A side link SL communication method and device

Abstract

The disclosed embodiment discloses a side link SL communication method and device thereof, wherein the method comprises: a first terminal determines that the number of continuous discontinuous transmissions DTX of a first carrier based on hybrid automatic repeat request HARQ feedback meets a first condition; wherein the first carrier is one or more carriers supported by a first unicast connection between the first terminal and the second terminal; the second terminal is any terminal having a unicast connection with the first terminal; obtaining first information; and according to the first information, the first terminal determines whether to restore the first carrier. By implementing the disclosed embodiment, the first terminal can determine whether to restore the first carrier according to the first information when it is determined that the number of continuous discontinuous transmissions DTX of a first carrier based on hybrid automatic repeat request HARQ feedback meets the first condition. Thereby ensuring that the first terminal promptly restores the use of the first carrier to improve the utilization rate of communication resources.

Description

A sidelink (SL) communication method and device thereof Technical Field

[0001] The present disclosure relates to the field of communication technology, and in particular to a sidelink (SL) communication method and apparatus thereof. Background Art

[0002] In related technologies, when a terminal device autonomously selects resources from a network configuration or pre-configured resource pool for sidelink communication, if the DTX count based on HARQ feedback of a carrier reaches a maximum value, the terminal device cannot determine when the carrier can be restored to use.

[0003] Summary of the Invention

[0004] The embodiments of the present disclosure provide a sidelink (SL) communication method and apparatus thereof.

[0005] According to the first aspect of an embodiment of the present disclosure, a side link SL communication method is proposed, including: a first terminal determines that the number of continuous and discontinuous transmissions DTX of a first carrier based on hybrid automatic repeat request HARQ feedback meets a first condition; wherein, the first carrier is one or more carriers supported by a first unicast connection between the first terminal and the second terminal; the second terminal is any terminal that has a unicast connection with the first terminal; obtaining first information; based on the first information, the first terminal determines whether to restore the first carrier.

[0006] According to the second aspect of an embodiment of the present disclosure, a side link (SL) communication method is proposed, including: a network device sends first information to a first terminal; wherein, the first information is used to instruct the first terminal to determine whether to restore the first carrier when the number of continuous and discontinuous transmissions (DTX) of the first carrier based on hybrid automatic repeat request (HARQ) feedback meets a first condition, wherein the first carrier is one or more carriers supported by the first unicast connection between the first terminal and the second terminal.

[0007] According to a third aspect of an embodiment of the present disclosure, a first communication device is proposed, including: a processing module, used to determine whether the number of continuous and discontinuous transmissions DTX of the first carrier based on hybrid automatic repeat request HARQ feedback meets a first condition; wherein, the first carrier is one or more carriers supported by the first unicast connection between the first communication device and the second terminal; the second terminal is any terminal that has a unicast connection with the first communication device; the processing module is also used to obtain first information; the processing module is also used to determine whether the first communication device restores the first carrier based on the first information.

[0008] According to the fourth aspect of an embodiment of the present disclosure, a second communication device is proposed, including: a transceiver module, used to send first information to a first terminal; wherein, the first information is used to instruct the first terminal to determine whether to restore the first carrier when the number of continuous and discontinuous transmissions DTX of the first carrier based on hybrid automatic repeat request HARQ feedback meets a first condition, wherein the first carrier is one or more carriers supported by the first unicast connection between the first terminal and the second terminal.

[0009] According to a fifth aspect of an embodiment of the present disclosure, a communication system is proposed, comprising: a first terminal configured to execute an optional implementation method of the aforementioned first aspect; and a network device configured to execute an optional implementation method of the aforementioned second aspect.

[0010] According to a sixth aspect of an embodiment of the present disclosure, a communication device is provided, including: one or more processors;

[0011] The processor is used to call instructions to enable the communication device to execute the optional implementation of the first and second aspects mentioned above.

[0012] According to a seventh 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 optional implementation methods of the aforementioned first and second aspects. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the following drawings required for describing the embodiments are introduced. The following drawings are merely some embodiments of the present disclosure and do not impose specific limitations on the protection scope of the present disclosure.

[0014] FIG1 is a schematic diagram of the architecture of a communication system provided by an embodiment of the present disclosure;

[0015] FIG2A is an interactive schematic diagram illustrating a sidelink SL communication method according to an embodiment of the present disclosure;

[0016] FIG2B is an interactive schematic diagram illustrating a sidelink SL communication method according to an embodiment of the present disclosure;

[0017] FIG3A is a schematic diagram showing a flow chart of a sidelink SL communication method according to an embodiment of the present disclosure;

[0018] FIG3B is a schematic diagram showing a flow chart of a sidelink SL communication method according to an embodiment of the present disclosure;

[0019] FIG3C is a schematic diagram showing a flow chart of a sidelink SL communication method according to an embodiment of the present disclosure;

[0020] FIG3D is a schematic diagram showing a flow chart of a sidelink SL communication method according to an embodiment of the present disclosure;

[0021] FIG4A is a schematic diagram showing a flow chart of a sidelink SL communication method according to an embodiment of the present disclosure;

[0022] FIG4B is a schematic diagram showing a flow chart of a sidelink SL communication method according to an embodiment of the present disclosure;

[0023] FIG4C is a schematic diagram showing a flow chart of a sidelink SL communication method according to an embodiment of the present disclosure;

[0024] FIG5 is an interactive schematic diagram illustrating a sidelink SL communication method according to an embodiment of the present disclosure;

[0025] FIG6A is a schematic diagram illustrating a sidelink SL communication method according to an embodiment of the present disclosure;

[0026] FIG6B is a schematic diagram illustrating a sidelink SL communication method according to an embodiment of the present disclosure;

[0027] FIG7A is a schematic structural diagram of a first terminal 7100 proposed in an embodiment of the present disclosure;

[0028] FIG7B is a schematic diagram of the structure of a network device 7200 proposed in an embodiment of the present disclosure;

[0029] FIG8A is a schematic structural diagram of a communication device 8100 proposed in an embodiment of the present disclosure;

[0030] FIG8B is a schematic structural diagram of a chip 8200 according to an embodiment of the present disclosure. DETAILED DESCRIPTION

[0031] The embodiments of the present disclosure provide a sidelink (SL) communication method and apparatus thereof.

[0032] In the first aspect, an embodiment of the present disclosure proposes a side link SL communication method, including: a first terminal determines that the number of continuous and discontinuous transmissions DTX of a first carrier based on hybrid automatic repeat request HARQ feedback meets a first condition; wherein, the first carrier is one or more carriers supported by a first unicast connection between the first terminal and the second terminal; the second terminal is any terminal that has a unicast connection with the first terminal; obtaining first information; based on the first information, the first terminal determines whether to restore the first carrier.

[0033] In the above embodiment, the terminal device may determine whether to resume the first carrier based on the acquired first information when it is determined that the number of consecutive discontinuous transmissions (DTX) of the first carrier based on hybrid automatic repeat request (HARQ) feedback meets the first condition. This ensures that the first terminal resumes use of the first carrier in a timely manner to improve communication resource utilization.

[0034] In combination with some embodiments of the first aspect, in some embodiments, the first information includes a timer configured by a network device; the first terminal determines whether to restore the first carrier based on the first information, including: determining the timer associated with the first carrier based on the first information; starting the timer associated with the first carrier; determining that the timer associated with the first carrier times out, the first terminal determines to restore the first carrier, or determining that during the running period of the timer associated with the first carrier, the first terminal determines not to restore the first carrier.

[0035] In the above embodiment, upon determining that the number of consecutive discontinuous transmissions (DTX) of the first carrier based on hybrid automatic repeat request (HARQ) feedback meets the first condition, the terminal device may determine whether to resume the first carrier based on a timer configured by the network-side device. This ensures that the first terminal resumes use of the first carrier in a timely manner, thereby improving communication resource utilization.

[0036] In combination with some embodiments of the first aspect, in some embodiments, the timer is configured according to a specified granularity, wherein the specified granularity is any one of the following: carrier granularity; bandwidth part BWP granularity; terminal granularity.

[0037] In combination with some embodiments of the first aspect, in some embodiments, the first information includes measurement configuration information; the first terminal determines whether to restore the first carrier based on the first information, including: performing measurement according to the measurement configuration information, and determining the measurement result associated with the first carrier; based on the measurement result, the first terminal determines whether to restore the first carrier.

[0038] In the above embodiment, upon determining that the number of consecutive discontinuous transmissions (DTX) of the first carrier based on hybrid automatic repeat request (HARQ) feedback meets the first condition, the terminal device may perform measurements based on the measurement configuration information configured by the network-side device, and determine whether to resume the first carrier based on the measurement results. This ensures that the first terminal resumes use of the first carrier in a timely manner, thereby improving communication resource utilization.

[0039] In combination with some embodiments of the first aspect, in some embodiments, based on the measurement result, the first terminal determines whether to restore the first carrier, including at least one of the following: determining that the measurement result is less than or equal to a preset threshold, the first terminal determines to restore the first carrier; determining that the measurement result is greater than or equal to the preset threshold, the first terminal determines not to restore the first carrier.

[0040] In combination with some embodiments of the first aspect, in some embodiments, the first terminal determines to resume the first carrier, including: determining to resume using resources on the first carrier to receive and / or send SL data.

[0041] In combination with some embodiments of the first aspect, in some embodiments, the first terminal determines not to restore the first carrier, including: determining that the first terminal selects a first resource to receive and / or send SL data during resource selection and / or reselection, wherein the first resource is a resource not on the first carrier.

[0042] In combination with some embodiments of the first aspect, in some embodiments, the measurement configuration information includes at least one of the following: received signal strength indication RSSI measurement configuration; reference signal received power RSRP measurement configuration; channel occupancy rate CO measurement configuration; channel busy rate CBR measurement configuration.

[0043] In combination with some embodiments of the first aspect, in some embodiments, the measurement configuration information includes the CBR measurement configuration; the measurement according to the measurement configuration information to determine the measurement result associated with the first carrier includes: performing CBR measurement on the first resource pool of the first carrier according to the CBR measurement configuration, and determining the CBR measurement result of the first resource pool on the first carrier; and determining the CBR measurement result of the first resource pool as the CBR measurement result associated with the first carrier.

[0044] In combination with some embodiments of the first aspect, in some embodiments, the first resource pool is the first resource pool selected by the first terminal on the first carrier.

[0045] In combination with some embodiments of the first aspect, in some embodiments, the method further includes at least one of the following: obtaining the preset threshold through network device configuration or pre-configuration; and determining the preset threshold based on the first terminal implementation.

[0046] In combination with some embodiments of the first aspect, in some embodiments, determining that the number of continuous discontinuous transmissions DTX of the first carrier based on HARQ feedback meets the first condition includes: obtaining a first threshold; for the first unicast connection, determining that the number of continuous DTX of the first carrier based on HARQ feedback is greater than or equal to the first threshold; determining that the number of continuous DTX of the first carrier based on HARQ feedback meets the first condition.

[0047] In combination with some embodiments of the first aspect, in some embodiments, determining the number of consecutive DTXs of the first carrier based on HARQ feedback includes: for the first unicast connection, determining whether the first terminal receives hybrid automatic repeat request HARQ feedback information at the physical sidelink feedback channel PSFCH reception timing associated with the physical sidelink shared channel PSSCH transmission on the first carrier; for the first unicast connection, determining that the first terminal does not receive HARQ feedback information at the PSFCH reception timing associated with the PSSCH transmission on the first carrier, and determining to update the number of consecutive DTXs of the first carrier based on HARQ feedback.

[0048] In combination with some embodiments of the first aspect, in some embodiments, determining to update the number of consecutive DTXs of the first carrier based on HARQ feedback includes: determining the number of consecutive DTXs of the first carrier based on HARQ feedback plus 1.

[0049] In combination with some embodiments of the first aspect, in some embodiments, the method further includes: for the first unicast connection, determining that the first terminal receives HARQ feedback information at the PSFCH reception timing associated with the PSSCH transmission on the first carrier, and determining that the number of consecutive DTXs of the first carrier based on HARQ feedback is reset to 0.

[0050] In combination with some embodiments of the first aspect, in some embodiments, the SL data includes at least one of the following: PSSCH; physical sidelink control channel PSCCH; PSFCH; synchronization signal block SSB.

[0051] In combination with some embodiments of the first aspect, in some embodiments, the sidelink transmission resources of the first terminal are allocated by autonomously selecting sidelink transmission resources or network device scheduling transmission resources, wherein the first terminal is in any state: wireless resource control RRC connected state; RRC idle state; RRC inactive state; out-of-coverage state.

[0052] In the second aspect, an embodiment of the present disclosure proposes a side link SL communication method, including: a network device sends first information to a first terminal; wherein, the first information is used to instruct the first terminal to determine whether to restore the first carrier when the number of continuous and discontinuous transmissions DTX of the first carrier based on hybrid automatic repeat request HARQ feedback meets a first condition, wherein the first carrier is one or more carriers supported by the first unicast connection between the first terminal and the second terminal.

[0053] In combination with some embodiments of the second aspect, in some embodiments, the first information includes a timer, and the timer is used to indicate whether the first terminal restores the first carrier.

[0054] In combination with some embodiments of the second aspect, in some embodiments, the timer is configured according to a specified granularity, wherein the specified granularity is any one of the following: carrier granularity; bandwidth part BWP granularity; terminal granularity.

[0055] In combination with some embodiments of the second aspect, in some embodiments, the first information includes measurement configuration information, and the measurement configuration information is used by the first terminal to perform measurement and determine the measurement result associated with the first carrier, and the measurement result is used to instruct the first terminal to determine whether to restore the first carrier.

[0056] In combination with some embodiments of the second aspect, in some embodiments, the measurement configuration information includes at least one of the following: received signal strength indication RSSI measurement configuration; reference signal received power RSRP measurement configuration; channel occupancy rate CO measurement configuration; channel busy rate CBR measurement configuration.

[0057] In combination with some embodiments of the second aspect, in some embodiments, the method further includes: sending a preset threshold to the first terminal; wherein the preset threshold is used by the first terminal to determine whether to restore the first carrier based on the measurement result.

[0058] In combination with some embodiments of the second aspect, in some embodiments, the method further includes: sending a first threshold to the first terminal; wherein the first threshold is used by the first terminal to determine whether the number of consecutive DTXs of the first carrier based on requesting HARQ feedback meets the first condition.

