Side link communication method, terminal and storage medium

Abstract

The present disclosure relates to a sidelink communication method, a terminal and a storage medium, the sidelink communication method comprising: using a first power to send sidelink feedback channels (PSFCHs) corresponding to a plurality of carriers, the PSFCHs of at least part of the carriers in the PSFCHs corresponding to the plurality of carriers having time domain overlap, and the first power being less than or equal to a preset first maximum sending power. According to the method and the device, the PSFCHs corresponding to the plurality of carriers can be sent through the first power, so that a corresponding number of PSFCHs can be sent according to proper power in a carrier aggregation scene, and the side link communication efficiency is improved.

Description

Side link communication method, terminal and storage medium

[0001] The present disclosure relates to the field of communication technology, and in particular to a side link communication method, a terminal, and a storage medium.

[0002] In the related art, there is a situation where the transmission of physical sidelink control channels (PSCCH) or physical sidelink shared channels (PSSCH) of multiple carriers overlaps in the time domain, wherein only one PSCCH or PSSCH is transmitted on each carrier.

[0003]

[0004] In the scenario of sidelink carrier aggregation in 5G communications, when the physical sidelink feedback channel (PSFCH) sent on different carriers overlaps in the time domain, it is currently unclear how to implement power control on the PSFCHs sent on different carriers.

[0005] The embodiments of the present disclosure provide a side link communication method, a terminal, and a storage medium.

[0006] According to a first aspect of an embodiment of the present disclosure, a side link communication method is proposed, the method comprising: using a first power to send a side link feedback channel PSFCH corresponding to multiple carriers, wherein there is a time domain overlap between the PSFCHs of at least some carriers among the PSFCHs corresponding to the multiple carriers, and the first power is less than or equal to a pre-set first maximum transmission power.

[0007] According to the second aspect of an embodiment of the present disclosure, a side link communication method is proposed, the method comprising: receiving a side link feedback channel PSFCH corresponding to multiple carriers transmitted using a first power, wherein there is a time domain overlap between the PSFCHs of at least some carriers among the PSFCHs corresponding to the multiple carriers, and the first power is less than or equal to a pre-set first maximum transmission power.

[0008] According to the third aspect of an embodiment of the present disclosure, a side link communication method is proposed, the method comprising: a first terminal sends a side link feedback channel PSFCH corresponding to multiple carriers using a first power, wherein there is a time domain overlap between the PSFCHs of at least some carriers among the PSFCHs corresponding to the multiple carriers, and the first power is less than or equal to a pre-set first maximum transmission power; and a second terminal receives the PSFCHs corresponding to the multiple carriers sent by the first terminal using the first power.

[0009] According to the fourth aspect of an embodiment of the present disclosure, a first terminal is proposed, comprising: a transceiver module; the transceiver module is used to send a side link feedback channel PSFCH corresponding to multiple carriers using a first power, wherein there is a time domain overlap between the PSFCHs of at least some carriers among the PSFCHs corresponding to the multiple carriers, and the first power is less than or equal to a pre-set first maximum transmission power.

[0010] According to the fifth aspect of an embodiment of the present disclosure, a second terminal is proposed, comprising: a transceiver module; the transceiver module is used to receive a side link feedback channel PSFCH corresponding to multiple carriers transmitted using a first power, wherein there is a time domain overlap between the PSFCHs of at least some carriers among the PSFCHs corresponding to the multiple carriers, and the first power is less than or equal to a pre-set first maximum transmission power.

[0011] According to a sixth aspect of an embodiment of the present disclosure, a first terminal is proposed, comprising: one or more processors; wherein the first terminal is used to execute the first aspect and any one of the side link communication methods in the first aspect.

[0012] According to the seventh aspect of an embodiment of the present disclosure, a second terminal is proposed, comprising: one or more processors; wherein the second terminal is used to execute the second aspect and any one of the side link communication methods in the second aspect.

[0013] According to the eighth aspect of an embodiment of the present disclosure, a communication system is proposed, comprising a first terminal and a second terminal, wherein the first terminal is configured to implement the first aspect and any one of the side link communication methods in the first aspect, and the second terminal is configured to implement the second aspect and any one of the side link communication methods in the second aspect.

[0014] According to the ninth aspect of an embodiment of the present disclosure, a storage medium is proposed, which stores instructions. When the instructions are executed on a communication device, the communication device executes a side link communication method such as the first aspect and any one of the items in the first aspect or the second aspect and any one of the items in the second aspect.

[0015] The present disclosure can send PSFCHs corresponding to multiple carriers through a first power, thereby sending a corresponding number of PSFCHs according to an appropriate power in a carrier aggregation scenario, thereby improving the side link communication efficiency.

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the drawings required for describing the embodiments are introduced below. The following drawings are only some embodiments of the present disclosure and do not impose specific limitations on the protection scope of the present disclosure.

[0017] FIG1 is a schematic diagram of a communication system architecture according to an embodiment of the present disclosure.

[0018] FIG2 is a schematic diagram of an interaction of a side link communication method according to an embodiment of the present disclosure.

[0019] Fig. 3a is a flow chart of a side link communication method according to an exemplary embodiment.

[0020] Fig. 3b is a flow chart of another side link communication method according to an exemplary embodiment.

[0021] Fig. 4 is a flow chart of yet another side link communication method according to an exemplary embodiment.

[0022] Fig. 5 is a flow chart of yet another side link communication method according to an exemplary embodiment.

[0023] Fig. 6a is a schematic diagram of a side link communication device according to an exemplary embodiment.

[0024] Fig. 6b is a schematic diagram of another side link communication device according to an exemplary embodiment.

[0025] Fig. 7a is a schematic diagram of a communication device according to an exemplary embodiment.

[0026] Fig. 7b is a schematic diagram of a chip according to an exemplary embodiment.

[0027] The embodiments of the present disclosure provide a side link communication method, a terminal, and a storage medium.

[0028] In the first aspect, an embodiment of the present disclosure proposes a side link communication method, which is executed by a first terminal, and the method includes: using a first power to send a side link feedback channel PSFCH corresponding to multiple carriers, wherein there is a time domain overlap between the PSFCHs of at least some carriers among the PSFCHs corresponding to the multiple carriers, and the first power is less than or equal to a pre-set first maximum transmission power.

[0029] In the above embodiment, the PSFCHs corresponding to multiple carriers can be sent at the first power, so that a corresponding number of PSFCHs can be sent at an appropriate power in a carrier aggregation scenario, thereby improving the side link communication efficiency.

[0030] In combination with some embodiments of the first aspect, the PSFCHs corresponding to multiple carriers have y1 PSFCHs to be sent; the method also includes: if the total transmission power of the y1 PSFCHs to be sent is greater than a pre-set first maximum transmission power, power adjustment is performed on the y1 PSFCHs to be sent or the PSFCHs are discarded to obtain y2 PSFCHs, wherein the total transmission power of the y2 PSFCHs is the first power, and y2 is less than or equal to y1.

[0031] In the above embodiment, when the total transmission power of y1 PSFCHs to be transmitted exceeds the maximum transmission power, the power of y1 PSFCHs to be transmitted can be adjusted or discarded, so that the terminal can transmit a corresponding number of PSFCHs at an appropriate power in a carrier aggregation scenario, thereby improving the side link communication efficiency.

[0032] In combination with some embodiments of the first aspect, the method also includes: determining y3 PSFCHs to be sent, where y3 is greater than a first threshold; based on the priorities corresponding to the PSFCHs, discarding the PSFCHs with the lowest priority in turn from the y3 PSFCHs to be sent, to obtain y1 PSFCHs to be sent, where y1 is less than or equal to the first threshold.

[0033] In the above embodiment, when the number of PSFCHs that the terminal needs to send exceeds the first threshold, part of the PSFCHs can be discarded, so that the terminal can send a corresponding number of PSFCHs at an appropriate power in a carrier aggregation scenario, thereby improving the side link communication efficiency.

[0034] In combination with some embodiments of the first aspect, at least one bandwidth corresponding to sending PSFCH corresponds to a second threshold respectively, and the sum of the second thresholds corresponding to each bandwidth is equal to the first threshold, wherein the bandwidth includes at least one of a frequency band and a carrier, and each frequency band includes at least one carrier.

[0035] In the above embodiments, thresholds in various dimensions are provided to be applicable to various scenarios.

[0036] In combination with some embodiments of the first aspect, the second threshold is the maximum number of PSFCHs corresponding to the Rth bandwidth, where R is a positive integer; based on the priority corresponding to the PSFCH, the PSFCH with the lowest priority is discarded in turn from the y3 PSFCHs to be sent, and y1 PSFCHs to be sent are obtained, including: according to the priority corresponding to the PSFCH, the PSFCH with the lowest priority is discarded in turn from the PSFCHs to be sent corresponding to the Rth bandwidth, until the number of PSFCHs corresponding to the Rth bandwidth is less than or equal to the maximum number of PSFCHs corresponding to the Rth bandwidth, and y4 PSFCHs to be sent corresponding to the Rth bandwidth are obtained; wherein, among all the bandwidths occupied by sending PSFCH, the sum of y4 corresponding to each bandwidth is equal to y1.

[0037] In the above embodiment, the power of PSFCH can be adjusted and / or discarded for each bandwidth separately, so as to determine the appropriate power to send the corresponding number of PSFCHs on different bandwidths, thereby improving the side link communication efficiency.

[0038] In combination with some embodiments of the first aspect, the first threshold is determined based on terminal capabilities of the terminal itself.

[0039] In the above embodiment, the terminal can determine the first threshold for sending different bandwidths occupied by PSFCHs corresponding to multiple carriers according to its own terminal capabilities, so as to be applicable to terminals with different capabilities.

[0040] In combination with some embodiments of the first aspect, power adjustment or PSFCH discarding is performed on y1 PSFCHs to be sent, including: if the total transmission power of the PSFCH to be sent corresponding to the R-th bandwidth is greater than the second maximum transmission power corresponding to the R-th bandwidth, power adjustment or PSFCH discarding is performed on the PSFCH to be sent corresponding to the R-th bandwidth; wherein, in all bandwidths occupied by sending PSFCH, the sum of the second maximum transmission powers corresponding to each bandwidth is equal to the first maximum transmission power; the second maximum transmission power is based on high-level signaling configuration, or the second maximum transmission power is determined based on the total transmission power of the PSFCH to be sent corresponding to all bandwidths, the total transmission power of the PSFCH to be sent corresponding to the R-th bandwidth and the first maximum transmission power, and R is a positive integer.

[0041] In the above embodiment, power control may be performed for the corresponding maximum transmission power on different bandwidths, thereby implementing PSFCH power adjustment and / or discarding for different bandwidths to achieve more accurate side link communication.

[0042] In combination with some embodiments of the first aspect, the bandwidth includes a frequency band, and the total transmit power of the PSFCH corresponding to the Wth frequency band is determined based on the total transmit power of the PSFCH corresponding to each carrier in the Wth frequency band, where W is a positive integer.

[0043] In the above embodiment, a method for determining the total transmission power of a frequency band is provided, so as to transmit the PSFCH on the frequency band based on the transmission power, thereby improving the side link communication efficiency.

[0044] In combination with some embodiments of the first aspect, the method also includes: discarding all PSFCHs to be sent on a specific carrier, wherein the specific carrier is a carrier in the Wth frequency band that satisfies a first condition, and W is a positive integer; the first condition includes at least one of the following: restrictions on simultaneous transmission of multiple carriers; carrier combination requirements; and RF retuning time restrictions.

[0045] In the above embodiments, a plurality of ways to determine whether to discard the PSFCH to be sent on a specific carrier are provided, so as to be applicable to discarding the PSFCH to be sent on multiple carriers in a variety of different scenarios, so as to achieve more accurate side link communication.

[0046] In combination with some embodiments of the first aspect, the first condition includes the restriction of sending multiple carriers simultaneously; discarding all PSFCHs to be sent on a specific carrier includes: according to the priority of the PSFCHs to be sent in the carrier, discarding the PSFCHs corresponding to the carriers with the lowest priority of the PSFCHs to be sent from the Wth frequency band in sequence; until the number of carriers in the Wth frequency band is less than or equal to the number of carriers with the restriction of sending multiple carriers simultaneously.

[0047] In the above embodiment, a method of discarding the PSFCH to be transmitted on a specific carrier in the case of restriction on simultaneously transmitting multiple carriers is provided to achieve more accurate side link communication.

[0048] In combination with some embodiments of the first aspect, y2 is less than y1; power adjustment or PSFCH discarding of y1 PSFCHs to be sent to obtain y2 PSFCHs includes: based on the priority corresponding to the PSFCHs to be sent, reducing the power of the PSFCH with the lowest priority among the y1 PSFCHs to be sent; if the total transmission power after power reduction is greater than the first maximum transmission power, discarding the PSFCH undergoing power reduction; until the total transmission power of the PSFCH is less than or equal to the preset first maximum transmission power, y2 PSFCHs are obtained.

[0049] In the above embodiment, the power of a part of the PSFCH transmissions may be reduced and / or discarded to ensure that the terminal can send a corresponding number of PSFCHs at an appropriate power in a carrier aggregation scenario, thereby improving the side link communication efficiency.

[0050] In combination with some embodiments of the first aspect, there are multiple PSFCHs with the lowest priority among the y1 PSFCHs to be sent, and the PSFCHs to be powered down and / or discarded are determined based on the terminal implementation of the terminal itself.

