WO2024067423A1 - 通信方法和通信装置 - Google Patents

通信方法和通信装置 Download PDF

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Publication number
WO2024067423A1
WO2024067423A1 PCT/CN2023/120865 CN2023120865W WO2024067423A1 WO 2024067423 A1 WO2024067423 A1 WO 2024067423A1 CN 2023120865 W CN2023120865 W CN 2023120865W WO 2024067423 A1 WO2024067423 A1 WO 2024067423A1
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WO
WIPO (PCT)
Prior art keywords
carrier
cbr
terminal device
list
measurement result
Prior art date
Application number
PCT/CN2023/120865
Other languages
English (en)
French (fr)
Inventor
吴昊
彭文杰
Original Assignee
华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to EP23870654.3A priority Critical patent/EP4572475A1/en
Publication of WO2024067423A1 publication Critical patent/WO2024067423A1/zh

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria
    • H04W72/542—Allocation or scheduling criteria for wireless resources based on quality criteria using measured or perceived quality
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/08—Testing, supervising or monitoring using real traffic
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0453—Resources in frequency domain, e.g. a carrier in FDMA
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/25—Control channels or signalling for resource management between terminals via a wireless link, e.g. sidelink

Definitions

  • the present application relates to the field of communication technology, and in particular to a communication method and a communication device.
  • the vehicle to everything (V2X) system supports multi-carrier transmission.
  • the transmitter needs to select candidate carriers first, and then select a suitable carrier from the candidate carriers for transmission.
  • the transmitter first measures the channel busy ratio (CBR) of the carriers in the list of available carriers determined according to the service to be transmitted, and selects the carriers in the list of available carriers whose CBR is lower than the corresponding CBR threshold as candidate carriers, and then selects the carrier to transmit the service to be transmitted according to the CBR of the candidate carrier.
  • CBR channel busy ratio
  • sidelink (SL) transmission includes not only broadcast services but also unicast and multicast services, where unicast and multicast services need to ensure the communication quality of the other end. If the candidate carrier selected by the transmitter is not suitable for the receiver, it may cause reception failure at the receiver.
  • the present application provides a communication method and a communication device, which selects a candidate carrier by combining the measurement results of the CBR of the carrier by two terminal devices based on side link communication, which is conducive to ensuring normal side link communication.
  • a switching method is provided, which can be executed by a first terminal device, or by a component of the first terminal device (such as a processor, a chip, or a chip system, etc.), or by a logic module or software that can implement all or part of the functions of the first terminal device.
  • the first terminal device is the sender of the data.
  • the method includes: receiving a first measurement result from a second terminal device, and determining a candidate carrier according to the first measurement result and the second measurement result.
  • the first measurement result includes the channel busy ratio (CBR) of each carrier in the first carrier list measured by the second terminal device
  • the second measurement result includes the CBR of each carrier in the first carrier list measured by the first terminal device.
  • the first measurement result includes a second carrier list
  • the second carrier list is composed of at least one first carrier in the first carrier list
  • the CBR of the first carrier measured by the second terminal device is lower than the corresponding CBR threshold.
  • the second measurement result includes the CBR of each carrier in the second carrier list measured by the first terminal device.
  • the candidate carrier is used to send data through the side link between the first terminal device and the second terminal device.
  • the second terminal device can measure the CBR of the carrier and then feed back the measurement result to the first terminal device.
  • the first terminal device can select a candidate carrier based on the measurement results of the CBR of the carrier by itself and the second terminal device. In this way, it is possible to ensure that the selected candidate carrier is applicable to both the first terminal device and the second terminal device as much as possible, thereby facilitating normal sidelink communication.
  • the method before receiving the first measurement result from the second terminal device, the method further includes: determining a first carrier list; and sending the first carrier list to the second terminal device.
  • the first carrier list is a carrier list configured by an upper layer of the first terminal device, a carrier list supported by the network, a carrier list supported by the first terminal device, or an intersection of any two or three of the foregoing.
  • the first carrier list is a carrier list supported by both the first terminal device and the second terminal device; and before receiving the first measurement result from the second terminal device, the method also includes: sending a configuration message to the second terminal device, the configuration message including the first carrier list and a feedback cycle, the configuration message being used for the second terminal device to periodically feed back the CBR of each carrier in the first carrier list according to the feedback cycle; wherein, receiving the first measurement result from the second terminal device includes: receiving the first measurement result fed back by the second terminal device according to the feedback cycle.
  • the first carrier list is a carrier list configured by an upper layer of the second terminal device, a carrier list supported by the network, a carrier list supported by the second terminal device, or an intersection of any two or three of the foregoing.
  • the first measurement result includes the CBR of each carrier in the first carrier list measured by the second terminal device.
  • determining the candidate carrier according to the first measurement result and the second measurement result includes: for any carrier in the first carrier list, if the carrier meets the first condition, determining the carrier as a candidate carrier; or, if there is no sidelink authorization on all carriers in the first carrier list, for any carrier in the first carrier list, if the carrier meets the first condition, determining the carrier as a candidate carrier; or, if there is a sidelink authorization on some or all carriers in the first carrier list, for any carrier in the first carrier list that triggers carrier selection, if the carrier meets the second condition, determining the carrier as a candidate carrier, and for any carrier in the first carrier list that does not trigger carrier selection, if the carrier meets the first condition, determining the carrier as a candidate carrier.
  • the first condition is that the CBR of the carrier measured by the first terminal device is lower than the first CBR carrier selection threshold corresponding to the carrier, and the CBR of the carrier measured by the second terminal device is lower than the second CBR carrier selection threshold corresponding to the carrier, or the first condition is that the average of the CBR of the carrier measured by the first terminal device and the CBR of the carrier measured by the second terminal device is lower than the first CBR carrier selection threshold corresponding to the carrier or the second CBR carrier selection threshold corresponding to the carrier.
  • the second condition is that the CBR of the carrier measured by the first terminal device is lower than the first CBR carrier retention threshold corresponding to the carrier, and the CBR of the carrier measured by the second terminal device is lower than the second CBR carrier retention threshold corresponding to the carrier, or the second condition is that the CBR of the carrier measured by the first terminal device and the average of the CBR of the carrier measured by the second terminal device are lower than the first CBR carrier retention threshold corresponding to the carrier or the second CBR carrier retention threshold corresponding to the carrier.
  • the first measurement result includes a second carrier list.
  • determining a candidate carrier includes: for any carrier in the second carrier list, if the carrier satisfies the first condition, determining the carrier as a candidate carrier; or, if there is no sidelink authorization on all carriers in the second carrier list, for any carrier in the second carrier list, if the carrier satisfies the first condition, determining the carrier as a candidate carrier; or, if there is a sidelink authorization on some or all carriers in the second carrier list, for any carrier in the second carrier list that triggers carrier selection, if the carrier satisfies the second condition, determining the carrier as a candidate carrier, and for any carrier in the second carrier list that does not trigger carrier selection, if the carrier satisfies the first condition, determining the carrier as a candidate carrier.
  • the CBR measurement results of the candidate carrier selected by the first terminal device on the first terminal device side and the second terminal device side are lower than the corresponding CBR carrier selection/retention threshold, which can ensure that the candidate carrier is suitable for both the first terminal device and the second terminal device, thereby ensuring normal side link communication.
  • the first measurement result further includes a CBR of each carrier in the second carrier list.
  • determining a candidate carrier according to the first measurement result and the second measurement result includes: for any carrier in the second carrier list, if the carrier satisfies the first condition, determining the carrier as a candidate carrier; or, if there is no sidelink authorization on all carriers in the second carrier list, for any carrier in the second carrier list, if the carrier satisfies the first condition, determining the carrier as a candidate carrier; or, if there is a sidelink authorization on some or all carriers in the second carrier list, for any carrier in the second carrier list that triggers carrier selection, if the carrier satisfies the second condition, determining the carrier as a candidate carrier, and for any carrier in the second carrier list that does not trigger carrier selection, if the carrier satisfies the first condition, determining the carrier as a candidate carrier.
  • the first condition is that the average of the CBR of the carrier measured by the first terminal device and the CBR of the carrier measured by the second terminal device is lower than the first CBR carrier selection threshold corresponding to the carrier or the second CBR carrier selection threshold corresponding to the carrier.
  • the second condition is that the average of the CBR of the carrier measured by the first terminal device and the CBR of the carrier measured by the second terminal device is lower than the first CBR carrier retention threshold corresponding to the carrier or the second CBR carrier retention threshold corresponding to the carrier.
  • the side link device is also applicable to the second terminal device, thereby ensuring normal side link communication.
  • the first measurement result further includes a second CBR carrier selection threshold and/or a second CBR carrier retention threshold.
  • the method before receiving the first measurement result from the second terminal device, the method also includes: sending the priority of the data or the priority of the logical channel corresponding to the data to the second terminal device, and the priority of the data or the priority of the logical channel corresponding to the data is used by the second terminal device to determine the second CBR carrier selection threshold and/or the second CBR carrier retention threshold.
  • the method before receiving the first measurement result from the second terminal device, the method further includes: sending a second CBR carrier selection threshold and/or a second CBR carrier retention threshold to the second terminal device.
  • the second terminal device may send the second CBR carrier selection threshold and/or the second CBR carrier retention threshold to the first terminal device after determining the second CBR carrier selection threshold and/or the second CBR carrier retention threshold. In this way, the first terminal device may select a candidate carrier according to the second CBR carrier selection threshold and/or the second CBR carrier retention threshold.
  • the method may further include: determining a target carrier from the candidate carriers, and sending information about the target carrier (e.g., an index or identifier of the target carrier) to the second terminal device. Afterwards, the first terminal device may send data on the target carrier, and correspondingly, the second terminal device may receive data on the target carrier.
  • the target carrier e.g., an index or identifier of the target carrier
  • the candidate carrier is suitable for the first terminal device and the second terminal device, the side link communication on the target carrier can be guaranteed.
  • a switching method is provided, which can be executed by a second terminal device, or by a component of the second terminal device (such as a processor, a chip, or a chip system, etc.), or by a logic module or software that can implement all or part of the functions of the second terminal device.
  • the second terminal device is a receiver of the data.
  • the method includes: determining a first measurement result; sending the first measurement result to a first terminal device.
  • the first measurement result includes the channel busy rate CBR of each carrier in the first carrier list measured by the second terminal device, or the first measurement result includes a second carrier list, the second carrier list is composed of at least one first carrier in the first carrier list, and the CBR of the first carrier measured by the second terminal device is lower than the corresponding CBR threshold.
  • the first measurement result is used by the first terminal device to determine a candidate carrier, and the candidate carrier is used to send data through the side link between the first terminal device and the second terminal device.
  • the second terminal device can measure the CBR of the carrier and then feed back the measurement result to the first terminal device.
  • the first terminal device can select a candidate carrier based on the measurement results of the CBR of the carrier by itself and the second terminal device. In this way, it is possible to ensure that the selected candidate carrier is applicable to both the first terminal device and the second terminal device as much as possible, thereby facilitating normal sidelink communication.
  • the method before determining the first measurement result, further includes: receiving a first carrier list from the first terminal device.
  • the first carrier list is a carrier list configured by an upper layer of the first terminal device, a carrier list supported by the network, a carrier list supported by the first terminal device, or an intersection of any two or three of the foregoing.
  • the first carrier list is a carrier list supported by both the first terminal device and the second terminal device; and before determining the first measurement result, the method also includes: receiving a configuration message from the first terminal device, the configuration message including the first carrier list and a feedback cycle, the configuration message being used by the second terminal device to periodically feed back the CBR of each carrier in the first carrier list according to the feedback cycle; wherein, sending the first measurement result to the first terminal device includes: sending the first measurement result to the first terminal device according to the feedback cycle.
  • the first carrier list is a carrier list configured by an upper layer of the second terminal device, a carrier list supported by the network, a carrier list supported by the second terminal device, or an intersection of any two or three of the foregoing.
  • the first measurement result further includes a CBR of each carrier in the second carrier list.
  • determining the first measurement result includes: measuring the CBR of each carrier in the first carrier list; for any carrier in the first carrier list, if the carrier satisfies the third condition, determining the carrier as the first carrier; or, if there is no sidelink authorization on all carriers in the first carrier list, for any carrier in the first carrier list, if the carrier satisfies the third condition, determining the carrier as the first carrier; or, if there is a sidelink authorization on some or all of the carriers in the first carrier list, for any carrier in the first carrier list that triggers carrier selection, if the carrier satisfies the fourth condition, determining the carrier as the first carrier, and for any carrier in the first carrier list that does not trigger carrier selection, if the carrier satisfies the third condition, determining the carrier as the first carrier.
  • the third condition is The CBR of the carrier measured by the second terminal device is lower than the second CBR carrier selection threshold corresponding to the carrier; the fourth condition is that the CBR of the carrier measured by the second terminal device is lower than the second CBR carrier retention threshold corresponding to the carrier.
  • the first measurement result further includes a second CBR carrier selection threshold and/or a second CBR carrier retention threshold.
  • the method before determining the first measurement result, also includes: receiving the priority of data from the first terminal device or the priority of the logical channel corresponding to the data; determining a second CBR carrier selection threshold and/or a second CBR carrier retention threshold based on the priority of the data or the priority of the logical channel corresponding to the data.
  • the method before determining the first measurement result, further includes: receiving a second CBR carrier selection threshold and/or a second CBR carrier retention threshold from the first terminal device.
  • the method may further include: receiving information about a target carrier from the first terminal device, wherein the target carrier is a candidate carrier.
  • the candidate carrier is suitable for the first terminal device and the second terminal device, the side link communication on the target carrier can be guaranteed.
  • a switching method is provided, which can be executed by a first terminal device, or by a component of the first terminal device (such as a processor, a chip, or a chip system, etc.), or by a logic module or software that can implement all or part of the functions of the first terminal device.
  • the first terminal device is the sender of the data.
  • the method includes: measuring the CBR of each carrier in a first carrier list, where the first carrier list is a carrier list configured by an upper layer of a first terminal device, a carrier list supported by a network, a carrier list supported by the first terminal device, or an intersection of any two or three of the foregoing; sending a first measurement result to a second terminal device, where the first measurement result includes the CBR of each carrier in the first carrier list, or the first measurement result includes a second carrier list, where the second carrier list is composed of at least one first carrier in the first carrier list, and the CBR of the first carrier measured by the first terminal device is lower than the corresponding CBR threshold; receiving information about candidate carriers from the second terminal device, where the candidate carriers are obtained by the second terminal device based on the first measurement result and the CBR measurement of each carrier in the first carrier list or the second carrier list by the second terminal device, and the candidate carriers are used to send data through a side link between the first terminal device and the second terminal device.
  • the first carrier list is a carrier list configured by an upper
  • the first terminal device can measure the CBR of the carrier and then feed back the measurement result to the second terminal device.
  • the second terminal device can select a candidate carrier based on the measurement results of the CBR of the carrier by itself and the first terminal device. Then, the second terminal device informs the first terminal device of the information of the candidate carrier. In this way, it is possible to ensure that the selected candidate carrier is applicable to both the first terminal device and the second terminal device as much as possible, which is conducive to ensuring normal sidelink communication.
  • the method before sending the first measurement result to the second terminal device, the method further includes: for any carrier in the first carrier list, if the carrier satisfies the first condition, determining the carrier as the first carrier; or, if there is no sidelink authorization on all carriers in the first carrier list, for any carrier in the first carrier list, if the carrier satisfies the first condition, determining the carrier as the first carrier; or, if there is a sidelink authorization on some or all of the carriers in the first carrier list, for any carrier in the first carrier list that triggers carrier selection, if the carrier satisfies the second condition, determining the carrier as the first carrier, and for any carrier in the first carrier list that does not trigger carrier selection, if the carrier satisfies the first condition, determining the carrier as the first carrier.
  • the first terminal device can select carriers whose CBR is lower than the corresponding first CBR carrier selection/retention threshold from the first carrier list, and feed back these carriers to the second terminal device.
  • the first measurement result further includes a CBR of each carrier in the second carrier list.
  • the first measurement result also includes one or more of the following threshold information: a first CBR carrier selection threshold, a first CBR carrier retention threshold, a second CBR carrier selection threshold, or a second CBR carrier retention threshold, and the threshold information is used by the second terminal device to determine a candidate carrier.
  • the first measurement result also includes the priority of the data or the priority of the logical channel corresponding to the data, and the priority of the data or the priority of the logical channel corresponding to the data is used by the second terminal device to determine the second CBR carrier selection threshold and/or the second CBR carrier retention threshold, and the second CBR carrier selection threshold and/or the second CBR carrier retention threshold is used by the second terminal device to determine the candidate carrier.
  • the method may further include: receiving information about candidate carriers from the second terminal device; determining a target carrier from the candidate carriers, and sending information about the target carrier (e.g., an index or identifier of the target carrier) to the second terminal device. Afterwards, the first terminal device may send data on the target carrier, and correspondingly, the second terminal device may receive data on the target carrier.
  • the target carrier e.g., an index or identifier of the target carrier
  • the candidate carrier is suitable for the first terminal device and the second terminal device, the side link communication on the target carrier can be guaranteed.
  • a switching method is provided, which can be executed by a second terminal device, or by a component of the second terminal device (such as a processor, a chip, or a chip system, etc.), or by a logic module or software that can implement all or part of the functions of the second terminal device.
  • the second terminal device is the receiver of the data.
  • the method includes: receiving a first measurement result from a first terminal device, the first measurement result includes the CBR of each carrier in a first carrier list measured by the first terminal device, or the first measurement result includes a second carrier list, the first carrier list is a carrier list configured by an upper layer of the first terminal device, a carrier list supported by the network, a carrier list supported by the first terminal device, or an intersection of any two or three of the foregoing, the second carrier list is composed of at least one first carrier in the first carrier list, and the CBR of the first carrier measured by the first terminal device is lower than the corresponding CBR threshold; measuring the CBR of each carrier in the first carrier list or the second carrier list to obtain a second measurement result; determining a candidate carrier according to the first measurement result and the second measurement result, the candidate carrier being used to send data through the first terminal device through a side link between the first terminal device and the second terminal device; and sending information about the candidate carrier to the first terminal.
  • the first carrier list is a carrier list configured by an upper layer of the first terminal device
  • the first terminal device can measure the CBR of the carrier and then feed back the measurement result to the second terminal device.
  • the second terminal device can select a candidate carrier based on the measurement results of the CBR of the carrier by itself and the first terminal device. Then, the second terminal device informs the first terminal device of the information of the candidate carrier. In this way, it is possible to ensure that the selected candidate carrier is applicable to both the first terminal device and the second terminal device as much as possible, which is conducive to ensuring normal sidelink communication.
  • the first measurement result includes the CBR of each carrier in the first carrier list.
  • determining the candidate carrier includes: for any carrier in the first carrier list, if the carrier satisfies the third condition, determining the carrier as a candidate carrier; or, if there is no sidelink authorization on all carriers in the first carrier list, for any carrier in the first carrier list, if the carrier satisfies the third condition, determining the carrier as a candidate carrier; or, if there is a sidelink authorization on some or all carriers in the first carrier list, for any carrier in the first carrier list that triggers carrier selection, if the carrier satisfies the fourth condition, determining the carrier as a candidate carrier, and for any carrier in the first carrier list that does not trigger carrier selection, if the carrier satisfies the third condition, determining the carrier as a candidate carrier.
  • the third condition is that the CBR of the carrier measured by the first terminal device is lower than the first CBR carrier selection threshold corresponding to the carrier, and the CBR of the carrier measured by the second terminal device is lower than the second CBR carrier selection threshold corresponding to the carrier, or the third condition is that the average of the CBR of the carrier measured by the first terminal device and the CBR of the carrier measured by the second terminal device is lower than the first CBR carrier selection threshold corresponding to the carrier or the second CBR carrier selection threshold corresponding to the carrier.
  • the fourth condition is that the CBR of the carrier measured by the first terminal device is lower than the first CBR carrier retention threshold corresponding to the carrier, and the CBR of the carrier measured by the second terminal device is lower than the second CBR carrier retention threshold corresponding to the carrier, or the fourth condition is that the average of the CBR of the carrier measured by the first terminal device and the CBR of the carrier measured by the second terminal device is lower than the first CBR carrier retention threshold corresponding to the carrier or the second CBR carrier retention threshold corresponding to the carrier.
  • the first measurement result further includes a CBR of each carrier in the second carrier list.
  • the first measurement result includes a second carrier list; wherein, determining a candidate carrier according to the first measurement result and the second measurement result includes: for any carrier in the second carrier list, if the carrier satisfies a third condition, determining the carrier as a candidate carrier; or, if there is no sidelink authorization on all carriers in the second carrier list, for any carrier in the second carrier list, if the carrier satisfies the third condition, determining the carrier as a candidate carrier; or, if there is a sidelink authorization on some or all of the carriers in the second carrier list, for any carrier in the second carrier list that triggers carrier selection, if the carrier satisfies a fourth condition, determining the carrier as a candidate carrier, For any carrier in the second carrier list that does not trigger carrier selection, if the carrier meets the third condition, the carrier is determined as a candidate carrier.
  • the CBR measurement results of the candidate carrier selected by the first terminal device on the first terminal device side and the second terminal device side are lower than the corresponding CBR carrier selection/retention threshold, which can ensure that the candidate carrier is suitable for both the first terminal device and the second terminal device, thereby ensuring normal side link communication.
  • determining a candidate carrier according to the first measurement result and the second measurement result includes: for any carrier in the second carrier list, if the carrier satisfies the third condition, determining the carrier as a candidate carrier; or, if there is no sidelink authorization on all carriers in the second carrier list, for any carrier in the second carrier list, if the carrier satisfies the third condition, determining the carrier as a candidate carrier; or, if there is a sidelink authorization on some or all carriers in the second carrier list, for any carrier in the second carrier list that triggers carrier selection, if the carrier satisfies the fourth condition, determining the carrier as a candidate carrier, and for any carrier in the second carrier list that does not trigger carrier selection, if the carrier satisfies the third condition, determining the carrier as a candidate carrier.
  • the third condition is that the average of the CBR of the carrier measured by the first terminal device and the CBR of the carrier measured by the second terminal device is lower than the first CBR carrier selection threshold corresponding to the carrier or the second CBR carrier selection threshold corresponding to the carrier;
  • the fourth condition is that the average of the CBR of the carrier measured by the first terminal device and the CBR of the carrier measured by the second terminal device is lower than the first CBR carrier retention threshold corresponding to the carrier or the second CBR carrier retention threshold corresponding to the carrier.
  • the first measurement result further includes one or more of the following: a first CBR carrier selection threshold, a first CBR carrier retention threshold, a second CBR carrier selection threshold, or a second CBR carrier retention threshold.
  • the first measurement result also includes the priority of the data or the priority of the logical channel corresponding to the data; and the method also includes: determining a second CBR carrier selection threshold and/or a second CBR carrier retention threshold based on the priority of the data or the priority of the logical channel corresponding to the data.
  • the method may further include: receiving information about a target carrier from the first terminal device, wherein the target carrier is a candidate carrier.
  • the candidate carrier is suitable for the first terminal device and the second terminal device, the side link communication on the target carrier can be guaranteed.
  • a communication device comprising a module or unit for executing the method in the first aspect or any possible implementation of the first aspect, or comprising a module or unit for executing the method in the second aspect or any possible implementation of the second aspect, or comprising a module or unit for executing the method in the third aspect or any possible implementation of the third aspect, or comprising a module or unit for executing the method in the fourth aspect or any possible implementation of the fourth aspect.
  • a communication device comprising a processor, the processor being coupled to a memory, the memory being used to store computer programs or instructions, and the processor being used to execute the computer programs or instructions stored in the memory to implement the method in the first aspect or any possible implementation of the first aspect, or the method in the second aspect or any possible implementation of the second aspect, or the method in the third aspect or any possible implementation of the third aspect, or the method in the fourth aspect or any possible implementation of the fourth aspect.
  • the device further includes a memory coupled to the processor.
  • processors there are one or more processors and/or one or more memories.
  • the memory may be integrated with the processor, or the memory may be separately provided with the processor.
  • the device further includes a communication interface, and the processor is coupled to the communication interface.
  • the apparatus is a terminal device (eg, a first terminal device or a second terminal device).
  • the communication interface may be a transceiver, or an input/output interface.
  • the apparatus is a chip in a terminal device (eg, a first terminal device or a second terminal device).
  • the communication interface may be an input/output interface.
  • a processor comprising: an input circuit, an output circuit, and a processing circuit.
  • the processing circuit is used to receive a signal through the input circuit and transmit a signal through the output circuit, so that the processor executes the method in the first aspect or any possible implementation of the first aspect, or the method in the second aspect or any possible implementation of the second aspect, or the method in the third aspect or any possible implementation of the third aspect, or the method in the fourth aspect or any possible implementation of the fourth aspect.
  • the above-mentioned processor can be a chip
  • the input circuit can be an input pin
  • the output circuit can be an output pin
  • the processing circuit can be a transistor, a gate circuit, a trigger, and various logic circuits.
  • the input signal received by the input circuit can be, for example, but not limited to, received and input by a receiver
  • the signal output by the output circuit can be, for example, but not limited to, output to a transmitter and transmitted by the transmitter
  • the input circuit and the output circuit can be the same circuit, which is used as an input circuit and an output circuit at different times.
  • This application does not limit the specific implementation of the processor and various circuits.
  • a communication system comprising the first terminal device in the aforementioned first aspect and/or the second terminal device in the second aspect, or comprising the first terminal device in the aforementioned third aspect and/or the second terminal device in the fourth aspect.
  • a computer program product comprising: a computer program (also referred to as code, or instruction), which, when executed, enables a computer to execute the method in the first aspect or any possible implementation of the first aspect, or the method in the second aspect or any possible implementation of the second aspect, or the method in the third aspect or any possible implementation of the third aspect, or the method in the fourth aspect or any possible implementation of the fourth aspect.
  • a computer program also referred to as code, or instruction
  • a computer-readable storage medium which stores a computer program (also referred to as code, or instructions).
  • the computer program runs on a computer, the computer executes the method in the first aspect or any possible implementation of the first aspect, or the method in the second aspect or any possible implementation of the second aspect, or the method in the third aspect or any possible implementation of the third aspect, or the method in the fourth aspect or any possible implementation of the fourth aspect.
  • a chip comprising a processor, which is used to call and run a computer program from a memory, so that a communication device equipped with the chip executes the method in the first aspect or any possible implementation of the first aspect, or the method in the second aspect or any possible implementation of the second aspect, or the method in the third aspect or any possible implementation of the third aspect, or the method in the fourth aspect or any possible implementation of the fourth aspect.
  • FIG1 is a schematic diagram of a communication system provided in an embodiment of the present application.
  • FIG2 is a schematic diagram of selecting a candidate carrier according to an embodiment of the present application.
  • FIG3 is a schematic flow chart of a communication method provided in an embodiment of the present application.
  • FIG4 is a schematic flow chart of a communication method provided in an embodiment of the present application.
  • FIG5 is a schematic flow chart of a communication method provided in an embodiment of the present application.
  • FIG6 is a schematic flow chart of a communication method provided in an embodiment of the present application.
  • FIG7 is a schematic block diagram of a communication device provided in an embodiment of the present application.
  • FIG8 is a schematic block diagram of another communication device provided in an embodiment of the present application.
  • FIG. 9 is a schematic structural diagram of a terminal device provided in an embodiment of the present application.
  • At least one of a, b, or c can represent: a, b, c, ab, ac, bc, or abc, where a, b, c can be single or multiple.
  • the words “first” and “second” are used to distinguish the same or similar items with basically the same functions and effects. Those skilled in the art can understand that the words “first”, “second”, etc. do not limit the quantity and execution order, and the words “first”, “second”, etc. do not necessarily limit the differences.
  • LTE long term evolution
  • 5G fifth generation
  • NR new radio
  • V2X vehicle to everything
  • V2X vehicle to everything
  • V2V vehicle to vehicle
  • V2P vehicle to pedestrian
  • V2N vehicle to network
  • V2I vehicle to infrastructure
  • Another example is indoor commercial scenarios, such as mobile phone to smart screen communication, mobile phone to VR glasses communication, etc.
  • the terminal device in the embodiment of the present application may refer to (user equipment, UE), station, access terminal, user unit, user station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent or user device.
  • the terminal device may also be a cellular phone, a cordless phone, a session initiation protocol (SIP) phone, a wireless local loop (WLL) station, a personal digital assistant (PDA), a handheld device with wireless communication function, a computing device or other processing device connected to a wireless modem, a large screen, a vehicle-mounted device, a wearable device, a terminal device in a 5G network or a terminal device in a public land mobile network (PLMN) to be evolved in the future, etc., and the embodiment of the present application does not limit this.
  • the types of the two terminal devices (transmitter and receiver) involved in the embodiment of the present application may be the same or different, such as both terminal devices are mobile phones, or one is a mobile phone and the
  • the network device in the embodiment of the present application refers to a radio access network (RAN) node (or device) that connects the terminal device to the wireless network, which can also be called a base station.