[0059] In a third aspect, an embodiment of the present disclosure proposes a first communication device, comprising: a processing module, used to determine whether the number of continuous and discontinuous transmissions DTX of the first carrier based on hybrid automatic repeat request HARQ feedback meets a first condition; wherein, the first carrier is one or more carriers supported by the first unicast connection between the first communication device and the second terminal; the second terminal is any terminal that has a unicast connection with the first communication device; the processing module is also used to obtain first information; the processing module is also used to determine whether the first communication device restores the first carrier based on the first information.

[0060] In combination with some embodiments of the third aspect, in some embodiments, the first information includes a timer configured by a network device; the processing module is specifically used to: determine the timer associated with the first carrier based on the first information; start the timer associated with the first carrier; determine that the timer associated with the first carrier times out, and the first terminal determines to restore the first carrier, or determine that during the running period of the timer associated with the first carrier, the first terminal determines not to restore the first carrier.

[0061] In combination with some embodiments of the third aspect, in some embodiments, the timer is configured according to a specified granularity, wherein the specified granularity is any one of the following: carrier granularity; bandwidth part BWP granularity; terminal granularity.

[0062] In combination with some embodiments of the third aspect, in some embodiments, the first information includes measurement configuration information; based on the first information, the processing module is specifically intended to: perform measurement according to the measurement configuration information, and determine the measurement result associated with the first carrier; based on the measurement result, the first terminal determines whether to restore the first carrier.

[0063] In combination with some embodiments of the third aspect, in some embodiments, the processing module is specifically used to perform at least one of the following steps: determining that the measurement result is less than or equal to a preset threshold, and the first terminal determines to restore the first carrier; determining that the measurement result is greater than or equal to the preset threshold, and the first terminal determines not to restore the first carrier.

[0064] In combination with some embodiments of the third aspect, in some embodiments, the processing module is specifically used to: determine to resume using resources on the first carrier to receive and / or send SL data.

[0065] In combination with some embodiments of the third aspect, in some embodiments, the processing module is specifically used to: determine that the first terminal selects a first resource to receive and / or send SL data during resource selection and / or reselection, wherein the first resource is a resource not on the first carrier.

[0066] In combination with some embodiments of the third aspect, in some embodiments, the measurement configuration information includes at least one of the following: received signal strength indication RSSI measurement configuration; reference signal received power RSRP measurement configuration; channel occupancy rate CO measurement configuration; channel busy rate CBR measurement configuration.

[0067] In combination with some embodiments of the third aspect, in some embodiments, the measurement configuration information includes the CBR measurement configuration; the processing module is specifically used to: perform CBR measurement on the first resource pool of the first carrier according to the CBR measurement configuration, and determine the CBR measurement result of the first resource pool on the first carrier; determine the CBR measurement result of the first resource pool as the CBR measurement result associated with the first carrier.

[0068] In combination with some embodiments of the third aspect, in some embodiments, the first resource pool is the first resource pool selected by the first terminal on the first carrier.

[0069] In combination with some embodiments of the third aspect, in some embodiments, the device also includes: a transceiver module, used to obtain the preset threshold through network device configuration or pre-configuration; the processing module is also used to: determine the preset threshold based on the first terminal implementation.

[0070] In combination with some embodiments of the third aspect, in some embodiments, the processing module is specifically used to: obtain a first threshold; for the first unicast connection, determine that the number of consecutive DTXs of the first carrier based on HARQ feedback is greater than or equal to the first threshold; determine that the number of consecutive DTXs of the first carrier based on HARQ feedback meets the first condition.

[0071] In combination with some embodiments of the third aspect, in some embodiments, the processing module is specifically used to: for the first unicast connection, determine whether the first terminal receives hybrid automatic repeat request HARQ feedback information at the PSFCH reception timing associated with the PSSCH transmission on the first carrier; for the first unicast connection, determine whether the first terminal does not receive HARQ feedback information at the PSFCH reception timing associated with the PSSCH transmission on the first carrier, and determine to update the number of consecutive DTXs of the first carrier based on HARQ feedback.

[0072] In combination with some embodiments of the third aspect, in some embodiments, the processing module is specifically used to: determine the number of consecutive DTXs of the first carrier based on HARQ feedback plus 1.

[0073] In combination with some embodiments of the third aspect, in some embodiments, the processing module is specifically used to: for the first unicast connection, determine that the first terminal receives HARQ feedback information at the PSFCH reception timing associated with the PSSCH transmission on the first carrier, and determine that the number of consecutive DTXs of the first carrier based on HARQ feedback is reset to 0.

[0074] In combination with some embodiments of the third aspect, in some embodiments, the SL data includes at least one of the following: physical sidelink shared channel PSSCH; physical sidelink control channel PSCCH; physical sidelink feedback channel PSFCH synchronization signal block SSB.

[0075] In combination with some embodiments of the third aspect, in some embodiments, the sidelink transmission resources of the first terminal are allocated by autonomously selecting sidelink transmission resources or network device scheduling transmission resources, wherein the first terminal is in any state: wireless resource control RRC connected state; RRC idle state; RRC inactive state; out-of-coverage state.

[0076] In a fourth aspect, an embodiment of the present disclosure proposes a second communication device, comprising: a transceiver module, used to send first information to a first terminal; wherein, the first information is used to indicate that when the number of continuous and discontinuous transmissions DTX of the first carrier based on hybrid automatic repeat request HARQ feedback meets a first condition, the first terminal determines whether to restore the first carrier, wherein the first carrier is one or more carriers supported by the first unicast connection between the first terminal and the second terminal.

[0077] In combination with some embodiments of the fourth aspect, in some embodiments, the first information includes a timer, and the timer is used to indicate whether the first terminal restores the first carrier.

[0078] In combination with some embodiments of the fourth aspect, in some embodiments, the timer is configured according to a specified granularity, wherein the specified granularity is any one of the following: carrier granularity; bandwidth part BWP granularity; terminal granularity.

[0079] In combination with some embodiments of the fourth aspect, in some embodiments, the first information includes measurement configuration information, and the measurement configuration information is used by the first terminal to perform measurement and determine the measurement result associated with the first carrier, and the measurement result is used to instruct the first terminal to determine whether to restore the first carrier.

[0080] In combination with some embodiments of the fourth aspect, in some embodiments, the measurement configuration information includes at least one of the following: received signal strength indication RSSI measurement configuration; reference signal received power RSRP measurement configuration; channel occupancy rate CO measurement configuration; channel busy rate CBR measurement configuration.

[0081] In combination with some embodiments of the fourth aspect, in some embodiments, the transceiver module is further used to: send a preset threshold to the first terminal; wherein the preset threshold is used by the first terminal to determine whether to restore the first carrier based on the measurement result.

[0082] In combination with some embodiments of the fourth aspect, in some embodiments, the transceiver module is also used to: send a first threshold to the first terminal; wherein the first threshold is used by the first terminal to determine whether the number of consecutive DTXs of the first carrier based on requesting HARQ feedback meets the first condition.

[0083] In a fifth aspect, an embodiment of the present disclosure proposes a communication system, comprising: a first communication device, configured as an optional implementation of the aforementioned first aspect; and a second communication device, configured to execute the optional implementation of the aforementioned second aspect.

[0084] In a sixth aspect, an embodiment of the present disclosure proposes a communication device, comprising: one or more processors; wherein the processor is used to call instructions to enable the communication device to execute the optional implementation method of the aforementioned first aspect.

[0085] In a seventh aspect, an embodiment of the present disclosure proposes a communication device, comprising: one or more processors; wherein the processor is used to call instructions to enable the communication device to execute the optional implementation method of the aforementioned second aspect.

[0086] In an eighth aspect, an embodiment of the present disclosure proposes a storage medium storing instructions. When the instructions are executed on a communication device, the communication device executes optional implementation methods of the aforementioned first and second aspects.

[0087] In a ninth aspect, an embodiment of the present disclosure proposes a program product. When the program product is executed by a communication device, the communication device executes the method described in the optional implementation of the first and second aspects.

[0088] In a tenth aspect, an embodiment of the present disclosure proposes a computer program, which, when executed on a computer, enables the computer to execute the method described in the optional implementation of the first and second aspects.

[0089] In an eleventh aspect, an embodiment of the present disclosure provides a chip or a chip system, wherein the chip or chip system includes a processing circuit configured to execute the method described in the optional implementation of the first and second aspects above.

[0090] It is understandable that the first communication device, the second communication device, the network device, the communication system, the storage medium, the program product, the computer program, the chip, or the chip system are all used to perform the method proposed in the embodiment of the present disclosure. Therefore, the beneficial effects that can be achieved can refer to the beneficial effects of the corresponding method and will not be repeated here.

[0091] The present disclosure provides a sidelink SL communication method and apparatus thereof. In some embodiments, terms such as sidelink SL communication method, information processing method, and communication method are interchangeable; terms such as sidelink SL communication apparatus, information processing apparatus, and communication apparatus are interchangeable; and terms such as sidelink SL communication system, information processing system, and communication system are interchangeable.

[0092] The embodiments of the present disclosure are not exhaustive and 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 steps of different embodiments can be arbitrarily combined, and a certain embodiment can be arbitrarily combined with the optional implementation methods of other embodiments.

[0093] In each embodiment of the present disclosure, unless otherwise specified or provided for by logic, the terms and / or descriptions between the embodiments are consistent and can be referenced by each other. The technical features in different embodiments can be combined to form a new embodiment based on their inherent logical relationships.

[0094] 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.

[0095] In the embodiments of the present disclosure, unless otherwise specified, elements expressed in the singular, such as "a", "an", "the", "above", "said", "the", "the", 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 following the article may be understood as a singular expression or a plural expression.

[0096] In the embodiments of the present disclosure, “plurality” refers to two or more.

[0097] In some embodiments, the terms "at least one," "one or more," "a plurality of," "multiple," etc. may be used interchangeably.

[0098] In some embodiments, descriptions such as "at least one of A and B," "A and / or B," "A in one case, B in another case," or "in response to one case A, in response to another case B" may include the following technical solutions depending on 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); and in some embodiments, A and B (both A and B are executed). The above is also applicable when there are more branches such as A, B, and C.

[0099] In some embodiments, "A or B" and other descriptions may include the following technical solutions depending on 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). The above is also applicable when there are more branches such as A, B, C, etc.

[0100] 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 any restriction on the position, order, priority, quantity or content of the description objects. For the statement of the description object, please refer to the description in the context of the claims or embodiments, and no unnecessary restriction should be constituted 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". "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 "first device" as an example, the number of "devices" can be one or more. In addition, the objects modified by different prefixes can be the same or different. For example, if the description object is "device", then the "first device" and the "second device" can be the same device or different devices, and their types can be the same or different; for another example, if the description object is "information", then the "first information" and the "second information" can be the same information or different information, and their contents can be the same or different.

[0101] 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.

[0102] 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.

[0103] 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 less 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", "not more than", "lower than", "lower than or equal to", "not higher than", and "below" can be replaced with each other.

[0104] In some embodiments, devices and equipment can be interpreted as physical or virtual, and their names are not limited to the names recorded in the embodiments. In some cases, they can also be understood as "equipment", "device", "circuit", "network element", "node", "function", "unit", "section", "system", "network", "chip", "chip system", "entity", "subject", etc.

[0105] In some embodiments, "network" can be interpreted as devices included in the network, such as access network equipment, core network equipment, etc.

[0106] 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", "fixed station", and in some embodiments may also be understood as "node", "access point", "transmission point (TP)", "reception point (RP)", "transmission and / or reception point (TRP)" "panel", "antenna panel", "antenna array", "cell", "macro cell", "small cell", "femto cell", "pico cell", "sector", "cell group", "serving cell", "carrier", "component carrier", "bandwidth part (BWP)", etc.

[0107] In some embodiments, "terminal" or "terminal device" may 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.

[0108] In some embodiments, obtaining data, information, etc. may comply with the laws and regulations of the country where the data is obtained.

[0109] In some embodiments, data, information, etc. may be obtained with the user's consent.

[0110] Figure 1 is a schematic diagram of the architecture of a communication system according to an embodiment of the present disclosure. The communication system may include, but is not limited to, a first terminal and a network device. The number and configuration of devices shown in Figure 1 are for example purposes only and do not limit the present disclosure. In actual applications, two or more first terminals and two or more network devices may be included. The communication system 100 shown in Figure 1 includes, for example, a first terminal 101 and a network device 102.

[0111] In some embodiments, the terminal herein may be an entity on the user side for receiving or transmitting signals, such as a mobile phone. It may also be referred to as a terminal, user equipment (UE), mobile station (MS), mobile terminal (MT), etc. The terminal may be a car with communication functions, a smart car, a mobile phone, a wearable device, a tablet computer (Pad), a computer with wireless transceiver functions, a virtual reality (VR) terminal, an augmented reality (AR) terminal, a wireless terminal in industrial control, a wireless terminal in self-driving, a wireless terminal in remote medical surgery, a wireless terminal in a smart grid, a wireless terminal in transportation safety, a wireless terminal in a smart city, a wireless terminal in a smart home, etc. The embodiments of the present disclosure do not limit the specific technology and specific device form adopted by the terminal.

[0112] In some embodiments, the network device herein may be an access network device. In some embodiments, the access network device is, for example, a node or device that connects a terminal device to a wireless network. The access network device may include, but is not limited to, at least one of an evolved NodeB (eNB), a next generation evolved NodeB (ng-eNB), a next generation NodeB (gNB), a NodeB (NB), a home nodeB (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 RAN, a cloud RAN, a base station in other communication systems, and an access node in a Wi-Fi system.

[0113] In some embodiments, the technical solution of the present disclosure can be applied 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 can be transformed into internal interfaces of the Open RAN, and the processes and information interactions between these internal interfaces can be implemented through software or programs.

[0114] In some embodiments, the access network device can be composed of a centralized unit (CU) and a distributed unit (DU), where the CU can also be called a control unit. The CU-DU structure can be used to split the protocol layer of the access network device, with the functions of some protocol layers centrally controlled by the CU, and the functions of the remaining part or all of the protocol layers distributed in the DU, which is centrally controlled by the CU, but is not limited to this.

[0115] 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. Ordinary technicians in this field 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.

[0116] Figure 1 is a schematic diagram of the architecture of a communication system according to an embodiment of the present disclosure. The communication system may include, but is not limited to, a first terminal and a network device. The number and configuration of devices shown in Figure 1 are for example purposes only and do not limit the present disclosure. In actual applications, two or more first terminals and two or more network devices may be included. The communication system 100 shown in Figure 1 includes, for example, a first terminal 101 and a network device 102.

