WO2024067266A1 - 一种通信方法、装置及系统 - Google Patents

一种通信方法、装置及系统 Download PDF

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Publication number
WO2024067266A1
WO2024067266A1 PCT/CN2023/119830 CN2023119830W WO2024067266A1 WO 2024067266 A1 WO2024067266 A1 WO 2024067266A1 CN 2023119830 W CN2023119830 W CN 2023119830W WO 2024067266 A1 WO2024067266 A1 WO 2024067266A1
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WIPO (PCT)
Prior art keywords
carrier
control element
information
sidelink
mac
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PCT/CN2023/119830
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English (en)
French (fr)
Inventor
李翔宇
彭文杰
刘俊
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华为技术有限公司
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Publication of WO2024067266A1 publication Critical patent/WO2024067266A1/zh

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Classifications

    • 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, device and system.
  • a user equipment In sidelink (SL) communication, a user equipment (UE) can send a SL media access control (MAC) control element (CE) to another UE.
  • MAC media access control
  • Some current SL MAC CEs include information for a certain carrier, because only single-carrier communication is currently supported in SL scenarios.
  • the current method if the current method is still used, after the receiving UE receives the SL MAC CE, it cannot determine which carrier the information included in the SL MAC CE is for, which will affect the functional implementation of the SL MAC CE, which may cause information indication errors and reduce the quality of SL communication.
  • the embodiments of the present application provide a communication method, device and system for improving SL communication quality.
  • a first communication method is provided, which can be executed by a terminal device, or by other devices including terminal device functions, or by a chip system (or, chip) or other functional module, which can realize the functions of the terminal device, and the chip system or functional module is, for example, arranged in the terminal device.
  • the terminal device is, for example, a first terminal device.
  • the method includes: determining at least one side control element according to carrier information, the carrier information including information of a carrier corresponding to the at least one side control element, one or more side control elements of the at least one side control element being a medium access control control element; determining a first destination address according to the at least one side control element; determining a first logical channel and/or a first side control element according to the first destination address.
  • the first terminal device may execute the SL logical channel prioritization (LCP) process to determine which information to be sent will be allocated resources for executing the new side transmission.
  • the first terminal device may determine at least one side control element according to the carrier information, so that at least one side control element can participate in the SL LCP process, which is equivalent to the embodiment of the present application screening out at least one side control element from the side control elements to be sent through the carrier information, and the screened out at least one side control element can participate in the SL LCP process, for example, to participate in determining the first destination address, while the unscreened side control element may not participate in determining the first destination address, so that the first side control element determined according to the first destination address also belongs to at least one side control element with a high probability, or is also determined according to the carrier information. If the first side control element is also determined according to the carrier information, after the receiving end receives the first side control element, it can determine the carrier corresponding to the information included in the first side
  • the first side control element belongs to the at least one side control element.
  • the first side control element determined by the SL LCP process may be one of the at least one side control element. Since the first side control element is determined based on carrier information, after receiving the first side control element, the receiving end can determine the carrier corresponding to the information included in the first side control element, thereby reducing the probability of indication error and improving the side communication quality.
  • determining at least one sideline control element according to carrier information includes: determining the at least one sideline control element according to the carrier information and a first sideline resource, the first sideline resource being a resource used for sideline transmission.
  • the first terminal device may determine at least one sideline control element according to the carrier information and the first sideline resource, so that the at least one sideline control element is associated with the first sideline resource, so that the receiving end may determine the carrier corresponding to the sideline control element according to the sideline resource of the received sideline control element.
  • determining the at least one side control element based on the carrier information and the first side resource includes: determining that the carrier where the first side resource is located includes the carrier corresponding to the at least one side control element; and/or determining that the carrier corresponding to the at least one side control element is the same carrier as the carrier where the first side resource is located. For example, if the carrier where the first side resource is located includes the carrier corresponding to at least one side control element, or the carrier corresponding to at least one side control element is the same carrier as the carrier where the first side resource is located, then after the receiving end receives a side control element, the side control element can be determined based on the carrier where the side control element is received. The corresponding carrier reduces the probability of indication error and improves the quality of sideline communication.
  • the at least one side control element includes a second side control element, wherein the carrier corresponding to the second side control element is a carrier for transmitting SCI; or, the carrier corresponding to the second side control element is a carrier where the SL transmission scheduled by SCI is located; wherein the SCI is used to instruct the first terminal device to send a side CSI report, and the side CSI report is included in the second side control element.
  • the carrier that transmits SCI is also the carrier that transmits the second side control element. Therefore, for the case of same-carrier scheduling, the carrier corresponding to the second side control element may be a carrier for transmitting SCI, or may be the carrier where the SL transmission scheduled by the SCI is located.
  • the carrier where the SL transmission scheduled by the SCI is located is the carrier where the second side control element is located.
  • the SL transmission scheduled by the SCI is, for example, an SL CSI report.
  • the carrier that transmits SCI is not necessarily the carrier that transmits the second side control element. Therefore, for the case of cross-carrier scheduling, the carrier corresponding to the second side control element may be the carrier where the SL transmission scheduled by the SCI is located.
  • the at least one side control element includes a second side control element, wherein the carrier corresponding to the second side control element is the carrier where the resource pool associated with the auxiliary information is located; or, the carrier corresponding to the second side control element is the carrier where the resource pool where the side resources indicated by the auxiliary information are located is located; or, the carrier corresponding to the second side control element is the carrier used to transmit the auxiliary information; wherein the auxiliary information is included in the second side control element.
  • the auxiliary information can be used to assist the receiving end of the auxiliary information (e.g., the second terminal device) to select SL resources, and the auxiliary information is, for example, inter-UE coordination information (IUC information), or other information.
  • IUC information inter-UE coordination information
  • the resource pool associated with the IUC information is, for example, a sending resource pool where the side resources used to send the IUC request are located, for example, resource pool A.
  • the resource pool where the sidelink resources indicated by the IUC information are located can be the same resource pool as the resource pool A. Therefore, the carrier where the resource pool associated with the IUC information is located and the carrier where the resource pool where the sidelink resources indicated by the IUC information are located can be the same carrier; and the sidelink resources used to transmit the IUC information can also be resources within the resource pool A.
  • the carrier used to transmit the IUC information and the carrier where the sending resource pool are located can also be the same carrier.
  • the second terminal device does not send an IUC request to the first terminal device, but the first terminal device sends the IUC information to the second terminal device based on other conditions.
  • the resource pool associated with the IUC information is, for example, pre-configured, such as resource pool B.
  • the resource pool where the sidelink resources indicated by the IUC information are located and the resource pool B can be the same resource pool; and the sidelink resources used to transmit the IUC information can also be resources within the resource pool B. Therefore, the carrier used to transmit the IUC information and the carrier where the resource pool B is located can also be the same carrier.
  • the at least one side control element includes a second side control element, wherein the carrier corresponding to the second side control element is the carrier where the resource pool associated with the auxiliary request is located; or, the carrier corresponding to the second side control element is the carrier where the resource pool where the side resources indicated by the auxiliary request are located; or, the carrier corresponding to the second side control element is the carrier used to transmit the auxiliary request; wherein the auxiliary request is included in the second side control element, and the auxiliary request is used to request the receiving end of the second side control element to send auxiliary information.
  • the auxiliary request is, for example, an IUC request, and the IUC request can be used to request the receiving end of the second side control element to send IUC information.
  • the first terminal device can send an IUC request to other terminal devices (such as the second terminal device) to request to obtain IUC information.
  • the resource pool associated with the IUC request is, for example, a sending resource pool where the side resources used to send the IUC request are located, for example, resource pool C.
  • the IUC request may also indicate the corresponding sidelink resources.
  • the sidelink resources indicated by the IUC request are, for example, also included in the resource pool C. Therefore, the carrier where the resource pool associated with the IUC request is located and the carrier where the resource pool where the sidelink resources indicated by the IUC request are located may be the same carrier.
  • the sidelink resources used to transmit the IUC request may also be the sidelink resources in the resource pool C. Therefore, the carrier where the resource pool associated with the IUC request is located and the carrier used to transmit the IUC request may also be the same carrier.
  • determining the first destination address according to the at least one side control element includes: determining the first destination address according to the priority of the at least one side control element.
  • determining the first destination address according to the priority of the at least one side control element includes: determining the first destination address according to the priority of the at least one side control element and the priority of the logical channel to be sent.
  • the first terminal device may determine that the destination address associated with the side control element and/or the logical channel with the highest priority among at least one side control element and the logical channel to be sent is the first destination address.
  • the method further includes: allocating a first sideline resource to a first logical channel and/or a first sideline control element, the first sideline resource being a resource used for sideline transmission; and sending the first logical channel and/or the first sideline control element.
  • the first sideline resource is a resource used for sideline transmission this time, so the first terminal device may allocate the first sideline resource to the first logical channel and/or the first sideline control element to transmit the first logical channel and/or the first sideline control element.
  • the method further includes: performing carrier reselection or carrier selection to re-determine the carrier. It is possible that the first terminal device cannot determine at least one side control element based on the carrier information. For example, the carrier where the first side resource is located does not include the carrier corresponding to any side control element to be sent, and the carrier corresponding to the side control element to be sent is not the same carrier as the carrier where the first side resource is located, then the first terminal device cannot determine at least one side control element. In this case, optionally, the first terminal device can perform carrier reselection or carrier selection to redetermine the carrier. After redetermining the carrier, the first terminal device can obtain the side resources on the carrier for side transmission. Since the carrier is redetermined, it is possible for the first terminal device to determine the side control element based on the carrier information, so that the scheme of the embodiment of the present application can be executed.
  • the re-determined carrier includes the carrier corresponding to the at least one side control element.
  • the carrier re-determined by the first terminal device may include the carrier corresponding to the at least one side control element. In this way, the first terminal device can determine the side control element according to the carrier information and the side resources on the re-determined carrier, so that the method of the embodiment of the present application can be executed.
  • the carrier reselection or selection process is completed within a first duration, the first duration is a duration corresponding to a first timer, and the first timer is used to indicate the validity period of a side control element.
  • the carrier reselection or carrier selection process can be completed within the validity period of a side control element to reduce information transmission delay.
  • the carrier reselection or selection process is completed in a second duration
  • the second duration is the duration corresponding to the second timer
  • the duration corresponding to the second timer is greater than the duration corresponding to the first timer
  • the first timer is used to indicate the validity period of a side control element.
  • the first terminal device can maintain the second timer (the second terminal device can also maintain the second timer) so that the first terminal device has as much time as possible to perform carrier reselection or carrier selection, and can also reduce the probability of failure of the side control element (for example, the side control element is valid during the operation of the second timer).
  • the method further includes: determining that the format of the first sideline control element is a first format according to the carrier information, and in the first format, the first sideline control element does not include information about resources corresponding to the first sideline control element. Since the receiving end can determine the carrier corresponding to the first sideline control element according to the carrier carrying the first sideline control element without adding additional indications in the first sideline control element, the first sideline control element can adopt the first format, which is more compatible with existing technologies and simplifies the implementation of the first sideline control element.
  • a second communication method which can be executed by a terminal device, or by other devices including terminal device functions, or by a chip system (or, chip) or other functional module, which can realize the functions of the terminal device, and the chip system or functional module is, for example, set in the terminal device.
  • the terminal device is, for example, a first terminal device.
  • the method includes: determining a first destination address according to a logical channel and/or a side control element to be sent; determining a first side control element from the side control elements associated with the first destination address according to carrier information, wherein the carrier information includes carrier information corresponding to the first side control element, and the first side control element is a medium access control control element.
  • the first terminal device can determine the first side control element according to the carrier information in the second step of the SL LCP, for example, the first terminal device sends the first side control element to the second terminal device, and the second terminal device can determine the carrier corresponding to the first side control element after receiving the first side control element, or determine the carrier corresponding to the information included in the first side control element. Therefore, even in a multi-carrier SL scenario, the receiving end can determine the carrier corresponding to the received side control element, reducing the probability of the side control element indicating an error in the carrier and improving the side communication quality.
  • determining the first sidewalk control element from the sidewalk control elements associated with the first destination address according to the carrier information includes: determining the first sidewalk control element from the sidewalk control elements associated with the first destination address according to the carrier information and the first sidewalk resource.
  • the first sidelink control element is determined from the sidelink control elements associated with the first destination address, including: determining that the carrier where the first sidelink resource is located includes the carrier corresponding to the first sidelink control element; and/or determining that the carrier corresponding to the first sidelink control element is the same carrier as the carrier where the first sidelink resource is located.
  • the carrier corresponding to the first sidelink control element is a carrier used to transmit SCI; or, the carrier corresponding to the first sidelink control element is a carrier where the SL transmission scheduled by SCI is located; wherein the SCI is used to instruct the first terminal device to send a sidelink CSI report, and the sidelink CSI report is included in the first sidelink control element.
  • the carrier corresponding to the first sideline control element is the carrier where the resource pool associated with the auxiliary information is located; or, the carrier corresponding to the first sideline control element is the carrier where the resource pool where the sideline resources indicated by the auxiliary information are located is located; or, the carrier corresponding to the first sideline control element is the carrier used to transmit the auxiliary information; wherein the auxiliary information is included in the first sideline control element.
  • the auxiliary information can be used to assist the receiving end of the auxiliary information (e.g., the second terminal device) to select SL resources, and the auxiliary information is, for example, IUC information, or can also be other information.
  • the carrier corresponding to the first sideline control element is the carrier where the resource pool associated with the auxiliary request is located; or, the carrier corresponding to the first sideline control element is the carrier where the resource pool where the sideline resources indicated by the auxiliary request are located is located; or, the carrier corresponding to the first sideline control element is the carrier used to transmit the auxiliary request; wherein the auxiliary request is included in the first sideline control element, and the auxiliary request is used to request the receiving end of the first sideline control element to send auxiliary information.
  • the auxiliary request is, for example, an IUC request, and the IUC request can be used to request the receiving end of the second sideline control element to send IUC information.
  • determining the first destination address according to the logical channel and/or the sideline control element to be sent includes: determining the first destination address according to the priority of the logical channel and/or the sideline control element to be sent.
  • the method further includes: allocating a first sidewalk resource to a first sidewalk control element, the first sidewalk resource being a resource used for sidewalk transmission; and sending the first sidewalk control element.
  • the method further includes: performing carrier reselection or carrier selection to re-determine the carrier.
  • the re-determined carrier includes a carrier corresponding to the first sideline control element.
  • the carrier reselection or selection process is completed within a first duration, where the first duration is a duration corresponding to a first timer, and the first timer is used to indicate a validity period of the first sidelink control element.
  • the carrier reselection or selection process is completed in a second time duration, the second time duration is the time duration corresponding to a second timer, the time duration corresponding to the second timer is greater than the time duration corresponding to the first timer, and the first timer is used to indicate the validity period of the first side control element.
  • the method further includes: determining, based on the carrier information, that the format of the first sidelink control element is a first format, wherein in the first format, the first sidelink control element does not include information about resources corresponding to the first sidelink control element.
  • a third communication method is provided, which can be executed by a terminal device, or by other devices including terminal device functions, or by a chip system (or, chip) or other functional modules, which can realize the functions of the terminal device, and the chip system or functional module is, for example, arranged in the terminal device.
  • the terminal device is, for example, a first terminal device.
  • the method includes: determining a side control element, the side control element including first information, and the side control element also including information about resources corresponding to the side control element.
  • the second terminal device can determine the resources corresponding to the side control element based on the information about the resources corresponding to the side control element included in the side control element, thereby reducing the probability of erroneous indications and improving the quality of side transmission. Moreover, the constraint relationship between the transmission of the side control element and the carrier is also released. For example, the side control element corresponding to carrier 1 can be transmitted on carrier 1 or on other carriers, making the transmission of the side control element more flexible.
  • the method further includes: sending the sideline control element through the first sideline resource. For example, if the first sideline resource is sufficient to send the sideline control element (or, sufficient to send the sideline control element and a subheader of the sideline control element), the first terminal device may send the sideline control element through the first sideline resource, otherwise, the first terminal device may not be able to send the sideline control element.
  • the resource corresponding to the sidewalk control element is a carrier or a resource pool.
  • the first information is a sidelink CSI report, auxiliary information or an auxiliary request.
  • the auxiliary request is, for example, an IUC request
  • the auxiliary information is, for example, IUC information.
  • the carrier corresponding to the sideline control element is a carrier used to transmit the SCI; or, the carrier corresponding to the sideline control element is a carrier where the sideline resources scheduled by the SCI are located.
  • the SCI is used to instruct the first terminal device to send a sideline CSI report, the first information is the sideline CSI report, and the resource corresponding to the sideline control element is a carrier.
  • the carrier corresponding to the side control element is the carrier where the resource pool associated with the auxiliary information is located; or, the carrier corresponding to the side control element is the carrier where the resource pool where the side resources indicated by the auxiliary information are located is located; or, the carrier corresponding to the side control element is the carrier used to transmit the auxiliary information; wherein the first information is the auxiliary information, and the resource corresponding to the side control element is the carrier.
  • the auxiliary information can be used to assist the receiving end of the auxiliary information (e.g., the second terminal device) to select SL resources, and the auxiliary information is, for example, IUC information, or can also be other information.
  • the resource pool corresponding to the side control element is a resource pool associated with the auxiliary information; or, the resource pool corresponding to the side control element is a resource pool where the side resources indicated by the auxiliary information are located; or, the resource pool corresponding to the side control element is a resource pool used to transmit the auxiliary information; wherein the first information is the auxiliary information, and the resource corresponding to the side control element is a resource pool.
  • the auxiliary information please refer to the above.
  • the carrier corresponding to the sidelink control element is the carrier where the resource pool associated with the auxiliary request is located; or, The carrier corresponding to the sideline control element is the carrier of the resource pool where the sideline resource indicated by the auxiliary request is located; or, the carrier corresponding to the sideline control element is the carrier used to transmit the auxiliary request; wherein the first information is the auxiliary request, and the resource corresponding to the sideline control element is the carrier.
  • the auxiliary request please refer to the above.
  • the resource pool corresponding to the side control element is a resource pool associated with the auxiliary request; or, the resource pool corresponding to the side control element is a resource pool where the side resources indicated by the auxiliary request are located; or, the resource pool corresponding to the side control element is a resource pool used to transmit the auxiliary request; wherein the first information is the auxiliary request, and the resource corresponding to the side control element is a resource pool.
  • the auxiliary request please refer to the above.
  • the side control element also includes information about the resource corresponding to the side control element, including: the side control element includes an index of the resource corresponding to the side control element; or, the side control element includes a bit map, and the bits included in the bit map correspond to the resource corresponding to the side control element.
  • the side control element may include the index of the corresponding resource, so that the indication is clearer.
  • the side control element may also indicate the resource corresponding to the side control element through a bit map, thereby reducing the amount of information of the side control element and thus reducing the transmission overhead.
  • the method further includes: determining that the format of the side control element is a second format according to the carrier information, and in the second format, the side control element includes information about the resource corresponding to the side control element.
  • the resource e.g., carrier
  • the side control element can adopt the second format, and the resource corresponding to the side control element can be included in the side control element, so that the receiving end can clearly identify the resource corresponding to the side control element and reduce the probability of erroneous indication.
  • the carrier information includes information of the carrier corresponding to the sideline control element and/or includes the number of carriers used for communication between the transmitter and receiver of the sideline control element.
  • the format of the side control element is determined according to the carrier information, including method a, method b or method c.
  • Method a is that if the carrier where the first side resource is located includes the carrier corresponding to the side control element, the format of the side control element is determined to be the first format, otherwise the format of the side control element is determined to be the second format;
  • method b is that if the carrier corresponding to the side control element is the same as the carrier where the first side resource is located, the format of the side control element is determined to be the first format, otherwise the format of the side control element is determined to be the second format;
  • method c is that if the number of carriers used for communication between the transmitter and the receiver of the side control element is 1, the format of the side control element is determined to be the first format, otherwise the format of the side control element is determined to be the second format.
  • the format of the side control element can be directly determined to be the second format, or the format of the side control element can be determined by any of methods a or b.
  • a fourth communication method is provided, which can be executed by a terminal device, or by other devices including terminal device functions, or by a chip system (or, chip) or other functional module, the chip system or functional module can realize the function of the terminal device, the chip system or functional module is, for example, set in the terminal device.
  • the terminal device is, for example, a first terminal device.
  • the method includes: determining that the format of the side control element is a first format or a second format according to the carrier information; sending the side control element through a first side resource; wherein, when the format of the side control element is the second format, the side control element includes information of the resource corresponding to the side control element.
  • the first terminal device can determine the format of the side control element according to a corresponding method, so that the side control element can adopt a more suitable format.
  • the second terminal device can also determine the format of the side control element in the same way as the first terminal device, so that the first terminal device and the second terminal device can have the same understanding of the format of the side control element, reducing the probability of indicating errors.
  • the side control element when the format of the side control element is the first format, the side control element does not include information about the resource corresponding to the side control element. If the format of the side control element is the first format, the implementation of the side control element can be simplified and can also be better compatible with existing technologies.
  • the carrier information includes information of the carrier corresponding to the sideline control element and/or includes the number of carriers used for communication between the transmitter and receiver of the sideline control element.
  • determining the format of the side control element according to the carrier information includes: if the carrier where the first side resource is located includes the carrier corresponding to the side control element, determining that the format of the side control element is the first format, otherwise determining that the format of the side control element is the second format; or, if the carrier corresponding to the side control element is the same carrier as the carrier where the first side resource is located, determining that the format of the side control element is the first format, otherwise determining that the format of the side control element is the second format; or, if the side resource If the number of carriers used for communication between the transmitting end and the receiving end of the control element is 1, the format of the sideline control element is determined to be the first format; otherwise, the format of the sideline control element is determined to be the second format.
  • the carrier corresponding to the sidelink control element is a carrier used to transmit SCI; or, the carrier corresponding to the sidelink control element is a carrier where the sidelink resources scheduled by SCI are located; wherein the SCI is used to request the transmitter of the sidelink control element to send a sidelink CSI report, and the sidelink CSI report is included in the sidelink control element.
  • the carrier corresponding to the sideline control element is the carrier where the resource pool associated with the auxiliary information is located; or, the carrier corresponding to the sideline control element is the carrier where the resource pool where the sideline resources indicated by the auxiliary information are located is located; or, the carrier corresponding to the sideline control element is the carrier used to transmit the auxiliary information; wherein the auxiliary information is included in the sideline control element.
  • the auxiliary information can be used to assist the receiving end of the auxiliary information (e.g., the second terminal device) to select SL resources, for example, the auxiliary information is IUC information, or it can also be other information.
  • the carrier corresponding to the side control element is the carrier where the resource pool associated with the auxiliary request is located; or, the carrier corresponding to the side control element is the carrier where the resource pool where the side resources indicated by the auxiliary request are located is located; or, the carrier corresponding to the side control element is the carrier used to transmit the auxiliary request; wherein the auxiliary request is included in the side control element, and the auxiliary request is used to request the receiving end of the side control element to send auxiliary information, and the auxiliary information can be used to assist the first terminal device in selecting SL resources.
  • the auxiliary request is, for example, an IUC request
  • the auxiliary information is, for example, IUC information.
  • the resource corresponding to the sidewalk control element is a carrier or a resource pool.
  • a communication device may be the first terminal device described in any one of the first to fourth aspects.
  • the communication device has the function of the first terminal device.
  • the communication device is, for example, the first terminal device, or a larger device including the first terminal device, or a functional module in the first terminal device, such as a baseband device or a chip system.
  • the communication device includes a baseband device and a radio frequency device.
  • the communication device includes a processing unit (sometimes also referred to as a processing module) and a transceiver unit (sometimes also referred to as a transceiver module).
  • the transceiver unit can implement a sending function and a receiving function.
  • the transceiver unit When the transceiver unit implements the sending function, it can be called a sending unit (sometimes also referred to as a sending module), and when the transceiver unit implements the receiving function, it can be called a receiving unit (sometimes also referred to as a receiving module).
  • the sending unit and the receiving unit can be the same functional module, which is called a transceiver unit, and the functional module can implement the sending function and the receiving function; or, the sending unit and the receiving unit can be different functional modules, and the transceiver unit is a general term for these functional modules.
  • the processing unit is used to determine at least one side control element based on carrier information, the carrier information includes information of a carrier corresponding to the at least one side control element, and each of the at least one side control element is a medium access control element; the processing unit is also used to determine a first destination address based on the at least one side control element; the processing unit is also used to determine a first logical channel and/or a first side control element based on the first destination address.
  • the processing unit is used to determine the first destination address based on the logical channel and/or side control element to be sent; the processing unit is also used to determine the first side control element from the side control elements associated with the first destination address based on carrier information, wherein the carrier information includes carrier information corresponding to the first side control element, and the first side control element is a medium access control element.
  • the processing unit is used to determine a side control element, the side control element includes first information, and the side control element also includes information of resources corresponding to the side control element; the transceiver unit (or, the sending unit) is used to send the side control element via the first side resource.
  • the processing unit is used to determine whether the format of the side control element is a first format or a second format based on the carrier information; the transceiver unit (or, the sending unit) is used to send the side control element through the first side resource; wherein, when the format of the side control element is the second format, the side control element includes information on the resource corresponding to the side control element.
  • the communication device also includes a storage unit (sometimes also referred to as a storage module), and the processing unit is used to couple with the storage unit and execute the program or instructions in the storage unit, so that the communication device can perform the function of the first terminal device described in any one of the first to fourth aspects above.
  • a storage unit sometimes also referred to as a storage module
  • a communication device which may be a first terminal device, or a chip or chip system arranged in the first terminal device.
  • the communication device includes a communication interface and a processor, and optionally, also includes a memory.
  • the memory is used to store a computer program, and the processor is coupled to the memory and the communication interface.
  • the processor reads the computer program or instruction, the communication device executes the method executed by the first terminal device in the above aspects.
  • a communication system comprising a first terminal device, wherein the first terminal device is used to execute the method performed by the first terminal device as described in any one of the first to fourth aspects.
  • a computer-readable storage medium is provided, wherein the computer-readable storage medium is used to store a computer program or instruction, and when the computer-readable storage medium is executed, the method executed by the first terminal device in the above aspects is implemented.
  • a computer program product comprising instructions, which, when executed on a computer, enables the methods described in the above aspects to be implemented.
  • a chip system comprising a processor and an interface, wherein the processor is used to call and execute instructions from the interface so that the chip system implements the above-mentioned methods.
  • Figure 1 is a flowchart of the reporting process of the SL CSI report
  • Figure 2 is a flow chart of the IUC mechanism
  • FIG3 is a schematic diagram of a network architecture used in an embodiment of the present application.
  • FIG4 is a flow chart of a first communication method provided in an embodiment of the present application.
  • FIG5 is a flow chart of a second communication method provided in an embodiment of the present application.
  • FIG6 is a flow chart of a third communication method provided in an embodiment of the present application.
  • FIG7A and FIG7B are schematic diagrams of two formats of SL MAC CE in an embodiment of the present application.
  • FIG8 is a flow chart of a fourth communication method provided in an embodiment of the present application.
  • FIG9 is a schematic diagram of a device provided in an embodiment of the present application.
  • FIG. 10 is a schematic diagram of another device provided in an embodiment of the present application.
  • the number of nouns means “singular noun or plural noun", that is, “one or more”.
  • At least one means one or more
  • plural means two or more.
  • “And/or” describes the association relationship of associated objects, indicating that three relationships may exist.