[0051] In the above embodiment, the terminal may determine, based on its own implementation, to reduce the power of and / or discard one or more PSFCHs of the same priority level to achieve more efficient side link communication.

[0052] In combination with some embodiments of the first aspect, the PSFCH corresponding to the primary carrier or the default carrier is not power reduced and / or discarded.

[0053] In the above embodiment, power reduction and / or discarding may not be performed on some carriers, thereby ensuring that the PSFCH on the corresponding carrier can be sent, thereby improving the efficiency and accuracy of side link communications.

[0054] In combination with some embodiments of the first aspect, y2 is equal to y1; the total transmission power of the PSFCH corresponding to the x-th carrier is determined by the number of PSFCHs corresponding to the x-th carrier and the PSFCH transmission power corresponding to the x-th carrier, where x is a positive integer, and the PSFCH transmission power corresponding to the x-th carrier represents the transmission power of a single PSFCH on the x-th carrier. It can be understood that the x-th carrier is one of the multiple carriers transmitted by the terminal.

[0055] In the above embodiment, the terminal can reduce the power of all PSFCHs in the carrier so that a corresponding number of PSFCHs can be sent at an appropriate power in a carrier aggregation scenario without discarding the PSFCH, thereby improving the side link communication efficiency.

[0056] In combination with some embodiments of the first aspect, the PSFCH transmit power corresponding to the x-th carrier is determined based on the first PSFCH transmit power and the second PSFCH transmit power; wherein, the first PSFCH transmit power indicates that the terminal determines the transmit power of a single PSFCH on the x-th carrier, the second PSFCH transmit power indicates the configured transmit power of a single PSFCH on the x-th carrier, the first PSFCH transmit power is determined based on the second PSFCH transmit power, the total transmit power of the PSFCH corresponding to the x-th carrier and the first maximum transmit power, and the second PSFCH transmit power is configured by the network device or pre-configured by the terminal.

[0057] In the above embodiment, a method for determining the average transmission power of the PSFCH corresponding to the carrier is provided, so that the terminal can perform corresponding power reduction based on the power, and send a corresponding number of PSFCHs based on the power, thereby improving the side link communication efficiency.

[0058] According to a second aspect of an embodiment of the present disclosure, a side link communication method is provided, which is executed by a second terminal, and the method includes: receiving a side link feedback channel PSFCH corresponding to multiple carriers transmitted using a first power, wherein there is a time domain overlap between the PSFCHs of at least some carriers among the PSFCHs corresponding to the multiple carriers, and the first power is less than or equal to a pre-set first maximum transmission power.

[0059] In the above embodiment, the PSFCHs corresponding to multiple carriers can be sent at the first power, so that a corresponding number of PSFCHs can be sent at an appropriate power in a carrier aggregation scenario, thereby improving the side link communication efficiency.

[0060] In combination with some embodiments of the second aspect, the PSFCH corresponding to multiple carriers has y1 PSFCHs to be sent; the received PSFCHs corresponding to multiple carriers are determined in the following way: if the total transmission power of y1 PSFCHs to be sent is greater than a preset first maximum transmission power, power adjustment is performed on the y1 PSFCHs to be sent or the PSFCHs are discarded to obtain y2 PSFCHs, where the total transmission power of y2 PSFCHs is the first power, and y2 is less than or equal to y1.

[0061] In combination with some embodiments of the second aspect, the PSFCHs corresponding to the received multiple carriers are determined in the following manner: y3 PSFCHs to be sent are determined, where y3 is greater than a first threshold; based on the priority corresponding to the PSFCHs, the PSFCHs with the lowest priority are discarded in turn from the y3 PSFCHs to be sent, to obtain y1 PSFCHs to be sent, where y1 is less than or equal to the first threshold.

[0062] In combination with some embodiments of the second aspect, at least one bandwidth corresponding to sending PSFCH corresponds to a second threshold respectively, and the sum of the second thresholds corresponding to each bandwidth is equal to the first threshold, wherein the bandwidth includes at least one of a frequency band and a carrier, and each frequency band includes at least one carrier.

[0063] In combination with some embodiments of the second aspect, the second threshold is the maximum number of PSFCHs corresponding to the Rth bandwidth, where R is a positive integer; based on the priority corresponding to the PSFCH, the PSFCH with the lowest priority is discarded in turn from the y3 PSFCHs to be sent, and y1 PSFCHs to be sent are obtained, including: according to the priority corresponding to the PSFCH, the PSFCH with the lowest priority is discarded in turn from the PSFCHs to be sent corresponding to the Rth bandwidth, until the number of PSFCHs corresponding to the Rth bandwidth is less than or equal to the maximum number of PSFCHs corresponding to the Rth bandwidth, and y4 PSFCHs to be sent corresponding to the Rth bandwidth are obtained; wherein, among all the bandwidths occupied by sending PSFCH, the sum of y4 corresponding to each bandwidth is equal to y1.

[0064] In combination with some embodiments of the second aspect, the first threshold is determined based on terminal capabilities of the terminal itself.

[0065] In combination with some embodiments of the second aspect, power adjustment or PSFCH discarding is performed on y1 PSFCHs to be sent, including: if the total transmission power of the PSFCH to be sent corresponding to the R-th bandwidth is greater than the second maximum transmission power corresponding to the R-th bandwidth, power adjustment or PSFCH discarding is performed on the PSFCH to be sent corresponding to the R-th bandwidth; wherein, in all bandwidths occupied by sending PSFCH, the sum of the second maximum transmission powers corresponding to each bandwidth is equal to the first maximum transmission power; the second maximum transmission power is based on high-level signaling configuration, or the second maximum transmission power is determined based on the total transmission power of the PSFCH to be sent corresponding to all bandwidths, the total transmission power of the PSFCH to be sent corresponding to the R-th bandwidth and the first maximum transmission power, and R is a positive integer.

[0066] In combination with some embodiments of the second aspect, the bandwidth includes a frequency band, and the total transmit power of the PSFCH corresponding to the Wth frequency band is determined based on the total transmit power of the PSFCH corresponding to each carrier in the Wth frequency band, where W is a positive integer.

[0067] In combination with some embodiments of the second aspect, the PSFCHs corresponding to the received multiple carriers are determined in the following manner: discarding all PSFCHs to be sent on a specific carrier, where the specific carrier is a carrier in the Wth frequency band that satisfies the first condition, and W is a positive integer; the first condition includes at least one of the following: restrictions on simultaneous transmission of multiple carriers; carrier combination requirements; and RF retuning time limits.

[0068] In combination with some embodiments of the second aspect, the first condition includes the restriction of sending multiple carriers simultaneously; discarding all PSFCHs to be sent on a specific carrier includes: according to the priority of the PSFCHs to be sent in the carrier, discarding the PSFCHs corresponding to the carriers with the lowest priority of the PSFCHs to be sent from the Wth frequency band in sequence; until the number of carriers in the Wth frequency band is less than or equal to the number of carriers with the restriction of sending multiple carriers simultaneously.

[0069] In combination with some embodiments of the second aspect, y2 is less than y1; power adjustment or PSFCH discarding of y1 PSFCHs to be sent to obtain y2 PSFCHs includes: based on the priority corresponding to the PSFCHs to be sent, reducing the power of the PSFCH with the lowest priority among the y1 PSFCHs to be sent; if the total transmission power after power reduction is greater than the first maximum transmission power, discarding the PSFCH undergoing power reduction; until the total transmission power of the PSFCH is less than or equal to the preset first maximum transmission power, y2 PSFCHs are obtained.

[0070] In combination with some embodiments of the second aspect, there are multiple PSFCHs with the lowest priority among the y1 PSFCHs to be sent, and the PSFCHs to be powered down and / or discarded are determined based on the terminal implementation of the terminal itself.

[0071] In combination with some embodiments of the second aspect, the PSFCH corresponding to the primary carrier or the default carrier is not power reduced and / or discarded.

[0072] In combination with some embodiments of the second aspect, y2 is equal to y1; the total transmission power of the PSFCH corresponding to the x-th carrier is determined by the number of PSFCHs corresponding to the x-th carrier and the PSFCH transmission power corresponding to the x-th carrier, where x is a positive integer, and the PSFCH transmission power corresponding to the x-th carrier represents the transmission power of a single PSFCH on the x-th carrier. It can be understood that the x-th carrier is one of the multiple carriers transmitted by the terminal.

[0073] In combination with some embodiments of the second aspect, the PSFCH transmit power corresponding to the x-th carrier is determined based on the first PSFCH transmit power and the second PSFCH transmit power; wherein, the first PSFCH transmit power indicates that the terminal determines the transmit power of a single PSFCH on the x-th carrier, the second PSFCH transmit power indicates the configured transmit power of a single PSFCH on the x-th carrier, the first PSFCH transmit power is determined based on the second PSFCH transmit power, the total transmit power of the PSFCH corresponding to the x-th carrier and the first maximum transmit power, and the second PSFCH transmit power is configured by the network device or pre-configured by the terminal.

[0074] According to a third aspect of an embodiment of the present disclosure, a side link communication method is provided, the method comprising: a first terminal sends a side link feedback channel PSFCH corresponding to multiple carriers using a first power, wherein there is a time domain overlap between the PSFCHs of at least some carriers among the PSFCHs corresponding to the multiple carriers, and the first power is less than or equal to a pre-set first maximum transmission power; and a second terminal receives the PSFCHs corresponding to the multiple carriers sent by the first terminal using the first power.

[0075] In the above embodiment, the PSFCHs corresponding to multiple carriers can be sent at the first power, so that a corresponding number of PSFCHs can be sent at an appropriate power in a carrier aggregation scenario, thereby improving the side link communication efficiency.

[0076] According to the fourth aspect of an embodiment of the present disclosure, a first terminal is provided, comprising: a transceiver module; the transceiver module is used to send a side link feedback channel PSFCH corresponding to multiple carriers using a first power, wherein there is a time domain overlap between the PSFCHs of at least some carriers among the PSFCHs corresponding to the multiple carriers, and the first power is less than or equal to a pre-set first maximum transmission power.

[0077] In the above embodiment, the PSFCHs corresponding to multiple carriers can be sent at the first power, so that a corresponding number of PSFCHs can be sent at an appropriate power in a carrier aggregation scenario, thereby improving the side link communication efficiency.

[0078] According to the fifth aspect of an embodiment of the present disclosure, a second terminal is provided, including: a transceiver module; the transceiver module is used to receive a side link feedback channel PSFCH corresponding to multiple carriers transmitted using a first power, wherein there is a time domain overlap between the PSFCHs of at least some carriers among the PSFCHs corresponding to the multiple carriers, and the first power is less than or equal to a pre-set first maximum transmission power.

[0079] In the above embodiment, the PSFCHs corresponding to multiple carriers can be sent at the first power, so that a corresponding number of PSFCHs can be sent at an appropriate power in a carrier aggregation scenario, thereby improving the side link communication efficiency.

[0080] According to a sixth aspect of an embodiment of the present disclosure, a first terminal is provided, comprising: one or more processors; wherein the first terminal is used to execute the first aspect and any one of the side link communication methods in the first aspect.

[0081] In the above embodiment, the PSFCHs corresponding to multiple carriers can be sent at the first power, so that a corresponding number of PSFCHs can be sent at an appropriate power in a carrier aggregation scenario, thereby improving the side link communication efficiency.

[0082] According to the seventh aspect of an embodiment of the present disclosure, a second terminal is provided, comprising: one or more processors; wherein the second terminal is used to execute the second aspect and any one of the side link communication methods in the second aspect.

[0083] In the above embodiment, the PSFCHs corresponding to multiple carriers can be sent at the first power, so that a corresponding number of PSFCHs can be sent at an appropriate power in a carrier aggregation scenario, thereby improving the side link communication efficiency.

[0084] According to an eighth aspect of an embodiment of the present disclosure, a communication system is provided, comprising a first terminal and a second terminal, wherein the first terminal is configured to implement the first aspect and any one of the side link communication methods in the first aspect, and the second terminal is configured to implement the second aspect and any one of the side link communication methods in the second aspect.

[0085] In the above embodiment, the PSFCHs corresponding to multiple carriers can be sent at the first power, so that a corresponding number of PSFCHs can be sent at an appropriate power in a carrier aggregation scenario, thereby improving the side link communication efficiency.

[0086] According to a ninth aspect of an embodiment of the present disclosure, a storage medium is provided, wherein the storage medium stores instructions, and when the instructions are executed on a communication device, the communication device executes a side link communication method such as the first aspect and any one of the items in the first aspect or the second aspect and any one of the items in the second aspect.

[0087] In the above embodiment, the PSFCHs corresponding to multiple carriers can be sent at the first power, so that a corresponding number of PSFCHs can be sent at an appropriate power in a carrier aggregation scenario, thereby improving the side link communication efficiency.

[0088] According to the tenth aspect of the embodiments of the present disclosure, the embodiments of the present disclosure propose a program product. When the program product is executed by a communication device, the communication device executes the method described in the optional implementation manner of the first aspect or the second aspect.

[0089] According to an eleventh aspect of the embodiments of the present disclosure, the embodiments of the present disclosure propose a computer program, which, when executed on a computer, enables the computer to execute the method described in the optional implementation of the first aspect or the second aspect.

[0090] According to a twelfth aspect of the embodiments of the present disclosure, the embodiments of the present disclosure provide a chip or a chip system, which includes a processing circuit configured to execute the method described in the optional implementation of the first or second aspect above.