[0117] In some embodiments, the terminal herein may be an entity on the user side for receiving or transmitting signals, such as a mobile phone. It may also be referred to as a terminal, user equipment (UE), mobile station (MS), mobile terminal (MT), etc. The terminal may be a car with communication functions, a smart car, a mobile phone, a wearable device, a tablet computer (Pad), a computer with wireless transceiver functions, a virtual reality (VR) terminal, an augmented reality (AR) terminal, a wireless terminal in industrial control, a wireless terminal in self-driving, a wireless terminal in remote medical surgery, a wireless terminal in a smart grid, a wireless terminal in transportation safety, a wireless terminal in a smart city, a wireless terminal in a smart home, etc. The embodiments of the present disclosure do not limit the specific technology and specific device form adopted by the terminal.

[0118] In some embodiments, the network device herein may be an access network device. In some embodiments, the access network device is, for example, a node or device that connects a terminal device to a wireless network. The access network device may include, but is not limited to, at least one of an evolved NodeB (eNB), a next generation evolved NodeB (ng-eNB), a next generation NodeB (gNB), a NodeB (NB), a home nodeB (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 RAN, a cloud RAN, a base station in other communication systems, and an access node in a Wi-Fi system.

[0119] To support direct communication between UEs, a sidelink communication mode is introduced. Based on the correspondence between information transmission and reception between UEs, the two UEs performing sidelink communication can be divided into a transmitting UE and a receiving UE. The transmitting UE sends SCI (Sidelink Control Information) on the PSCCH (Physical Sidelink Control Channel) and a second-stage SCI on the PSSCH (Physical Sidelink Shared Channel). The SCI carries information such as the resource location of the transmitted data and the source and destination identifiers. For data packets with HARQ (Hybrid Automatic Repeat reQuest) feedback enabled, the receiving UE provides HARQ-ACK (Hybrid Automatic Repeat request-ACKnowledgement) feedback on the PSSCH (Physical sidelink feedback channel).

[0120] Sidelink communication uses two transmission resource allocation methods: one is dynamic network scheduling, referred to as Mode 1, and the other is the UE's autonomous selection from a network-configured or pre-configured resource pool, referred to as Mode 2. Dynamic network scheduling involves the network equipment dynamically allocating sidelink transmission resources to the UE based on the buffered data reported by the UE, while autonomous selection involves the UE randomly selecting transmission resources from a network-configured or pre-configured resource pool. Network equipment can configure multiple resource pools for a UE on a single BWP. The network configures the UE's specific allocation method through RRC signaling.

[0121] NR-U (New Radio in Unlicensed Spectrum, a new air interface operating in unlicensed frequency bands) is a project established by 3GPP (3rd Generation Partnership Project) in R16, which can provide operators with the necessary technical support to fully integrate unlicensed spectrum into 5G networks. NR-U supports uplink and downlink operations in unlicensed frequency bands. In NR-U, channel access for both downlink and uplink relies on the listen before talk (LBT) feature. The communication device must first "sense" the communication channel before communicating, and no communication is detected before transmission. When a communication channel is an unlicensed wideband carrier, the LBT process relies on detecting signal strength on multiple sub-bands of the communication channel. LBT parameters (for example, type / duration, clear channel assessment parameters, etc.) are configured by the base station.

[0122] R16 introduces a SL (Sidelink) RLF (radio link failure) radio link failure detection mechanism based on HARQ feedback. For a unicast connection, if the UE does not receive a certain number of consecutive DTXs (Discontinuous Transmissions) with HARQ feedback on the PSFCH resource, the UE considers that the unicast connection has experienced a SL RLF based on HARQ feedback and notifies the RRC layer. The RRC controls the SL RLF detection based on HARQ feedback by configuring the maximum number of consecutive DTXs sl-maxNumConsecutiveDTX per UE. At the same time, the UE maintains a numConsecutiveDTX variable for each unicast connection, which is used to count the number of consecutive DTXs for this unicast connection. When the unicast connection is established or sl-maxNumConsecutiveDTX is reconfigured / initialized, the UE initializes the variable numConsecutiveDTX corresponding to the unicast connection to 0. The UE counts whether DTX occurs for each PSFCH reception opportunity associated with each PSSCH transmission of this unicast connection. If no HARQ feedback is received on the PSFCH opportunity, the UE increments the variable numConsecutiveDTX corresponding to the unicast connection by 1. When the variable numConsecutiveDTX corresponding to the unicast connection reaches the maximum value sl-maxNumConsecutiveDTX, the UE considers that a SL RLF based on HARQ feedback has occurred for this unicast connection and notifies the RRC layer. If the UE receives HARQ feedback on the PSFCH opportunity, the UE initializes the variable numConsecutiveDTX corresponding to the unicast connection to 0.

[0123] The sidelink support in Release 18 already supports carrier aggregation, and RAN2 has reached a conclusion that one carrier corresponds to one HARQ entity. In the Release 18 carrier aggregation scenario, RAN2 agrees that DTX based on HARQ feedback should be counted on a per-carrier granularity basis.

[0124] In the Sidelink carrier aggregation scenario, if the DTX count based on HARQ feedback of a carrier reaches the maximum value, the terminal device cannot determine when the carrier can be restored to use.

[0125] The SL communication method and apparatus provided by the embodiments of the present disclosure can enable a terminal device to determine whether a carrier can be restored for use based on relevant configuration information when the DTX count based on HARQ feedback of the carrier meets a preset condition, thereby ensuring efficient SL communication.

[0126] FIG2A is an interactive diagram of a sidelink SL communication method according to an embodiment of the present disclosure. As shown in FIG2A , the sidelink SL communication method according to the embodiment of the present disclosure can be applied to the communication system 100. The method includes but is not limited to the following steps:

[0127] Step S2101: The network device 102 sends first information including a timer.

[0128] In some embodiments, the network device 102 sends the first information including the timer to the first terminal 101 .

[0129] In some embodiments, the first terminal 101 receives the first information including the timer.

[0130] In some embodiments, the first terminal 101 receives first information including a timer sent by the network device 102 .

[0131] In some embodiments, the timer is used to indicate whether the first terminal 101 resumes the first carrier.

[0132] In some embodiments, terms such as "first information", "network device indication information", "network device indication", "indication information", and "indication" can be used interchangeably.

[0133] In some embodiments, the timer is configured according to a specified granularity, wherein the specified granularity is any one of the following: carrier granularity; BWP granularity; terminal granularity.

[0134] It should be noted that, in the embodiments of the present disclosure, the granularity used for configuring a timer and the granularity used for maintaining the timer may be the same or different.

[0135] As an example, consider the case where the granularity used for configuring a timer is the same as the granularity used for maintaining the timer. The granularity used for configuring the timer and the granularity used for maintaining the timer are both carrier / BWP granularity. It is understood that since the granularity used for configuring the timer is carrier / BWP granularity, the length of the timer associated with the carrier / BWP is determined based on the length of the timer configured for the carrier / BWP.

[0136] As another example, consider the case where the granularity used for configuring a timer differs from the granularity used for maintaining the timer. The granularity used for configuring the timer is the terminal granularity, while the granularity used for maintaining the timer is the carrier granularity. It is understood that since the granularity used for configuring the timer is the terminal granularity, the length of the timer associated with the carrier aggregated by this terminal is determined based on the length of the timer configured for that terminal.

[0137] Step S2102: The network device 102 sends a first threshold.

[0138] In some embodiments, the network device 102 sends the first threshold to the first terminal 101 .

[0139] In some embodiments, the first terminal 101 receives the above-mentioned first threshold.

[0140] In some embodiments, the first terminal 101 receives a first threshold sent by the network device 102 .

[0141] In some embodiments, the first threshold is used by the first terminal 101 to determine whether the number of consecutive DTXs of the first carrier based on requesting HARQ feedback meets the first condition.

[0142] In some embodiments, terms such as "first threshold value", "first threshold value", "first set value", "threshold value", "set value", and "preset value" can be used interchangeably.

[0143] Step S2103: The first terminal 101 determines the number of consecutive DTXs of the first carrier based on HARQ feedback for the first unicast connection.

[0144] In some embodiments, the sidelink transmission resource allocation method of the first terminal 101 is autonomous selection of the sidelink transmission resource or scheduling of the transmission resource by the network device 102. Optionally, the first terminal 101 is in any of the following states: RRC (Radio Resource Control) connected state; RRC idle state; RRC inactive state; or out-of-coverage state.

[0145] That is, the sidelink SL communication method provided in the embodiment of the present disclosure is applicable to a mode 1 terminal device in the RRC connected state. Alternatively, the sidelink SL communication method provided in the embodiment of the present disclosure is applicable to a mode 2 terminal device in any one of the RRC connected state, RRC idle state, RRC inactive state, and out-of-coverage state. Alternatively, the sidelink SL communication method provided in the embodiment of the present disclosure is applicable to a mode 2 terminal device in any one of the RRC idle state, RRC inactive state, and out-of-coverage state.

[0146] In some embodiments, the first terminal 101 determines, for the first unicast connection, that HARQ feedback information is not received at a PSFCH reception opportunity associated with PSSCH transmission on the first carrier, and determines to update the number of consecutive DTXs of the first carrier based on the HARQ feedback. Optionally, the first terminal 101 determines, for the first unicast connection, that HARQ feedback information is not received at a PSFCH reception opportunity associated with PSSCH transmission on the first carrier, and determines to increase the number of consecutive DTXs of the first carrier based on the HARQ feedback by 1.

[0147] In some embodiments, the first terminal 101 determines that HARQ feedback information is received at a PSFCH reception timing associated with a PSSCH transmission on the first carrier for the first unicast connection, and then determines that the number of consecutive DTXs of the first carrier based on the HARQ feedback is reset to 0.

[0148] It can be understood that after the first terminal 101 sends sidelink data to the second terminal, for HARQ feedback-enabled data, it expects to receive HARQ feedback information returned by the second terminal, and the first terminal can know the resources for the second terminal to send HARQ feedback information. If the second terminal successfully detects the sidelink control channel sent by the first terminal device, it will send HARQ feedback information (for example, HARQ-ACK or HARQ-NACK) to the first terminal device based on the reception / decoding status of the sidelink data. If the second terminal device does not detect the sidelink data, it will not send HARQ feedback information to the first terminal device, or due to poor channel quality, even if the second terminal sends HARQ feedback information to the first terminal, the first terminal cannot receive / decode the HARQ feedback information fed back by the second terminal. At this time, the first terminal device cannot detect the HARQ feedback information of the second terminal device. This situation is called a DTX state.

[0149] In some embodiments, the terms "sidelink," "sidelink," and the like may be used interchangeably.

[0150] Step S2104: The first terminal 101 determines, for the first unicast connection, that the number of consecutive DTXs of the first carrier based on HARQ feedback is greater than or equal to a first threshold.

[0151] Step S2105: The first terminal 101 determines whether the number of consecutive DTXs of the first carrier based on HARQ feedback meets the first condition.

[0152] Exemplarily, the first terminal 101 determines that for the first unicast connection, the number of consecutive DTXs of the first carrier based on HARQ feedback is greater than or equal to the first threshold, then the first terminal 101 determines that the number of consecutive DTXs of the first carrier based on HARQ feedback meets the first condition.

[0153] Step S2106: The first terminal 101 starts a timer associated with the first carrier.

[0154] Exemplarily, the first terminal 101 determines relevant configuration information of a timer associated with a first carrier to determine the timer associated with the first carrier, and upon determining that the number of consecutive DTXs of the first carrier based on HARQ feedback meets a first condition, starts the timer associated with the first carrier. Exemplarily, the terminal device 101 determines that the number of consecutive DTXs of carrier A based on HARQ feedback meets the first condition, and starts the timer associated with carrier A; for another example, the terminal device 101 determines that the number of consecutive DTXs of carrier B based on HARQ feedback meets the first condition, and starts the timer associated with carrier B; the value of the first carrier-associated timer can be obtained according to the embodiment in step S2101, for example, if the timer is configured based on carrier granularity, the terminal device obtains the first carrier-associated timer through the first carrier-associated configuration, exemplarily obtaining the timer associated with carrier A through the first information associated with carrier A, and obtaining the timer associated with carrier B through the first information associated with carrier B; for another example, if the timer is configured based on terminal granularity, the terminal device obtains the first carrier-associated timer through the terminal-associated configuration, exemplarily obtaining the timer associated with carrier A through the first information associated with terminal, and obtaining the timer associated with carrier B through the first information associated with terminal.

[0155] In some embodiments, the terms "timer", "timer", etc. can be used interchangeably.

[0156] Step S2107: The first terminal 101 determines that the timer associated with the first carrier has expired, determines to resume using the resources on the first carrier to receive and / or send SL data, or determines that during the operation of the timer associated with the first carrier, determines to select the first resource to receive and / or send SL data during resource selection and / or reselection.

[0157] In some embodiments, the first resource is a resource not on the first carrier.

[0158] In some embodiments, the SL data includes at least one of the following: PSSCH; PSCCH; PSFCH; SSB (Synchronization Signal Block).

[0159] As an example, the first terminal 101 determines that the timer associated with the first carrier has expired, and determines to resume using resources on the first carrier to receive SL data.

[0160] As an example, the first terminal 101 determines that the timer associated with the first carrier has expired, and determines to resume using resources on the first carrier to send SL data.

[0161] As an example, the first terminal 101 determines that the timer associated with the first carrier has expired, and determines to resume using resources on the first carrier to receive and send SL data.

[0162] As an example, the first terminal 101 determines that the timer associated with the first carrier has expired, and determines to resume using resources on the first carrier to receive and / or send the PSSCH.

[0163] As an example, the first terminal 101 determines that the timer associated with the first carrier has expired, and determines to resume using resources on the first carrier to receive and / or send the PSCCH.

[0164] As an example, the first terminal 101 determines that the timer associated with the first carrier has expired, and determines to resume using resources on the first carrier to receive and / or send the PSFCH.

[0165] As an example, the first terminal 101 determines that the timer associated with the first carrier has expired, and determines to resume using resources on the first carrier to receive and / or send SSB.

[0166] As an example, the first terminal 101 determines that the timer associated with the first carrier is running, and determines to select the first resource to receive SL data during resource selection.

[0167] As an example, the first terminal 101 determines that the timer associated with the first carrier is running, and determines to select the first resource to send SL data during resource selection.

[0168] As an example, the first terminal 101 determines that the timer associated with the first carrier is running, and determines to select the first resource to receive and send SL data during resource selection.