  • the network device can be an evolved NodeB (eNodeB), a transmission reception point (TRP), a next generation NodeB (gNB) in a 5G mobile communication system, a base station in a future mobile communication system or an access node (AP) in a WiFi system, a wireless controller in a cloud radio access network (CRAN) scenario, a relay station, an access point, a vehicle-mounted device, a wearable device, and network devices in other communication systems that will evolve in the future.
  • the network device can also be a module or unit that completes some functions of a base station, for example, a centralized unit (CU) or a distributed unit (DU). This application does not limit the specific technology and specific device form used by the network device.
  • the terminal device includes a hardware layer, an operating system layer running on the hardware layer, and an application layer running on the operating system layer.
  • the hardware layer includes hardware such as a central processing unit (CPU), a memory management unit (MMU), and a memory (also called main memory).
  • the operating system can be any one or more computer operating systems that implement business processing through processes, such as Linux operating system, Unix operating system, Android operating system, iOS operating system, or Windows operating system.
  • the application layer includes applications such as browsers, address books, word processing software, and instant messaging software.
  • the embodiment of the present application does not specifically limit the specific structure of the execution subject of the method provided in the embodiment of the present application.
  • the execution subject of the method provided in the embodiment of the present application can be a terminal device or a network device, or a functional module in the terminal device or network device that can call and execute a program.
  • computer-readable media may include, but are not limited to: magnetic storage devices (e.g., hard disks, floppy disks or tapes, etc.), optical disks (e.g., compact discs (CDs), digital versatile discs (DVDs), etc.), smart cards and flash memory devices (e.g., erasable programmable read-only memory (EPROM), cards, sticks or key drives, etc.).
  • the various storage media described herein may represent one or more devices and/or other machine-readable media for storing information.
  • machine-readable medium may include, but is not limited to, wireless channels and various other media capable of storing, containing and/or carrying instructions and/or data.
  • FIG1 shows a schematic block diagram of a communication system applicable to the present application.
  • the system 100 includes two communication interfaces, namely, a PC5 interface and a Uu interface.
  • the PC5 interface is a direct communication interface between two terminal devices (e.g., the terminal device 110 and the terminal device 120 shown in the figure).
  • the direct communication link between the terminal devices is also defined as a side link or a side link.
  • the Uu interface is an interface for communication between a terminal device (eg, the terminal device 110 or the terminal device 120 ) and the network device 130 .
  • the communication system shown in FIG. 1 may also include more network nodes, such as more terminal devices or network devices, and the embodiments of the present application are no longer shown one by one in the figure.
  • the CBR of a carrier can reflect the occupancy rate of the channel, subchannel or resource corresponding to the carrier to a certain extent.
  • the CBR is lower than a certain threshold, it is considered that the channel, subchannel or resource corresponding to the carrier is used by fewer nearby users. Then, when data is transmitted through this carrier, the interference is small, thereby ensuring the effectiveness of SL resource transmission.
  • the terminal device 110 can transmit data to the terminal device 120 via the side link between the terminal device 110 and the terminal device 120. Before transmitting data, the terminal device 110 first needs to determine the candidate carrier by measuring the CBR of the carrier, and then select a suitable carrier to transmit data according to the CBR of the candidate carrier.
  • the terminal device when the upper layer of the terminal device sends the service data to the access layer, it informs the terminal device of the priority of the service data and the corresponding available carrier list. Combined with the CBR carrier selection threshold and CBR carrier retention threshold of the carrier at different priorities, the terminal device can obtain the list of carriers available for the sent service data, as well as the CBR threshold corresponding to each carrier in the carrier list. As shown in Figure 2, the list of carriers available for service data is ⁇ F1, F2, F3 ⁇ . Since the priority of the service data sent by the terminal device is PPPP1, the corresponding CBR carrier selection thresholds of F1, F2 and F3 are 0.6, 0.5 and 0.6, respectively. Furthermore, the CBR values of carriers F1, F2 and F3 measured by the terminal device are 0.7, 0.4 and 0.3, respectively. Only carriers F2 and F3 are lower than the corresponding CBR carrier selection thresholds, so F2 and F3 are candidate carriers.
  • SL transmission includes not only broadcast services but also unicast and multicast services, where unicast and multicast services need to ensure the communication quality of the other end. Then, if the candidate carrier selected by the terminal device 110 is not suitable for the terminal device 120, it may cause the terminal device 120 to fail to receive.
  • the present application provides a communication method, which selects a candidate carrier by combining the measurement results of the CBR of the carrier by two terminal devices based on side link communication, so as to ensure that the selected candidate carrier is applicable to both terminal devices as much as possible, thereby facilitating normal side link communication.
  • no sidelink grant on a carrier means that there are no reserved resources on the carrier.
  • “there is a sidelink grant” on a carrier means that there are reserved resources on the carrier.
  • the carrier that "triggering carrier selection" involved in this application means that the location of the resources reserved on the carrier does not meet the data delay requirement; or, the resources reserved on the carrier cannot accommodate all the data to be transmitted.
  • a carrier that "does not trigger carrier selection" means that the location of the resources reserved on the carrier meets the delay requirement of the data; or, the resources reserved on the carrier can accommodate all the data to be transmitted.
  • the carrier involved in the present application that triggers carrier selection may also be replaced by a carrier that triggers carrier reselection.
  • the carrier that does not trigger carrier selection may also be replaced by a carrier that does not trigger carrier reselection.
  • the terminal device for example, the first terminal device or the second terminal device
  • the terminal device in the schematic flowchart can also be a chip, a chip system, or a processor that supports the terminal device to implement the method, or a logic module or software that can implement all or part of the functions of the terminal device.
  • the first terminal device eg, terminal device 110
  • the second terminal device eg, terminal device 120
  • FIG3 is a schematic flow chart of a communication method provided by the present application.
  • the method 200 may include S210 to S230. Each step is described in detail below.
  • the second terminal device determines a first measurement result.
  • the second terminal device sends the first measurement result to the first terminal device.
  • the first terminal device receives the first measurement result from the second terminal device.
  • the first measurement result includes the CBR of each carrier in the first carrier list measured by the second terminal device.
  • the second terminal device may measure the CBR of each carrier in the first carrier list, and the second terminal device may feed back the measured CBR of each carrier in the first carrier list to the first terminal device.
  • the first carrier list may be a carrier list configured by an upper layer of the second terminal device, a carrier list supported by the network, a carrier list supported by the second terminal device, or an intersection of any two or three of the foregoing.
  • the first carrier list can be the carrier list configured by the upper layer of the second terminal device.
  • the carriers in the carrier list supported by the second terminal device satisfy: the carrier is a carrier configured by the upper layer of the second terminal device and the carrier is a carrier supported by the network, then the first carrier list can be a carrier list supported by the second terminal device.
  • the carrier list configured by the upper layer of the second terminal device, the carrier list supported by the network, and the carrier list supported by the second terminal device are independent, so the first carrier list can be the intersection of these three carrier lists.
  • the carrier list configured by the upper layer of the second terminal device, the carrier list supported by the network, and the carrier list supported by the second terminal device are ⁇ 1, 2, 3, 4, 5, 6, 7, 8, 9 ⁇ , ⁇ 1, 3, 4, 6, 7, 8, 9 ⁇ , ⁇ 1, 2, 3, 4, 5, 6, 7, 9 ⁇ , respectively, so the first carrier list can be ⁇ 1, 3, 4, 6, 7, 9 ⁇ .
  • the carrier list configured by the upper layer of the second terminal device may refer to: a carrier list related to the service data type configured by the upper layer of the second terminal device.
  • the service data here refers to the data that the first terminal device is about to send to the second terminal device, that is, the data to be transmitted or sent by the first terminal device.
  • the list of carriers that the network can support may refer to: the network device notifies the second terminal device of the list of carriers that the network can support or the list of carriers from pre-configuration information in a configuration message sent to the second terminal device.
  • the first carrier list may be preconfigured or configured by the network device for the second terminal device.
  • the first carrier list may be included in a SL preconfiguration message (eg, SL-PreconfigurationNR). Further, the first carrier list may be sl-FreqInfoToAddModList.
  • the network device may send the first carrier list via a radio resource control (RRC) message.
  • RRC radio resource control
  • the RRC message may be an RRC reconfiguration message (RRCReconfiguration), which may be sent after the network device receives a SecurityModeComplete message or after the network device sends a SecurityModeCommand.
  • RRCReconfiguration RRC reconfiguration message
  • the network device may send a first carrier list via a system information block (SIB) message (e.g., SIB2).
  • SIB system information block
  • the first carrier list is sent by the first terminal device to the second terminal device.
  • the method may further include:
  • a first terminal device determines a first carrier list.
  • the first terminal device sends a first carrier list to the second terminal device.
  • the second terminal device receives the first carrier list from the first terminal device.
  • the first terminal device sends the identifier of each carrier in the first carrier list to the second terminal device.
  • the first carrier list can be a carrier list configured by the upper layer of the first terminal device, a carrier list supported by the network, a carrier list supported by the first terminal device, or an intersection of any two or three of the foregoing.
  • the carrier is a carrier that can be supported by the network and the first terminal device
  • the first carrier list can be a carrier list configured by the upper layer of the first terminal device.
  • the carriers in the carrier list supported by the first terminal device satisfy: the carrier is a carrier configured by the upper layer of the first terminal device and the carrier is a carrier supported by the network, then the first carrier list can be a carrier list supported by the first terminal device.
  • the carrier list configured by the upper layer of the first terminal device, the carrier list supported by the network, and the carrier list supported by the first terminal device are three independent carrier lists. Then, the first carrier list can be the intersection of these three carrier lists.
  • the carrier list configured by the upper layer of the first terminal device may refer to: a carrier list related to the service data type configured by the upper layer of the first terminal device, wherein the service data type here refers to the type of data (or service data) to be sent.
  • the list of carriers that the network can support may refer to: the network device notifies the first terminal device of the list of carriers that the network can support or the list of carriers from pre-configuration information in a configuration message sent to the first terminal device.
  • the first carrier list may be preconfigured or configured by the network device for the first terminal device.
  • the first carrier list may be included in a SL preconfiguration message (eg, SL-PreconfigurationNR).
  • the first carrier list may be sl-FreqInfoToAddModList.
  • the network device may send the first carrier list via an RRC message.
  • the RRC message may be an RRC reconfiguration message (RRCReconfiguration), and the RRC reconfiguration message may be sent after the network device receives a SecurityModeComplete message or after the network device sends a SecurityModeCommand.
  • RRCReconfiguration RRC reconfiguration message
  • the network device may send the first carrier list through a SIB message (eg, SIB2).
  • SIB message eg, SIB2
  • S201 can be triggered.
  • the first carrier list may be sent via a PC5-RRC message or a sidelink control information (SCI) message.
  • SCI sidelink control information
  • the second terminal device may periodically execute S210 and S220.
  • the first terminal device may send a configuration message to the second terminal device, the configuration message being used to configure the first carrier list and the feedback period.
  • the second terminal device periodically measures and feeds back the CBR of each carrier in the first carrier list according to the configuration of the first terminal device.
  • the first carrier list may be a carrier list that the first terminal device and the second terminal device can both support, as negotiated by the first terminal device and the second terminal device.
  • the first carrier list may be a carrier list configured by an upper layer of the first terminal device, a carrier list that the network can support, a carrier list that the first terminal device can support, or an intersection of any two or three of the foregoing.
  • the first terminal device determines a candidate carrier according to the first measurement result and the second measurement result.
  • the first terminal device may execute the following S230 when there is data to be sent.
  • the candidate carrier determined in step S230 may be one or more. In other words, what is determined in step S230 is actually a list of candidate carriers.
  • the candidate carriers may be used by the first terminal device to send data to the second terminal device via the SL.
  • the first terminal device can measure the CBR of each carrier in the first carrier list, and determine the candidate carrier by combining the CBR of each carrier in the first carrier list measured by itself (i.e., the second measurement result) and the CBR of each carrier in the first carrier list measured by the second terminal device.
  • the carrier is determined as a candidate carrier.
  • condition 1 is that the CBR of the carrier measured by the first terminal device is lower than the first CBR carrier selection threshold corresponding to the carrier, and the CBR of the carrier measured by the second terminal device is lower than the second CBR carrier selection threshold corresponding to the carrier.
  • condition 1 is that the average of the CBR of the carrier measured by the first terminal device and the CBR of the carrier measured by the second terminal device is lower than the first CBR carrier selection threshold corresponding to the carrier or the second CBR carrier selection threshold corresponding to the carrier.
  • the first carrier list is ⁇ 1, 3, 4, 6, 7, 9 ⁇ . If the CBR of carrier #1 measured by the first terminal device is lower than the first CBR carrier selection threshold corresponding to carrier #1, and the CBR of carrier #1 measured by the second terminal device is lower than the second CBR carrier selection threshold corresponding to carrier #1, the CBR of carrier #3 measured by the first terminal device is lower than the first CBR carrier selection threshold corresponding to carrier #3, and the CBR of carrier #3 measured by the second terminal device is lower than the second CBR carrier selection threshold corresponding to carrier #3, then carrier #1 and carrier #3 can be selected as candidate carriers.
  • the carrier is determined as a candidate carrier.
  • the solution described in the previous example may be used to determine the candidate carrier.
  • the carrier when there is sidelink authorization on some or all of the carriers in the first carrier list: for any carrier in the first carrier list that triggers carrier selection, if the carrier meets condition 2, the carrier is determined as a candidate carrier; for any carrier in the first carrier list that does not trigger carrier selection, if the carrier meets condition 1, the carrier is determined as a candidate carrier.
  • condition 2 is that the CBR of the carrier measured by the first terminal device is lower than the first CBR carrier retention threshold corresponding to the carrier, and the CBR of the carrier measured by the second terminal device is lower than the second CBR carrier retention threshold corresponding to the carrier.
  • condition 2 is the CBR of the carrier measured by the first terminal device and the CBR of the carrier measured by the second terminal device.
  • the average CBR is lower than the first CBR carrier retention threshold corresponding to the carrier or the second CBR carrier retention threshold corresponding to the carrier.
  • the first carrier list is ⁇ 1, 3, 4, 6, 7, 9 ⁇ . If carrier #1 and carrier #4 trigger carrier selection, and carrier #1 meets condition 2, other carriers do not trigger carrier selection, and carrier #6 meets condition 1, then carrier #1 and carrier #6 can be used as candidate carriers.
  • the first terminal device may notify the second terminal device whether the carrier triggers carrier selection.
  • the first CBR carrier selection threshold and the second CBR carrier selection threshold corresponding to the carrier may be equal, and the first CBR carrier retention threshold and the second CBR carrier retention threshold corresponding to the carrier may be equal.
  • the first CBR carrier selection threshold and the first CBR carrier retention threshold corresponding to the carrier may be equal, and the second CBR carrier selection threshold and the second CBR carrier retention threshold corresponding to the carrier may be equal.
  • the first terminal device may determine the first CBR carrier selection threshold and/or the first CBR carrier retention threshold corresponding to each carrier in the first carrier list according to the priority of the data to be transmitted or the priority of the logical channel corresponding to the data.
  • the priority of the data or the priority of the logical channel corresponding to the data, the carrier, the first CBR carrier selection threshold and/or the first CBR carrier retention threshold have a corresponding relationship.
  • the first CBR carrier selection threshold and/or the first CBR carrier retention threshold corresponding to the carrier can be determined. For example, referring to FIG2, for carrier F1, when the above priority is PPPP2, the first CBR carrier selection threshold and/or the first CBR carrier retention threshold corresponding to the carrier can be 0.6.
  • the second CBR carrier selection threshold and/or the second CBR carrier retention threshold corresponding to the carrier may be notified by the first terminal device to the second terminal device.
  • the first terminal device may send the priority of the data to be transmitted or the priority of the logical channel corresponding to the data to the second terminal device, and the second terminal device may determine the second CBR carrier selection threshold and/or the second CBR carrier retention threshold corresponding to each carrier based on the priority.
  • the second terminal device may also send the second CBR carrier selection threshold and/or the second CBR carrier retention threshold to the first terminal device.
  • the first measurement result may include the second CBR carrier selection threshold and/or the second CBR carrier retention threshold.
  • the first terminal device can determine the candidate carrier by combining its own measurement result of the CBR of each carrier in the first carrier list and the measurement result of the CBR of each carrier in the first carrier list by the second terminal device.
  • the candidate carrier is applicable to both the first terminal device and the second terminal device as much as possible, which is conducive to ensuring normal sidelink communication.
  • the first terminal device may use some of the candidate carriers, such as using only a certain candidate carrier to send data to the second terminal device.
  • the method may further include:
  • the first terminal device determines a target carrier from candidate carriers.
  • the first terminal device may select a target carrier in ascending order of the CBR of the candidate carriers.
  • the first terminal device may select a carrier with the highest CBR measured by the first terminal device among the candidate carriers as the target carrier.
  • the first terminal device sends target carrier information to the second terminal device.
  • the first terminal device may send an identifier of the target carrier to the second terminal device.
  • the first terminal device can select resources from the target carrier to transmit the data to be sent.
  • FIG4 is a schematic flow chart of a communication method provided by the present application.
  • the method 300 may include S310 to S330. Each step is described in detail below.
  • the second terminal device determines a first measurement result.
  • the second terminal device sends the first measurement result to the first terminal device.
  • the first terminal device receives the first measurement result from the second terminal device.
  • the second terminal device may measure the CBR of each carrier in the first carrier list, and select at least one first carrier from the first carrier list according to the measured CBR of each carrier in the first carrier list.
  • the carrier list consisting of the at least one first carrier may be recorded as the second carrier list.
  • the first measurement result may include the second carrier list.
  • the CBR corresponding to the first carrier is lower than the corresponding CBR threshold.
  • the carrier is determined as the first carrier.
  • condition 3 is that the CBR of the carrier measured by the second terminal device is lower than the second CBR carrier selection threshold corresponding to the carrier.
  • the first carrier list is ⁇ 1, 3, 4, 6, 7, 9 ⁇
  • the second terminal device measures the CBR of each carrier in the first carrier list and the second CBR carrier selection threshold corresponding to each carrier as shown in Table 1.
  • the CBRs of carrier #1, carrier #4, and carrier #6 are all lower than the corresponding second CBR carrier selection threshold, and the CBRs of other carriers are all higher than the corresponding second CBR carrier selection threshold. Therefore, carrier #1, carrier #4, and carrier #6 are first carriers, and accordingly, the second carrier list is ⁇ 1, 4, 6 ⁇ .
  • the carrier is determined as the first carrier.
  • the first carrier or the second carrier list may be determined according to the method described in the previous example.
  • the carrier when there is sidelink authorization on some or all of the carriers in the first carrier list: for any carrier in the first carrier list that triggers carrier selection, if the carrier meets condition 4, the carrier is determined as the first carrier; for any carrier in the first carrier list that does not trigger carrier selection, if the carrier meets condition 3, the carrier is determined as the first carrier.
  • condition 4 is that the CBR of the carrier measured by the second terminal device is lower than the second CBR carrier retention threshold corresponding to the carrier.
  • the carriers in the first carrier list have sidelink authorization, and the first carrier list is ⁇ 1, 3, 4, 6, 7, 9 ⁇ , where carrier #1 and carrier #4 trigger carrier selection, and other carriers do not trigger carrier selection.
  • the CBR of each carrier in the first carrier list measured by the second terminal device and the second CBR carrier selection threshold and the second CBR carrier retention threshold corresponding to each carrier are shown in Table 2.
  • the CBR of carrier #1 is lower than the corresponding second CBR carrier retention threshold, and the CBR of carrier #6 is lower than the corresponding second CBR carrier selection threshold. Therefore, carrier #1 and carrier #6 are first carriers, and accordingly, the second carrier list is ⁇ 1, 6 ⁇ .
  • the first terminal device may inform the second terminal device whether a carrier has a sidelink authorization.
  • how to determine whether the carrier triggers carrier selection may refer to the description in method 200.
  • the second terminal device determines the second CBR carrier selection threshold and/or the second CBR carrier retention threshold.
  • the method 300 may further include S301 and S302 , which are the same as S201 and S202 , and reference may be made to the description of S201 and S202 .
  • the first terminal device determines a candidate carrier according to the first measurement result and the second measurement result.
  • the candidate carrier determined in step S330 may be one or more. In other words, what is determined in step S330 is actually a list of candidate carriers.
  • the candidate carriers may be used by the first terminal device to send data to the second terminal device via the SL.
  • the first terminal device may measure the CBR of each carrier in the second carrier list, and determine a candidate carrier by combining the CBR of each carrier in the second carrier list measured by itself (ie, the second measurement result) and the first measurement result.
  • the carrier is determined as a candidate carrier.
  • condition 5 is that the CBR of the carrier measured by the first terminal device is lower than the first CBR carrier selection threshold corresponding to the carrier.
  • the second carrier list is ⁇ 1, 4, 6 ⁇ . If carrier #1 and carrier #4 satisfy condition 5 and carrier #6 does not satisfy condition 5, carrier #1 and carrier #4 can be used as candidate carriers.
  • the carrier is determined as a candidate carrier.
  • the carrier when there is sidelink authorization on some or all of the carriers in the second carrier list: for any carrier in the second carrier list that triggers carrier selection, if the carrier meets condition 6, the carrier is determined as a candidate carrier; for any carrier in the second carrier list that does not trigger carrier selection, if the carrier meets condition 5, the carrier is determined as a candidate carrier.
  • condition 6 is that the CBR of the carrier measured by the first terminal device is lower than the first CBR carrier retention threshold corresponding to the carrier.
  • the second carrier list is ⁇ 1, 4, 6 ⁇ . If carrier #1 and carrier #4 trigger carrier selection, and carrier #1 meets condition 6, other carriers do not trigger carrier selection, and carrier #6 meets condition 5, then carrier #1 and carrier #6 can be used as candidate carriers.
  • the first CBR carrier selection threshold and the second CBR carrier selection threshold corresponding to the carrier may be equal, and the first CBR carrier retention threshold and the second CBR carrier retention threshold corresponding to the carrier may be equal.
  • the first terminal device may determine the first CBR carrier selection threshold and/or the first CBR carrier retention threshold according to the priority of the data to be transmitted or the priority of the logical channel corresponding to the data.
  • the second terminal device may also send the second CBR carrier selection threshold and/or the second CBR carrier retention threshold to the first terminal device.
  • the first measurement result may include the second CBR carrier selection threshold and/or the second CBR carrier retention threshold.
  • the first terminal device can determine the candidate carrier according to the measurement result of the CBR of each carrier in the second carrier list fed back by the second terminal device based on the measurement of the CBR of the carrier.
  • the candidate carrier is applicable to both the first terminal device and the second terminal device as much as possible, which is conducive to ensuring normal sidelink communication.
  • method 300 may further include S340 and S350.
  • the first terminal device determines a target carrier from candidate carriers.
  • the first terminal device sends target carrier information to the second terminal device.
  • the first terminal device can select resources from the target carrier to transmit the data to be sent.
  • FIG5 is a schematic flow chart of a communication method provided by the present application.
  • the method 400 may include S410 to S430. Each step is described in detail below.
  • S410 The second terminal device determines a first measurement result.
  • the second terminal device sends the first measurement result to the first terminal device.
  • the first terminal device receives the first measurement result from the second terminal device.
  • the second terminal device can measure the CBR of each carrier in the first carrier list, and select at least one first carrier from the first carrier list according to the measured CBR of each carrier in the first carrier list.
  • the carrier list consisting of the at least one first carrier can be recorded as the second carrier list.
  • the first measurement result may include the second carrier list and the CBR of each carrier in the second carrier list measured by the second terminal device, that is, the first measurement result may include the CBR of each first carrier measured by the second terminal device. Among them, the CBR corresponding to the first carrier is lower than the corresponding CBR threshold.
  • how to determine whether the carrier triggers carrier selection may refer to the description in method 200.
  • the method 400 may further include S401 and S402 , which are the same as S201 and S202 , and reference may be made to the description of S201 and S202 .
  • the first terminal device determines a candidate carrier according to the first measurement result and the second measurement result.
  • the candidate carrier determined in step S430 may be one or more. In other words, what is determined in step S430 is actually a list of candidate carriers.
  • the candidate carriers may be used by the first terminal device to send data to the second terminal device via the SL.
  • the first terminal device may measure the CBR of each carrier in the second carrier list, and determine a candidate carrier by combining the CBR of each carrier in the second carrier list measured by itself (ie, the second measurement result) and the first measurement result.
  • the carrier is determined as a candidate carrier.
  • condition 7 is that the average of the CBR of the carrier measured by the first terminal device and the CBR of the carrier measured by the second terminal device is lower than the first CBR carrier selection threshold corresponding to the carrier or the second CBR carrier selection threshold corresponding to the carrier.
  • the carrier is determined as a candidate carrier.
  • the carrier when there is sidelink authorization on some or all of the carriers in the second carrier list: for any carrier in the second carrier list that triggers carrier selection, if the carrier meets condition 8, the carrier is determined as a candidate carrier; for any carrier in the second carrier list that does not trigger carrier selection, if the carrier meets condition 7, the carrier is determined as a candidate carrier.
  • condition 8 is that the average of the CBR of the carrier measured by the first terminal device and the CBR of the carrier measured by the second terminal device is lower than the first CBR carrier retention threshold corresponding to the carrier or the second CBR carrier retention threshold corresponding to the carrier.
  • step S430 the solution described in step S330 in method 300 may also be used to determine the candidate carrier.
  • the first CBR carrier selection threshold and the second CBR carrier selection threshold corresponding to the carrier may be equal, and the first CBR carrier retention threshold and the second CBR carrier retention threshold corresponding to the carrier may be equal.
  • the first terminal device may determine the first CBR carrier selection threshold and/or the first CBR carrier retention threshold according to the priority of the data to be transmitted or the priority of the logical channel corresponding to the data.
  • the second terminal device may also send the second CBR carrier selection threshold and/or the second CBR carrier retention threshold to the first terminal device.
  • the first measurement result may include the second CBR carrier selection threshold and/or the second CBR carrier retention threshold.
  • the first terminal device can determine the candidate carrier by combining the measurement result of the CBR of each carrier in the second carrier list by the second terminal device itself and the measurement result of the CBR of each carrier in the second carrier list by the second terminal device.
  • the candidate carrier is applicable to both the first terminal device and the second terminal device as much as possible, which is conducive to ensuring normal sidelink communication.
  • method 400 may further include S440 and S450.
  • the first terminal device determines a target carrier from candidate carriers.
  • the first terminal device sends target carrier information to the second terminal device.
  • S440 and S450 reference may be made to S240 and S250, or reference may be made to S340 and S350.
  • the communication methods described above are all performed by the first terminal device determining the candidate carrier.
  • the following is another communication method provided by the present application, in which the second terminal device determines the candidate carrier and informs the first terminal device of the information of the candidate carrier.
  • FIG6 is a schematic flow chart of another communication method provided by the present application.
  • the method 500 may include S510 to S560. Each step is described in detail below.
  • the first terminal device determines a first carrier list.
  • the first carrier list can be a carrier list configured by the upper layer of the first terminal device, a carrier list supported by the network, a carrier list supported by the first terminal device, or an intersection of any two or three of the foregoing.
  • the carrier is a carrier that can be supported by the network and the first terminal device
  • the first carrier list can be a carrier list configured by the upper layer of the first terminal device.
  • the carriers in the carrier list supported by the first terminal device satisfy: the carrier is a carrier configured by the upper layer of the first terminal device and the carrier is a carrier supported by the network, then the first carrier list can be a carrier list supported by the first terminal device.
  • the carrier list configured by the upper layer of the first terminal device, the carrier list supported by the network, and the carrier list supported by the first terminal device are three independent carrier lists. Then, the first carrier list can be the intersection of these three carrier lists.
  • the carrier list configured by the upper layer of the first terminal device may refer to: a carrier list related to the service data type configured by the upper layer of the first terminal device, wherein the service data type here refers to the type of data (or service data) to be sent.
  • the list of carriers that the network can support may refer to: the network device notifies the first terminal device of the list of carriers that the network can support or the list of carriers from pre-configuration information in a configuration message sent to the first terminal device.
  • the first carrier list may be preconfigured or configured by the network device for the first terminal device.
  • the first carrier list may be included in a SL preconfiguration message (eg, SL-PreconfigurationNR). Further, the first carrier list may be sl-FreqInfoToAddModList.
  • the network device may send the first carrier list via an RRC message.
  • the RRC message may be an RRC reconfiguration message (RRCReconfiguration), and the RRC reconfiguration message may be sent after the network device receives a SecurityModeComplete message or after the network device sends a SecurityModeCommand.
  • RRCReconfiguration RRC reconfiguration message
  • the network device may send the first carrier list through a SIB message (eg, SIB2).
  • SIB message eg, SIB2
  • the first terminal device determines a first measurement result.
  • the first terminal device may measure the CBR of each carrier in the first carrier list, and the CBR of each carrier in the first carrier list measured by the first terminal device may be used as the first measurement result.
