, and the like. The medium may be a magnetic medium (e.g., a floppy disk, a hard disk, a magnetic tape), an optical medium (e.g., a digital video disc (digital video disc, abbreviated as DVD)), or a semiconductor medium (e.g., an SSD), etc.
It will be apparent to those skilled in the art that various modifications and variations can be made to the present application without departing from the scope of the application. Thus, it is intended that the present application also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.

Claims (25)

1.一种资源指示方法，其特征在于，包括：1. A resource indication method, comprising: 第一终端接收来自第二终端的第一侧行控制信息，所述第一侧行控制信息用于指示所述第二终端为侧行链路通信预约的第一资源，以及用于指示所述第二终端的待发送数据的第一优先级；The first terminal receives first sidelink control information from the second terminal, where the first sidelink control information is used to indicate a first resource reserved by the second terminal for sidelink communication and a first priority of data to be sent by the second terminal; 所述第一终端接收来自第三终端的第二侧行控制信息，其中，所述第二侧行控制信息用于指示所述第三终端为侧行链路通信预约的第二资源，以及用于指示所述第三终端的待发送数据的第二优先级，所述第三终端为位于所述第一终端附近的终端，所述第二终端位于所述第三终端的传输范围外；The first terminal receives second sidelink control information from a third terminal, wherein the second sidelink control information is used to indicate a second resource reserved by the third terminal for sidelink communication and a second priority of data to be sent by the third terminal, the third terminal is a terminal located near the first terminal, and the second terminal is located outside the transmission range of the third terminal; 在所述第一资源与所述第二资源有重叠且所述第二优先级高于所述第一优先级的情况下，所述第一终端向所述第二终端发送资源指示信息，所述资源指示信息用于指示所述第一终端为所述第二终端推荐的第三资源。In a case where the first resource overlaps with the second resource and the second priority is higher than the first priority, the first terminal sends resource indication information to the second terminal, where the resource indication information is used to indicate a third resource recommended by the first terminal to the second terminal. 2.根据权利要求1所述的方法，其特征在于，所述第三资源包括所述第一资源中除所述第二资源之外的剩余资源，和/或，所述第三资源包括所述第一终端的资源侦听窗口中除所述第一资源和所述第二资源之外的资源，所述资源侦听窗口为所述第一终端资源选择时间点之前的n个时隙，n为正整数。2. The method according to claim 1 is characterized in that the third resource includes the remaining resources in the first resource except the second resource, and/or the third resource includes the resources in the resource listening window of the first terminal except the first resource and the second resource, and the resource listening window is n time slots before the resource selection time point of the first terminal, and n is a positive integer. 3.根据权利要求1或2所述的方法，其特征在于，所述第三资源的大小与所述第二终端的待发送数据的大小相同。3 . The method according to claim 1 , wherein the size of the third resource is the same as the size of the data to be sent by the second terminal. 4.根据权利要求1或2所述的方法，其特征在于，所述第二终端和所述第一终端属于同一个通信组，所述第二终端为调度终端，所述第一终端属于所述通信组中的至少一个被调度终端。4. The method according to claim 1 or 2 is characterized in that the second terminal and the first terminal belong to the same communication group, the second terminal is a scheduling terminal, and the first terminal belongs to at least one scheduled terminal in the communication group. 5.根据权利要求4所述的方法，其特征在于，所述第三终端不属于所述通信组。The method according to claim 4 , wherein the third terminal does not belong to the communication group. 6.一种资源指示方法，其特征在于，包括：6. A resource indication method, characterized by comprising: 第一终端确定待发送数据，所述待发送数据的目的端为第三终端；The first terminal determines data to be sent, where the destination of the data to be sent is a third terminal; 所述第一终端向第二终端发送资源请求消息，所述资源请求消息用于请求侧行链路资源，且所述资源请求消息包括资源指示信息，所述资源指示信息用于指示所述第一终端推荐的用于发送所述待发送数据的第一侧行链路资源；The first terminal sends a resource request message to the second terminal, where the resource request message is used to request a sidelink resource, and the resource request message includes resource indication information, where the resource indication information is used to indicate a first sidelink resource recommended by the first terminal for sending the data to be sent; 其中，所述第二终端、所述第一终端和所述第三终端属于同一个通信组，所述第二终端为调度终端，所述第一终端和所述第三终端属于所述通信组中的至少两个被调度终端。The second terminal, the first terminal and the third terminal belong to the same communication group, the second terminal is a scheduling terminal, and the first terminal and the third terminal belong to at least two scheduled terminals in the communication group. 