[0169] As an example, the first terminal 101 determines that the timer associated with the first carrier is running, and determines to select the first resource to receive SL data during resource reselection.

[0170] As an example, the first terminal 101 determines that the timer associated with the first carrier is running, and determines to select the first resource to send SL data during resource reselection.

[0171] As an example, the first terminal 101 determines that the timer associated with the first carrier is running, and determines to select the first resource to receive and send SL data during resource reselection.

[0172] As an example, the first terminal 101 determines that the timer associated with the first carrier is running, and determines to select the first resource to receive SL data during resource selection and reselection.

[0173] As an example, the first terminal 101 determines that the timer associated with the first carrier is running, and determines to select the first resource to send SL data during resource selection and reselection.

[0174] As an example, the first terminal 101 determines that the timer associated with the first carrier is running, and determines to select the first resource to receive and send SL data during resource selection and reselection.

[0175] In some embodiments, the above-mentioned SL data includes at least one of the following: PSSCH; PSCCH; PSFCH; SSB.

[0176] As an example, the first terminal 101 determines that the timer associated with the first carrier is running, and determines to select the first resource to receive and / or send SL data PSSCH during resource selection and / or reselection.

[0177] As an example, the first terminal 101 determines that the timer associated with the first carrier is running, and determines to select the first resource to receive and / or send SL data PSCCH during resource selection and / or reselection.

[0178] As an example, the first terminal 101 determines that during the timer running, it is determined to select the first resource to receive and / or send SL data PSFCH during resource selection and / or reselection.

[0179] As an example, the first terminal 101 determines that during the timer running, it is determined to select the first resource to receive and / or send SL data SSB during resource selection and / or reselection.

[0180] The communication method involved in the embodiments of the present disclosure may include at least one of steps S2101 to S2107. For example, steps S2103, S2104, and S2105 can be implemented as independent embodiments, steps S2106 and S2107 can be implemented as independent embodiments, steps S2101, S2106, and S2107 can be implemented as independent embodiments, steps S2106 and S2107 can be implemented as independent embodiments, steps S2102, S2103, and S2104 can be implemented as independent embodiments, and steps S2102, S2103, S2104, and S2105 can be implemented as independent embodiments.

[0181] In some embodiments, steps S2101 and S2102 may be executed in an interchanged order or simultaneously.

[0182] In some embodiments, step S2102, step S2103, step S2104, step S2105, step S2106, and step S2107 are optional, and one or more of these steps may be omitted or replaced in different embodiments.

[0183] In some embodiments, step S2101, step S2103, step S2104, step S2105, step S2106, and step S2107 are optional, and one or more of these steps may be omitted or replaced in different embodiments.

[0184] In some embodiments, step S2101, step S2102, step S2104, step S2105, step S2106, and step S2107 are optional, and one or more of these steps may be omitted or replaced in different embodiments.

[0185] In some embodiments, step S2101, step S2102, step S2103, step S2105, step S2106, and step S2107 are optional, and one or more of these steps may be omitted or replaced in different embodiments.

[0186] In some embodiments, step S2101, step S2102, step S2103, step S2104, step S2106, and step S2107 are optional, and one or more of these steps may be omitted or replaced in different embodiments.

[0187] In some embodiments, step S2101, step S2102, step S2103, step S2104, step S2105, and step S2107 are optional, and one or more of these steps may be omitted or replaced in different embodiments.

[0188] In some embodiments, step S2101, step S2102, step S2103, step S2104, step S2105 and step S2106 are optional, and one or more of these steps may be omitted or replaced in different embodiments.

[0189] In some embodiments, reference may be made to other optional implementations described before or after the description corresponding to FIG. 2A .

[0190] Figure 2B is an interactive diagram illustrating a sidelink SL communication method according to an embodiment of the present disclosure. As shown in Figure 2B, the sidelink SL communication method according to the embodiment of the present disclosure can be applied to the communication system 100, and the method includes but is not limited to the following steps.

[0191] Step S2201: The network device 102 sends measurement configuration information.

[0192] In some embodiments, the network device 102 sends measurement configuration information to the first terminal 101 .

[0193] In some embodiments, the first terminal 101 receives the measurement configuration information. Optionally, the first terminal 101 receives the measurement configuration information sent by the network device 102.

[0194] In some embodiments, the measurement configuration information includes at least one of the following: RSSI (Received Signal Strength Indication) measurement configuration; RSRP (Reference Signal Receiving Power) measurement configuration; CO (Channel Occupation) measurement configuration; CBR (Channel Busy Ratio) measurement configuration.

[0195] Step S2202: The network device 102 sends a preset threshold.

[0196] In some embodiments, the network device 102 sends a preset threshold to the first terminal 101 .

[0197] As an example, the network device 102 sends the preset threshold via dedicated RRC (Radio Resource Control) signaling.

[0198] As another example, the network device 102 sends the preset threshold via SIB (Signaling In Band).

[0199] In some embodiments, the first terminal 101 receives the preset threshold. Alternatively, the first terminal 101 receives the preset threshold sent by the network device 102.

[0200] In some embodiments, the preset threshold is used by the first terminal 101 to determine whether to restore the first carrier according to the measurement result.

[0201] Step S2203: The first terminal 101 determines a preset threshold.

[0202] In some embodiments, the network device 102 sends the preset threshold.

[0203] In some embodiments, the first terminal 101 receives the above-mentioned preset threshold.

[0204] In some embodiments, the first terminal 101 receives the above-mentioned preset threshold sent by the network device 102.

[0205] As an example, the first terminal 101 receives RRC signaling sent by the network device 102, and the RRC signaling includes the above-mentioned preset threshold.

[0206] As an example, the first terminal 101 receives the SIB sent by the network device 102, and the SIB includes the above-mentioned preset threshold.

[0207] In some embodiments, the first terminal 101 obtains the preset threshold through pre-configuration. Exemplarily, when the first terminal 101 is in an OOC (Out Of Coverage) state, the first terminal 101 obtains the preset threshold through pre-configuration.

[0208] In some embodiments, the first terminal 101 may determine the first threshold based on implementation.

[0209] It should be noted that, in the embodiment of the present disclosure, when the state of the first terminal 101 is different, the method for obtaining the above-mentioned preset threshold is also different.

[0210] As an example, when the first terminal 101 is in the coverage area state, the first terminal 101 can obtain the above-mentioned preset threshold through dedicated RRC signaling.

[0211] As an example, when the first terminal 101 is in the coverage area state, the first terminal 101 can obtain the above preset threshold through SIB signaling.

[0212] As an example, when the first terminal 101 is out of coverage, the first terminal 101 may obtain the above-mentioned preset threshold through pre-configuration.

[0213] In some embodiments, the sidelink transmission resource allocation method of the first terminal 101 is to autonomously select the sidelink transmission resource or schedule the transmission resource by the network device 102. Optionally, the first terminal 101 is in any state: RRC connected state; RRC idle state; RRC inactive state; out of coverage state.

[0214] That is, the sidelink SL communication method provided in the embodiment of the present disclosure is applicable to a mode 1 terminal device in the RRC connected state. Alternatively, the sidelink SL communication method provided in the embodiment of the present disclosure is applicable to a mode 2 terminal device in any one of the RRC connected state, RRC idle state, RRC inactive state, and out-of-coverage state. Alternatively, the sidelink SL communication method provided in the embodiment of the present disclosure is applicable to a mode 2 terminal device in any one of the RRC idle state, RRC inactive state, and out-of-coverage state.

[0215] It should be noted that in an embodiment of the present disclosure, when the measurement configuration information is any one of RSSI measurement configuration, RSRP measurement configuration, CO measurement configuration and CBR measurement configuration, the first terminal 101 can determine the preset thresholds corresponding to the RSSI measurement configuration, RSRP measurement configuration, CO measurement configuration and CBR measurement configuration respectively through any of the aforementioned methods.

[0216] As an example, taking the measurement configuration information as RSSI measurement configuration as an example, the first terminal 101 receives a preset threshold corresponding to the RRSSI configured by the network device 102 .

[0217] As an example, taking the measurement configuration information as RSRP measurement configuration as an example, the first terminal 101 receives a preset threshold corresponding to the RRSSI configured by the network device 102.

[0218] As an example, taking the measurement configuration information as CO measurement configuration as an example, the first terminal 101 receives a preset threshold corresponding to the CO configured by the network device 102 .

[0219] As an example, taking the measurement configuration information as CBR measurement configuration as an example, the first terminal 101 receives a preset threshold corresponding to RCBR configured by the network device 102 .

[0220] As an example, taking the measurement configuration information as RSSI measurement configuration as an example, the first terminal 101 determines a preset threshold corresponding to RSSI based on implementation.

[0221] As an example, taking the measurement configuration information as RSRP measurement configuration as an example, the first terminal 101 determines the preset threshold corresponding to the RSSI based on implementation.

[0222] As an example, taking the measurement configuration information as CO measurement configuration as an example, the first terminal 101 determines a preset threshold corresponding to CO based on implementation.

[0223] As an example, taking the measurement configuration information as CBR measurement configuration as an example, the first terminal 101 is based on achieving a preset threshold corresponding to the CBR.

[0224] As an example, taking the measurement configuration information as RSSI measurement configuration as an example, the first terminal 101 determines the preset threshold corresponding to RSSI through pre-configuration.

[0225] As an example, taking the measurement configuration information as RSRP measurement configuration as an example, the first terminal 101 determines the preset threshold corresponding to RSSI through pre-configuration.

[0226] As an example, taking the measurement configuration information as CO measurement configuration as an example, the first terminal 101 determines the preset threshold corresponding to CO through pre-configuration.

[0227] As an example, taking the measurement configuration information as CBR measurement configuration as an example, the first terminal 101 determines the preset threshold corresponding to the CBR through pre-configuration.

[0228] It should be noted that, in an embodiment of the present disclosure, when the measurement configuration information includes at least two of RSSI measurement configuration, RSRP measurement configuration, CO measurement configuration and CBR measurement configuration, the first terminal 101 can determine the preset threshold corresponding to each measurement configuration respectively.

[0229] As an example, taking the case where the measurement configuration information includes RSSI measurement configuration and RSRP measurement configuration, the first terminal 101 determines a preset threshold corresponding to RSSI and a preset threshold corresponding to RSRP.

[0230] As an example, taking the case where the measurement configuration information includes RSSI measurement configuration and CO measurement configuration, the first terminal 101 determines a preset threshold corresponding to RSSI and a preset threshold corresponding to CO.

[0231] As an example, taking the case where the measurement configuration information includes RSSI measurement configuration and CBR measurement configuration, the first terminal 101 determines a preset threshold corresponding to RSSI and a preset threshold corresponding to CBR.

[0232] As an example, taking the case where the measurement configuration information includes RSRP measurement configuration and CO measurement configuration, the first terminal 101 determines a preset threshold corresponding to RSRP and a preset threshold corresponding to CO.

[0233] As an example, taking the case where the measurement configuration information includes RSRP measurement configuration and CBR measurement configuration, the first terminal 101 determines a preset threshold corresponding to RSRP and a preset threshold corresponding to CBR.

[0234] As an example, taking the case where the measurement configuration information includes CO measurement configuration and CBR measurement configuration, the first terminal 101 determines a preset threshold corresponding to CO and a preset threshold corresponding to CBR.

[0235] As an example, taking the measurement configuration information including RSSI measurement configuration, RSRP measurement configuration and CO measurement configuration as an example, the first terminal 101 determines the preset threshold corresponding to RSSI, the preset threshold corresponding to RSRP and the preset threshold corresponding to CO.

[0236] As an example, taking the measurement configuration information including RSSI measurement configuration, RSRP measurement configuration and CBR measurement configuration as an example, the first terminal 101 determines the preset threshold corresponding to RSSI, the preset threshold corresponding to RSRP and the preset threshold corresponding to CBR.

[0237] As an example, taking the measurement configuration information including RSSI measurement configuration, CO measurement configuration and CBR measurement configuration as an example, the first terminal 101 determines the preset threshold corresponding to RSSI, the preset threshold corresponding to CO and the preset threshold corresponding to CBR.

[0238] As an example, taking the measurement configuration information including RSRP measurement configuration, CO measurement configuration and CBR measurement configuration as an example, the first terminal 101 determines the preset threshold corresponding to RSRP, the preset threshold corresponding to CO and the preset threshold corresponding to CBR.

[0239] As an example, taking the measurement configuration information including RSSI measurement configuration, RSRP measurement configuration, CO measurement configuration and CBR measurement configuration as an example, the first terminal 101 determines a preset threshold corresponding to RSSI, a preset threshold corresponding to RSRP, a preset threshold corresponding to CO and a preset threshold corresponding to CBR.

[0240] Step S2204: The first terminal 101 performs measurement according to the measurement configuration information and determines a measurement result associated with the first carrier.

[0241] In some embodiments, the first carrier is one or more carriers supported by the first unicast connection between the first terminal 101 and the second terminal.

[0242] As an example, the first terminal 101 performs measurement according to the RSSI measurement configuration to determine the RSSI measurement result associated with the first carrier.

[0243] As an example, the first terminal 101 performs measurement according to the RSRP measurement configuration to determine the RSRP measurement result associated with the first carrier.

[0244] As an example, the first terminal 101 performs measurement according to the CO measurement configuration to determine the CO measurement result associated with the first carrier.

[0245] As an example, the first terminal 101 performs measurement according to the CBR measurement configuration to determine a CBR measurement result associated with the first carrier.

[0246] Optionally, the first terminal 101 performs a CBR measurement on the first resource pool of the first carrier according to the CBR measurement configuration, determines the CBR measurement result of the first resource pool on the first carrier; and determines the CBR measurement result of the first resource pool as the CBR measurement result associated with the first carrier. Exemplarily, the first resource pool is the first resource pool selected by the first terminal on the first carrier. Exemplarily, the first resource pool is a resource pool determined by the first terminal from one or more resource pools selected on the first carrier.

[0247] Exemplarily, the first terminal 101 selects the CBR of the first resource pool on the first carrier to measure and obtain a CBR measurement result, and determines the CBR measurement result as the CBR measurement result associated with the first carrier.

[0248] Exemplarily, the first terminal 101 implements a resource pool determined from one or more resource pools selected on the first carrier as the first resource pool, and performs CBR measurement on the first resource pool according to the CBR measurement configuration, determines the CBR measurement result of the first resource pool on the first carrier, and determines the CBR measurement result of the first resource pool as the CBR measurement result associated with the first carrier.