  • the first terminal device may measure the CBR of each carrier in the first carrier list, and select at least one first carrier from the first carrier list based on the measured CBR of each carrier in the first carrier list.
  • the carrier list consisting of the at least one first carrier may be recorded as a second carrier list.
  • the first measurement result may include a second carrier list.
  • the first measurement result may also include the CBR of each carrier in the second carrier list measured by the first terminal device, that is, the first measurement result may also include the CBR of each first carrier measured by the first terminal device. Among them, the CBR corresponding to the first carrier is lower than the corresponding CBR threshold.
  • the carrier is determined as the first carrier.
  • condition 1 is that the CBR of the carrier measured by the first terminal device is lower than the first CBR carrier selection threshold corresponding to the carrier.
  • the first carrier list is ⁇ 1, 2, 3, 5, 7, 9 ⁇
  • the first terminal device measures the CBR of each carrier in the first carrier list and the first CBR carrier selection threshold corresponding to each carrier as shown in Table 3.
  • the CBRs of carrier #1, carrier #2, and carrier #5 are all lower than the corresponding first CBR carrier selection threshold, and the CBRs of other carriers are all higher than the corresponding first CBR carrier selection threshold. Therefore, carrier #1, carrier #2, and carrier #5 are first carriers, and accordingly, the second carrier list is ⁇ 1, 2, 5 ⁇ .
  • the carrier is determined as the first carrier.
  • the first carrier or the second carrier list may be determined according to the method described in the previous example.
  • the carrier when there is sidelink authorization on some or all of the carriers in the first carrier list: for any carrier in the first carrier list that triggers carrier selection, if the carrier meets condition 2, the carrier is determined as the first carrier; for any carrier in the first carrier list that does not trigger carrier selection, if the carrier meets condition 1, the carrier is determined as the first carrier.
  • condition 2 is that the CBR of the carrier measured by the first terminal device is lower than the first CBR carrier retention threshold corresponding to the carrier.
  • the carriers in the first carrier list have sidelink authorization, and the first carrier list is ⁇ 1, 2, 3, 5, 7, 9 ⁇ , among which carrier #1 and carrier #3 trigger carrier selection, and other carriers do not trigger carrier selection.
  • the CBR of each carrier in the first carrier list measured by the first terminal device and the first CBR carrier selection threshold and the first CBR carrier retention threshold corresponding to each carrier are shown in Table 4.
  • the CBR of carrier #1 is lower than the corresponding first CBR carrier retention threshold, and the CBR of carrier #7 is lower than the corresponding first CBR carrier selection threshold. Therefore, carrier #1 and carrier #7 are first carriers, and accordingly, the second carrier list is ⁇ 1, 7 ⁇ .
  • the first terminal device may determine the first CBR carrier selection threshold and/or the first CBR carrier retention threshold corresponding to each carrier according to the priority of the data to be transmitted or the priority of the logical channel corresponding to the data.
  • the first terminal device sends the first measurement result to the second terminal device.
  • the second terminal device receives the first measurement result from the first terminal device.
  • S540 The second terminal device determines a second measurement result.
  • the second terminal device may measure the CBR of each carrier in the first carrier list, and the CBR of each carrier in the first carrier list measured by the second terminal device is the second measurement result.
  • the second terminal device may measure the CBR of each carrier in the second carrier list, and the CBR of each carrier in the second carrier list measured by the second terminal device is the second measurement result.
  • the second terminal device determines a candidate carrier according to the first measurement result and the second measurement result.
  • the second terminal device may determine a candidate carrier according to the CBR of each carrier in the first carrier list measured by itself and the first terminal device respectively.
  • the carrier is determined as a candidate carrier.
  • Condition 3 is that the CBR of the carrier measured by the first terminal device is lower than the first CBR carrier selection corresponding to the carrier. selection threshold, and the CBR of the carrier measured by the second terminal device is lower than the second CBR carrier selection threshold corresponding to the carrier.
  • condition 3 is that the average of the CBR of the carrier measured by the first terminal device and the CBR of the carrier measured by the second terminal device is lower than the first CBR carrier selection threshold corresponding to the carrier or the second CBR carrier selection threshold corresponding to the carrier.
  • the first carrier list is ⁇ 1, 2, 3, 5, 7, 9 ⁇ . If carrier #1 and carrier #2 meet condition 3 and other carriers do not meet condition 3, carrier #1 and carrier #2 can be used as candidate carriers.
  • the carrier is determined as a candidate carrier.
  • the carrier when there is sidelink authorization on some or all of the carriers in the first carrier list: for any carrier in the first carrier list that triggers carrier selection, if the carrier meets condition 4, the carrier is determined as a candidate carrier; for any carrier in the first carrier list that does not trigger carrier selection, if the carrier meets condition 3, the carrier is determined as a candidate carrier.
  • condition 4 is that the CBR of the carrier measured by the first terminal device is lower than the first CBR carrier retention threshold corresponding to the carrier, and the CBR of the carrier measured by the second terminal device is lower than the second CBR carrier retention threshold corresponding to the carrier.
  • condition 4 is that the average of the CBR of the carrier measured by the first terminal device and the CBR of the carrier measured by the second terminal device is lower than the first CBR carrier retention threshold corresponding to the carrier or the second CBR carrier retention threshold corresponding to the carrier.
  • the first carrier list is ⁇ 1, 2, 3, 5, 7, 9 ⁇ . If carrier #1 and carrier #4 trigger carrier selection, and carrier #1 meets condition 4, other carriers do not trigger carrier selection, and carrier #7 meets condition 3, then carrier #1 and carrier #7 can be used as candidate carriers.
  • the second terminal device may determine the candidate carrier according to the CBR of each carrier in the second carrier list measured by itself.
  • the second terminal device may determine the candidate carrier according to the CBR of each carrier in the second carrier list measured by itself and the first terminal device respectively.
  • Case 1 The first measurement result includes the second carrier list, but does not include the CBR of each carrier in the second carrier list.
  • the carrier is determined as a candidate carrier.
  • condition 5 is that the CBR of the carrier measured by the second terminal device is lower than the second CBR carrier selection threshold corresponding to the carrier.
  • the second carrier list is ⁇ 1, 2, 5 ⁇ . If carrier #1 and carrier #2 meet condition 5, and carrier #5 does not meet condition 5, then carrier #1 and carrier #2 can be used as candidate carriers.
  • the carrier is determined as a candidate carrier.
  • the carrier when there is sidelink authorization on some or all of the carriers in the second carrier list: for any carrier in the second carrier list that triggers carrier selection, if the carrier meets condition 6, the carrier is determined as a candidate carrier; for any carrier in the second carrier list that does not trigger carrier selection, if the carrier meets condition 5, the carrier is determined as a candidate carrier.
  • condition 6 is that the CBR of the carrier measured by the second terminal device is lower than the first CBR carrier retention threshold corresponding to the carrier.
  • the second carrier list is ⁇ 1, 7 ⁇ . If carrier #1 triggers carrier selection and carrier #1 meets condition 6, other carriers do not trigger carrier selection, and carrier #7 does not meet condition 5, then carrier #1 can be used as a candidate carrier.
  • Case 2 the first measurement result includes a second carrier list, and includes a CBR of each carrier in the second carrier list.
  • the carrier is determined as a candidate carrier.
  • condition 7 is that the average of the CBR of the carrier measured by the first terminal device and the CBR of the carrier measured by the second terminal device is lower than the first CBR carrier selection threshold corresponding to the carrier or the second CBR carrier selection threshold corresponding to the carrier.
  • the carrier is determined as a candidate carrier.
  • the carrier when there is a sidelink authorization on some or all of the carriers in the second carrier list: for any carrier in the second carrier list that triggers carrier selection, if the carrier meets condition 8, the carrier is determined as a candidate for any carrier in the second carrier list that does not trigger carrier selection, if the carrier meets condition 7, the carrier is determined as a candidate carrier.
  • condition 8 is that the average of the CBR of the carrier measured by the first terminal device and the CBR of the carrier measured by the second terminal device is lower than the first CBR carrier retention threshold corresponding to the carrier or the second CBR carrier retention threshold corresponding to the carrier.
  • case 2 the solution described for case 1 may also be used to determine the candidate carrier.
  • the first CBR carrier selection threshold and the second CBR carrier selection threshold corresponding to the carrier may be equal, and the first CBR carrier retention threshold and the second CBR carrier retention threshold corresponding to the carrier may be equal.
  • the second terminal device may determine the second CBR carrier selection threshold and/or the second CBR carrier retention threshold according to the priority of the data to be transmitted or the priority of the logical channel corresponding to the data.
  • the priority of the data to be transmitted or the priority of the logical channel corresponding to the data may be sent by the first terminal device to the second terminal device.
  • the first measurement result may include the priority of the data to be transmitted or the priority of the logical channel corresponding to the data.
  • the first terminal device may send the first CBR carrier selection threshold and/or the first CBR carrier retention threshold to the second terminal device.
  • the first measurement result may include the first CBR carrier selection threshold and/or the first CBR carrier retention threshold.
  • the second terminal device sends information about the candidate carrier to the first terminal device.
  • the first terminal device receives information about the candidate carrier from the second terminal device.
  • the second terminal device can determine the candidate carrier based on its own measurement result of the CBR of the carrier and the measurement result of the CBR of the carrier by the first terminal device, and inform the first terminal device of the information of the candidate carrier.
  • the candidate carrier is applicable to both the first terminal device and the second terminal device as much as possible, which is conducive to ensuring normal sidelink communication.
  • the first terminal device may use some of the candidate carriers, such as using only a certain candidate carrier to send data to the second terminal device.
  • the method may further include:
  • the first terminal device determines a target carrier from the candidate carriers.
  • the first terminal device may select a target carrier in ascending order of the CBR of the candidate carriers.
  • the first terminal device may select a carrier with the highest CBR measured by the first terminal device among the candidate carriers as the target carrier.
  • S580 The first terminal device sends target carrier information to the second terminal device.
  • the first terminal device may send an identifier of the target carrier to the second terminal device.
  • the first terminal device can select resources from the target carrier to transmit the data to be sent.
  • the method described above involves the concept of CBR of a carrier.
  • the following is an example of how to determine the CBR of a carrier.
  • Each carrier may be associated with a candidate resource pool, and the CBR of the candidate resource pool is used as the CBR of the carrier associated with the candidate resource pool.
  • the first terminal device can determine the candidate resource pool associated with each carrier in the first carrier list by itself, or the network device can configure the candidate resource pool associated with each carrier in the first carrier list to the first terminal device.
  • the first terminal device can notify the second terminal device of the candidate resource pool associated with each carrier in the first carrier list. If the first carrier list is determined by the second terminal device, the second terminal device can determine the candidate resource pool associated with each carrier in the first carrier list by itself, or the network device can configure the candidate resource pool associated with each carrier in the first carrier list to the second terminal device. In addition, the second terminal device can notify the first terminal device of the candidate resource pool associated with each carrier in the first carrier list.
  • Example 2 The first terminal device or the second terminal device uses the CBR of the maximum or minimum resource pool on the carrier as the CBR carrier of the carrier where the resource pool is located.
  • Example 3 The first terminal device or the second terminal device uses the average of the CBRs of the first N larger or smaller resource pools on the carrier as the CBR of the carrier where the resource pool is located.
  • the CBR of a carrier is determined by the ratio of sub-channels that meet the RSSI threshold in all resource pools on the carrier. For example, the ratio of sub-channels that meet the RSSI threshold in all resource pools on a carrier can be used as the CBR of the carrier. It should be understood that a resource pool includes L consecutive sub-channels in the frequency domain.
  • resource pools on carrier 1 are resource pool 1, resource pool 2, and resource pool 3, and resource pool 1, resource pool 2, and resource pool 3 include 3, 4, and 6 subchannels in the frequency domain, respectively. If one of the three subchannels of resource pool 1 is greater than the received signal strength indicator (RSSI) threshold, two of the four subchannels of resource pool 2 are greater than the RSSI threshold, and none of the six subchannels of resource pool 3 is greater than the RSSI threshold, then the ratio of subchannels that meet the RSSI threshold in all resource pools on carrier 1 is 0.83 (i.e., 0.33+0.5), and the CBR of carrier 1 is 0.83.
  • RSSI received signal strength indicator
  • Example 5 The CBR of a carrier is calculated by taking the weighted average of the CBRs of each resource pool on the carrier.
  • the weight of the CBR of any resource pool can be determined in the following two ways:
  • resource pool 1 there are two resource pools on a carrier, namely, resource pool 1 and resource pool 2, where resource pool 1 has 2 subchannels and resource pool 2 has 3 subchannels.
  • the weight of the CBR of resource pool 1 is 0.4
  • the weight of the CBR of resource pool 2 is 0.6
  • the CBR of the carrier (CBR of resource pool 1*0.4+CBR of resource pool 2*0.6)/2.
  • Example 6 Define a CBR measurement method for carrier granularity.
  • the network device provides a set of parameters for measuring the CBR of carrier granularity.
  • the basic principle is also to calculate the ratio of the number of subchannels exceeding a certain threshold to the number of all configured subchannels. These parameters may include:
  • Measurement threshold If a subchannel is measured to have an RSSI exceeding a (pre-configured) threshold, the subchannel is considered occupied.
  • the measurement threshold here refers to the RSSI threshold, and other measurement values may be considered, such as RSRP and RSRQ.
  • the starting RB position of the subchannel is the starting RB position of the carrier, covering the frequency band of the entire carrier.
  • the so-called coverage means that the subchannel should be distributed in all positions of the carrier spectrum bandwidth.
  • the subchannels for measuring the CBR of the carrier are continuous or intermittent in the frequency domain.
  • the interval setting can be N subchannels or N RBs. The value of N is a small integer.
  • FIG. 7 is a schematic block diagram of a communication device provided in an embodiment of the present application.
  • the communication device 2000 may include a communication unit 2100 and a processing unit 2200.
  • the communication unit 2100 can implement corresponding communication functions, and the communication can be internal communication of the communication device 2000 or communication between the communication device 2000 and other devices, such as receiving or sending measurement results; the processing unit 2200 can implement corresponding processing functions, such as measuring the CBR of a carrier or determining a candidate carrier.
  • the communication unit 2100 can also be referred to as a communication interface or a transceiver unit.
  • the communication device 2000 may also include a storage unit, which can be used to store instructions and/or data, and the processing unit 2200 can read the instructions and/or data in the storage unit so that the device implements the aforementioned method embodiment.
  • the communication device 2000 may be the first terminal device in any of the above method embodiments, or may be a module or chip applied to the first terminal device.
  • the communication device 2000 may be used to execute the steps or processes executed by the first terminal device in any of the above method embodiments.
  • the communication device 2000 may correspond to the first terminal device in the above method 200, method 300, or method 400, and may execute the steps or processes executed by the first terminal device in method 200, method 300, or method 400.
  • the communication unit 2100 is used to receive a first measurement result from a second terminal device, the first measurement result includes a channel busy rate CBR of each carrier in a first carrier list measured by the second terminal device, or the first measurement result includes a second carrier list, the second carrier list is composed of at least one first carrier in the first carrier list, and the CBR of the first carrier measured by the second terminal device is lower than the corresponding CBR threshold;
  • the processing unit 2200 is used to determine a candidate carrier based on the first measurement result and the second measurement result, the second measurement result includes the CBR of each carrier in the first carrier list measured by the communication device 2000, or the second measurement result includes the CBR of each carrier in the second carrier list measured by the communication device 2000, and the candidate carrier is used to send data through the communication device 2000 through a side link between the second terminal device and the second terminal device.
  • the first carrier list is a carrier list configured by an upper layer of the communication device 2000, a carrier list supported by a network, a carrier list supported by the communication device 2000, or an intersection of any two or three of the foregoing; and Element 2200 is also used to determine the first carrier list; communication unit 2100 is also used to send the first carrier list to the second terminal device.
  • the first carrier list is a carrier list supported by both the communication device 2000 and the second terminal device; and the communication unit 2100 is also used to send a configuration message to the second terminal device, the configuration information including the first carrier list and a feedback cycle, the configuration message being used by the second terminal device to periodically feed back the CBR of each carrier in the first carrier list according to the feedback cycle; the communication unit 2100 is specifically used to: receive the first measurement result fed back by the second terminal device according to the feedback cycle.
  • the first carrier list is a carrier list configured by an upper layer of the second terminal device, a carrier list supported by the network, a carrier list supported by the second terminal device, or an intersection of any two or three of the foregoing.
  • the first measurement result includes the CBR of each carrier in the first carrier list measured by the second terminal device; wherein the processing unit 2200 is specifically used to: for any carrier in the first carrier list, if the carrier satisfies the first condition, determine the carrier as the candidate carrier; or, if there is no sidelink authorization on all carriers in the first carrier list, for any carrier in the first carrier list, if the carrier satisfies the first condition, determine the carrier as the candidate carrier; or, if there is a sidelink authorization on some or all of the carriers in the first carrier list, for any carrier in the first carrier list that triggers carrier selection, if the carrier satisfies the second condition, determine the carrier as the candidate carrier, and for any carrier in the first carrier list that does not trigger carrier selection, if the carrier satisfies the first condition, determine the carrier as the candidate carrier; wherein the first condition is the carrier measured by the communication device 2000.
  • the CBR of the carrier is lower than the first CBR carrier selection threshold corresponding to the carrier, and the CBR of the carrier measured by the second terminal device is lower than the second CBR carrier selection threshold corresponding to the carrier, or, the first condition is that the average of the CBR of the carrier measured by the communication device 2000 and the CBR of the carrier measured by the second terminal device is lower than the first CBR carrier selection threshold corresponding to the carrier or the second CBR carrier selection threshold corresponding to the carrier; the second condition is that the CBR of the carrier measured by the communication device 2000 is lower than the first CBR carrier retention threshold corresponding to the carrier, and the CBR of the carrier measured by the second terminal device is lower than the second CBR carrier retention threshold corresponding to the carrier, or, the second condition is that the average of the CBR of the carrier measured by the communication device 2000 and the CBR of the carrier measured by the second terminal device is lower than the first CBR carrier retention threshold corresponding to the carrier or the second CBR carrier retention threshold corresponding to the carrier.
  • the first measurement result includes a second carrier list; wherein the processing unit 2200 is specifically used to: for any carrier in the second carrier list, when the carrier satisfies the first condition, determine the carrier as the candidate carrier; or, when there is no sidelink authorization on all carriers in the second carrier list, for any carrier in the second carrier list, when the carrier satisfies the first condition, determine the carrier as the candidate carrier; or, when there is a sidelink authorization on some or all of the carriers in the second carrier list, for any carrier in the second carrier list that triggers carrier selection, when the carrier satisfies the second condition, determine the carrier as the candidate carrier, and for any carrier in the second carrier list that does not trigger carrier selection, when the carrier satisfies the first condition, determine the carrier as the candidate carrier; wherein the first condition is that the CBR of the carrier measured by the communication device 2000 is lower than the first CBR carrier selection threshold corresponding to the carrier; the second condition is that the CBR of the carrier measured by the communication device 2000 is lower than the first CBR carrier
  • the first measurement result also includes a CBR of each carrier in the second carrier list.
  • the processing unit 2200 is specifically used to: for any carrier in the second carrier list, if the carrier satisfies the first condition, determine the carrier as the candidate carrier; or, if there is no sidelink authorization on all carriers in the second carrier list, for any carrier in the second carrier list, if the carrier satisfies the first condition, determine the carrier as the candidate carrier; or, if there is a sidelink authorization on some or all of the carriers in the second carrier list, for any carrier in the second carrier list that triggers carrier selection, if the carrier satisfies the second condition, determine the carrier as the candidate carrier, and for any carrier in the second carrier list that does not trigger carrier selection, if the carrier satisfies the first condition, determine the carrier as the candidate carrier; wherein the first condition is that the average of the CBR of the carrier measured by the communication device 2000 and the CBR of the carrier measured by the second terminal device is lower than the first CBR carrier selection threshold corresponding to the carrier or the second CBR carrier selection threshold corresponding to the carrier; the second condition
  • the first measurement result also includes the second CBR carrier selection threshold and/or the second CBR carrier retention threshold.
  • the communication unit 2100 is also used to send the priority of the data or the priority of the logical channel corresponding to the data to the second terminal device, and the priority of the data or the priority of the logical channel corresponding to the data is used by the second terminal device to determine the second CBR carrier selection threshold and/or the second CBR carrier retention threshold.
  • the communication unit 2100 is further used to send the second CBR carrier selection threshold and/or the second CBR carrier retention threshold to the second terminal device.
  • the communication device 2000 may correspond to the first terminal device in the above method 500, and may execute the steps or processes executed by the first terminal device in the method 500.
  • the processing unit 2200 is used to measure the CBR of each carrier in the first carrier list, where the first carrier list is a carrier list configured by the upper layer of the communication device 2000, a carrier list supported by the network, a carrier list supported by the communication device 2000, or an intersection of any two or three of the foregoing; the communication unit 2100 is used to send a first measurement result to the second terminal device, where the first measurement result includes the CBR of each carrier in the first carrier list, or the first measurement result includes a second carrier list, where the second carrier list is composed of at least one first carrier in the first carrier list, and the CBR of the first carrier measured by the communication device 2000 is lower than the corresponding CBR threshold; the communication unit 2100 is also used to receive information about a candidate carrier from the second terminal device, where the candidate carrier is obtained by the second terminal device based on the first measurement result and the CBR measurement of each carrier in the first carrier list or the second carrier list by the second terminal device, and the candidate carrier is used to send data through the side link between the communication device 2000 and
  • the processing unit 2200 is also used to: for any carrier in the first carrier list, if the carrier satisfies the first condition, determine the carrier as the first carrier; or, if there is no sidelink authorization on all carriers in the first carrier list, for any carrier in the first carrier list, if the carrier satisfies the first condition, determine the carrier as the first carrier; or, if there is a sidelink authorization on some or all of the carriers in the first carrier list, for any carrier in the first carrier list that triggers carrier selection, if the carrier satisfies the second condition, determine the carrier as the first carrier, and for any carrier in the first carrier list that does not trigger carrier selection, if the carrier satisfies the first condition, determine the carrier as the first carrier; wherein the first condition is that the CBR of the carrier measured by the communication device 2000 is lower than the first CBR carrier selection threshold corresponding to the carrier; the second condition is that the CBR of the carrier measured by the communication device 2000 is lower than the first CBR carrier retention threshold corresponding to the carrier
  • the first measurement result also includes a CBR of each carrier in the second carrier list.
  • the first measurement result also includes one or more of the following threshold information: a first CBR carrier selection threshold, a first CBR carrier retention threshold, a second CBR carrier selection threshold, or a second CBR carrier retention threshold, and the threshold information is used by the second terminal device to determine the candidate carrier.
  • a first CBR carrier selection threshold a first CBR carrier retention threshold
  • a second CBR carrier selection threshold a second CBR carrier retention threshold
  • the threshold information is used by the second terminal device to determine the candidate carrier.
  • the first measurement result also includes the priority of the data or the priority of the logical channel corresponding to the data, and the priority of the data or the priority of the logical channel corresponding to the data is used by the second terminal device to determine a second CBR carrier selection threshold and/or a second CBR carrier retention threshold, and the second CBR carrier selection threshold and/or the second CBR carrier retention threshold is used by the second terminal device to determine the candidate carrier.
  • the communication device 2000 may be the second terminal device in any of the above method embodiments, or may be a module or chip applied to the second terminal device.
  • the communication device 2000 may be used to execute the steps or processes executed by the second terminal device in any of the above method embodiments.
  • the communication device 2000 may correspond to the second terminal device in the above method 200, method 300, or method 400, and may execute the steps or processes executed by the second terminal device in method 200, method 300, or method 400.
  • the processing unit 2200 is used to determine a first measurement result, wherein the first measurement result includes a channel busy rate CBR of each carrier in the first carrier list measured by the communication device 2000, or the first measurement result includes a second carrier list, the second carrier list is composed of at least one first carrier in the first carrier list, and the CBR of the first carrier measured by the communication device 2000 is lower than the corresponding CBR threshold; the communication unit 2100 is used to send the first measurement result to the first terminal device, the first measurement result is used by the first terminal device to determine a candidate carrier, and the candidate carrier is used to send data through the first terminal device through the side link between the communication device 2000.
  • the first measurement result includes a channel busy rate CBR of each carrier in the first carrier list measured by the communication device 2000, or the first measurement result includes a second carrier list, the second carrier list is composed of at least one first carrier in the first carrier list, and the CBR of the first carrier measured by the communication device 2000 is lower than the corresponding CBR threshold;
  • the communication unit 2100 is used to send the
  • the first carrier list is a carrier list configured by the upper layer of the first terminal device, a carrier list supported by the network, a carrier list supported by the first terminal device, or an intersection of any two or three of the foregoing; and the communication unit 2100 is also used to receive the first carrier list from the first terminal device.
  • the first carrier list is a carrier list supported by both the first terminal device and the communication device 2000; and the communication unit 2100 is also used to receive a configuration message from the first terminal device, the configuration message including the first carrier list and a feedback cycle, the configuration message being used by the communication device 2000 to periodically feedback the CBR of each carrier in the first carrier list according to the feedback cycle; the communication unit 2100 is specifically used to send the first measurement result to the first terminal device according to the feedback cycle.
  • the first carrier list is a carrier list configured by an upper layer of the communication device 2000, a carrier list supported by a network, a carrier list supported by the communication device 2000, or an intersection of any two or three of the foregoing.
  • the first measurement result also includes a CBR of each carrier in the second carrier list.
  • the processing unit 2200 is specifically used to: measure the CBR of each carrier in the first carrier list; for any carrier in the first carrier list, when the carrier satisfies the third condition, determine the carrier as the first carrier; or, when there is no sidelink authorization on all carriers in the first carrier list, for any carrier in the first carrier list, when the carrier satisfies the third condition, determine the carrier as the first carrier; or, when there is a sidelink authorization on some or all of the carriers in the first carrier list, for any carrier in the first carrier list that triggers carrier selection, when the carrier satisfies the fourth condition, determine the carrier as the first carrier, and for any carrier in the first carrier list that does not trigger carrier selection, when the carrier satisfies the third condition, determine the carrier as the first carrier; wherein the third condition is that the CBR of the carrier measured by the communication device 2000 is lower than the second CBR carrier selection threshold corresponding to the carrier; the fourth condition is that the CBR of the carrier measured by the communication device 2000 is lower than the second CBR carrier
  • the first measurement result also includes the second CBR carrier selection threshold and/or the second CBR carrier retention threshold.
  • the communication unit 2100 is also used to receive the priority of the data or the priority of the logical channel corresponding to the data from the first terminal device; the processing unit 2200 is also used to determine the second CBR carrier selection threshold and/or the second CBR carrier retention threshold based on the priority of the data or the priority of the logical channel corresponding to the data.
  • the communication unit 2100 is further used to receive the second CBR carrier selection threshold and/or the second CBR carrier retention threshold from the first terminal device.
  • the communication apparatus 2000 may correspond to the second terminal device in the above method 500, and may execute the steps or processes executed by the second terminal device in the method 500.
  • the communication unit 2100 is used to receive a first measurement result from a first terminal device, where the first measurement result includes the CBR of each carrier in the first carrier list measured by the first terminal device, or the first measurement result includes a second carrier list, where the first carrier list is a carrier list configured by the upper layer of the first terminal device, a carrier list supported by the network, a carrier list supported by the first terminal device, or an intersection of any two or three of the foregoing, and the second carrier list is composed of at least one first carrier in the first carrier list, and the CBR of the first carrier measured by the first terminal device is lower than the corresponding CBR threshold; the processing unit 2200 is used to measure the CBR of each carrier in the first carrier list or the second carrier list to obtain a second measurement result; the processing unit 2200 is also used to determine a candidate carrier based on the first measurement result and the second measurement result, and the candidate carrier is used to send data through the first terminal device through the side link between the communication device 2000; the communication unit 2100 is also used to send information about the
  • the first measurement result includes a CBR of each carrier in the first carrier list; wherein the processing unit 2200 is specifically configured to: for any carrier in the first carrier list, when the carrier satisfies a third condition, determine the carrier as the candidate carrier; or, when there is no sidelink authorization on all carriers in the first carrier list, For any carrier in the first carrier list, when the carrier satisfies the third condition, the carrier is determined as the candidate carrier; or, when there is a sidelink authorization on some or all of the carriers in the first carrier list, for any carrier in the first carrier list that has triggered carrier selection, when the carrier satisfies the fourth condition, the carrier is determined as the candidate carrier, and for any carrier in the first carrier list that has not triggered carrier selection, when the carrier satisfies the third condition, the carrier is determined as the candidate carrier; wherein the third condition is that the CBR of the carrier measured by the first terminal device is lower than the first CBR carrier selection threshold corresponding to the carrier, and the CBR of the carrier measured by the communication device
  • the first measurement result also includes a CBR of each carrier in the second carrier list.