7.根据权利要求6所述的方法，其特征在于，包括：7. The method according to claim 6, characterized in that it comprises: 所述第一终端接收来自所述第二终端的发送资源的指示信息，所述发送资源是所述第二终端根据所述第一侧行链路资源和第二侧行链路资源确定的，所述第二侧行链路资源为所述第二终端通过侦听得到的候选资源，或预配置的资源，或网络设备配置的资源；The first terminal receives indication information of a sending resource from the second terminal, where the sending resource is determined by the second terminal according to the first sidelink resource and the second sidelink resource, and the second sidelink resource is a candidate resource obtained by the second terminal through listening, or a preconfigured resource, or a resource configured by a network device; 所述第一终端在所述发送资源上向所述第三终端发送数据。The first terminal sends data to the third terminal on the sending resource. 8.根据权利要求6所述的方法，其特征在于，包括：8. The method according to claim 6, characterized in that it comprises: 所述第一终端接收来自所述第二终端的发送资源的指示信息，所述发送资源是所述第二终端根据所述第一侧行链路资源确定的；The first terminal receives indication information of a transmission resource from the second terminal, where the transmission resource is determined by the second terminal according to the first sidelink resource; 所述第一终端在所述发送资源上向所述第三终端发送数据。The first terminal sends data to the third terminal on the sending resource. 9.根据权利要求6至8任一项所述的方法，其特征在于，所述第一侧行链路资源的大小与所述待发送数据的大小相同。9. The method according to any one of claims 6 to 8, characterized in that the size of the first sidelink resource is the same as the size of the data to be sent. 10.一种资源选择方法，其特征在于，所述方法包括：10. A resource selection method, characterized in that the method comprises: 第二终端确定第一候选资源，所述第一候选资源为所述第二终端通过侦听得到的，或预配置的，或网络设备配置的；The second terminal determines a first candidate resource, where the first candidate resource is obtained by the second terminal through listening, or is preconfigured, or is configured by a network device; 所述第二终端接收分别来自至少两个第一终端的至少两个资源指示信息，所述资源指示信息用于指示所述第一终端为所述第二终端推荐的第二候选资源，所述资源指示信息是所述第一终端在所述第二终端为侧行链路通信预约的第一资源与第三终端为侧行链路通信预约的第二资源有重叠且所述第三终端的待发送数据的第二优先级高于所述第二终端的待发送数据的第一优先级的情况下确定的，所述第一资源和所述第一优先级是所述第二终端向所述第一终端发送的第一侧行控制信息指示的，所述第二资源和所述第二优先级是所述第三终端向所述第一终端发送的第二侧行控制信息指示的；The second terminal receives at least two resource indication information respectively from at least two first terminals, the resource indication information being used to indicate a second candidate resource recommended by the first terminal to the second terminal, the resource indication information being determined by the first terminal when a first resource reserved by the second terminal for sidelink communication overlaps with a second resource reserved by a third terminal for sidelink communication and a second priority of data to be sent by the third terminal is higher than a first priority of data to be sent by the second terminal, the first resource and the first priority are indicated by first sidelink control information sent by the second terminal to the first terminal, and the second resource and the second priority are indicated by second sidelink control information sent by the third terminal to the first terminal; 所述第二终端从所述第一候选资源和至少两个所述第二候选资源中确定发送资源；The second terminal determines a sending resource from the first candidate resource and at least two of the second candidate resources; 其中，所述第二终端和所述至少两个第一终端属于同一个通信组，所述第二终端为调度终端，所述至少两个第一终端为被调度终端。The second terminal and the at least two first terminals belong to the same communication group, the second terminal is a scheduling terminal, and the at least two first terminals are scheduled terminals. 11.一种资源选择方法，其特征在于，所述方法包括：11. A resource selection method, characterized in that the method comprises: 第二终端确定第一候选资源，所述第一候选资源为所述第二终端通过侦听得到的，或预配置的，或网络设备配置的；The second terminal determines a first candidate resource, where the first candidate resource is obtained by the second terminal through listening, or is preconfigured, or is configured by a network device; 所述第二终端接收分别来自至少两个第一终端的至少两个资源指示信息，所述资源指示信息用于指示所述第一终端为所述第二终端推荐的第二候选资源，所述资源指示信息是所述第一终端在所述第二终端为侧行链路通信预约的第一资源与第三终端为侧行链路通信预约的第二资源有重叠且所述第三终端的待发送数据的第二优先级高于所述第二终端的待发送数据的第一优先级的情况下确定的，所述第一资源和所述第一优先级是所述第二终端向所述第一终端发送的第一侧行控制信息指示的，所述第二资源和所述第二优先级是所述第三终端向所述第一终端发送的第二侧行控制信息指示的；The second terminal receives at least two resource indication information