  • a and/or B can mean: A exists alone, A and B exist at the same time, and B exists alone, where A and B can be singular or plural.
  • the character "/” generally indicates that the previous and next associated objects are in an “or” relationship.
  • A/B means: A or B.
  • “At least one of the following" or similar expressions refers to any combination of these items, including any combination of single or plural items.
  • At least one of a, b, or c means: a, b, c, a and b, a and c, b and c, or a and b and c, where a, b, c can be single or multiple.
  • the terminal device is a device with wireless transceiver function, which can be a fixed device, a mobile device, a handheld device (such as a mobile phone), a wearable device, a vehicle-mounted device, or a wireless device built into the above device (for example, a communication module, a modem, or a chip system, etc.).
  • the terminal device is used to connect people, objects, machines, etc., and can be widely used in various scenarios, such as but not limited to the following scenarios: cellular communication, device-to-device communication (device-to-device, D2D), V2X, machine-to-machine/machine-type communication (machine-to-machine/machine-type communications, M2M/MTC), Internet of Things (Internet of Things, IoT), virtual reality (virtual reality, VR), augmented reality (augmented reality, AR), industrial control (industrial control), self-driving, remote medical, smart grid (smart grid), smart furniture, smart office, smart wear, smart transportation, smart city (smart city), drones, robots and other scenarios of terminal devices.
  • the terminal device may sometimes be referred to as UE, terminal, access station, UE station, remote station, wireless communication device, or user equipment, etc.
  • the terminal device is described by taking UE as an example in the embodiments of the present application.
  • the network devices in the embodiments of the present application include, for example, access network devices and/or core network devices.
  • the access network devices are devices with wireless transceiver functions, used to communicate with the terminal devices.
  • the access network devices include but are not limited to base stations (base transceiver stations). (base transceiver station, BTS), Node B, eNodeB/eNB, or gNodeB/gNB), transmission reception point (TRP), base station of subsequent evolution of the third generation partnership project (3GPP), access node in wireless fidelity (Wi-Fi) system, wireless relay node, wireless backhaul node, etc.
  • the base station can be: macro base station, micro base station, micro-micro base station, small station, relay station, etc.
  • the base station can include one or more co-site or non-co-site transmission and reception points.
  • the access network device can also be a wireless controller, a centralized unit (CU), and/or a distributed unit (DU) in a cloud radio access network (CRAN) scenario.
  • the access network device can also be a server, etc.
  • the network device in the vehicle to everything (V2X) technology can be a road side unit (RSU).
  • the base station can communicate with the terminal device, and can also communicate with the terminal device through a relay station.
  • the terminal device can communicate with multiple base stations in different access technologies.
  • the core network equipment is used to implement functions such as mobility management, data processing, session management, policy and billing.
  • functions such as mobility management, data processing, session management, policy and billing.
  • the names of the devices that implement core network functions in systems with different access technologies may be different, and the embodiments of the present application do not limit this.
  • the core network equipment includes: access and mobility management function (AMF), session management function (SMF), policy control function (PCF) or user plane function (UPF), etc.
  • AMF access and mobility management function
  • SMF session management function
  • PCF policy control function
  • UPF user plane function
  • the communication device for realizing the function of the network device may be a network device, or may be a device capable of supporting the network device to realize the function, such as a chip system, which may be installed in the network device.
  • the technical solution provided in the embodiment of the present application is described by taking the device for realizing the function of the network device as an example that the network device is used as the device.
  • UEs may communicate with each other through a single carrier or through more than one carrier.
  • SL carrier aggregation (CA) technology may be introduced so that UEs may communicate with each other through more than one carrier on the SL.
  • a UE may use more than one carrier to send broadcast or multicast messages, or a UE may use more than one carrier to perform unicast communication with another UE.
  • Different data may be sent on different carriers, thereby increasing the data rate on the SL; alternatively, the same data may be sent on different carriers, for example, a duplication mechanism may be used, and repeated data may be transmitted on different carriers to improve the reliability of data transmission.
  • the carriers described in the embodiments of the present application may be understood as SL carriers.
  • the technical solution provided in the embodiments of the present application can be applied to the 4th generation (4G) system, such as the long term evolution (LTE) system, or can be applied to the 5G system, such as the NR system, or can also be applied to the next generation mobile communication system or other similar communication systems, such as the 6th generation (6G) system, etc., without specific limitation.
  • the technical solution provided in the embodiments of the present application can be applied to the device-to-device (D2D) scenario, such as the NR-D2D scenario, etc., or can be applied to the vehicle-to-everything (V2X) scenario, such as the NR-V2X scenario, etc.
  • D2D device-to-device
  • V2X vehicle-to-everything
  • it can be applied to the Internet of Vehicles, such as V2X, etc., or can be used in the fields of intelligent driving, assisted driving, or intelligent networked vehicles.
  • SL MAC CE can be used to transmit a variety of different information, as shown below.
  • SL MAC CE includes SL channel state information (CSI) reporting.
  • CSI channel state information
  • the transmission UE sends a PC5-radio resource control (RRC) message to the reception UE (RX UE).
  • RRC PC5-radio resource control
  • the RX UE receives the PC5-RRC message from the TX UE.
  • the TX UE sends sidelink control information (SCI) to the RX UE.
  • the RX UE receives the SCI from the TX UE.
  • the TX UE may set the value of the CSI request field included in the SCI to "1", so that the SCI is used to trigger the SL CSI report.
  • the TX UE may also send a reference signal to the RX UE according to the RX pattern configured in S101, for example, the reference signal is sent via a physical sidelink shared channel (PSSCH).
  • PSSCH physical sidelink shared channel
  • the RX UE may measure the reference signal according to the RS pattern, thereby obtaining an SL CSI report.
  • the RX UE may trigger the SL CSI report. For example, the RX UE maintains a SL CSI report status bit, and after receiving the SCI, the status bit may be set to a triggered state. After the SL CSI report is triggered, the RX UE may send the SL CSI report to the TX UE.
  • the RX UE sends a SL CSI reporting MAC CE to the TX UE.
  • the TX UE receives the SL CSI reporting MAC CE from the RX UE.
  • the SL CSI reporting MAC CE may include a SL CSI report measured by the RX UE.
  • the SL CSI report includes information such as a rank indicator (RI) and a channel quality indicator (CQI).
  • the MAC layer of both the TX UE and the RX UE can maintain a sidelink CSI reporting timer (sl-CSI-ReportTimer) for each unicast connection (a pair of source L2 ID and destination L2 ID).
  • the sl-CSI-ReportTimer is used for the UE that sends the SL CSI report (e.g., the RX UE in FIG1 ) to meet the latency requirement set by the UE that triggers the SL CSI report (e.g., the TX UE in FIG1 ).
  • the TX UE can configure the sl-CSI-ReportTimer to the RX UE via a PC5RRC message, and the PC5-RRC message and the PC5-RRC message in S101 can be the same message, or they can be two messages.
  • the RX UE needs to send the SL CSI reporting MAC CE to the TX UE within the running time of the sl-CSI-ReportTimer, otherwise the SL CSI report included in the SL CSI reporting MAC CE will become invalid.
  • the sl-CSI-ReportTimer corresponding to the triggered SL CSI report is not running, the sl-CSI-ReportTimer can be started. If the sl-CSI-ReportTimer corresponding to the triggered SL CSI report times out, the SL CSI report can be cancelled, for example, the status bit corresponding to the SL CSI report is set to a canceled trigger state.
  • the RX UE can instruct the multiplexing and assembly process to generate a SL CSI reporting MAC CE, and the RX UE can stop running the sl-CSI-ReportTimer, and the triggered SL CSI report can be cancelled, for example, the status bit corresponding to the SL CSI report is set to a canceled trigger state.
  • (2)SL MAC CE includes IUC information or IUC request.
  • UE1 may send IUC information to UE2, for example, UE1 sends the IUC information to UE2 via IUC information MAC CE.
  • UE2 may receive the IUC information MAC CE to obtain the IUC information.
  • the IUC information can be used by UE2 to select SL resources.
  • the IUC information may include a preferred (or, recommended) resource set (preferred resource set) or a non-preferred (or, non-recommended) resource set (non-preferred resource set), the preferred resource set may include information about the SL resources recommended for UE2 to select, and the non-preferred resource set may include information about the SL resources not recommended for UE2 to select.
  • UE2 may send an IUC request to UE1, the IUC request may be included in, for example, an IUC request MAC CE, and the IUC request may be used to request IUC information, for example, request UE1 to send IUC information to UE2.
  • UE1 may send IUC information to UE2, for example, sending an IUC information MAC CE including the IUC information to UE2.
  • UE1 can use the sending resource pool 1 corresponding to the IUC request for transmitting UE2 to send the IUC information.
  • UE2 uses the SL resources included in the sending resource pool 2 to send the IUC request to UE1 (for example, sending IUC request MAC CE), then UE1 can use the SL resources included in the sending resource pool 1 to send IUC information to UE2 (for example, sending IUC information MAC CE).
  • the SL resources indicated by the IUC information can be the SL resources in the sending resource pool 1.
  • Sending resource pool 1 is a resource pool configured for UE1 to use
  • sending resource pool 2 is a resource pool configured for UE2 to use.
  • the two resource pools correspond to each other.
  • the two resource pools can be the same resource pool or different resource pools.
  • UE1 can use the SL resources included in the resource pool associated with the IUC information (for example, the resource pool where the SL resources indicated by the IUC information are located) to send the IUC information to UE2.
  • the SL resources indicated by the IUC information may also be SL resources in the resource pool.
  • a carrier may include one or more resource pools.
  • one UE can send a SL MAC CE to another UE.
  • Some of the current SL MAC CEs contain information for a certain carrier, because only single-carrier communication is currently supported in the SL scenario.
  • the receiving UE receives the SL MAC CE, it cannot determine which carrier the information included in the SL MAC CE is for, which will affect the functional implementation of the SL MAC CE, which may cause information indication errors and reduce the quality of SL communication.
  • the first UE can determine at least one side control element according to the carrier information, so that the at least one side control element can participate in the SL LCP process, which is equivalent to that the embodiment of the present application screens out some side control elements from the side control elements to be sent through the carrier information, and the at least one screened side control element can participate in the SL LCP process, for example, participate in determining the first destination address, and the unscreened side control element may not participate in determining the first destination address, so that the first side control element determined according to the first destination address also belongs to at least one side control element with a high probability, or is also determined according to the carrier information.
  • the receiving end receives the first side control element. After the control element is determined, the carrier corresponding to the information included in the first sideline control element can be determined, thereby reducing the probability of indication error and improving the sideline communication quality.
  • the side control element is, for example, SL MAC CE, or may be other side transmission information.
  • the side control element is SL MAC CE as an example for introduction.
  • SL can be referred to as "sidelink", for example, SL CSI report can be referred to as sidelink CSI report, SL MAC CE can be referred to as sidelink MAC CE, SL LCP can be referred to as sidelink LCP, etc., and this is used as an example in the following text.
  • SL can also be referred to as "sidelink”, for example, SL CSI report can also be referred to as sidelink CSI report, SL MAC CE can also be referred to as sidelink MAC CE, SL LCP can also be referred to as sidelink LCP, etc.
  • UE1 and UE2 perform SL communication.
  • UE1 can send data to UE2, such as SL MAC CE.
  • UE1 can be in the in coverage (IC) state or the out of coverage (OOC) state.
  • OOC out of coverage
  • UE1 can request SL resources from the access network device (the access network device shown in Figure 3) to send SL information, such as sending SL MAC CE or SL data, etc.
  • This mode is called mode 1 resource allocation mode.
  • the access network device can schedule SL resources for UE1 through downlink control information (DCI), or configure SL configuration authorization (configured grant) for UE1 through RRC messages.
  • DCI downlink control information
  • configured grant configured grant
  • UE1 may also work in mode 2.
  • UE1 may be in RRC connected state, RRC inactive state, RRC idle state or OOC state.
  • UE1 may receive information about the SL resource pool from the access network device, or determine the SL resource pool according to pre-configured information, so that SL resources may be selected from the SL resource pool to send SL information, such as SL MAC CE or SL data.
  • UE1 may select SL resources from the SL resource pool randomly, or based on the results of sensing or partial sensing.
  • SL MAC CE can indicate information to be sent, for example, one indication method is that SL MAC CE includes information to be sent; for example, another indication method is that SL MAC CE includes indication information, through which the information to be sent can be indicated, and the receiving end can determine the information to be sent according to the indication information.
  • the information to be sent includes, for example, one or more of SL CSI report, IUC information or IUC request, and can also include other side information.
  • SL MAC CE including information to be sent is used as an example in the following text.
  • the SL MAC CE described in the following text includes corresponding information, which can be replaced by SL MAC CE indicating the information.
  • LCH can also indicate information to be sent, and the indication method is similar to that of SL MAC CE.
  • LCH including information to be sent is used as an example in the following text. It can be understood that the LCH described in the following text includes corresponding information, which can be replaced by LCH indicating the information.
  • the steps indicated by dotted lines in the accompanying drawings corresponding to the various embodiments of the present application are all optional steps.
  • the methods provided in the various embodiments of the present application can be applied to the network architecture shown in Figure 3.
  • the first UE involved in the methods provided in the various embodiments of the present application can be UE1 in Figure 3
  • the second UE involved in the methods provided in the various embodiments of the present application can be UE2 in Figure 3
  • the access network device involved in the methods provided in the various embodiments of the present application can be the access network device in Figure 3.
  • the first UE determines at least one side control element according to carrier information.
  • One or more of the at least one side control element is, for example, a SL MAC CE.
  • each of the at least one side control element is a SL MAC CE.
  • the at least one side control element is described as at least one SL MAC CE in the following text.
  • the first UE Before executing a new SL transmission, the first UE may execute the SL LCP process. For example, if the first UE has an LCH and/or SL MAC CE to be sent, and the first UE has also determined the SL resources (for example, called the first SL resources) for this transmission, then through the SL LCP process, the first UE may determine which LCHs and/or SL MAC CEs to be sent to which the first SL resources are allocated. If the first UE operates in mode 1, the first SL resource may be the SL resource requested by the first UE from the access network device; if the first UE operates in mode 2, the first SL resource may be the SL resource selected by the first UE from the SL resource pool.
  • the first SL resource may be the SL resource selected by the first UE from the SL resource pool.
  • LCHs to be sent There may be one or more LCHs to be sent, and the LCHs to be sent may also be understood as the LCHs associated with the destination address of the information to be sent, and the LCHs include the information to be sent.
  • LCHs to be sent There may be one or more SL MAC CEs to be sent, and the SL MAC CEs to be sent may also be understood as the SL MAC CEs associated with the destination address of the information to be sent, and the SL MAC CEs include the information to be sent.
  • the information to be sent included in the LCH may be the same as or different from the information to be sent included in the SL MAC CE.
  • the at least one SL MAC CE is determined from the SL MAC CE to be sent according to the carrier information, for example.
  • At least one SL MAC CE may include part or all of the SL MAC CEs in the SL MAC CE to be sent.
  • the carrier information may include information about the carrier corresponding to the at least one SL MAC CE, or the carrier information may include information about the carrier corresponding to the SL MAC CE to be sent.
  • Determine at least one SL MAC CE based on the carrier information for example, one way is to determine at least one SL MAC CE based on the carrier information and the first SL resource.
  • the carrier corresponding to the at least one SL MAC CE determined in this way may have a corresponding relationship with the first SL resource, for example, the receiving UE (for example, the second UE) can determine the carrier corresponding to at least one SL MAC CE based on the carrier where the first SL resource is located. If there is no technical solution of the embodiment of the present application, if it is a SL scenario of multi-carrier communication, the receiving UE may not be able to determine the carrier corresponding to the SL MAC CE, resulting in a carrier determination error.
  • the receiving UE may determine the SL MAC CE originally corresponding to carrier 1 as corresponding to carrier 2, then the processing mechanism originally applied to carrier 1 may be misused for carrier 2, which may result in a decrease in communication quality or even a transmission failure.
  • the receiving UE can determine the carrier corresponding to the SL MAC CE based on the carrier where the first SL resource is located, thereby reducing the probability of SL MAC CE indicating errors for the carrier and improving the quality of side communication.
  • At least one SL MAC CE is determined based on the carrier information and the first SL resource, for example, including: determining that the carrier where the first SL resource is located includes the carrier corresponding to at least one SL MAC CE, and/or determining that the carrier corresponding to at least one SL MAC CE is the same carrier as the carrier where the first SL resource is located.
  • the SL MAC CE may be one of the at least one SL MAC CE; or, if, among the SL MAC CEs to be sent, a carrier corresponding to a SL MAC CE is not included in the carrier where the first SL resource is located, and the carrier corresponding to the SL MAC CE is a different carrier from the carrier where the first SL resource is located, then the SL MAC CE may not be included in the at least one SL MAC CE.
  • the first UE sends one SL MAC CE among at least one SL MAC CE to the second UE.
  • the second UE can determine that the carrier where the first SL resource is located includes the carrier corresponding to the SL MAC CE, or that the carrier where the first SL resource is located is the same carrier as the carrier corresponding to the SL MAC CE.
  • the second UE receives the SL MAC CE through the first SL resource, so the second UE can determine the carrier where the first SL resource is located. Then, the second UE can determine the carrier corresponding to the SL MAC CE, or determine the carrier corresponding to the information included in the SL MAC CE.
  • the SL MAC CE may include information to be sent.
  • the information to be sent may be, for example, a SL CSI report, IUC information or an IUC request, or other information, without limitation.
  • the carrier corresponding to the SL MAC CE may also be different, as described below using the second SL MAC CE as an example.
  • the second SL MAC CE may be, for example, any one of the SL MAC CEs to be sent, or any one of at least one SL MAC CE.
  • the carrier corresponding to the second SL MAC CE is, for example, a carrier for transmitting SCI, or a carrier where the SL transmission scheduled (or indicated) by the SCI is located, or a carrier where the SL resources scheduled (or indicated) by the SCI are located.
  • the SL resources scheduled (or indicated) by the SCI are, for example, SL resources for transmitting SL CSI reports.
  • the carrier where the SL transmission scheduled by the SCI is located is the carrier where the second SL MAC CE is located.
  • the SL transmission scheduled by the SCI is, for example, a SL CSI report, or other SL information.
  • the SL MAC CE including the SL CSI report is, for example, a SL CSI reporting MAC CE.
  • the SCI is, for example, from the second UE, and the SCI can instruct the first UE to send the SL CSI report.
  • the value of the CSI request field included in the SCI is "1", indicating that the SCI is used to trigger the SL CSI report.
  • the carrier transmitting the SCI is also the carrier transmitting the second SL MAC CE. Therefore, for the same-carrier scheduling, the carrier corresponding to the second SL MAC CE can be the carrier used to transmit the SCI, or it can also be the carrier where the SL transmission scheduled (or indicated) by the SCI is located, or the carrier where the SL resources scheduled (or indicated) by the SCI are located.
  • the carrier transmitting the SCI may be the carrier transmitting the second SL MAC CE, or it may not be the carrier transmitting the second SL MAC CE. Therefore, for the case of cross-carrier scheduling, the carrier corresponding to the second SL MAC CE may be the carrier where the SL transmission scheduled (or indicated) by the SCI is located, or the carrier where the SL resources scheduled (or indicated) by the SCI are located.
  • the carrier corresponding to the second SL MAC CE is, for example, the carrier where the resource pool associated with the IUC information is located, or the carrier where the resource pool where the SL resources indicated by the IUC information are located, or the carrier used to transmit the IUC information.
  • the resource pool associated with the IUC information is, for example, resource pool A configured for the first UE.
  • Resource pool A and resource pool B configured for the second UE may be the same resource pool or different resource pools, and the second UE uses the SL resources in resource pool B to send the IUC request.
  • the resource pool where the SL resources indicated by the IUC information are located may be the same resource pool as resource pool A, so the IUC
  • the carrier where the resource pool associated with the information is located and the carrier where the resource pool where the SL resources indicated by the IUC information are located can be the same carrier; and the SL resources used to transmit the IUC information can also be resources within the resource pool A. Therefore, the carrier used to transmit the IUC information and the carrier where the sending resource pool is located can also be the same carrier.
  • the second UE does not send an IUC request to the first UE, but the first UE sends the IUC information to the second UE based on other conditions.
  • the resource pool associated with the IUC information is, for example, pre-configured, or predefined by a protocol, etc., for example, called resource pool C.
  • the resource pool where the SL resources indicated by the IUC information are located and the resource pool C can be the same resource pool; and the SL resources used to transmit the IUC information can also be resources within the resource pool C. Therefore, the carrier used to transmit the IUC information and the carrier where the resource pool C is located can also be the same carrier.
  • the carrier corresponding to the second SL MAC CE is, for example, the carrier where the resource pool associated with the IUC request is located, or the carrier where the resource pool where the SL resources indicated by the IUC request are located, or the carrier used to transmit the IUC request.
  • the first UE may send an IUC request to other UEs (e.g., the second UE) to request to obtain IUC information.
  • the resource pool associated with the IUC request is, for example, the sending resource pool where the SL resources used to send the IUC request are located, for example, resource pool D.
  • the IUC request may also indicate corresponding SL resources, and the SL resources indicated by the IUC request are, for example, also included in resource pool D. Therefore, the carrier where the resource pool associated with the IUC request is located and the carrier where the resource pool where the SL resources indicated by the IUC request are located may be the same carrier.
  • the SL resource used to transmit the IUC request may also be the SL resource in the resource pool D, so the carrier where the resource pool associated with the IUC request is located and the carrier used to transmit the IUC request may also be the same carrier.
  • the first UE cannot determine at least one SL MAC CE based on the carrier information.
  • the carrier where the first SL resource is located does not include the carrier corresponding to any SL MAC CE to be sent, and the carrier corresponding to the SL MAC CE to be sent is not the same carrier as the carrier where the first SL resource is located, then the first UE cannot determine at least one SL MAC CE.
  • the first UE can perform carrier reselection or carrier selection to redetermine the carrier. After redetermining the carrier, the first UE can obtain the SL resource on the carrier, for example, called the second SL resource, and the second SL resource can be the resource used for this side transmission.
  • the first UE can re-execute S401 based on the second SL resource.
  • the first UE can determine one or more SL MAC CEs based on the carrier information.
  • the carrier information may include information about the carrier corresponding to the one or more SL MAC CEs, or include information about the carrier corresponding to the SL MAC CE to be sent.
  • One determination method is, for example, that the first UE determines one or more SL MAC CEs based on the carrier information and the second SL resource. For this process, reference can be made to the introduction in the previous text.
  • the carrier re-determined by the first UE may include all or part of the carriers corresponding to the SL MAC CE to be sent.
  • the carrier re-determined by the first UE may include the carrier corresponding to the at least one SL MAC CE.
  • the first UE can determine the SL MAC CE based on the carrier information and the second SL resources, so that the method of the embodiment of the present application can be executed.
  • the carrier reselection or carrier selection process may be completed within a first duration.
  • the first duration is, for example, a duration corresponding to a first timer (or, a first timer), and the first timer may indicate the validity period of a SL MAC CE. For example, if the first UE sends the SL MAC CE within the duration corresponding to the first timer, the SL MAC CE is valid, or the content included in the SL MAC CE is valid; or, if the first UE does not send the SL MAC CE within the duration corresponding to the first timer, the SL MAC CE is invalid, or the content included in the SL MAC CE is invalid.
  • the timing duration of the first timer is, for example, equal to the timing duration of the timer corresponding to the SL CSI reporting MAC CE, for example, the first timer is a timer corresponding to the SL CSI reporting MAC CE, or the first timer may also be other timers.
  • the second UE sends an SCI to the first UE to trigger an SL CSI report
  • the first UE may start the first timer corresponding to the SL CSI report after receiving the SCI.
  • the carrier reselection or carrier selection process can be completed within the validity period of a SL MAC CE to reduce the information transmission delay.
  • the first UE can send an indication message to the destination address of the information to be sent (for example, the address of the second UE is the destination address of the information to be sent), and the indication message can indicate that the first UE cannot send the SL MAC CE within the first time period.
  • the second UE can extend the validity period of the SL MAC CE.
  • the carrier reselection or carrier selection process can be completed within a second duration.
  • the second duration is, for example, the duration corresponding to the second timer (or, the second timer), and the time difference corresponding to the second timer is greater than the time difference corresponding to the first timer.
  • the second timer is, for example, the timer provided in the embodiment of the present application. Considering that the time required for the carrier reselection or carrier selection process may be long, if the first timer is used for timing, it is very likely that the first UE will not be able to complete the carrier reselection or carrier selection within the duration corresponding to the first timer. Therefore, the first UE can maintain the second timer (the second UE can also maintain the second timer) so that the first UE has as much time as possible to perform carrier reselection or carrier selection, thereby reducing the probability of SL MAC CE failure.
  • the first UE determines a first destination address according to at least one SL MAC CE.
  • the first destination address is a destination L2 ID, or a destination.
  • S402 can be regarded as the first step included in the SL LCP process.
  • S401 can occur before the SL LCP process, which can be understood as screening at least one SL MAC CE from the SL MAC CE to be sent according to the carrier information, and at least one SL MAC CE can participate in the SL LCP process starting from S402, while the SL MAC CE that is not screened may not participate in the SL LCP process.
  • S402 and S401 can also be regarded as the same step.
  • the first UE can determine at least one SL MAC CE according to the carrier information, and then determine the first destination address according to the at least one SL MAC CE, which is equivalent to improving the first step of the existing SL LCP process.
  • the embodiment of the present application selects at least one SL MAC CE from the SL MAC CE to be sent through the carrier information, and the at least one selected SL MAC CE can continue to participate in the SL LCP process, for example, to participate in determining the first destination address, while the unselected SL MAC CE may not participate in determining the first destination address. This reduces the number of SL MAC CEs participating in determining the first destination address and simplifies the process of determining the first destination address.
  • the first UE determines the first destination address according to at least one SL MAC CE. For example, one way is that the first UE determines the first destination address according to the priority of at least one SL MAC CE. For example, the first UE may determine that the destination address associated with the SL MAC CE with the highest priority among the at least one SL MAC CE is the first destination address.
  • the first UE determines the first destination address based on at least one SL MAC CE.
  • the first UE determines the first destination address based on the priority of at least one SL MAC CE and the priority of the LCH to be sent.
  • the first UE can determine that the SL MAC CE and/or the destination address associated with the LCH with the highest priority among at least one SL MAC CE and the LCH to be sent is the first destination address.
  • the number of LCHs to be sent can be one or more.
  • the destination address associated with a SL MAC CE is, for example, the address of the receiving end for receiving the SL MAC CE, and the understanding of the destination address associated with the LCH is similar.
  • the first UE can determine the SL MAC CE with the highest priority and meeting the first condition from at least one SL MAC CE, and/or determine the LCH with the highest priority and meeting the first condition from the LCH to be sent.
  • the first UE can determine the selected SL MAC CE and/or the destination address associated with the LCH as the first destination address.
  • the first UE may determine the SL MAC CE with the highest priority from at least one SL MAC CE, and/or determine the LCH with the highest priority and satisfying the first condition from the LCHs to be sent, and the first UE may determine that the destination address associated with the selected SL MAC CE and/or LCH is the first destination address.
  • the first UE may filter the SL MAC CE according to the first condition, or may not filter the SL MAC CE according to the first condition (or, the SL MAC CE does not have to satisfy the first condition).