  • the first measurement result includes the second carrier list; wherein the processing unit 2200 is specifically used to: for any carrier in the second carrier list, when the carrier satisfies the third condition, determine the carrier as the candidate carrier; or, when there is no sidelink authorization on all carriers in the second carrier list, for any carrier in the second carrier list, when the carrier satisfies the third condition, determine the carrier as the candidate carrier; or, when there is a sidelink authorization on some or all of the carriers in the second carrier list, for any carrier in the second carrier list that triggers carrier selection, when the carrier satisfies the fourth condition, determine the carrier as the candidate carrier, and for any carrier in the second carrier list that does not trigger carrier selection, when the carrier satisfies the third condition, determine the carrier as the candidate carrier; wherein the third condition is that the CBR of the carrier measured by the communication device 2000 is lower than the second CBR carrier selection threshold corresponding to the carrier; the fourth condition is that the CBR of the carrier measured by the communication device 2000 is lower than the second CBR carrier retention
  • the processing unit 2200 is specifically used to: for any carrier in the second carrier list, if the carrier satisfies the third condition, determine the carrier as the candidate carrier; or, if there is no sidelink authorization on all carriers in the second carrier list, for any carrier in the second carrier list, if the carrier satisfies the third condition, determine the carrier as the candidate carrier; or, if there is a sidelink authorization on some or all of the carriers in the second carrier list, for any carrier in the second carrier list that triggers carrier selection, if the carrier satisfies the fourth condition, determine the carrier as the candidate carrier, for the second carrier list For any carrier in the table that does not trigger carrier selection, if the carrier satisfies the third condition, the carrier is determined as the candidate carrier; wherein the third condition is that the average of the CBR of the carrier measured by the first terminal device and the CBR of the carrier measured by the communication device 2000 is lower than the first CBR carrier selection threshold corresponding to the carrier or the second CBR carrier selection threshold corresponding to the carrier;
  • the first measurement result further includes one or more of the following: the first CBR carrier selection threshold, the first CBR carrier retention threshold, the second CBR carrier selection threshold, or the second CBR carrier retention threshold.
  • the first measurement result also includes the priority of the data or the priority of the logical channel corresponding to the data; and the processing unit 2200 is also used to determine the second CBR carrier selection threshold and/or the second CBR carrier retention threshold based on the priority of the data or the priority of the logical channel corresponding to the data.
  • the "unit" in the communication device 2000 can be implemented by hardware, can be implemented by software, and can also be implemented by hardware executing the corresponding software.
  • the "unit” can refer to an application specific integrated circuit (ASIC), an electronic circuit, a processor (such as a shared processor, a dedicated processor or a group processor, etc.) and a memory for executing one or more software or firmware programs, a combined logic circuit and/or other suitable components that support the described functions.
  • the communication unit 2100 can be replaced by a transceiver transceiver circuit (for example, it can include a receiving circuit and a transmitting circuit), and the processing unit 2200 may be replaced by a processor or a processing circuit.
  • FIG8 shows a schematic block diagram of another communication device 3000 provided in an embodiment of the present application.
  • the device 3000 may be a first terminal device, or a second terminal device, or a chip, a chip system, or a processor that supports the first terminal device to implement the above method, or a chip, a chip system, or a processor that supports the second terminal device to implement the above method.
  • the device may be used to implement the method described in the above method embodiment, and the details may refer to the description in the above method embodiment.
  • the device 3000 may include one or more processors 3100, which may also be referred to as processing units, and may implement certain control functions.
  • the processor 3100 may be a general-purpose processor or a dedicated processor, etc. For example, it may be a baseband processor or a central processing unit.
  • the baseband processor may be used to process communication protocols and communication data
  • the central processing unit may be used to control a communication device (e.g., a base station, a baseband chip, a user chip, a DU or a CU, etc.), execute a software program, and process the data of the software program.
  • the processor 3100 may also store instructions and/or data, which can be executed by the processor 3100 so that the device 3000 executes the method described in the above method embodiment.
  • the device 3000 may include a transceiver 3200 for implementing the receiving and sending functions.
  • the transceiver 3200 may be a transceiver circuit, or an interface, or an interface circuit.
  • the transceiver circuit, interface, or interface circuit for implementing the receiving and sending functions may be separate or integrated.
  • the above-mentioned transceiver circuit, interface, or interface circuit may be used for reading and writing code/data, or the above-mentioned transceiver circuit, interface, or interface circuit may be used for transmitting or delivering signals.
  • the apparatus 3000 may include a circuit that can implement the functions of sending, receiving, or communicating in the aforementioned method embodiments.
  • the device 3000 may include one or more memories 3300, on which instructions may be stored, and the instructions may be executed on the processor 3100, so that the device 3000 performs the method described in the above method embodiment.
  • data may also be stored in the memory 3300.
  • instructions and/or data may also be stored in the processor 3100.
  • the processor 3100 and the memory 3300 may be provided separately or integrated together.
  • FIG9 is a schematic diagram of the structure of a terminal device 4000 provided by the present application.
  • the above-mentioned communication device 2000 or communication device 3000 can be configured in the terminal device 4000.
  • the communication device 2000 or communication device 3000 itself can be the terminal device 4000.
  • the terminal device 4000 can perform the actions performed by the terminal device in the above-mentioned method embodiment.
  • FIG9 only shows the main components of the terminal device.
  • the terminal device 4000 includes a processor, a memory, a control circuit, an antenna, and an input and output device.
  • the processor is mainly used to process the communication protocol and communication data, as well as to control the entire terminal device, execute the software program, and process the data of the software program, for example, to support the terminal device to perform the actions described in the above method embodiment.
  • the memory is mainly used to store software programs and data.
  • the control circuit is mainly used for the conversion of baseband signals and radio frequency signals and the processing of radio frequency signals.
  • the control circuit and the antenna can also be called a transceiver, which is mainly used to send and receive radio frequency signals in the form of electromagnetic waves.
  • Input and output devices such as touch screens, display screens, keyboards, etc. are mainly used to receive data input by users and output data to users.
  • the processor can read the software program in the storage unit, interpret and execute the instructions of the software program, and process the data of the software program.
  • the processor performs baseband processing on the data to be sent, and outputs the baseband signal to the RF circuit.
  • the RF circuit performs RF processing on the baseband signal and then sends the RF signal outward in the form of electromagnetic waves through the antenna.
  • the RF circuit receives the RF signal through the antenna, converts the RF signal into a baseband signal, and outputs the baseband signal to the processor.
  • the processor converts the baseband signal into data and processes the data.
  • FIG9 shows only one memory and processor.
  • the memory may also be referred to as a storage medium or a storage device, etc., which is not limited in the embodiments of the present application.
  • the processor may include a baseband processor and a central processing unit.
  • the baseband processor is mainly used to process the communication protocol and communication data
  • the central processing unit is mainly used to control the entire terminal device, execute the software program, and process the data of the software program.
  • the processor in Figure 9 integrates the functions of the baseband processor and the central processing unit.
  • the baseband processor and the central processing unit may also be independent processors, interconnected by technologies such as buses.
  • the terminal device may include multiple baseband processors to adapt to different network formats, and the terminal device may include multiple central processing units to enhance its processing capabilities.
  • the various components of the terminal device may be connected through various buses.
  • the baseband processor may also be described as a baseband processing circuit or a baseband processing chip.
  • the central processing unit may also be described as a central processing circuit or a central processing chip.
  • the function of processing the communication protocol and the communication data may be built into the processor, or may be stored in the storage unit in the form of a software program, and the processor executes the software program to implement the baseband processing function.
  • the antenna and the control circuit with transceiver functions may be regarded as the transceiver unit 4100 of the terminal device 4000, and the processor with processing functions may be regarded as the processing unit 4200 of the terminal device 4000.
  • the terminal device 4000 includes a transceiver unit 4100 and a processing unit 4200.
  • the transceiver unit may also be referred to as a transceiver, a transceiver, a transceiver device, etc.
  • the device for implementing the receiving function in the transceiver unit 4100 may be regarded as a receiving unit, and the device for implementing the sending function in the transceiver unit 4100 may be regarded as a sending unit, that is, the transceiver unit 4100 includes a receiving unit and a sending unit.
  • the receiving unit may also be referred to as a receiver, a receiver, a receiving circuit, etc.
  • the sending unit may be referred to as a transmitter, a transmitter, or a sending circuit, etc.
  • each step in the method embodiment provided by the present application can be completed by an integrated logic circuit of hardware in a processor or an instruction in the form of software.
  • the steps of the method disclosed in conjunction with the embodiment of the present application can be directly embodied as a hardware processor executing, or a combination of hardware and software modules in a processor executing.
  • the software module can be located in a storage medium mature in the art such as a random access memory, a flash memory, a read-only memory, a programmable read-only memory or an electrically erasable programmable memory, a register, etc.
  • the storage medium is located in a memory, and the processor reads the information in the memory and completes the steps of the above method in conjunction with its hardware. To avoid repetition, it is not described in detail here.
  • the processor in the embodiment of the present application can be an integrated circuit chip with signal processing capabilities.
  • each step of the above method embodiment can be completed by an integrated logic circuit of hardware in the processor or an instruction in the form of software.
  • the above processor can be a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components.
  • DSP digital signal processor
  • ASIC application-specific integrated circuit
  • FPGA field programmable gate array
  • the methods, steps and logic block diagrams disclosed in the embodiments of the present application can be implemented or executed.
  • the general-purpose processor can be a microprocessor or the processor can also be any conventional processor, etc.
  • the steps of the method disclosed in the embodiment of the present application can be directly embodied as a hardware decoding processor to perform, or the hardware and software modules in the decoding processor can be combined and performed.
  • the software module can be located in a mature storage medium in the field such as a random access memory, a flash memory, a read-only memory, a programmable read-only memory or an electrically erasable programmable memory, a register, etc.
  • the storage medium is located in a memory, and the processor reads the information in the memory and completes the steps of the above method in combination with its hardware.
  • the memory in the embodiments of the present application can be a volatile memory or a non-volatile memory, or can include both volatile and non-volatile memories.
  • the non-volatile memory can be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), or a flash memory.
  • the volatile memory can be a random access memory (RAM), which is used as an external cache.
  • RAM random access memory
  • SRAM static RAM
  • DRAM dynamic RAM
  • SDRAM synchronous DRAM
  • DDR SDRAM double data rate SDRAM
  • ESDRAM enhanced SDRAM
  • SLDRAM synchlink DRAM
  • DR RAM direct rambus RAM
  • the present application also provides a computer program product, which includes: computer program code, when the computer program code is run on a computer, the computer executes each step or process executed by the first terminal device or the second terminal device in any of the above method embodiments.
  • the present application also provides a computer-readable storage medium, which stores program code.