respectively from at least two first terminals, the resource indication information being used to indicate a second candidate resource recommended by the first terminal to the second terminal, the resource indication information being determined by the first terminal when a first resource reserved by the second terminal for sidelink communication overlaps with a second resource reserved by a third terminal for sidelink communication and a second priority of data to be sent by the third terminal is higher than a first priority of data to be sent by the second terminal, the first resource and the first priority are indicated by first sidelink control information sent by the second terminal to the first terminal, and the second resource and the second priority are indicated by second sidelink control information sent by the third terminal to the first terminal; 所述第二终端从所述第一候选资源和目标第二候选资源中确定发送资源；The second terminal determines a sending resource from the first candidate resource and a target second candidate resource; 其中，所述第二终端和所述至少两个第一终端属于同一个通信组，所述第二终端为调度终端，所述至少两个第一终端为被调度终端，所述目标第二候选资源为距离当前时刻最近接收的资源指示信息所指示的第二候选资源。The second terminal and the at least two first terminals belong to the same communication group, the second terminal is a scheduling terminal, the at least two first terminals are scheduled terminals, and the target second candidate resource is the second candidate resource indicated by the resource indication information received closest to the current moment. 12.一种通信装置，其特征在于，包括：收发单元和处理单元；12. A communication device, comprising: a transceiver unit and a processing unit; 所述收发单元，用于接收来自第二终端的第一侧行控制信息；所述第一侧行控制信息用于指示所述第二终端为侧行链路通信预约的第一资源，以及用于指示所述第二终端的待发送数据的第一优先级；The transceiver unit is used to receive first sidelink control information from a second terminal; the first sidelink control information is used to indicate a first resource reserved by the second terminal for sidelink communication, and is used to indicate a first priority of data to be sent by the second terminal; 所述收发单元，还用于接收来自第三终端的第二侧行控制信息，其中，所述第二侧行控制信息用于指示所述第三终端为侧行链路通信预约的第二资源，以及用于指示所述第三终端的待发送数据的第二优先级，所述第三终端为位于第一终端附近的终端，所述第二终端位于所述第三终端的传输范围外；The transceiver unit is further configured to receive second sidelink control information from a third terminal, wherein the second sidelink control information is used to indicate a second resource reserved by the third terminal for sidelink communication, and is used to indicate a second priority of data to be sent by the third terminal, the third terminal is a terminal located near the first terminal, and the second terminal is located outside the transmission range of the third terminal; 在所述处理单元确定所述第一资源与所述第二资源有重叠且所述第二优先级高于所述第一优先级的情况下，所述收发单元，还用于向所述第二终端发送资源指示信息，所述资源指示信息用于指示第一终端为所述第二终端推荐的第三资源。When the processing unit determines that the first resource overlaps with the second resource and the second priority is higher than the first priority, the transceiver unit is also used to send resource indication information to the second terminal, and the resource indication information is used to indicate the third resource recommended by the first terminal to the second terminal. 13.根据权利要求12所述的通信装置，其特征在于，所述第三资源包括所述第一资源中除所述第二资源之外的剩余资源，和/或，所述第三资源包括所述第一终端的资源侦听窗口中除所述第一资源和所述第二资源之外的资源，所述资源侦听窗口为所述第一终端资源选择时间点之前的n个时隙，n为正整数。13. The communication device according to claim 12 is characterized in that the third resource includes the remaining resources in the first resource except the second resource, and/or the third resource includes the resources in the resource listening window of the first terminal except the first resource and the second resource, and the resource listening window is n time slots before the resource selection time point of the first terminal, and n is a positive integer. 14.根据权利要求12或13所述的通信装置，其特征在于，所述第三资源的大小与所述第二终端的待发送数据的大小相同。14 . The communication device according to claim 12 , wherein the size of the third resource is the same as the size of the data to be sent by the second terminal. 15.根据权利要求12或13所述的通信装置，其特征在于，所述第二终端和所述第一终端属于同一个通信组，所述第二终端为调度终端，所述第一终端属于所述通信组中的至少一个被调度终端。15. The communication device according to claim 12 or 13, characterized in that the second terminal and the first terminal belong to the same communication group, the second terminal is a scheduling terminal, and the first terminal belongs to at least one scheduled terminal in the communication group. 