  • the first condition includes, for example: having valid SL transmission information, and/or allowing the use of the first SL resource (or, the second SL resource) corresponding to the corresponding SL configuration authorization (configured grant, CG) type (type) 1.
  • an LCH has valid SL transmission information, which means that the LCH is not empty or that the LCH has information to be transmitted;
  • an SL MAC CE has valid SL transmission information, which means that the SL MAC CE is not empty or that the SL MAC CE has information to be transmitted.
  • the first SL resource (or, the second SL resource) is CG type1
  • the first SL resource (or, the second SL resource) can be used for transmission only when the LCH configuration allows the use of CG type1, otherwise the first SL resource (or, the second SL resource) cannot be used for transmission.
  • the first condition satisfied by LCH and the first condition satisfied by SL MAC CE may be the same or different.
  • the first condition satisfied by SL MAC CE may include some of the conditions included in the first condition introduced above.
  • the first condition satisfied by SL MAC CE may include the condition of having valid SL transmission information, but does not include the condition of allowing the use of the first SL resource (or, the second SL resource) corresponding to the corresponding SL CG type1; or, the first condition satisfied by SL MAC CE may include the condition of allowing the use of the first SL resource (or, the second SL resource) corresponding to the corresponding SL CG type1, but does not include the condition of having valid SL transmission information.
  • the first UE determines the first LCH and/or the first SL MAC CE based on the first destination address.
  • S403 can be regarded as the second step included in the SL LCP process.
  • the first UE determines the first destination address, and the first destination address can be associated with one or more LCHs, and/or, associated with one or more SL MAC CEs.
  • the first UE can determine the first LCH from the LCH associated with the first destination address, and/or, determine the first SL MAC CE from the SL MAC CE associated with the first destination address.
  • the number of LCHs included in the first LCH can be greater than or equal to 1, and the number of SL MAC CEs included in the first SL MAC CE can be greater than or equal to 1.
  • the first UE may determine the LCH that satisfies the second condition from the LCH associated with the first destination address, and/or determine the SL MAC CE that satisfies the second condition from the SL MAC CE associated with the first destination address.
  • the first UE may determine the LCH that satisfies the second condition from the LCH associated with the first destination address, and/or determine the SL MAC CE associated with the first destination address. That is, the first The UE may filter the SL MAC CE according to the second condition, or may not filter the SL MAC CE according to the second condition (or, the SL MAC CE does not have to meet the second condition).
  • the second condition includes one or more of the following: having valid SL transmission information, allowing the use of the SL CG type corresponding to the first SL resource (or, the second SL resource), the hybrid automatic repeat request (HARQ) feedback enabled (enabled)/disabled (disabled) attribute corresponding to the highest priority LCH associated with the first destination address or the highest priority and meeting the first condition is the same, or, the HARQ feedback enabled/disabled attribute corresponding to the SL MAC CE with the highest priority associated with the first destination address or the highest priority and meeting the first condition is the same.
  • HARQ hybrid automatic repeat request
  • the LCH with the highest priority among the LCHs associated with the first destination address is enabled, only the enabled LCH or SL MAC CE can be selected in S403; or, if the LCH with the highest priority among the LCHs associated with the first destination address is disabled, only the disabled LCH or SL MAC CE can be selected in S403.
  • the second condition satisfied by the LCH may be the same as or different from the second condition satisfied by the SL MAC CE.
  • the second condition satisfied by the SL MAC CE may include some of the conditions included in the second condition as described above.
  • the second condition satisfied by the SL MAC CE may include the condition of having valid SL transmission information, and the condition of allowing the use of the SL CG type corresponding to the first SL resource (or, the second SL resource), but does not include the condition that the attribute of HARQ feedback enabled/disabled corresponding to the SL MAC CE with the highest priority associated with the first destination address or the highest priority and satisfying the first condition is the same; or, the second condition satisfied by the SL MAC CE may include the condition of having the same attribute of HARQ feedback enabled/disabled corresponding to the SL MAC CE with the highest priority associated with the first destination address or the highest priority and satisfying the first condition, and the condition of having valid SL transmission information, but does not include the condition of allowing the use of the SL
  • the first SL MAC CE may belong to at least one SL MAC CE in S401, or it can be understood that the first SL MAC CE may be determined according to carrier information.
  • the first UE may determine the SL MAC CE that satisfies the second condition from the SL MAC CE associated with the first destination address, and then determine the first SL MAC CE from the SL MAC CE that satisfies the second condition according to the carrier information; or, the first UE may determine M SL MAC CEs from the SL MAC CEs associated with the first destination address according to the carrier information, and then determine the first SL MAC CE that satisfies the second condition from the M SL MAC CEs, where M is a positive integer; or, the first UE may determine the first SL MAC CE from the SL MAC CE associated with the first destination address according to the carrier information.
  • the manner in which the first UE determines the SL MAC CE according to the carrier information can refer to the introduction in the previous text.
  • the carrier information can also act on the second step of the SL LCP process, so that the first SL MAC CE determined by the SL LCP process is determined according to the carrier information.
  • the first UE sends the first SL MAC CE to the second UE.
  • the second UE can determine that the carrier where the first SL resource (or, the second SL resource) is located includes the carrier corresponding to the first SL MAC CE, or determine that the carrier where the first SL resource (or, the second SL resource) is located is the same carrier as the carrier corresponding to the first SL MAC CE.
  • the second UE receives the first SL MAC CE through the first SL resource (or, the second SL resource), so the second UE can determine the carrier where the first SL resource (or, the second SL resource) is located, and the second UE can determine the carrier corresponding to the first SL MAC CE, or determine the carrier corresponding to the information included in the first SL MAC CE. Therefore, even in a multi-carrier SL scenario, the receiving UE can determine the carrier corresponding to the received SL MAC CE, reducing the probability of SL MAC CE indicating an error in the carrier and improving the quality of sideline communication.
  • the carrier information may not be used in the second step of the SL LCP process, and the first SL MAC CE may belong to the at least one SL MAC CE in S401, or may not belong to the at least one SL MAC CE. It can be understood that whether the first SL MAC CE belongs to the at least one SL MAC CE depends on whether the at least one SL MAC CE is associated with the first destination address, or whether the at least one SL MAC CE is associated with the first destination address and satisfies the second condition, and has nothing to do with the carrier information.
  • the method may further include S404 and S405.
  • the first UE allocates the first SL resources (or, the second SL resources) to the first LCH and/or the first SL MAC CE.
  • the first UE may allocate the first SL resource (or, the second SL resource) to the first LCH and/or the first SL MAC CE according to the priority of the first LCH and/or the priority of the first SL MAC CE. For example, the first UE may first allocate SL resources for transmission information with higher priority (such as LCH and/or SL MAC CE), and then allocate SL resources for transmission information with lower priority.
  • the first SL resource or, the second SL resource
  • a priority order from high to low is: priority of information carried by the signaling control channel (SCCH)> priority of SL-CSI reporting MAC CE> priority of sidelink inter-UE coordination request MAC CE (sidelink inter-UE coordination request MAC CE) and priority of sidelink inter-UE coordination information MAC CE (sidelink inter-UE coordination information MAC CE)> priority of sidelink discontinuous reception control MAC CE (SL DRX command MAC CE)> priority of information carried by any sidelink traffic channel (STCH).
  • SCCH signaling control channel
  • STCH sidelink traffic channel
  • the priority of the first SL MAC CE is The priority level may be higher than the priority level of the first LCH, the first UE may preferentially allocate the first SL resource (or the second SL resource) to the first SL MAC CE. If there are still remaining resources in the first SL resource (or the second SL resource), the first UE will allocate the remaining resources to the first LCH.
  • the priority of the first SL MAC CE may be lower than that of the first LCH, and the first UE may preferentially allocate the first SL resource (or the second SL resource) to the first LCH. If there are remaining resources in the first SL resource (or the second SL resource), the first UE allocates the remaining resources to the first SL MAC CE.
  • the first UE sends a first LCH and/or a first SL MAC CE.
  • the receiving ends of the first LCH and the first SL MAC CE may be the same or different.
  • the second UE may receive the first LCH and/or the first SL MAC CE from the first UE.
  • the first UE can determine at least one SL MAC CE according to the carrier information, so that at least one SL MAC CE can participate in the SL LCP process, which is equivalent to the embodiment of the present application screening out some SL MAC CEs from the SL MAC CEs to be sent through the carrier information, and the at least one SL MAC CE screened out can participate in the SL LCP process, for example, participating in determining the first destination address, while the SL MAC CE that is not screened out may not participate in determining the first destination address.
  • the number of SL MAC CEs participating in determining the first destination address is reduced, and the process of determining the first destination address is simplified.
  • the first SL MAC CE may belong to at least one SL MAC CE in S401, for example, the first UE sends the first SL MAC CE to the second UE, and after receiving the first SL MAC CE, the second UE can determine the carrier corresponding to the first SL MAC CE, or determine the carrier corresponding to the information included in the first SL MAC CE. Therefore, even in the multi-carrier SL scenario, the receiving end UE can determine the carrier corresponding to the received SL MAC CE, reducing the probability of the SL MAC CE indicating an error in the carrier, and improving the sideline communication quality.
  • the first UE may determine at least one SL MAC CE according to the carrier information before executing the SL LCP process, or may determine at least one SL MAC CE according to the carrier information when executing the first step of the SL LCP, or may consider the SL MAC CE determined according to the carrier information when executing both the first and second steps of the SL LCP.
  • an embodiment of the present application provides a second communication method, in which the first UE may consider the SL MAC CE determined according to the carrier information when executing the second step of the SL LCP, but may not consider the SL MAC CE determined according to the carrier information when executing the first step of the SL LCP.
  • FIG5 is a flow chart of the method.
  • the first UE determines a first destination address according to an LCH and/or SL MAC CE to be sent.
  • the first destination address is a destination L2 ID, or a destination.
  • S501 can be regarded as the first step included in the SL LCP process.
  • the first UE has LCH and/or SL MAC CE to be sent, and the first UE also determines the SL resources (for example, called the first SL resources) for this transmission. Then, through the SL LCP process, the first UE can determine which LCHs and/or SL MAC CEs to be sent can be allocated to the first SL resources. If the first UE works in mode 1, the first SL resource can be the SL resource requested by the first UE to the access network device; if the first UE works in mode 2, the first SL resource can be the SL resource selected by the first UE from the SL resource pool.
  • LCHs to be sent There can be one or more LCHs to be sent, and the LCH to be sent can also be understood as the LCH associated with the destination address of the information to be sent, and the LCH includes the information to be sent.
  • the information to be sent included in the LCH is the same as or different from the information to be sent included in the SL MAC CE.
  • the first UE determines the first destination address according to the LCH and/or SL MAC CE to be sent. For example, one way is that the first UE determines the first destination address according to the priority of the LCH to be sent and/or the priority of the SL MAC CE. For example, the first UE can determine that the destination address associated with the LCH and/or SL MAC CE with the highest priority among the LCH and/or SL MAC CE to be sent is the first destination address.
  • the number of LCHs to be sent may be one or more.
  • the number of SL MAC CEs to be sent may be one or more.
  • the destination address associated with an SL MAC CE is, for example, the address of the receiving end for receiving the SL MAC CE. The understanding of the destination address associated with the LCH is similar.
  • the first UE determines the first destination address based on the LCH and/or SL MAC CE to be sent. Another way is that the first UE can determine the SL MAC CE with the highest priority and satisfying the first condition from the SL MAC CE to be sent, and/or determine the LCH with the highest priority and satisfying the first condition from the LCH to be sent, and the first UE can determine that the destination address associated with the selected SL MAC CE and/or LCH is the first destination address.
  • the first UE can determine the SL MAC CE with the highest priority from the SL MAC CE to be sent, and/or determine the LCH with the highest priority and satisfying the first condition from the LCH to be sent, and the first UE can determine that the destination address associated with the selected SL MAC CE and/or LCH is the first destination address.
  • the first condition please refer to S402 in the embodiment shown in Figure 4.
  • the first UE determines the first SL MAC CE from the SL MAC CE associated with the first destination address according to the carrier information.
  • S502 can be regarded as the second step included in the SL LCP process.
  • the first UE determines the first destination address, and the first destination address can be associated with one or more LCHs, and/or, associated with one or more SL MAC CEs.
  • the first UE can determine the first LCH from the LCH associated with the first destination address, and/or, determine the first SL MAC CE from the SL MAC CE associated with the first destination address according to the carrier information.
  • the number of LCHs included in the first LCH can be greater than or equal to 1
  • the number of SL MAC CEs included in the first SL MAC CE can be greater than or equal to 1.
  • the carrier information may include information about the carrier corresponding to the first SL MAC CE, or the carrier information may include information about the carriers corresponding to all SL MAC CEs associated with the first destination address.
  • the first UE determines the first SL MAC CE from the SL MAC CE associated with the first destination address based on the carrier information. For example, one method is that the first UE determines the first SL MAC CE from the SL MAC CE associated with the first destination address based on the carrier information and the first SL resource.
  • the carrier corresponding to the first SL MAC CE determined in this way may have a corresponding relationship with the first SL resource.
  • the receiving UE (such as the second UE) can determine the carrier corresponding to the first SL MAC CE based on the carrier where the first SL resource is located. Therefore, even in the SL scenario of multi-carrier communication, the receiving UE can determine the carrier corresponding to the SL MAC CE based on the carrier where the first SL resource is located, thereby reducing the probability of SL MAC CE indicating an error in the carrier and improving the quality of sideline communication.
  • the first SL MAC CE is determined from the SL MAC CE associated with the first destination address according to the carrier information and the first SL resource, for example, including: determining that the carrier where the first SL resource is located includes the carrier corresponding to the first SL MAC CE, and/or determining that the carrier corresponding to the first SL MAC CE is the same carrier as the carrier where the first SL resource is located.
  • the carrier corresponding to the first SL MAC CE please refer to S401 of the embodiment shown in Figure 4.
  • the first UE may determine an LCH satisfying the second condition from the LCH associated with the first destination address, such as the first LCH; and/or determine at least one SL MAC CE satisfying the second condition from the SL MAC CE associated with the first destination address, and then determine the first SL MAC CE from at least one SL MAC CE based on the carrier information and the first SL resource (or, determine at least one SL MAC CE from the SL MAC CE associated with the first destination address based on the carrier information and the first SL resource, and then determine the first SL MAC CE satisfying the second condition from at least one SL MAC CE; or, determine the first SL MAC CE from the SL MAC CE associated with the first destination address based on the carrier information and the first SL resource).
  • the second condition reference may be made to S403 of the embodiment shown in FIG. 4 .
  • the method may further include S503 and S504.
  • S503 For more details about S503 , please refer to S404 in the embodiment shown in FIG. 4 .
  • the first UE sends a first LCH and/or a first SL MAC CE.
  • the receiving ends of the first LCH and the first SL MAC CE may be the same or different.
  • the second UE may receive the first LCH and/or the first SL MAC CE from the first UE.
  • the first UE cannot determine the SL MAC CE from the SL MAC CE associated with the first destination address based on the carrier information.
  • the carrier where the first SL resource is located does not include the carrier corresponding to any SL MAC CE associated with the first destination address, and the carrier corresponding to the SL MAC CE associated with the first destination address is not the same carrier as the carrier where the first SL resource is located, then the first UE cannot determine the SL MAC CE.
  • the first UE can perform carrier reselection or carrier selection to redetermine the carrier.
  • the first UE can obtain the SL resource on the carrier, for example, called the second SL resource, and the second SL resource can be the resource used for this side transmission.
  • the first UE can re-execute S501 to S504 based on the second SL resource.
  • the carrier re-determined by the first UE may include all or part of the carriers corresponding to the SL MAC CE associated with the first destination address.
  • the carrier re-determined by the first UE may include the carrier corresponding to the first SL MAC CE.
  • the first UE can determine the first SL MAC CE based on the carrier information and the second SL resources, so that the method of the embodiment of the present application can be executed.
  • the carrier reselection or carrier selection process can be completed within the first time length. For this, reference may be made to S401 of the embodiment shown in FIG. 4 .
  • the first UE may send an indication message to the destination address of the information to be sent (for example, the address of the second UE is the destination address of the information to be sent), and the indication message may indicate that the first UE cannot send the SL MAC CE within the first time length.
  • the second UE may extend the validity period of the SL MAC CE.
  • the carrier reselection or carrier selection process may be completed within the second time period. For this, reference may be made to S402 of the embodiment shown in FIG. 4 .
  • the first UE can determine the first SL MAC CE according to the carrier information in the second step of the SL LCP. For example, the first UE sends the first SL MAC CE to the second UE, and the second UE can determine the first SL after receiving the first SL MAC CE.
  • the carrier corresponding to the MAC CE, or the carrier corresponding to the information included in the first SL MAC CE, is determined.
  • the receiving UE can determine the carrier corresponding to the received SL MAC CE, reducing the probability of SL MAC CE indicating an error in the carrier and improving the quality of sideline communications.
  • the first UE sends a SL MAC CE on a certain SL carrier, it can indicate that the SL MAC CE corresponds to the SL carrier, or that the content included in the SL MAC CE corresponds to the SL carrier. Therefore, the format of the SL MAC CE can adopt an existing format, such as a first format.
  • a third communication method provided in an embodiment of the present application is introduced. In this method, the format of the SL MAC CE can be changed so that the SL MAC CE can be applicable to a multi-carrier scenario. Please refer to FIG. 6, which is a flow chart of the method.
  • the first UE determines the SL MAC CE.
  • the SL MAC CE may include the first information.
  • the format of the SL MAC CE is the second format, and under the second format, the SL MAC CE also includes information about the resources corresponding to the SL MAC CE.
  • the first UE may determine that the format of the SL MAC CE is the second format based on the carrier information.
  • the carrier information for example, includes information about the carrier corresponding to the SL MAC CE, and/or includes the number of carriers used for communication between the first UE and the second UE. This part of the content will be introduced in other subsequent embodiments.
  • the first information is, for example, information to be sent carried by the SL MAC CE, such as a SL CSI report, IUC information or an IUC request.
  • the resources corresponding to the SL MAC CE are, for example, a carrier and/or a resource pool. Depending on the first information, the resources corresponding to the SL MAC CE may also be different, as shown in the following example.
  • the first information is a SL CSI report (optionally, in this case, the SL MAC CE is, for example, a SL CSI reporting MAC CE).
  • the resource corresponding to the SL MAC CE may be a carrier.
  • the carrier corresponding to the SL MAC CE is a carrier used to transmit the SCI, or a carrier where the SL transmission scheduled (or indicated) by the SCI is located, or a carrier where the SL resources scheduled (or indicated) by the SCI are located.
  • the SL resources scheduled (or indicated) by the SCI are, for example, SL resources used to transmit the SL CSI report.
  • the carrier where the SL transmission scheduled by the SCI is located is the carrier where the SL MAC CE is located.
  • the SCI comes from the second UE, and the SCI can instruct the first UE to send the SL CSI report.
  • the value of the CSI request field included in the SCI is "1", indicating that the SCI is used to trigger the SL CSI report.
  • S401 in the embodiment shown in Figure 4.
  • the first information is IUC information (optionally, in this case, the SL MAC CE is, for example, IUC information MAC CE).
  • the resource corresponding to the SL MAC CE may be a carrier.
  • the carrier corresponding to the SL MAC CE is the carrier where the resource pool associated with the IUC information is located, or the carrier where the resource pool where the SL resource indicated by the IUC information is located is located, or the carrier used to transmit the IUC information.
  • the resource corresponding to the SL MAC CE may also be a resource pool.
  • the resource pool corresponding to the SL MAC CE is a resource pool associated with the IUC information, or a resource pool where the SL resource indicated by the IUC information is located, or a resource pool where the SL resource used to transmit the IUC information is located.
  • the first information is an IUC request (optionally, in this case, the SL MAC CE is, for example, an IUC request MAC CE).
  • the resource corresponding to the SL MAC CE may be a carrier.
  • the carrier corresponding to the SL MAC CE is the carrier where the resource pool associated with the IUC request is located, or the carrier where the resource pool where the SL resource indicated by the IUC request is located is located, or the carrier used to transmit the IUC request.
  • the resource corresponding to the SL MAC CE may also be a resource pool.
  • the resource pool corresponding to the SL MAC CE is a resource pool associated with the IUC request, or a resource pool where the SL resource indicated by the IUC request is located, or a resource pool where the SL resource used to transmit the IUC request is located.
  • the SL MAC CE includes information about the resources corresponding to the SL MAC CE.
  • the SL MAC CE includes the index of the resources corresponding to the SL MAC CE, for example, the index of the carrier corresponding to the SL MAC CE and/or the index of the resource pool corresponding to the SL MAC CE.
  • the index of the carrier and/or the index of the resource pool can be predefined by the protocol; or can be pre-configured to the first UE by the access network device, and then configured to the second UE by the first UE; or can be pre-configured to the first UE and the second UE respectively by the access network device; or can be determined by negotiation between the first UE and the second UE. Then the SL MAC CE only needs to include the index of the carrier or the index of the resource pool, and the second UE can determine the corresponding carrier or resource pool.
  • the SL MAC CE may include the resource corresponding to the SL MAC CE.
  • the information of a carrier does not necessarily include the information of the resource pool included in the carrier.
  • the SL MAC CE may include information about the resource pool corresponding to the SL MAC CE but not information about the carrier where the resource pool is located, or the SL MAC CE may also include information about the resource pool corresponding to the SL MAC CE and information about the carrier where the resource pool is located.
  • the SL MAC CE may include the index of the resource pool but not the index of the carrier where the resource pool is located, and even in the case of multiple carriers, the second UE can uniquely determine the resource pool based on the index of a resource pool.
  • the resource pools on different carriers are numbered separately, that is, the index of a resource pool may not uniquely correspond to a resource pool on a carrier, but two resource pools on different carriers may use the same index.
  • the SL MAC CE may include the index of the resource pool and the index of the carrier where the resource pool is located, so that the second UE can uniquely determine the resource pool based on the two indexes.
  • the SL MAC CE may include a bitmap, and the number of bits included in the bitmap is the same as the total number of resources used for communication between the first UE and the second UE, or the same as the number of resources configured for the first UE, and the resource is, for example, a carrier or a resource pool.
  • the number of bits included in the bitmap may be the same as the number of carriers for communication between the first UE and the second UE, or the same as the number of carriers configured for the first UE.
  • the bits included in the bitmap may correspond one-to-one to the carriers configured for the first UE, for example, if the value of a certain bit of the bitmap is "1", it indicates that the SL MAC CE corresponds to the carrier corresponding to the bit, and if the value of the bit is "0", it indicates that the SL MAC CE does not correspond to the carrier corresponding to the bit. If the bits included in the bitmap correspond one-to-one to the number of resource pools configured for the first UE, the implementation method is also similar. Among them, if the bitmap is used to indicate the resource pool corresponding to the SL MAC CE, the resource pools on different carriers may be uniformly numbered.
  • the SL MAC CE may also include information about the resources corresponding to the SL MAC CE in other ways, and there is no restriction on this.
  • the information of the resources corresponding to the SL MAC CE can be carried by the N bits included in the SL MAC CE, where N is a positive integer.
  • the existing SL MAC CE includes 8 bits, 3 of which are reserved (R) bits, and reference may be made to FIG. 7A for this. Then N can be less than or equal to 3, which is equivalent to using the reserved bits in the SL MAC CE to carry the information of the resources corresponding to the SL MAC CE.
  • the SL MAC CE includes the index of the resources corresponding to the SL MAC CE, and reference may be made to FIG. 7B, which is an example of using 3 reserved bits to carry the index of the resources corresponding to the SL MAC CE.
  • the values of the 3 reserved bits are "001", for example, the value indicates that the index of the carrier corresponding to the SL MAC CE is "1", indicating that the carrier corresponding to the SL MAC CE is carrier 1.
  • the method also includes S602, the first UE sends the SL MAC CE through the first SL resource.
  • the second UE receives the SL MAC CE from the first UE through the first SL resource.
  • first SL resource reference may be made to the introduction of the embodiment shown in FIG4.
  • the first SL resource can be used to send the SL MAC CE, for example, the first SL resource can be used to send the SL MAC CE and the sub-header of the SL MAC CE, then the first UE can send the SL MAC CE through the first SL resource; or, if no SL resource can be used to send the SL MAC CE, for example, no SL resource can be used to send the SL MAC CE and the sub-header of the SL MAC CE, then the first UE may not send the SL MAC CE, or the first UE may request SL resources from the access network device and then send the SL MAC CE.
  • the second UE can determine the resources corresponding to the SL MAC CE based on the information of the resources corresponding to the SL MAC CE included in the SL MAC CE, thereby removing the constraint relationship between the transmission of the SL MAC CE and the carrier.
  • the SL MAC CE corresponding to carrier 1 can be transmitted on carrier 1 or on other carriers, making the transmission of SL MAC CE more flexible.
  • the SL MAC CE can adopt the first format or the second format.
  • the fourth communication method provided in the embodiments of the present application is introduced below, through which the format of the SL MAC CE can be determined. Please refer to Figure 8, which is a flow chart of the method.
  • the first UE determines whether the format of the SL MAC CE is the first format or the second format based on the carrier information.
  • the SL MAC CE when the format of the SL MAC CE is the second format, the SL MAC CE includes information of resources corresponding to the SL MAC CE; or, when the format of the SL MAC CE is the first format, the SL MAC CE does not include information of resources corresponding to the SL MAC CE.
  • the resources corresponding to the SL MAC CE and the information of resources corresponding to the SL MAC CE reference may be made to the relevant introduction of S601 in the embodiment shown in FIG. 6 .
  • the carrier information includes, for example, information about the carrier corresponding to the SL MAC CE, and/or includes the number of carriers used for communication between the first UE and the second UE.
  • the first UE determines whether the format of the SL MAC CE is the first format or the second format according to the carrier information. For example, if the carrier where the first SL resource is located includes the carrier corresponding to the SL MAC CE, then the format of the SL MAC CE is the first format or the second format. format, otherwise, if the carrier where the first SL resource is located does not include the carrier corresponding to the SL MAC CE, the format of the SL MAC CE is the second format.
  • the first SL resource is a resource used for SL transmission, for example, a SL resource used to send the SL MAC CE. It can be understood that if the carrier where the first SL resource is located includes the carrier corresponding to the SL MAC CE, then the SL MAC CE is transmitted on the first SL resource, and the second UE can determine the carrier corresponding to the SL MAC CE based on the first SL resource, without having to indicate the resource corresponding to the SL MAC CE in the SL MAC CE. Therefore, in this case, the SL MAC CE can adopt the first format.
  • the carrier where the first SL resource is located does not include the carrier corresponding to the SL MAC CE
  • the SL MAC CE is transmitted on the first SL resource, and the second UE may not be able to determine the carrier corresponding to the SL MAC CE based on the first SL resource, so the resource corresponding to the SL MAC CE can be indicated in the SL MAC CE.
  • the SL MAC CE can adopt the second format.
  • the first UE determines whether the format of the SL MAC CE is the first format or the second format according to the carrier information. For example, another way is that if the carrier where the first SL resource is located is the same carrier as the carrier corresponding to the SL MAC CE, the format of the SL MAC CE is the first format. Otherwise, if the carrier where the first SL resource is located is different from the carrier corresponding to the SL MAC CE, the format of the SL MAC CE is the second format.