  • the program code runs on a computer, the computer executes each step or process executed by the first terminal device or the second terminal device in any of the above method embodiments.
  • the present application also provides a communication system, which includes a first terminal device and/or a second terminal device.
  • the transceiver unit or transceiver executes the receiving or sending steps in the method embodiment, and the other steps except sending and receiving can be executed by the processing unit or processor.
  • a component can be, but is not limited to, a process running on a processor, a processor, an object, an executable file, an execution thread, a program and/or a computer.
  • applications running on a computing device and a computing device can be components.
  • One or more components may reside in a process and/or an execution thread, and a component may be located on a computer and/or distributed between two or more computers.
  • these components may be executed from various computer-readable storage media having various data structures stored thereon.
  • Components may, for example, communicate through local and/or remote processes according to signals having one or more data packets (e.g., data from two components interacting with another component between a local system, a distributed system and/or a network, such as the Internet interacting with other systems through signals).
  • signals having one or more data packets (e.g., data from two components interacting with another component between a local system, a distributed system and/or a network, such as the Internet interacting with other systems through signals).
  • the disclosed systems, devices and methods can be implemented in other ways.
  • the device embodiments described above are only schematic.
  • the division of the units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed.
  • Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.
  • the units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
  • each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.
  • each functional unit can be implemented in whole or in part by software, hardware, firmware or any combination thereof.
  • software When implemented using software, it can 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 (programs). When the computer program instructions (programs) are loaded and executed on a computer, the process or function described in the embodiment of the present application is generated in whole or in part.
  • the computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices.
  • the computer instructions can 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 can be transmitted from a website site, computer, server or data center by wired (e.g., coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) mode to another website site, computer, server or data center.
  • the computer-readable storage medium can be any available medium that a computer can access or a data storage device such as a server or data center that contains one or more available media integrations.
  • the available medium may be a magnetic medium (e.g., a floppy disk, a hard disk, a magnetic tape), an optical medium (e.g., a DVD), or a semiconductor medium (e.g., a solid state disk (SSD)), etc.
  • a magnetic medium e.g., a floppy disk, a hard disk, a magnetic tape
  • an optical medium e.g., a DVD
  • a semiconductor medium e.g., a solid state disk (SSD)
  • the computer software product is stored in a storage medium and includes several instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the methods described in the various embodiments of the present application.
  • the aforementioned storage medium includes: various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

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Abstract

本申请提供了一种通信方法和通信装置，涉及通信领域。该方法中，第二终端设备向第一终端设备发送第一测量结果，第一终端设备可以根据第一测量结果和第二测量结果，确定候选载波。其中，第一测量结果包括第二终端设备测量得到的第一载波列表中每个载波的CBR，第二测量结果包括第一终端设备测量得到的第一载波列中每个载波的CBR。或者，第一测量结果包括由第一载波列表中的CBR低于对应的CBR阈值的载波构成的第二载波列表，第二测量结果包括第一终端设备测量得到的第二载波列表中每个载波的CBR。该方法通过结合基于侧行链路通信的两个终端设备对载波的CBR的测量结果，选择候选载波，有利于保证正常的侧行链路通信。

Description

通信方法和通信装置
本申请要求于2022年09月30日提交国家知识产权局、申请号为202211231231.4、申请名称为“通信方法和通信装置”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及通信技术领域，尤其涉及一种通信方法和通信装置。
背景技术
车联网(vehicle to everything，V2X)系统支持多载波传输。一般地，在传输之前，发送端需要先选择候选载波，然后再从候选载波中选择合适的载波进行传输。具体地，发送端首先通过测量根据待发送业务确定的可用载波列表中的载波的信道忙碌率(channel busy ratio，CBR)，将可用载波列表中载波的CBR低于对应的CBR阈值的载波作为候选载波，再根据候选载波的CBR选择载波传输待传输业务。
在新无线(new radio，NR)V2X中，侧行链路(sidelink，SL)传输不仅有广播业务还有单播和组播业务，其中单播和组播业务需要保证对端的通信质量。那么，如果发送端选择的候选载波不适用于接收端，可能导致接收端接收失败。
发明内容
本申请提供了一种通信方法和通信装置，通过结合基于侧行链路通信的两个终端设备对载波的CBR的测量结果，选择候选载波，有利于保证正常的侧行链路通信。
第一方面，提供了一种切换方法，该方法可以由第一终端设备执行，也可以由第一终端设备的部件(例如处理器、芯片、或芯片系统等)执行，还可以由能实现全部或部分第一终端设备功能的逻辑模块或软件实现。其中，第一终端设备为数据的发送方。
该方法包括：接收来自第二终端设备的第一测量结果，根据第一测量结果和第二测量结果，确定候选载波。其中，第一测量结果包括第二终端设备测量得到的第一载波列表中每个载波的信道繁忙率(channel busy ratio，CBR)，第二测量结果包括第一终端设备测量得到的第一载波列中每个载波的CBR。或者，第一测量结果包括第二载波列表，第二载波列表由第一载波列表中的至少一个第一载波构成，第二终端设备测量到的第一载波的CBR低于对应的CBR阈值。第二测量结果包括第一终端设备测量得到的第二载波列表中每个载波的CBR。其中，候选载波用于通过第一终端设备通过与第二终端设备之间的侧行链路发送数据。
根据本申请提供的通信方法，第二终端设备可以对载波的CBR进行测量，然后将测量结果反馈给第一终端设备。第一终端设备可以结合自己和第二终端设备对载波的CBR的测量结果，选择候选载波。这样，能够尽可能保证所选择的候选载波对第一终端设备和第二终端设备都适用，从而有利于保证正常的侧行链路通信。
在一种可能的实现方式中，在接收来自第二终端设备的第一测量结果之前，该方法还包括：确定第一载波列表；向第二终端设备发送第一载波列表。其中，第一载波列表为第一终端设备上层配置的载波列表、网络能够支持的载波列表、第一终端设备能够支持的载波列表、或者前述任意两种或三种的交集。
在一种可能的实现方式中，第一载波列表为第一终端设备和第二终端设备均支持的载波列表；以及，在接收来自第二终端设备的第一测量结果之前，方法还包括：向第二终端设备发送配置消息，配置消息包括第一载波列表和反馈周期，配置消息用于第二终端设备根据反馈周期周期性的反馈第一载波列表中每个载波的CBR；其中，接收来自第二终端设备的第一测量结果，包括：接收第二终端设备根据反馈周期反馈的第一测量结果。
在一种可能的实现方式中，第一载波列表为第二终端设备上层配置的载波列表、网络能够支持的载波列表、第二终端设备能够支持的载波列表、或者前述任意两种或三种的交集。
在一种可能的实现方式中，第一测量结果包括第二终端设备测量得到的第一载波列表中每个载波的CBR。其中，根据第一测量结果和第二测量结果，确定候选载波，包括：对于第一载波列表中的任一载波，在该载波满足第一条件的情况下，将该载波确定为候选载波；或者，在第一载波列表的所有载波上都没有侧行链路授权的情况下，对于第一载波列表中的任一载波，在该载波满足第一条件的情况下，将该载波确定为候选载波；或者，在第一载波列表中的部分或全部载波上有侧行链路授权的情况下，对于第一载波列表中触发了载波选择的任一载波，在该载波满足第二条件的情况下，将该载波确定为候选载波，对于第一载波列表中未触发载波选择的任一载波，在该载波满足第一条件的情况下，将该载波确定为候选载波。其中，第一条件为第一终端设备测量得到的载波的CBR低于载波对应的第一CBR载波选择阈值，且第二终端设备测量得到的载波的CBR低于载波对应的第二CBR载波选择阈值，或者，第一条件为第一终端设备测量得到的载波的CBR和第二终端设备测量得到的载波的CBR的均值低于载波对应的第一CBR载波选择阈值或载波对应的第二CBR载波选择阈值。第二条件为第一终端设备测量得到的载波的CBR低于载波对应的第一CBR载波保留阈值，且第二终端设备测量得到的载波的CBR低于载波对应的第二CBR载波保留阈值，或者，第二条件为第一终端设备测量得到的载波的CBR和第二终端设备测量得到的载波的CBR的均值低于载波对应的第一CBR载波保留阈值或载波对应的第二CBR载波保留阈值。
基于该方案，通过选择第一终端设备和第二终端设备测量到的CBR都低于对应的CBR载波选择/保留阈值的载波作为候选载波，或者，通过选择第一终端设备和第二终端设备测量到的CBR的均值低于对应的CBR载波选择/保留阈值的载波作为候选载波，能够保证候选载波既适用于第一终端设备，也适用于第二终端设备，从而能够保证正常的侧行链路通信。
在一种可能的实现方式中，第一测量结果包括第二载波列表。其中，根据第一测量结果和第二测量结果，确定候选载波，包括：对于第二载波列表中的任一载波，在该载波满足第一条件的情况下，将该载波确定为候选载波；或者，在第二载波列表的所有载波上都没有侧行链路授权的情况下，对于第二载波列表中的任一载波，在该载波满足第一条件的情况下，将该载波确定为候选载波；或者，在第二载波列表的部分或全部载波上有侧行链路授权的情况下，对于第二载波列表中触发了载波选择的任一载波，在该载波满足第二条件的情况下，将该载波确定为候选载波，对于第二载波列表中未触发载波选择的任一载波，在该载波满足第一条件的情况下，将该载波确定为候选载波。其中，第一条件为第一终端设备测量得到的载波的CBR低于载波对应的第一CBR载波选择阈值；第二条件为第一终端设备测量得到的载波的CBR低于载波对应的第一CBR载波保留阈值。
基于该方案，第一终端设备所选择的候选载波的CBR在第一终端设备侧和第二终端设备侧的测量结果都低于对应的CBR载波选择/保留阈值，能够保证候选载波既适用于第一终端设备，也适用于第二终端设备，从而能够保证正常的侧行链路通信。
在一种可能的实现方式中，第一测量结果还包括第二载波列表中每个载波的CBR。
在一种可能的实现方式中，根据第一测量结果和第二测量结果，确定候选载波，包括：对于第二载波列表中的任一载波，在该载波满足第一条件的情况下，将该载波确定为候选载波；或者，在第二载波列表的所有载波上都没有侧行链路授权的情况下，对于第二载波列表中的任一载波，在该载波满足第一条件的情况下，将该载波确定为候选载波；或者，在第二载波列表中的部分或全部载波上有侧行链路授权的情况下，对于第二载波列表中触发了载波选择的任一载波，在该载波满足第二条件的情况下，将该载波确定为候选载波，对于第二载波列表中未触发载波选择的任一载波，在该载波满足第一条件的情况下，将该载波确定为候选载波。其中，第一条件为第一终端设备测量得到的载波的CBR和第二终端设备测量得到的载波的CBR的均值低于载波对应的第一CBR载波选择阈值或载波对应的第二CBR载波选择阈值。第二条件为第一终端设备测量得到的载波的CBR和第二终端设备测量得到的载波的CBR的均值低于载波对应的第一CBR载波保留阈值或载波对应的第二CBR载波保留阈值。
基于该方案，由于第一终端设备所选择的候选载波的CBR在第一终端设备侧和第二终端设备侧的CBR的均值低于对应的CBR载波选择/保留阈值，因此有利于保证候选载波既适用于第一终 端设备，也适用于第二终端设备，从而能够保证正常的侧行链路通信。
在一种可能的实现方式中，第一测量结果还包括第二CBR载波选择阈值和/或第二CBR载波保留阈值。
在一种可能的实现方式中，在接收来自第二终端设备的第一测量结果之前，该方法还包括：向第二终端设备发送数据的优先级或数据对应的逻辑信道的优先级，数据的优先级或数据对应的逻辑信道的优先级用于第二终端设备确定第二CBR载波选择阈值和/或第二CBR载波保留阈值。
在一种可能的实现方式中，在接收来自第二终端设备的第一测量结果之前，该方法还包括：向第二终端设备发送第二CBR载波选择阈值和/或第二CBR载波保留阈值。
例如，如果第一终端设备不能确定第二CBR载波选择阈值和/或第二CBR载波保留阈值，第二终端设备可以在确定第二CBR载波选择阈值和/或第二CBR载波保留阈值后，将其发送给第一终端设备。这样，第一终端设备可以根据第二CBR载波选择阈值和/或第二CBR载波保留阈值，进行候选载波的选择。
在一种可能的实现方式中，该方法还可以包括：从候选载波中确定目标载波，并向第二终端设备发送目标载波的信息(比如，目标载波的索引或标识)。之后，第一终端设备可以在目标载波上发送数据，相应地，第二终端设备可以在目标载波上接收数据。
由于候选载波适用于第一终端设备和第二终端设备，因此能够保证在目标载波上的侧链链路通信。
第二方面，提供了一种切换方法，该方法可以由第二终端设备执行，也可以由第二终端设备的部件(例如处理器、芯片、或芯片系统等)执行，还可以由能实现全部或部分第二终端设备功能的逻辑模块或软件实现。其中，第二终端设备为数据的接收方。
该方法包括：确定第一测量结果；向第一终端设备发送第一测量结果。其中，第一测量结果包括第二终端设备测量得到的第一载波列表中每个载波的信道繁忙率CBR，或者，第一测量结果包括第二载波列表，第二载波列表由第一载波列表中的至少一个第一载波构成，第二终端设备测量到的第一载波的CBR低于对应的CBR阈值。并且，第一测量结果用于第一终端设备确定候选载波，候选载波用于通过第一终端设备通过与第二终端设备之间的侧行链路发送数据。
根据本申请提供的通信方法，第二终端设备可以对载波的CBR进行测量，然后将测量结果反馈给第一终端设备。第一终端设备可以结合自己和第二终端设备对载波的CBR的测量结果，选择候选载波。这样，能够尽可能保证所选择的候选载波对第一终端设备和第二终端设备都适用，从而有利于保证正常的侧行链路通信。
在一种可能的实现方式中，在确定第一测量结果之前，该方法还包括：接收来自第一终端设备的第一载波列表。其中，第一载波列表为第一终端设备上层配置的载波列表、网络能够支持的载波列表、第一终端设备能够支持的载波列表、或者前述任意两种或三种的交集。
在一种可能的实现方式中，第一载波列表为第一终端设备和第二终端设备均支持的载波列表；以及，在确定第一测量结果之前，方法还包括：接收来自第一终端设备的配置消息，配置消息包括第一载波列表和反馈周期，配置消息用于第二终端设备根据反馈周期周期性的反馈第一载波列表中每个载波的CBR；其中，向第一终端设备发送第一测量结果，包括：根据反馈周期向第一终端设备发送第一测量结果。
在一种可能的实现方式中，第一载波列表为第二终端设备上层配置的载波列表、网络能够支持的载波列表、第二终端设备能够支持的载波列表、或者前述任意两种或三种的交集。
在一种可能的实现方式中，第一测量结果还包括第二载波列表中每个载波的CBR。
在一种可能的实现方式中，确定第一测量结果，包括：测量第一载波列表中每个载波的CBR；对于第一载波列表中的任一载波，在该载波满足第三条件的情况下，将该载波确定为第一载波；或者，在第一载波列表的所有载波上都没有侧行链路授权的情况下，对于第一载波列表中的任一载波，在该载波满足第三条件的情况下，将该载波确定为第一载波；或者，在第一载波列表中的部分或全部载波上有侧行链路授权的情况下，对于第一载波列表中触发了载波选择的任一载波，在该载波满足第四条件的情况下，将该载波确定为第一载波，对于第一载波列表中未触发载波选择的任一载波，在该载波满足第三条件的情况下，将该载波确定为第一载波。其中，第三条件为 第二终端设备测量得到的载波的CBR低于载波对应的第二CBR载波选择阈值；第四条件为第二终端设备测量得到的载波的CBR低于载波对应的第二CBR载波保留阈值。
在一种可能的实现方式中，第一测量结果还包括第二CBR载波选择阈值和/或第二CBR载波保留阈值。
在一种可能的实现方式中，在确定第一测量结果之前，该方法还包括：接收来自第一终端设备的数据的优先级或数据对应的逻辑信道的优先级；根据数据的优先级或数据对应的逻辑信道的优先级确定第二CBR载波选择阈值和/或第二CBR载波保留阈值。
在一种可能的实现方式中，在确定第一测量结果之前，该方法还包括：接收来自第一终端设备的第二CBR载波选择阈值和/或第二CBR载波保留阈值。
在一种可能的实现方式中，该方法还可以包括：接收来自第一终端设备的目标载波的信息。其中，目标载波属于候选载波。
由于候选载波适用于第一终端设备和第二终端设备，因此能够保证在目标载波上的侧链链路通信。
第三方面，提供了一种切换方法，该方法可以由第一终端设备执行，也可以由第一终端设备的部件(例如处理器、芯片、或芯片系统等)执行，还可以由能实现全部或部分第一终端设备功能的逻辑模块或软件实现。其中，第一终端设备为数据的发送方。
该方法包括：测量第一载波列表中每个载波的CBR，第一载波列表为第一终端设备上层配置的载波列表、网络能够支持的载波列表、第一终端设备能够支持的载波列表、或者前述任意两种或三种的交集；向第二终端设备发送第一测量结果，第一测量结果包括第一载波列表中每个载波的CBR，或者，第一测量结果包括第二载波列表，第二载波列表由第一载波列表中的至少一个第一载波构成，第一终端设备测量到的第一载波的CBR低于对应的CBR阈值；接收来自第二终端设备的候选载波的信息，候选载波是第二终端设备根据第一测量结果和第二终端设备对第一载波列表或第二载波列表中的每个载波的CBR测量得到的，候选载波用于通过第一终端设备通过与第二终端设备之间的侧行链路发送数据。
根据本申请提供的通信方法，第一终端设备可以对载波的CBR进行测量，然后将测量结果反馈给第二终端设备。第二终端设备可以结合自己和第一终端设备对载波的CBR的测量结果，选择候选载波。然后，第二终端设备将候选载波的信息告知第一终端设备。这样，能够尽可能保证所选择的候选载波对第一终端设备和第二终端设备都适用，从而有利于保证正常的侧行链路通信。
在一种可能的实现方式中，在向第二终端设备发送第一测量结果之前，该方法还包括：对于第一载波列表中的任一载波，在该载波满足第一条件的情况下，将该载波确定为第一载波；或者，在第一载波列表的所有载波上都没有侧行链路授权的情况下，对于第一载波列表中的任一载波，在该载波满足第一条件的情况下，将该载波确定为第一载波；或者，在第一载波列表中的部分或全部载波上有侧行链路授权的情况下，对于第一载波列表中触发了载波选择的任一载波，在该载波满足第二条件的情况下，将该载波确定为第一载波，对于第一载波列表中未触发载波选择的任一载波，在该载波满足第一条件的情况下，将该载波确定为第一载波。其中，第一条件为第一终端设备测量得到的载波的CBR低于载波对应的第一CBR载波选择阈值；第二条件为第一终端设备测量得到的载波的CBR低于载波对应的第一CBR载波保留阈值。
基于该方案，第一终端设备可以从第一载波列表中选择出CBR低于对应的第一CBR载波选择/保留阈值的载波，并将这些载波反馈给第二终端设备。
在一种可能的实现方式中，第一测量结果还包括第二载波列表中每个载波的CBR。
在一种可能的实现方式中，第一测量结果还包括下述中的一项或多项阈值信息：第一CBR载波选择阈值、第一CBR载波保留阈值、第二CBR载波选择阈值、或者第二CBR载波保留阈值，阈值信息用于第二终端设备确定候选载波。
在一种可能的实现方式中，第一测量结果还包括数据的优先级或数据对应的逻辑信道的优先级，数据的优先级或数据对应的逻辑信道的优先级用于第二终端设备确定第二CBR载波选择阈值和/或第二CBR载波保留阈值，第二CBR载波选择阈值和/或第二CBR载波保留阈值用于第二终端设备确定候选载波。
在一种可能的实现方式中，该方法还可以包括：接收来自第二终端设备的候选载波的信息；从候选载波中确定目标载波，并向第二终端设备发送目标载波的信息(比如，目标载波的索引或标识)。之后，第一终端设备可以在目标载波上发送数据，相应地，第二终端设备可以在目标载波上接收数据。
由于候选载波适用于第一终端设备和第二终端设备，因此能够保证在目标载波上的侧链链路通信。
第四方面，提供了一种切换方法，该方法可以由第二终端设备执行，也可以由第二终端设备的部件(例如处理器、芯片、或芯片系统等)执行，还可以由能实现全部或部分第二终端设备功能的逻辑模块或软件实现。其中，第二终端设备为数据的接收方。
该方法包括：接收来自第一终端设备的第一测量结果，第一测量结果包括第一终端设备测量得到的第一载波列表中每个载波的CBR，或者，第一测量结果包括第二载波列表，第一载波列表为第一终端设备上层配置的载波列表、网络能够支持的载波列表、第一终端设备能够支持的载波列表、或者前述任意两种或三种的交集，第二载波列表由第一载波列表中的至少一个第一载波构成，第一终端设备测量到的第一载波的CBR低于对应的CBR阈值；测量第一载波列表或第二载波列表中每个载波的CBR，得到第二测量结果；根据第一测量结果和第二测量结果，确定候选载波，候选载波用于通过第一终端设备通过与第二终端设备之间的侧行链路发送数据；向第一终端发送候选载波的信息。
根据本申请提供的通信方法，第一终端设备可以对载波的CBR进行测量，然后将测量结果反馈给第二终端设备。第二终端设备可以结合自己和第一终端设备对载波的CBR的测量结果，选择候选载波。然后，第二终端设备将候选载波的信息告知第一终端设备。这样，能够尽可能保证所选择的候选载波对第一终端设备和第二终端设备都适用，从而有利于保证正常的侧行链路通信。
在一种可能的实现方式中，第一测量结果包括第一载波列表中每个载波的CBR。其中，根据第一测量结果和第二测量结果，确定候选载波，包括：对于第一载波列表中的任一载波，在该载波满足第三条件的情况下，将该载波确定为候选载波；或者，在第一载波列表的所有载波上都没有侧行链路授权的情况下，对于第一载波列表中的任一载波，在该载波满足第三条件的情况下，将该载波确定为候选载波；或者，在第一载波列表中的部分或全部载波上有侧行链路授权的情况下，对于第一载波列表中触发了载波选择的任一载波，在该载波满足第四条件的情况下，将该载波确定为候选载波，对于第一载波列表中未触发载波选择的任一载波，在该载波满足第三条件的情况下，将该载波确定为候选载波。其中，第三条件为第一终端设备测量得到的载波的CBR低于载波对应的第一CBR载波选择阈值，且第二终端设备测量得到的载波的CBR低于载波对应的第二CBR载波选择阈值，或者，第三条件为第一终端设备测量得到的载波的CBR和第二终端设备测量得到的载波的CBR的均值低于载波对应的第一CBR载波选择阈值或载波对应的第二CBR载波选择阈值。第四条件为第一终端设备测量得到的载波的CBR低于载波对应的第一CBR载波保留阈值，且第二终端设备测量得到的载波的CBR低于载波对应的第二CBR载波保留阈值，或者，第四条件为第一终端设备测量得到的载波的CBR和第二终端设备测量得到的载波的CBR的均值低于载波对应的第一CBR载波保留阈值或载波对应的第二CBR载波保留阈值。
基于该方案，通过选择第一终端设备和第二终端设备测量到的CBR都低于对应的CBR载波选择/保留阈值的载波作为候选载波，或者，通过选择第一终端设备和第二终端设备测量到的CBR的均值低于对应的CBR载波选择/保留阈值的载波作为候选载波的载波作为候选载波，能够保证候选载波既适用于第一终端设备，也适用于第二终端设备，从而能够保证正常的侧行链路通信。
在一种可能的实现方式中，第一测量结果还包括第二载波列表中每个载波的CBR。
在一种可能的实现方式中，第一测量结果包括第二载波列表；其中，根据第一测量结果和第二测量结果，确定候选载波，包括：对于第二载波列表中的任一载波，在该载波满足第三条件的情况下，将该载波确定为候选载波；或者，在第二载波列表的所有载波上都没有侧行链路授权的情况下，对于第二载波列表中的任一载波，在该载波满足第三条件的情况下，将该载波确定为候选载波；或者，在第二载波列表的部分或全部载波上有侧行链路授权的情况下，对于第二载波列表中触发了载波选择的任一载波，在该载波满足第四条件的情况下，将该载波确定为候选载波， 对于第二载波列表中未触发载波选择的任一载波，在该载波满足第三条件的情况下，将该载波确定为候选载波。其中，第三条件为第二终端设备测量得到的载波的CBR低于载波对应的第二CBR载波选择阈值；第四条件为第二终端设备测量得到的载波的CBR低于载波对应的第二CBR载波保留阈值。
基于该方案，第一终端设备所选择的候选载波的CBR在第一终端设备侧和第二终端设备侧的测量结果都低于对应的CBR载波选择/保留阈值，能够保证候选载波既适用于第一终端设备，也适用于第二终端设备，从而能够保证正常的侧行链路通信。
在一种可能的实现方式中，根据第一测量结果和第二测量结果，确定候选载波，包括：对于第二载波列表中的任一载波，在该载波满足第三条件的情况下，将该载波确定为候选载波；或者，在第二载波列表的所有载波上都没有侧行链路授权的情况下，对于第二载波列表中的任一载波，在该载波满足第三条件的情况下，将该载波确定为候选载波；或者，在第二载波列表中的部分或全部载波上有侧行链路授权的情况下，对于第二载波列表中触发了载波选择的任一载波，在该载波满足第四条件的情况下，将该载波确定为候选载波，对于第二载波列表中未触发载波选择的任一载波，在该载波满足第三条件的情况下，将该载波确定为候选载波。其中，第三条件为第一终端设备测量得到的载波的CBR和第二终端设备测量得到的载波的CBR的均值低于载波对应的第一CBR载波选择阈值或载波对应的第二CBR载波选择阈值；第四条件为第一终端设备测量得到的载波的CBR和第二终端设备测量得到的载波的CBR的均值低于载波对应的第一CBR载波保留阈值或载波对应的第二CBR载波保留阈值。
基于该方案，由于第二终端设备所选择的候选载波的CBR在第一终端设备侧和第二终端设备侧的CBR的均值低于对应的CBR载波选择/保留阈值，因此有利于保证候选载波既适用于第一终端设备，也适用于第二终端设备，从而能够保证正常的侧行链路通信。
在一种可能的实现方式中，第一测量结果还包括下述中的一项或多项：第一CBR载波选择阈值、第一CBR载波保留阈值第二CBR载波选择阈值、或者第二CBR载波保留阈值。
在一种可能的实现方式中，第一测量结果还包括数据的优先级或数据对应的逻辑信道的优先级；以及，该方法还包括：根据数据的优先级或数据对应的逻辑信道的优先级，确定第二CBR载波选择阈值和/或第二CBR载波保留阈值。
在一种可能的实现方式中，该方法还可以包括：接收来自第一终端设备的目标载波的信息。其中，目标载波属于候选载波。
由于候选载波适用于第一终端设备和第二终端设备，因此能够保证在目标载波上的侧链链路通信。
第五方面，提供了一种通信装置，包括用于执行第一方面或第一方面中任一种可能实现方式中的方法的模块或单元，或包括用于执行第二方面或第二方面中任一种可能实现方式中的方法的模块或单元，或包括用于执行第三方面或第三方面中任一种可能实现方式中的方法的模块或单元，或包括用于执行第四方面或第四方面中任一种可能实现方式中的方法的模块或单元。
第六方面，提供了一种通信装置，包括处理器，处理器与存储器耦合，存储器用于存储计算机程序或指令，处理器用于执行存储器存储的计算机程序或指令，以实现第一方面或第一方面中任一种可能实现方式中的方法，或实现第二方面或第二方面中任一种可能实现方式中的方法，或实现第三方面或第三方面中任一种可能实现方式中的方法，或实现第四方面或第四方面中任一种可能实现方式中的方法。
在一种可能的实现方式中，该装置还包括与处理器耦合的存储器。
在一种可能的实现方式中，处理器为一个或多个，和/或，存储器为一个或多个。
在一种可能的实现方式中，存储器可以与处理器集成在一起，或者存储器与处理器分离设置。
在一种可能的实现方式中，该装置还包括通信接口，处理器与通信接口耦合。
在一种实现方式中，该装置为终端设备(例如，第一终端设备或第二终端设备)。示例性的，该通信接口可以是收发器，或，输入/输出接口。
在另一种实现方式中，该装置为终端设备(例如，第一终端设备或第二终端设备)中的芯片。示例性的，该通信接口可以是输入/输出接口。
第七方面，提供了一种处理器，包括：输入电路、输出电路和处理电路。该处理电路用于通过该输入电路接收信号，并通过该输出电路发射信号，使得该处理器执行第一方面或第一方面中任一种可能实现方式中的方法，或第二方面或第二方面中任一种可能实现方式中的方法，或第三方面或第三方面中任一种可能实现方式中的方法，或第四方面或第四方面中任一种可能实现方式中的方法。
在具体实现过程中，上述处理器可以为芯片，输入电路可以为输入管脚，输出电路可以为输出管脚，处理电路可以为晶体管、门电路、触发器和各种逻辑电路等。输入电路所接收的输入的信号可以是由例如但不限于接收器接收并输入的，输出电路所输出的信号可以是例如但不限于输出给发射器并由发射器发射的，且输入电路和输出电路可以是同一电路，该电路在不同的时刻分别用作输入电路和输出电路。本申请对处理器及各种电路的具体实现方式不做限定。