16.根据权利要求15所述的通信装置，其特征在于，所述第三终端不属于所述通信组。The communication device according to claim 15 , wherein the third terminal does not belong to the communication group. 17.一种通信装置，其特征在于，包括：收发单元和处理单元；17. A communication device, comprising: a transceiver unit and a processing unit; 所述处理单元，用于确定待发送数据，所述待发送数据的目的端为第三终端；The processing unit is used to determine the data to be sent, where the destination of the data to be sent is a third terminal; 所述收发单元，用于向第二终端发送资源请求消息，所述资源请求消息用于请求侧行链路资源，且所述资源请求消息包括资源指示信息，所述资源指示信息用于指示第一终端推荐的用于发送所述待发送数据的第一侧行链路资源；The transceiver unit is used to send a resource request message to the second terminal, where the resource request message is used to request a sidelink resource, and the resource request message includes resource indication information, where the resource indication information is used to indicate a first sidelink resource recommended by the first terminal for sending the data to be sent; 其中，所述第二终端、所述第一终端和所述第三终端属于同一个通信组，所述第二终端为调度终端，所述第一终端和所述第三终端属于所述通信组中的至少两个被调度终端。The second terminal, the first terminal and the third terminal belong to the same communication group, the second terminal is a scheduling terminal, and the first terminal and the third terminal belong to at least two scheduled terminals in the communication group. 18.根据权利要求17所述的通信装置，其特征在于，18. The communication device according to claim 17, characterized in that: 所述收发单元，还用于接收来自所述第二终端的发送资源的指示信息，所述发送资源是所述第二终端根据所述第一侧行链路资源和第二侧行链路资源确定的，所述第二侧行链路资源为所述第二终端通过侦听得到的候选资源，或预配置的资源，或网络设备配置的资源；The transceiver unit is further configured to receive indication information of a sending resource from the second terminal, where the sending resource is determined by the second terminal according to the first sidelink resource and the second sidelink resource, and the second sidelink resource is a candidate resource obtained by the second terminal through listening, or a preconfigured resource, or a resource configured by a network device; 所述收发单元，还用于在所述发送资源上向所述第三终端发送数据。The transceiver unit is further configured to send data to the third terminal on the sending resource. 19.根据权利要求17所述的通信装置，其特征在于，19. The communication device according to claim 17, characterized in that: 所述收发单元，还用于接收来自所述第二终端的发送资源的指示信息，所述发送资源是所述第二终端根据所述第一侧行链路资源确定的；The transceiver unit is further configured to receive indication information of a sending resource from the second terminal, where the sending resource is determined by the second terminal according to the first sidelink resource; 所述收发单元，还用于在所述发送资源上向所述第三终端发送数据。The transceiver unit is further configured to send data to the third terminal on the sending resource. 20.根据权利要求17至19任一项所述的通信装置，其特征在于，所述第一侧行链路资源的大小与所述待发送数据的大小相同。20. The communication device according to any one of claims 17 to 19, characterized in that the size of the first sidelink resource is the same as the size of the data to be sent. 21.一种通信装置，其特征在于，包括处理单元和收发单元：21. A communication device, comprising a processing unit and a transceiver unit: 所述处理单元，用于确定第一候选资源，所述第一候选资源为第二终端通过侦听得到的，或预配置的，或网络设备配置的；The processing unit is used to determine a first candidate resource, where the first candidate resource is obtained by the second terminal through listening, or is pre-configured, or is configured by a network device; 所述收发单元，用于接收分别来自至少两个第一终端的至少两个资源指示信息，所述资源指示信息用于指示所述第一终端为所述第二终端推荐的第二候选资源，所述资源指示信息是所述第一终端在所述第二终端为侧行链路通信预约的第一资源与第三终端为侧行链路通信预约的第二资源有重叠且所述第三终端的待发送数据的第二优先级高于所述第二终端的待发送数据的第一优先级的情况下确定的，所述第一资源和所述第一优先级是所述第二终端向所述第一终端发送的第一侧行控制信息指示的，所述第二资源和所述第二优先级是所述第三终端向所述第一终端发送的第二侧行控制信息指示的；The transceiver unit is configured to receive at least two resource indication information respectively from at least two first terminals, the resource indication information being used to indicate a second candidate resource recommended by the first terminal to the second terminal, the resource indication information being determined by the first terminal when a first resource reserved by the second terminal for sidelink communication overlaps with a second resource reserved by a third terminal for sidelink communication and a second priority of data to be sent by the third terminal is higher than a first priority of data to be sent by the second terminal, the first resource and the first priority being indicated by first sidelink control information sent by the second terminal to the first terminal, and the second resource and the second priority being indicated by second sidelink control information sent by the third terminal to the first terminal; 所述处理单元，用于从所述第一候选资源和至少两个所述第二候选资源中确定发送资源；The processing unit is configured to determine a sending resource from the first candidate resource and at least two of the second candidate resources; 其中，所述第二终端和所述至少两个第一终端属于同一个通信组，所述第二终端为调度终端，所述至少两个第一终端为被调度终端。