  • the carrier where the first SL resource is located is the same carrier as the carrier corresponding to the SL MAC CE, then the SL MAC CE is transmitted on the first SL resource, and the second UE can determine the carrier corresponding to the SL MAC CE according to the first SL resource, without having to indicate the resource corresponding to the SL MAC CE in the SL MAC CE. Therefore, in this case, the SL MAC CE can adopt the first format. However, if the carrier where the first SL resource is located is different from the carrier corresponding to the SL MAC CE, then the SL MAC CE is transmitted on the first SL resource.
  • the second UE may not be able to determine the carrier corresponding to the SL MAC CE based on the first SL resource. Therefore, the resource corresponding to the SL MAC CE can be indicated in the SL MAC CE. In this case, the SL MAC CE can adopt the second format.
  • the first UE determines that the format of the SL MAC CE is the first format or the second format according to the carrier information. For example, another way is that if the number of carriers used for communication between the first UE and the second UE is 1, the format of the SL MAC CE is the first format, otherwise, if the number of carriers used for communication between the first UE and the second UE is greater than 1, the format of the SL MAC CE is the second format.
  • the SL MAC CE can adopt the first format.
  • the SL MAC CE is transmitted on the first SL resource, and the second UE may not be able to determine the carrier corresponding to the SL MAC CE according to the first SL resource, so it can indicate the resource corresponding to the SL MAC CE in the SL MAC CE.
  • the SL MAC CE can adopt the second format.
  • any two or three of the above three methods in which the first UE determines the SL MAC CE format according to the carrier information may be combined. For example, if the number of carriers used for communication between the first UE and the second UE is greater than 1, the first UE may directly determine that the format of the SL MAC CE is the second format, or may determine the format of the SL MAC CE in combination with any of the first two methods. For example, if the carrier where the first SL resource is located includes the carrier corresponding to the SL MAC CE, the format of the SL MAC CE is the first format, otherwise, if the carrier where the first SL resource is located does not include the carrier corresponding to the SL MAC CE, the format of the SL MAC CE is the second format.
  • the format of the SL MAC CE is the first format, otherwise, if the carrier where the first SL resource is located is different from the carrier corresponding to the SL MAC CE, the format of the SL MAC CE is the second format.
  • the first UE may also use other methods to determine the format of the SL MAC CE, which is not limited.
  • the information included in the SL MAC CE and the resources corresponding to the SL MAC CE please refer to the relevant introduction of the embodiment shown in Figure 4 or the embodiment shown in Figure 6.
  • the method may further include S802, the first UE sends the SL MAC CE.
  • the second UE receives the SL MAC CE from the first UE. If the format of the SL MAC CE is the second format, the second UE can obtain the information of the resources corresponding to the SL MAC CE included in the SL MAC CE, thereby determining the resources corresponding to the SL MAC CE. Alternatively, if the format of the SL MAC CE is the first format, the SL MAC CE does not include the information of the resources corresponding to the SL MAC CE.
  • the second UE can determine the information of the resources corresponding to the SL MAC CE based on the carrier receiving the SL MAC CE, and reference may be made to the description of the embodiment shown in FIG. 4 or the embodiment shown in FIG. 5; alternatively, if the format of the SL MAC CE is the first format, and the first UE and the second UE communicate via a single carrier, the second UE can determine that the SL MAC CE corresponds to the carrier.
  • the first UE may determine the format of the SL MAC CE in a corresponding manner so that the SL MAC CE can adopt a more appropriate format.
  • the second UE may also determine the format of the SL MAC CE in the same manner as the first UE. Therefore, the first UE and the second UE can have the same understanding of the format of the SL MAC CE, reducing the probability of indication errors.
  • the embodiment shown in FIG8 may be combined with the embodiment shown in FIG4 (or the embodiment shown in FIG5), or may be combined with the embodiment shown in FIG6.
  • the first UE may determine that the format of the SL MAC CE is the first format according to the method provided in the embodiment shown in FIG8.
  • the first UE may determine the format of the SL MAC CE before executing the SL LCP according to the method provided in the embodiment shown in Figure 8.
  • the first UE may determine the format of the SL MAC CE before S401, and then all SL MAC CEs involved starting from S401 adopt this format; or, the first UE may determine the format of the SL MAC CE in S401 or after S401, for example, the first UE may determine that the format of at least one SL MAC CE is the first format or the second format in S401 or after S401; or, the first UE may also determine the format of the SL MAC CE during the SL LCP process, for example, determining that the format of the first SL MAC CE is the first format or the second format in S402, after S402, in S403, after S403, in S404, after S404, in S405, or after S405; or, the first UE may also determine the format of the SL MAC CE after the SL LCP process is completed.
  • the first UE may also determine that the format of the SL MAC CE is the second format according to the method provided in the embodiment shown in FIG8. For example, in the embodiment shown in FIG5, the first UE may determine the format of the SL MAC CE according to the method provided in the embodiment shown in FIG8 before executing the SL LCP.
  • the first UE may determine the format of the SL MAC CE before S501, and all SL MAC CEs involved from S501 onwards adopt the format; or, the first UE may determine the format of the SL MAC CE in S501 or after S501; or, the first UE may also determine the format of the SL MAC CE in the process of the SL LCP, for example, in S502, after S502, in S503, after S503, in S504, or after S504, determine that the format of the first SL MAC CE is the first format or the second format, etc.; or, the first UE may also determine the format of the SL MAC CE after the process of the SL LCP is completed.
  • the first UE may also determine that the format of the SL MAC CE is the second format according to the method provided in the embodiment shown in FIG8. For example, in the embodiment shown in FIG6, the first UE may determine the format of the SL MAC CE according to the method provided in the embodiment shown in FIG8 before S601, and then all SL MAC CEs involved from S601 onwards adopt this format; or, the first UE may also determine that the format of the first SL MAC CE is the first format or the second format in S601, after S601, in S602, or after S602.
  • FIG. 8 is not combined with any of the aforementioned embodiments, but is applied separately.
  • FIG9 shows a schematic diagram of the structure of a communication device provided in an embodiment of the present application.
  • the communication device 900 may be the first UE or the circuit system of the first UE described in any of the embodiments shown in FIG4, FIG5, FIG6 or FIG8, and is used to implement the method corresponding to the first UE in the above method embodiment.
  • a circuit system is a chip system.
  • the communication device 900 includes at least one processor 901.
  • the processor 901 can be used for internal processing of the device to implement certain control processing functions.
  • the processor 901 includes instructions.
  • the processor 901 can store data.
  • different processors can be independent devices, can be located in different physical locations, and can be located on different integrated circuits.
  • different processors can be integrated into one or more processors, for example, integrated on one or more integrated circuits.
  • the communication device 900 includes one or more memories 903 for storing instructions.
  • data may also be stored in the memory 903.
  • the processor and the memory may be provided separately or integrated together.
  • the communication device 900 includes a communication line 902 and at least one communication interface 904. Since the memory 903, the communication line 902 and the communication interface 904 are all optional, they are all indicated by dotted lines in FIG. 9 .
  • the communication device 900 may further include a transceiver and/or an antenna.
  • the transceiver may be used to send information to other devices or receive information from other devices.
  • the transceiver may be referred to as a transceiver, a transceiver circuit, an input/output interface, etc., and is used to implement the transceiver function of the communication device 900 through an antenna.
  • the transceiver includes a transmitter and a receiver.
  • the transmitter may be used to generate a radio frequency signal from a baseband signal
  • the receiver may be used to convert the radio frequency signal into a baseband signal.
  • Processor 901 may include a general-purpose central processing unit (CPU), a microprocessor, an application specific integrated circuit (ASIC), or one or more integrated circuits for controlling the execution of the program of the present application.
  • CPU central processing unit
  • ASIC application specific integrated circuit
  • the communication link 902 may include a pathway for transmitting information between the above-mentioned components.
  • the communication interface 904 uses any transceiver-like device for communicating with other devices or communication networks, such as Ethernet, radio access network (RAN), wireless local area networks (WLAN), wired access networks, etc.
  • RAN radio access network
  • WLAN wireless local area networks
  • wired access networks etc.
  • the memory 903 may be a read-only memory (ROM) or other types of memory that can store static information and instructions.
  • ROM read-only memory
  • RAM random access memory
  • EEPROM electrically erasable programmable read-only memory
  • CD-ROM compact disc read-only memory
  • optical disk storage including compressed optical disk, laser disk, optical disk, digital versatile disk, Blu-ray disk, etc.
  • magnetic disk storage medium or other magnetic storage device or any other medium that can be used to carry or store the desired program code in the form of instructions or data structures and can be accessed by a computer, but is not limited to this.
  • the memory 903 can exist independently and be connected to the processor 901 through the communication line 902. Alternatively, the memory 903 can also be integrated with the processor 901.
  • the memory 903 is used to store computer-executable instructions for executing the solution of the present application, and the execution is controlled by the processor 901.
  • the processor 901 is used to execute the computer-executable instructions stored in the memory 903, thereby implementing the steps performed by the first UE in any of the embodiments shown in FIG. 4, FIG. 5, FIG. 6 or FIG. 8.
  • the computer-executable instructions in the embodiments of the present application may also be referred to as application code, which is not specifically limited in the embodiments of the present application.
  • the processor 901 may include one or more CPUs, such as CPU0 and CPU1 in FIG. 9 .
  • the communication device 900 may include multiple processors, such as the processor 901 and the processor 905 in FIG. 9. Each of these processors may be a single-core (single-CPU) processor or a multi-core (multi-CPU) processor.
  • the processor here may refer to one or more devices, circuits, and/or processing cores for processing data (e.g., computer program instructions).
  • the chip When the device shown in FIG. 9 is a chip, for example, a chip of the first UE, the chip includes a processor 901 (may also include a processor 905), a communication line 902 and a communication interface 904, and optionally, the chip may include a memory 903.
  • the communication interface 904 may be an input interface, a pin or a circuit, etc.
  • the memory 903 may be a register, a cache, etc.
  • the processor 901 and the processor 905 may be a general-purpose CPU, a microprocessor, an ASIC, or one or more integrated circuits for controlling the execution of the program of the communication method of any of the above embodiments.
  • the embodiment of the present application may divide the functional modules of the device according to the above method example.
  • each functional module may be divided corresponding to each function, or two or more functions may be integrated into one processing module.
  • the above integrated module may be implemented in the form of hardware or in the form of software functional modules.
  • the division of modules in the embodiment of the present application is schematic and is only a logical function division. There may be other division methods in actual implementation.
  • Figure 10 is a schematic diagram of a device, and the device 1000 may be the first UE involved in the above-mentioned various method embodiments, or a chip in the first UE.
  • the device 1000 includes a sending unit 1001, a processing unit 1002, and a receiving unit 1003.
  • the device 1000 can be used to implement the steps performed by the first UE in the communication method of the embodiment of the present application, and the relevant features can refer to any one of the embodiments shown in Figures 4, 5, 6 or 8 above, and will not be repeated here.
  • the functions/implementation processes of the sending unit 1001, the receiving unit 1003, and the processing unit 1002 in FIG10 may be implemented by the processor 901 in FIG9 calling a computer-executable instruction stored in the memory 903.
  • the functions/implementation processes of the processing unit 1002 in FIG10 may be implemented by the processor 901 in FIG9 calling a computer-executable instruction stored in the memory 903, and the functions/implementation processes of the sending unit 1001 and the receiving unit 1003 in FIG10 may be implemented by the communication interface 904 in FIG9.
  • the functions/implementation processes of the sending unit 1001 and the receiving unit 1003 can also be implemented through pins or circuits.