第八方面，提供了一种通信系统，包括前述第一方面中的第一终端设备和/或第二方面中的第二终端设备、或包括前述第三方面中的第一终端设备和/或第四方面中的第二终端设备。
第九方面，提供了一种计算机程序产品，该计算机程序产品包括：计算机程序(也可以称为代码，或指令)，当该计算机程序被运行时，使得计算机执行第一方面或第一方面中任一种可能实现方式中的方法，或第二方面或第二方面中任一种可能实现方式中的方法，或第三方面或第三方面中任一种可能实现方式中的方法，或第四方面或第四方面中任一种可能实现方式中的方法。
第十方面，提供了一种计算机可读存储介质，该计算机可读存储介质存储有计算机程序(也可以称为代码，或指令)，当计算机程序在计算机上运行时，使得计算机执行第一方面或第一方面中任一种可能实现方式中的方法，或第二方面或第二方面中任一种可能实现方式中的方法，或第三方面或第三方面中任一种可能实现方式中的方法，或第四方面或第四方面中任一种可能实现方式中的方法。
第十一方面，提供了一种芯片，包括处理器，该处理器用于从存储器中调用并运行计算机程序，使得安装有所述芯片的通信装置执行第一方面或第一方面中任一种可能实现方式中的方法，或第二方面或第二方面中任一种可能实现方式中的方法，或第三方面或第三方面中任一种可能实现方式中的方法，或第四方面或第四方面中任一种可能实现方式中的方法。
附图说明
图1是本申请实施例提供的一种通信系统的示意图；
图2是本申请实施例提供的一种选择候选载波的示意图；
图3是本申请实施例提供的一种通信方法的示意性流程图；
图4是本申请实施例提供的一种通信方法的示意性流程图；
图5是本申请实施例提供的一种通信方法的示意性流程图；
图6是本申请实施例提供的一种通信方法的示意性流程图；
图7是本申请实施例提供的一种通信装置的示意性框图；
图8是本申请实施例提供的另一种通信装置的示意性框图；
图9是本申请实施例提供的一种终端设备的示意性结构图。
具体实施方式
下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行描述。
在本申请的描述中，除非另有说明，“/”表示前后关联的对象是一种“或”的关系，例如，A/B可以表示A或B；本申请中的“和/或”仅仅是一种描述关联对象的关联关系，表示可以存在三种关系，例如，A和/或B，可以表示：单独存在A，同时存在A和B，单独存在B这三种情况，其中A,B可以是单数或者复数。并且，在本申请的描述中，除非另有说明，“多个”是指两个或多于两个。“以下至少一项(个)”或其类似表达，是指的这些项中的任意组合，包括单项(个)或复数项(个)的任意组合。例如，a，b，或c中的至少一项(个)，可以表示：a，b，c，a-b，a-c，b-c，或a-b-c，其中a，b，c可以是单个，也可以是多个。另外，为了便于清楚描述本申请实施例的技术方案，在本申请的实施例中，采用了“第一”、“第二”等字样对功能和作用基本相同的相同项或相似项进行区分。本领域技术人员可以理解“第一”、“第二”等字样并不对数量和执行次序进行限定，并且“第一”、“第二”等字样也并不限定一定不同。
应理解，本申请中，“在……情况下”、“如果……”、“当……时”、“若……”等类似的描述可以替换使用。
本申请实施例的技术方案可以应用于各种通信系统，例如：长期演进(long term evolution，LTE)系统、第五代(5th Generation，5G)移动通信系统、新无线(New Radio，NR)以及未来可能出现的其他移动通信系统等。
示例性的，本申请实施例的技术方案可以应用于车联网(vehicle to everything，V2X)通信系统中。比如，车车通信(vehicle to vehicle，V2V)、车人通信(vehicle to pedestrian，V2P)、车-网络(vehicle to network，V2N)业务、或者车与基础设施通信(vehicle to infrastructure，V2I)等。又如，室内商用场景中，如手机与智慧屏通信，手机与VR眼镜通信等。
本申请实施例中的终端设备可以指(user equipment，UE)、站点(station)、接入终端、用户单元、用户站、移动站、移动台、远方站、远程终端、移动设备、用户终端、终端、无线通信设备、用户代理或用户装置。终端设备还可以是蜂窝电话、无绳电话、会话启动协议(session initiation protocol，SIP)电话、无线本地环路(wireless local loop，WLL)站、个人数字助理(personal digital assistant，PDA)、具有无线通信功能的手持设备、计算设备或连接到无线调制解调器的其它处理设备、大屏、车载设备、可穿戴设备，5G网络中的终端设备或者未来演进的公用陆地移动通信网络(public land mobile network，PLMN)中的终端设备等，本申请实施例对此并不限定。另外，本申请实施例涉及两个终端设备(发送端和接收端)的类型可以相同也可以不同，比如两个终端设备都为手机，或者一个为手机，一个为笔记本电脑。
本申请实施例中的网络设备，是指将终端设备接入到无线网络的无线接入网(radio access network，RAN)节点(或设备)，又可以称为基站。例如，该网络设备可以是演进型基站(evolved NodeB，eNodeB)、发送接收点(transmission reception point，TRP)、5G移动通信系统中的下一代基站(next generation NodeB，gNB)、未来移动通信系统中的基站或WiFi系统中的接入节点(access point，AP)、云无线接入网络(cloud radio access network，CRAN)场景下的无线控制器、中继站、接入点、车载设备、可穿戴设备、未来演进的其他通信系统中的网络设备等。又如，该网络设备也可以是完成基站部分功能的模块或单元，例如，可以是集中式单元(central unit，CU)或者分布式单元(distributed unit，DU)。本申请对网络设备所采用的具体技术和具体设备形态不做限定。
在本申请实施例中，终端设备包括硬件层、运行在硬件层之上的操作系统层，以及运行在操作系统层上的应用层。该硬件层包括中央处理器(central processing unit，CPU)、内存管理单元(memory management unit，MMU)和内存(也称为主存)等硬件。该操作系统可以是任意一种或多种通过进程(process)实现业务处理的计算机操作系统，例如，Linux操作系统、Unix操作系统、Android操作系统、iOS操作系统或windows操作系统等。该应用层包含浏览器、通讯录、文字处理软件、即时通信软件等应用。并且，本申请实施例并未对本申请实施例提供的方法的执行主体的具体结构特别限定，只要能够通过运行记录有本申请实施例的提供的方法的代码的程序，以根据本申请实施例提供的方法进行通信即可，例如，本申请实施例提供的方法的执行主体可以是终端设备或网络设备，或者，是终端设备或网络设备中能够调用程序并执行程序的功能模块。
另外，本申请的各个方面或特征可以实现成方法、装置或使用标准编程和/或工程技术的制品。本申请中使用的术语“制品”涵盖可从任何计算机可读器件、载体或介质访问的计算机程序。例如，计算机可读介质可以包括，但不限于:磁存储器件(例如，硬盘、软盘或磁带等)，光盘(例如，压缩盘(compact disc，CD)、数字通用盘(digital versatile disc，DVD)等)，智能卡和闪存器件(例如，可擦写可编程只读存储器(erasable programmable read-only memory，EPROM)、卡、棒或钥匙驱动器等)。另外，本文描述的各种存储介质可代表用于存储信息的一个或多个设备和/或其它机器可读介质。术语“机器可读介质”可包括但不限于，无线信道和能够存储、包含和/或承载指令和/或数据的各种其它介质。
图1示出了适用于本申请的一种通信系统的示意性框图。参见图1，该系统100中包括两种通信接口，即PC5接口和Uu接口。其中，PC5接口是两个终端设备(例如图中所示终端设备110和终端设备120)之间的直连通信接口。终端设备之间的直连通信链路也被定义为侧行链路或侧 链(sidelink，SL)。Uu接口是终端设备(例如，终端设备110或终端设备120)与网络设备130之间通信的接口。
应理解，图1所示的通信系统中还可以包括更多的网络节点，例如更多的终端设备或网络设备，本申请实施例在图中不再一一示出。
载波的CBR在一定程度上可以反映载波对应的信道或子信道或资源被占用的比率，当CBR低于一定阈值时，认为载波对应的信道或子信道或资源被附近较少的用户所使用。那么，通过该载波传输数据时，干扰较小，从而可以保证SL资源传输的有效性。
以图1所示的系统为例，终端设备110可以通过与终端设备120之间的侧行链路向终端设备120传输数据。在传输数据前，终端设备110首先需要通过测量载波的CBR，确定候选载波，然后再根据候选载波的CBR选择合适的载波传输数据。
具体地，参见图2，终端设备的上层在向接入层发送时，将业务数据的优先级和对应可用的载波列表告知终端设备。结合载波在不同优先级下的CBR载波选择阈值以及CBR载波保留阈值，终端设备可以获知所发送业务数据可用的载波列表，以及载波列表中每个载波对应的CBR阈值。如图2所示，业务数据可用的载波列表为{F1、F2、F3}。由于终端设备所发送的业务数据的优先级为PPPP1，对应的F1、F2和F3的CBR载波选择阈值分别为0.6、0.5和0.6。进一步地，终端设备测量得到的载波F1、F2和F3的CBR值分别为0.7、0.4和0.3。只有载波F2和F3低于对应的CBR载波选择阈值，因此F2和F3为候选载波。
上述方案可以应用于SL广播业务中。在NR V2X中，SL传输不仅有广播业务还有单播和组播业务，其中单播和组播业务需要保证对端的通信质量。那么，如果终端设备110选择的候选载波不适用于终端设备120，可能导致终端设备120接收失败。
有鉴于此，本申请提供了一种通信方法，通过结合基于侧行链路通信的两个终端设备对载波的CBR的测量结果，选择候选载波，能够尽可能保证所选择的候选载波对这两个终端设备都适用，从而有利于保证正常的侧行链路通信。
在对本申请提供的方法进行描述之前，首先进行几点说明。
1、本申请中涉及的载波(上)“没有侧行链路授权”是指，该载波上没有预留资源。相应地，载波上“有侧行链路授权”是指，该载波上有预留资源。
2、本申请中涉及的“触发了载波选择”的载波是指，该载波上预留的资源的位置不满足数据的延迟需求；或者，该载波上预留的资源不能够容纳所有待传输数据。
相应地，“没有触发载波选择”的载波是指，该载波上预留的资源的位置满足数据的延迟需求；或者，该载波上预留的资源能够容纳所有待传输数据。
3、本申请中涉及的触发了载波选择的载波，也可以替换为触发了载波重选的载波。相应地，没有触发载波选择的载波，也可以替换为没有触发载波重选的载波。
下面结合相应流程图，对本申请提供的方案进行详细说明。可以理解，本申请提供的示意性流程图中主要以不同终端设备作为该交互示意的执行主体为例来示意该方法，但本申请并不限制交互示意的执行主体。例如，示意性流程图中的终端设备(比如，第一终端设备或第二终端设备)也可以是支持该终端设备实现该方法的芯片、芯片系统、或处理器，还可以是能实现全部或部分终端设备功能的逻辑模块或软件。
需要说明的是，在下文描述的方法中，第一终端设备(比如，终端设备110)为数据的发送方，第二终端设备(比如，终端设备120)为数据的接收方。
图3本申请提供的一种通信方法的示意性流程图。该方法200可以包括S210至S230。下面对各个步骤进行详细描述。
S210，第二终端设备确定第一测量结果。
S220，第二终端设备向第一终端设备发送第一测量结果。相应地，第一终端设备接收来自第二终端设备的第一测量结果。
其中，第一测量结果包括第二终端设备测量得到的第一载波列表中每个载波的CBR。
具体地，第二终端设备可以测量第一载波列表中每个载波的CBR，并且，第二终端设备可以将测量得到的第一载波列表中每个载波的CBR反馈给第一终端设备。
在一个示例中，第一载波列表可以是第二终端设备上层配置的载波列表、网络能够支持的载波列表、第二终端设备能够支持的载波列表、或者前述任意两种或三种的交集。
比如，如果第二终端设备上层配置的载波列表中的载波满足：该载波为网络能够支持且第二终端设备能够支持的载波，那么，第一载波列表可以是第二终端设备上层配置的载波列表。
比如，第二终端设备能够支持的载波列表中的载波满足：该载波为第二终端设备上层配置的载波且该载波为网络能够支持的载波，那么第一载波列表可以是第二终端设备能够支持的载波列表。
比如，第二终端设备上层配置的载波列表、网络能够支持的载波列表、第二终端设备能够支持的载波列表，这三个载波列表是独立的，那么，第一载波列表可以是这三个载波列表的交集。例如，第二终端设备上层配置的载波列表、网络能够支持的载波列表、第二终端设备能够支持的载波列表分别为{1，2，3，4，5，6，7，8，9}，{1，3，4，6，7，8，9}，{1，2，3，4，5，6，7，9}，那么第一载波列表可以是{1，3，4，6，7，9}。
示例性的，第二终端设备上层配置的载波列表可以指：第二终端设备上层配置的与业务数据类型相关的载波列表。应理解，这里的业务数据是指第一终端设备即将向第二终端设备发送的数据，即第一终端设备的待传输或待发送数据。
示例性的，网络能够支持载波列表可以指：网络设备在给第二终端设备发送的配置消息中告知第二终端设备网络可以支持的载波列表或者来自于预配置信息中的载波列表。
示例性的，第一载波列表可以是预配置的，也可以是网络设备为第二终端设备配置的。
比如，第一载波列表可以包含在SL预配置消息(例如，SL-PreconfigurationNR)中。进一步地，第一载波列表可以是sl-FreqInfoToAddModList。
比如，网络设备可以通过无线资源控制(radio resource control，RRC)消息发送第一载波列表。该RRC消息可以是RRC重配置消息(RRCReconfiguration)，该RRC重配置消息可以在网络设备接收到SecurityModeComplete消息之后或者网络设备发送了SecurityModeCommand之后发送。
比如，网络设备可以通过系统信息块(system information block，SIB)消息(例如，SIB2)发送第一载波列表。
在另一个示例中，第一载波列表为第一终端设备向第二终端设备发送的。
具体来讲，在S210之前，该方法还可以包括：
S201，第一终端设备确定第一载波列表。
S202，第一终端设备向第二终端设备发送第一载波列表。相应地，第二终端设备接收来自第一终端设备的第一载波列表。
比如，第一终端设备向第二终端设备发送第一载波列表中每个载波的标识。
其中，第一载波列表可以是第一终端设备上层配置的载波列表、网络能够支持的载波列表、第一终端设备能够支持的载波列表、或者前述任意两种或三种的交集。
比如，如果第一终端设备上层配置的载波列表中的载波满足：该载波为网络能够支持且第一终端设备能够支持的载波，那么，第一载波列表可以是第一终端设备上层配置的载波列表。
比如，第一终端设备能够支持的载波列表中的载波满足：该载波为第一终端设备上层配置的载波且该载波为网络能够支持的载波，那么第一载波列表可以是第一终端设备能够支持的载波列表。
比如，第一终端设备上层配置的载波列表、网络能够支持的载波列表、第一终端设备能够支持的载波列表，这三个载波列表是独立的，那么，第一载波列表可以是这三个载波列表的交集。
示例性的，第一终端设备上层配置的载波列表可以指：第一终端设备上层配置的与业务数据类型相关的载波列表。其中，这里的业务数据类型是指待发送的数据(或称业务数据)类型。
示例性的，网络能够支持载波列表可以指：网络设备在给第一终端设备发送的配置消息中告知第一终端设备网络可以支持的载波列表或者来自于预配置信息中的载波列表。
示例性的，第一载波列表可以是预配置的，也可以是网络设备为第一终端设备配置的。
比如，第一载波列表可以包含在SL预配置消息(例如，SL-PreconfigurationNR)中。进一步 地，第一载波列表可以是sl-FreqInfoToAddModList。
比如，网络设备可以通过RRC消息发送第一载波列表。该RRC消息可以是RRC重配置消息(RRCReconfiguration)，该RRC重配置消息可以在网络设备接收到SecurityModeComplete消息之后或者网络设备发送了SecurityModeCommand之后发送。
比如，网络设备可以通过SIB消息(例如，SIB2)发送第一载波列表。
可选地，第一终端设备有数据需要发送时，或者在待发送数据所在的逻辑信道对应的所有载波都没有SL授权或者资源池被上层重配置时，可以触发执行S201。
示例性的，在S202中，第一载波列表可以通过PC5-RRC消息或侧行控制信息(sidelink control information，SCI)消息发送。
可选地，第二终端设备可以周期性地执行S210和S220。
第一终端设备可以向第二终端设备发送配置消息，该配置消息用于配置第一载波列表和反馈周期。第二终端设备根据第一终端设备的配置，周期性地测量并反馈第一载波列表中每个载波的CBR。
举例来说，在该方式中，第一载波列表可以是第一终端设备与第二终端设备协商的第一终端设备和第二终端设备都能够支持的载波列表。或者，第一载波列表可以是第一终端设备上层配置的载波列表、网络能够支持的载波列表、第一终端设备能够支持的载波列表、或者前述任意两种或三种的交集。
S230，第一终端设备根据第一测量结果和第二测量结果，确定候选载波。
在一些实施例中，第一终端设备可以在有数据要发送时执行下述S230。
在步骤S230中确定出的候选载波可能是一个，也可能是多个。或者说，在步骤S230中确定出的实际上为候选载波列表。其中，候选载波可以用于第一终端设备通过SL向第二终端设备发送数据。
具体地，第一终端设备可以测量第一载波列表中每个载波的CBR，并结合自己测量得到的第一载波列表中每个载波的CBR(即，第二测量结果)和第二终端设备测量得到的第一载波列表中每个载波的CBR，确定候选载波。
在一个示例中，对于第一载波列表中的任一载波，在该载波满足条件1的情况下，将该载波确定为候选载波。
其中，条件1为第一终端设备测量得到的该载波的CBR低于该载波对应的第一CBR载波选择阈值，且第二终端设备测量得到的该载波的CBR低于该载波对应的第二CBR载波选择阈值。
或者，条件1为第一终端设备测量得到的该载波的CBR和第二终端设备测量得到的该载波的CBR的均值低于该载波对应的第一CBR载波选择阈值或该载波对应的第二CBR载波选择阈值。
比如，第一载波列表为{1，3，4，6，7，9}，若第一终端设备测量得到的载波#1的CBR低于载波#1对应的第一CBR载波选择阈值，且第二终端设备测量得到的载波#1的CBR低于载波#1对应的第二CBR载波选择阈值，第一终端设备测量得到的载波#3的CBR低于载波#3对应的第一CBR载波选择阈值，且第二终端设备测量得到的载波#3的CBR低于载波#3对应的第二CBR载波选择阈值，则载波#1和载波#3可以作为候选载波。
在另一个示例中，在第一载波列表的所有载波上都没有侧行链路授权的情况下，对于第一载波列表中的任一载波，在该载波满足条件1的情况下，将该载波确定为候选载波。
即，若第一载波列表的所有载波上都没有侧行链路授权，则可以采用上个示例所描述的方案确定候选载波。
在又一个示例中，在第一载波列表中的部分或全部载波上有侧行链路授权的情况下：对于第一载波列表中触发了载波选择的任一载波，在该载波满足条件2的情况下，将该载波确定为候选载波；对于第一载波列表中未触发载波选择的任一载波，在该载波满足条件1的情况下，将该载波确定为候选载波。
其中，条件2为第一终端设备测量得到的该载波的CBR低于该载波对应的第一CBR载波保留阈值，且第二终端设备测量得到的该载波的CBR低于该载波对应的第二CBR载波保留阈值。
或者，条件2为第一终端设备测量得到的该载波的CBR和第二终端设备测量得到的该载波的 CBR的均值低于该载波对应的第一CBR载波保留阈值或该载波对应的第二CBR载波保留阈值。
比如，第一载波列表为{1，3，4，6，7，9}，若载波#1和载波#4触发了载波选择，且载波#1满足条件2，其他载波没有触发载波选择，且载波#6满足条件1，则载波#1和载波#6可以作为候选载波。
可选地，对于第一载波列表中的任一载波，该载波是否触发了载波选择，可以由第一终端设备通知第二终端设备。
可选地，对于任意一个载波，该载波对应的第一CBR载波选择阈值和第二CBR载波选择阈值可以相等，该载波对应的第一CBR载波保留阈值和第二CBR载波保留阈值可以相等。
可选地，对于任意一个载波，该载波对应的第一CBR载波选择阈值和第一CBR载波保留阈值可以相等，该载波对应的第二CBR载波选择阈值和第二CBR载波保留阈值可以相等。
可选地，第一终端设备可以根据待传输的数据的优先级或者该数据对应的逻辑信道的优先级，确定第一载波列表中每个载波对应的第一CBR载波选择阈值和/或第一CBR载波保留阈值。
具体地，数据的优先级或者该数据对应的逻辑信道的优先级、载波、第一CBR载波选择阈值和/或第一CBR载波保留阈值，这三者之间具有对应关系，在上述优先级确定后，对于某一个载波，该载波对应的第一CBR载波选择阈值和/或第一CBR载波保留阈值就可以确定。比如，参见图2，对于载波F1，当上述优先级为PPPP2时，该载波对应的第一CBR载波选择阈值和/或第一CBR载波保留阈值可以是0.6。
可选地，对于第一载波列表中的任一载波，该载波对应的第二CBR载波选择阈值和/或第二CBR载波保留阈值，可以由第一终端设备通知第二终端设备。或者，第一终端设备可以向第二终端设备发送待传输的数据的优先级或该数据对应的逻辑信道的优先级，根据优先级，第二终端设备可以确定每个载波对应的第二CBR载波选择阈值和/或第二CBR载波保留阈值。
进一步地，如果第二CBR载波选择阈值和/或第二CBR载波保留阈值是第二终端设备确定的，那么第二终端设备还可以向第一终端设备发送第二CBR载波选择阈值和/或第二CBR载波保留阈值。比如，第一测量结果中可以包含第二CBR载波选择阈值和/或第二CBR载波保留阈值。
综上，根据本申请提供的通信方法，第一终端设备可以结合自身对第一载波列表中每个载波的CBR的测量结果和第二终端设备对第一载波列表中每个载波的CBR的测量结果，确定候选载波。从而，能够尽可能保证候选载波对这第一终端设备和第二终端设备都适用，进而有利于保证正常的侧行链路通信。
在一些实施例中，第一终端设备可以使用部分候选载波，比如仅使用某一候选载波向第二终端设备发送数据。在该实施例中，在第一终端设备确定出候选载波后，该方法还可以包括：
S240，第一终端设备从候选载波中确定目标载波。
示例性的，第一终端设备可以按照候选载波CBR的递增的顺序选择目标载波。
比如，第一终端设备可以选择候选载波中第一终端设备测量得到的CBR最高的载波作为目标载波。
S250，第一终端设备向第二终端设备发送目标载波信息。
比如，第一终端设备可以向第二终端设备发送目标载波的标识。
在第一终端设备和第二终端设备都获知目标载波后，第一终端设备可以从目标载波上选择资源传输待发送数据。
图4本申请提供的一种通信方法的示意性流程图。该方法300可以包括S310至S330。下面对各个步骤进行详细描述。
S310，第二终端设备确定第一测量结果。
S320，第二终端设备向第一终端设备发送第一测量结果。相应地，第一终端设备接收来自第二终端设备的第一测量结果。
第二终端设备可以测量第一载波列表中每个载波的CBR，并根据测量得到的第一载波列表中每个载波的CBR，从第一载波列表中选择出至少一个第一载波。该至少一个第一载波构成的载波列表可以记为第二载波列表。第一测量结果可以包括第二载波列表。其中，第一载波对应的CBR低于对应的CBR阈值。
在一个示例中，对于第一载波列表中的任一载波，在该载波满足条件3的情况下，将该载波确定为第一载波。
其中，条件3为第二终端设备测量得到的该载波的CBR低于该载波对应的第二CBR载波选择阈值。
比如，第一载波列表为{1，3，4，6，7，9}，第二终端设备测量得到第一载波列表中每个载波的CBR和各个载波对应的第二CBR载波选择阈值如表1所示。
表1
参见表1，载波#1、载波#4和载波#6的CBR均低于对应的第二CBR载波选择阈值，其他的载波的CBR均高于对应的第二CBR载波选择阈值。因此，载波#1、载波#4和载波#6为第一载波，相应地，第二载波列表为{1，4，6}。
在另一个示例中，在第一载波列表的所有载波上都没有侧行链路授权的情况下，对于第一载波列表中的任一载波，在该载波满足条件3的情况下，将该载波确定为第一载波。
也就是说，如果第一载波列表的所有载波上都没有侧行链路授权，那么可以按照上个示例所描述的方法确定第一载波或第二载波列表。
在又一个示例中，在第一载波列表中的部分或全部载波上有侧行链路授权的情况下：对于第一载波列表中触发了载波选择的任一载波，在该载波满足条件4的情况下，将该载波确定为第一载波；对于第一载波列表中未触发载波选择的任一载波，在该载波满足条件3的情况下，将该载波确定为第一载波。
其中，条件4为第二终端设备测量得到的该载波的CBR低于该载波对应的第二CBR载波保留阈值。
比如，第一载波列表中的部分或全部载波上有侧行链路授权，第一载波列表为{1，3，4，6，7，9}，其中，载波#1、载波#4触发了载波选择，其他载波未触发载波选择。第二终端设备测量得到的第一载波列表中每个载波的CBR和各个载波对应的第二CBR载波选择阈值和第二CBR载波保留阈值如表2所示。
表2
参见表2，载波#1的CBR低于对应的第二CBR载波保留阈值，载波#6的CBR低于对应的第二CBR载波选择阈值。因此，载波#1和载波#6为第一载波，相应地，第二载波列表为{1，6}。
可选地，对于一个载波是否有侧行链路授权，可以由第一终端设备通知第二终端设备。
可选地，对于第一载波列表中的任一载波，如何确定该载波是否触发了载波选择，可以参考方法200中的描述。
可选地，关于第二终端设备如何确定第二CBR载波选择阈值和/或第二CBR载波保留阈值， 可以参考方法200中的描述。
可选地，关于第一载波列表的内容，也可以参考方法200中的描述。
应理解，在一个示例中，该方法300还可以包括S301和S302，S301和S302与S201和S202相同，可以参考S201和S202的描述。
S330，第一终端设备根据第一测量结果和第二测量结果，确定候选载波。
在步骤S330中确定出的候选载波可能是一个，也可能是多个。或者说，在步骤S330中确定出的实际上为候选载波列表。其中，候选载波可以用于第一终端设备通过SL向第二终端设备发送数据。
第一终端设备可以测量第二载波列表中每个载波的CBR，并结合自己测量得到的第二载波列表中每个载波的CBR(即，第二测量结果)和第一测量结果，确定候选载波。
在一个示例中，对于第二载波列表中的任一载波，在该载波满足条件5的情况下，将该载波确定为候选载波。
其中，条件5为第一终端设备测量得到的该载波的CBR低于该载波对应的第一CBR载波选择阈值。
比如，第二载波列表为{1，4，6}，若载波#1和载波#4满足条件5，载波#6不满足条件5，则载波#1和载波#4可以作为候选载波。
在另一个示例中，在第二载波列表的所有载波上都没有侧行链路授权的情况下，对于第二载波列表中的任一载波，在该载波满足条件5的情况下，将该载波确定为候选载波。
在又一个示例中，在第二载波列表中的部分或全部载波上有侧行链路授权的情况下：对于第二载波列表中触发了载波选择的任一载波，在该载波满足条件6的情况下，将该载波确定为候选载波；对于第二载波列表中未触发载波选择的任一载波，在该载波满足条件5的情况下，将该载波确定为候选载波。
其中，条件6为第一终端设备测量得到的该载波的CBR低于该载波对应的第一CBR载波保留阈值。
比如，第二载波列表为{1，4，6}，若载波#1和载波#4触发了载波选择，且载波#1满足条件6，其他载波没有触发载波选择，且载波#6满足条件5，则载波#1和载波#6可以作为候选载波。
可选地，对于任意一个载波，该载波对应的第一CBR载波选择阈值和第二CBR载波选择阈值可以相等，该载波对应的第一CBR载波保留阈值和第二CBR载波保留阈值可以相等。
可选地，第一终端设备可以根据待传输的数据的优先级或者该数据对应的逻辑信道的优先级，确定第一CBR载波选择阈值和/或第一CBR载波保留阈值。
可选地，如果第二CBR载波选择阈值和/或第二CBR载波保留阈值是第二终端设备确定的，那么第二终端设备还可以向第一终端设备发送第二CBR载波选择阈值和/或第二CBR载波保留阈值。比如，第一测量结果中可以包含第二CBR载波选择阈值和/或第二CBR载波保留阈值。
综上，根据本申请提供的通信方法，第一终端设备可以根据第二终端设备基于对载波的CBR的测量反馈的第二载波列表中每个载波的CBR的测量结果，确定候选载波。从而，能够尽可能保证候选载波对这第一终端设备和第二终端设备都适用，进而有利于保证正常的侧行链路通信。
在一些实施例中，方法300还可以包括S340和S350。
S340，第一终端设备从候选载波中确定目标载波。
S350，第一终端设备向第二终端设备发送目标载波信息。
在第一终端设备和第二终端设备都获知目标载波后，第一终端设备可以从目标载波上选择资源传输待发送数据。
关于S340和S350可以参考S240和S250。
图5本申请提供的一种通信方法的示意性流程图。该方法400可以包括S410至S430。下面对各个步骤进行详细描述。
S410，第二终端设备确定第一测量结果。
S420，第二终端设备向第一终端设备发送第一测量结果。相应地，第一终端设备接收来自第二终端设备的第一测量结果。
第二终端设备可以测量第一载波列表中每个载波的CBR，并根据测量得到的第一载波列表中每个载波的CBR，从第一载波列表中选择出至少一个第一载波。该至少一个第一载波构成的载波列表可以记为第二载波列表。第一测量结果可以包括第二载波列表和第二终端设备测量得到的第二载波列表中每个载波的CBR，即第一测量结果可以包括第二终端设备测量得到的每个第一载波的CBR。其中，第一载波对应的CBR低于对应的CBR阈值。
关于如何确定第一载波或者第二载波列表，可以参考方法300的描述。
可选地，对于第一载波列表中的任一载波，如何确定该载波是否触发了载波选择，可以参考方法200中的描述。
可选地，关于第二终端设备如何确定第二CBR载波选择阈值和/或第二CBR载波保留阈值，可以参考方法200中的描述。
可选地，关于第一载波列表的内容，也可以参考方法200中的描述。
应理解，在一个示例中，该方法400还可以包括S401和S402，S401和S402与S201和S202相同，可以参考S201和S202的描述。
S430，第一终端设备根据第一测量结果和第二测量结果，确定候选载波。
在步骤S430中确定出的候选载波可能是一个，也可能是多个。或者说，在步骤S430中确定出的实际上为候选载波列表。其中，候选载波可以用于第一终端设备通过SL向第二终端设备发送数据。
第一终端设备可以测量第二载波列表中每个载波的CBR，并结合自己测量得到的第二载波列表中每个载波的CBR(即，第二测量结果)和第一测量结果，确定候选载波。
在一个示例中，对于第二载波列表中的任一载波，在该载波满足条件7的情况下，将该载波确定为候选载波。
其中，条件7为第一终端设备测量得到的该载波的CBR和第二终端设备测量得到的该载波的CBR的均值低于该载波对应的第一CBR载波选择阈值或该载波对应的第二CBR载波选择阈值。
在另一个示例中，在第二载波列表的所有载波上都没有侧行链路授权的情况下，对于第二载波列表中的任一载波，在该载波满足条件7的情况下，将该载波确定为候选载波。
在又一个示例中，在第二载波列表中的部分或全部载波上有侧行链路授权的情况下：对于第二载波列表中触发了载波选择的任一载波，在该载波满足条件8的情况下，将该载波确定为候选载波；对于第二载波列表中未触发载波选择的任一载波，在该载波满足条件7的情况下，将该载波确定为候选载波。
其中，条件8为第一终端设备测量得到的该载波的CBR和第二终端设备测量得到的该载波的CBR的均值低于该载波对应的第一CBR载波保留阈值或该载波对应的第二CBR载波保留阈值。
应理解，在步骤S430中，也可以采用方法300中的步骤S330中所描述的方案确定候选载波。
可选地，对于任意一个载波，该载波对应的第一CBR载波选择阈值和第二CBR载波选择阈值可以相等，该载波对应的第一CBR载波保留阈值和第二CBR载波保留阈值可以相等。
可选地，第一终端设备可以根据待传输的数据的优先级或者该数据对应的逻辑信道的优先级，确定第一CBR载波选择阈值和/或第一CBR载波保留阈值。
可选地，如果第二CBR载波选择阈值和/或第二CBR载波保留阈值是第二终端设备确定的，那么第二终端设备还可以向第一终端设备发送第二CBR载波选择阈值和/或第二CBR载波保留阈值。比如，第一测量结果中可以包含第二CBR载波选择阈值和/或第二CBR载波保留阈值。
综上，根据本申请提供的通信方法，第一终端设备可以结合第二终端设备自身对第二载波列表中每个载波的CBR的测量结果和第二终端设备对第二载波列表中每个载波的CBR的测量结果，确定候选载波。从而，能够尽可能保证候选载波对这第一终端设备和第二终端设备都适用，进而有利于保证正常的侧行链路通信。
在一些实施例中，方法400还可以包括S440和S450。
S440，第一终端设备从候选载波中确定目标载波。
S450，第一终端设备向第二终端设备发送目标载波信息。
关于S440和S450可以参考S240和S250，或者参考S340和S350。
上文描述的通信方法均由第一终端设备确定候选载波。下面介绍本申请提供的另一种通信方法，该方法是由第二终端设备确定候选载波，并将候选载波的信息告知第一终端设备。
图6本申请提供的另一种通信方法的示意性流程图。该方法500可以包括S510至S560。下面对各个步骤进行详细描述。
S510，第一终端设备确定第一载波列表。
其中，第一载波列表可以是第一终端设备上层配置的载波列表、网络能够支持的载波列表、第一终端设备能够支持的载波列表、或者前述任意两种或三种的交集。
比如，如果第一终端设备上层配置的载波列表中的载波满足：该载波为网络能够支持且第一终端设备能够支持的载波，那么，第一载波列表可以是第一终端设备上层配置的载波列表。
比如，第一终端设备能够支持的载波列表中的载波满足：该载波为第一终端设备上层配置的载波且该载波为网络能够支持的载波，那么第一载波列表可以是第一终端设备能够支持的载波列表。