[0091] It can be understood that the terminal, access network device, first network element, other network elements, core network device, communication system, storage medium, program product, computer program, chip or chip system involved in each embodiment of the present disclosure are used to execute the method proposed in the embodiment of the present disclosure. Therefore, the beneficial effects that can be achieved can refer to the beneficial effects in the corresponding method, which will not be repeated here.

[0092] The disclosed embodiments provide a side link communication method, a terminal, and a storage medium. In some embodiments, the terms side link communication method, information processing method, communication method, etc. can be interchangeable, the terms side link communication device, information processing device, communication device, etc. can be interchangeable, and the terms information processing system, communication system, etc. can be interchangeable.

[0093] The embodiments of the present disclosure are not exhaustive, but are merely illustrative of some embodiments, and are not intended to be a specific limitation on the scope of protection of the present disclosure. In the absence of contradiction, each step in a certain embodiment can be implemented as an independent embodiment, and the steps can be arbitrarily combined. For example, a solution after removing some steps in a certain embodiment can also be implemented as an independent embodiment, and the order of the steps in a certain embodiment can be arbitrarily exchanged. In addition, the optional implementation methods in a certain embodiment can be arbitrarily combined; in addition, the embodiments can be arbitrarily combined, for example, some or all of the steps of different embodiments can be arbitrarily combined, and a certain embodiment can be arbitrarily combined with the optional implementation methods of other embodiments.

[0094] In each embodiment of the present disclosure, unless otherwise specified or there is a logical conflict, the terms and / or descriptions between the embodiments are consistent and can be referenced to each other, and the technical features in different embodiments can be combined to form a new embodiment based on their internal logical relationships.

[0095] The terms used in the embodiments of the present disclosure are only for the purpose of describing specific embodiments and are not intended to limit the present disclosure.

[0096] In the embodiments of the present disclosure, unless otherwise specified, elements expressed in the singular form, such as "a", "an", "the", "above", "said", "aforementioned", "this", etc., may mean "one and only one", or "one or more", "at least one", etc. For example, when using articles such as "a", "an", "the" in English in translation, the noun after the article may be understood as a singular expression or a plural expression.

[0097] In the embodiments of the present disclosure, “plurality” refers to two or more.

[0098] In some embodiments, the terms “at least one,” “one or more,” “a plurality of,” “multiple,” etc. may be used interchangeably.

[0099] In some embodiments, "at least one of A and B", "A and / or B", "A in one case, B in another case", "in response to one case A, in response to another case B", etc., may include the following technical solutions according to the situation: in some embodiments, A (A is executed independently of B); in some embodiments, B (B is executed independently of A); in some embodiments, execution is selected from A and B (A and B are selectively executed); in some embodiments, A and B (both A and B are executed). When there are more branches such as A, B, C, etc., the above is also similar.

[0100] In some embodiments, the recording method of "A or B" may include the following technical solutions according to the situation: in some embodiments, A (A is executed independently of B); in some embodiments, B (B is executed independently of A); in some embodiments, execution is selected from A and B (A and B are selectively executed). When there are more branches such as A, B, C, etc., the above is also similar.

[0101] The prefixes such as "first" and "second" in the embodiments of the present disclosure are only used to distinguish different description objects, and do not constitute restrictions on the position, order, priority, quantity or content of the description objects. The statement of the description object refers to the description in the context of the claims or embodiments, and should not constitute unnecessary restrictions due to the use of prefixes. For example, if the description object is a "field", the ordinal number before the "field" in the "first field" and the "second field" does not limit the position or order between the "fields", and the "first" and "second" do not limit whether the "fields" they modify are in the same message, nor do they limit the order of the "first field" and the "second field". For another example, if the description object is a "level", the ordinal number before the "level" in the "first level" and the "second level" does not limit the priority between the "levels". For another example, the number of description objects is not limited by the ordinal number, and can be one or more. Taking the "first device" as an example, the number of "devices" can be one or more. In addition, the objects modified by different prefixes may be the same or different. For example, if the description object is "device", then the "first device" and the "second device" may be the same device or different devices, and their types may be the same or different. For another example, if the description object is "information", then the "first information" and the "second information" may be the same information or different information, and their contents may be the same or different.

[0102] In some embodiments, “including A”, “comprising A”, “used to indicate A”, and “carrying A” can be interpreted as directly carrying A or indirectly indicating A.

[0103] In some embodiments, terms such as "in response to ...", "in response to determining ...", "in the case of ...", "at the time of ...", "when ...", "if ...", "if ...", etc. can be used interchangeably.

[0104] In some embodiments, terms such as "greater than", "greater than or equal to", "not less than", "more than", "more than or equal to", "not less than", "higher than", "higher than or equal to", "not lower than", and "above" can be replaced with each other, and terms such as "less than", "less than or equal to", "not greater than", "less than", "less than or equal to", "no more than", "lower than", "lower than or equal to", "not higher than", and "below" can be replaced with each other.

[0105] In some embodiments, devices and equipment may be interpreted as physical or virtual, and their names are not limited to the names recorded in the embodiments. In some cases, they may also be understood as "equipment", "device", "circuit", "network element", "node", "function", "unit", "section", "system", "network", "chip", "chip system", "entity", "subject", etc.

[0106] In some embodiments, "network" can be interpreted as devices included in the network, such as access network equipment, core network equipment, etc.

[0107] In some embodiments, "access network device (AN device)" may also be referred to as "radio access network device (RAN device)", "base station (BS)", "radio base station (radio base station)", "fixed station (fixed station)", and in some embodiments may also be understood as "node (node)", "access point (access point)", "transmission point (TP)", "reception point (reception point, RP)", "transmission and / or reception point (transmission / reception point, TRP)" "panel (panel)", "antenna panel (antenna panel)", "antenna array (antenna array)" "cell (cell)", "macro cell (macro cell)", "small cell (small cell)", "femto cell (femto cell)", "pico cell (pico cell)", "sector (sector)", "cell group (cell group)", "serving cell (serving cell)", "carrier (carrier)", "component carrier (component carrier)", "bandwidth part (bandwidth part, BWP)" and the like.

[0108] In some embodiments, "terminal" or "terminal device" can be referred to as "user equipment (UE)", "user terminal" "mobile station (MS)", "mobile terminal (MT)", subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless terminal, remote terminal, handset, user agent, mobile client, client, etc.

[0109] In some embodiments, acquisition of data, information, etc. may comply with the laws and regulations of the country where the data is obtained.

[0110] In some embodiments, data, information, etc. may be obtained with the user's consent.

[0111] In addition, each element, each row, or each column in the table of the embodiments of the present disclosure may be implemented as an independent embodiment, and the combination of any element, any row, or any column may also be implemented as an independent embodiment.

[0112] FIG1 is a schematic diagram of a communication system architecture according to an embodiment of the present disclosure.

[0113] As shown in FIG. 1 , a communication system 100 includes a terminal 101 and a network device 102 .

[0114] In some embodiments, the terminal 101 includes, for example, a mobile phone, a wearable device, an Internet of Things device, a car with communication function, a smart car, a tablet computer (Pad), a computer with wireless transceiver function, a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, a wireless terminal device in industrial control, a wireless terminal device in self-driving, a wireless terminal device in remote medical surgery, a wireless terminal device in a smart grid, a wireless terminal device in transportation safety, a wireless terminal device in a smart city, and at least one of a wireless terminal device in a smart home, but is not limited to these.

[0115] In some embodiments, the network device 102 may include at least one of an access network device and a core network device.

[0116] In some embodiments, the access network device is, for example, a node or device that accesses a terminal to a wireless network. The access network device may include an evolved NodeB (eNB), a next generation evolved NodeB (ng-eNB), a next generation NodeB (gNB), a node B (NB), a home node B (HNB), a home evolved nodeB (HeNB), a wireless backhaul device, a radio network controller (RNC), a base station controller (BSC), a base transceiver station (BTS), a base band unit (BBU), a mobile switching center, a base station in a 6G communication system, an open base station (Open RAN), a cloud base station (Cloud RAN), a base station in other communication systems, and at least one of an access node in a Wi-Fi system, but is not limited thereto.

[0117] In some embodiments, the technical solution of the present disclosure may be applicable to the Open RAN architecture. In this case, the interfaces between or within the access network devices involved in the embodiments of the present disclosure may become internal interfaces of the Open RAN, and the processes and information interactions between these internal interfaces may be implemented through software or programs.

[0118] In some embodiments, the access network device may be composed of a centralized unit (central unit, CU) and a distributed unit (distributed unit, DU), wherein the CU may also be referred to as a control unit (control unit). The CU-DU structure may be used to split the protocol layer of the access network device, with some functions of the protocol layer being centrally controlled by the CU, and the remaining part or all of the functions of the protocol layer being distributed in the DU, and the DU being centrally controlled by the CU, but not limited to this.

[0119] In some embodiments, the core network device may be a device including one or more network elements, or may be a plurality of devices or a group of devices, each including all or part of the one or more network elements. The network element may be virtual or physical. The core network may include, for example, at least one of an Evolved Packet Core (EPC), a 5G Core Network (5GCN), and a Next Generation Core (NGC).

[0120] It can be understood that the communication system described in the embodiment of the present disclosure is for the purpose of more clearly illustrating the technical solution of the embodiment of the present disclosure, and does not constitute a limitation on the technical solution proposed in the embodiment of the present disclosure. A person of ordinary skill in the art can know that with the evolution of the system architecture and the emergence of new business scenarios, the technical solution proposed in the embodiment of the present disclosure is also applicable to similar technical problems.

[0121] The following embodiments of the present disclosure may be applied to the communication system 100 shown in FIG1 , or part of the subject, but are not limited thereto. The subjects shown in FIG1 are examples, and the communication system may include all or part of the subjects in FIG1 , or may include other subjects other than FIG1 , and the number and form of the subjects are arbitrary, and the subjects may be physical or virtual, and the connection relationship between the subjects is an example, and the subjects may be connected or disconnected, and the connection may be in any manner, and may be a direct connection or an indirect connection, and may be a wired connection or a wireless connection.

[0122] The embodiments of the present disclosure may be applied to Long Term Evolution (LTE), LTE-Advanced (LTE-A), LTE-Beyond (LTE-B), SUPER 3G, IMT-Advanced, 4th generation mobile communication system (4G), 5th generation mobile communication system (5G), 5G new radio (NR), future radio access (FRA), new radio access technology (RAT), new radio (NR), new radio access (NX), future generation radio access (FX), Global System for Mobile communications (GSM (registered trademark)), CDMA2000, Ultra Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE 802.20, Ultra-WideBand (UWB), Bluetooth (registered trademark), Public Land Mobile Network (PLMN) network, Device-to-Device (D2D) system, Machine-to-Machine (M2M) system, Internet of Things (IoT) system, Vehicle-to-Everything (V2X), systems using other communication methods, next-generation systems based on them, etc. In addition, multiple systems can also be combined (for example, a combination of LTE or LTE-A and 5G, etc.) for application.

[0123] In the embodiment of the present disclosure, in LTE sidelink (SL) carrier aggregation (CA), if the PSCCH or PSSCH transmissions of multiple carriers overlap in the time domain, and the total transmission power of the multiple carriers exceeds the maximum transmission power determined by the terminal, that is, P CMAXThen the transmission power on the corresponding carrier with a large priority value can be reduced or dropped, and the process is repeated until the total transmission power does not exceed P CMAX Among them, P CMAX It is determined by the terminal based on its own configuration. The large priority value mentioned above can be considered as the maximum priority value.

[0124] In some embodiments, for SL transmission mode 3 or 4 in LTE, if the SL transmission of the terminal on one carrier overlaps with the sidelink SL transmission on other carriers in the time domain. And the total transmit power exceeds a preset threshold. The terminal can adjust the transmit power of the SL transmission with sidelink control information (SCI). The "priority" field of the SCI can be set to the maximum value of all "priority" values ​​of the overlapping SL transmissions. In this case, the calculation of the adjustment of the SL transmit power is not specified. If the transmit power still exceeds the above-mentioned preset threshold after the power adjustment, the terminal shall discard the SL transmission with the largest "priority" field in its SCI. And repeat the process on the carrier that is not discarded. When the SL transmissions overlapping in the time domain on two or more carriers have the same "priority" field value, it is not specified which SL transmission the terminal adjusts.

[0125] In some embodiments, in a scenario where a terminal in an NR SL needs to simultaneously feed back multiple PSFCHs, if the number of multiple PSFCHs to be fed back is less than or equal to the maximum number supported by the terminal, and the total transmit power of the terminal is less than or equal to P CMAX Then N TX,PSFCH =N sch,T,XPS Among them, N TX,PSFCH Indicates the number of PSFCHs actually sent by the terminal, N sch,TX,PSFCH Indicates the number of PSFCHs that the terminal is expected to send. Therefore, when the number of PSFCHs that need to be fed back is less than or equal to the maximum number supported by the terminal, N TX,PSFCH Should be equal to N sch,TX,PSFCH At the same time, P PSFCH,K (i) = P PSFC,Hone Among them, P PSFCH,k (i) represents the transmission power of K PSFCHs with priority i, P PSFCH,one Indicates the transmit power of a PSFCH determined by the terminal.

[0126] Among them, P PSFCH,one It can be obtained by formula 1. PSFCH,one =P 0,PSFCH +10log 10 (2μ )+α PSFCH PL ……Formula 1

[0127] Among them, P 0,PSFCH represents the target received power, μ represents the corresponding subcarrier spacing (SCS), α is the path loss compensation coefficient, and PL represents the path loss value of the corresponding path loss (PL). PSFCH,one The unit can be dBm.