  • the present application also provides a computer-readable storage medium, which stores a computer program or instruction.
  • the computer program or instruction When the computer program or instruction is executed, the method performed by the first UE in the aforementioned method embodiment is implemented.
  • the functions described in the above embodiments can be implemented in the form of software functional units and sold or used as independent products.
  • the technical solution of the present application can be essentially or in other words, the part that contributes or the part of the technical solution can be embodied in the form of a software product, which 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 method described in each embodiment of the present application.
  • Storage media include: various media that can store program codes, such as USB flash drives, mobile hard drives, ROM, RAM, magnetic disks, or optical disks.
  • the present application also provides a computer program product, which includes: a computer program code, when the computer program code is run on a computer, the computer executes the method executed by the first UE in any of the aforementioned method embodiments.
  • the present application also provides a chip system, including: a processor, which can be used to execute the method executed by the first UE in the above method embodiment. The operation of the line.
  • the embodiment of the present application further provides a communication system, including the first UE in the above method embodiment.
  • the communication system may also include the second UE and/or access network device in the above method embodiment.
  • the computer program product includes one or more computer instructions.
  • the computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device.
  • the computer instructions may be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium.
  • the computer instructions may be transmitted from one website site, computer, server or data center to another 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.) means.
  • the computer-readable storage medium may be any available medium that a computer can access or a data storage device such as a server or data center that includes one or more available media integrated.
  • the available medium may be a magnetic medium (e.g., a floppy disk, a hard disk, a tape), an optical medium (e.g., a DVD), or a semiconductor medium (e.g., a solid state drive (SSD)), etc.
  • the various illustrative logic units and circuits described in the embodiments of the present application can be implemented or operated by 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 gate or transistor logic, discrete hardware components, or any combination of the above.
  • the general-purpose processor can be a microprocessor, and optionally, the general-purpose processor can also be any conventional processor, controller, microcontroller or state machine.
  • the processor can also be implemented by a combination of computing devices, such as a digital signal processor and a microprocessor, multiple microprocessors, one or more microprocessors combined with a digital signal processor core, or any other similar configuration.
  • the steps of the method or algorithm described in the embodiments of the present application can be directly embedded in hardware, a software unit executed by a processor, or a combination of the two.
  • the software unit can be stored in RAM, flash memory, ROM, erasable programmable read-only memory (EPROM), EEPROM, register, hard disk, removable disk, CD-ROM or any other form of storage medium in the art.
  • the storage medium can be connected to the processor so that the processor can read information from the storage medium and can write information to the storage medium.
  • the storage medium can also be integrated into the processor.
  • the processor and the storage medium can be arranged in an ASIC, and the ASIC can be arranged in a terminal device.
  • the processor and the storage medium can also be arranged in different components in the terminal device.
  • These computer program instructions may also be loaded onto a computer or other programmable data processing device so that a series of operational steps are executed on the computer or other programmable device to produce a computer-implemented process, whereby the instructions executed on the computer or other programmable device provide steps for implementing the functions specified in one or more processes in the flowchart and/or one or more boxes in the block diagram.
  • the first UE may perform some or all of the steps in the embodiment of the present application, and these steps or operations are only examples. In the embodiment of the present application, other operations or variations of various operations may also be performed. In addition, the various steps may be performed in different orders presented in the embodiment of the present application, and it is possible that not all operations in the embodiment of the present application need to be performed.

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Abstract

本申请涉及一种通信方法、装置及系统。第一终端设备根据载波信息确定至少一个侧行控制元素，该载波信息包括至少一个侧行控制元素对应的载波的信息。第一终端设备根据至少一个侧行控制元素确定第一目的地址，再根据第一目的地址确定第一逻辑信道和/或第一侧行控制元素。本申请实施例通过载波信息从待发送的侧行控制元素中筛选出了部分侧行控制元素，筛选出的侧行控制元素可参与SLLCP过程，例如参与确定第一目的地址，而未筛选出的侧行控制元素可不参与确定第一目的地址。由于该筛选过程，使得最终确定的第一侧行控制元素较大概率是根据载波信息确定的侧行控制元素，则接收端能够确定第一侧行控制元素对应的载波，提高了侧行通信质量。

Description

一种通信方法、装置及系统
相关申请的交叉引用
本申请要求在2022年09月29日提交中国国家知识产权局、申请号为202211205060.8、申请名称为“一种通信方法、装置及系统”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、装置及系统。
背景技术
在侧行链路(sidelink，SL)通信中，一个用户设备(user equipment，UE)可以向另一个UE发送SL介质接入控制(media access control，MAC)控制元素(control element，CE)。现在的一些SL MAC CE所包括的信息是针对某个载波的，这是因为当前在SL场景下仅支持单载波通信。当考虑在SL场景下采用多载波通信时，如果还是按照目前的方式，则接收端UE接收到SL MAC CE后，无法确定该SL MAC CE包括的信息究竟针对哪个载波，会影响SL MAC CE的功能实现，从而可能导致信息指示错误，降低SL通信质量。
发明内容
本申请实施例提供一种通信方法、装置及系统，用于提高SL通信质量。
第一方面，提供第一种通信方法，该方法可由终端设备执行，或由包括终端设备功能的其他设备执行，或由芯片系统(或，芯片)或其他功能模块执行，该芯片系统或功能模块能够实现终端设备的功能，该芯片系统或功能模块例如设置在终端设备中。该终端设备例如为第一终端设备。该方法包括：根据载波信息确定至少一个侧行控制元素，该载波信息包括该至少一个侧行控制元素对应的载波的信息，该至少一个侧行控制元素中的一个或多个侧行控制元素为介质接入控制控制元素；根据该至少一个侧行控制元素确定第一目的地址；根据第一目的地址确定第一逻辑信道和/或第一侧行控制元素。
第一终端设备在执行侧行新传之前，可以执行SL逻辑信道优先级(logical channel prioritization，LCP)过程，以确定将用于执行侧行新传的资源分配给哪些待发送的信息。本申请实施例中，第一终端设备可以根据载波信息确定至少一个侧行控制元素，从而至少一个侧行控制元素能够参与SL LCP过程，相当于本申请实施例通过载波信息从待发送的侧行控制元素中筛选出了至少一个侧行控制元素，筛选出的至少一个侧行控制元素可以参与SL LCP过程，例如参与确定第一目的地址，而未筛选出的侧行控制元素可以不参与确定第一目的地址，从而根据第一目的地址所确定的第一侧行控制元素在较大概率上也属于至少一个侧行控制元素，或者说也是根据载波信息确定的。如果第一侧行控制元素也是根据载波信息确定的，则接收端接收第一侧行控制元素后，就能够确定第一侧行控制元素包括的信息所对应的载波，从而减小了指示错误的概率，提高了侧行通信质量。
在一种可选的实施方式中，第一侧行控制元素属于该至少一个侧行控制元素。例如通过SL LCP过程所确定的第一侧行控制元素可以是根据至少一个侧行控制元素中的一个。由于第一侧行控制元素是根据载波信息确定的，因此接收端接收第一侧行控制元素后，就能够确定第一侧行控制元素包括的信息所对应的载波，从而减小指示错误的概率，提高侧行通信质量。
在一种可选的实施方式中，根据载波信息确定至少一个侧行控制元素，包括：根据该载波信息以及第一侧行资源确定该至少一个侧行控制元素，第一侧行资源为用于侧行传输的资源。第一终端设备可以根据载波信息以及第一侧行资源确定至少一个侧行控制元素，使得至少一个侧行控制元素与第一侧行资源有关联，从而接收端可以根据接收侧行控制元素的侧行资源确定该侧行控制元素对应的载波。
在一种可选的实施方式中，根据该载波信息以及第一侧行资源确定该至少一个侧行控制元素，包括：确定第一侧行资源所在的载波包括该至少一个侧行控制元素对应的载波；和/或，确定该至少一个侧行控制元素对应的载波与第一侧行资源所在的载波为同一载波。例如第一侧行资源所在的载波包括至少一个侧行控制元素对应的载波，或至少一个侧行控制元素对应的载波与第一侧行资源所在的载波为同一载波，那么接收端接收一个侧行控制元素后，根据接收该侧行控制元素的载波就能够确定该侧行控制元素 所对应的载波，从而减小了指示错误的概率，提高了侧行通信质量。
在一种可选的实施方式中，该至少一个侧行控制元素中包括第二侧行控制元素，其中，第二侧行控制元素对应的载波为用于传输SCI的载波；或，第二侧行控制元素对应的载波为SCI调度的SL传输所在的载波；其中，该SCI用于指示第一终端设备发送侧行CSI报告，该侧行CSI报告包括在第二侧行控制元素中。例如，在同载波调度的情况下，传输SCI的载波也就是传输第二侧行控制元素的载波。因此对于同载波调度的情况，第二侧行控制元素对应的载波可以是用于传输SCI的载波，或者也可以是该SCI调度的SL传输所在的载波。该SCI调度的SL传输所在的载波，也就是第二侧行控制元素所在的载波。其中，该SCI调度的SL传输，例如为SL CSI报告。又例如，在跨载波调度的情况下，传输SCI的载波不一定是传输第二侧行控制元素的载波。因此对于跨载波调度的情况，第二侧行控制元素对应的载波可以是该SCI调度的SL传输所在的载波。
在一种可选的实施方式中，该至少一个侧行控制元素中包括第二侧行控制元素，其中，第二侧行控制元素对应的载波为辅助信息关联的资源池所在的载波；或，第二侧行控制元素对应的载波为辅助信息指示的侧行资源所在的资源池所在的载波；或，第二侧行控制元素对应的载波为用于传输辅助信息的载波；其中，该辅助信息包括在第二侧行控制元素中。可选的，该辅助信息可用于协助该辅助信息的接收端(例如第二终端设备)选择SL资源，该辅助信息例如为用户设备间协作信息(inter-UE coordination Information，IUC information)，或者也可以是其他信息。例如，如果第一终端设备是基于来自第二终端设备的IUC请求而向第二终端设备发送该IUC信息，那么该IUC信息关联的资源池例如为用于发送该IUC请求的侧行资源所在的发送资源池，例如称为资源池A。在这种情况下，IUC信息指示的侧行资源所在的资源池与该资源池A可以是同一资源池，因此，该IUC信息关联的资源池所在的载波与该IUC信息指示的侧行资源所在的资源池所在的载波，可以是同一载波；而用于传输该IUC信息的侧行资源也可以是该资源池A内的资源，因此，用于传输该IUC信息的载波与该发送资源池所在的载波也可以是同一载波。又例如，第二终端设备并未向第一终端设备发送IUC请求，而是第一终端设备根据其他条件的触发向第二终端设备发送该IUC信息。那么，该IUC信息关联的资源池例如为预先配置的，例如称为资源池B。在这种情况下，IUC信息指示的侧行资源所在的资源池与该资源池B可以是同一资源池；而用于传输该IUC信息的侧行资源也可以是该资源池B内的资源，因此，用于传输该IUC信息的载波与该资源池B所在的载波也可以是同一载波。
在一种可选的实施方式中，该至少一个侧行控制元素中包括第二侧行控制元素，其中，第二侧行控制元素对应的载波为辅助请求关联的资源池所在的载波；或，第二侧行控制元素对应的载波为辅助请求指示的侧行资源所在的资源池所在的载波；或，第二侧行控制元素对应的载波为用于传输辅助请求的载波；其中，该辅助请求包括在第二侧行控制元素中，该辅助请求用于请求第二侧行控制元素的接收端发送辅助信息。可选的，该辅助请求例如为IUC请求，该IUC请求可用于请求第二侧行控制元素的接收端发送IUC信息。例如，第一终端设备可以向其他终端设备(例如第二终端设备)发送IUC请求，以请求获得IUC信息。该IUC请求关联的资源池例如为用于发送该IUC请求的侧行资源所在的发送资源池，例如称为资源池C。该IUC请求除了可以请求获得IUC信息外，还可以指示相应的侧行资源，该IUC请求所指示的侧行资源例如也包括在资源池C中，因此，该IUC请求关联的资源池所在的载波与该IUC请求指示的侧行资源所在的资源池所在的载波可以是同一载波。另外，用于传输该IUC请求的侧行资源也可以是资源池C内的侧行资源，因此该IUC请求关联的资源池所在的载波与用于传输该IUC请求的载波也可以是同一载波。
在一种可选的实施方式中，根据该至少一个侧行控制元素确定第一目的地址，包括：根据该至少一个侧行控制元素的优先级确定第一目的地址。可选的，根据该至少一个侧行控制元素的优先级确定第一目的地址，包括：根据该至少一个侧行控制元素的优先级以及待发送的逻辑信道的优先级确定第一目的地址。例如，第一终端设备可以确定至少一个侧行控制元素以及待发送的逻辑信道中优先级最高的侧行控制元素和/或逻辑信道关联的目的地址为第一目的地址。
在一种可选的实施方式中，该方法还包括：将第一侧行资源分配给第一逻辑信道和/或第一侧行控制元素，第一侧行资源为用于侧行传输的资源；发送第一逻辑信道和/或所述第一侧行控制元素。第一侧行资源是本次用于侧行传输的资源，因此第一终端设备可将第一侧行资源分配给第一逻辑信道和/或第一侧行控制元素，以传输第一逻辑信道和/或第一侧行控制元素。
在一种可选的实施方式中，该方法还包括：执行载波重选或载波选择，以重新确定载波。还有一种 可能，第一终端设备根据载波信息无法确定至少一个侧行控制元素。例如，第一侧行资源所在的载波不包括待发送的任意侧行控制元素对应的载波，以及，待发送的侧行控制元素对应的载波与第一侧行资源所在的载波不是同一载波，则第一终端设备无法确定至少一个侧行控制元素。在这种情况下，可选的，第一终端设备可以执行载波重选或载波选择，以重新确定载波。在重新确定载波后，第一终端设备可以获得该载波上的侧行资源用于侧行传输。由于重新确定了载波，从而第一终端设备就有可能根据载波信息确定侧行控制元素，使得本申请实施例的方案得以执行。
在一种可选的实施方式中，该重新确定的载波包括该至少一个侧行控制元素对应的载波。例如，第一终端设备重新确定的载波可包括至少一个侧行控制元素对应的载波。这样可以使得第一终端设备根据载波信息以及重新确定的载波上的侧行资源能够确定出侧行控制元素，使得本申请实施例的方法得以执行。
在一种可选的实施方式中，该载波重选或选择过程在第一时长内完成，第一时长为第一计时器对应的时长，第一计时器用于指示一个侧行控制元素的有效期。载波重选或载波选择过程可以在一个侧行控制元素的有效期内完成，以减小信息传输时延。
在一种可选的实施方式中，该载波重选或选择过程在第二时长完成，第二时长为第二计时器对应的时长，第二计时器对应的时长大于第一计时器对应的时长，第一计时器用于指示一个侧行控制元素的有效期。考虑到载波重选或载波选择过程所需的时间可能较长，如果用第一计时器来计时，很可能第一终端设备无法在第一计时器对应的时长内完成载波重选或载波选择，因此第一终端设备可以维护第二计时器(第二终端设备也可以维护第二计时器)，以使得第一终端设备尽量有较为充足的时间进行载波重选或载波选择，也能减小侧行控制元素失效的概率(例如，在第二计时器的运行期间，侧行控制元素有效)。
在一种可选的实施方式中，该方法还包括：根据该载波信息确定第一侧行控制元素的格式为第一格式，在第一格式下，第一侧行控制元素不包括第一侧行控制元素对应的资源的信息。由于接收端根据承载第一侧行控制元素的载波就能确定第一侧行控制元素对应的载波，而不必在第一侧行控制元素中添加额外的指示，因此第一侧行控制元素可以采用第一格式，与已有技术能够更好地兼容，且简化第一侧行控制元素的实现。
第二方面，提供第二种通信方法，该方法可由终端设备执行，或由包括终端设备功能的其他设备执行，或由芯片系统(或，芯片)或其他功能模块执行，该芯片系统或功能模块能够实现终端设备的功能，该芯片系统或功能模块例如设置在终端设备中。该终端设备例如为第一终端设备。该方法包括：根据待发送的逻辑信道和/或侧行控制元素确定第一目的地址；根据载波信息从第一目的地址关联的侧行控制元素中确定第一侧行控制元素，其中，该载波信息包括第一侧行控制元素对应的载波信息，第一侧行控制元素为介质接入控制控制元素。本申请实施例中，第一终端设备可以在SL LCP的第二个步骤中根据载波信息确定第一侧行控制元素，例如第一终端设备向第二终端设备发送了第一侧行控制元素，第二终端设备在接收第一侧行控制元素后，能够确定第一侧行控制元素对应的载波，或者，确定第一侧行控制元素包括的信息对应的载波。从而即使在多载波的SL场景下，接收端也能够确定所接收的侧行控制元素对应的载波，减小了侧行控制元素对于载波指示错误的概率，提高了侧行通信质量。
在一种可选的实施方式中，根据载波信息从第一目的地址关联的侧行控制元素中确定第一侧行控制元素，包括：根据该载波信息以及第一侧行资源，从第一目的地址关联的侧行控制元素中确定第一侧行控制元素。
在一种可选的实施方式中，根据该载波信息以及第一侧行资源，从第一目的地址关联的侧行控制元素中确定第一侧行控制元素，包括：确定第一侧行资源所在的载波包括第一侧行控制元素对应的载波；和/或，确定第一侧行控制元素对应的载波与第一侧行资源所在的载波为同一载波。
在一种可选的实施方式中，第一侧行控制元素对应的载波为用于传输SCI的载波；或，第一侧行控制元素对应的载波为SCI调度的SL传输所在的载波；其中，该SCI用于指示第一终端设备发送侧行CSI报告，该侧行CSI报告包括在第一侧行控制元素中。
在一种可选的实施方式中，第一侧行控制元素对应的载波为辅助信息关联的资源池所在的载波；或，第一侧行控制元素对应的载波为辅助信息指示的侧行资源所在的资源池所在的载波；或，第一侧行控制元素对应的载波为用于传输辅助信息的载波；其中，该辅助信息包括在第一侧行控制元素中。可选的，该辅助信息可用于协助该辅助信息的接收端(例如第二终端设备)选择SL资源，该辅助信息例如为IUC信息，或者也可以是其他信息。
在一种可选的实施方式中，第一侧行控制元素对应的载波为辅助请求关联的资源池所在的载波；或，第一侧行控制元素对应的载波为辅助请求指示的侧行资源所在的资源池所在的载波；或，第一侧行控制元素对应的载波为用于传输辅助请求的载波；其中，该辅助请求包括在第一侧行控制元素中，该辅助请求用于请求所述第一侧行控制元素的接收端发送辅助信息。可选的，该辅助请求例如为IUC请求，该IUC请求可用于请求第二侧行控制元素的接收端发送IUC信息。
在一种可选的实施方式中，根据待发送的逻辑信道和/或侧行控制元素确定第一目的地址，包括：根据待发送的逻辑信道和/或侧行控制元素的优先级确定第一目的地址。
在一种可选的实施方式中，该方法还包括：将第一侧行资源分配给第一侧行控制元素，第一侧行资源为用于侧行传输的资源；发送第一侧行控制元素。
在一种可选的实施方式中，所述方法还包括：执行载波重选或载波选择，以重新确定载波。
在一种可选的实施方式中，该重新确定的载波包括第一侧行控制元素对应的载波。
在一种可选的实施方式中，该载波重选或选择过程在第一时长内完成，第一时长为第一计时器对应的时长，第一计时器用于指示第一侧行控制元素的有效期。
在一种可选的实施方式中，该载波重选或选择过程在第二时长完成，第二时长为第二计时器对应的时长，第二计时器对应的时长大于第一计时器对应的时长，第一计时器用于指示第一侧行控制元素的有效期。
在一种可选的实施方式中，该方法还包括：根据该载波信息确定第一侧行控制元素的格式为第一格式，在第一格式下，第一侧行控制元素不包括第一侧行控制元素对应的资源的信息。
关于第二方面的各种可选的实施方式所带来的技术效果，可参考对于第一方面的相应实施方式的技术效果的介绍。
第三方面，提供第三种通信方法，该方法可由终端设备执行，或由包括终端设备功能的其他设备执行，或由芯片系统(或，芯片)或其他功能模块执行，该芯片系统或功能模块能够实现终端设备的功能，该芯片系统或功能模块例如设置在终端设备中。该终端设备例如为第一终端设备。该方法包括：确定侧行控制元素，该侧行控制元素包括第一信息，以及该侧行控制元素还包括该侧行控制元素对应的资源的信息。本申请实施例中，第二终端设备根据该侧行控制元素所包括的该侧行控制元素对应的资源的信息，就能确定该侧行控制元素对应的资源，降低了错误指示的概率，提高了侧行传输质量。而且也解除了侧行控制元素的传输与载波之间的约束关系，例如与载波1对应的侧行控制元素可以在载波1上传输，也可以在其他载波上传输，使得侧行控制元素的传输更为灵活。
在一种可选的实施方式中，该方法还包括：通过第一侧行资源发送该侧行控制元素。例如，如果第一侧行资源足够用于发送该侧行控制元素(或，足够用于发送该侧行控制元素以及该侧行控制元素的子头(subheader))，则第一终端设备可以通过第一侧行资源发送该侧行控制元素，否则，第一终端设备可能无法发送该侧行控制元素。
在一种可选的实施方式中，该侧行控制元素对应的资源为载波或资源池。
在一种可选的实施方式中，第一信息为侧行CSI报告、辅助信息或辅助请求。可选的，该辅助请求例如为IUC请求，该辅助信息例如为IUC信息。
在一种可选的实施方式中，该侧行控制元素对应的载波为用于传输SCI的载波；或，该侧行控制元素对应的载波为SCI调度的侧行资源所在的载波。其中，该SCI用于指示第一终端设备发送侧行CSI报告，第一信息为该侧行CSI报告，该侧行控制元素对应的资源为载波。
在一种可选的实施方式中，该侧行控制元素对应的载波为辅助信息关联的资源池所在的载波；或，该侧行控制元素对应的载波为辅助信息指示的侧行资源所在的资源池所在的载波；或，该侧行控制元素对应的载波为用于传输辅助信息的载波；其中，第一信息为该辅助信息，该侧行控制元素对应的资源为载波。可选的，该辅助信息可用于协助该辅助信息的接收端(例如第二终端设备)选择SL资源，该辅助信息例如为IUC信息，或者也可以是其他信息。
在一种可选的实施方式中，该侧行控制元素对应的资源池为辅助信息关联的资源池；或，该侧行控制元素对应的资源池为辅助信息指示的侧行资源所在的资源池；或，该侧行控制元素对应的资源池为用于传输辅助信息的资源池；其中，第一信息为该辅助信息，该侧行控制元素对应的资源为资源池。关于该辅助信息的介绍可参考上文。
在一种可选的实施方式中，该侧行控制元素对应的载波为辅助请求关联的资源池所在的载波；或， 该侧行控制元素对应的载波为辅助请求指示的侧行资源所在的资源池所在的载波；或，该侧行控制元素对应的载波为用于传输辅助请求的载波；其中，第一信息为该辅助请求，该侧行控制元素对应的资源为载波。关于该辅助请求的介绍可参考上文。
在一种可选的实施方式中，该侧行控制元素对应的资源池为辅助请求关联的资源池；或，该侧行控制元素对应的资源池为辅助请求指示的侧行资源所在的资源池；或，该侧行控制元素对应的资源池为用于传输辅助请求的资源池；其中，第一信息为该辅助请求，该侧行控制元素对应的资源为资源池。关于该辅助请求的介绍可参考上文。
在一种可选的实施方式中，该侧行控制元素还包括该侧行控制元素对应的资源的信息，包括：该侧行控制元素包括该侧行控制元素对应的资源的索引；或，该侧行控制元素包括比特地图，该比特地图所包括的比特与该侧行控制元素对应的资源相对应。侧行控制元素可以包括相应资源的索引，使得指示较为明确。或者，侧行控制元素也可以通过比特地图来指示该侧行控制元素对应的资源，由此能够减小侧行控制元素的信息量，从而减小传输开销。
在一种可选的实施方式中，该方法还包括：根据载波信息确定该侧行控制元素的格式为第二格式，在第二格式下，该侧行控制元素包括该侧行控制元素对应的资源的信息。用于传输该侧行控制元素的资源(例如载波)，不一定是该侧行控制元素对应的资源，因此接收端需要额外的指示来确定该侧行控制元素对应的资源。则本申请实施例中，侧行控制元素可以采用第二格式，在侧行控制元素中可以包括该侧行控制元素对应的资源，使得接收端能够明确该侧行控制元素对应的资源，减小错误指示的概率。
在一种可选的实施方式中，该载波信息包括该侧行控制元素对应的载波的信息，和/或，包括该侧行控制元素的发送端与接收端之间用于通信的载波的数量。
在一种可选的实施方式中，根据载波信息确定侧行控制元素的格式，包括方式a、方式b或方式c。其中方式a为，如果第一侧行资源所在的载波包括该侧行控制元素对应的载波，确定该侧行控制元素的格式为第一格式，否则确定该侧行控制元素的格式为第二格式；方式b为，如果该侧行控制元素对应的载波与第一侧行资源所在的载波为同一载波，确定该侧行控制元素的格式为第一格式，否则确定该侧行控制元素的格式为第二格式；方式c为，如果该侧行控制元素的发送端与接收端之间用于通信的载波的数量为1，确定该侧行控制元素的格式为第一格式，否则确定该侧行控制元素的格式为第二格式。这里给出了三种确定格式的方式，可选的，如果采用方式c确定的方式，那么，如果发送端与接收端之间的载波数量大于1，则可以直接确定侧行控制元素的格式为第二格式，或者，也可以采用方式a或方式b中的任一种方式来确定侧行控制元素的格式。
关于第三方面的各种可选的实施方式所带来的技术效果，可参考对于第一方面的相应实施方式的技术效果的介绍。
第四方面，提供第四种通信方法，该方法可由终端设备执行，或由包括终端设备功能的其他设备执行，或由芯片系统(或，芯片)或其他功能模块执行，该芯片系统或功能模块能够实现终端设备的功能，该芯片系统或功能模块例如设置在终端设备中。该终端设备例如为第一终端设备。该方法包括：根据载波信息确定侧行控制元素的格式为第一格式或第二格式；通过第一侧行资源发送该侧行控制元素；其中，当该侧行控制元素的格式为第二格式时，该侧行控制元素包括该侧行控制元素对应的资源的信息。本申请实施例中，第一终端设备可以根据相应的方式确定侧行控制元素的格式，使得侧行控制元素能够采用更为合适的格式。可选的，第二终端设备也可以采用与第一终端设备相同的方式确定侧行控制元素的格式，因此第一终端设备与第二终端设备对于侧行控制元素的格式可以有相同的理解，减少了指示错误的概率。
在一种可选的实施方式中，当该侧行控制元素的格式为第一格式时，该侧行控制元素不包括该侧行控制元素对应的资源的信息。如果侧行控制元素的格式为第一格式，可以简化侧行控制元素的实现，也能够更好地与已有技术兼容。