[0249] In some embodiments, the measurement configuration information includes RSSI measurement configuration, and / or RSRP measurement configuration, and / or CO measurement configuration; the above-mentioned measurement based on the measurement configuration information to determine the measurement result associated with the first carrier includes: measurement on the first carrier according to the measurement configuration information to determine the measurement result associated with the first carrier.

[0250] As an example, taking the measurement configuration information including RSSI measurement configuration as an example, measurement can be performed on a first carrier according to the RSSI measurement configuration to determine an RSSI measurement result on the first carrier, and the RSSI measurement result on the first carrier can be determined as the RSSI measurement result associated with the first carrier.

[0251] As an example, taking the measurement configuration information including RSRP measurement configuration as an example, the RSRP measurement result on the first carrier may be determined according to the RSRP measurement configuration, and the RSRP measurement result on the first carrier may be determined as the RSRP measurement result associated with the first carrier.

[0252] As an example, taking the measurement configuration information including CO measurement configuration as an example, measurement can be performed on a first carrier according to the CO measurement configuration to determine a CO measurement result on the first carrier, and the CO measurement result on the first carrier is determined as the CO measurement result associated with the first carrier.

[0253] As an example, taking the example where the measurement configuration information includes an RSSI measurement configuration and an RSRP measurement configuration, measurements can be performed on a first carrier according to the RSSI measurement configuration and the RSRP measurement configuration, an RSSI measurement result and an RSRP measurement result on the first carrier can be determined, and the RSSI measurement result and the RSRP measurement result on the first carrier can be determined as the RSSI measurement result and the RSRP measurement result associated with the first carrier.

[0254] As an example, taking the case where the measurement configuration information includes an RSSI measurement configuration and a CO measurement configuration, measurements can be performed on a first carrier based on the RSSI measurement configuration and the CO measurement configuration, an RSSI measurement result and a CO measurement result on the first carrier can be determined, and the RSSI measurement result and the CO measurement result on the first carrier can be determined as the RSSI measurement result and the CO measurement result associated with the first carrier.

[0255] As an example, taking the case where the measurement configuration information includes an RSRP measurement configuration and a CO measurement configuration, measurement can be performed on a first carrier according to the RSRP measurement configuration and the CO measurement configuration, an RSRP measurement result and a CO measurement result on the first carrier can be determined, and the RSRP measurement result and the CO measurement result on the first carrier can be determined as the RSRP measurement result and the CO measurement result associated with the first carrier.

[0256] As an example, taking the case where the measurement configuration information includes RSSI measurement configuration, RSRP measurement configuration, and CO measurement configuration, measurements can be performed on a first carrier based on the RSSI measurement configuration, RSRP measurement configuration, and CO measurement configuration to determine the RSSI measurement result, RSRP measurement result, and CO measurement result on the first carrier, and the RSSI measurement result, RSRP measurement result, and CO measurement result on the first carrier are determined as the RSSI measurement result, RSRP measurement result, and CO measurement result associated with the first carrier.

[0257] Step S2205: The first terminal 101 determines that the measurement result associated with the first carrier is less than or equal to the preset threshold, and determines to resume using the first carrier. Exemplarily, it determines to resume using the resources on the first carrier to receive and / or send SL data. Alternatively, it determines that the measurement result associated with the first carrier is greater than or equal to the preset threshold, and determines not to resume using the first carrier. Exemplarily, it does not resume using the resources on the first carrier to receive and / or send SL data. Exemplarily, when selecting and / or reselecting resources, resources other than the first carrier are selected to receive and / or send SL data.

[0258] Exemplarily, the measurement configuration information is taken as an example of RSSI measurement configuration. The first terminal 101 determines that the RSSI measurement result associated with the first carrier is less than or equal to the preset threshold, and determines to resume using the first carrier. Exemplarily, the first terminal 101 determines to resume using the resources on the first carrier to receive and / or send SL data. Alternatively, the first terminal 101 determines that the RSSI measurement result associated with the first carrier is greater than or equal to the preset threshold, and determines not to resume using the first carrier. Exemplarily, the first terminal 101 does not resume using the resources on the first carrier to receive and / or send SL data. Exemplarily, the first terminal 101 selects resources on a non-first carrier to receive and / or send SL data during resource selection and / or reselection.

[0259] As an example, taking the measurement configuration information as RSSI measurement configuration, the first terminal 101 determines that the RSSI measurement result associated with the first carrier is less than or equal to a preset threshold, and determines to resume using resources on the first carrier to receive SL data.

[0260] As an example, taking the measurement configuration information as RSSI measurement configuration, the first terminal 101 determines that the RSSI measurement result associated with the first carrier is less than or equal to a preset threshold, and determines to resume using resources on the first carrier to send SL data.

[0261] As an example, taking the measurement configuration information as RSSI measurement configuration, the first terminal 101 determines that the RSSI measurement result associated with the first carrier is less than or equal to a preset threshold, and determines to resume using resources on the first carrier to receive and send SL data.

[0262] As an example, taking the measurement configuration information as RSSI measurement configuration, the first terminal 101 determines that the RSSI measurement result associated with the first carrier is greater than or equal to a preset threshold, and determines to select the first resource for receiving SL data during resource selection.

[0263] As an example, taking the measurement configuration information as RSSI measurement configuration, the first terminal 101 determines that the RSSI measurement result associated with the first carrier is greater than or equal to a preset threshold, and determines to select the first resource to receive SL data during resource reselection.

[0264] As an example, taking the measurement configuration information as RSSI measurement configuration, the first terminal 101 determines that the RSSI measurement result associated with the first carrier is greater than or equal to a preset threshold, and determines to select the first resource for receiving SL data during resource selection and reselection.

[0265] As an example, taking the measurement configuration information as RSSI measurement configuration, the first terminal 101 determines that the RSSI measurement result associated with the first carrier is greater than or equal to a preset threshold, and determines to select the first resource for sending SL data during resource selection.

[0266] As an example, taking the measurement configuration information as RSSI measurement configuration, the first terminal 101 determines that the RSSI measurement result associated with the first carrier is greater than or equal to a preset threshold, and determines to select the first resource for sending SL data during resource reselection.

[0267] As an example, taking the measurement configuration information as RSSI measurement configuration, the first terminal 101 determines that the RSSI measurement result associated with the first carrier is greater than or equal to a preset threshold, and determines to select the first resource for sending SL data during resource selection and reselection.

[0268] As an example, taking the measurement configuration information as RSSI measurement configuration, the first terminal 101 determines that the RSSI measurement result associated with the first carrier is greater than or equal to a preset threshold, and determines to select the first resource for receiving and sending SL data during resource selection.

[0269] As an example, taking the measurement configuration information as RSSI measurement configuration, the first terminal 101 determines that the RSSI measurement result associated with the first carrier is greater than or equal to a preset threshold, and determines to select the first resource for receiving and sending SL data during resource reselection.

[0270] As an example, taking the measurement configuration information as RSSI measurement configuration, the first terminal 101 determines that the RSSI measurement result associated with the first carrier is greater than or equal to a preset threshold, and determines to select the first resource for receiving and sending SL data during resource selection and reselection.

[0271] Exemplarily, the measurement configuration information is taken as an example of RSRP measurement configuration. The first terminal 101 determines that the RSRP measurement result associated with the first carrier is less than or equal to the preset threshold, and determines to resume using the first carrier. Exemplarily, the first terminal 101 determines to resume using the resources on the first carrier to receive and / or send SL data. Alternatively, the first terminal 101 determines that the RSRP measurement result associated with the first carrier is greater than or equal to the preset threshold, and determines not to resume using the first carrier. Exemplarily, the first terminal 101 does not resume using the resources on the first carrier to receive and / or send SL data. Exemplarily, the first terminal 101 selects resources on a non-first carrier to receive and / or send SL data during resource selection and / or reselection.

[0272] As an example, taking the measurement configuration information as RSRP measurement configuration, the first terminal 101 determines that the RSRP measurement result associated with the first carrier is less than or equal to a preset threshold, and determines to resume using resources on the first carrier to receive SL data.

[0273] As an example, taking the measurement configuration information as RSRP measurement configuration, the first terminal 101 determines that the RSRP measurement result associated with the first carrier is less than or equal to a preset threshold, and determines to resume using resources on the first carrier to send SL data.

[0274] As an example, taking the measurement configuration information as RSRP measurement configuration, the first terminal 101 determines that the RSRP measurement result associated with the first carrier is less than or equal to a preset threshold, and determines to resume using resources on the first carrier to receive and send SL data.

[0275] As an example, taking the measurement configuration information as RSRP measurement configuration, the first terminal 101 determines that the RSRP measurement result associated with the first carrier is greater than or equal to a preset threshold, and determines to select the first resource for receiving SL data during resource selection.

[0276] As an example, taking the measurement configuration information as RSRP measurement configuration, the first terminal 101 determines that the RSRP measurement result associated with the first carrier is greater than or equal to a preset threshold, and determines to select the first resource to receive SL data during resource reselection.

[0277] As an example, taking the measurement configuration information as RSRP measurement configuration, the first terminal 101 determines that the RSRP measurement result associated with the first carrier is greater than or equal to a preset threshold, and determines to select the first resource for receiving SL data during resource selection and reselection.

[0278] As an example, taking the measurement configuration information as RSRP measurement configuration, the first terminal 101 determines that the RSRP measurement result associated with the first carrier is greater than or equal to a preset threshold, and determines to select the first resource for sending SL data during resource selection.

[0279] As an example, taking the measurement configuration information as RSRP measurement configuration, the first terminal 101 determines that the RSRP measurement result associated with the first carrier is greater than or equal to a preset threshold, and determines to select the first resource for sending SL data during resource reselection.

[0280] As an example, taking the measurement configuration information as RSRP measurement configuration, the first terminal 101 determines that the RSRP measurement result associated with the first carrier is greater than or equal to a preset threshold, and determines to select the first resource for sending SL data during resource selection and reselection.

[0281] As an example, taking the measurement configuration information as RSRP measurement configuration, the first terminal 101 determines that the RSRP measurement result associated with the first carrier is greater than or equal to a preset threshold, and determines to select the first resource for receiving and sending SL data during resource selection.

[0282] As an example, taking the measurement configuration information as RSRP measurement configuration, the first terminal 101 determines that the RSRP measurement result associated with the first carrier is greater than or equal to a preset threshold, and determines to select the first resource for receiving and sending SL data during resource reselection.

[0283] As an example, taking the measurement configuration information as RSRP measurement configuration, the first terminal 101 determines that the RSRP measurement result associated with the first carrier is greater than or equal to a preset threshold, and determines to select the first resource for receiving and sending SL data during resource selection and reselection.

[0284] Exemplarily, the measurement configuration information is taken as CO measurement configuration. The first terminal 101 determines that the CO measurement result associated with the first carrier is less than or equal to the preset threshold, and determines to resume using the first carrier. Exemplarily, the first terminal 101 determines to resume using the resources on the first carrier to receive and / or send SL data. Alternatively, the first terminal 101 determines that the CO measurement result associated with the first carrier is greater than or equal to the preset threshold, and determines not to resume using the first carrier. Exemplarily, the first terminal 101 does not resume using the resources on the first carrier to receive and / or send SL data. Exemplarily, the first terminal 101 selects resources on a non-first carrier to receive and / or send SL data during resource selection and / or reselection.

[0285] As an example, taking the measurement configuration information as CO measurement configuration, the first terminal 101 determines that the CO measurement result associated with the first carrier is less than or equal to a preset threshold, and determines to resume using resources on the first carrier to receive SL data.

[0286] As an example, taking the measurement configuration information as CO measurement configuration, the first terminal 101 determines that the CO measurement result associated with the first carrier is less than or equal to a preset threshold, and determines to resume using resources on the first carrier to send SL data.

[0287] As an example, taking the measurement configuration information as CO measurement configuration, the first terminal 101 determines that the CO measurement result associated with the first carrier is less than or equal to a preset threshold, and determines to resume using resources on the first carrier to receive and send SL data.

[0288] As an example, taking the measurement configuration information as CO measurement configuration, the first terminal 101 determines that the CO measurement result associated with the first carrier is greater than or equal to a preset threshold, and determines to select the first resource to receive SL data during resource selection.

[0289] As an example, taking the measurement configuration information as CO measurement configuration, the first terminal 101 determines that the CO measurement result associated with the first carrier is greater than or equal to a preset threshold, and determines to select the first resource to receive SL data during resource reselection.

[0290] As an example, taking the measurement configuration information as CO measurement configuration, the first terminal 101 determines that the CO measurement result associated with the first carrier is greater than or equal to a preset threshold, and determines to select the first resource to receive SL data during resource selection and reselection.

[0291] As an example, taking the measurement configuration information as CO measurement configuration, the first terminal 101 determines that the CO measurement result associated with the first carrier is greater than or equal to a preset threshold, and determines to select the first resource for sending SL data during resource selection.

[0292] As an example, taking the measurement configuration information as CO measurement configuration, the first terminal 101 determines that the CO measurement result associated with the first carrier is greater than or equal to a preset threshold, and determines to select the first resource to send SL data during resource reselection.

[0293] As an example, taking the measurement configuration information as CO measurement configuration, the first terminal 101 determines that the CO measurement result associated with the first carrier is greater than or equal to a preset threshold, and determines to select the first resource for sending SL data during resource selection and reselection.

[0294] As an example, taking the measurement configuration information as CO measurement configuration, the first terminal 101 determines that the CO measurement result associated with the first carrier is greater than or equal to a preset threshold, and determines to select the first resource for receiving and sending SL data during resource selection.

[0295] As an example, taking the measurement configuration information as CO measurement configuration, the first terminal 101 determines that the CO measurement result associated with the first carrier is greater than or equal to a preset threshold, and determines to select the first resource for receiving and sending SL data during resource reselection.

[0296] As an example, taking the measurement configuration information as CO measurement configuration, the first terminal 101 determines that the CO measurement result associated with the first carrier is greater than or equal to a preset threshold, and determines to select the first resource for receiving and sending SL data during resource selection and reselection.

[0297] Exemplarily, the measurement configuration information is taken as an example of CBR measurement configuration. The first terminal 101 determines that the CBR measurement result associated with the first carrier is less than or equal to the preset threshold, and determines to resume using the first carrier. Exemplarily, the first terminal 101 determines to resume using the resources on the first carrier to receive and / or send SL data. Alternatively, the first terminal 101 determines that the CBR measurement result associated with the first carrier is greater than or equal to the preset threshold, and determines not to resume using the first carrier. Exemplarily, the first terminal 101 does not resume using the resources on the first carrier to receive and / or send SL data. Exemplarily, the first terminal 101 selects resources on a non-first carrier to receive and / or send SL data during resource selection and / or reselection.