[0128] In some embodiments, if the total transmission power of the PSFCH sent by the terminal is greater than P CMAX , then we can make Among them, M i It can represent the total number of PSFCHs with priority i. K can be The maximum value of . Where i is the priority value, the smaller the priority value, the higher the priority. It can be determined that the sum of the transmission powers of multiple PSFCHs that meet the priority value less than or equal to i needs to be less than or equal to P CMAX In the case of the maximum number of PSFCH, the priority value is the K mentioned above. In this case, N can be determined according to the implementation of the terminal. TX,PSFCH The value of P PSFCH,K (i) = min(P CMAX -10log 10 (N TX,PSFCH ), P PSFCH,one ).

[0129] Understandably, The situation mainly corresponds to when the priority value is less than or equal to K+1, the number of sent PSFCHs exceeds the maximum number supported by the terminal, and when the priority value is less than or equal to K, the number of sent PSFCHs does not exceed the maximum number supported by the terminal. However, in fact, among multiple PSFCHs with a priority value of K+1, the terminal can still send some of the PSFCHs, and the number of sent PSFCHs does not exceed the maximum number supported by the terminal.

[0130] In some embodiments, the number of multiple PSFCHs that need to be fed back is greater than the maximum number supported by the terminal, and the total transmit power of the terminal is less than or equal to P CMAX . The difference from the above embodiment is that N TX,PSFCH =N MAX,PSFCH Among them, N MAX,PSFCH Indicates the maximum number of PSFCHs that the terminal supports sending.

[0131] In some embodiments, for PSFCH feedback performed by a terminal at the same occasion, it is possible to provide feedback to multiple resource pools at the same time. Some resources in a resource pool can be used for PSFCH. The power control parameters for PSFCH can be located in a specific field. For example, the specific field can be SL-ResourcePoolIE. Therefore, it can be considered to be configured for each resource pool. Among them, multiple resource pools with overlapping PSFCH resources are fixed, and the power control parameters in these resource pools are configured to the same value.

[0132] For example, you can refer to the following configuration:

[0133] In some embodiments, in the NR SL CA scenario, if the PSFCHs of different carriers overlap, it is also necessary to consider how to perform power control on the PSFCHs. Of course, the number of PSFCHs to be sent can also be determined.

[0134] In some embodiments, power control parameters for different carriers may be configured to different values.

[0135] FIG2 is a schematic diagram of a side link communication method interaction according to an embodiment of the present disclosure. As shown in FIG2 , the present disclosure embodiment relates to a side link communication method, which is used in a communication system 100, and the method includes:

[0136] Step S2101: The first terminal determines the PSFCH to be sent and adjusts the PSFCH to be sent.

[0137] In some embodiments, the first terminal may determine a plurality of PSFCHs to be sent and a transmit power required to send the number of PSFCHs. The first terminal may determine whether to adjust the PSFCHs to be sent and the manner in which to adjust the PSFCHs to be sent based on the relationship between the number of PSFCHs to be sent, the transmit power, and the maximum number of transmits and the maximum transmit power supported by the terminal.

[0138] In some embodiments, the multiple PSFCHs that the terminal needs to send are PSFCHs corresponding to multiple carriers.

[0139] In some embodiments, among the PSFCHs corresponding to multiple carriers that the terminal needs to send, there is time domain overlap between the PSFCHs of at least some carriers.

[0140] For example, assuming that the terminal needs to send PSFCHs corresponding to five carriers, the PSFCHs corresponding to any two, three, four or five carriers overlap in the time domain.

[0141] In some embodiments, the number of the multiple PSFCHs that the terminal needs to send may be y1, where y1 is less than or equal to the maximum number of PSFCHs that the terminal is allowed to send.

[0142] In some embodiments, the number of the multiple PSFCHs that the terminal needs to send may be y3, where y3 is greater than the maximum number of PSFCHs that the terminal is allowed to send.

[0143] In some embodiments, the PSFCH that the first terminal needs to send may be the PSFCH corresponding to multiple carriers.

[0144] In some embodiments, the first terminal may be the terminal 101 mentioned above.

[0145] In some embodiments, the first terminal needs to send y3 PSFCHs. The first terminal can discard the PSFCHs with the lowest priority from the y3 PSFCHs to be sent in turn according to the priorities corresponding to the PSFCHs, and obtain y1 PSFCHs to be sent. Among them, y3 is greater than the first threshold, and y1 is less than or equal to the first threshold.

[0146] For example, assuming that y3 is 10 and the first threshold is 8. The first terminal can determine the PSFCH with the lowest priority among the 10 PSFCHs and discard the PSFCH. The number of PSFCHs remaining is 9, which is still greater than the first threshold. The first terminal can determine the PSFCH with the lowest priority among the remaining 9 PSFCHs and discard the PSFCH. The number of PSFCHs remaining is 8, which is the same as the first threshold. The first terminal stops discarding PSFCH. At this time, y1 is 8.

[0147] In some embodiments, the first threshold may represent the maximum number of PSFCHs supported by the terminal. For example, it may be recorded as N MAX,PSFCH .

[0148] In some embodiments, the first threshold may be determined by the terminal based on its own terminal capabilities. For example, the terminal determines the maximum number of PSFCHs supported by the terminal based on the current power, hardware configuration, software configuration, etc. Of course, the specific terminal can make any selection based on the actual situation, and this disclosure does not limit it.

[0149] In some embodiments, the number of PSFCHs that the first terminal needs to send is, for example, y3. MAX,PSFCH In the case of , it means that the first terminal can only send N MAX,PSFCHPSFCHs. Therefore, the first terminal needs to adjust y3 PSFCHs. For example, the first terminal discards the PSFCH with the lowest priority from y3 PSFCHs in turn based on the priority level corresponding to the PSFCH. For example, the first terminal can determine the priority of the corresponding PSFCH according to the priority value of the sent PSFCH. Among them, the larger the priority value, the lower the priority.

[0150] For example, the first terminal may preferentially discard the PSFCH with the largest priority value, and determine again whether the number of PSFCHs after discarding is greater than N. MAX,PSFCH . For the number of PSFCHs discarded is greater than N MAX,PSFCH In the case of N, the PSFCH with the highest priority value among the remaining PSFCHs will continue to be discarded, that is, the PSFCH with the lowest priority. MAX,PSFCH This quantity can be y1, in which case y1 can usually be equal to N MAX,PSFCH .

[0151] In some embodiments, at least one bandwidth corresponding to the transmission of the PSFCH corresponds to a second threshold value, and the sum of the second threshold values ​​corresponding to each bandwidth is equal to the first threshold value. The bandwidth may include at least one of a frequency band and a carrier. A frequency band may include at least one carrier. The sum of the second threshold values ​​corresponding to each bandwidth may be less than or equal to the first threshold value.

[0152] For example, when the bandwidth is a frequency band, a separate third threshold may be corresponding to each frequency band. In this case, the third threshold is the upper second threshold. The sum of the third thresholds corresponding to each frequency band may be less than or equal to the first threshold.

[0153] For another example, when the bandwidth is a carrier, a separate fourth threshold may be corresponding to each carrier. In this case, the fourth threshold is the upper second threshold. The sum of the fourth thresholds corresponding to each carrier may be less than or equal to the first threshold.

[0154] In some embodiments, the second threshold may be the second threshold corresponding to the Rth bandwidth, that is, the second threshold may be the maximum number of PSFCHs corresponding to the Rth bandwidth. R is a positive integer. The maximum number of PSFCHs corresponding to the Rth bandwidth indicates the maximum number of PSFCHs allowed to be sent on the Rth bandwidth.

[0155] In some embodiments, the first terminal may make adjustments for different bandwidths respectively.

[0156] For example, for the Rth bandwidth, the first terminal discards the PSFCH with the lowest priority from the PSFCH to be sent corresponding to the Rth bandwidth in order according to the priority level of the PSFCH to be sent. Until the number of PSFCHs corresponding to the Rth bandwidth is less than or equal to the maximum number of PSFCHs corresponding to the Rth bandwidth. Among them, the number of PSFCHs of the Rth bandwidth after PSFCH adjustment can be called y4. That is, y4 PSFCHs to be sent corresponding to the Rth bandwidth.

[0157] For example, for the Rth bandwidth, the first terminal discards the PSFCH with the lowest priority from the PSFCH corresponding to the Rth bandwidth according to the priority level of the PSFCH. Then the first terminal determines again based on the remaining PSFCH whether the number of PSFCHs corresponding to the Rth bandwidth is less than or equal to the maximum number of PSFCHs corresponding to the Rth bandwidth. If the number of PSFCHs corresponding to the Rth bandwidth is still greater than the maximum number of PSFCHs corresponding to the Rth bandwidth, the PSFCH with the lowest priority among the remaining PSFCHs will continue to be discarded. Until the number of PSFCHs corresponding to the Rth bandwidth is less than or equal to the maximum number of PSFCHs corresponding to the Rth bandwidth.

[0158] In some embodiments, in the total bandwidth occupied by sending PSFCH, the sum of y4 corresponding to each bandwidth should be equal to y1.

[0159] In some embodiments, the number of PSFCHs that the terminal needs to send is less than or equal to N MAX,PSFCH In this case, y1 can be equal to the number of PSFCHs corresponding to multiple carriers that the terminal needs to send.

[0160] In some embodiments, the number of PSFCHs that the terminal needs to send is greater than N MAX,PSFCH In this case, y1 can be equal to N MAX,PSFCH .

[0161] In some embodiments, different frequency bands may have their own corresponding N MAX,PSFCH , which can be recorded as N MAX,PSFCH,f . N MAX,PSFCH,f It can be expressed as N corresponding to the frequency band f MAX,PSFCH .

[0162] In some embodiments, the number of PSFCHs that the first terminal needs to send is y1. In this case, since y1 is less than or equal to the first threshold, the first terminal may not adjust the PSFCH.

[0163] It can be considered that the PSFCHs corresponding to the multiple carriers sent by the first terminal have y1 PSFCHs to be sent.

[0164] In some embodiments, y1 PSFCHs to be sent may be considered to satisfy N MAX,PSFCH In this case, it can be determined whether to adjust the power of y1 PSFCHs to be sent or to discard the PSFCHs according to the total transmission power of y1 PSFCHs to be sent.

[0165] In some embodiments, when the total transmission power of y1 PSFCHs to be transmitted is greater than a preset first maximum transmission power, the first terminal may perform power adjustment or PSFCH discard on y1 PSFCHs to be transmitted to obtain y2 PSFCHs. The total transmission power of y2 PSFCHs may be referred to as the first power. The first power is less than or equal to the first maximum transmission power. y2 is less than or equal to y1.

[0166] It can be understood that the first maximum transmit power can be considered as the maximum transmit power pre-configured by the terminal. For example, the terminal can determine the first maximum transmit power according to its own configuration.

[0167] In some embodiments, the first maximum transmit power may be denoted as P CMAX .

[0168] For example, the total transmission power of y1 PSFCHs to be transmitted is greater than P CMAX In the case of , the first terminal needs to adjust the power of y1 PSFCHs to be sent or discard the PSFCHs, and then obtain y2 PSFCHs. Make the total transmission power of y2 PSFCHs less than or equal to P CMAX , thereby meeting the constraints of the sending requirements.

[0169] It is clear that P CMAX It can be the first maximum transmission power determined according to actual needs. When the terminal transmission power exceeds P CMAX It can be considered that the sending requirement is not met. CMAX It can be determined by the terminal based on its own configuration, and a suitable value can be selected according to actual conditions, which is not limited in the present disclosure.

[0170] In some embodiments, y2 is less than or equal to y1, and the first terminal may reduce the power and / or discard the y1 PSFCHs to be transmitted. In this case, only part of the PSFCHs may be reduced in power and / or discarded.

[0171] For example, the first terminal may reduce the power of the PSFCH with the lowest priority among y1 PSFCHs to be sent based on the priorities of the PSFCHs to be sent. The first terminal determines whether the total transmit power corresponding to the y1 PSFCHs to be sent after the power reduction is greater than the first maximum transmit power.

[0172] In one case, when the total transmission power corresponding to the y1 PSFCHs to be transmitted after power reduction is less than or equal to the first maximum transmission power, y2 is still equal to y1. The first terminal only reduces the power of the PSFCH with the lowest priority.

[0173] In another case, if the total transmit power corresponding to the y1 PSFCHs to be sent after power reduction is still greater than the first maximum transmit power, the first terminal may discard the PSFCH for which power reduction is performed, that is, discard the PSFCH with the lowest priority among the y1 PSFCHs to be sent. The first terminal again determines whether the total transmit power corresponding to the remaining PSFCHs after discarding the PSFCHs is greater than the first maximum transmit power.

[0174] In one case, when the total transmit power corresponding to the remaining PSFCH after discarding the PSFCH is less than or equal to the first maximum transmit power, y2 is less than y1. The first terminal discards the PSFCH with the lowest priority to ensure that the total transmit power of y2 PSFCHs is less than or equal to P CMAX .

[0175] In another case, if the total transmission power corresponding to the remaining PSFCH after discarding the PSFCH is still greater than the first maximum transmission power, the first terminal can repeat the above process, that is, reduce the power or discard the PSFCH with the lowest priority from the remaining PSFCHs, until the total transmission power corresponding to the remaining PSFCH is less than or equal to the first maximum transmission power, and y2 PSFCHs are obtained.