在一种可选的实施方式中，该载波信息包括该侧行控制元素对应的载波的信息，和/或，包括该侧行控制元素的发送端与接收端之间用于通信的载波的数量。
在一种可选的实施方式中，根据载波信息确定侧行控制元素的格式，包括：如果第一侧行资源所在的载波包括该侧行控制元素对应的载波，确定该侧行控制元素的格式为第一格式，否则确定该侧行控制元素的格式为第二格式；或，如果该侧行控制元素对应的载波与第一侧行资源所在的载波为同一载波，确定该侧行控制元素的格式为第一格式，否则确定该侧行控制元素的格式为第二格式；或，如果该侧行 控制元素的发送端与接收端之间用于通信的载波的数量为1，确定该侧行控制元素的格式为第一格式，否则确定该侧行控制元素的格式为第二格式。
在一种可选的实施方式中，该侧行控制元素对应的载波为用于传输SCI的载波；或，该侧行控制元素对应的载波为SCI调度的侧行资源所在的载波；其中，该SCI用于请求该侧行控制元素的发送端发送侧行CSI报告，该侧行CSI报告包括在该侧行控制元素中。
在一种可选的实施方式中，该侧行控制元素对应的载波为辅助信息关联的资源池所在的载波；或，该侧行控制元素对应的载波为辅助信息指示的侧行资源所在的资源池所在的载波；或，该侧行控制元素对应的载波为用于传输辅助信息的载波；其中，该辅助信息包括在该侧行控制元素中。可选的，该辅助信息可用于协助该辅助信息的接收端(例如第二终端设备)选择SL资源，例如该辅助信息为IUC信息，或者也可以是其他信息。
在一种可选的实施方式中，该侧行控制元素对应的载波为辅助请求关联的资源池所在的载波；或，该侧行控制元素对应的载波为辅助请求指示的侧行资源所在的资源池所在的载波；或，该侧行控制元素对应的载波为用于传输辅助请求的载波；其中，该辅助请求包括在该侧行控制元素中，该辅助请求用于请求该侧行控制元素的接收端发送辅助信息，该辅助信息可用于协助第一终端设备选择SL资源。可选的，该辅助请求例如为IUC请求，该辅助信息例如为IUC信息。
在一种可选的实施方式中，该侧行控制元素对应的资源为载波或资源池。
关于第四方面的一些可选的实施方式所带来的技术效果，可参考对于第一方面的相应实施方式的技术效果的介绍，和/或，参考对于第三方面的相应实施方式的技术效果的介绍。
第五方面，提供一种通信装置。所述通信装置可以为上述第一方面至第四方面中的任一方面所述的第一终端设备。所述通信装置具备上述第一终端设备的功能。所述通信装置例如为第一终端设备，或为包括第一终端设备的较大设备，或为第一终端设备中的功能模块，例如基带装置或芯片系统等。一种可选的实现方式中，所述通信装置包括基带装置和射频装置。另一种可选的实现方式中，所述通信装置包括处理单元(有时也称为处理模块)和收发单元(有时也称为收发模块)。收发单元能够实现发送功能和接收功能，在收发单元实现发送功能时，可称为发送单元(有时也称为发送模块)，在收发单元实现接收功能时，可称为接收单元(有时也称为接收模块)。发送单元和接收单元可以是同一个功能模块，该功能模块称为收发单元，该功能模块能实现发送功能和接收功能；或者，发送单元和接收单元可以是不同的功能模块，收发单元是对这些功能模块的统称。
在一种可选的实施方式中，该处理单元，用于根据载波信息确定至少一个侧行控制元素，该载波信息包括该至少一个侧行控制元素对应的载波的信息，该至少一个侧行控制元素中的每个侧行控制元素为介质接入控制控制元素；该处理单元，还用于根据该至少一个侧行控制元素确定第一目的地址；该处理单元，还用于根据第一目的地址确定第一逻辑信道和/或第一侧行控制元素。
在一种可选的实施方式中，该处理单元，用于根据待发送的逻辑信道和/或侧行控制元素确定第一目的地址；该处理单元，还用于根据载波信息从第一目的地址关联的侧行控制元素中确定第一侧行控制元素，其中，该载波信息包括第一侧行控制元素对应的载波信息，第一侧行控制元素为介质接入控制控制元素。
在一种可选的实施方式中，该处理单元，用于确定侧行控制元素，该侧行控制元素包括第一信息，以及该侧行控制元素还包括该侧行控制元素对应的资源的信息；该收发单元(或，该发送单元)，用于通过第一侧行资源发送该侧行控制元素。
在一种可选的实施方式中，该处理单元，用于根据载波信息确定侧行控制元素的格式为第一格式或第二格式；该收发单元(或，该发送单元)，用于通过第一侧行资源发送该侧行控制元素；其中，当该侧行控制元素的格式为第二格式时，该侧行控制元素包括该侧行控制元素对应的资源的信息。
在一种可选的实施方式中，所述通信装置还包括存储单元(有时也称为存储模块)，所述处理单元用于与所述存储单元耦合，并执行所述存储单元中的程序或指令，使能所述通信装置执行上述第一方面至第四方面中的任一方面所述的第一终端设备的功能。
第六方面，提供一种通信装置，该通信装置可以为第一终端设备，或者为设置在第一终端设备中的芯片或芯片系统。该通信装置包括通信接口以及处理器，可选的，还包括存储器。其中，该存储器用于存储计算机程序，处理器与存储器、通信接口耦合，当处理器读取所述计算机程序或指令时，使通信装置执行上述各方面中由第一终端设备所执行的方法。
第七方面，提供一种通信系统，包括第一终端设备，其中，第一终端设备用于执行如第一方面至第四方面中任一方面所述的由第一终端设备执行的方法。
第八方面，提供一种计算机可读存储介质，所述计算机可读存储介质用于存储计算机程序或指令，当其被运行时，使得上述各方面中第一终端设备所执行的方法被实现。
第九方面，提供一种包含指令的计算机程序产品，当其在计算机上运行时，使得上述各方面所述的方法被实现。
第十方面，提供一种芯片系统，包括处理器和接口，所述处理器用于从所述接口调用并运行指令，以使所述芯片系统实现上述各方面的方法。
附图说明
图1为SL CSI报告的上报过程流程图；
图2为IUC机制的流程图；
图3为本申请实施例应用的一种网络架构的示意图；
图4为本申请实施例提供的第一种通信方法的流程图；
图5为本申请实施例提供的第二种通信方法的流程图；
图6为本申请实施例提供的第三种通信方法的流程图；
图7A和图7B为本申请实施例中SL MAC CE的两种格式示意图；
图8为本申请实施例提供的第四种通信方法的流程图；
图9为本申请实施例提供的一种装置的示意图；
图10为本申请实施例提供的又一种装置的示意图。
具体实施方式
为了使本申请实施例的目的、技术方案和优点更加清楚，下面将结合附图对本申请实施例作进一步地详细描述。
本申请实施例中，对于名词的数目，除非特别说明，表示“单数名词或复数名词”，即"一个或多个”。“至少一个”是指一个或者多个，“多个”是指两个或两个以上。“和/或”，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的情况，其中A,B可以是单数或者复数。字符“/”一般表示前后关联对象是一种“或”的关系。例如，A/B，表示：A或B。“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)，表示：a,b,c,a和b,a和c,b和c,或a和b和c，其中a,b,c可以是单个，也可以是多个。
本申请实施例提及“第一”、“第二”等序数词是用于对多个对象进行区分，不用于限定多个对象的大小、内容、顺序、时序、优先级或者重要程度等。另外，本申请所介绍的各个实施例中对于步骤的编号，只是为了区分不同的步骤，并不用于限定步骤之间的先后顺序。例如，S401可以发生在S402之前，或者可能发生在S402之后，或者也可能与S402同时发生。
以下，对本申请实施例中的部分用语或概念进行解释说明，以便于本领域技术人员理解。
本申请实施例中，终端设备是一种具有无线收发功能的设备，可以是固定设备，移动设备、手持设备(例如手机)、穿戴设备、车载设备，或内置于上述设备中的无线装置(例如，通信模块，调制解调器，或芯片系统等)。所述终端设备用于连接人，物，机器等，可广泛用于各种场景，例如包括但不限于以下场景：蜂窝通信、设备到设备通信(device-to-device，D2D)、V2X、机器到机器/机器类通信(machine-to-machine/machine-type communications，M2M/MTC)、物联网(internet of things，IoT)、虚拟现实(virtual reality，VR)、增强现实(augmented reality，AR)、工业控制(industrial control)、无人驾驶(self driving)、远程医疗(remote medical)、智能电网(smart grid)、智能家具、智能办公、智能穿戴、智能交通，智慧城市(smart city)、无人机、机器人等场景的终端设备。所述终端设备有时可称为UE、终端、接入站、UE站、远方站、无线通信设备、或用户装置等等。为描述方便，本申请实施例中将终端设备以UE为例进行说明。
本申请实施例中的网络设备，例如包括接入网设备，和/或核心网设备。所述接入网设备为具有无线收发功能的设备，用于与所述终端设备进行通信。所述接入网设备包括但不限于基站(基站收发站点 (base transceiver station，BTS)，Node B,eNodeB/eNB，或gNodeB/gNB)、收发点(transmission reception point，TRP)，第三代合作伙伴计划(3rd generation partnership project，3GPP)后续演进的基站，无线保真(wireless fidelity，Wi-Fi)系统中的接入节点，无线中继节点，无线回传节点等。所述基站可以是：宏基站，微基站，微微基站，小站，中继站等。多个基站可以支持同一种接入技术的网络，也可以支持不同接入技术的网络。基站可以包含一个或多个共站或非共站的传输接收点。所述接入网设备还可以是云无线接入网络(cloud radio access network，CRAN)场景下的无线控制器、集中单元(centralized unit，CU)，和/或分布单元(distributed unit，DU)。所述接入网设备还可以是服务器等。例如，车到一切(vehicle to everything，V2X)技术中的网络设备可以为路侧单元(road side unit，RSU)。以下对接入网设备以基站为例进行说明。基站可以与终端设备进行通信，也可以通过中继站与终端设备进行通信。终端设备可以与不同接入技术中的多个基站进行通信。所述核心网设备用于实现移动管理，数据处理，会话管理，策略和计费等功能。不同接入技术的系统中实现核心网功能的设备名称可以不同，本申请实施例并不对此进行限定。以5G系统为例，所述核心网设备包括：访问和移动管理功能(access and mobility management function，AMF)、会话管理功能(session management function，SMF)、策略控制功能(policy control function，PCF)或用户面功能(user plane function，UPF)等。
本申请实施例中，用于实现网络设备功能的通信装置可以是网络设备，也可以是能够支持网络设备实现该功能的装置，例如芯片系统，该装置可以被安装在网络设备中。在本申请实施例提供的技术方案中，以用于实现网络设备的功能的装置是网络设备为例，描述本申请实施例提供的技术方案。
本申请实施例中，UE之间可以通过单载波通信，也可以通过多于一个载波通信。例如可以引入SL载波聚合(carrier aggregation，CA)技术，从而使得在SL上，UE之间可以通过多于一个载波进行通信。例如UE可使用多于一个载波发送广播或组播消息，或UE可使用多于一个载波与另一个UE进行单播通信等。不同的载波上可以发送不同的数据，从而能够增大SL上的数据速率；或者，不同的载波上也可以发送相同的数据，例如可采用重复(duplication)机制，重复的数据可以在不同的载波上传输，以提高数据传输的可靠性。其中，本申请实施例所述的载波，均可理解为SL载波。
本申请实施例提供的技术方案可以应用于第四代移动通信技术(the 4th generation，4G)系统中，例如长期演进(long term evolution，LTE)系统，或可以应用于5G系统中，例如NR系统，或者还可以应用于下一代移动通信系统或其他类似的通信系统，例如第六代移动通信技术(the 6th generation，6G)系统等，具体的不做限制。本申请实施例提供的技术方案可以应用于设备到设备(device-to-device，D2D)场景，例如NR-D2D场景等，或者可以应用于车到一切(vehicle to everything，V2X)场景，例如NR-V2X场景等。例如可应用于车联网，例如V2X等，或可用于智能驾驶、辅助驾驶、或智能网联车等领域。
SL MAC CE可以用于传输多种不同的信息，下面举例介绍。
(1)SL MAC CE包括SL信道状态信息(channel state information，CSI)报告(reporting)。
目前SL CSI报告只针对单播通信。可参考图1，为SL CSI reporting的发送过程。
S101、传输UE(transmission UE，TX UE)向接收UE(reception UE，RX UE)发送PC5-无线资源控制(radio resource control，RRC)消息。相应的，RX UE接收来自TX UE的PC5-RRC消息。
该PC5-RRC消息可用于配置CSI参考信号模型(reference signal pattern，RS pattern)。
S102、TX UE向RX UE发送侧行控制信息(sidelink control information，SCI)。相应的，RX UE接收来自TX UE的该SCI。例如TX UE可将该SCI包括的CSI请求(request)域(field)的值设置为“1”，使得该SCI用于触发SL CSI报告。
另外，TX UE还可以按照S101中配置的RX pattern向RX UE发送参考信号，例如该参考信号通过物理侧行共享信道(pysical sidelink share channel，PSSCH)发送。RX UE可根据该RS pattern测量参考信号，从而可以得到SL CSI报告。
RX UE接收该SCI后，可以触发SL CSI报告。例如RX UE维护有SL CSI报告状态位，在接收该SCI后，可将该状态位设置为触发状态。在该SL CSI报告被触发后，RX UE可以向TX UE发送SL CSI报告。
S103、RX UE向TX UE发送SL CSI reporting MAC CE。相应的，TX UE接收来自RX UE的该SL CSI reporting MAC CE。该SL CSI reporting MAC CE可包括RX UE测量得到的SL CSI报告。例如该SL CSI报告包括秩指示(rank indicator，RI)和信道质量指示(channel quality indicator，CQI)等信息。
TX UE和RX UE的MAC层都可以为每个单播连接(一对源层2标识(source L2 ID)和目的层2标识(destination L2 ID))维护一个侧行CSI报告定时器(sl-CSI-ReportTimer)。sl-CSI-ReportTimer用于发送SL CSI报告的UE(例如图1中的RX UE)满足触发SL CSI报告的UE(例如图1中的TX UE)所设置的时延需求。例如TX UE可以通过PC5RRC消息向RX UE配置该sl-CSI-ReportTimer，该PC5-RRC消息与S101中的PC5-RRC消息可以是同一条消息，或者也可以是两条消息。也就是说，RX UE需要在该sl-CSI-ReportTimer运行时间内向TX UE发送SL CSI reporting MAC CE，否则该SL CSI reporting MAC CE包括的SL CSI报告就会失效。
其中，如果RX UE的SL CSI报告被SCI触发，且没有被取消，那么，如果触发的SL CSI报告对应的sl-CSI-ReportTimer没有运行，则可以启动该sl-CSI-ReportTimer。如果触发的SL CSI报告对应的sl-CSI-ReportTimer超时，则可以取消该SL CSI报告，例如将该SL CSI报告对应的状态位设置为取消触发状态。或者，如果该sl-CSI-ReportTimer处于运行状态，且RX UE的MAC层有用于新传的SL资源可用于传输SL CSI reporting MAC CE以及该SL CSI reporting MAC CE的子头(subheader)，则RX UE可以指示复用和组装过程产生一个SL CSI reporting MAC CE，且RX UE可以停止运行sl-CSI-ReportTimer，以及可以取消触发的SL CSI报告，例如将该SL CSI报告对应的状态位设置为取消触发状态。
(2)SL MAC CE包括IUC信息或IUC请求。
针对SL资源分配增强，目前引入了IUC机制。可参考图2。在S202中，UE1可以向UE2发送IUC信息，例如UE1通过IUC information MAC CE向UE2发送该IUC信息。相应的，UE2可接收该IUC information MAC CE，以获得该IUC信息。IUC信息可用于UE2进行SL资源选择。例如，IUC信息可以包括倾向(或，推荐)资源集(preferred resource set)或非倾向(或，非推荐)资源集(non-preferred resource set)，preferred resource set可包括推荐UE2选择的SL资源的信息，non-preferred resource set可包括不推荐UE2选择的SL资源的信息。
可选的，在S202之前还可以包括S201，UE2可以向UE1发送IUC请求，该IUC请求例如包括在IUC request MAC CE中，该IUC请求可用于请求IUC信息，例如请求UE1向UE2发送IUC信息。UE1接收该IUC request MAC CE后，可以向UE2发送IUC信息，例如向UE2发送包括IUC信息的IUC information MAC CE。
目前，对于基于UE2的请求所触发的IUC信息(例如UE1是接收来自UE2的IUC request MAC CE后向UE2发送IUC information MAC CE)，UE1可使用与用于传输UE2的IUC请求对应的发送资源池1来发送IUC信息。可理解为，UE2是使用发送资源池2内包括的SL资源向UE1发送该IUC请求(例如发送IUC request MAC CE)，则UE1可以利用发送资源池1所包括的SL资源向UE2发送IUC信息(例如发送IUC information MAC CE)。其中，该IUC信息所指示的SL资源，可以是发送资源池1内的SL资源。发送资源池1是配置给UE1使用的资源池，发送资源池2是配置给UE2使用的资源池，这两个资源池相对应，例如这两个资源池可以是同一资源池，也可以是不同的资源池。或者，对于基于条件触发的IUC信息，也就是说，UE2并未向UE1发送IUC请求，而是UE1根据其他条件的触发向UE2发送IUC信息。那么，UE1可使用与IUC信息关联的资源池(例如包括IUC信息所指示的SL资源所在的资源池)包括的SL资源向UE2发送IUC信息。其中，IUC信息所指示的SL资源也可以是该资源池内的SL资源。另外，一个载波可以包括一个或多个资源池。
目前，在SL通信中，一个UE可以向另一个UE发送SL MAC CE。现在的一些SL MAC CE所包括的信息是针对某个载波的，这是因为当前在SL场景下仅支持单载波通信。当考虑在SL场景下采用多载波通信时，如果还是按照目前的方式，则接收端UE接收到SL MAC CE后，无法确定该SL MAC CE包括的信息究竟针对哪个载波，会影响SL MAC CE的功能实现，从而可能导致信息指示错误，降低SL通信质量。
鉴于此，提供本申请实施例的技术方案。本申请实施例中，第一UE可以根据载波信息确定至少一个侧行控制元素，从而至少一个侧行控制元素能够参与SL LCP过程，相当于本申请实施例通过载波信息从待发送的侧行控制元素中筛选出了部分侧行控制元素，筛选出的至少一个侧行控制元素可以参与SL LCP过程，例如参与确定第一目的地址，而未筛选出的侧行控制元素可以不参与确定第一目的地址，从而根据第一目的地址所确定的第一侧行控制元素在较大概率上也属于至少一个侧行控制元素，或者说也是根据载波信息确定的。如果第一侧行控制元素也是根据载波信息确定的，则接收端接收第一侧行控 制元素后，就能够确定第一侧行控制元素包括的信息所对应的载波，从而减小了指示错误的概率，提高了侧行通信质量。
本申请实施例中，侧行控制元素例如为SL MAC CE，或者也可以是其他的侧行传输信息。在后文中，以侧行控制元素是SL MAC CE为例进行介绍。
本申请实施例中，对于SL可以简称为“侧行”，例如SL CSI报告可以简称为侧行CSI报告，SL MAC CE可以简称为侧行MAC CE，SL LCP可以简称为侧行LCP等，后文以此为例。或者，对于SL也可以称为“侧行链路”，例如SL CSI报告也可以称为侧行链路CSI报告，SL MAC CE也可以称为侧行链路MAC CE，SL LCP也可以称为侧行链路LCP等。
可参考图3，为本申请实施例适用的一种通信网络架构。UE1和UE2进行SL通信，例如UE1可以向UE2发送数据，例如该数据为SL MAC CE。UE1可以处于覆盖范围内(in coverage，IC)状态或覆盖范围外(out of coverage，OOC)状态，当UE1处于RRC连接(connected)态时，UE1可以向接入网设备(如图3所示的接入网设备)请求SL资源以发送SL信息，例如发送SL MAC CE或SL数据等，这种模式称为模式1(mode1)的资源分配模式。在mode 1下，接入网设备可以通过下行控制信息(downlink control information，DCI)为UE1调度SL资源，或者通过RRC消息为UE1配置SL配置授权(configured grant)。
或者，UE1也可以工作在模式2(mode2)。当UE1工作在mode2时，UE1可以处于RRC连接态、RRC非激活(inactive)态、RRC空闲(idle)态或OOC状态等。在mode2下，UE1可以从接入网设备接收SL资源池的信息，或者根据预配置的信息确定SL资源池，从而可以在该SL资源池中选择SL资源来发送SL信息，例如发送SL MAC CE或SL数据等。其中，UE1从该SL资源池中选择SL资源，可以随机选择，或者也可以基于监听(sensing)或者部分监听(partial sensing)的结果来选择。
为了更好地介绍本申请实施例，下面结合附图介绍本申请实施例所提供的方法。本申请的各个实施例中，SL MAC CE可指示待发送的信息，例如一种指示方式为，SL MAC CE包括待发送的信息；又例如，另一种指示方式为，SL MAC CE包括指示信息，通过该指示信息能够指示待发送的信息，接收端根据该指示信息能够确定该待发送的信息。待发送的信息例如包括SL CSI报告、IUC信息或IUC请求中的一种或多种，还可以包括其他的侧行信息。为了方便描述，在后文中均以SL MAC CE包括待发送的信息为例。可以理解的，后文中所述的SL MAC CE包括相应的信息，均可替换为SL MAC CE指示该信息。另外，LCH也可指示待发送的信息，指示方式与SL MAC CE的指示方式是类似的。为了方便描述，在后文中均以LCH包括待发送的信息为例。可以理解的，后文中所述的LCH包括相应的信息，均可替换为LCH指示该信息。
后文中如无特殊说明，则本申请的各个实施例对应的附图中，虚线表示的步骤均为可选的步骤。本申请的各个实施例所提供的方法均可应用于图3所示的网络架构，例如本申请的各个实施例提供的方法所涉及的第一UE可以是图3的UE1，本申请的各个实施例提供的方法所涉及的第二UE可以是图3中的UE2，本申请的各个实施例提供的方法所涉及的接入网设备可以是图3中的接入网设备。
首先介绍本申请实施例提供的第一种通信方法，请参见图4，为该方法的流程图。
S401、第一UE根据载波信息确定至少一个侧行控制元素。该至少一个侧行控制元素中的一个或多个侧行控制元素例如为SL MAC CE，例如，该至少一个侧行控制元素中的每个侧行控制元素为SL MAC CE。在后文中，以该至少一个侧行控制元素中的每个侧行控制元素为SL MAC CE为例，因此该至少一个侧行控制元素在后文中描述为至少一个SL MAC CE。
第一UE在执行SL新传之前，可以执行SL LCP过程。例如第一UE有LCH和/或SL MAC CE待发送，第一UE也确定了用于本次传输的SL资源(例如称为第一SL资源)，那么通过SL LCP过程，第一UE可以确定将第一SL资源分配给待发送的哪些LCH和/或SL MAC CE。其中，如果第一UE工作在mode1下，则第一SL资源可以是第一UE向接入网设备请求的SL资源；如果第一UE工作在mode2下，则第一SL资源可以是第一UE从SL资源池中选择得到的SL资源。待发送的LCH可以有一个或多个，待发送的LCH也可以理解为待发送的信息的目的(destination)地址所关联的LCH，该LCH包括待发送的信息。待发送的SL MAC CE可以有一个或多个，待发送的SL MAC CE也可以理解为待发送的信息的目的地址所关联的SL MAC CE，该SL MAC CE包括待发送的信息。其中，LCH包括的待发送的信息与SL MAC CE包括的待发送的信息相同或不同。
本申请实施例中，该至少一个SL MAC CE例如是根据载波信息从待发送的SL MAC CE中确定的， 至少一个SL MAC CE可包括待发送的SL MAC CE中的部分或全部SL MAC CE。该载波信息可以包括至少一个SL MAC CE对应的载波的信息，或者，该载波信息可以包括待发送的SL MAC CE对应的载波的信息。根据载波信息确定至少一个SL MAC CE，例如一种方式为，根据载波信息以及第一SL资源确定至少一个SL MAC CE。这样确定的至少一个SL MAC CE对应的载波可以与第一SL资源具有相应的关系，例如接收端UE(例如第二UE)根据第一SL资源所在的载波就能确定至少一个SL MAC CE对应的载波。如果没有本申请实施例的技术方案，则如果是多载波通信的SL场景，接收端UE可能无法确定SL MAC CE对应的载波，从而出现载波确定错误的情况，例如接收端UE可能将原本对应于载波1的SL MAC CE确定为对应于载波2，则原本应用于载波1的处理机制可能误用于载波2，可能导致通信质量下降，甚至出现传输失败等情况。而应用本申请实施例的技术方案后，即使在多载波通信的SL场景下，接收端UE根据第一SL资源所在的载波也能确定SL MAC CE对应的载波，从而减小SL MAC CE对于载波指示错误的概率，提高侧行通信质量。
可选的，根据载波信息以及第一SL资源确定至少一个SL MAC CE，例如包括：确定第一SL资源所在的载波包括至少一个SL MAC CE对应的载波，和/或，确定至少一个SL MAC CE对应的载波与第一SL资源所在的载波为同一载波。例如，如果待发送的SL MAC CE中，有一个SL MAC CE对应的载波包括在第一SL资源所在的载波中，和/或，该SL MAC CE对应的载波与第一SL资源所在的载波为同一载波，则该SL MAC CE可以是至少一个SL MAC CE中的一个；或者，如果待发送的SL MAC CE中，有一个SL MAC CE对应的载波未包括在第一SL资源所在的载波中，且该SL MAC CE对应的载波与第一SL资源所在的载波为不同的载波，则该SL MAC CE可以不包括在至少一个SL MAC CE中。例如第一UE向第二UE发送了至少一个SL MAC CE中的一个SL MAC CE，第二UE在接收该SL MAC CE后，能够确定第一SL资源所在的载波包括该SL MAC CE对应的载波，或确定第一SL资源所在的载波与该SL MAC CE对应的载波为同一载波。而第二UE是通过第一SL资源接收该SL MAC CE，因此第二UE能够确定第一SL资源所在的载波，则第二UE能够确定该SL MAC CE对应的载波，或者，确定该SL MAC CE包括的信息对应的载波。
SL MAC CE可包括待发送的信息。待发送的信息例如为SL CSI报告、IUC信息或IUC请求等，或者也可以是其他信息，具体不限制。SL MAC CE包括的信息不同时，该SL MAC CE对应的载波也可能有所不同，如下以第二SL MAC CE为例进行介绍。第二SL MAC CE例如为待发送的SL MAC CE中的任意一个，或者为至少一个SL MAC CE中的任意一个。
作为一种可选的实施方式，如果第二SL MAC CE包括SL CSI报告，或者说，第二SL MAC CE包括的待发送的信息为SL CSI报告，那么第二SL MAC CE对应的载波例如为用于传输SCI的载波，或为该SCI调度(或，指示)的SL传输所在的载波，或为该SCI调度(或，指示)的SL资源所在的载波。其中，该SCI调度(或，指示)的SL资源，例如为用于传输SL CSI报告的SL资源。该SCI调度的SL传输所在的载波，也就是第二SL MAC CE所在的载波。其中，该SCI调度的SL传输，例如为SL CSI报告，或为其他的SL信息。可选的，包括SL CSI报告的SL MAC CE例如为SL CSI reporting MAC CE。该SCI例如来自第二UE，该SCI可以指示第一UE发送该SL CSI报告，例如该SCI包括的CSI request field的值为“1”，表明该SCI用于触发SL CSI报告。
例如，在同载波调度的情况下，传输SCI的载波也就是传输第二SL MAC CE的载波。因此对于同载波调度的情况，第二SL MAC CE对应的载波可以是用于传输SCI的载波，或者也可以是该SCI调度(或，指示)的SL传输所在的载波，或为该SCI调度(或，指示)的SL资源所在的载波。
又例如，在跨载波调度的情况下，传输SCI的载波可能是传输第二SL MAC CE的载波，也可能不是传输第二SL MAC CE的载波。因此对于跨载波调度的情况，第二SL MAC CE对应的载波可以是该SCI调度(或，指示)的SL传输所在的载波，或者是该SCI调度(或，指示)的SL资源所在的载波。
作为另一种可选的实施方式，如果第二SL MAC CE包括IUC信息，或者说，第二SL MAC CE包括的待发送的信息为IUC信息，那么第二SL MAC CE对应的载波例如为该IUC信息关联的资源池所在的载波，或为该IUC信息指示的SL资源所在的资源池所在的载波，或为用于传输该IUC信息的载波。例如，如果第一UE是基于来自第二UE的IUC请求而向第二UE发送该IUC信息，那么该IUC信息关联的资源池例如为配置给第一UE的资源池A。其中，资源池A与配置给第二UE的资源池B可以是同一资源池，也可以是不同的资源池，第二UE是采用了资源池B内的SL资源发送IUC请求。在这种情况下，IUC信息指示的SL资源所在的资源池与该资源池A可以是同一资源池，因此，该IUC 信息关联的资源池所在的载波与该IUC信息指示的SL资源所在的资源池所在的载波，可以是同一载波；而用于传输该IUC信息的SL资源也可以是该资源池A内的资源，因此，用于传输该IUC信息的载波与该发送资源池所在的载波也可以是同一载波。又例如，第二UE并未向第一UE发送IUC请求，而是第一UE根据其他条件的触发向第二UE发送该IUC信息。那么，该IUC信息关联的资源池例如为预先配置的，或由协议预定义等，例如称为资源池C。在这种情况下，IUC信息指示的SL资源所在的资源池与该资源池C可以是同一资源池；而用于传输该IUC信息的SL资源也可以是该资源池C内的资源，因此，用于传输该IUC信息的载波与该资源池C所在的载波也可以是同一载波。
作为又一种可选的实施方式，如果第二SL MAC CE包括IUC请求，或者说，第二SL MAC CE包括的待发送的信息为IUC请求，那么第二SL MAC CE对应的载波例如为该IUC请求关联的资源池所在的载波，或为该IUC请求指示的SL资源所在的资源池所在的载波，或为用于传输该IUC请求的载波。例如，第一UE可以向其他UE(例如第二UE)发送IUC请求，以请求获得IUC信息。该IUC请求关联的资源池例如为用于发送该IUC请求的SL资源所在的发送资源池，例如称为资源池D。该IUC请求除了可以请求获得IUC信息外，还可以指示相应的SL资源，该IUC请求所指示的SL资源例如也包括在资源池D中，因此，该IUC请求关联的资源池所在的载波与该IUC请求指示的SL资源所在的资源池所在的载波可以是同一载波。另外，用于传输该IUC请求的SL资源也可以是资源池D内的SL资源，因此该IUC请求关联的资源池所在的载波与用于传输该IUC请求的载波也可以是同一载波。
还有一种可能，第一UE根据载波信息无法确定至少一个SL MAC CE。例如，第一SL资源所在的载波不包括待发送的任意SL MAC CE对应的载波，以及，待发送的SL MAC CE对应的载波与第一SL资源所在的载波不是同一载波，则第一UE无法确定至少一个SL MAC CE。在这种情况下，可选的，第一UE可以执行载波重选或载波选择，以重新确定载波。在重新确定载波后，第一UE可以获得该载波上的SL资源，例如称为第二SL资源，第二SL资源可以是用于本次侧行传输的资源。第一UE可以根据第二SL资源重新执行S401，例如，第一UE可以根据载波信息确定一个或多个SL MAC CE，此时的载波信息可包括所述一个或多个SL MAC CE对应的载波的信息，或包括待发送的SL MAC CE对应的载波的信息。一种确定方式例如为，第一UE根据载波信息以及第二SL资源确定一个或多个SL MAC CE，对于该过程可参考前文的介绍。
可选的，第一UE重新确定的载波可以包括待发送的SL MAC CE对应的全部载波或部分载波。例如，第一UE重新确定的载波可包括所述至少一个SL MAC CE对应的载波。这样可以使得第一UE根据载波信息以及第二SL资源能够确定出SL MAC CE，使得本申请实施例的方法得以执行。