比如，第一终端设备上层配置的载波列表、网络能够支持的载波列表、第一终端设备能够支持的载波列表，这三个载波列表是独立的，那么，第一载波列表可以是这三个载波列表的交集。
示例性的，第一终端设备上层配置的载波列表可以指：第一终端设备上层配置的与业务数据类型相关的载波列表。其中，这里的业务数据类型是指待发送的数据(或称业务数据)类型。
示例性的，网络能够支持载波列表可以指：网络设备在给第一终端设备发送的配置消息中告知第一终端设备网络可以支持的载波列表或者来自于预配置信息中的载波列表。
示例性的，第一载波列表可以是预配置的，也可以是网络设备为第一终端设备配置的。
比如，第一载波列表可以包含在SL预配置消息(例如，SL-PreconfigurationNR)中。进一步地，第一载波列表可以是sl-FreqInfoToAddModList。
比如，网络设备可以通过RRC消息发送第一载波列表。该RRC消息可以是RRC重配置消息(RRCReconfiguration)，该RRC重配置消息可以在网络设备接收到SecurityModeComplete消息之后或者网络设备发送了SecurityModeCommand之后发送。
比如，网络设备可以通过SIB消息(例如，SIB2)发送第一载波列表。
示例性的，在待发送数据所在的逻辑信道对应的所有载波都没有SL授权或者资源池被上层重配置的时候，可以触发执行S510。
S520，第一终端设备确定第一测量结果。
在第一种实现方式中，第一终端设备可以测量第一载波列表中每个载波的CBR，第一终端设备测量得到的第一载波列表中每个载波的CBR可以作为第一测量结果。
在第二种实现方式中，第一终端设备可以测量第一载波列表中每个载波的CBR，并根据测量得到的第一载波列表中每个载波的CBR，从第一载波列表中选择出至少一个第一载波。该至少一个第一载波构成的载波列表可以记作第二载波列表。第一测量结果可以包括第二载波列表。可选地，第一测量结果还可以包括第一终端设备测量得到的第二载波列表中每个载波的CBR，即第一测量结果还可以包括第一终端设备测量得到的每个第一载波的CBR。其中，第一载波对应的CBR低于对应的CBR阈值。
在一个示例中，对于第一载波列表中的任一载波，在该载波满足条件1的情况下，将该载波确定为第一载波。
其中，条件1为第一终端设备测量得到的该载波的CBR低于该载波对应的第一CBR载波选择阈值。
比如，第一载波列表为{1，2，3，5，7，9}，第一终端设备测量得到第一载波列表中每个载波的CBR和各个载波对应的第一CBR载波选择阈值如表3所示。
表3

参见表3，载波#1、载波#2和载波#5的CBR均低于对应的第一CBR载波选择阈值，其他的载波的CBR均高于对应的第一CBR载波选择阈值。因此，载波#1、载波#2和载波#5为第一载波，相应地，第二载波列表为{1，2，5}。
在另一个示例中，在第一载波列表的所有载波上都没有侧行链路授权的情况下，对于第一载波列表中的任一载波，在该载波满足条件1的情况下，将该载波确定为第一载波。
也就是说，如果第一载波列表的所有载波上都没有侧行链路授权，那么可以按照上个示例所描述的方法确定第一载波或第二载波列表。
在又一个示例中，在第一载波列表中的部分或全部载波上有侧行链路授权的情况下：对于第一载波列表中触发了载波选择的任一载波，在该载波满足条件2的情况下，将该载波确定为第一载波；对于第一载波列表中未触发载波选择的任一载波，在该载波满足条件1的情况下，将该载波确定为第一载波。
其中，条件2为第一终端设备测量得到的该载波的CBR低于该载波对应的第一CBR载波保留阈值。
比如，第一载波列表中的部分或全部载波上有侧行链路授权，第一载波列表为{1，2，3，5，7，9}，其中，载波#1、载波#3触发了载波选择，其他载波未触发载波选择。第一终端设备测量得到的第一载波列表中每个载波的CBR和各个载波对应的第一CBR载波选择阈值和第一CBR载波保留阈值如表4所示。
表4
参见表4，载波#1的CBR低于对应的第一CBR载波保留阈值，载波#7的CBR低于对应的第一CBR载波选择阈值。因此，载波#1和载波#7为第一载波，相应地，第二载波列表为{1，7}。
可选地，第一终端设备可以根据待传输的数据的优先级或该数据对应的逻辑信道的优先级，确定每个载波对应的第一CBR载波选择阈值和/或第一CBR载波保留阈值。
S530，第一终端设备向第二终端设备发送第一测量结果。相应地，第二终端设备接收来自第一终端设备的第一测量结果。
S540，第二终端设备确定第二测量结果。
对应于S520中的第一种实现方式，第二终端设备可以测量第一载波列表中每个载波的CBR，第二终端设备测量得到的第一载波列表中每个载波的CBR即为第二测量结果。
对应于S520中的第二种实现方式，第二终端设备可以测量第二载波列表中每个载波的CBR，第二终端设备测量得到的第二载波列表中每个载波的CBR即为第二测量结果。
S550，第二终端设备根据第一测量结果和第二测量结果，确定候选载波。
对应于S520和S540中的第一种实现方式，第二终端设备可以根据自己和第一终端设备分别测量得到的第一载波列表中每个载波的CBR，确定候选载波。
在一个示例中，对于第一载波列表中的任一载波，在该载波满足条件3的情况下，将该载波确定为候选载波。
其中，条件3为第一终端设备测量得到的该载波的CBR低于该载波对应的第一CBR载波选 择阈值，且第二终端设备测量得到的该载波的CBR低于该载波对应的第二CBR载波选择阈值。
或者，条件3为第一终端设备测量得到的该载波的CBR和第二终端设备测量得到的该载波的CBR的均值低于该载波对应的第一CBR载波选择阈值或该载波对应的第二CBR载波选择阈值。
比如，第一载波列表为{1，2，3，5，7，9}，若载波#1和载波#2满足条件3，其他载波不满足条件3，则载波#1和载波#2可以作为候选载波。
在另一个示例中，在第一载波列表的所有载波上都没有侧行链路授权的情况下，对于第一载波列表中的任一载波，在该载波满足条件3的情况下，将该载波确定为候选载波。
在又一个示例中，在第一载波列表中的部分或全部载波上有侧行链路授权的情况下：对于第一载波列表中触发了载波选择的任一载波，在该载波满足条件4的情况下，将该载波确定为候选载波；对于第一载波列表中未触发载波选择的任一载波，在该载波满足条件3的情况下，将该载波确定为候选载波。
其中，条件4为第一终端设备测量得到的该载波的CBR低于该载波对应的第一CBR载波保留阈值，且第二终端设备测量得到的该载波的CBR低于该载波对应的第二CBR载波保留阈值。
或者，条件4为第一终端设备测量得到的该载波的CBR和第二终端设备测量得到的该载波的CBR的均值低于该载波对应的第一CBR载波保留阈值或该载波对应的第二CBR载波保留阈值。
比如，第一载波列表为{1，2，3，5，7，9}，若载波#1和载波#4触发了载波选择，且载波#1满足条件4，其他载波没有触发载波选择，且载波#7满足条件3，则载波#1和载波#7可以作为候选载波。
对应于S520和S540中的第二种实现方式，第二终端设备可以根据自己测量得到的第二载波列表中每个载波的CBR，确定候选载波。或者，第二终端设备可以根据自己和第一终端设备分别测量得到的第二载波列表中每个载波的CBR，确定候选载波。
情况1：第一测量结果包括第二载波列表，但不包括第二载波列表中每个载波的CBR。
在一个示例中，对于第二载波列表中的任一载波，在该载波满足条件5的情况下，将该载波确定为候选载波。
其中，条件5为第二终端设备测量得到的该载波的CBR低于该载波对应的第二CBR载波选择阈值。
比如，第二载波列表为{1，2，5}，若载波#1和载波#2满足条件5，载波#5不满足条件5，则载波#1和载波#2可以作为候选载波。
在另一个示例中，在第二载波列表的所有载波上都没有侧行链路授权的情况下，对于第二载波列表中的任一载波，在该载波满足条件5的情况下，将该载波确定为候选载波。
在又一个示例中，在第二载波列表中的部分或全部载波上有侧行链路授权的情况下：对于第二载波列表中触发了载波选择的任一载波，在该载波满足条件6的情况下，将该载波确定为候选载波；对于第二载波列表中未触发载波选择的任一载波，在该载波满足条件5的情况下，将该载波确定为候选载波。
其中，条件6为第二终端设备测量得到的该载波的CBR低于该载波对应的第一CBR载波保留阈值。
比如，第二载波列表为{1，7}，若载波#1触发了载波选择，且载波#1满足条件6，其他载波没有触发载波选择，且载波#7不满足条件5，则载波#1可以作为候选载波。
情况2：第一测量结果包括第二载波列表，且包括第二载波列表中每个载波的CBR。
在一个示例中，对于第二载波列表中的任一载波，在该载波满足条件7的情况下，将该载波确定为候选载波。
其中，条件7为第一终端设备测量得到的该载波的CBR和第二终端设备测量得到的该载波的CBR的均值低于该载波对应的第一CBR载波选择阈值或该载波对应的第二CBR载波选择阈值。
在另一个示例中，在第二载波列表的所有载波上都没有侧行链路授权的情况下，对于第二载波列表中的任一载波，在该载波满足条件7的情况下，将该载波确定为候选载波。
在又一个示例中，在第二载波列表中的部分或全部载波上有侧行链路授权的情况下：对于第二载波列表中触发了载波选择的任一载波，在该载波满足条件8的情况下，将该载波确定为候选 载波；对于第二载波列表中未触发载波选择的任一载波，在该载波满足条件7的情况下，将该载波确定为候选载波。
其中，条件8为第一终端设备测量得到的该载波的CBR和第二终端设备测量得到的该载波的CBR的均值低于该载波对应的第一CBR载波保留阈值或该载波对应的第二CBR载波保留阈值。
应理解，在情况2下，也可以采用针对情况1所描述的方案确定候选载波。
可选地，对于任意一个载波，该载波对应的第一CBR载波选择阈值和第二CBR载波选择阈值可以相等，该载波对应的第一CBR载波保留阈值和第二CBR载波保留阈值可以相等。
可选地，第二终端设备可以根据待传输的数据的优先级或者该数据对应的逻辑信道的优先级，确定第二CBR载波选择阈值和/或第二CBR载波保留阈值。待传输的数据的优先级或者该数据对应的逻辑信道的优先级可以是第一终端设备向第二终端设备发送的，比如，第一测量结果可以包括待传输的数据的优先级或者该数据对应的逻辑信道的优先级。
可选地，第一终端设备可以向第二终端设备发送第一CBR载波选择阈值和/或第一CBR载波保留阈值。比如，第一测量结果可以包括第一CBR载波选择阈值和/或第一CBR载波保留阈值。
S560，第二终端设备向第一终端设备发送候选载波的信息。相应地，第一终端设备接收来自第二终端设备的候选载波的信息。
综上，根据本申请提供的通信方法，第二终端设备可以结合自身对载波的CBR的测量结果和第一终端设备对载波的CBR的测量结果，确定候选载波，并且告知第一终端设备候选载波的信息。从而，能够尽可能保证候选载波对这第一终端设备和第二终端设备都适用，进而有利于保证正常的侧行链路通信。
在一些实施例中，第一终端设备可以使用部分候选载波，比如仅使用某一候选载波向第二终端设备发送数据。在该实施例中，在第一终端设备接收来自第二终端设备的候选载波的信息后，该方法还可以包括：
S570，第一终端设备从候选载波中确定目标载波。
示例性的，第一终端设备可以按照候选载波CBR的递增的顺序选择目标载波。
比如，第一终端设备可以选择候选载波中第一终端设备测量得到的CBR最高的载波作为目标载波。
S580，第一终端设备向第二终端设备发送目标载波信息。
比如，第一终端设备可以向第二终端设备发送目标载波的标识。
在第一终端设备和第二终端设备都获知目标载波后，第一终端设备可以从目标载波上选择资源传输待发送数据。
在前文描述的方法中涉及载波的CBR的概念。下面对如何确定载波的CBR进行举例说明。
示例1：每个载波可以关联一个候选资源池，该候选资源池的CBR作为该候选资源池所关联的载波的CBR。
例如，在方法200中，若第一载波列表为第一终端设备确定的，第一终端设备可以自己确定第一载波列表中每个载波关联的候选资源池，或者网络设备可以向第一终端设备配置第一载波列表中每个载波关联的候选资源池。并且，第一终端设备可以向第二终端设备通知第一载波列表中每个载波关联的候选资源池。若第一载波列表为第二终端设备确定的，第二终端设备可以自己确定第一载波列表中每个载波关联的候选资源池，或者网络设备可以向第二终端设备配置第一载波列表中每个载波关联的候选资源池。并且，第二终端设备可以向第一终端设备通知第一载波列表中每个载波关联的候选资源池。
示例2：第一终端设备或第二终端设备将载波上最大或者最小资源池的CBR作为该资源池所在载波的CBR载波。
示例3：第一终端设备或第二终端设备将载波上前N个较大或者较小资源池CBR的均值作为该资源池所在载波的CBR。
示例4：一个载波的CBR是由该载波上所有资源池中满足RSSI阈值的子信道(sub-channel)的比率所决定。比如，可以将一个载波上所有资源池中的满足RSSI阈值的sub-channel的比率作为该载波的CBR。应理解，一个资源池在频域上包括L个连续子信道。
举例来说，假设载波1上的资源池为资源池1、资源池2和资源池3，资源池1、资源池2和资源池3在频域上分别包括3、4和6个子信道。若资源池1的3个子信道中有1个信道大于接收信号强度指示(received signal strength indicator，RSSI)阈值，资源池2的4个子信道中有2个信道大于RSSI阈值，资源池3的6个子信道中没有一个信道大于RSSI阈值，则载波1上所有资源池中满足RSSI阈值的子信道的比率为0.83(即，0.33+0.5)，那么，载波1的CBR为0.83。
示例5：一个载波的CBR是由该载波上各个资源池的CBR按照加权平均数的方式计算得出。
举例来说，任一资源池的CBR的权重可以通过下述两种方式确定：
1)该资源池的子信道数占该载波上所有资源池中子信道总数的比例。
比如，某一载波上有两个资源池，即，资源池1和资源池2，其中，资源池1有有2个子信道，资源池2有3个子信道。那么，资源池1的CBR的权重为0.4，资源池1的CBR的权重为0.6，该载波的CBR＝(资源池1的CBR*0.4+资源池2的CBR*0.6)/2。
2)该资源池中RB数占该载波上所有资源池RB数的比例。示例6：定义一个载波粒度的CBR测量方式，网络设备单独提供一套用于测量载波粒度的CBR的参数，基本原理也是计算超过一定阈值的子信道数占所有配置子信道数的比例。这些参数可以包括：
1)测量阈值：如果一个子信道测量到出其RSSI超过(预先配置的)阈值，这个子信道被认为被占用。这里测量阈值指的是RSSI阈值，可以考虑的是其他的测量值，例如RSRP、RSRQ。
2)时域上：在时隙(slot)n上的CBR可以通过测量感知测量窗slot[n-a,n-1]上的CBR获得，其中a＝100or 100*2^μ，可选地，a为任意一个整数。
3)频域上:子信道的起始RB位置是载波的起始RB位置，覆盖整个载波的频带，所谓覆盖指的是，子信道应当分布在载波频谱带宽的所有位置。测量载波的CBR的子信道在频域上是连续的，或者是间隔的，间隔设置可以为N个子信道也可以是N个RB。N的值的取值为较小的整数。
上文描述了本申请提供的方法实施例，下文将描述本申请提供的装置实施例。应理解，装置实施例的描述与方法实施例的描述相互对应，因此，未详细描述的内容可以参见上文方法实施例，为了简洁，这里不再赘述。
图7是本申请实施例提供的通信装置的示意性框图。如图7所示，该通信装置2000可以包括通信单元2100和处理单元2200。通信单元2100可以实现相应的通信功能，该通信可以是该通信装置2000的内部通信也可以是该通信装置2000与其他装置的通信，比如接收或发送测量结果；处理单元2200可以实现相应的处理功能，比如测量载波的CBR或确定候选载波。通信单元2100还可以称为通信接口或收发单元。可选地，该通信装置2000还可以包括存储单元，该存储单元可以用于存储指令和/或数据，处理单元2200可以读取存储单元中的指令和/或数据，以使得装置实现前述方法实施例。
在一种可能的设计中，该通信装置2000可以是上文任一方法实施例中第一终端设备，还可以是应用于第一终端设备的模块或芯片。该通信装置2000可以用于执行上述任一方法实施例中第一终端设备所执行的步骤或流程。
例如，一种实现方式中，该通信装置2000可以对应于上文方法200或方法300或方法400中的第一终端设备，并且可以执行方法200或方法300或方法400中的第一终端设备所执行的步骤或流程。
具体地，通信单元2100用于，接收来自第二终端设备的第一测量结果，所述第一测量结果包括所述第二终端设备测量得到的第一载波列表中每个载波的信道繁忙率CBR，或者，所述第一测量结果包括第二载波列表，所述第二载波列表由所述第一载波列表中的至少一个第一载波构成，所述第二终端设备测量到的所述第一载波的CBR低于对应的CBR阈值；处理单元2200用于，根据所述第一测量结果和第二测量结果，确定候选载波，所述第二测量结果包括所述通信装置2000测量得到的所述第一载波列中每个载波的CBR，或者，所述第二测量结果包括所述通信装置2000测量得到的所述第二载波列表中每个载波的CBR，所述候选载波用于通过所述通信装置2000通过与所述第二终端设备之间的侧行链路发送数据。
可选地，所述第一载波列表为所述通信装置2000上层配置的载波列表、网络能够支持的载波列表、所述通信装置2000能够支持的载波列表、或者前述任意两种或三种的交集；以及，处理单 元2200还用于确定所述第一载波列表；通信单元2100还用于向所述第二终端设备发送所述第一载波列表。
可选地，所述第一载波列表为所述通信装置2000和所述第二终端设备均支持的载波列表；以及，通信单元2100还用于，向所述第二终端设备发送配置消息，所述配置信息包括所述第一载波列表和反馈周期，所述配置消息用于所述第二终端设备根据所述反馈周期周期性的反馈所述第一载波列表中每个载波的CBR；通信单元2100具体用于：接收所述第二终端设备根据所述反馈周期反馈的所述第一测量结果。
可选地，所述第一载波列表为所述第二终端设备上层配置的载波列表、网络能够支持的载波列表、所述第二终端设备能够支持的载波列表、或者前述任意两种或三种的交集。
可选地，所述第一测量结果包括所述第二终端设备测量得到的所述第一载波列表中每个载波的CBR；其中，处理单元2200具体用于：对于所述第一载波列表中的任一载波，在所述载波满足第一条件的情况下，将所述载波确定为所述候选载波；或者，在所述第一载波列表的所有载波上都没有侧行链路授权的情况下，对于所述第一载波列表中的任一载波，在所述载波满足所述第一条件的情况下，将所述载波确定为所述候选载波；或者，在所述第一载波列表中的部分或全部载波上有侧行链路授权的情况下，对于所述第一载波列表中触发了载波选择的任一载波，在所述载波满足第二条件的情况下，将所述载波确定为所述候选载波，对于所述第一载波列表中未触发载波选择的任一载波，在所述载波满足所述第一条件的情况下，将所述载波确定为所述候选载波；其中，所述第一条件为所述通信装置2000测量得到的所述载波的CBR低于所述载波对应的第一CBR载波选择阈值，且所述第二终端设备测量得到的所述载波的CBR低于所述载波对应的第二CBR载波选择阈值，或者，所述第一条件为所述通信装置2000测量得到的所述载波的CBR和所述第二终端设备测量得到的所述载波的CBR的均值低于所述载波对应的第一CBR载波选择阈值或所述载波对应的所述第二CBR载波选择阈值；所述第二条件为所述通信装置2000测量得到的所述载波的CBR低于所述载波对应的第一CBR载波保留阈值，且所述第二终端设备测量得到的所述载波的CBR低于所述载波对应的第二CBR载波保留阈值，或者，所述第二条件为所述通信装置2000测量得到的所述载波的CBR和所述第二终端设备测量得到的所述载波的CBR的均值低于所述载波对应的第一CBR载波保留阈值或所述载波对应的所述第二CBR载波保留阈值。
可选地，所述第一测量结果包括第二载波列表；其中，处理单元2200具体用于：对于所述第二载波列表中的任一载波，在所述载波满足第一条件的情况下，将所述载波确定为所述候选载波；或者，在所述第二载波列表的所有载波上都没有侧行链路授权的情况下，对于所述第二载波列表中的任一载波，在所述载波满足所述第一条件的情况下，将所述载波确定为所述候选载波；或者，在所述第二载波列表的部分或全部载波上有侧行链路授权的情况下，对于所述第二载波列表中触发了载波选择的任一载波，在所述载波满足第二条件的情况下，将所述载波确定为所述候选载波，对于所述第二载波列表中未触发载波选择的任一载波，在所述载波满足所述第一条件的情况下，将所述载波确定为所述候选载波；其中，所述第一条件为所述通信装置2000测量得到的所述载波的CBR低于所述载波对应的第一CBR载波选择阈值；所述第二条件为所述通信装置2000测量得到的所述载波的CBR低于所述载波对应的第一CBR载波保留阈值。
可选地，所述第一测量结果还包括所述第二载波列表中每个载波的CBR。
可选地，处理单元2200具体用于：对于所述第二载波列表中的任一载波，在所述载波满足第一条件的情况下，将所述载波确定为所述候选载波；或者，在所述第二载波列表的所有载波上都没有侧行链路授权的情况下，对于所述第二载波列表中的任一载波，在所述载波满足所述第一条件的情况下，将所述载波确定为所述候选载波；或者，在所述第二载波列表中的部分或全部载波上有侧行链路授权的情况下，对于所述第二载波列表中触发了载波选择的任一载波，在所述载波满足第二条件的情况下，将所述载波确定为所述候选载波，对于所述第二载波列表中未触发载波选择的任一载波，在所述载波满足所述第一条件的情况下，将所述载波确定为所述候选载波；其中，所述第一条件为所述通信装置2000测量得到的所述载波的CBR和所述第二终端设备测量得到的所述载波的CBR的均值低于所述载波对应的第一CBR载波选择阈值或所述载波对应的所述第二CBR载波选择阈值；所述第二条件为所述通信装置2000测量得到的所述载波的CBR和所述 第二终端设备测量得到的所述载波的CBR的均值低于所述载波对应的第一CBR载波保留阈值或所述载波对应的所述第二CBR载波保留阈值。
可选地，所述第一测量结果还包括所述第二CBR载波选择阈值和/或所述第二CBR载波保留阈值。
可选地，通信单元2100还用于，向所述第二终端设备发送所述数据的优先级或所述数据对应的逻辑信道的优先级，所述数据的优先级或所述数据对应的逻辑信道的优先级用于所述第二终端设备确定所述第二CBR载波选择阈值和/或所述第二CBR载波保留阈值。
可选地，通信单元2100还用于，向所述第二终端设备发送所述第二CBR载波选择阈值和/或所述第二CBR载波保留阈值。
另一种实现方式中，该通信装置2000可以对应于上文方法500中的第一终端设备，并且可以执行方法500中的第一终端设备所执行的步骤或流程。
具体地，处理单元2200用于，测量第一载波列表中每个载波的CBR，所述第一载波列表为所述通信装置2000上层配置的载波列表、网络能够支持的载波列表、所述通信装置2000能够支持的载波列表、或者前述任意两种或三种的交集；通信单元2100用于，向所述第二终端设备发送第一测量结果，所述第一测量结果包括所述第一载波列表中每个载波的CBR，或者，所述第一测量结果包括第二载波列表，所述第二载波列表由所述第一载波列表中的至少一个第一载波构成，所述通信装置2000测量到的所述第一载波的CBR低于对应的CBR阈值；通信单元2100还用于，接收来自所述第二终端设备的候选载波的信息，所述候选载波是所述第二终端设备根据所述第一测量结果和所述第二终端设备对所述第一载波列表或所述第二载波列表中的每个载波的CBR测量得到的，所述候选载波用于通过所述通信装置2000通过与所述第二终端设备之间的侧行链路发送数据。
可选地，处理单元2200还用于：对于所述第一载波列表中的任一载波，在所述载波满足第一条件的情况下，将所述载波确定为所述第一载波；或者，在所述第一载波列表的所有载波上都没有侧行链路授权的情况下，对于所述第一载波列表中的任一载波，在所述载波满足所述第一条件的情况下，将所述载波确定为所述第一载波；或者，在所述第一载波列表中的部分或全部载波上有侧行链路授权的情况下，对于所述第一载波列表中触发了载波选择的任一载波，在所述载波满足第二条件的情况下，将所述载波确定为所述第一载波，对于所述第一载波列表中未触发载波选择的任一载波，在所述载波满足所述第一条件的情况下，将所述载波确定为所述第一载波；其中，所述第一条件为所述通信装置2000测量得到的所述载波的CBR低于所述载波对应的第一CBR载波选择阈值；所述第二条件为所述通信装置2000测量得到的所述载波的CBR低于所述载波对应的第一CBR载波保留阈值。
可选地，所述第一测量结果还包括所述第二载波列表中每个载波的CBR。
可选地，所述第一测量结果还包括下述中的一项或多项阈值信息：第一CBR载波选择阈值、第一CBR载波保留阈值、第二CBR载波选择阈值、或者第二CBR载波保留阈值，所述阈值信息用于所述第二终端设备确定所述候选载波。
可选地，所述第一测量结果还包括所述数据的优先级或所述数据对应的逻辑信道的优先级，所述数据的优先级或所述数据对应的逻辑信道的优先级用于所述第二终端设备确定第二CBR载波选择阈值和/或第二CBR载波保留阈值，所述第二CBR载波选择阈值和/或所述第二CBR载波保留阈值用于所述第二终端设备确定所述候选载波。
在另一种可能的设计中，该通信装置2000可以是上文任一方法实施例中第二终端设备，还可以是应用于第二终端设备的模块或芯片。该通信装置2000可以用于执行上述任一方法实施例中第二终端设备所执行的步骤或流程。
例如，一种实现方式中，该通信装置2000可以对应于上文方法200或方法300或方法400中的第二终端设备，并且可以执行方法200或方法300或方法400中的第二终端设备所执行的步骤或流程。
具体地，处理单元2200用于确定第一测量结果，所述第一测量结果包括所述通信装置2000测量得到的第一载波列表中每个载波的信道繁忙率CBR，或者，所述第一测量结果包括第二载波 列表，所述第二载波列表由所述第一载波列表中的至少一个第一载波构成，所述通信装置2000测量到的所述第一载波的CBR低于对应的CBR阈值；通信单元2100用于，向第一终端设备发送所述第一测量结果，所述第一测量结果用于所述第一终端设备确定候选载波，所述候选载波用于通过所述第一终端设备通过与所述通信装置2000之间的侧行链路发送数据。
可选地，所述第一载波列表为所述第一终端设备上层配置的载波列表、网络能够支持的载波列表、所述第一终端设备能够支持的载波列表、或者前述任意两种或三种的交集；以及，通信单元2100还用于，接收来自所述第一终端设备的所述第一载波列表。
可选地，所述第一载波列表为所述第一终端设备和所述通信装置2000均支持的载波列表；以及，通信单元2100还用于，接收来自所述第一终端设备的配置消息，所述配置消息包括所述第一载波列表和反馈周期，所述配置消息用于所述通信装置2000根据所述反馈周期周期性的反馈所述第一载波列表中每个载波的CBR；通信单元2100具体用于，根据所述反馈周期向所述第一终端设备发送所述第一测量结果。
可选地，所述第一载波列表为所述通信装置2000上层配置的载波列表、网络能够支持的载波列表、所述通信装置2000能够支持的载波列表、或者前述任意两种或三种的交集。
可选地，所述第一测量结果还包括所述第二载波列表中每个载波的CBR。
可选地，处理单元2200具体用于：测量所述第一载波列表中每个载波的CBR；对于所述第一载波列表中的任一载波，在所述载波满足第三条件的情况下，将所述载波确定为所述第一载波；或者，在所述第一载波列表的所有载波上都没有侧行链路授权的情况下，对于所述第一载波列表中的任一载波，在所述载波满足所述第三条件的情况下，将所述载波确定为所述第一载波；或者，在所述第一载波列表中的部分或全部载波上有侧行链路授权的情况下，对于所述第一载波列表中触发了载波选择的任一载波，在所述载波满足第四条件的情况下，将所述载波确定为所述第一载波，对于所述第一载波列表中未触发载波选择的任一载波，在所述载波满足所述第三条件的情况下，将所述载波确定为所述第一载波；其中，所述第三条件为所述通信装置2000测量得到的所述载波的CBR低于所述载波对应的第二CBR载波选择阈值；所述第四条件为所述通信装置2000测量得到的所述载波的CBR低于所述载波对应的第二CBR载波保留阈值。
可选地，所述第一测量结果还包括所述第二CBR载波选择阈值和/或所述第二CBR载波保留阈值。
可选地，通信单元2100还用于，接收来自所述第一终端设备的所述数据的优先级或所述数据对应的逻辑信道的优先级；处理单元2200还用于，根据所述数据的优先级或所述数据对应的逻辑信道的优先级确定所述第二CBR载波选择阈值和/或所述第二CBR载波保留阈值。
可选地，通信单元2100还用于，接收来自所述第一终端设备的所述第二CBR载波选择阈值和/或所述第二CBR载波保留阈值。
一种实现方式中，该通信装置2000可以对应于上文方法500中的第二终端设备，并且可以执行方法500中的第二终端设备所执行的步骤或流程。
具体地，通信单元2100用于，接收来自第一终端设备的第一测量结果，所述第一测量结果包括所述第一终端设备测量得到的第一载波列表中每个载波的CBR，或者，所述第一测量结果包括第二载波列表，所述第一载波列表为所述第一终端设备上层配置的载波列表、网络能够支持的载波列表、所述第一终端设备能够支持的载波列表、或者前述任意两种或三种的交集，所述第二载波列表由所述第一载波列表中的至少一个第一载波构成，所述第一终端设备测量到的所述第一载波的CBR低于对应的CBR阈值；处理单元2200用于，测量所述第一载波列表或所述第二载波列表中每个载波的CBR，得到第二测量结果；处理单元2200还用于，根据所述第一测量结果和所述第二测量结果，确定候选载波，所述候选载波用于通过所述第一终端设备通过与所述通信装置2000之间的侧行链路发送数据；通信单元2100还用于，向所述第一终端发送所述候选载波的信息。
可选地，所述第一测量结果包括所述第一载波列表中每个载波的CBR；其中，处理单元2200具体用于：对于所述第一载波列表中的任一载波，在所述载波满足第三条件的情况下，将所述载波确定为所述候选载波；或者，在所述第一载波列表的所有载波上都没有侧行链路授权的情况下， 对于所述第一载波列表中的任一载波，在所述载波满足所述第三条件的情况下，将所述载波确定为所述候选载波；或者，在所述第一载波列表中的部分或全部载波上有侧行链路授权的情况下，对于所述第一载波列表中触发了载波选择的任一载波，在所述载波满足第四条件的情况下，将所述载波确定为所述候选载波，对于所述第一载波列表中未触发载波选择的任一载波，在所述载波满足所述第三条件的情况下，将所述载波确定为所述候选载波；其中，所述第三条件为所述第一终端设备测量得到的所述载波的CBR低于所述载波对应的第一CBR载波选择阈值，且所述通信装置2000测量得到的所述载波的CBR低于所述载波对应的第二CBR载波选择阈值，或者，所述第三条件为所述第一终端设备测量得到的所述载波的CBR和所述通信装置2000测量得到的所述载波的CBR的均值低于所述载波对应的第一CBR载波选择阈值或所述载波对应的所述第二CBR载波选择阈值；所述第四条件为所述第一终端设备测量得到的所述载波的CBR低于所述载波对应的第一CBR载波保留阈值，且所述通信装置2000测量得到的所述载波的CBR低于所述载波对应的第二CBR载波保留阈值，或者，所述第四条件为所述第一终端设备测量得到的所述载波的CBR和所述通信装置2000测量得到的所述载波的CBR的均值低于所述载波对应的第一CBR载波保留阈值或所述载波对应的所述第二CBR载波保留阈值。
可选地，所述第一测量结果还包括所述第二载波列表中每个载波的CBR。
可选地，所述第一测量结果包括所述第二载波列表；其中，处理单元2200具体用于：对于所述第二载波列表中的任一载波，在所述载波满足第三条件的情况下，将所述载波确定为所述候选载波；或者，在所述第二载波列表的所有载波上都没有侧行链路授权的情况下，对于所述第二载波列表中的任一载波，在所述载波满足所述第三条件的情况下，将所述载波确定为所述候选载波；或者，在所述第二载波列表的部分或全部载波上有侧行链路授权的情况下，对于所述第二载波列表中触发了载波选择的任一载波，在所述载波满足第四条件的情况下，将所述载波确定为所述候选载波，对于所述第二载波列表中未触发载波选择的任一载波，在所述载波满足所述第三条件的情况下，将所述载波确定为所述候选载波；其中，所述第三条件为所述通信装置2000测量得到的所述载波的CBR低于所述载波对应的第二CBR载波选择阈值；所述第四条件为所述通信装置2000测量得到的所述载波的CBR低于所述载波对应的第二CBR载波保留阈值。
可选地，处理单元2200具体用于：对于所述第二载波列表中的任一载波，在所述载波满足第三条件的情况下，将所述载波确定为所述候选载波；或者，在所述第二载波列表的所有载波上都没有侧行链路授权的情况下，对于所述第二载波列表中的任一载波，在所述载波满足所述第三条件的情况下，将所述载波确定为所述候选载波；或者，在所述第二载波列表中的部分或全部载波上有侧行链路授权的情况下，对于所述第二载波列表中触发了载波选择的任一载波，在所述载波满足第四条件的情况下，将所述载波确定为所述候选载波，对于所述第二载波列表中未触发载波选择的任一载波，在所述载波满足所述第三条件的情况下，将所述载波确定为所述候选载波；其中，所述第三条件为所述第一终端设备测量得到的所述载波的CBR和所述通信装置2000测量得到的所述载波的CBR的均值低于所述载波对应的第一CBR载波选择阈值或所述载波对应的所述第二CBR载波选择阈值；所述第四条件为所述第一终端设备测量得到的所述载波的CBR和所述通信装置2000测量得到的所述载波的CBR的均值低于所述载波对应的第一CBR载波保留阈值或所述载波对应的所述第二CBR载波保留阈值。
可选地，所述第一测量结果还包括下述中的一项或多项：所述第一CBR载波选择阈值、所述第一CBR载波保留阈值所述第二CBR载波选择阈值、或者所述第二CBR载波保留阈值。
可选地，所述第一测量结果还包括所述数据的优先级或所述数据对应的逻辑信道的优先级；以及，处理单元2200还用于，根据所述数据的优先级或所述数据对应的逻辑信道的优先级，确定所述第二CBR载波选择阈值和/或所述第二CBR载波保留阈值。
应理解，通信装置2000中的“单元”可以通过硬件实现，也可以通过软件实现，还可以通过硬件执行相应的软件实现。比如，所述“单元”可以指应用特有集成电路(application specific integrated circuit，ASIC)、电子电路、用于执行一个或多个软件或固件程序的处理器(例如共享处理器、专有处理器或组处理器等)和存储器、合并逻辑电路和/或其它支持所描述的功能的合适组件。又如，通信单元2100可以由收发机收发电路(例如可以包括接收电路和发送电路)替代，处理单元 2200可以由处理器或处理电路替代。