The second terminal and the at least two first terminals belong to the same communication group, the second terminal is a scheduling terminal, and the at least two first terminals are scheduled terminals. 22.一种通信装置，其特征在于，包括处理单元和收发单元：22. A communication device, comprising a processing unit and a transceiver unit: 所述处理单元，用于确定第一候选资源，所述第一候选资源为第二终端通过侦听得到的，或预配置的，或网络设备配置的；The processing unit is used to determine a first candidate resource, where the first candidate resource is obtained by the second terminal through listening, or is pre-configured, or is configured by a network device; 所述收发单元，用于接收分别来自至少两个第一终端的至少两个资源指示信息，所述资源指示信息用于指示所述第一终端为所述第二终端推荐的第二候选资源，所述资源指示信息是所述第一终端在所述第二终端为侧行链路通信预约的第一资源与第三终端为侧行链路通信预约的第二资源有重叠且所述第三终端的待发送数据的第二优先级高于所述第二终端的待发送数据的第一优先级的情况下确定的，所述第一资源和所述第一优先级是所述第二终端向所述第一终端发送的第一侧行控制信息指示的，所述第二资源和所述第二优先级是所述第三终端向所述第一终端发送的第二侧行控制信息指示的；The transceiver unit is configured to receive at least two resource indication information respectively from at least two first terminals, the resource indication information being used to indicate a second candidate resource recommended by the first terminal to the second terminal, the resource indication information being determined by the first terminal when a first resource reserved by the second terminal for sidelink communication overlaps with a second resource reserved by a third terminal for sidelink communication and a second priority of data to be sent by the third terminal is higher than a first priority of data to be sent by the second terminal, the first resource and the first priority being indicated by first sidelink control information sent by the second terminal to the first terminal, and the second resource and the second priority being indicated by second sidelink control information sent by the third terminal to the first terminal; 所述处理单元，用于从所述第一候选资源和目标第二候选资源中确定发送资源；The processing unit is used to determine a sending resource from the first candidate resource and a target second candidate resource; 其中，所述第二终端和所述至少两个第一终端属于同一个通信组，所述第二终端为调度终端，所述至少两个第一终端为被调度终端，所述目标第二候选资源为距离当前时刻最近接收的资源指示信息所指示的第二候选资源。The second terminal and the at least two first terminals belong to the same communication group, the second terminal is a scheduling terminal, the at least two first terminals are scheduled terminals, and the target second candidate resource is the second candidate resource indicated by the resource indication information received closest to the current moment. 23.一种通信装置，其特征在于，包括至少一个处理器，所述至少一个处理器与存储器相连，所述至少一个处理器用于读取并执行所述存储器中存储的程序，以使得所述装置执行如权利要求1-5，或6-9任一项所述的方法。23. A communication device, characterized in that it comprises at least one processor, wherein the at least one processor is connected to a memory, and the at least one processor is used to read and execute a program stored in the memory so that the device executes the method according to any one of claims 1-5, or 6-9. 24.一种通信装置，其特征在于，包括至少一个处理器，所述至少一个处理器与存储器相连，所述至少一个处理器用于读取并执行所述存储器中存储的程序，以使得所述装置执行如权利要求10或11所述的方法。24. A communication device, characterized in that it comprises at least one processor, wherein the at least one processor is connected to a memory, and the at least one processor is used to read and execute a program stored in the memory, so that the device executes the method according to claim 10 or 11. 25.一种计算机可读存储介质，其特征在于，所述计算机可读存储介质存储有计算机指令，当所述指令在计算机上运行时，使得计算机执行如权利要求1-11任一所述的方法。25. A computer-readable storage medium, characterized in that the computer-readable storage medium stores computer instructions, and when the instructions are executed on a computer, the computer executes the method according to any one of claims 1 to 11.
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