作为一种可选的实施方式，载波重选或载波选择过程可以在第一时长内完成。第一时长例如为第一计时器(或，第一定时器)对应的时长，第一计时器可指示一个SL MAC CE的有效期。例如，如果第一UE在第一计时器对应的时长内发送了该SL MAC CE，则该SL MAC CE有效，或者说该SL MAC CE包括的内容有效；或者，如果第一UE未在第一计时器对应的时长内发送该SL MAC CE，则该SL MAC CE无效，或者说该SL MAC CE包括的内容无效。例如该SL MAC CE为SL CSI reporting MAC CE，则第一计时器的计时时长例如与SL CSI reporting MAC CE对应的计时器的计时时长相等，例如，第一计时器为SL CSI reporting MAC CE对应的计时器，或者，第一计时器也可以是其他计时器。例如第二UE向第一UE发送SCI以触发SL CSI报告，则第一UE接收该SCI后可以启动该SL CSI报告对应的第一计时器。
也就是说，载波重选或载波选择过程可以在一个SL MAC CE的有效期内完成，以减小信息传输时延。可选的，如果第一UE无法在第一时长内完成载波重选或载波选择过程，第一UE可以向待发送的信息的目的地址(例如第二UE的地址是待发送的信息的目的地址)发送指示信息，该指示信息可指示第一UE无法在第一时长内发送SL MAC CE。第二UE接收该指示信息后，可以延长该SL MAC CE的有效期。
作为另一种可选的实施方式，载波重选或载波选择过程可以在第二时长内完成。第二时长例如为第二计时器(或，第二定时器)对应的时长，第二计时器对应的时差大于第一计时器对应的时差。关于第一计时器的介绍可参考前文。第二计时器例如为本申请实施例提供的计时器，考虑到载波重选或载波选择过程所需的时间可能较长，如果用第一计时器来计时，很可能第一UE无法在第一计时器对应的时长内完成载波重选或载波选择，因此第一UE可以维护第二计时器(第二UE也可以维护第二计时器)，以使得第一UE尽量有较为充足的时间进行载波重选或载波选择，减小SL MAC CE失效的概率。
S402、第一UE根据至少一个SL MAC CE确定第一目的地址。例如，第一目的地址为destination L2 ID，或为destination。
其中，S402可视为SL LCP过程所包括的第一个步骤。S401可以发生在SL LCP过程之前，可以理解为，根据载波信息从待发送的SL MAC CE中筛选至少一个SL MAC CE，至少一个SL MAC CE能够参与从S402开始的SL LCP过程，而未筛选出的SL MAC CE可以不参与SL LCP过程。或者，S402与S401也可以视为是同一个步骤，例如在该步骤中，第一UE可以根据载波信息确定至少一个SL MAC CE，再根据至少一个SL MAC CE确定第一目的地址，相当于对现有的SL LCP过程的第一个步骤进行了改进。
可理解为，本申请实施例通过载波信息从待发送的SL MAC CE中筛选出了至少一个SL MAC CE，筛选出的至少一个SL MAC CE可以继续参与SL LCP过程，例如参与确定第一目的地址，而未筛选出的SL MAC CE可以不参与确定第一目的地址。由此减少了参与确定第一目的地址的SL MAC CE的数量，简化了确定第一目的地址的过程。
第一UE根据至少一个SL MAC CE确定第一目的地址，例如一种方式为，第一UE根据至少一个SL MAC CE的优先级确定第一目的地址。例如，第一UE可以确定至少一个SL MAC CE中优先级最高的SL MAC CE关联的目的地址为第一目的地址。
或者，除了SL MAC CE待发送外，可能还有LCH待发送，因此，第一UE根据至少一个SL MAC CE确定第一目的地址，例如另一种方式为，第一UE根据至少一个SL MAC CE的优先级和待发送的LCH的优先级确定第一目的地址。例如，第一UE可以确定至少一个SL MAC CE以及待发送的LCH中优先级最高的SL MAC CE和/或LCH关联的目的地址为第一目的地址。其中，待发送的LCH的数量可以是一个或多个。一个SL MAC CE关联的目的地址，例如为用于接收该SL MAC CE的接收端的地址，对于LCH关联的目的地址的理解也是类似的。可选的，第一UE可以从至少一个SL MAC CE中确定优先级最高且满足第一条件的SL MAC CE，和/或，从待发送的LCH中确定优先级最高且满足第一条件的LCH，第一UE可以确定所选择的SL MAC CE和/或LCH关联的目的地址为第一目的地址。或者，第一UE可以从至少一个SL MAC CE中确定优先级最高的SL MAC CE，和/或，从待发送的LCH中确定优先级最高且满足第一条件的LCH，第一UE可以确定所选择的SL MAC CE和/或LCH关联的目的地址为第一目的地址。也就是说，第一UE可以按照第一条件筛选SL MAC CE，也可以不按照第一条件筛选SL MAC CE(或者说，SL MAC CE不必满足第一条件)。
第一条件例如包括：具有有效的SL传输信息，和/或，允许使用对应的SL配置授权(configured grant，CG)类型(type)1对应的第一SL资源(或，第二SL资源)。其中，一个LCH具有有效的SL传输信息，是指该LCH不为空或者指该LCH有待传输信息；一个SL MAC CE具有有效的SL传输信息，是指该SL MAC CE不为空或者指该SL MAC CE有待传输信息。另外，如果第一SL资源(或，第二SL资源)是CG type1，只有LCH配置允许使用CG type1时才能用第一SL资源(或，第二SL资源)传输，否则不能用第一SL资源(或，第二SL资源)传输。
其中，LCH所满足的第一条件，与SL MAC CE所满足的第一条件，可以相同也可以不同。可选的，SL MAC CE所满足的第一条件可以包括如上所介绍的第一条件所包括的部分条件。例如，SL MAC CE满足的第一条件可以包括具有有效的SL传输信息的条件，而不包括允许使用对应的SL CG type1对应的第一SL资源(或，第二SL资源)的条件；或者，SL MAC CE所满足的第一条件可以包括允许使用对应的SL CG type1对应的第一SL资源(或，第二SL资源)的条件，而不包括具有有效的SL传输信息的条件。
S403、第一UE根据第一目的地址确定第一LCH和/或第一SL MAC CE。
S403可视为SL LCP过程包括的第二个步骤。在S402中第一UE确定了第一目的地址，第一目的地址可以关联一个或多个LCH，和/或，关联一个或多个SL MAC CE。那么在S403中，第一UE可以从第一目的地址关联的LCH中确定第一LCH，和/或，从第一目的地址关联的SL MAC CE中确定第一SL MAC CE。第一LCH包括的LCH的数量可以大于或等于1，第一SL MAC CE所包括的SL MAC CE的数量可以大于或等于1。
例如，第一UE可以从第一目的地址关联的LCH中确定满足第二条件的LCH，和/或，从第一目的地址关联的SL MAC CE中确定满足第二条件的SL MAC CE。或者，第一UE可以从第一目的地址关联的LCH中确定满足第二条件的LCH，和/或，确定第一目的地址关联的SL MAC CE。也就是说，第一 UE可以按照第二条件筛选SL MAC CE，也可以不按照第二条件筛选SL MAC CE(或者说，SL MAC CE不必满足第二条件)。第二条件例如包括如下一项或多项：具有有效的SL传输信息，允许使用第一SL资源(或，第二SL资源)对应的SL CG type，与第一目的地址关联的最高优先级的或者最高优先级且满足第一条件的LCH对应的混合自动重传请求(hybrid automatic repeat request，HARQ)反馈(feedback)使能(enabled)/未使能(disabled)的属性相同，或，与第一目的地址关联的最高优先级的或者最高优先级且满足第一条件的SL MAC CE对应的HARQ feedback enabled/disabled的属性相同。其中，如果与第一目的地址关联的LCH中优先级最高的LCH是enabled的，则只有enabled的LCH或者SL MAC CE在S403中才能被选择；或者，如果与第一目的地址关联的LCH中优先级最高的LCH是disabled的，则只有disabled的LCH或者SL MAC CE在S403中才能被选择。
LCH所满足的第二条件，与SL MAC CE所满足的第二条件，可以相同也可以不同。可选的，SL MAC CE所满足的第二条件可以包括如上所介绍的第二条件所包括的部分条件。例如，SL MAC CE满足的第二条件可以包括具有有效的SL传输信息的条件，以及允许使用第一SL资源(或，第二SL资源)对应的SL CG type的条件，但不包括与第一目的地址关联的最高优先级的或者最高优先级且满足第一条件的SL MAC CE对应的HARQ feedback enabled/disabled的属性相同的条件；或者，SL MAC CE满足的第二条件可以包括与第一目的地址关联的最高优先级的或者最高优先级且满足第一条件的SL MAC CE对应的HARQ feedback enabled/disabled的属性相同的条件，以及包括具有有效的SL传输信息的条件，但不包括允许使用第一SL资源(或，第二SL资源)对应的SL CG type的条件，等等。
可选的，第一SL MAC CE可以属于S401中的至少一个SL MAC CE，或者理解为，第一SL MAC CE可以是根据载波信息确定的。例如，第一UE可以从第一目的地址关联的SL MAC CE中确定满足第二条件的SL MAC CE，再根据载波信息从满足第二条件的SL MAC CE中确定第一SL MAC CE；或者，第一UE根据载波信息从第一目的地址关联的SL MAC CE中确定M个SL MAC CE，再从M个SL MAC CE中确定满足第二条件的第一SL MAC CE，M为正整数；或者，第一UE可以根据载波信息从第一目的地址关联的SL MAC CE中确定第一SL MAC CE。其中，第一UE根据载波信息确定SL MAC CE的方式可参考前文的介绍。
可理解为，载波信息也可以作用于SL LCP过程的第二个步骤中，使得SL LCP过程所确定的第一SL MAC CE是根据载波信息确定的。例如第一UE向第二UE发送了第一SL MAC CE，第二UE在接收第一SL MAC CE后，能够确定第一SL资源(或，第二SL资源)所在的载波包括第一SL MAC CE对应的载波，或确定第一SL资源(或，第二SL资源)所在的载波与第一SL MAC CE对应的载波为同一载波。而第二UE是通过第一SL资源(或，第二SL资源)接收第一SL MAC CE，因此第二UE能够确定第一SL资源(或，第二SL资源)所在的载波，则第二UE能够确定第一SL MAC CE对应的载波，或者，确定第一SL MAC CE包括的信息对应的载波。从而即使在多载波的SL场景下，接收端UE也能够确定所接收的SL MAC CE对应的载波，减小了SL MAC CE对于载波指示错误的概率，提高了侧行通信质量。
或者，载波信息也可以不作用于SL LCP过程的第二个步骤，则第一SL MAC CE可能属于S401中的至少一个SL MAC CE，或者也可以不属于该至少一个SL MAC CE。可理解为，第一SL MAC CE究竟是否属于该至少一个SL MAC CE，取决于该至少一个SL MAC CE是否与第一目的地址关联，或者取决于该至少一个SL MAC CE是否与第一目的地址关联且是否满足第二条件，而与载波信息无关。
可选的，该方法还可以包括S404和S405。
S404、第一UE将第一SL资源(或，第二SL资源)分配给第一LCH和/或第一SL MAC CE。
例如，第一UE可以按照第一LCH的优先级和/或第一SL MAC CE的优先级，将第一SL资源(或，第二SL资源)分配给第一LCH和/或第一SL MAC CE。例如第一UE可以先为优先级较高的传输信息(例如LCH和/或SL MAC CE)分配SL资源，再为优先级较低的传输信息分配SL资源。例如，一种优先级从高到低的顺序为：信令控制信道(signaling control channel，SCCH)承载的信息的优先级>SL-CSI reporting MAC CE的优先级>侧行链路UE间协作请求MAC CE(sidelink inter-UE coordination request MAC CE)的优先级以及侧行链路UE间协作信息MAC CE(sidelink inter-UE coordination information MAC CE)的优先级>侧行链路非连续接收控制MAC CE(SL DRX command MAC CE)的优先级>任何侧行传输信道(sidelink traffic channe，STCH)承载的信息的优先级。
例如，第一LCH承载的是STCH的信息，则根据如上优先级顺序可知，第一SL MAC CE的优先 级可以高于第一LCH的优先级，则第一UE可以优先将第一SL资源(或，第二SL资源)分配给第一SL MAC CE。如果第一SL资源(或，第二SL资源)中还有剩余资源，则第一UE再将剩余资源分配给第一LCH。
又例如，第一LCH承载的是SCCH的信息，则根据如上优先级顺序可知，第一SL MAC CE的优先级可以低于第一LCH的优先级，则第一UE可以优先将第一SL资源(或，第二SL资源)分配给第一LCH。如果第一SL资源(或，第二SL资源)中还有剩余资源，则第一UE再将剩余资源分配给第一SL MAC CE。
S405、第一UE发送第一LCH和/或第一SL MAC CE。其中，第一LCH和第一SL MAC CE的接收端可能相同或不同，例如第二UE是第一LCH和/或第一SL MAC CE的接收端，则第二UE可以接收来自第一UE的第一LCH和/或第一SL MAC CE。
本申请实施例中，第一UE可以根据载波信息确定至少一个SL MAC CE，从而至少一个SL MAC CE能够参与SL LCP过程，相当于本申请实施例通过载波信息从待发送的SL MAC CE中筛选出了部分SL MAC CE，筛选出的至少一个SL MAC CE可以参与SL LCP过程，例如参与确定第一目的地址，而未筛选出的SL MAC CE可以不参与确定第一目的地址。由此减少了参与确定第一目的地址的SL MAC CE的数量，简化了确定第一目的地址的过程。另外，第一SL MAC CE可以属于S401中的至少一个SL MAC CE，例如第一UE向第二UE发送了第一SL MAC CE，第二UE在接收第一SL MAC CE后，能够确定第一SL MAC CE对应的载波，或者，确定第一SL MAC CE包括的信息对应的载波。从而即使在多载波的SL场景下，接收端UE也能够确定所接收的SL MAC CE对应的载波，减小了SL MAC CE对于载波指示错误的概率，提高了侧行通信质量。
在图4所示的实施例中，第一UE可以在执行SL LCP过程之前根据载波信息确定至少一个SL MAC CE，或者可以在执行SL LCP的第一个步骤时根据载波信息确定至少一个SL MAC CE，或者在执行SL LCP的第一个步骤和第二个步骤时都考虑根据载波信息所确定的SL MAC CE。除此之外，本申请实施例提供第二种通信方法，在该方法中，第一UE可以在执行SL LCP的第二个步骤时考虑根据载波信息确定的SL MAC CE，而在执行SL LCP的第一个步骤时可以不考虑根据载波信息确定的SL MAC CE。请参见图5，为该方法的流程图。
S501、第一UE根据待发送的LCH和/或SL MAC CE确定第一目的地址。例如，第一目的地址为destination L2 ID，或为destination。
S501可以视为SL LCP过程包括的第一个步骤。例如第一UE有LCH和/或SL MAC CE待发送，第一UE也确定了用于本次传输的SL资源(例如称为第一SL资源)，那么通过SL LCP过程，第一UE可以确定第一SL资源可以分配给待发送的哪些LCH和/或SL MAC CE。其中，如果第一UE工作在mode1下，则第一SL资源可以是第一UE向接入网设备请求的SL资源；如果第一UE工作在mode2下，则第一SL资源可以是第一UE从SL资源池中选择的SL资源。待发送的LCH可以有一个或多个，待发送的LCH也可以理解为待发送的信息的目的(destination)地址所关联的LCH，该LCH包括待发送的信息。待发送的SL MAC CE可以有一个或多个，待发送的SL MAC CE也可以理解为待发送的信息的目的地址所关联的SL MAC CE，该SL MAC CE包括待发送的信息。其中，LCH包括的待发送的信息与SL MAC CE包括的待发送的信息相同或不同。
第一UE根据待发送的LCH和/或SL MAC CE确定第一目的地址，例如一种方式为，第一UE根据待发送的LCH的优先级和/或SL MAC CE的优先级确定第一目的地址。例如，第一UE可以确定待发送的LCH和/或SL MAC CE中优先级最高的LCH和/或SL MAC CE关联的目的地址为第一目的地址。其中，待发送的LCH的数量可以是一个或多个。待发送的SL MAC CE的数量可以是一个或多个。一个SL MAC CE关联的目的地址，例如为用于接收该SL MAC CE的接收端的地址，对于LCH关联的目的地址的理解也是类似的。
或者，第一UE根据待发送的LCH和/或SL MAC CE确定第一目的地址，另一种方式为，第一UE可以从待发送的SL MAC CE中确定优先级最高且满足第一条件的SL MAC CE，和/或，从待发送的LCH中确定优先级最高且满足第一条件的LCH，第一UE可以确定所选择的SL MAC CE和/或LCH关联的目的地址为第一目的地址。或者，第一UE可以从待发送的SL MAC CE中确定优先级最高的SL MAC CE，和/或，从待发送的LCH中确定优先级最高且满足第一条件的LCH，第一UE可以确定所选择的SL MAC CE和/或LCH关联的目的地址为第一目的地址。关于第一条件的介绍可参考图4所示的实施例中的S402。
S502、第一UE根据载波信息从第一目的地址关联的SL MAC CE中确定第一SL MAC CE。
S502可视为SL LCP过程包括的第二个步骤。在S501中第一UE确定了第一目的地址，第一目的地址可以关联一个或多个LCH，和/或，关联一个或多个SL MAC CE。那么在S502中，第一UE可以从第一目的地址关联的LCH中确定第一LCH，和/或，根据载波信息从第一目的地址关联的SL MAC CE中确定第一SL MAC CE。第一LCH包括的LCH的数量可以大于或等于1，第一SL MAC CE所包括的SL MAC CE的数量可以大于或等于1。
该载波信息可以包括第一SL MAC CE对应的载波的信息，或者，该载波信息可以包括第一目的地址关联的所有SL MAC CE对应的载波的信息。第一UE根据载波信息从第一目的地址关联的SL MAC CE中确定第一SL MAC CE，例如一种方式为，第一UE根据载波信息以及第一SL资源从第一目的地址关联的SL MAC CE中确定第一SL MAC CE。这样确定的第一SL MAC CE对应的载波可以与第一SL资源具有相应的关系，例如接收端UE(例如第二UE)根据第一SL资源所在的载波就能确定第一SL MAC CE对应的载波。从而即使在多载波通信的SL场景下，接收端UE根据第一SL资源所在的载波也能确定SL MAC CE对应的载波，从而减小SL MAC CE对于载波指示错误的概率，提高侧行通信质量。
可选的，根据载波信息以及第一SL资源从第一目的地址关联的SL MAC CE中确定第一SL MAC CE，例如包括：确定第一SL资源所在的载波包括第一SL MAC CE对应的载波，和/或，确定第一SL MAC CE对应的载波与第一SL资源所在的载波为同一载波。关于这部分内容的更多介绍，例如第一SL MAC CE对应的载波等内容，可参考图4所示的实施例的S401。
例如，第一UE可以从第一目的地址关联的LCH中确定满足第二条件的LCH，例如为第一LCH；和/或，从第一目的地址关联的SL MAC CE中确定满足第二条件的至少一个SL MAC CE，再根据载波信息和第一SL资源从至少一个SL MAC CE中确定第一SL MAC CE(或者，根据载波信息和第一SL资源从第一目的地址关联的SL MAC CE中确定至少一个SL MAC CE，再从至少一个SL MAC CE中确定满足第二条件的第一SL MAC CE；或者，根据载波信息和第一SL资源从第一目的地址关联的SL MAC CE中确定第一SL MAC CE)。关于第二条件可参考图4所示的实施例的S403。
可选的，该方法还可以包括S503和S504。
S503、将第一SL资源分配给第一SL MAC CE和/或第一LCH。
关于S503的更多内容可参考图4所示的实施例中的S404。
S504、第一UE发送第一LCH和/或第一SL MAC CE。其中，第一LCH和第一SL MAC CE的接收端可能相同或不同，例如第二UE是第一LCH和/或第一SL MAC CE的接收端，则第二UE可以接收来自第一UE的第一LCH和/或第一SL MAC CE。
还有一种可能，第一UE根据载波信息无法从第一目的地址关联的SL MAC CE中确定SL MAC CE。例如，第一SL资源所在的载波不包括第一目的地址关联的任意SL MAC CE对应的载波，以及，第一目的地址关联的SL MAC CE对应的载波与第一SL资源所在的载波不是同一载波，则第一UE无法确定SL MAC CE。在这种情况下，可选的，第一UE可以执行载波重选或载波选择，以重新确定载波。在重新确定载波后，第一UE可以获得该载波上的SL资源，例如称为第二SL资源，第二SL资源可以是用于本次侧行传输的资源。第一UE可以根据第二SL资源重新执行S501～S504。
可选的，第一UE重新确定的载波可以包括第一目的地址关联的SL MAC CE对应的全部载波或部分载波。例如，第一UE重新确定的载波可包括第一SL MAC CE对应的载波。这样可以使得第一UE根据载波信息以及第二SL资源能够确定出第一SL MAC CE，使得本申请实施例的方法得以执行。
作为一种可选的实施方式，载波重选或载波选择过程可以在第一时长内完成。对此可参考图4所示的实施例的S401。可选的，如果第一UE无法在第一时长内完成载波重选或载波选择过程，第一UE可以向待发送的信息的目的地址(例如第二UE的地址是待发送的信息的目的地址)发送指示信息，该指示信息可指示第一UE无法在第一时长内发送SL MAC CE。第二UE接收该指示信息后，可以延长该SL MAC CE的有效期。
作为另一种可选的实施方式，载波重选或载波选择过程可以在第二时长内完成。对此可参考图4所示的实施例的S402。
本申请实施例中，第一UE可以在SL LCP的第二个步骤中根据载波信息确定第一SL MAC CE，例如第一UE向第二UE发送了第一SL MAC CE，第二UE在接收第一SL MAC CE后，能够确定第一SL  MAC CE对应的载波，或者，确定第一SL MAC CE包括的信息对应的载波。从而即使在多载波的SL场景下，接收端UE也能够确定所接收的SL MAC CE对应的载波，减小了SL MAC CE对于载波指示错误的概率，提高了侧行通信质量。
在图4所示的实施例或图5所示的实施例中，如果第一UE在某个SL载波上发送SL MAC CE，则可以表明该SL MAC CE对应于该SL载波，或者表明该SL MAC CE包括的内容对应于该SL载波。因此，SL MAC CE的格式可以采用现有的格式，例如称为第一格式。接下来介绍本申请实施例提供的第三种通信方法，在该方法中，可以更改SL MAC CE的格式，使得SL MAC CE能够适用于多载波场景。请参考图6，为该方法的流程图。
S601、第一UE确定SL MAC CE。
该SL MAC CE可包括第一信息。例如该SL MAC CE的格式为第二格式，在第二格式下，该SL MAC CE还包括该SL MAC CE对应的资源的信息。可选的，第一UE可以根据载波信息确定该SL MAC CE的格式为第二格式。该载波信息例如包括该SL MAC CE对应的载波的信息，和/或，包括第一UE与第二UE之间用于通信的载波的数量。关于这部分内容，将在后续其他实施例中介绍。
第一信息例如该SL MAC CE所承载的待发送的信息，例如第一信息为SL CSI报告、IUC信息或IUC请求等。该SL MAC CE对应的资源，例如为载波和/或资源池。根据第一信息的不同，该SL MAC CE对应的资源也可能有所不同，如下举例介绍。
作为一种可选的实施方式，第一信息为SL CSI报告(可选的，此时该SL MAC CE例如为SL CSI reporting MAC CE)，在这种情况下，该SL MAC CE对应的资源可以是载波。例如，该SL MAC CE对应的载波为用于传输SCI的载波，或为该SCI调度(或，指示)的SL传输所在的载波，或为该SCI调度(或，指示)的SL资源所在的载波。其中，该SCI调度(或，指示)的SL资源，例如为用于传输SL CSI报告的SL资源。该SCI调度的SL传输所在的载波，也就是该SL MAC CE所在的载波。该SCI例如来自第二UE，该SCI可以指示第一UE发送该SL CSI报告，例如该SCI包括的CSI request field的值为“1”，表明该SCI用于触发SL CSI报告。关于该SCI的更多内容可参考图4所示的实施例中的S401。
作为另一种可选的实施方式，第一信息为IUC信息(可选的，此时该SL MAC CE例如为IUC information MAC CE)，在这种情况下，该SL MAC CE对应的资源可以是载波。例如，该SL MAC CE对应的载波为该IUC信息关联的资源池所在的载波，或为该IUC信息指示的SL资源所在的资源池所在的载波，或为用于传输该IUC信息的载波。关于这部分内容的更多介绍，可参考图4所示的实施例的S401。
或者，如果第一信息为IUC信息，该SL MAC CE对应的资源也可以是资源池。例如，该SL MAC CE对应的资源池为该IUC信息关联的资源池，或为该IUC信息指示的SL资源所在的资源池，或为用于传输该IUC信息的SL资源所在的资源池。关于这部分内容的更多介绍，可参考图4所示的实施例的S401。
作为又一种可选的实施方式，第一信息为IUC请求(可选的，此时该SL MAC CE例如为IUC request MAC CE)，在这种情况下，该SL MAC CE对应的资源可以是载波。例如，该SL MAC CE对应的载波为该IUC请求关联的资源池所在的载波，或为该IUC请求指示的SL资源所在的资源池所在的载波，或为用于传输该IUC请求的载波。关于这部分内容的更多介绍，可参考图4所示的实施例的S401。
或者，如果第一信息为IUC请求，该SL MAC CE对应的资源也可以是资源池。例如，该SL MAC CE对应的资源池为该IUC请求关联的资源池，或为该IUC请求指示的SL资源所在的资源池，或为用于传输该IUC请求的SL资源所在的资源池。关于这部分内容的更多介绍，可参考图4所示的实施例的S401。
该SL MAC CE包括该SL MAC CE对应的资源的信息，例如一种方式为，该SL MAC CE包括该SL MAC CE对应的资源的索引，例如包括该SL MAC CE对应的载波的索引和/或该SL MAC CE对应的资源池的索引。例如载波的索引和/或资源池的索引可以由协议预定义；或者可由接入网设备预先配置给第一UE，第一UE再配置给第二UE；或者可由接入网设备预先分别配置给第一UE和第二UE；或者可由第一UE与第二UE协商确定。那么该SL MAC CE只需要包括载波的索引或资源池的索引，第二UE就能确定相应的载波或资源池。
其中，如果该SL MAC CE对应的资源为载波，则该SL MAC CE可以包括该SL MAC CE对应的 载波的信息，不必包括该载波包括的资源池的信息。
或者，如果该SL MAC CE对应的资源为资源池，则该SL MAC CE可以包括该SL MAC CE对应的资源池的信息而不包括该资源池所在的载波的信息，或者，该SL MAC CE也可以包括该SL MAC CE对应的资源池的信息以及包括该资源池所在的载波的信息。例如，如果不同载波上的资源池统一编号，即，一个资源池的索引唯一对应某个载波上的某个资源池，则该SL MAC CE可以包括资源池的索引而不包括该资源池所在的载波的索引，即使在多载波的情况下，第二UE根据一个资源池的索引也能唯一确定该资源池。又例如，如果不同载波上的资源池分别编号，即，一个资源池的索引可能并不是唯一对应一个载波上的一个资源池，而是不同载波上的两个资源池可能会使用同一个索引，在这种情况下，该SL MAC CE可以包括资源池的索引和该资源池所在的载波的索引，使得第二UE根据这两个索引能够唯一确定该资源池。
或者，该SL MAC CE包括该SL MAC CE对应的资源的信息的另一种方式为，该SL MAC CE可以包括比特地图(bitmap)，该bitmap包括的比特数与用于第一UE与第二UE之间通信的总的资源数相同，或者与第一UE被配置的资源数相同，该资源例如为载波或资源池。以载波为例，则该bitmap包括的比特数可以与第一UE与第二UE之间通信的载波的数量相同，或者与第一UE被配置的载波数量相同。该bitmap包括的比特与第一UE被配置的载波可以一一对应，例如该bitmap的某个比特的值为“1”，表明该SL MAC CE对应于该比特所对应的载波，而如果该比特的值为“0”，表明该SL MAC CE不对应于该比特所对应的载波。如果该bitmap包括的比特与第一UE被配置的资源池数量一一对应，则实现方式也是类似的。其中，该bitmap如果用于指示SL MAC CE对应的资源池，则不同载波上的资源池可以统一编号。
或者该SL MAC CE还可以通过其他方式包括该SL MAC CE对应的资源的信息，对此不做限制。
可选的，可以通过该SL MAC CE包括的N个比特来承载该SL MAC CE对应的资源的信息，N为正整数。例如现有的SL MAC CE包括8个比特，其中的3个比特为预留(reserved，R)比特，对此可参考图7A。那么N可以小于或等于3，相当于可以利用SL MAC CE中的预留比特承载该SL MAC CE对应的资源的信息。例如，该SL MAC CE包括该SL MAC CE对应的资源的索引，可参考图7B，为利用3个预留比特承载该SL MAC CE对应的资源的索引的示例。图7B中，3个预留比特的值为“001”，例如该取值指示该SL MAC CE对应的载波的索引为“1”，表明该SL MAC CE对应的载波为载波1。
可选的，该方法还包括S602，第一UE通过第一SL资源发送该SL MAC CE。相应的，第二UE通过第一SL资源接收来自第一UE的该SL MAC CE。关于第一SL资源可参考图4所示的实施例的介绍。其中，如果第一SL资源能够用于发送该SL MAC CE，例如第一SL资源能够用于发送该SL MAC CE以及该SL MAC CE的子头，则第一UE可以通过第一SL资源发送该SL MAC CE；或者，如果没有SL资源能够用于发送该SL MAC CE，例如没有SL资源能够用于发送该SL MAC CE以及该SL MAC CE的子头，则第一UE可以不发送该SL MAC CE，或者第一UE可以向接入网设备请求SL资源后发送该SL MAC CE。
本申请实施例中，第二UE根据该SL MAC CE所包括的该SL MAC CE对应的资源的信息，就能确定该SL MAC CE对应的资源，从而解除了SL MAC CE的传输与载波之间的约束关系，例如与载波1对应的SL MAC CE可以在载波1上传输，也可以在其他载波上传输，使得SL MAC CE的传输更为灵活。
根据前述实施例可知，在本申请实施例中，SL MAC CE可以采用第一格式，也可以采用第二格式。下面介绍本申请实施例提供的第四种通信方法，通过该方法可以确定SL MAC CE究竟采用哪种格式。请参考图8，为该方法的流程图。
S801、第一UE根据载波信息确定SL MAC CE的格式为第一格式或第二格式。
其中，当该SL MAC CE的格式为第二格式时，该SL MAC CE包括该SL MAC CE对应的资源的信息；或者，当该SL MAC CE的格式为第一格式时，该SL MAC CE不包括该SL MAC CE对应的资源的信息。关于该SL MAC CE对应的资源，以及该SL MAC CE对应的资源的信息等内容，可参考图6所示的实施例中S601的相关介绍。
该载波信息例如包括该SL MAC CE对应的载波的信息，和/或，包括第一UE与第二UE之间用于通信的载波的数量。第一UE根据载波信息确定SL MAC CE的格式为第一格式或第二格式，例如一种方式为，如果第一SL资源所在的载波包括该SL MAC CE对应的载波，则该SL MAC CE的格式为第一 格式，否则，如果第一SL资源所在的载波不包括该SL MAC CE对应的载波，则该SL MAC CE的格式为第二格式。第一SL资源为用于SL传输的资源，例如为用于发送该SL MAC CE的SL资源。可理解为，如果第一SL资源所在的载波包括该SL MAC CE对应的载波，那么该SL MAC CE在第一SL资源上传输，第二UE根据第一SL资源就能确定该SL MAC CE对应的载波，而不必再在该SL MAC CE中指示该SL MAC CE所对应的资源，因此在这种情况下，该SL MAC CE可采用第一格式。而如果第一SL资源所在的载波不包括该SL MAC CE对应的载波，那么该SL MAC CE在第一SL资源上传输，第二UE根据第一SL资源可能无法确定该SL MAC CE对应的载波，因此可以在该SL MAC CE中指示该SL MAC CE所对应的资源，则在这种情况下，该SL MAC CE可采用第二格式。
或者，第一UE根据载波信息确定SL MAC CE的格式为第一格式或第二格式，例如另一种方式为，如果第一SL资源所在的载波与该SL MAC CE对应的载波为同一载波，则该SL MAC CE的格式为第一格式，否则，如果第一SL资源所在的载波与该SL MAC CE对应的载波为不同的载波，则该SL MAC CE的格式为第二格式。可理解为，如果第一SL资源所在的载波与该SL MAC CE对应的载波为同一载波，那么该SL MAC CE在第一SL资源上传输，第二UE根据第一SL资源就能确定该SL MAC CE对应的载波，而不必再在该SL MAC CE中指示该SL MAC CE所对应的资源，因此在这种情况下，该SL MAC CE可采用第一格式。而如果第一SL资源所在的载波与该SL MAC CE对应的载波为不同的载波，那么该SL MAC CE在第一SL资源上传输，第二UE根据第一SL资源可能无法确定该SL MAC CE对应的载波，因此可以在该SL MAC CE中指示该SL MAC CE所对应的资源，则在这种情况下，该SL MAC CE可采用第二格式。