[0176] For example, for a PSFCH transmitted on a carrier, the transmission power on the carrier can be guaranteed to be the following formula. PSFCH,one,c =P 0,PSFCH,c +10log 10 (2 μ )+α PSFCH,c PL ……Formula 2

[0177] Wherein, c represents the carrier index. PSFCH,one,c It represents the transmit power value of PSFCH obtained after power control on each carrier.

[0178] In some embodiments, when there are multiple PSFCHs with the lowest priority among y1 PSFCHs to be sent, the first terminal may determine which PSFCH to reduce power and / or discard based on the terminal implementation of the first terminal itself.

[0179] For example, the first terminal determines to reduce the power of the PSFCH with the lowest priority among y1 PSFCHs to be sent, but at this time there are multiple PSFCHs with the same priority, all of which are the lowest. The first terminal can decide to reduce the power of a certain PSFCH among the multiple PSFCHs with the lowest priority according to its own terminal implementation. Of course, the PSFCH can also be discarded.

[0180] For another example, the first terminal determines to reduce the power of the PSFCH with the lowest priority among the remaining PSFCHs to be sent after the PSFCH is discarded, but at this time there are multiple PSFCHs with the same priority, all of which are the lowest. The first terminal can decide to reduce the power of a PSFCH among the multiple PSFCHs with the lowest priority according to its own terminal implementation. Of course, the PSFCH can also be discarded.

[0181] Of course, the specific terminal implementation may be a preset rule pre-stored in the terminal, or determined by the terminal based on its own power, hardware conditions, and software conditions. The present disclosure does not limit the specific implementation of the terminal.

[0182] In some embodiments, the first terminal does not perform power reduction and / or discard for a PSFCH corresponding to a primary carrier or a default carrier.

[0183] For example, when the terminal determines to reduce the power of the PSFCH with the lowest priority among y1 PSFCHs to be sent, but the PSFCH with the lowest priority is a PSFCH sent on the primary carrier or the default carrier, the first terminal does not reduce the power and / or discard the PSFCH.

[0184] Of course, the primary carrier or the default carrier may be pre-configured, and which carriers are the primary carriers and which carriers are the default carriers may be defined according to actual conditions, which is not specifically limited in the present disclosure.

[0185] In some embodiments, y2 is equal to y1, and the first terminal may reduce the power of all PSFCHs among the y1 PSFCHs to be transmitted. In this case, the number of PSFCHs will not be changed, but the power of all PSFCHs will be reduced.

[0186] In some embodiments, a separate power adjustment may be performed for each carrier, which is mainly due to the different power control parameters configured by the resource pool network equipment or pre-configured by the terminal on different carriers.

[0187] In some embodiments, the total transmission power of the PSFCH corresponding to the xth carrier can be determined according to the number of PSFCHs corresponding to the xth carrier and the PSFCH transmission power corresponding to the xth carrier. Wherein, x is a positive integer. The PSFCH transmission power corresponding to the xth carrier represents the transmission power of a single PSFCH on the xth carrier.

[0188] For example, the P corresponding to each PSFCH in each carrier PSFCH,one,c It can be determined by referring to Formula 2. The total transmit power of the PSFCH corresponding to the x-th carrier can be determined by referring to Formula 3.

[0189] Among them, if N sch,TX,PSFCH,c =0, then a c =0; in other cases, a c =1. That is, when there is no PSFCH to be sent on a carrier, the transmit power on the carrier is 0. In other cases, the transmit power on the carrier can be equal to the logarithm of the number of PSFCHs sent on the carrier multiplied by 10, and the value is P PSFCH,one,c The sum of (dBm). C represents the number of all carriers. The PSFCH in each carrier is calculated according to P PSFCH,one,c to send.

[0190] In some embodiments, when the terminal performs power reduction on all PSFCHs in the y1 PSFCHs to be transmitted, before performing power reduction, the terminal may determine whether the power reduction meets the requirements according to the terminal's own implementation. N TX,PSFCH .

[0191] in, M i,c It is expressed as follows: for each carrier, the total power is less than or equal to P CMAX The number of PSFCHs of corresponding priority.

[0192] In some embodiments, the PSFCH transmit power corresponding to the x-th carrier is determined based on the first PSFCH transmit power and the second PSFCH transmit power. The first PSFCH transmit power indicates that the terminal determines the transmit power of a single PSFCH on the x-th carrier; the second PSFCH transmit power indicates the configured transmit power of a single PSFCH on the x-th carrier. The first PSFCH transmit power is determined based on the second PSFCH transmit power, the total transmit power of the PSFCH corresponding to the x-th carrier, and the first maximum transmit power. The second PSFCH transmit power is configured by the network device or the terminal.

[0193] In some embodiments, the first PSFCH transmission power is the transmission power of a single PSFCH actually transmitted by the first terminal.

[0194] For example, the PSFCH transmission power corresponding to the xth carrier can be recorded as P PSFCH,K (i) represents the transmission power corresponding to each PSFCH with a priority value within K on the x-th carrier.

[0195] Among them, P PSFCH,K (i) can be determined according to Formula 4. PSFCH,K (i) = min(P new , P PSFCH,one,c )...Formula 4

[0196] Among them, P new That is, the first PSFCH transmission power mentioned above, P PSFCH,one,c That is, the second PSFCH transmission power mentioned above. new It can be determined by formula 5.

[0197] In some embodiments, for M i = 0, which means that for the current carrier, the total transmission power corresponding to all PSFCHs with the highest priority is also greater than P CMAX , it is impossible to send multiple PSFCHs simultaneously. Therefore, for this carrier, only P PSFCH,one,c ≤P CMAX That is, when sending PSFCH alone, ensure that the transmission power of PSFCH is less than or equal to P CMAX .

[0198] Therefore, it can be considered that the first PSFCH transmit power represents the transmit power of the PSFCH corresponding to the xth carrier determined by the terminal. CMAX In the case of new Usually less than P PSFCH,one,c; When the total transmission power of the PSFCH corresponding to the xth carrier is less than P CMAX In the case of new Usually greater than P PSFCH,one,c .

[0199] In some embodiments, if the total transmission power of the PSFCH to be sent corresponding to the Rth bandwidth is greater than the second maximum transmission power corresponding to the Rth bandwidth, the PSFCH to be sent corresponding to the Rth bandwidth is power adjusted or the PSFCH is discarded.

[0200] Among them, in the whole bandwidth occupied by sending PSFCH, the sum of the second maximum transmission power corresponding to each bandwidth is equal to the first maximum transmission power.

[0201] It can be understood that the second maximum transmission power can be considered as the maximum transmission power corresponding to the Rth bandwidth. That is, it represents the maximum value of the transmission power allowed by the first terminal on the Rth bandwidth. When the first terminal determines that the total transmission power of the PSFCH to be transmitted corresponding to the Rth bandwidth exceeds the second maximum transmission power corresponding to the bandwidth. The first terminal can adjust the power of the PSFCH to be transmitted corresponding to the bandwidth or discard the PSFCH. For example, reduce the power or discard part of the PSFCH in the Rth bandwidth.

[0202] In some embodiments, the second maximum transmit power may be configured based on higher layer signaling.

[0203] In some embodiments, the second maximum transmit power may be determined based on the total transmit power of the PSFCH to be transmitted corresponding to all bandwidths, the total transmit power of the PSFCH to be transmitted corresponding to the Rth bandwidth, and the maximum transmit power.

[0204] The total bandwidth corresponds to the total transmission power of the PSFCH to be sent, indicating the total transmission power required for all PSFCHs that the first terminal needs to send.

[0205] The Rth bandwidth corresponds to the total transmission power of the PSFCH to be sent, indicating the total transmission power required by the first terminal for all PSFCHs that need to be sent on the Rth bandwidth.

[0206] For example, the second maximum transmit power can be determined by Formula 6.

[0207] Where f represents different frequency bands, P PSFCH,one,f,c It is expressed as the power control parameter of the corresponding carrier on different frequency bands. sch,TX,PSFCH,f,c It is expressed as the number of PSFCHs transmitted on each carrier in different frequency bands. min Indicates the minimum value of the carrier index on the frequency band, fmax Indicates the maximum value of the carrier index on the frequency band. sch,TX,PSFCH,f,c =0, then a f,c =0; in other cases, a f,c =1.

[0208] In some embodiments, the total transmit power of the PSFCH corresponding to the Wth frequency band is determined based on the total transmit power of the PSFCH corresponding to each carrier in the Wth frequency band, where W is a positive integer.

[0209] In some embodiments, the first terminal may also discard all PSFCHs to be sent on a specific carrier, where the specific carrier may be a carrier that satisfies the first condition in the Wth frequency band.

[0210] In some embodiments, the first condition includes a simultaneous transmission of multiple carrier restrictions.

[0211] For example, assuming that the simultaneous transmission of multiple carriers is limited to a maximum of 6 carriers, but the first terminal needs to simultaneously transmit 8 carriers, which is more than the requirement of the simultaneous transmission of multiple carriers, the first terminal needs to discard the PSFCH corresponding to the specific carrier.

[0212] For example, the terminal may select carriers as specific carriers based on the priority of sending PSFCH on the carriers, and discard the PSFCH corresponding to the specific carriers.

[0213] For example, when there is one carrier with the lowest PSFCH priority, the carrier can be used as a specific carrier and the PSFCH corresponding to the specific carrier is discarded. After that, it is determined based on the remaining carriers whether it is less than or equal to the requirement of simultaneously sending 6 carriers.

[0214] For another example, when there are multiple carriers with the lowest PSFCH priority, the multiple carriers can be used as specific carriers, and the PSFCHs corresponding to the multiple specific carriers are discarded. After that, it is determined whether the number of carriers is less than or equal to the requirement of simultaneously sending 6 carriers based on the remaining carriers.

[0215] For another example, when there are multiple carriers with the lowest PSFCH priority, the terminal can decide which carriers corresponding to the PSFCHs are used as specific carriers according to its own implementation, and discard the PSFCHs corresponding to the specific carriers. After that, it continues to determine whether it is less than or equal to the requirement of sending 6 carriers simultaneously based on the remaining carriers.

[0216] In the above example, when the remaining carriers are still greater than the requirement for simultaneously transmitting 6 carriers, the first terminal continues to determine the specific carriers using one or more of the above methods based on the remaining carriers, and discards the PSFCH corresponding to the specific carrier, until the remaining carriers are less than or equal to the requirement for simultaneously transmitting 6 carriers.

[0217] In some embodiments, when the first condition includes a restriction on sending multiple carriers simultaneously, the first terminal may discard all PSFCHs corresponding to the carrier with the lowest priority of the PSFCH to be sent from the Wth frequency band in sequence according to the priority of the PSFCH to be sent in the carrier, until the number of carriers in the Wth frequency band is less than or equal to the number of carriers restricted from sending multiple carriers simultaneously.

[0218] For example, the first terminal may determine the PSFCH with the lowest priority among all PSFCHs to be sent on all carriers, and discard all PSFCHs in the carrier corresponding to the PSFCH. The first terminal determines whether it is less than or equal to the number of carriers restricted to simultaneously sending multiple carriers based on the remaining carriers. When the remaining carriers are still greater than the number of carriers restricted to simultaneously sending multiple carriers, the first terminal determines the carrier corresponding to the PSFCH with the lowest priority among the remaining carriers based on the remaining carriers, and discards all PSFCHs in the carrier. Until the remaining carriers are less than or equal to the number of carriers restricted to simultaneously sending multiple carriers.

[0219] In some embodiments, the first condition includes a carrier combination requirement.

[0220] For example, the carrier combination requirement may be that continuous carriers must be sent. Therefore, assuming that the carriers that the first terminal needs to send are carrier 0, carrier 2, and carrier 3, the first terminal needs to discard the PSFCH corresponding to carrier 0. Until the number of carriers in the Wth frequency band meets the limit of the carrier combination requirement.

[0221] For another example, the carrier combination requirement may directly limit the partial carrier combination allowed to be sent. Then the terminal needs to discard all PSFCHs corresponding to other carriers outside the carrier combination requirement in the Wth frequency band, until the number of carriers in the Wth frequency band meets the limitation of the carrier combination requirement.

[0222] In some embodiments, the first condition includes a radio frequency retuning time limit.

[0223] For example, the RF retuning time limit may be the time limit required for switching carriers. For example, it can be assumed that the first terminal needs to switch carriers through two time slots. For two adjacent slots, such as slot1 and slot2, slot1 sends the PSFCH corresponding to carrier 0 and the PSFCH corresponding to carrier 1, and slot2 sends the PSFCH corresponding to carrier 0 and the PSFCH corresponding to carrier 2. For carrier 0, it needs to be sent in both slot1 and slot2, and does not involve carrier switching. Therefore, the PSFCH corresponding to carrier 0 can be sent on slot2. For carrier 2, since the PSFCH corresponding to carrier 1 is sent on slot1, carrier switching is required for slot2. In other words, carrier 1 needs to be switched to carrier 2. However, since carrier switching requires two slots. Therefore, the process of switching from carrier 1 to carrier 2 cannot be completed in slot2. Therefore, for the first terminal in slot2, it can only choose to discard the PSFCH corresponding to carrier 2. Then the first terminal in slot2 can only send the PSFCH corresponding to carrier 0, but cannot send the PSFCH corresponding to carrier 2.

[0224] It is understandable that in the above embodiments, when at least one of power reduction and discarding is performed on a PSFCH and / or a PSFCH within a carrier, after power reduction and / or discarding is performed once, it can be determined again whether the corresponding requirements are met based on the remaining PSFCH and / or carrier. The above power reduction and / or discarding is repeated until the remaining PSFCH and / or carrier meet the corresponding requirements.