[0298] As an example, taking the measurement configuration information as CBR measurement configuration, the first terminal 101 determines that the CBR measurement result associated with the first carrier is less than or equal to a preset threshold, and determines to resume using resources on the first carrier to receive SL data.

[0299] As an example, taking the measurement configuration information as CBR measurement configuration, the first terminal 101 determines that the CBR measurement result associated with the first carrier is less than or equal to a preset threshold, and determines to resume using resources on the first carrier to send SL data.

[0300] As an example, taking the measurement configuration information as CBR measurement configuration, the first terminal 101 determines that the CBR measurement result associated with the first carrier is less than or equal to a preset threshold, and determines to resume using resources on the first carrier to receive and send SL data.

[0301] As an example, taking the measurement configuration information as CBR measurement configuration, the first terminal 101 determines that the CBR measurement result associated with the first carrier is greater than or equal to a preset threshold, and determines to select the first resource for receiving SL data during resource selection.

[0302] As an example, taking the measurement configuration information as CBR measurement configuration, the first terminal 101 determines that the CBR measurement result associated with the first carrier is greater than or equal to a preset threshold, and determines to select the first resource to receive SL data during resource reselection.

[0303] As an example, taking the measurement configuration information as CBR measurement configuration, the first terminal 101 determines that the CBR measurement result associated with the first carrier is greater than or equal to a preset threshold, and determines to select the first resource for receiving SL data during resource selection and reselection.

[0304] As an example, taking the measurement configuration information as CBR measurement configuration, the first terminal 101 determines that the CBR measurement result associated with the first carrier is greater than or equal to a preset threshold, and determines to select the first resource for sending SL data during resource selection.

[0305] As an example, taking the measurement configuration information as CBR measurement configuration, the first terminal 101 determines that the CBR measurement result associated with the first carrier is greater than or equal to a preset threshold, and determines to select the first resource to send SL data during resource reselection.

[0306] As an example, taking the measurement configuration information as CBR measurement configuration, the first terminal 101 determines that the CBR measurement result associated with the first carrier is greater than or equal to a preset threshold, and determines to select the first resource for sending SL data during resource selection and reselection.

[0307] As an example, taking the measurement configuration information as CBR measurement configuration, the first terminal 101 determines that the CBR measurement result associated with the first carrier is greater than or equal to a preset threshold, and determines to select the first resource for receiving and sending SL data during resource selection.

[0308] As an example, taking the measurement configuration information as CBR measurement configuration, the first terminal 101 determines that the CBR measurement result associated with the first carrier is greater than or equal to a preset threshold, and determines to select the first resource for receiving and sending SL data during resource reselection.

[0309] As an example, taking the measurement configuration information as CBR measurement configuration, the first terminal 101 determines that the CBR measurement result associated with the first carrier is greater than or equal to a preset threshold, and determines to select the first resource for receiving and sending SL data during resource selection and reselection.

[0310] In some embodiments, the first resource is a resource on a non-first carrier.

[0311] In some embodiments of the present disclosure, when the measurement configuration information includes any two of the RSSI measurement configuration, RSRP measurement configuration, CO measurement configuration and CBR measurement configuration, if at least one measurement result associated with the first carrier is greater than or equal to the corresponding preset threshold, it can be determined that the measurement result associated with the first carrier is greater than or equal to the preset threshold.

[0312] As an example, taking the measurement configuration information including RSSI measurement configuration and RSRP measurement configuration as an example, the first terminal 101 determines that the RSSI measurement result associated with the first carrier is greater than or equal to the preset threshold corresponding to RSSI, and / or the RSRP measurement result associated with the first carrier is greater than or equal to the preset threshold corresponding to RSRP, and determines that the measurement result associated with the first carrier is greater than or equal to the preset threshold.

[0313] As an example, taking the measurement configuration information including RSSI measurement configuration and CO measurement configuration as an example, the first terminal 101 determines that the RSSI measurement result associated with the first carrier is greater than or equal to the preset threshold corresponding to RSSI, and / or the CO measurement result associated with the first carrier is greater than or equal to the preset threshold corresponding to CO, and determines that the measurement result associated with the first carrier is greater than or equal to the preset threshold.

[0314] As an example, taking the measurement configuration information including RSSI measurement configuration and CBR measurement configuration as an example, the first terminal 101 determines that the RSSI measurement result associated with the first carrier is greater than or equal to the preset threshold corresponding to RSSI, and / or the CBR measurement result associated with the first carrier is greater than or equal to the preset threshold corresponding to CBR, and determines that the measurement result associated with the first carrier is greater than or equal to the preset threshold.

[0315] As an example, taking the measurement configuration information including RSRP measurement configuration and CO measurement configuration as an example, the first terminal 101 determines that the RSRP measurement result associated with the first carrier is greater than or equal to the preset threshold corresponding to RSRP, and / or the CO measurement result associated with the first carrier is greater than or equal to the preset threshold corresponding to CO, and determines that the measurement result associated with the first carrier is greater than or equal to the preset threshold.

[0316] As an example, taking the measurement configuration information including RSRP measurement configuration and CBR measurement configuration as an example, the first terminal 101 determines that the RSRP measurement result associated with the first carrier is greater than or equal to the preset threshold corresponding to RSRP, and / or the CBR measurement result associated with the first carrier is greater than or equal to the preset threshold corresponding to CBR, and determines that the measurement result associated with the first carrier is greater than or equal to the preset threshold.

[0317] As an example, taking the measurement configuration information including CO measurement configuration and CBR measurement configuration as an example, the first terminal 101 determines that the CO measurement result associated with the first carrier is greater than or equal to the preset threshold corresponding to CO, and / or the CBR measurement result associated with the first carrier is greater than or equal to the preset threshold corresponding to CBR, and determines that the measurement result associated with the first carrier is greater than or equal to the preset threshold.

[0318] In some embodiments of the present disclosure, when the measurement configuration information includes any three of RSSI measurement configuration, RSRP measurement configuration, CO measurement configuration and CBR measurement configuration, if at least one measurement result associated with the first carrier is greater than or equal to the corresponding preset threshold, it can be determined that the measurement result associated with the first carrier is greater than or equal to the preset threshold.

[0319] As an example, taking the measurement configuration information including RSSI measurement configuration, RSRP measurement configuration and CO measurement configuration as an example, the first terminal 101 determines that the RSSI measurement result associated with the first carrier is greater than or equal to the preset threshold corresponding to RSSI, and / or the RSRP measurement result associated with the first carrier is greater than or equal to the preset threshold corresponding to RSRP, and / or the CO measurement result associated with the first carrier is greater than or equal to the preset threshold corresponding to CO, and determines that the measurement result is greater than or equal to the preset threshold.

[0320] As an example, taking the measurement configuration information including RSSI measurement configuration, RSRP measurement configuration and CBR measurement configuration as an example, the first terminal 101 determines that the RSSI measurement result associated with the first carrier is greater than or equal to the preset threshold corresponding to RSSI, and / or the RSRP measurement result associated with the first carrier is greater than or equal to the preset threshold corresponding to RSRP, and / or the CBR measurement result associated with the first carrier is greater than or equal to the preset threshold corresponding to CBR, and determines that the measurement result associated with the first carrier is greater than or equal to the preset threshold.

[0321] As an example, taking the measurement configuration information including RSRP measurement configuration, CO measurement configuration and CBR measurement configuration as an example, the first terminal 101 determines that the RSRP measurement result associated with the first carrier is greater than or equal to the preset threshold corresponding to RSRP, and / or the CO measurement result associated with the first carrier is greater than or equal to the preset threshold corresponding to CO, and / or the CBR measurement result associated with the first carrier is greater than or equal to the preset threshold corresponding to CBR, and determines that the measurement result associated with the first carrier is greater than or equal to the preset threshold.

[0322] In some embodiments of the present disclosure, when the measurement configuration information includes RSSI measurement configuration, RSRP measurement configuration, CO measurement configuration and CBR measurement configuration, if at least one measurement result associated with the first carrier is greater than or equal to the corresponding preset threshold, it can be determined that the measurement result associated with the first carrier is greater than or equal to the preset threshold.

[0323] As an example, taking the measurement configuration information including RSSI measurement configuration, RSRP measurement configuration, CO measurement configuration and CBR measurement configuration as an example, the first terminal 101 determines that the RSSI measurement result associated with the first carrier is greater than or equal to the preset threshold corresponding to the RSSI, and determines that the first carrier associated is greater than or equal to the preset threshold.

[0324] As an example, taking the measurement configuration information including RSSI measurement configuration, RSRP measurement configuration, CO measurement configuration and CBR measurement configuration as an example, the first terminal 101 determines that the RSRP measurement result associated with the first carrier is greater than or equal to the preset threshold corresponding to RSRP, and determines that the RSRP measurement result associated with the first carrier is greater than or equal to the preset threshold.

[0325] As an example, taking the measurement configuration information including RSSI measurement configuration, RSRP measurement configuration, CO measurement configuration and CBR measurement configuration as an example, the first terminal 101 determines that the CO measurement result associated with the first carrier is greater than or equal to the preset threshold corresponding to the CO, and determines that the measurement result associated with the first carrier is greater than or equal to the preset threshold.

[0326] As an example, taking the measurement configuration information including RSSI measurement configuration, RSRP measurement configuration, CO measurement configuration and CBR measurement configuration as an example, the first terminal 101 determines that the CBR measurement result associated with the first carrier is greater than or equal to the preset threshold corresponding to the CBR, and determines that the first carrier is associated with a value greater than or equal to the preset threshold.

[0327] As an example, taking the measurement configuration information including RSSI measurement configuration, RSRP measurement configuration, CO measurement configuration and CBR measurement configuration as an example, the first terminal 101 determines that the RSSI measurement result associated with the first carrier is greater than or equal to the preset threshold corresponding to RSSI, and the RSRP measurement result associated with the first carrier is greater than or equal to the preset threshold corresponding to RSRP, and determines that the first carrier is associated with greater than or equal to the preset threshold.

[0328] As an example, taking the measurement configuration information including RSSI measurement configuration, RSRP measurement configuration, CO measurement configuration and CBR measurement configuration as an example, the first terminal 101 determines that the RSSI measurement result associated with the first carrier is greater than or equal to the preset threshold corresponding to RSSI, and the CO measurement result associated with the first carrier is greater than or equal to the preset threshold corresponding to CO, then it can be determined that the first carrier is greater than or equal to the preset threshold.

[0329] As an example, taking the measurement configuration information including RSSI measurement configuration, RSRP measurement configuration, CO measurement configuration and CBR measurement configuration as an example, the first terminal 101 determines that the RSSI measurement result associated with the first carrier is greater than or equal to the preset threshold corresponding to RSSI, and the CBR measurement result associated with the first carrier is greater than or equal to the preset threshold corresponding to CBR, then it can be determined that the first carrier is greater than or equal to the preset threshold.

[0330] As an example, taking the measurement configuration information including RSSI measurement configuration, RSRP measurement configuration, CO measurement configuration and CBR measurement configuration as an example, the first terminal 101 determines that the RSRP measurement result associated with the first carrier is greater than or equal to the preset threshold corresponding to RSRP, and the CO measurement result associated with the first carrier is greater than or equal to the preset threshold corresponding to CO, then it can be determined that the first carrier is greater than or equal to the preset threshold.

[0331] As an example, taking the measurement configuration information including RSSI measurement configuration, RSRP measurement configuration, CO measurement configuration and CBR measurement configuration as an example, the first terminal 101 determines that the RSRP measurement result associated with the first carrier is greater than or equal to the preset threshold corresponding to RSRP, and the CBR measurement result associated with the first carrier is greater than or equal to the preset threshold corresponding to CBR, then it can be determined that the first carrier is greater than or equal to the preset threshold.

[0332] As an example, taking the measurement configuration information including RSSI measurement configuration, RSRP measurement configuration, CO measurement configuration and CBR measurement configuration as an example, the first terminal 101 determines that the CO measurement result associated with the first carrier is greater than or equal to the preset threshold corresponding to CO, and the CBR measurement result associated with the first carrier is greater than or equal to the preset threshold corresponding to CBR, then it can be determined that the first carrier is greater than or equal to the preset threshold.

[0333] In some embodiments of the present disclosure, when the measurement configuration information includes RSSI measurement configuration, RSRP measurement configuration, CO measurement configuration and CBR measurement configuration, if the measurement results corresponding to the three measurement configurations are greater than or equal to the corresponding preset thresholds, the preset threshold associated with the first carrier can be determined.

[0334] As an example, taking the measurement configuration information including RSSI measurement configuration, RSRP measurement configuration, CO measurement configuration and CBR measurement configuration as an example, the first terminal 101 determines that the RSSI measurement result associated with the first carrier is greater than or equal to the preset threshold corresponding to RSSI, and the RSRP measurement result associated with the first carrier is greater than or equal to the preset threshold corresponding to RSRP, and the CO measurement result associated with the first carrier is greater than or equal to the preset threshold corresponding to CO, then it can be determined that the first carrier is greater than or equal to the preset threshold.

[0335] As an example, taking the measurement configuration information including RSSI measurement configuration, RSRP measurement configuration, CO measurement configuration and CBR measurement configuration as an example, the first terminal 101 determines that the RSSI measurement result associated with the first carrier is greater than or equal to the preset threshold corresponding to RSSI, and the RSRP measurement result associated with the first carrier is greater than or equal to the preset threshold corresponding to RSRP, and the CBR measurement result associated with the first carrier is greater than or equal to the preset threshold corresponding to CBR, then it can be determined that the first carrier is greater than or equal to the preset threshold.

[0336] As an example, taking the measurement configuration information including RSSI measurement configuration, RSRP measurement configuration, CO measurement configuration and CBR measurement configuration as an example, the first terminal 101 determines that the RSSI measurement result associated with the first carrier is greater than or equal to the preset threshold corresponding to RSSI, and the CO measurement result associated with the first carrier is greater than or equal to the preset threshold corresponding to CO, and the CBR measurement result associated with the first carrier is greater than or equal to the preset threshold corresponding to CBR, then it can be determined that the first carrier is greater than or equal to the preset threshold.