或者，第一UE根据载波信息确定SL MAC CE的格式为第一格式或第二格式，例如又一种方式为，如果第一UE与第二UE之间用于通信的载波的数量为1，则该SL MAC CE的格式为第一格式，否则，如果第一UE与第二UE之间用于通信的载波的数量大于1，则该SL MAC CE的格式为第二格式。可理解为，如果第一UE与第二UE之间是单载波通信，则该SL MAC CE在第一SL资源上传输，第二UE自然能够明确该SL MAC CE是对应于第一SL资源所在的载波，而不必再在该SL MAC CE中指示该SL MAC CE所对应的资源，因此在这种情况下，该SL MAC CE可采用第一格式。而如果第一UE与第二UE之间是多载波通信，那么该SL MAC CE在第一SL资源上传输，第二UE根据第一SL资源可能无法确定该SL MAC CE对应的载波，因此可以在该SL MAC CE中指示该SL MAC CE所对应的资源，则在这种情况下，该SL MAC CE可采用第二格式。
可选的，第一UE根据载波信息确定SL MAC CE格式的如上三种方式中的任意两种或三种也可以结合。例如，如果第一UE与第二UE之间用于通信的载波的数量大于1，则第一UE可以直接确定该SL MAC CE的格式为第二格式，或者也可以结合前两种方式中的任一种方式来确定该SL MAC CE的格式。例如，如果第一SL资源所在的载波包括该SL MAC CE对应的载波，则该SL MAC CE的格式为第一格式，否则，如果第一SL资源所在的载波不包括该SL MAC CE对应的载波，则该SL MAC CE的格式为第二格式。又例如，如果第一SL资源所在的载波与该SL MAC CE对应的载波为同一载波，则该SL MAC CE的格式为第一格式，否则，如果第一SL资源所在的载波与该SL MAC CE对应的载波为不同的载波，则该SL MAC CE的格式为第二格式。
除此之外，第一UE还可能采用其他方式来确定SL MAC CE的格式，对此不做限制。另外，关于SL MAC CE包括的信息，以及该SL MAC CE对应的资源等内容，可参考图4所示的实施例或图6所示的实施例的相关介绍。
可选的，该方法还可以包括S802，第一UE发送该SL MAC CE。相应的，第二UE接收来自第一UE的该SL MAC CE。如果该SL MAC CE的格式为第二格式，则第二UE可以获得该SL MAC CE包括的该SL MAC CE对应的资源的信息，从而确定该SL MAC CE对应的资源。或者，如果该SL MAC CE的格式为第一格式，则该SL MAC CE不包括该SL MAC CE对应的资源的信息。可选的，如果该SL MAC CE的格式为第一格式，则第二UE可以根据接收该SL MAC CE的载波确定该SL MAC CE对应的资源的信息，对此可参考图4所示的实施例或图5所示的实施例的介绍；或者，如果该SL MAC CE的格式为第一格式，且第一UE与第二UE之间是通过单载波进行通信，则第二UE能够确定该SL MAC CE对应于该载波。
本申请实施例中，第一UE可以根据相应的方式确定SL MAC CE的格式，使得SL MAC CE能够采用更为合适的格式。可选的，第二UE也可以采用与第一UE相同的方式确定SL MAC CE的格式， 因此第一UE与第二UE对于SL MAC CE的格式可以有相同的理解，减少了指示错误的概率。
图8所示的实施例可以与图4所示的实施例(或图5所示的实施例)结合，也可以与图6所示的实施例结合。例如在图4所示的实施例或图5所示的实施例中，第一UE可以根据图8所示的实施例提供的方式来确定SL MAC CE的格式为第一格式。例如在图4所示的实施例中，第一UE可以在执行SL LCP之前根据图8所示的实施例提供的方式确定SL MAC CE的格式，例如第一UE可以在S401之前确定SL MAC CE的格式，则从S401开始所涉及的SL MAC CE均采用该格式；或者，第一UE可以在S401中或者S401之后确定SL MAC CE的格式，例如第一UE在S401中或者S401之后可以确定至少一个SL MAC CE的格式为第一格式或第二格式；或者，第一UE也可以在SL LCP的过程中确定SL MAC CE的格式，例如在S402中、S402之后、S403中、S403之后、S404中、S404之后、S405中、或S405之后确定第一SL MAC CE的格式为第一格式或第二格式等；或者，第一UE也可以在SL LCP的过程结束后确定SL MAC CE的格式。
在图5所示的实施例中，第一UE也可以根据图8所示的实施例提供的方式来确定SL MAC CE的格式为第二格式。例如在图5所示的实施例中，第一UE可以在执行SL LCP之前根据图8所示的实施例提供的方式确定SL MAC CE的格式，例如第一UE可以在S501之前确定SL MAC CE的格式，则从S501开始所涉及的SL MAC CE均采用该格式；或者，第一UE可以在S501中或者S501之后确定SL MAC CE的格式；或者，第一UE也可以在SL LCP的过程中确定SL MAC CE的格式，例如在S502中、S502之后、S503中、S503之后、S504中、或S504之后确定第一SL MAC CE的格式为第一格式或第二格式等；或者，第一UE也可以在SL LCP的过程结束后确定SL MAC CE的格式。
在图6所示的实施例中，第一UE也可以根据图8所示的实施例提供的方式来确定SL MAC CE的格式为第二格式。例如在图6所示的实施例中，第一UE可以在S601之前根据图8所示的实施例提供的方式确定SL MAC CE的格式，则从S601开始所涉及的SL MAC CE均采用该格式；或者，第一UE也可以在S601中、S601之后、S602中、或S602之后确定第一SL MAC CE的格式为第一格式或第二格式等。
或者，图8所示的实施例与前述实施例均不结合，而是单独应用。
图9给出了本申请实施例提供的一种通信装置的结构示意图。所述通信装置900可以是图4、图5、图6或图8所示的实施例中的任一个实施例所述的第一UE或该第一UE的电路系统，用于实现上述方法实施例中对应于第一UE的方法。具体的功能可以参见上述方法实施例中的说明。其中，例如一种电路系统为芯片系统。
该通信装置900包括至少一个处理器901。处理器901可以用于装置的内部处理，实现一定的控制处理功能。可选地，处理器901包括指令。可选地，处理器901可以存储数据。可选地，不同的处理器可以是独立的器件，可以位于不同物理位置，可以位于不同的集成电路上。可选地，不同的处理器可以集成在一个或多个处理器中，例如，集成在一个或多个集成电路上。
可选地，通信装置900包括一个或多个存储器903，用以存储指令。可选地，所述存储器903中还可以存储有数据。所述处理器和存储器可以单独设置，也可以集成在一起。
可选地，通信装置900包括通信线路902，以及至少一个通信接口904。其中，因为存储器903、通信线路902以及通信接口904均为可选项，因此在图9中均以虚线表示。
可选地，通信装置900还可以包括收发器和/或天线。其中，收发器可以用于向其他装置发送信息或从其他装置接收信息。所述收发器可以称为收发机、收发电路、输入输出接口等，用于通过天线实现通信装置900的收发功能。可选地，收发器包括发射机(transmitter)和接收机(receiver)。示例性地，发射机可以用于将基带信号生成射频(radio frequency)信号，接收机可以用于将射频信号转换为基带信号。
处理器901可以包括一个通用中央处理器(central processing unit，CPU)，微处理器，特定应用集成电路(application specific integrated circuit，ASIC)，或一个或多个用于控制本申请方案程序执行的集成电路。
通信线路902可包括一通路，在上述组件之间传送信息。
通信接口904，使用任何收发器一类的装置，用于与其他设备或通信网络通信，如以太网，无线接入网(radio access network，RAN)，无线局域网(wireless local area networks，WLAN)，有线接入网等。
存储器903可以是只读存储器(read-only memory，ROM)或可存储静态信息和指令的其他类型的 静态存储设备，随机存取存储器(random access memory，RAM)或者可存储信息和指令的其他类型的动态存储设备，也可以是电可擦可编程只读存储器(electrically erasable programmable read-only memory，EEPROM)、只读光盘(compact disc read-only memory，CD-ROM)或其他光盘存储、光碟存储(包括压缩光碟、激光碟、光碟、数字通用光碟、蓝光光碟等)、磁盘存储介质或者其他磁存储设备、或者能够用于携带或存储具有指令或数据结构形式的期望的程序代码并能够由计算机存取的任何其他介质，但不限于此。存储器903可以是独立存在，通过通信线路902与处理器901相连接。或者，存储器903也可以和处理器901集成在一起。
其中，存储器903用于存储执行本申请方案的计算机执行指令，并由处理器901来控制执行。处理器901用于执行存储器903中存储的计算机执行指令，从而实现图4、图5、图6或图8所示的实施例中的任一个实施例所述的第一UE所执行的步骤。
可选的，本申请实施例中的计算机执行指令也可以称之为应用程序代码，本申请实施例对此不作具体限定。
在具体实现中，作为一种实施例，处理器901可以包括一个或多个CPU，例如图9中的CPU0和CPU1。
在具体实现中，作为一种实施例，通信装置900可以包括多个处理器，例如图9中的处理器901和处理器905。这些处理器中的每一个可以是一个单核(single-CPU)处理器，也可以是一个多核(multi-CPU)处理器。这里的处理器可以指一个或多个设备、电路、和/或用于处理数据(例如计算机程序指令)的处理核。
当图9所示的装置为芯片时，例如是第一UE的芯片，则该芯片包括处理器901(还可以包括处理器905)、通信线路902和通信接口904，可选的，该可包括存储器903。具体地，通信接口904可以是输入接口、管脚或电路等。存储器903可以是寄存器、缓存等。处理器901和处理器905可以是一个通用的CPU，微处理器，ASIC，或一个或多个用于控制上述任一实施例的通信方法的程序执行的集成电路。
本申请实施例可以根据上述方法示例对装置进行功能模块的划分，例如，可以对应各个功能划分各个功能模块，也可以将两个或两个以上的功能集成在一个处理模块中。上述集成的模块既可以采用硬件的形式实现，也可以采用软件功能模块的形式实现。需要说明的是，本申请实施例中对模块的划分是示意性的，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。比如，在采用对应各个功能划分各个功能模块的情况下，图10为一种装置的示意图，该装置1000可以是上述各个方法实施例中所涉及的第一UE，或者为第一UE中的芯片。该装置1000包括发送单元1001、处理单元1002和接收单元1003。
应理解，该装置1000可以用于实现本申请实施例的通信方法中由第一UE执行的步骤，相关特征可以参照上文图4、图5、图6或图8所示实施例中的任一个实施例，此处不再赘述。
可选的，图10中的发送单元1001、接收单元1003以及处理单元1002的功能/实现过程可以通过图9中的处理器901调用存储器903中存储的计算机执行指令来实现。或者，图10中的处理单元1002的功能/实现过程可以通过图9中的处理器901调用存储器903中存储的计算机执行指令来实现，图10中的发送单元1001和接收单元1003的功能/实现过程可以通过图9中的通信接口904来实现。
可选的，当该装置1000是芯片或电路时，则发送单元1001和接收单元1003的功能/实现过程还可以通过管脚或电路等来实现。
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计算机程序或指令，当该计算机程序或指令被运行时，实现前述方法实施例中由第一UE所执行的方法。这样，上述实施例中所述功能可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。基于这样的理解，本申请的技术方案本质上或者说对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。存储介质包括：U盘、移动硬盘、ROM、RAM、磁碟或者光盘等各种可以存储程序代码的介质。
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，使得该计算机执行前述任一方法实施例中由第一UE所执行的方法。
本申请实施例还提供一种芯片系统，包括：处理器，可用于以执行上述方法实施例中由第一UE执 行的操作。
本申请实施例还提供一种通信系统，包括上述方法实施例中的第一UE。可选的，该通信系统还可以包括上述方法实施例中的第二UE和/或接入网设备。
在上述实施例中，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。在计算机上加载和执行所述计算机程序指令时，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。
本申请实施例中所描述的各种说明性的逻辑单元和电路可以通过通用处理器，数字信号处理器(digital signal processor，DSP)，专用集成电路(application specific integrated circuit，ASIC)，现场可编程门阵列(field-programmable gate array，FPGA)，或其它可编程逻辑装置，离散门或晶体管逻辑，离散硬件部件，或上述任何组合的设计来实现或操作所描述的功能。通用处理器可以为微处理器，可选地，该通用处理器也可以为任何传统的处理器、控制器、微控制器或状态机。处理器也可以通过计算装置的组合来实现，例如数字信号处理器和微处理器，多个微处理器，一个或多个微处理器联合一个数字信号处理器核，或任何其它类似的配置来实现。
本申请实施例中所描述的方法或算法的步骤可以直接嵌入硬件、处理器执行的软件单元、或者这两者的结合。软件单元可以存储于RAM、闪存、ROM、可擦除可编程只读存储器(erasable programmable read-only memory，EPROM)、EEPROM、寄存器、硬盘、可移动磁盘、CD-ROM或本领域中其它任意形式的存储媒介中。示例性地，存储媒介可以与处理器连接，以使得处理器可以从存储媒介中读取信息，并可以向存储媒介存写信息。可选地，存储媒介还可以集成到处理器中。处理器和存储媒介可以设置于ASIC中，ASIC可以设置于终端设备中。可选地，处理器和存储媒介也可以设置于终端设备中的不同的部件中。
这些计算机程序指令也可装载到计算机或其他可编程数据处理设备上，使得在计算机或其他可编程设备上执行一系列操作步骤以产生计算机实现的处理，从而在计算机或其他可编程设备上执行的指令提供用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的步骤。
本申请的各个实施例中的内容可以相互参考，如果没有特殊说明以及逻辑冲突，不同的实施例之间的术语和/或描述具有一致性、且可以相互引用，不同的实施例中的技术特征根据其内在的逻辑关系可以组合形成新的实施例。
可以理解的，本申请实施例中，第一UE可以执行本申请实施例中的部分或全部步骤，这些步骤或操作仅是示例，本申请实施例中，还可以执行其它操作或者各种操作的变形。此外，各个步骤可以按照本申请实施例呈现的不同的顺序来执行，并且有可能并非要执行本申请实施例中的全部操作。

Claims (63)

  1. 一种通信方法，其特征在于，所述方法包括：
    根据载波信息确定至少一个侧行控制元素，所述载波信息包括所述至少一个侧行控制元素对应的载波的信息，所述至少一个侧行控制元素中的每个侧行控制元素为介质接入控制控制元素；
    根据所述至少一个侧行控制元素确定第一目的地址；
    根据所述第一目的地址确定第一逻辑信道和/或第一侧行控制元素。
  2. 根据权利要求1所述的方法，其特征在于，所述第一侧行控制元素属于所述至少一个侧行控制元素。
  3. 根据权利要求1或2所述的方法，其特征在于，根据载波信息确定至少一个侧行控制元素，包括：
    根据所述载波信息以及第一侧行资源确定所述至少一个侧行控制元素，所述第一侧行资源为用于侧行传输的资源。
  4. 根据权利要求3所述的方法，其特征在于，根据所述载波信息以及第一侧行资源确定所述至少一个侧行控制元素，包括：
    确定所述第一侧行资源所在的载波包括所述至少一个侧行控制元素对应的载波；和/或，
    确定所述至少一个侧行控制元素对应的载波与所述第一侧行资源所在的载波为同一载波。
  5. 根据权利要求1～4任一项所述的方法，其特征在于，所述至少一个侧行控制元素中包括第二侧行控制元素，其中，
    所述第二侧行控制元素对应的载波为用于传输侧行控制信息SCI的载波；或，
    所述第二侧行控制元素对应的载波为SCI调度的侧行传输所在的载波；
    其中，所述SCI用于指示所述第一终端设备发送侧行信道状态信息CSI报告，所述侧行CSI报告包括在所述第二侧行控制元素中。
  6. 根据权利要求1～4任一项所述的方法，其特征在于，所述至少一个侧行控制元素中包括第二侧行控制元素，其中，
    所述第二侧行控制元素对应的载波为用户设备间协作IUC信息关联的资源池所在的载波；或，
    所述第二侧行控制元素对应的载波为IUC信息指示的侧行资源所在的资源池所在的载波；或，
    所述第二侧行控制元素对应的载波为用于传输IUC信息的载波；
    其中，所述IUC信息包括在所述第二侧行控制元素中。
  7. 根据权利要求1～4任一项所述的方法，其特征在于，所述至少一个侧行控制元素中包括第二侧行控制元素，其中，
    所述第二侧行控制元素对应的载波为所述IUC请求关联的资源池所在的载波；或，
    所述第二侧行控制元素对应的载波为所述IUC请求指示的侧行资源所在的资源池所在的载波；或，
    所述第二侧行控制元素对应的载波为用于传输所述IUC请求的载波；
    其中，所述IUC请求包括在所述第二侧行控制元素中，所述IUC请求用于请求所述第二侧行控制元素的接收端发送IUC信息。
  8. 根据权利要求1～7任一项所述的方法，其特征在于，根据所述至少一个侧行控制元素确定第一目的地址，包括：
    根据所述至少一个侧行控制元素的优先级确定所述第一目的地址。
  9. 根据权利要求8所述的方法，其特征在于，根据所述至少一个侧行控制元素的优先级确定所述第一目的地址，包括：
    根据所述至少一个侧行控制元素的优先级以及待发送的逻辑信道的优先级确定所述第一目的地址。
  10. 根据权利要求1～9任一项所述的方法，其特征在于，所述方法还包括：
    将第一侧行资源分配给所述第一逻辑信道和/或所述第一侧行控制元素，所述第一侧行资源为用于侧行传输的资源；
    发送所述第一逻辑信道和/或所述第一侧行控制元素。
  11. 根据权利要求1～10任一项所述的方法，其特征在于，所述方法还包括：
    执行载波重选或载波选择，以重新确定载波。
  12. 根据权利要求11所述的方法，其特征在于，所述重新确定的载波包括所述至少一个侧行控制元 素对应的载波。
  13. 根据权利要求11或12所述的方法，其特征在于，所述载波重选或选择过程在第一时长内完成，所述第一时长为第一计时器对应的时长，所述第一计时器用于指示一个侧行控制元素的有效期。
  14. 根据权利要求11或12所述的方法，其特征在于，所述载波重选或选择过程在第二时长完成，所述第二时长为第二计时器对应的时长，所述第二计时器对应的时长大于第一计时器对应的时长，所述第一计时器用于指示一个侧行控制元素的有效期。
  15. 根据权利要求1～14任一项所述的方法，其特征在于，所述方法还包括：
    根据所述载波信息确定所述第一侧行控制元素的格式为第一格式，在所述第一格式下，所述第一侧行控制元素不包括所述第一侧行控制元素对应的资源的信息。
  16. 一种通信方法，其特征在于，所述方法包括：
    根据待发送的逻辑信道和/或侧行控制元素确定第一目的地址；
    根据载波信息从所述第一目的地址关联的侧行控制元素中确定第一侧行控制元素，其中，所述载波信息包括所述第一侧行控制元素对应的载波信息，所述第一侧行控制元素为介质接入控制控制元素。
  17. 根据权利要求16所述的方法，其特征在于，根据载波信息从所述第一目的地址关联的侧行控制元素中确定第一侧行控制元素，包括：
    根据所述载波信息以及第一侧行资源，从所述第一目的地址关联的侧行控制元素中确定所述第一侧行控制元素。
  18. 根据权利要求17所述的方法，其特征在于，根据所述载波信息以及第一侧行资源，从所述第一目的地址关联的侧行控制元素中确定所述第一侧行控制元素，包括：
    确定所述第一侧行资源所在的载波包括所述第一侧行控制元素对应的载波；和/或，
    确定所述第一侧行控制元素对应的载波与所述第一侧行资源所在的载波为同一载波。
  19. 根据权利要求16～18任一项所述的方法，其特征在于，
    所述第一侧行控制元素对应的载波为用于传输SCI的载波；或，
    所述第一侧行控制元素对应的载波为SCI调度的侧行传输所在的载波；
    其中，所述SCI用于指示所述第一终端设备发送侧行CSI报告，所述侧行CSI报告包括在所述第一侧行控制元素中。
  20. 根据权利要求16～18任一项所述的方法，其特征在于，
    所述第一侧行控制元素对应的载波为IUC信息关联的资源池所在的载波；或，
    所述第一侧行控制元素对应的载波为IUC信息指示的侧行资源所在的资源池所在的载波；或，
    所述第一侧行控制元素对应的载波为用于传输IUC信息的载波；
    其中，所述IUC信息包括在所述第一侧行控制元素中。
  21. 根据权利要求16～18任一项所述的方法，其特征在于，
    所述第一侧行控制元素对应的载波为所述IUC请求关联的资源池所在的载波；或，
    所述第一侧行控制元素对应的载波为所述IUC请求指示的侧行资源所在的资源池所在的载波；或，
    所述第一侧行控制元素对应的载波为用于传输所述IUC请求的载波；
    其中，所述IUC请求包括在所述第一侧行控制元素中，所述IUC请求用于请求所述第一侧行控制元素的接收端发送IUC信息。
  22. 根据权利要求16～21任一项所述的方法，其特征在于，根据待发送的逻辑信道和/或侧行控制元素确定第一目的地址，包括：
    根据所述待发送的逻辑信道和/或侧行控制元素的优先级确定所述第一目的地址。
  23. 根据权利要求16～22任一项所述的方法，其特征在于，所述方法还包括：
    将第一侧行资源分配给所述第一侧行控制元素，所述第一侧行资源为用于侧行传输的资源；
    发送所述第一侧行控制元素。
  24. 根据权利要求16～23任一项所述的方法，其特征在于，所述方法还包括：
    执行载波重选或载波选择，以重新确定载波。
  25. 根据权利要求24所述的方法，其特征在于，所述重新确定的载波包括所述第一侧行控制元素对应的载波。
  26. 根据权利要求24或25所述的方法，其特征在于，所述载波重选或选择过程在第一时长内完成， 所述第一时长为第一计时器对应的时长，所述第一计时器用于指示所述第一侧行控制元素的有效期。
  27. 根据权利要求24或25所述的方法，其特征在于，所述载波重选或选择过程在第二时长完成，所述第二时长为第二计时器对应的时长，所述第二计时器对应的时长大于第一计时器对应的时长，所述第一计时器用于指示所述第一侧行控制元素的有效期。
  28. 根据权利要求16～27任一项所述的方法，其特征在于，所述方法还包括：
    根据所述载波信息确定所述第一侧行控制元素的格式为第二格式，在所述第二格式下，所述第一侧行控制元素包括所述第一侧行控制元素对应的资源的信息。
  29. 一种通信装置，其特征在于，包括：
    处理单元，用于根据载波信息确定至少一个侧行控制元素，所述载波信息包括所述至少一个侧行控制元素对应的载波的信息，所述至少一个侧行控制元素中的每个侧行控制元素为介质接入控制控制元素；
    所述处理单元，还用于根据所述至少一个侧行控制元素确定第一目的地址；
    所述处理单元，还用于根据所述第一目的地址确定第一逻辑信道和/或第一侧行控制元素。
  30. 根据权利要求29所述的通信装置，其特征在于，所述第一侧行控制元素属于所述至少一个侧行控制元素。
  31. 根据权利要求29或30所述的通信装置，其特征在于，所述处理单元用于通过如下方式根据载波信息确定至少一个侧行控制元素：
    根据所述载波信息以及第一侧行资源确定所述至少一个侧行控制元素，所述第一侧行资源为用于侧行传输的资源。
  32. 根据权利要求31所述的通信装置，其特征在于，所述处理单元用于通过如下方式根据所述载波信息以及第一侧行资源确定所述至少一个侧行控制元素：
    确定所述第一侧行资源所在的载波包括所述至少一个侧行控制元素对应的载波；和/或，
    确定所述至少一个侧行控制元素对应的载波与所述第一侧行资源所在的载波为同一载波。
  33. 根据权利要求29～32任一项所述的通信装置，其特征在于，所述至少一个侧行控制元素中包括第二侧行控制元素，其中，
    所述第二侧行控制元素对应的载波为用于传输侧行控制信息SCI的载波；或，
    所述第二侧行控制元素对应的载波为SCI调度的侧行传输所在的载波；
    其中，所述SCI用于指示所述第一终端设备发送侧行信道状态信息CSI报告，所述侧行CSI报告包括在所述第二侧行控制元素中。
  34. 根据权利要求29～32任一项所述的通信装置，其特征在于，所述至少一个侧行控制元素中包括第二侧行控制元素，其中，
    所述第二侧行控制元素对应的载波为用户设备间协作IUC信息关联的资源池所在的载波；或，
    所述第二侧行控制元素对应的载波为IUC信息指示的侧行资源所在的资源池所在的载波；或，
    所述第二侧行控制元素对应的载波为用于传输IUC信息的载波；
    其中，所述IUC信息包括在所述第二侧行控制元素中。
  35. 根据权利要求29～32任一项所述的通信装置，其特征在于，所述至少一个侧行控制元素中包括第二侧行控制元素，其中，
    所述第二侧行控制元素对应的载波为所述IUC请求关联的资源池所在的载波；或，
    所述第二侧行控制元素对应的载波为所述IUC请求指示的侧行资源所在的资源池所在的载波；或，
    所述第二侧行控制元素对应的载波为用于传输所述IUC请求的载波；
    其中，所述IUC请求包括在所述第二侧行控制元素中，所述IUC请求用于请求所述第二侧行控制元素的接收端发送IUC信息。
  36. 根据权利要求29～35任一项所述的通信装置，其特征在于，所述处理单元用于通过如下方式根据所述至少一个侧行控制元素确定第一目的地址：
    根据所述至少一个侧行控制元素的优先级确定所述第一目的地址。
  37. 根据权利要求36所述的通信装置，其特征在于，所述处理单元用于通过如下方式根据所述至少一个侧行控制元素的优先级确定所述第一目的地址：
    根据所述至少一个侧行控制元素的优先级以及待发送的逻辑信道的优先级确定所述第一目的地址。
  38. 根据权利要求29～37任一项所述的通信装置，其特征在于，所述通信装置还包括发送单元，
    所述处理单元，还用于将第一侧行资源分配给所述第一逻辑信道和/或所述第一侧行控制元素，所述第一侧行资源为用于侧行传输的资源；
    所述发送单元，用于发送所述第一逻辑信道和/或所述第一侧行控制元素。
  39. 根据权利要求29～38任一项所述的通信装置，其特征在于，所述处理单元，还用于执行载波重选或载波选择，以重新确定载波。
  40. 根据权利要求39所述的通信装置，其特征在于，所述重新确定的载波包括所述至少一个侧行控制元素对应的载波。
  41. 根据权利要求39或40所述的通信装置，其特征在于，所述载波重选或选择过程在第一时长内完成，所述第一时长为第一计时器对应的时长，所述第一计时器用于指示一个侧行控制元素的有效期。
  42. 根据权利要求39或40所述的通信装置，其特征在于，所述载波重选或选择过程在第二时长完成，所述第二时长为第二计时器对应的时长，所述第二计时器对应的时长大于第一计时器对应的时长，所述第一计时器用于指示一个侧行控制元素的有效期。
  43. 根据权利要求29～42任一项所述的通信装置，其特征在于，所述处理单元，还用于根据所述载波信息确定所述第一侧行控制元素的格式为第一格式，在所述第一格式下，所述第一侧行控制元素不包括所述第一侧行控制元素对应的资源的信息。
  44. 一种通信装置，其特征在于，包括：
    处理单元，用于根据待发送的逻辑信道和/或侧行控制元素确定第一目的地址；
    所述处理单元，还用于根据载波信息从所述第一目的地址关联的侧行控制元素中确定第一侧行控制元素，其中，所述载波信息包括所述第一侧行控制元素对应的载波信息，所述第一侧行控制元素为介质接入控制控制元素。
  45. 根据权利要求44所述的通信装置，其特征在于，所述处理单元用于通过如下方式根据载波信息从所述第一目的地址关联的侧行控制元素中确定第一侧行控制元素：
    根据所述载波信息以及第一侧行资源，从所述第一目的地址关联的侧行控制元素中确定所述第一侧行控制元素。
  46. 根据权利要求45所述的通信装置，其特征在于，所述处理单元用于通过如下方式根据所述载波信息以及第一侧行资源，从所述第一目的地址关联的侧行控制元素中确定所述第一侧行控制元素：
    确定所述第一侧行资源所在的载波包括所述第一侧行控制元素对应的载波；和/或，
    确定所述第一侧行控制元素对应的载波与所述第一侧行资源所在的载波为同一载波。
  47. 根据权利要求44～46任一项所述的通信装置，其特征在于，
    所述第一侧行控制元素对应的载波为用于传输SCI的载波；或，
    所述第一侧行控制元素对应的载波为SCI调度的侧行传输所在的载波；
    其中，所述SCI用于指示所述第一终端设备发送侧行CSI报告，所述侧行CSI报告包括在所述第一侧行控制元素中。
  48. 根据权利要求44～46任一项所述的通信装置，其特征在于，
    所述第一侧行控制元素对应的载波为IUC信息关联的资源池所在的载波；或，
    所述第一侧行控制元素对应的载波为IUC信息指示的侧行资源所在的资源池所在的载波；或，
    所述第一侧行控制元素对应的载波为用于传输IUC信息的载波；
    其中，所述IUC信息包括在所述第一侧行控制元素中。
  49. 根据权利要求44～46任一项所述的通信装置，其特征在于，
    所述第一侧行控制元素对应的载波为所述IUC请求关联的资源池所在的载波；或，
    所述第一侧行控制元素对应的载波为所述IUC请求指示的侧行资源所在的资源池所在的载波；或，
    所述第一侧行控制元素对应的载波为用于传输所述IUC请求的载波；
    其中，所述IUC请求包括在所述第一侧行控制元素中，所述IUC请求用于请求所述第一侧行控制元素的接收端发送IUC信息。
  50. 根据权利要求44～49任一项所述的通信装置，其特征在于，所述处理单元用于通过如下方式根据待发送的逻辑信道和/或侧行控制元素确定第一目的地址：
    根据所述待发送的逻辑信道和/或侧行控制元素的优先级确定所述第一目的地址。
  51. 根据权利要求44～50任一项所述的通信装置，其特征在于，所述通信装置还包括发送单元，
    所述处理单元，还用于将第一侧行资源分配给所述第一侧行控制元素，所述第一侧行资源为用于侧行传输的资源；
    所述发送单元，用于发送所述第一侧行控制元素。
  52. 根据权利要求44～51任一项所述的通信装置，其特征在于，所述处理单元，还用于执行载波重选或载波选择，以重新确定载波。
  53. 根据权利要求52所述的通信装置，其特征在于，所述重新确定的载波包括所述第一侧行控制元素对应的载波。
  54. 根据权利要求52或53所述的通信装置，其特征在于，所述载波重选或选择过程在第一时长内完成，所述第一时长为第一计时器对应的时长，所述第一计时器用于指示所述第一侧行控制元素的有效期。
  55. 根据权利要求52或53所述的通信装置，其特征在于，所述载波重选或选择过程在第二时长完成，所述第二时长为第二计时器对应的时长，所述第二计时器对应的时长大于第一计时器对应的时长，所述第一计时器用于指示所述第一侧行控制元素的有效期。
  56. 根据权利要求44～55任一项所述的通信装置，其特征在于，所述处理单元，还用于根据所述载波信息确定所述第一侧行控制元素的格式为第二格式，在所述第二格式下，所述第一侧行控制元素包括所述第一侧行控制元素对应的资源的信息。
  57. 一种通信装置，其特征在于，包括：处理器；所述处理器用于执行存储器存储的一个或多个计算机程序，以使得所述通信装置执行如权利要求1～15中任一项所述的方法，或使得所述通信装置执行如权利要求16～28中任一项所述的方法。
  58. 根据权利要求57所述的通信装置，其特征在于，所述通信装置还包括所述存储器。
  59. 一种通信装置，其特征在于，包括用于执行如权利要求1～15中任一项所述方法的模块，或者包括用于执行如权利要求16～28中任一项所述方法的模块。
  60. 一种芯片系统，其特征在于，所述芯片系统包括逻辑电路和输入输出接口，其中，所述输入输出接口用于与所述芯片系统之外的其他通信装置进行通信，所述逻辑电路用于执行如权利要求1～15中任一项所述的方法，或者，所述逻辑电路用于执行如权利要求16～28中任一项所述的方法。
  61. 一种通信系统，其特征在于，包括用于执行如权利要求1～15中任一项所述方法的第一终端设备，或包括用于执行如权利要求16～28中任一项所述方法的第一终端设备。
  62. 一种计算机可读存储介质，其特征在于，所述计算机可读存储介质用于存储计算机程序，当所述计算机程序在计算机上运行时，使得所述计算机执行如权利要求1～15中任一项所述的方法，或使得所述计算机执行如权利要求16～28中任一项所述的方法。
  63. 一种计算机程序产品，其特征在于，所述计算机程序产品包括计算机程序，当所述计算机程序在计算机上运行时，使得所述计算机执行如权利要求1～15中任一项所述的方法，或使得所述计算机执行如权利要求16～28中任一项所述的方法。
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