[0225] Step S2102: The first terminal sends PSFCHs corresponding to multiple carriers to the second terminal using a first power.

[0226] In some embodiments, the first terminal sends the PSFCH corresponding to multiple carriers to the second terminal using the first power.

[0227] In some embodiments, the second terminal receives a PSFCH corresponding to multiple carriers transmitted using a first power.

[0228] In some embodiments, the first terminal sends a PSFCH corresponding to a different bandwidth to the second terminal using the second power.

[0229] In some embodiments, the second terminal receives a PSFCH corresponding to a different bandwidth transmitted using a second power.

[0230] The sum of the PSFCHs corresponding to the multiple bandwidths is the same as the PSFCHs corresponding to the multiple carriers transmitted and / or received using the first power. The sum of the second powers corresponding to the multiple bandwidths is equal to the first power.

[0231] In some embodiments, the terms "side link", "side", "sidelink", "sideline communication", "sidelink communication", "direct connection", "direct link", "direct communication", "direct link communication" and other terms can be used interchangeably.

[0232] In some embodiments, terms such as "send", "transmit", "report", "send", "transmit", "bidirectional transmission", "send and / or receive" can be used interchangeably.

[0233] The side link communication method involved in the embodiment of the present disclosure may include at least one of step S2101 to step S2102. For example, step S2102 may be implemented as an independent embodiment, but is not limited thereto.

[0234] In some embodiments, step S2101 is optional, and one or more of these steps may be omitted or replaced in different embodiments.

[0235] In some embodiments, reference may be made to other optional implementations recorded before or after the description corresponding to FIG. 2 .

[0236] FIG3a is a flow chart of a side link communication method according to an exemplary embodiment. As shown in FIG3a, the embodiment of the present disclosure relates to a side link communication method, which can be executed on a first terminal, and the method includes:

[0237] Step S3101, determine the PSFCH to be sent, and adjust the PSFCH to be sent.

[0238] The optional implementation of step S3101 can refer to the optional implementation of step S2101 in FIG. 2 and other related parts in the embodiment involved in FIG. 2 , which will not be described in detail here.

[0239] Step S3102: Send PSFCHs corresponding to multiple carriers using a first power.

[0240] The optional implementation of step S3102 can refer to the optional implementation of step S2102 in FIG. 2 and other related parts in the embodiment involved in FIG. 2 , which will not be described in detail here.

[0241] FIG3b is a flow chart of another side link communication method according to an exemplary embodiment. As shown in FIG3b, the embodiment of the present disclosure relates to a side link communication method, which can be executed on a first terminal, and the method includes:

[0242] Step S3201: Send PSFCHs corresponding to multiple carriers using a first power.

[0243] The optional implementation of step S3201 can refer to the optional implementation of step S2102 in Figure 2, the optional implementation of step S3102 in Figure 3a, and other related parts in the embodiment involved in Figure 2 and other related parts in the embodiment involved in Figure 3a, which will not be repeated here.

[0244] In some embodiments, the PSFCHs corresponding to multiple carriers have y1 PSFCHs to be sent; the method also includes: if the total transmission power of the y1 PSFCHs to be sent is greater than a preset first maximum transmission power, power adjustment is performed on the y1 PSFCHs to be sent or the PSFCHs are discarded to obtain y2 PSFCHs, wherein the total transmission power of the y2 PSFCHs is the first power, and y2 is less than or equal to y1.

[0245] In some embodiments, the method also includes: determining y3 PSFCHs to be sent, where y3 is greater than a first threshold; based on the priority corresponding to the PSFCH, discarding the PSFCH with the lowest priority from the y3 PSFCHs to be sent in turn, to obtain y1 PSFCHs to be sent, where y1 is less than or equal to the first threshold.

[0246] In some embodiments, at least one bandwidth corresponding to sending PSFCH corresponds to a second threshold respectively, and the sum of the second thresholds corresponding to each bandwidth is equal to the first threshold, wherein the bandwidth includes at least one of a frequency band and a carrier, and each frequency band includes at least one carrier.

[0247] In some embodiments, the second threshold is the maximum number of PSFCHs corresponding to the Rth bandwidth, where R is a positive integer; based on the priority corresponding to the PSFCH, the PSFCH with the lowest priority is discarded in turn from the y3 PSFCHs to be sent, to obtain y1 PSFCHs to be sent, including: according to the priority corresponding to the PSFCH, the PSFCH with the lowest priority is discarded in turn from the PSFCHs to be sent corresponding to the Rth bandwidth, until the number of PSFCHs corresponding to the Rth bandwidth is less than or equal to the maximum number of PSFCHs corresponding to the Rth bandwidth, to obtain y4 PSFCHs to be sent corresponding to the Rth bandwidth; wherein, among all the bandwidths occupied by sending PSFCH, the sum of y4 corresponding to each bandwidth is equal to y1.

[0248] In some embodiments, the first threshold is determined based on terminal capabilities of the terminal itself.

[0249] In some embodiments, power adjustment or PSFCH discarding is performed on y1 PSFCHs to be sent, including: if the total transmission power of the PSFCHs to be sent corresponding to the R-th bandwidth is greater than the second maximum transmission power corresponding to the R-th bandwidth, power adjustment or PSFCH discarding is performed on the PSFCH to be sent corresponding to the R-th bandwidth; wherein, in all bandwidths occupied by sending PSFCH, the sum of the second maximum transmission powers corresponding to each bandwidth is equal to the first maximum transmission power; the second maximum transmission power is based on high-level signaling configuration, or the second maximum transmission power is determined based on the total transmission power of the PSFCHs to be sent corresponding to all bandwidths, the total transmission power of the PSFCHs to be sent corresponding to the R-th bandwidth and the first maximum transmission power, and R is a positive integer.

[0250] In some embodiments, the bandwidth includes a frequency band, and the total transmit power of the PSFCH corresponding to the Wth frequency band is determined based on the total transmit power of the PSFCH corresponding to each carrier in the Wth frequency band, where W is a positive integer.

[0251] In some embodiments, the method also includes: discarding all PSFCHs to be sent on a specific carrier, wherein the specific carrier is a carrier in the Wth frequency band that satisfies a first condition, and W is a positive integer; the first condition includes at least one of the following: restrictions on sending multiple carriers simultaneously; carrier combination requirements; and radio frequency retuning time restrictions.

[0252] In some embodiments, the first condition includes a restriction on sending multiple carriers simultaneously; discarding all PSFCHs to be sent on a specific carrier includes: according to the priority of the PSFCHs to be sent in the carrier, discarding the PSFCHs corresponding to the carriers with the lowest priority of the PSFCHs to be sent from the Wth frequency band in sequence; until the number of carriers in the Wth frequency band is less than or equal to the number of carriers restricted from sending multiple carriers simultaneously.

[0253] In some embodiments, y2 is less than y1; power adjustment or PSFCH discarding of y1 PSFCHs to be sent to obtain y2 PSFCHs includes: based on the priority corresponding to the PSFCHs to be sent, reducing the power of the PSFCH with the lowest priority among the y1 PSFCHs to be sent; if the total transmission power after power reduction is greater than the first maximum transmission power, discarding the PSFCH with power reduction; until the total transmission power of the PSFCH is less than or equal to the preset first maximum transmission power, y2 PSFCHs are obtained.

[0254] In some embodiments, there are multiple PSFCHs with the lowest priority among the y1 PSFCHs to be sent, and the PSFCHs to be powered down and / or discarded are determined based on the terminal implementation of the terminal itself.

[0255] In some embodiments, the PSFCH corresponding to the primary carrier or the default carrier is not power reduced and / or dropped.

[0256] In some embodiments, y2 is equal to y1; the total transmission power of the PSFCH corresponding to the x-th carrier is determined by the number of PSFCHs corresponding to the x-th carrier and the PSFCH transmission power corresponding to the x-th carrier, where x is a positive integer, and the PSFCH transmission power corresponding to the x-th carrier represents the transmission power of a single PSFCH on the x-th carrier. It can be understood that the x-th carrier is one of the multiple carriers transmitted by the terminal.

[0257] In some embodiments, the PSFCH transmit power corresponding to the x-th carrier is determined based on the first PSFCH transmit power and the second PSFCH transmit power; wherein, the first PSFCH transmit power indicates the transmit power of a single PSFCH on the x-th carrier determined by the terminal, the second PSFCH transmit power indicates the configured transmit power of a single PSFCH on the x-th carrier, the first PSFCH transmit power is determined based on the second PSFCH transmit power, the total transmit power of the PSFCH corresponding to the x-th carrier and the first maximum transmit power, and the second PSFCH transmit power is configured by the network device or pre-configured by the terminal.

[0258] FIG4 is a flow chart of another side link communication method according to an exemplary embodiment. As shown in FIG4, the embodiment of the present disclosure relates to a side link communication method, which can be executed on a second terminal, and the method includes:

[0259] Step S4101, obtaining PSFCHs corresponding to multiple carriers transmitted with a first power.

[0260] The optional implementation of step S4101 can refer to the optional implementation of step S2102 in FIG. 2 and other related parts in the embodiment involved in FIG. 2 , which will not be described in detail here.

[0261] In some embodiments, the PSFCH corresponding to multiple carriers has y1 PSFCHs to be sent; the received PSFCHs corresponding to multiple carriers are determined in the following manner: if the total transmission power of y1 PSFCHs to be sent is greater than a preset first maximum transmission power, power adjustment is performed on the y1 PSFCHs to be sent or the PSFCHs are discarded to obtain y2 PSFCHs, wherein the total transmission power of y2 PSFCHs is the first power, and y2 is less than or equal to y1.

[0262] In some embodiments, the PSFCHs corresponding to the received multiple carriers are determined in the following manner: y3 PSFCHs to be sent are determined, where y3 is greater than a first threshold; based on the priority corresponding to the PSFCHs, the PSFCHs with the lowest priority are discarded in turn from the y3 PSFCHs to be sent, to obtain y1 PSFCHs to be sent, where y1 is less than or equal to the first threshold.

[0263] In some embodiments, at least one bandwidth corresponding to sending PSFCH corresponds to a second threshold respectively, and the sum of the second thresholds corresponding to each bandwidth is equal to the first threshold, wherein the bandwidth includes at least one of a frequency band and a carrier, and each frequency band includes at least one carrier.

[0264] In some embodiments, the second threshold is the maximum number of PSFCHs corresponding to the Rth bandwidth, where R is a positive integer; based on the priority corresponding to the PSFCH, the PSFCH with the lowest priority is discarded in turn from the y3 PSFCHs to be sent, to obtain y1 PSFCHs to be sent, including: according to the priority corresponding to the PSFCH, the PSFCH with the lowest priority is discarded in turn from the PSFCHs to be sent corresponding to the Rth bandwidth, until the number of PSFCHs corresponding to the Rth bandwidth is less than or equal to the maximum number of PSFCHs corresponding to the Rth bandwidth, to obtain y4 PSFCHs to be sent corresponding to the Rth bandwidth; wherein, among all the bandwidths occupied by sending PSFCH, the sum of y4 corresponding to each bandwidth is equal to y1.

[0265] In some embodiments, the first threshold is determined based on terminal capabilities of the terminal itself.

[0266] In some embodiments, power adjustment or PSFCH discarding is performed on y1 PSFCHs to be sent, including: if the total transmission power of the PSFCHs to be sent corresponding to the R-th bandwidth is greater than the second maximum transmission power corresponding to the R-th bandwidth, power adjustment or PSFCH discarding is performed on the PSFCH to be sent corresponding to the R-th bandwidth; wherein, in all bandwidths occupied by sending PSFCH, the sum of the second maximum transmission powers corresponding to each bandwidth is equal to the first maximum transmission power; the second maximum transmission power is based on high-level signaling configuration, or the second maximum transmission power is determined based on the total transmission power of the PSFCHs to be sent corresponding to all bandwidths, the total transmission power of the PSFCHs to be sent corresponding to the R-th bandwidth and the first maximum transmission power, and R is a positive integer.

[0267] In some embodiments, the bandwidth includes a frequency band, and the total transmit power of the PSFCH corresponding to the Wth frequency band is determined based on the total transmit power of the PSFCH corresponding to each carrier in the Wth frequency band, where W is a positive integer.

[0268] In some embodiments, the PSFCHs corresponding to the received multiple carriers are determined by discarding all PSFCHs to be sent on a specific carrier, where the specific carrier is a carrier in the Wth frequency band that satisfies the first condition, and W is a positive integer; the first condition includes at least one of the following: restrictions on simultaneous transmission of multiple carriers; carrier combination requirements; and RF retuning time limits.

[0269] In some embodiments, the first condition includes a restriction on sending multiple carriers simultaneously; discarding all PSFCHs to be sent on a specific carrier includes: according to the priority of the PSFCHs to be sent in the carrier, discarding the PSFCHs corresponding to the carriers with the lowest priority of the PSFCHs to be sent from the Wth frequency band in sequence; until the number of carriers in the Wth frequency band is less than or equal to the number of carriers restricted from sending multiple carriers simultaneously.

[0270] In some embodiments, y2 is less than y1; power adjustment or PSFCH discarding of y1 PSFCHs to be sent to obtain y2 PSFCHs includes: based on the priority corresponding to the PSFCHs to be sent, reducing the power of the PSFCH with the lowest priority among the y1 PSFCHs to be sent; if the total transmission power after power reduction is greater than the first maximum transmission power, discarding the PSFCH with power reduction; until the total transmission power of the PSFCH is less than or equal to the preset first maximum transmission power, y2 PSFCHs are obtained.