[0337] As an example, taking the measurement configuration information including RSSI measurement configuration, RSRP measurement configuration, CO measurement configuration and CBR measurement configuration as an example, the first terminal 101 determines that the RSRP measurement result associated with the first carrier is greater than or equal to the preset threshold corresponding to RSRP, and the CO measurement result associated with the first carrier is greater than or equal to the preset threshold corresponding to CO, and the CBR measurement result associated with the first carrier is greater than or equal to the preset threshold corresponding to CBR, then it can be determined that the first carrier is greater than or equal to the preset threshold.

[0338] In some embodiments of the present disclosure, when the measurement configuration information includes RSSI measurement configuration, RSRP measurement configuration, CO measurement configuration and CBR measurement configuration, if the measurement results corresponding to the four measurement configurations are all greater than or equal to the corresponding preset thresholds, it can be determined that the measurement results are greater than or equal to the preset thresholds.

[0339] The communication method involved in the embodiments of the present disclosure may include at least one of steps S2201 to S2204. For example, step S2201 can be implemented as an independent embodiment, step S2202 can be implemented as an independent embodiment, step S2201 + step S2202 can be implemented as an independent embodiment, step S2201 + step S2204 + step S2205 can be implemented as an independent embodiment, step S2202 + step S2203 can be implemented as an independent embodiment, and step S2204 + step S2205 can be implemented as an independent embodiment, but the present invention is not limited thereto.

[0340] In some embodiments, step S2201 and step S2202 may be performed in an exchanged order or simultaneously, and step S2203 and step S2204 may be performed in an exchanged order or simultaneously.

[0341] In some embodiments, step S2201 is optional, and one or more of these steps may be omitted or replaced in different embodiments.

[0342] In some embodiments, step S2202 is optional, and one or more of these steps may be omitted or replaced in different embodiments.

[0343] In some embodiments, step S2203 is optional, and one or more of these steps may be omitted or replaced in different embodiments.

[0344] In some embodiments, reference may be made to other optional implementations described before or after the description corresponding to FIG. 2B .

[0345] In some embodiments, the names of information, etc. are not limited to the names described in the embodiments, and terms such as "information", "message", "signal", "signaling", "report", "configuration", "indication", "instruction", "command", "channel", "parameter", "domain", "field", "symbol", "symbol", "codeword", "codebook", "codeword", "codepoint", "bit", "data", "program", and "chip" can be used interchangeably.

[0346] In some embodiments, terms such as "uplink", "uplink", "physical uplink" can be interchangeable with each other, and terms such as "downlink", "downlink", "physical downlink" can be interchangeable with each other, and terms such as "side", "sidelink", "side communication", "sidelink communication", "direct connection", "direct link", "direct communication", "direct link communication" can be interchangeable with each other.

[0347] In some embodiments, "obtain", "get", "get", "receive", "transmit", "bidirectional transmission", "send and / or receive" can be interchangeable, and can be interpreted as receiving from other entities, obtaining from protocols, obtaining from higher layers, obtaining by self-processing, autonomous implementation, etc.

[0348] In some embodiments, terms such as "send", "transmit", "report", "download", "transmit", "bidirectional transmission", "send and / or receive" can be used interchangeably.

[0349] In some embodiments, terms such as "certain", "preset", "preset", "setting", "indicated", "a certain", "any", and "first" can be interchangeable. "Specific A", "preset A", "preset A", "setting A", "indicated A", "a certain A", "any A", and "first A" can be interpreted as A pre-specified in a protocol, etc., or as A obtained through setting, configuration, or indication, etc., or as specific A, a certain A, any A, or first A, etc., but not limited to this.

[0350] In some embodiments, the determination or judgment can be performed by a value represented by 1 bit (0 or 1), or by a true or false value (Boolean value) represented by true or false, or by comparison of numerical values ​​(for example, comparison with a predetermined value), but is not limited thereto.

[0351] Figure 3A is a flow chart illustrating a sidelink (SL) communication method according to an embodiment of the present disclosure. As shown in Figure 3A , the embodiment of the present disclosure relates to a sidelink (SL) communication method, which can be executed by the first terminal 101 and may include but is not limited to the following steps.

[0352] Step S3101: Obtain a first threshold.

[0353] In some embodiments, the network device 102 sends the first threshold to the first terminal 101 .

[0354] In some embodiments, the first terminal 101 receives the above-mentioned first threshold.

[0355] In some embodiments, the first terminal 101 obtains the first threshold sent by the network device 102.

[0356] In some embodiments, the first threshold is used by the first terminal 101 to determine whether the number of consecutive DTXs of the first carrier based on HARQ feedback meets the first condition.

[0357] Step S3102: for the first unicast connection, determine the number of consecutive DTXs of the first carrier based on HARQ feedback.

[0358] In some embodiments, the first carrier is one or more carriers supported by the first unicast connection between the first terminal 101 and the second terminal.

[0359] In some embodiments, the first terminal 101 determines that no HARQ feedback information is received at a PSFCH reception timing associated with a PSSCH transmission on the first carrier, and determines to update the number of consecutive DTXs of the first carrier based on the HARQ feedback.

[0360] Optionally, the first terminal 101 determines that no HARQ feedback information is received at a PSFCH reception timing associated with the PSSCH transmission on the first carrier, and determines that the number of consecutive DTXs of the first carrier based on the HARQ feedback is increased by 1.

[0361] In some embodiments, the first terminal 101 determines that HARQ feedback information is received at a PSFCH reception timing associated with a PSSCH transmission on the first carrier, and determines that the number of consecutive DTXs of the first carrier based on the HARQ feedback is reset to 0.

[0362] Step S3103: for the first unicast connection, determine whether the number of consecutive DTXs of the first carrier based on HARQ feedback is greater than or equal to a first threshold.

[0363] Step S3104: Determine whether the number of consecutive DTXs of the first carrier based on HARQ feedback meets the first condition.

[0364] Step S3105: Acquire first information including a timer.

[0365] In some embodiments, the network device 102 sends the first information including the timer to the first terminal 101 .

[0366] In some embodiments, the first terminal 101 receives the first information including the timer.

[0367] In some embodiments, the first terminal 101 receives the first information including the timer sent by the network device 102.

[0368] Step S3106: Start the timer associated with the first carrier.

[0369] Step S3107: Determine during the running period of the timer associated with the first carrier that the first resource is selected for receiving and / or sending SL data during resource selection and / or reselection.

[0370] The optional implementation of step S3107 can refer to the optional implementation of step S2207 in Figure 2B and other related parts in the embodiment involved in Figure 2A, which will not be repeated here.

[0371] Step S3108: Determine that the timer associated with the first carrier has timed out, and determine to resume using resources on the first carrier to receive and / or send SL data.

[0372] The optional implementation of step S3108 can refer to the optional implementation of step S2107 in Figure 2A and other related parts in the embodiment involved in Figure 2A, which will not be repeated here.

[0373] The method involved in the embodiment of the present disclosure may include at least one of steps S3101 to S3108.

[0374] For example, step S3107 can be implemented as an independent embodiment, step S3108 can be implemented as an independent embodiment, step S3106+step S3107 can be implemented as an independent embodiment, step S3106+step S3108 can be implemented as an independent embodiment, step S3105+step S3106+step S3107 can be implemented as an independent embodiment, step S3105+step S3106+step S3108 can be implemented as an independent embodiment, step S3101+step S3102+step S3103 can be implemented as an independent embodiment, and step S3101+step S3102+step S3103+step S3104 can be implemented as an independent embodiment, but is not limited to this.

[0375] In some embodiments, step S3101 and step S3102 may be executed in an exchanged order or simultaneously, and step S3101 and step S3105 may be executed in an exchanged order or simultaneously.

[0376] In some embodiments, step S3102, step S3103, step S3104, step S3105, step S3106, step S3107 and step S3108 are optional, and one or more of these steps may be omitted or replaced in different embodiments.

[0377] In some embodiments, step S3101, step S3103, step S3104, step S3105, step S3106, step S3107 and step S3108 are optional, and one or more of these steps may be omitted or replaced in different embodiments.

[0378] In some embodiments, step S3101, step S3102, step S3104, step S3105, step S3106, step S3107 and step S3108 are optional, and one or more of these steps may be omitted or replaced in different embodiments.

[0379] In some embodiments, step S3101, step S3102, step S3103, step S3105, step S3106, step S3107 and step S3108 are optional, and one or more of these steps may be omitted or replaced in different embodiments.

[0380] In some embodiments, step S3101, step S3102, step S3103, step S3104, step S3106, step S3107 and step S3108 are optional, and one or more of these steps may be omitted or replaced in different embodiments.

[0381] In some embodiments, step S3101, step S3102, step S3103, step S3104, step S3105, step S3107 and step S3108 are optional, and one or more of these steps may be omitted or replaced in different embodiments.

[0382] In some embodiments, step S3101, step S3102, step S3103, step S3104, step S3105, step S3106 and step S3108 are optional, and one or more of these steps may be omitted or replaced in different embodiments.

[0383] In some embodiments, step S3101, step S3102, step S3103, step S3104, step S3105, step S3106 and step S3107 are optional, and one or more of these steps may be omitted or replaced in different embodiments.

[0384] In some embodiments, reference may be made to other optional implementations described before or after the description corresponding to FIG. 3A .

[0385] FIG3B is a flow chart illustrating a sidelink SL communication method according to an embodiment of the present disclosure. As shown in FIG3B , the embodiment of the present disclosure relates to a sidelink SL communication method, which can be executed by the first terminal 101 and can include but is not limited to the following steps.

[0386] Step S3201: Obtain a first threshold.

[0387] The optional implementation of step S3201 can refer to the optional implementation of step S3101 in Figure 3A and other related parts in the embodiment involved in Figure 3A, which will not be repeated here.

[0388] Step S3202: for the first unicast connection, determine the number of consecutive DTXs of the first carrier based on HARQ feedback.

[0389] The optional implementation of step S3202 can refer to the optional implementation of step S3102 in Figure 3A and other related parts in the embodiment involved in Figure 3A, which will not be repeated here.

[0390] Step S3203: for the first unicast connection, determine whether the number of consecutive DTXs of the first carrier based on HARQ feedback is greater than or equal to a first threshold.

[0391] The optional implementation of step S3203 can refer to the optional implementation of step S3103 in Figure 3A and other related parts in the embodiment involved in Figure 3A, which will not be repeated here.

[0392] Step S3204: Determine whether the number of consecutive DTXs of the first carrier based on HARQ feedback meets the first condition.

[0393] The optional implementation of step S3204 can refer to the optional implementation of step S3104 in Figure 3A and other related parts in the embodiment involved in Figure 3A, which will not be repeated here.

[0394] Step S3205: Obtain measurement configuration information.

[0395] In some embodiments, the network device 102 sends the above-mentioned measurement configuration information to the first terminal 101.

[0396] In some embodiments, the first terminal 101 receives the above-mentioned measurement configuration information.

[0397] In some embodiments, the first terminal 101 obtains the above-mentioned measurement configuration information sent by the network device 102.

[0398] In some embodiments, the measurement configuration information includes at least one of the following: RSSI measurement configuration; RSRP measurement configuration; CO measurement configuration; CBR measurement configuration.

[0399] In some embodiments, the first terminal 101 allocates sidelink transmission resources by autonomously selecting sidelink transmission resources or scheduling transmission resources by the network device 102. Optionally, the first terminal 101 is in any of the following states: RRC connected state; RRC idle state; RRC inactive state; or out-of-coverage state.

[0400] That is, the side link SL communication method provided in the embodiment of the present disclosure is applicable to a mode 1 terminal device in the following state. Alternatively, the side link SL communication method provided in the embodiment of the present disclosure is applicable to a mode 2 terminal device in any one of the RRC connected state, RRC idle state, RRC inactive state, and out-of-coverage state. Alternatively, the side link SL communication method provided in the embodiment of the present disclosure is applicable to a mode 2 terminal device in any one of the RRC idle state, RRC inactive state, and out-of-coverage state.

[0401] Step S3206: Obtain a preset threshold.

[0402] In some embodiments, the network device 102 sends the above-mentioned preset threshold to the first terminal 101.

[0403] In some embodiments, the first terminal 101 receives the above-mentioned preset threshold.

[0404] In some embodiments, the first terminal 101 receives a preset threshold sent by the network device 102 .

[0405] In some embodiments, the first terminal 101 obtains the preset threshold through preconfiguration. For example, the first terminal 101 obtains a preconfigured preset threshold.

[0406] In some embodiments, the first terminal 101 determines the preset threshold based on implementation.

[0407] In some embodiments, the preset threshold is used by the first terminal 101 to determine whether to restore the first carrier according to the measurement result associated with the first carrier.

[0408] Step S3207: perform measurement according to the measurement configuration information to determine a measurement result associated with the first carrier.

[0409] As an example, the first terminal 101 performs measurement according to the RSSI measurement configuration to determine the RSSI measurement result associated with the first carrier.

[0410] As an example, the first terminal 101 performs measurement according to the RSRP measurement configuration to determine the RSRP measurement result associated with the first carrier.

[0411] As an example, the first terminal 101 performs measurement according to the CO measurement configuration to determine the CO measurement result associated with the first carrier.

[0412] As an example, the first terminal 101 performs measurement according to the CBR measurement configuration to determine a CBR measurement result associated with the first carrier.

[0413] In some embodiments, the measurement configuration information includes a CBR measurement configuration; the first terminal 101 performs measurement according to the measurement configuration information to determine the measurement result associated with the first carrier, which may include: performing CBR measurement on the first resource pool of the first carrier according to the CBR measurement configuration to determine the CBR measurement result of the first resource pool on the first carrier; and determining the CBR measurement result of the first resource pool as the CBR measurement result associated with the first carrier.

[0414] Exemplarily, the first terminal 101 performs CBR measurement on the first resource pool of the first carrier according to the CBR measurement configuration, determines the CBR measurement result of the first resource pool on the first carrier; and determines the CBR measurement result of the first resource pool as the CBR measurement result associated with the first carrier.

[0415] Step S3208: Determine that the measurement result associated with the first carrier is less than or equal to the preset threshold, and determine to resume using the resources on the first carrier to receive and / or send SL data, or determine that the measurement result associated with the first carrier is greater than or equal to the preset threshold, and determine to select the first resource to receive and / or send SL data during resource selection and / or reselection.

[0416] The optional implementation of step S3208 can refer to the optional implementation of step S2205 in Figure 2B and other related parts in the embodiment involved in Figure 2B, which will not be repeated here.