图8示出了本申请实施例提供的另一通信装置3000的示意性框图。该装置3000可以是第一终端设备，也可以是第二终端设备，也可以是支持第一终端设备实现上述方法的芯片、芯片系统、或处理器等，还可以是支持第二终端设备实现上述方法的芯片、芯片系统、或处理器等。该装置可用于实现上述方法实施例中描述的方法，具体可以参见上述方法实施例中的说明。
该装置3000可以包括一个或多个处理器3100，所述处理器3100也可以称为处理单元，可以实现一定的控制功能。所述处理器3100可以是通用处理器或者专用处理器等。例如可以是基带处理器或中央处理器。基带处理器可以用于对通信协议以及通信数据进行处理，中央处理器可以用于对通信装置(如，基站、基带芯片，用于、用户芯片，DU或CU等)进行控制，执行软件程序，处理软件程序的数据。
在一种可选的设计中，处理器3100也可以存有指令和/或数据，所述指令和/或数据可以被所述处理器3100运行，使得所述装置3000执行上述方法实施例中描述的方法。
在另一种可选的设计中，该装置3000可以包括用于实现接收和发送功能的收发器3200。例如该收发器3200可以是收发电路，或者是接口，或者是接口电路。用于实现接收和发送功能的收发电路、接口或接口电路可以是分开的，也可以集成在一起。上述收发电路、接口或接口电路可以用于代码/数据的读写，或者，上述收发电路、接口或接口电路可以用于信号的传输或传递。
在又一种可能的设计中，该装置3000可以包括电路，该电路可以实现前述方法实施例中发送或接收或者通信的功能。
可选地，该装置3000中可以包括一个或多个存储器3300，其上可以存有指令，该指令可在处理器3100上被运行，使得该装置3000执行上述方法实施例中描述的方法。可选的，存储器3300中还可以存储有数据。可选的，处理器3100中也可以存储指令和/或数据。处理器3100和存储器3300可以单独设置，也可以集成在一起。
图9为本申请提供的一种终端设备4000的结构示意图。上述通信装置2000或者通信装置3000可以配置在该终端设备4000中。或者，该通信装置2000或者通信装置3000本身可以即为该终端设备4000。或者说，该终端设备4000可以执行上述方法实施例中终端设备执行的动作。可选的，为了便于说明，图9仅示出了终端设备的主要部件。如图9所示，终端设备4000包括处理器、存储器、控制电路、天线以及输入输出装置。
处理器主要用于对通信协议以及通信数据进行处理，以及对整个终端设备进行控制，执行软件程序，处理软件程序的数据，例如用于支持终端设备执行上述方法实施例中所描述的动作。存储器主要用于存储软件程序和数据。控制电路主要用于基带信号与射频信号的转换以及对射频信号的处理。控制电路和天线一起也可以叫做收发器，主要用于收发电磁波形式的射频信号。输入输出装置，例如触摸屏、显示屏，键盘等主要用于接收用户输入的数据以及对用户输出数据。
当终端设备开机后，处理器可以读取存储单元中的软件程序，解释并执行软件程序的指令，处理软件程序的数据。当需要通过无线发送数据时，处理器对待发送的数据进行基带处理后，输出基带信号至射频电路，射频电路将基带信号进行射频处理后将射频信号通过天线以电磁波的形式向外发送。当有数据发送到终端设备时，射频电路通过天线接收到射频信号，将射频信号转换为基带信号，并将基带信号输出至处理器，处理器将基带信号转换为数据并对该数据进行处理。
本领域技术人员可以理解，为了便于说明，图9仅示出了一个存储器和处理器。在实际的终端设备中，可以存在多个处理器和存储器。存储器也可以称为存储介质或者存储设备等，本申请实施例对此不做限制。
例如，处理器可以包括基带处理器和中央处理器，基带处理器主要用于对通信协议以及通信数据进行处理，中央处理器主要用于对整个终端设备进行控制，执行软件程序，处理软件程序的数据。图9中的处理器集成了基带处理器和中央处理器的功能，本领域技术人员可以理解，基带处理器和中央处理器也可以是各自独立的处理器，通过总线等技术互联。本领域技术人员可以理解，终端设备可以包括多个基带处理器以适应不同的网络制式，终端设备可以包括多个中央处理器以增强其处理能力，终端设备的各个部件可以通过各种总线连接。该基带处理器也可以表述为基带处理电路或者基带处理芯片。该中央处理器也可以表述为中央处理电路或者中央处理芯片。 对通信协议以及通信数据进行处理的功能可以内置在处理器中，也可以以软件程序的形式存储在存储单元中，由处理器执行软件程序以实现基带处理功能。
示例性的，在本申请实施例中，可以将具有收发功能的天线和控制电路视为终端设备4000的收发单元4100，将具有处理功能的处理器视为终端设备4000的处理单元4200。如图9所示，终端设备4000包括收发单元4100和处理单元4200。收发单元也可以称为收发器、收发机、收发装置等。可选的，可以将收发单元4100中用于实现接收功能的器件视为接收单元，将收发单元4100中用于实现发送功能的器件视为发送单元，即收发单元4100包括接收单元和发送单元。示例性的，接收单元也可以称为接收机、接收器、接收电路等，发送单元可以称为发射机、发射器或者发射电路等。
应理解，在一种可能的设计中，本申请提供的方法实施例中的各步骤可以通过处理器中的硬件的集成逻辑电路或者软件形式的指令完成。结合本申请实施例所公开的方法的步骤可以直接体现为硬件处理器执行完成，或者用处理器中的硬件及软件模块组合执行完成。软件模块可以位于随机存储器，闪存、只读存储器，可编程只读存储器或者电可擦写可编程存储器、寄存器等本领域成熟的存储介质中。该存储介质位于存储器，处理器读取存储器中的信息，结合其硬件完成上述方法的步骤。为避免重复，这里不再详细描述。
应注意，本申请实施例中的处理器可以是一种集成电路芯片，具有信号的处理能力。在实现过程中，上述方法实施例的各步骤可以通过处理器中的硬件的集成逻辑电路或者软件形式的指令完成。上述的处理器可以是通用处理器、数字信号处理器(DSP)、专用集成电路(ASIC)、现场可编程门阵列(FPGA)或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件。可以实现或者执行本申请实施例中的公开的各方法、步骤及逻辑框图。通用处理器可以是微处理器或者该处理器也可以是任何常规的处理器等。结合本申请实施例所公开的方法的步骤可以直接体现为硬件译码处理器执行完成，或者用译码处理器中的硬件及软件模块组合执行完成。软件模块可以位于随机存储器，闪存、只读存储器，可编程只读存储器或者电可擦写可编程存储器、寄存器等本领域成熟的存储介质中。该存储介质位于存储器，处理器读取存储器中的信息，结合其硬件完成上述方法的步骤。
可以理解，本申请实施例中的存储器可以是易失性存储器或非易失性存储器，或可包括易失性和非易失性存储器两者。其中，非易失性存储器可以是只读存储器(read-only memory，ROM)、可编程只读存储器(programmable ROM，PROM)、可擦除可编程只读存储器(erasable PROM，EPROM)、电可擦除可编程只读存储器(electrically EPROM，EEPROM)或闪存。易失性存储器可以是随机存取存储器(random access memory，RAM)，其用作外部高速缓存。通过示例性但不是限制性说明，许多形式的RAM可用，例如静态随机存取存储器(static RAM，SRAM)、动态随机存取存储器(dynamic RAM，DRAM)、同步动态随机存取存储器(synchronous DRAM，SDRAM)、双倍数据速率同步动态随机存取存储器(double data rate SDRAM，DDR SDRAM)、增强型同步动态随机存取存储器(enhanced SDRAM，ESDRAM)、同步连接动态随机存取存储器(synchlink DRAM，SLDRAM)和直接内存总线随机存取存储器(direct rambus RAM，DR RAM)。应注意，本文描述的系统和方法的存储器旨在包括但不限于这些和任意其它适合类型的存储器。
本申请还提供一种计算机程序产品，该计算机程序产品包括：计算机程序代码，当该计算机程序代码在计算机上运行时，使得该计算机执行上述任一方法实施例中第一终端设备或第二终端设备所执行的各个步骤或流程。
本申请还提供一种计算机可读存储介质，该计算机可读存储介质存储有程序代码，当该程序代码在计算机上运行时，使得该计算机执行上述任一方法实施例中第一终端设备或第二终端设备所执行的各个步骤或流程。
本申请还提供一种通信系统，其包括第一终端设备和/或第二终端设备。
上述各个装置实施例和方法实施例完全对应，由相应的模块或单元执行相应的步骤，例如收发单元或收发器执行方法实施例中接收或发送的步骤，除发送、接收外的其它步骤可以由处理单元或处理器执行。
在本申请的实施例中，各术语及英文缩略语均为方便描述而给出的示例性举例，不应对本申 请构成任何限定。本申请并不排除在已有或未来的协议中定义其它能够实现相同或相似功能的术语的可能。
在本说明书中使用的术语“部件”、“模块”、“系统”等用于表示计算机相关的实体、硬件、固件、硬件和软件的组合、软件、或执行中的软件。例如，部件可以是但不限于，在处理器上运行的进程、处理器、对象、可执行文件、执行线程、程序和/或计算机。通过图示，在计算设备上运行的应用和计算设备都可以是部件。一个或多个部件可驻留在进程和/或执行线程中，部件可位于一个计算机上和/或分布在两个或更多个计算机之间。此外，这些部件可从在上面存储有各种数据结构的各种计算机可读存储介质执行。部件可例如根据具有一个或多个数据分组(例如来自与本地系统、分布式系统和/或网络间的另一部件交互的二个部件的数据，例如通过信号与其它系统交互的互联网)的信号通过本地和/或远程进程来通信。
本领域普通技术人员可以意识到，结合本文中所公开的实施例描述的各种说明性逻辑块(illustrative logical block)和步骤(step)，能够以电子硬件、或者计算机软件和电子硬件的结合来实现。这些功能究竟以硬件还是软件方式来执行，取决于技术方案的特定应用和设计约束条件。专业技术人员可以对每个特定的应用来使用不同方法来实现所描述的功能，但是这种实现不应认为超出本申请的范围。
所属领域的技术人员可以清楚地了解到，为描述的方便和简洁，上述描述的系统、装置和单元的具体工作过程，可以基于前述方法实施例中的对应过程，在此不再赘述。
在本申请所提供的几个实施例中，应该理解到，所揭露的系统、装置和方法，可以通过其它的方式实现。例如，以上所描述的装置实施例仅仅是示意性的，例如，所述单元的划分，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式，例如多个单元或组件可以结合或者可以集成到另一个系统，或一些特征可以忽略，或不执行。另一点，所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口，装置或单元的间接耦合或通信连接，可以是电性，机械或其它的形式。
所述作为分离部件说明的单元可以是或者也可以不是物理上分开的，作为单元显示的部件可以是或者也可以不是物理单元，即可以位于一个地方，或者也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或者全部单元来实现本实施例方案的目的。
另外，在本申请各个实施例中的各功能单元可以集成在一个处理单元中，也可以是各个单元单独物理存在，也可以两个或两个以上单元集成在一个单元中。
在上述实施例中，各功能单元的功能可以全部或部分地通过软件、硬件、固件或者其任意组合来实现。当使用软件实现时，可以全部或部分地以计算机程序产品的形式实现。所述计算机程序产品包括一个或多个计算机指令(程序)。在计算机上加载和执行所述计算机程序指令(程序)时，全部或部分地产生按照本申请实施例所述的流程或功能。所述计算机可以是通用计算机、专用计算机、计算机网络、或者其他可编程装置。所述计算机指令可以存储在计算机可读存储介质中，或者从一个计算机可读存储介质向另一个计算机可读存储介质传输，例如，所述计算机指令可以从一个网站站点、计算机、服务器或数据中心通过有线(例如同轴电缆、光纤、数字用户线(DSL))或无线(例如红外、无线、微波等)方式向另一个网站站点、计算机、服务器或数据中心进行传输。所述计算机可读存储介质可以是计算机能够存取的任何可用介质或者是包含一个或多个可用介质集成的服务器、数据中心等数据存储设备。所述可用介质可以是磁性介质，(例如，软盘、硬盘、磁带)、光介质(例如，DVD)、或者半导体介质(例如固态硬盘(solid state disk，SSD))等。
所述功能如果以软件功能单元的形式实现并作为独立的产品销售或使用时，可以存储在一个计算机可读存储介质中。基于这样的理解，本申请的技术方案本质上或者说对现有技术做出贡献的部分或者该技术方案的部分可以以软件产品的形式体现出来，该计算机软件产品存储在一个存储介质中，包括若干指令用以使得一台计算机设备(可以是个人计算机，服务器，或者网络设备等)执行本申请各个实施例所述方法的全部或部分步骤。而前述的存储介质包括：U盘、移动硬盘、只读存储器(read-only memory，ROM)、随机存取存储器(random access memory，RAM)、磁碟或者光盘等各种可以存储程序代码的介质。
以上所述，仅为本申请的具体实施方式，但本申请的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本申请揭露的技术范围内，可轻易想到变化或替换，都应涵盖在本申请的保护范围之内。因此，本申请的保护范围应以所述权利要求的保护范围为准。

Claims (37)

  1. 一种通信方法，其特征在于，应用于第一终端设备，所述方法包括：
    接收来自第二终端设备的第一测量结果，所述第一测量结果包括所述第二终端设备测量得到的第一载波列表中每个载波的信道繁忙率CBR，或者，所述第一测量结果包括第二载波列表，所述第二载波列表由所述第一载波列表中的至少一个第一载波构成，所述第二终端设备测量到的所述第一载波的CBR低于对应的CBR阈值；
    根据所述第一测量结果和第二测量结果，确定候选载波，所述第二测量结果包括所述第一终端设备测量得到的所述第一载波列中每个载波的CBR，或者，所述第二测量结果包括所述第一终端设备测量得到的所述第二载波列表中每个载波的CBR，所述候选载波用于通过所述第一终端设备通过与所述第二终端设备之间的侧行链路发送数据。
  2. 如权利要求1所述的方法，其特征在于，所述第一载波列表为所述第一终端设备上层配置的载波列表、网络能够支持的载波列表、所述第一终端设备能够支持的载波列表、或者前述任意两种或三种的交集；
    以及，在所述接收来自第二终端设备的第一测量结果之前，所述方法还包括：
    确定所述第一载波列表；
    向所述第二终端设备发送所述第一载波列表。
  3. 如权利要求1所述的方法，其特征在于，所述第一载波列表为所述第一终端设备和所述第二终端设备均支持的载波列表；
    以及，在所述接收来自第二终端设备的第一测量结果之前，所述方法还包括：
    向所述第二终端设备发送配置消息，所述配置消息包括所述第一载波列表和反馈周期，所述配置消息用于所述第二终端设备根据所述反馈周期周期性的反馈所述第一载波列表中每个载波的CBR；
    其中，所述接收来自第二终端设备的第一测量结果，包括：
    接收所述第二终端设备根据所述反馈周期反馈的所述第一测量结果。
  4. 如权利要求1所述的方法，其特征在于，所述第一载波列表为所述第二终端设备上层配置的载波列表、网络能够支持的载波列表、所述第二终端设备能够支持的载波列表、或者前述任意两种或三种的交集。
  5. 如权利要求1-4中任一项所述的方法，其特征在于，所述第一测量结果包括所述第二终端设备测量得到的所述第一载波列表中每个载波的CBR；
    其中，所述根据所述第一测量结果和第二测量结果，确定候选载波，包括：
    对于所述第一载波列表中的任一载波，在所述载波满足第一条件的情况下，将所述载波确定为所述候选载波；或者，
    在所述第一载波列表的所有载波上都没有侧行链路授权的情况下，对于所述第一载波列表中的任一载波，在所述载波满足所述第一条件的情况下，将所述载波确定为所述候选载波；或者，
    在所述第一载波列表中的部分或全部载波上有侧行链路授权的情况下，对于所述第一载波列表中触发了载波选择的任一载波，在所述载波满足第二条件的情况下，将所述载波确定为所述候选载波，对于所述第一载波列表中未触发载波选择的任一载波，在所述载波满足所述第一条件的情况下，将所述载波确定为所述候选载波；
    其中，所述第一条件为所述第一终端设备测量得到的所述载波的CBR低于所述载波对应的第一CBR载波选择阈值，且所述第二终端设备测量得到的所述载波的CBR低于所述载波对应的第二CBR载波选择阈值，或者，所述第一条件为所述第一终端设备测量得到的所述载波的CBR和所述第二终端设备测量得到的所述载波的CBR的均值低于所述载波对应的第一CBR载波选择阈值或所述载波对应的所述第二CBR载波选择阈值；
    所述第二条件为所述第一终端设备测量得到的所述载波的CBR低于所述载波对应的第一CBR载波保留阈值，且所述第二终端设备测量得到的所述载波的CBR低于所述载波对应的第二CBR载波保留阈值，或者，所述第二条件为所述第一终端设备测量得到的所述载波的CBR和所 述第二终端设备测量得到的所述载波的CBR的均值低于所述载波对应的第一CBR载波保留阈值或所述载波对应的所述第二CBR载波保留阈值。
  6. 如权利要求1-4中任一项所述的方法，其特征在于，所述第一测量结果包括第二载波列表；
    其中，所述根据所述第一测量结果和所述第二测量结果，确定候选载波，包括：
    对于所述第二载波列表中的任一载波，在所述载波满足第一条件的情况下，将所述载波确定为所述候选载波；或者，
    在所述第二载波列表的所有载波上都没有侧行链路授权的情况下，对于所述第二载波列表中的任一载波，在所述载波满足所述第一条件的情况下，将所述载波确定为所述候选载波；或者，
    在所述第二载波列表的部分或全部载波上有侧行链路授权的情况下，对于所述第二载波列表中触发了载波选择的任一载波，在所述载波满足第二条件的情况下，将所述载波确定为所述候选载波，对于所述第二载波列表中未触发载波选择的任一载波，在所述载波满足所述第一条件的情况下，将所述载波确定为所述候选载波；
    其中，所述第一条件为所述第一终端设备测量得到的所述载波的CBR低于所述载波对应的第一CBR载波选择阈值；
    所述第二条件为所述第一终端设备测量得到的所述载波的CBR低于所述载波对应的第一CBR载波保留阈值。
  7. 如权利要求1-4中任一项所述的方法，其特征在于，所述第一测量结果还包括所述第二载波列表中每个载波的CBR。
  8. 如权利要求7所述的方法，其特征在于，所述根据所述第一测量结果和所述第二测量结果，确定候选载波，包括：
    对于所述第二载波列表中的任一载波，在所述载波满足第一条件的情况下，将所述载波确定为所述候选载波；或者，
    在所述第二载波列表的所有载波上都没有侧行链路授权的情况下，对于所述第二载波列表中的任一载波，在所述载波满足所述第一条件的情况下，将所述载波确定为所述候选载波；或者，
    在所述第二载波列表中的部分或全部载波上有侧行链路授权的情况下，对于所述第二载波列表中触发了载波选择的任一载波，在所述载波满足第二条件的情况下，将所述载波确定为所述候选载波，对于所述第二载波列表中未触发载波选择的任一载波，在所述载波满足所述第一条件的情况下，将所述载波确定为所述候选载波；
    其中，所述第一条件为所述第一终端设备测量得到的所述载波的CBR和所述第二终端设备测量得到的所述载波的CBR的均值低于所述载波对应的第一CBR载波选择阈值或所述载波对应的第二CBR载波选择阈值；
    所述第二条件为所述第一终端设备测量得到的所述载波的CBR和所述第二终端设备测量得到的所述载波的CBR的均值低于所述载波对应的第一CBR载波保留阈值或所述载波对应的所述第二CBR载波保留阈值。
  9. 如权利要求5或8所述的方法，其特征在于，所述第一测量结果还包括所述第二CBR载波选择阈值和/或所述第二CBR载波保留阈值。
  10. 如权利要求5、8或9所述的方法，其特征在于，在所述接收来自第二终端设备的第一测量结果之前，所述方法还包括：
    向所述第二终端设备发送所述数据的优先级或所述数据对应的逻辑信道的优先级，所述数据的优先级或所述数据对应的逻辑信道的优先级用于所述第二终端设备确定所述第二CBR载波选择阈值和/或所述第二CBR载波保留阈值。
  11. 如权利要求5或8所述的方法，其特征在于，在所述接收来自第二终端设备的第一测量结果之前，所述方法还包括：
    向所述第二终端设备发送所述第二CBR载波选择阈值和/或所述第二CBR载波保留阈值。
  12. 一种通信方法，其特征在于，应用于第二终端设备，所述方法包括：
    确定第一测量结果，所述第一测量结果包括所述第二终端设备测量得到的第一载波列表中每个载波的信道繁忙率CBR，或者，所述第一测量结果包括第二载波列表，所述第二载波列表由所 述第一载波列表中的至少一个第一载波构成，所述第二终端设备测量到的所述第一载波的CBR低于对应的CBR阈值；
    向第一终端设备发送所述第一测量结果，所述第一测量结果用于所述第一终端设备确定候选载波，所述候选载波用于通过所述第一终端设备通过与所述第二终端设备之间的侧行链路发送数据。
  13. 如权利要求12所述的方法，其特征在于，所述第一载波列表为所述第一终端设备上层配置的载波列表、网络能够支持的载波列表、所述第一终端设备能够支持的载波列表、或者前述任意两种或三种的交集；
    以及，在所述确定第一测量结果之前，所述方法还包括：
    接收来自所述第一终端设备的所述第一载波列表。
  14. 如权利要求12所述的方法，其特征在于，所述第一载波列表为所述第一终端设备和所述第二终端设备均支持的载波列表；
    以及，在所述确定第一测量结果之前，所述方法还包括：
    接收来自所述第一终端设备的配置消息，所述配置消息包括所述第一载波列表和反馈周期，所述配置消息用于所述第二终端设备根据所述反馈周期周期性的反馈所述第一载波列表中每个载波的CBR；
    其中，所述向第一终端设备发送所述第一测量结果，包括：
    根据所述反馈周期向所述第一终端设备发送所述第一测量结果。
  15. 如权利要求12所述的方法，其特征在于，所述第一载波列表为所述第二终端设备上层配置的载波列表、网络能够支持的载波列表、所述第二终端设备能够支持的载波列表、或者前述任意两种或三种的交集。
  16. 如权利要求12-15中任一项所述的方法，其特征在于，所述第一测量结果还包括所述第二载波列表中每个载波的CBR。
  17. 如权利要求12-16中任一项所述的方法，其特征在于，所述确定第一测量结果，包括：
    测量所述第一载波列表中每个载波的CBR；
    对于所述第一载波列表中的任一载波，在所述载波满足第三条件的情况下，将所述载波确定为所述第一载波；或者，
    在所述第一载波列表的所有载波上都没有侧行链路授权的情况下，对于所述第一载波列表中的任一载波，在所述载波满足所述第三条件的情况下，将所述载波确定为所述第一载波；或者，
    在所述第一载波列表中的部分或全部载波上有侧行链路授权的情况下，对于所述第一载波列表中触发了载波选择的任一载波，在所述载波满足第四条件的情况下，将所述载波确定为所述第一载波，对于所述第一载波列表中未触发载波选择的任一载波，在所述载波满足所述第三条件的情况下，将所述载波确定为所述第一载波；
    其中，所述第三条件为所述第二终端设备测量得到的所述载波的CBR低于所述载波对应的第二CBR载波选择阈值；
    所述第四条件为所述第二终端设备测量得到的所述载波的CBR低于所述载波对应的第二CBR载波保留阈值。
  18. 如权利要求17所述的方法，其特征在于，所述第一测量结果还包括所述第二CBR载波选择阈值和/或所述第二CBR载波保留阈值。
  19. 如权利要求17或18所述的方法，其特征在于，在所述确定第一测量结果之前，所述方法还包括：
    接收来自所述第一终端设备的所述数据的优先级或所述数据对应的逻辑信道的优先级；
    根据所述数据的优先级或所述数据对应的逻辑信道的优先级确定所述第二CBR载波选择阈值和/或所述第二CBR载波保留阈值。
  20. 如权利要求17所述的方法，其特征在于，在所述确定第一测量结果之前，所述方法还包括：
    接收来自所述第一终端设备的所述第二CBR载波选择阈值和/或所述第二CBR载波保留阈值。
  21. 一种通信方法，其特征在于，应用于第一终端设备，所述方法包括：
    测量第一载波列表中每个载波的CBR，所述第一载波列表为所述第一终端设备上层配置的载波列表、网络能够支持的载波列表、所述第一终端设备能够支持的载波列表、或者前述任意两种或三种的交集；
    向第二终端设备发送第一测量结果，所述第一测量结果包括所述第一载波列表中每个载波的CBR，或者，所述第一测量结果包括第二载波列表，所述第二载波列表由所述第一载波列表中的至少一个第一载波构成，所述第一终端设备测量到的所述第一载波的CBR低于对应的CBR阈值；
    接收来自所述第二终端设备的候选载波的信息，所述候选载波是所述第二终端设备根据所述第一测量结果和所述第二终端设备对所述第一载波列表或所述第二载波列表中的每个载波的CBR测量得到的，所述候选载波用于通过所述第一终端设备通过与所述第二终端设备之间的侧行链路发送数据。
  22. 如权利要求21所述的方法，其特征在于，在所述向第二终端设备发送第一测量结果之前，所述方法还包括：
    对于所述第一载波列表中的任一载波，在所述载波满足第一条件的情况下，将所述载波确定为所述第一载波；或者，
    在所述第一载波列表的所有载波上都没有侧行链路授权的情况下，对于所述第一载波列表中的任一载波，在所述载波满足所述第一条件的情况下，将所述载波确定为所述第一载波；或者，
    在所述第一载波列表中的部分或全部载波上有侧行链路授权的情况下，对于所述第一载波列表中触发了载波选择的任一载波，在所述载波满足第二条件的情况下，将所述载波确定为所述第一载波，对于所述第一载波列表中未触发载波选择的任一载波，在所述载波满足所述第一条件的情况下，将所述载波确定为所述第一载波；
    其中，所述第一条件为所述第一终端设备测量得到的所述载波的CBR低于所述载波对应的第一CBR载波选择阈值；
    所述第二条件为所述第一终端设备测量得到的所述载波的CBR低于所述载波对应的第一CBR载波保留阈值。
  23. 如权利要求21或22所述的方法，其特征在于，所述第一测量结果还包括所述第二载波列表中每个载波的CBR。
  24. 如权利要求21-23中任一项所述的方法，其特征在于，所述第一测量结果还包括下述中的一项或多项阈值信息：第一CBR载波选择阈值、第一CBR载波保留阈值、第二CBR载波选择阈值、或者第二CBR载波保留阈值，所述阈值信息用于所述第二终端设备确定所述候选载波。
  25. 如权利要求21-23中任一项所述的方法，其特征在于，所述第一测量结果还包括所述数据的优先级或所述数据对应的逻辑信道的优先级，所述数据的优先级或所述数据对应的逻辑信道的优先级用于所述第二终端设备确定第二CBR载波选择阈值和/或第二CBR载波保留阈值，所述第二CBR载波选择阈值和/或所述第二CBR载波保留阈值用于所述第二终端设备确定所述候选载波。
  26. 一种通信方法，其特征在于，应用于第二终端设备，所述方法包括：
    接收来自第一终端设备的第一测量结果，所述第一测量结果包括所述第一终端设备测量得到的第一载波列表中每个载波的CBR，或者，所述第一测量结果包括第二载波列表，所述第一载波列表为所述第一终端设备上层配置的载波列表、网络能够支持的载波列表、所述第一终端设备能够支持的载波列表、或者前述任意两种或三种的交集，所述第二载波列表由所述第一载波列表中的至少一个第一载波构成，所述第一终端设备测量到的所述第一载波的CBR低于对应的CBR阈值；
    测量所述第一载波列表或所述第二载波列表中每个载波的CBR，得到第二测量结果；
    根据所述第一测量结果和所述第二测量结果，确定候选载波，所述候选载波用于通过所述第一终端设备通过与所述第二终端设备之间的侧行链路发送数据；
    向所述第一终端发送所述候选载波的信息。
  27. 如权利要求26所述的方法，其特征在于，所述第一测量结果包括所述第一载波列表中每个载波的CBR；
    其中，所述根据所述第一测量结果和所述第二测量结果，确定候选载波，包括：
    对于所述第一载波列表中的任一载波，在所述载波满足第三条件的情况下，将所述载波确定为所述候选载波；或者，
    在所述第一载波列表的所有载波上都没有侧行链路授权的情况下，对于所述第一载波列表中的任一载波，在所述载波满足所述第三条件的情况下，将所述载波确定为所述候选载波；或者，
    在所述第一载波列表中的部分或全部载波上有侧行链路授权的情况下，对于所述第一载波列表中触发了载波选择的任一载波，在所述载波满足第四条件的情况下，将所述载波确定为所述候选载波，对于所述第一载波列表中未触发载波选择的任一载波，在所述载波满足所述第三条件的情况下，将所述载波确定为所述候选载波；
    其中，所述第三条件为所述第一终端设备测量得到的所述载波的CBR低于所述载波对应的第一CBR载波选择阈值，且所述第二终端设备测量得到的所述载波的CBR低于所述载波对应的第二CBR载波选择阈值，或者，所述第三条件为所述第一终端设备测量得到的所述载波的CBR和所述第二终端设备测量得到的所述载波的CBR的均值低于所述载波对应的第一CBR载波选择阈值或所述载波对应的所述第二CBR载波选择阈值；
    所述第四条件为所述第一终端设备测量得到的所述载波的CBR低于所述载波对应的第一CBR载波保留阈值，且所述第二终端设备测量得到的所述载波的CBR低于所述载波对应的第二CBR载波保留阈值，或者，所述第四条件为所述第一终端设备测量得到的所述载波的CBR和所述第二终端设备测量得到的所述载波的CBR的均值低于所述载波对应的第一CBR载波保留阈值或所述载波对应的所述第二CBR载波保留阈值。
  28. 如权利要求26所述的方法，其特征在于，所述第一测量结果还包括所述第二载波列表中每个载波的CBR。
  29. 如权利要求26或28所述的方法，其特征在于，所述第一测量结果包括所述第二载波列表；
    其中，所述根据所述第一测量结果和所述第二测量结果，确定候选载波，包括：
    对于所述第二载波列表中的任一载波，在所述载波满足第三条件的情况下，将所述载波确定为所述候选载波；或者，
    在所述第二载波列表的所有载波上都没有侧行链路授权的情况下，对于所述第二载波列表中的任一载波，在所述载波满足所述第三条件的情况下，将所述载波确定为所述候选载波；或者，
    在所述第二载波列表的部分或全部载波上有侧行链路授权的情况下，对于所述第二载波列表中触发了载波选择的任一载波，在所述载波满足第四条件的情况下，将所述载波确定为所述候选载波，对于所述第二载波列表中未触发载波选择的任一载波，在所述载波满足所述第三条件的情况下，将所述载波确定为所述候选载波；
    其中，所述第三条件为所述第二终端设备测量得到的所述载波的CBR低于所述载波对应的第二CBR载波选择阈值；
    所述第四条件为所述第二终端设备测量得到的所述载波的CBR低于所述载波对应的第二CBR载波保留阈值。
  30. 如权利要求28所述的方法，其特征在于，所述根据所述第一测量结果和所述第二测量结果，确定候选载波，包括：
    对于所述第二载波列表中的任一载波，在所述载波满足第三条件的情况下，将所述载波确定为所述候选载波；或者，
    在所述第二载波列表的所有载波上都没有侧行链路授权的情况下，对于所述第二载波列表中的任一载波，在所述载波满足所述第三条件的情况下，将所述载波确定为所述候选载波；或者，
    在所述第二载波列表中的部分或全部载波上有侧行链路授权的情况下，对于所述第二载波列表中触发了载波选择的任一载波，在所述载波满足第四条件的情况下，将所述载波确定为所述候选载波，对于所述第二载波列表中未触发载波选择的任一载波，在所述载波满足所述第三条件的情况下，将所述载波确定为所述候选载波；
    其中，所述第三条件为所述第一终端设备测量得到的所述载波的CBR和所述第二终端设备测 量得到的所述载波的CBR的均值低于所述载波对应的第一CBR载波选择阈值或所述载波对应的第二CBR载波选择阈值；
    所述第四条件为所述第一终端设备测量得到的所述载波的CBR和所述第二终端设备测量得到的所述载波的CBR的均值低于所述载波对应的第一CBR载波保留阈值或所述载波对应的所述第二CBR载波保留阈值。
  31. 如权利要求26-30中任一项所述的方法，其特征在于，所述第一测量结果还包括下述中的一项或多项：第一CBR载波选择阈值、第一CBR载波保留阈值、第二CBR载波选择阈值、或者第二CBR载波保留阈值。
  32. 如权利要求27、29或30中任一项所述的方法，其特征在于，所述第一测量结果还包括所述数据的优先级或所述数据对应的逻辑信道的优先级；
    以及，所述方法还包括：
    根据所述数据的优先级或所述数据对应的逻辑信道的优先级，确定所述第二CBR载波选择阈值和/或所述第二CBR载波保留阈值。
  33. 一种通信装置，其特征在于，包括用于执行如权利要求1-11中任一项、12-20中任一项、21-25中任一项、或者26-32中任一项所述方法的各个步骤的单元。
  34. 一种通信装置，其特征在于，包括处理器，所述处理器与存储器耦合，所述存储器用于存储程序或指令，所述程序或指令被所述处理器执行时，使得所述装置执行如权利要求1-11中任一项、12-20中任一项、21-25中任一项、或者26-32中任一项所述方法。
  35. 一种计算机可读存储介质，其上存储有计算机程序或指令，其特征在于，所述计算机程序或指令被执行时，使得所述计算机执行如权利要求1-11中任一项、12-20中任一项、21-25中任一项、或者26-32中任一项所述方法。
  36. 一种计算机程序产品，其特征在于，包括计算机程序指令，所述计算机程序指令使得所述计算机执行如权利要求1-11中任一项、12-20中任一项、21-25中任一项、或者26-32中任一项所述方法。
  37. 一种芯片，其特征在于，包括：处理器，用于从存储器中调用并运行计算机程序，使得安装有所述芯片的通信装置执行如权利要求11-11中任一项、12-20中任一项、21-25中任一项、或者26-32中任一项所述方法。
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