[0271] In some embodiments, there are multiple PSFCHs with the lowest priority among the y1 PSFCHs to be sent, and the PSFCHs to be powered down and / or discarded are determined based on the terminal implementation of the terminal itself.

[0272] In some embodiments, the PSFCH corresponding to the primary carrier or the default carrier is not power reduced and / or dropped.

[0273] In some embodiments, y2 is equal to y1; the total transmission power of the PSFCH corresponding to the x-th carrier is determined by the number of PSFCHs corresponding to the x-th carrier and the PSFCH transmission power corresponding to the x-th carrier, where x is a positive integer, and the PSFCH transmission power corresponding to the x-th carrier represents the transmission power of a single PSFCH on the x-th carrier. It can be understood that the x-th carrier is one of the multiple carriers transmitted by the terminal.

[0274] In some embodiments, the PSFCH transmit power corresponding to the x-th carrier is determined based on the first PSFCH transmit power and the second PSFCH transmit power; wherein, the first PSFCH transmit power indicates the transmit power of a single PSFCH on the x-th carrier determined by the terminal, the second PSFCH transmit power indicates the configured transmit power of a single PSFCH on the x-th carrier, the first PSFCH transmit power is determined based on the second PSFCH transmit power, the total transmit power of the PSFCH corresponding to the x-th carrier and the first maximum transmit power, and the second PSFCH transmit power is configured by the network device or pre-configured by the terminal.

[0275] FIG5 is a flow chart of another side link communication method according to an exemplary embodiment. As shown in FIG5, the embodiment of the present disclosure relates to a side link communication method, and the method includes:

[0276] Step S5101: A first terminal sends PSFCHs corresponding to multiple carriers to a second terminal using a first power.

[0277] The optional implementation method of step S5101 can refer to the optional implementation method of step S2102 in Figure 2, the optional implementation method of step S3102 in Figure 3a, the optional implementation method of step S3201 in Figure 3b, the optional implementation method of step S4101 in Figure 4, and other related parts in the embodiment involved in Figure 2, other related parts in the embodiment involved in Figure 3a, other related parts in the embodiment involved in Figure 3b, and other related parts in the embodiment involved in Figure 4, which will not be repeated here.

[0278] Next, the present disclosure will describe the above solution with more detailed embodiments.

[0279] In some embodiments, the LTE SL CA mechanism may be reused without scaling the transmit power of all PSFCHs.

[0280] In some embodiments, the power on one carrier is guaranteed to be as shown in Formula 2.

[0281] In some embodiments, if the number of PSFCHs to be sent is greater than N MAX,PSFCH , then according to the priority value from large to small (the larger the priority value, the lower the priority), discard the corresponding number of PSFCH, where N MAX,PSFCH The maximum number of PSFCH transmissions supported in each frequency band determined by the terminal based on its own capabilities

[0282] In some embodiments, if each band / carrier is configured with a different N MAX,PSFCHIf the value is set, each frequency band / carrier is prioritized from large to small according to the priority value, the PSFCH transmission on the corresponding frequency band / carrier is discarded, and then the subsequent steps are executed.

[0283] In some embodiments, if the total power of the (remaining) PSFCH transmissions on a PSFCH occasion is greater than P CMAX , the PSFCH corresponding to the maximum priority value will be sent with reduced power (the difference from LTE is that LTE's PSCCH and PSSCH can only send one on a carrier, but PSFCH can send multiple on a carrier), or discarded, and the process is repeated until the total power of the transmission does not exceed P CMAX ;

[0284] In some embodiments, for PSFCHs of the same priority, which PSFCH is to be power reduced or dropped is determined based on implementation.

[0285] In some embodiments, if a primary carrier or a default carrier is configured, the current mechanism ensures that no dropping or power reduction of the PSFCH is performed on the primary carrier or the default carrier.

[0286] In some embodiments, referring to the power control mechanism of NR SL PSFCH (in the case of intra-band CA, each carrier performs power control, N MAX,PSFCH Configured for each frequency band)

[0287] In some embodiments, the transmit power of all PSFCHs may be scaled. At this time, it is necessary to consider that the power control parameters in the resource pools on different carriers are different. In this case, the transmit power of each PSFCH must consider the parameters of each carrier, such as reference formula 2 and / or formula 3.

[0288] In some embodiments, the UE may select a method to satisfy the above-mentioned mechanism based on the implementation.

[0289] in, M i,c It is expressed as follows: for each carrier, the total power is less than or equal to P CMAX The sum of the number of PSFCHs of the corresponding priority. K is the maximum value of the priority value.

[0290] In some embodiments, reference may be made to Formula 4 and Formula 5.

[0291] In some embodiments, if M i = 0, then for each carrier, only P PSFCH,one,c ≤P CMAX .

[0292] In some embodiments, for a PSFCH to be transmitted greater than N MAX,PSFCH In the case of N, only N can be sent according to the priority MAX,PSFCH PSFCH, then N sch,TX,PSFCH =N MAX,PSFCH Only relevant parameters need to be replaced, and for CMAX Select N according to priority TX,PSFCH PSFCH sent.

[0293] In some embodiments, the inter-band CA SL PSFCH power control mechanism (in this case N MAX,PSFCH is configured or defined per frequency band).

[0294] In some embodiments, the PSFCH in each frequency band is first discarded so that the number of PSFCH transmissions in each frequency band is less than or equal to N. MAX,PSFCH,f , where f represents the corresponding frequency band, and this parameter represents the maximum number of PSFCHs that the UE can send in each frequency band. Then, the above process is followed. At this time, the total number of PSFCHs to be sent is the sum of each frequency band after discarding the maximum number of PSFCHs that can be sent in each frequency band.

[0295] In some embodiments, the terminal needs to drop all PSFCH transmissions on certain carriers.

[0296] In some embodiments, the total power is allocated to each frequency band, and the P of each frequency band can be configured by a high-level configuration. CMAX,f , or let P CMAX,f =Total power of the number of PSFCHs to be sent on this frequency band / total power of the number of PSFCHs to be sent on all frequency bands*P CMAX ; Then, if there is only one carrier for a frequency band, the frequency band can refer to the R16 mechanism to determine the PSFCH power and the number of transmissions, but use P CMAX,f Replace the P in the prior art CMAX If there are multiple carriers, the above process is performed, as shown below: CMAX,f Please refer to Formula 6.

[0297] In some embodiments, the UE may need to discard all PSFCH transmissions on certain carriers before executing the above steps.

[0298] In some embodiments, the reason for discarding is due to the limitation of sending multiple at the same time, the limitation of the supported carrier combination or the limitation of the RF re-tuning time. And the carrier to be discarded starts with the carrier with the lowest priority (the largest priority value) among all PSFCH transmissions on the carrier. This is done in sequence until the needs of the above terminal are met. The terminal can perform the above power control allocation process for the PSFCH transmissions on the remaining carriers.

[0299] In the embodiments of the present disclosure, each step can be implemented as an independent embodiment. Some or all of the steps and their optional implementations can be arbitrarily combined with some or all of the steps in other embodiments, and can also be arbitrarily combined with the optional implementations of other embodiments.

[0300] The embodiments of the present disclosure also provide a device for implementing any of the above methods, for example, a side link communication device is provided, the device includes a unit or module for implementing each step performed by the first terminal in any of the above methods. For another example, another side link communication device is provided, including a unit or module for implementing each step performed by the second terminal in any of the above methods.

[0301] It should be understood that the division of the units or modules in the above device is only a division of logical functions, and in actual implementation, they can be fully or partially integrated into one physical entity, or they can be physically separated. In addition, the units or modules in the device can be implemented in the form of a processor calling software: for example, the device includes a processor, the processor is connected to a memory, and instructions are stored in the memory. The processor calls the instructions stored in the memory to implement any of the above methods or implement the functions of the units or modules of the above device, wherein the processor is, for example, a general-purpose processor, such as a central processing unit (CPU) or a microprocessor, and the memory is a memory inside the device or a memory outside the device. Alternatively, the units or modules in the device can be implemented in the form of hardware circuits, and the functions of some or all of the units or modules can be realized by designing the hardware circuits. The above hardware circuits can be understood as one or more processors; for example, in one implementation, the above hardware circuit is an application-specific integrated circuit (ASIC), and the functions of some or all of the above units or modules are realized by designing the logical relationship of the components in the circuit; for example, in another implementation, the above hardware circuit can be realized by a programmable logic device (PLD), taking a field programmable gate array (FPGA) as an example, which can include a large number of logic gate circuits, and the connection relationship between the logic gate circuits is configured by a configuration file, so as to realize the functions of some or all of the above units or modules. All units or modules of the above devices can be realized in the form of a processor calling software, or in the form of a hardware circuit, or in part by a processor calling software, and the rest by a hardware circuit.

[0302] In the disclosed embodiment, the processor is a circuit with signal processing capability. In one implementation, the processor may be a circuit with instruction reading and running capability, such as a central processing unit (CPU), a microprocessor, a graphics processing unit (GPU) (which may be understood as a microprocessor), or a digital signal processor (DSP), etc.; in another implementation, the processor may realize certain functions through the logical relationship of the hardware circuit, and the logical relationship of the above hardware circuit is fixed or reconfigurable, such as a hardware circuit implemented by a processor as an application-specific integrated circuit (ASIC) or a programmable logic device (PLD), such as an FPGA. In a reconfigurable hardware circuit, the processor loads a configuration document to implement the process of hardware circuit configuration, which may be understood as the process of the processor loading instructions to implement the functions of some or all of the above units or modules. In addition, it may also be a hardware circuit designed for artificial intelligence, which may be understood as an ASIC, such as a neural network processing unit (NPU), a tensor processing unit (TPU), a deep learning processing unit (DPU), etc.

[0303] FIG6a is a schematic diagram of a side link communication device according to an exemplary embodiment. As shown in FIG6a, the side link communication device 6100 may be, for example, the first terminal mentioned above, and the device 6100 includes: a transceiver module 6101. Of course, the device 6100 may also include any possible modules such as a processing module 6102, which is not limited in the present disclosure. In some embodiments, the transceiver module 6101 is used to send PSFCHs corresponding to multiple carriers using a first power. Optionally, the transceiver module 6101 is used to perform the communication steps S2102 such as sending and / or receiving performed by the first terminal in any of the above methods, but is not limited to this and will not be repeated here. Optionally, the processing module 6102 is used to perform other steps S2101 performed by the first terminal in any of the above methods, but is not limited to this and will not be repeated here.

[0304] FIG6b is a schematic diagram of another side link communication device according to an exemplary embodiment. As shown in FIG6b , the side link communication device 6200 may be, for example, the second terminal mentioned above, and the device 6200 includes: a transceiver module 6201. Of course, the device 6200 may also include any possible modules such as a processing module, which is not limited in the present disclosure. In some embodiments, the transceiver module 6201 is used to obtain the PSFCH corresponding to multiple carriers transmitted using a first power. Optionally, the transceiver module 6201 is used to perform the communication steps S2102 such as sending and / or receiving performed by the second terminal in any of the above methods, but is not limited to this and will not be repeated here.

[0305] FIG7a is a schematic diagram of the structure of a communication device 7100 proposed in an embodiment of the present disclosure. The communication device 7100 may be a network device (e.g., an access network device, a core network device, etc.), or a terminal (e.g., a user device, etc.), or a chip, a chip system, or a processor that supports a network device to implement any of the above methods, or a chip, a chip system, or a processor that supports a terminal to implement any of the above methods. The communication device 7100 may be used to implement the method described in the above method embodiment, and the details may refer to the description in the above method embodiment.

[0306] As shown in FIG. 7a , the communication device 7100 includes one or more processors 7101. The processor 7101 may be a general-purpose processor or a dedicated processor, for example, a baseband processor or a central processing unit. The baseband processor may be used to process the communication protocol and the communication data, and the central processing unit may be used to control the communication device (such as a base station, a baseband chip, a terminal device, a terminal device chip, a DU or a CU, etc.), execute a program, and process the data of the program. The communication device 7100 is used to execute any of the above methods.

[0307] In some embodiments, the communication device 7100 further includes one or more memories 7102 for storing instructions. Optionally, all or part of the memory 7102 may also be outside the communication device 7100.

[0308] In some embodiments, the communication device 7100 further includes one or more transceivers 7103. When the communication device 7100 includes one or more transceivers 7103, the transceiver 7103 performs the communication steps S2102 such as sending and / or receiving in the above method, but is not limited thereto. The processor 7101 performs other steps S2101, but is not limited thereto.

[0309] In some embodiments, the transceiver may include a receiver and / or a transmitter, and the receiver and the transmitter may be separate or integrated. Optionally, the terms such as transceiver, transceiver unit, transceiver, transceiver circuit, etc. may be replaced with each other, the terms such as transmitter, transmission unit, transmitter, transmission circuit, etc. may be replaced with each other, and the terms such as receiver, receiving unit, receiver, receiving circuit, etc. may be replaced with each other.

[0310] In some embodiments, the communication device 7100 may include one or more interface circuits 7104. Optionally, the interface circuit 7104 is connected to the memory 7102, and the interface circuit 7104 may be used to receive signals from the memory 7102 or other devices, and may be used to send signals to the memory 7102 or other devices. For example, the interface circuit 7104 may read instructions stored in the memory 7102 and send the instructions to the processor 7101.

[0311] The communication device 7100 described in the above embodiments may be a network device or a terminal, but the scope of the communication device 7100 described in the present disclosure is not limited thereto, and the structure of the communication device 7100 may not be limited by FIG. 7a. The communication device may be an independent device or may be part of a larger device. For example, the communication device may be: 1) an independent integrated circuit IC, or a chip, or a chip system or subsystem; (2) a collection of one or more ICs, optionally, the above IC collection may also include a storage component for storing data and programs; (3) an ASIC, such as a modem; (4) a module that can be embedded in other devices; (5) a receiver, a terminal device, an intelligent terminal device, a cellular phone, a wireless device, a handheld device, a mobile unit, a vehicle-mounted device, a network device, a cloud device, an artificial intelligence device, etc.; (6) others, etc.

[0312] Fig. 7b is a schematic diagram of the structure of a chip 7200 provided in an embodiment of the present disclosure. In the case where the communication device 7100 may be a chip or a chip system, reference may be made to the schematic diagram of the structure of the chip 7200 shown in Fig. 7b, but the present invention is not limited thereto.

[0313] The chip 7200 includes one or more processors 7201, and the chip 7200 is used to execute any of the above methods.

[0314] In some embodiments, the chip 7200 further includes one or more interface circuits 7202. Optionally, the interface circuit 7202 is connected to the memory 7203. The interface circuit 7202 can be used to receive signals from the memory 7203 or other devices, and the interface circuit 7202 can be used to send signals to the memory 7203 or other devices. For example, the interface circuit 7202 can read instructions stored in the memory 7203 and send the instructions to the processor 7201.

[0315] In some embodiments, the interface circuit 7202 performs the communication step S2102 of sending and / or receiving in the above method, but is not limited thereto. The processor 7201 performs other steps S2101, but is not limited thereto.

[0316] In some embodiments, terms such as interface circuit, interface, transceiver pin, and transceiver may be used interchangeably.

[0317] In some embodiments, the chip 7200 further includes one or more memories 7203 for storing instructions. Optionally, all or part of the memory 7203 may be outside the chip 7200.

[0318] The present disclosure also proposes a storage medium, on which instructions are stored, and when the instructions are executed on the communication device 7100, the communication device 7100 executes any of the above methods. Optionally, the storage medium is an electronic storage medium. Optionally, the storage medium is a computer-readable storage medium, but is not limited to this, and it can also be a storage medium readable by other devices. Optionally, the storage medium can be a non-transitory storage medium, but is not limited to this, and it can also be a temporary storage medium.

[0319] The present disclosure also proposes a program product, which, when executed by the communication device 7100, enables the communication device 7100 to execute any of the above methods. Optionally, the program product is a computer program product.

[0320] The present disclosure also proposes a computer program, which, when executed on a computer, causes the computer to execute any one of the above methods.

[0321] This paper designs a PSFCH power control method in multi-carrier scenarios and provides two methods based on LTE SL CA and NR SL PSFCH power control mechanisms. It implements the power control of PSFCH in CA scenarios and determines the maximum number of PSFCH transmissions for each frequency band.

[0322] The present disclosure enables, in the NR SL CA scenario, if the PSFCHs of different carriers overlap, to perform power control on the PSFCHs and determine the number of PSFCHs to be sent accordingly.

Claims

A side link communication method, characterized in that: The method is executed by a first terminal, and includes: using a first power to send a side link feedback channel PSFCH corresponding to multiple carriers, wherein there is a time domain overlap between the PSFCHs of at least some carriers among the PSFCHs corresponding to the multiple carriers, and the first power is less than or equal to a pre-set first maximum transmission power. The method according to claim 1, characterized in that The PSFCHs corresponding to the multiple carriers have y1 PSFCHs to be sent; the method also includes: if the total transmission power of the y1 PSFCHs to be sent is greater than a preset first maximum transmission power, power adjustment or PSFCH discarding is performed on the y1 PSFCHs to be sent to obtain y2 PSFCHs, wherein the total transmission power of the y2 PSFCHs is the first power, and y2 is less than or equal to y1. The method according to claim 2, characterized in that The method also includes: determining y3 PSFCHs to be sent, wherein y3 is greater than a first threshold; based on the priority levels corresponding to the PSFCHs, discarding the PSFCHs with the lowest priority in turn from the y3 PSFCHs to be sent to obtain the y1 PSFCHs to be sent, wherein y1 is less than or equal to the first threshold. The method according to claim 3, characterized in that At least one bandwidth corresponding to sending the PSFCH corresponds to a second threshold respectively, and the sum of the second thresholds corresponding to each bandwidth is equal to the first threshold, wherein the bandwidth includes at least one of a frequency band and a carrier, and each frequency band includes at least one carrier. The method according to claim 4, characterized in that The second threshold is the maximum number of PSFCHs corresponding to the Rth bandwidth, where R is a positive integer; based on the priority level corresponding to the PSFCH, the PSFCHs with the lowest priority are discarded in turn from the y3 PSFCHs to be sent to obtain the y1 PSFCHs to be sent, including: according to the priority level corresponding to the PSFCH, the PSFCHs with the lowest priority are discarded in turn from the PSFCHs to be sent corresponding to the Rth bandwidth until the number of PSFCHs corresponding to the Rth bandwidth is less than or equal to the maximum number of PSFCHs corresponding to the Rth bandwidth, to obtain y4 PSFCHs to be sent corresponding to the Rth bandwidth; wherein, in all the bandwidths occupied by sending the PSFCH, the sum of y4 corresponding to each bandwidth is equal to y1. The method according to any one of claims 3 to 5, characterized in that The first threshold is determined based on the terminal capability of the terminal itself. The method according to any one of claims 2 to 6, characterized in that The power adjustment or PSFCH discarding of the y1 PSFCHs to be sent includes: if the total transmission power of the PSFCHs to be sent corresponding to the R-th bandwidth is greater than the second maximum transmission power corresponding to the R-th bandwidth, power adjustment or PSFCH discarding of the PSFCH to be sent corresponding to the R-th bandwidth; wherein, in all bandwidths occupied by sending the PSFCH, the sum of the second maximum transmission powers corresponding to each bandwidth is equal to the first maximum transmission power; the second maximum transmission power is based on high-level signaling configuration, or the second maximum transmission power is determined based on the total transmission power of the PSFCHs to be sent corresponding to all bandwidths, the total transmission power of the PSFCHs to be sent corresponding to the R-th bandwidth and the first maximum transmission power, and R is a positive integer. The method according to claim 7, characterized in that The bandwidth includes frequency bands, and the total transmission power of the PSFCH corresponding to the Wth frequency band is determined based on the total transmission power of the PSFCH corresponding to each carrier in the Wth frequency band, and W is a positive integer. The method according to any one of claims 5 to 8, characterized in that The method also includes: discarding all PSFCHs to be sent on a specific carrier, wherein the specific carrier is a carrier in the Wth frequency band that meets a first condition, and W is a positive integer; the first condition includes at least one of the following: a restriction on sending multiple carriers simultaneously; a carrier combination requirement; and a radio frequency retuning time limit. The method according to claim 9, characterized in that The first condition includes a restriction on sending multiple carriers at the same time; the discarding of all PSFCHs to be sent on a specific carrier includes: according to the priority of the PSFCHs to be sent in the carrier, the PSFCHs corresponding to the carriers with the lowest priority of the PSFCHs to be sent are discarded in sequence from the Wth frequency band; until the number of carriers in the Wth frequency band is less than or equal to the number of carriers restricted from sending multiple carriers at the same time. The method according to any one of claims 2 to 6, characterized in that The y2 is smaller than the y1; the power adjustment or PSFCH discarding of the y1 PSFCHs to be sent to obtain y2 PSFCHs includes: based on the priority corresponding to the PSFCHs to be sent, reducing the power of the PSFCH with the lowest priority among the y1 PSFCHs to be sent; if the total transmission power after the power reduction is greater than the first maximum transmission power, discarding the PSFCH with power reduction; until the total transmission power of the PSFCH is less than or equal to the preset first maximum transmission power, the y2 PSFCHs are obtained. The method according to claim 11, characterized in that There are multiple PSFCHs with the lowest priority among the y1 PSFCHs to be sent, and the PSFCHs to be powered down and / or discarded are determined based on the terminal implementation of the terminal itself. The method according to claim 11, characterized in that The PSFCH corresponding to the primary carrier or the default carrier is not power-reduced and / or discarded. The method according to any one of claims 2 to 10, characterized in that The y2 is equal to the y1; the total transmission power of the PSFCH corresponding to the x-th carrier is determined by the number of PSFCHs corresponding to the x-th carrier and the PSFCH transmission power corresponding to the x-th carrier, wherein x is a positive integer, and the PSFCH transmission power corresponding to the x-th carrier represents the transmission power of a single PSFCH on the x-th carrier. The method according to claim 14, characterized in that The PSFCH transmit power corresponding to the x-th carrier is determined based on the first PSFCH transmit power and the second PSFCH transmit power; wherein, the first PSFCH transmit power indicates the transmit power of a single PSFCH on the x-th carrier determined by the terminal, the second PSFCH transmit power indicates the configured transmit power of a single PSFCH on the x-th carrier, and the first PSFCH transmit power is determined based on the second PSFCH transmit power, the total transmit power of the PSFCH corresponding to the x-th carrier and the first maximum transmit power. A side link communication method, characterized in that: The method is executed by the second terminal, and the method includes: receiving a side link feedback channel PSFCH corresponding to multiple carriers transmitted using a first power, wherein there is a time domain overlap between the PSFCHs of at least some carriers among the PSFCHs corresponding to the multiple carriers, and the first power is less than or equal to a pre-set first maximum transmission power. The method according to claim 16, characterized in that The PSFCHs corresponding to the multiple carriers have y1 PSFCHs to be sent; the received PSFCHs corresponding to the multiple carriers are determined in the following way: if the total transmission power of the y1 PSFCHs to be sent is greater than a preset first maximum transmission power, power adjustment is performed on the y1 PSFCHs to be sent or the PSFCHs are discarded to obtain y2 PSFCHs, wherein the total transmission power of the y2 PSFCHs is the first power, and y2 is less than or equal to y1. The method according to claim 17, characterized in that The power adjustment or PSFCH discarding of the y1 PSFCHs to be sent includes: if the total transmission power of the PSFCHs to be sent corresponding to the R-th bandwidth is greater than the second maximum transmission power corresponding to the R-th bandwidth, power adjustment or PSFCH discarding of the PSFCH to be sent corresponding to the R-th bandwidth; wherein, in all bandwidths occupied by sending the PSFCH, the sum of the second maximum transmission powers corresponding to each bandwidth is equal to the first maximum transmission power; the second maximum transmission power is based on high-level signaling configuration, or the second maximum transmission power is determined based on the total transmission power of the PSFCHs to be sent corresponding to all bandwidths, the total transmission power of the PSFCHs to be sent corresponding to the R-th bandwidth and the first maximum transmission power, and R is a positive integer. The method according to claim 17, characterized in that The y2 is smaller than the y1; the power adjustment or PSFCH discarding of the y1 PSFCHs to be sent to obtain y2 PSFCHs includes: based on the priority corresponding to the PSFCHs to be sent, reducing the power of the PSFCH with the lowest priority among the y1 PSFCHs to be sent; if the total transmission power after the power reduction is greater than the first maximum transmission power, discarding the PSFCH with power reduction; until the total transmission power of the PSFCH is less than or equal to the preset first maximum transmission power, the y2 PSFCHs are obtained. The method according to claim 17 or 18, characterized in that The y2 is equal to the y1; the total transmission power of the PSFCH corresponding to the x-th carrier is determined by the number of PSFCHs corresponding to the x-th carrier and the PSFCH transmission power corresponding to the x-th carrier, wherein x is a positive integer, and the PSFCH transmission power corresponding to the x-th carrier represents the transmission power of a single PSFCH on the x-th carrier. A side link communication method, characterized in that: The method includes: a first terminal uses a first power to send a side link feedback channel PSFCH corresponding to multiple carriers, wherein there is a time domain overlap between the PSFCHs of at least some carriers among the PSFCHs corresponding to the multiple carriers, and the first power is less than or equal to a preset first maximum transmission power; and a second terminal receives the PSFCHs corresponding to the multiple carriers sent by the first terminal using the first power. A first terminal, characterized in that: include: Transceiver module; The transceiver module is used to send a side link feedback channel PSFCH corresponding to multiple carriers using a first power, wherein there is a time domain overlap between the PSFCHs of at least some carriers among the PSFCHs corresponding to the multiple carriers, and the first power is less than or equal to a pre-set first maximum transmission power. A second terminal, characterized in that: include: Transceiver module; The transceiver module is used to receive a side link feedback channel PSFCH corresponding to multiple carriers transmitted using a first power, wherein there is a time domain overlap between the PSFCHs of at least some carriers among the PSFCHs corresponding to the multiple carriers, and the first power is less than or equal to a pre-set first maximum transmission power. A first terminal, characterized in that: include: One or more processors; wherein the first terminal is used to execute the side link communication method described in any one of claims 1-15. A second terminal, characterized in that: include: One or more processors; wherein the second terminal is used to execute the side link communication method described in any one of claims 16-20. A communication system, characterized in that: It includes a first terminal and a second terminal, wherein the first terminal is configured to implement the side link communication method described in any one of claims 1-15, and the second terminal is configured to implement the side link communication method described in any one of claims 16-20. A storage medium stores instructions, characterized in that: When the instruction is executed on a communication device, the communication device is caused to execute the side link communication method as described in any one of claims 1-15 or 16-20.

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