[0417] The method involved in the embodiment of the present disclosure may include at least one of steps S3201 to S3206. For example,

[0418] Step S3201+Step S3203 can be implemented as an independent embodiment, step S3203+Step S3204 can be implemented as an independent embodiment, step S3201+Step S3203+Step S3204 can be implemented as an independent embodiment, step S3202+Step S3203+Step S3204 can be implemented as an independent embodiment, but are not limited to this.

[0419] In some embodiments, step S3202, step S3203, step S3204, step S3205, step S3206, step S3207 and step S3208 are optional, and one or more of these steps may be omitted or replaced in different embodiments.

[0420] In some embodiments, step S3201, step S3203, step S3204, step S3205, step S3206, step S3207 and step S3208 are optional, and one or more of these steps may be omitted or replaced in different embodiments.

[0421] In some embodiments, step S3201, step S3202, step S3204, step S3205, step S3206, step S3207 and step S3208 are optional, and one or more of these steps may be omitted or replaced in different embodiments.

[0422] In some embodiments, step S3201, step S3202, step S3203, step S3205, step S3206, step S3207 and step S3208 are optional, and one or more of these steps may be omitted or replaced in different embodiments.

[0423] In some embodiments, step S3201, step S3202, step S3203, step S3204, step S3206, step S3207 and step S3208 are optional, and one or more of these steps may be omitted or replaced in different embodiments.

[0424] In some embodiments, step S3201, step S3202, step S3203, step S3204, step S3205, step S3206 and step S3208 are optional, and one or more of these steps may be omitted or replaced in different embodiments.

[0425] In some embodiments, step S3201, step S3202, step S3203, step S3204, step S3205, step S3206 and step S3207 are optional, and one or more of these steps may be omitted or replaced in different embodiments.

[0426] In some embodiments, reference may be made to other optional implementations described before or after the description corresponding to FIG. 3B .

[0427] Figure 3C is a flow chart illustrating a sidelink SL communication method according to an embodiment of the present disclosure. As shown in Figure 3C, the embodiment of the present disclosure relates to a sidelink SL communication method, which can be executed by the first terminal 101 and may include but is not limited to the following steps.

[0428] Step S3301: Determine whether the number of consecutive discontinuous transmissions (DTX) of a first carrier based on hybrid automatic repeat request (HARQ) feedback meets a first condition.

[0429] Exemplarily, the first terminal 101 determines the number of continuous and discontinuous transmissions of DTX by the first carrier based on hybrid automatic repeat request HARQ feedback according to a pre-set counting rule, thereby determining that the number of continuous and discontinuous transmissions of DTX by the first carrier based on hybrid automatic repeat request HARQ feedback meets the first condition.

[0430] Step S3302: Obtain first information.

[0431] In some embodiments, the network device 102 sends the above-mentioned first information to the first terminal 101.

[0432] In some embodiments, the first terminal 101 receives the above-mentioned first information.

[0433] In some embodiments, the first terminal 101 obtains the above-mentioned first information sent by the network device 102.

[0434] Step S3303: Determine a timer associated with the first carrier according to the first information.

[0435] Exemplarily, the first terminal 101 determines the specific configuration of the timer associated with the first carrier according to the relevant configuration information in the first information.

[0436] Step S3304: Start the timer associated with the first carrier.

[0437] Step S3305: Determine that during the timer associated with the first carrier is running, determine not to restore the first carrier.

[0438] In some embodiments, the first terminal 101 determines that a timer associated with the first carrier is running, and determines to select the first resource to receive and / or send SL data during resource selection and / or reselection.

[0439] Step S3306: Determine that the timer associated with the first carrier has timed out, and determine to restore the first carrier.

[0440] In some embodiments, the first terminal 101 determines that a timer associated with the first carrier has expired, and determines to resume using resources on the first carrier to receive and / or send SL data.

[0441] The method involved in the embodiment of the present disclosure may include at least one of steps S3301 to S3306. For example, step S3304+step S3305 can be implemented as an independent embodiment, step S3304+step S3306 can be implemented as an independent embodiment, step S3303+step S3304+step S3305+step S3306 can be implemented as an independent embodiment, step S3304+step S3305+step S3306 can be implemented as an independent embodiment, step S3301+step S3304+step S3305 can be implemented as an independent embodiment, step S3301+step S3304+step S3306 can be implemented as an independent embodiment, step S3302+step S3303+step S3304+step S3305 can be implemented as an independent embodiment, step S3302+step S3303+step S3304+step S3306 can be implemented as an independent embodiment, but is not limited to this.

[0442] In some embodiments, step S3302, step S3303, step S3304, step S3305 and step S3306 are optional, and one or more of these steps may be omitted or replaced in different embodiments.

[0443] In some embodiments, step S3301, step S3303, step S3304, step S3305 and step S3306 are optional, and one or more of these steps may be omitted or replaced in different embodiments.

[0444] In some embodiments, step S3301, step S3302, step S3304, step S3305 and step S3306 are optional, and one or more of these steps may be omitted or replaced in different embodiments.

[0445] In some embodiments, step S3301, step S3302, step S3303, step S3305 and step S3306 are optional, and one or more of these steps may be omitted or replaced in different embodiments.

[0446] In some embodiments, step S3301, step S3302, step S3303, step S3304 and step S3306 are optional, and one or more of these steps may be omitted or replaced in different embodiments.

[0447] In some embodiments, step S3301, step S3302, step S3303, step S3304 and step S3305 are optional, and one or more of these steps may be omitted or replaced in different embodiments.

[0448] In some embodiments, reference may be made to other optional implementations described before or after the description corresponding to FIG. 3C .

[0449] Figure 3D is a flow chart illustrating a sidelink SL communication method according to an embodiment of the present disclosure. As shown in Figure 3D, the embodiment of the present disclosure relates to a sidelink SL communication method, which can be executed by the first terminal 101 and can include but is not limited to the following steps.

[0450] Step S3401: Determine whether the number of consecutive discontinuous transmissions (DTX) of a first carrier based on hybrid automatic repeat request (HARQ) feedback meets a first condition.

[0451] The optional implementation of step S3401 can refer to the optional implementation of step S3301 in Figure 3C and other related parts in the embodiment involved in Figure 3C, which will not be repeated here.

[0452] Step S3402: Acquire measurement configuration information.

[0453] The optional implementation of step S3402 can refer to the optional implementation of step S3201 in Figure 3B and other related parts in the embodiment involved in Figure 3B, which will not be repeated here.

[0454] Step S3403: perform measurement according to the measurement configuration information to determine a measurement result associated with the first carrier.

[0455] The optional implementation of step S3403 can refer to the optional implementation of step S2204 in Figure 2B and other related parts in the embodiment involved in Figure 2B, which will not be repeated here.

[0456] Step S3404: Determine whether to restore the first carrier according to the measurement result associated with the first carrier.

[0457] In one implementation, the first terminal 101 determines that the measurement result is less than or equal to a preset threshold, and determines to resume using the resources on the first carrier to receive and / or send SL data, or determines that the measurement result is greater than or equal to the preset threshold, and determines to select resources other than the first carrier to receive and / or send SL data during resource selection and / or reselection.

[0458] The method involved in the embodiments of the present disclosure may include at least one of steps S3401 to S3403. For example, step S3401 may be implemented as an independent embodiment, step S3402 may be implemented as an independent embodiment, and step S3402 + step S3403 may be implemented as independent embodiments, but the present invention is not limited thereto.

[0459] In some embodiments, step S3402, step S3403, and step S3404 are optional, and one or more of these steps may be omitted or replaced in different embodiments.

[0460] In some embodiments, step S3401, step S3403, and step S3404 are optional, and one or more of these steps may be omitted or replaced in different embodiments.

[0461] In some embodiments, step S3401, step S3402, and step S3404 are optional, and one or more of these steps may be omitted or replaced in different embodiments.

[0462] In some embodiments, reference may be made to other optional implementations described before or after the description corresponding to FIG. 3D .

[0463] Figure 4A is a flow chart illustrating a sidelink (SL) communication method according to an embodiment of the present disclosure. As shown in Figure 4A , the embodiment of the present disclosure relates to a sidelink (SL) communication method, which can be executed by the network device 102 and may include, but is not limited to, the following steps.

[0464] Step S4101: Send first information including a timer associated with a first carrier to a first terminal.

[0465] The timer associated with the first carrier is used to indicate whether the first terminal 101 restores the first carrier.

[0466] Step S4102: Send a first threshold to the first terminal.

[0467] In some embodiments, the first threshold is used by the first terminal 101 to determine whether the number of consecutive DTXs of the first carrier based on requesting HARQ feedback meets the first condition.

[0468] The method involved in the embodiment of the present disclosure may include at least one of step S4101 and step 4102.

[0469] In some embodiments, step S4101 is optional, and one or more of these steps may be omitted or replaced in different embodiments.

[0470] In some embodiments, step S4102 is optional, and one or more of these steps may be omitted or replaced in different embodiments.

[0471] In some embodiments, step S4101 and step S4102 may be executed in an interchanged order or simultaneously.

[0472] In some embodiments, reference may be made to other optional implementations described before or after the description corresponding to FIG. 4A .

[0473] FIG4B is a flow chart illustrating a sidelink SL communication method according to an embodiment of the present disclosure. As shown in FIG4A , the embodiment of the present disclosure relates to a sidelink SL communication method, which can be executed by the network device 102 and can include but is not limited to the following steps.

[0474] Step S4201: Send measurement configuration information to the first terminal.

[0475] In some embodiments, the measurement configuration information is used by the first terminal 101 to perform measurement and determine a measurement result associated with the first carrier. The first terminal may determine whether to restore the first carrier based on the measurement result associated with the first carrier.

[0476] Optionally, the measurement configuration information includes at least one of the following: RSSI measurement configuration; RSRP measurement configuration; CO measurement configuration; CBR measurement configuration.

[0477] Step S4202: Send a preset threshold to the first terminal.

[0478] In some embodiments, the preset threshold is used by the first terminal 101 to determine whether the measurement result associated with the first carrier obtained according to the measurement configuration information is greater than the corresponding threshold.

[0479] Step S4203: Send the first threshold to the first terminal.

[0480] In some embodiments, the first threshold is used by the first terminal 101 to determine whether the number of consecutive DTXs of the first carrier based on requesting HARQ feedback meets the first condition.

[0481] The method involved in the embodiments of the present disclosure may include at least one of steps S4201 to S4203. For example, step S4201 can be implemented as an independent embodiment, step S4202 can be implemented as an independent embodiment, step S4203 can be implemented as an independent embodiment, step S4201 + step S4202 can be implemented as an independent embodiment, step S4201 + step S4203 can be implemented as an independent embodiment, and step S4102 + step S4203 can be implemented as an independent embodiment, but the present invention is not limited thereto.

[0482] In some embodiments, step S4201 and step S4202 are optional, and one or more of these steps may be omitted or replaced in different embodiments.

[0483] In some embodiments, step S4201 and step S4203 are optional, and one or more of these steps may be omitted or replaced in different embodiments.

[0484] In some embodiments, step S4202 and step S4203 are optional, and one or more of these steps may be omitted or replaced in different embodiments.

[0485] In some embodiments, step S4201, step S4202, and step S4203 may be executed in an interchangeable order or simultaneously.

[0486] In some embodiments, reference may be made to other optional implementations described before or after the description corresponding to FIG. 4B .

[0487] Figure 4C is a flow chart illustrating a sidelink SL communication method according to an embodiment of the present disclosure. As shown in Figure 4A, the embodiment of the present disclosure relates to a sidelink SL communication method, which can be executed by the network device 102 and may include but is not limited to the following steps.

[0488] Step S4301: Send first information to the first terminal.

[0489] In some embodiments, the first information is used to instruct the first terminal 101 to determine whether to resume the first carrier when the number of consecutive discontinuous transmissions (DTX) of the first carrier based on hybrid automatic repeat request (HARQ) feedback meets a first condition. Optionally, the first carrier is one or more carriers supported by the first unicast connection between the first terminal 101 and the second terminal.

[0490] In some embodiments, the first information includes measurement configuration information, which is used by the first terminal 101 to perform measurement and determine the measurement result associated with the first carrier, and the measurement result associated with the first carrier is used to instruct the first terminal 101 to determine whether to restore the first carrier.

[0491] In some embodiments, the first information includes a timer associated with the first carrier, and the timer associated with the first carrier is used to indicate whether the first terminal 101 resumes the first carrier.

[0492] Figure 5 is an interactive diagram of a sidelink (SL) communication method according to an embodiment of the present disclosure. As shown in Figure 5 , the method according to an embodiment of the present disclosure can be applied to a communication system 100, and the method includes but is not limited to the following steps.

[0493] Step S5101: The network device 102 sends first information to the first terminal 101.

[0494] In some embodiments, the first information includes a timer associated with the first carrier configured by the network device 102 .

[0495] In some embodiments, the first information includes measurement configuration information. Optionally, the measurement configuration information includes at least one of the following: RSSI measurement configuration; RSRP measurement configuration; CO measurement configuration; CBR measurement configuration.

[0496] Step S5102: The first terminal 101 determines whether the number of consecutive discontinuous transmissions (DTX) of the first carrier based on hybrid automatic repeat request (HARQ) feedback meets a first condition.

[0497] In some embodiments, the first carrier is one or more carriers supported by the first unicast connection between the first terminal 101 and the second terminal; the second terminal is any terminal that has a unicast connection with the first terminal 101.

[0498] In some embodiments, the first terminal 101 obtains a first threshold; and for the first unicast connection, determines that the number of consecutive DTXs of the first carrier based on HARQ feedback is greater than or equal to the first threshold; thereby determining that the number of consecutive DTXs of the first carrier based on HARQ feedback meets the first condition.

[0499] Step S5103: The first terminal 101 determines whether to restore the first carrier according to the first information.

[0500] In some embodiments, the first terminal 101 starts a timer associated with the first carrier determined according to the first information; during the timer associated with the first carrier, the first carrier is not restored.

[0501] In some embodiments, the first terminal 101 starts a timer associated with the first carrier determined according to the first information; determines that the timer associated with the first carrier times out, and determines to restore the first carrier.

[0502] In some embodiments, the first terminal 101 performs measurement according to the configuration information in the first information to determine the measurement result associated with the first carrier; and determines whether to restore the first carrier according to the measurement result associated with the first carrier.

[0503] FIG6A is a schematic diagram of a sidelink SL communication method according to an embodiment of the present disclosure. As shown in FIG6A , the method includes but is not limited to the following steps.

[0504] Step 6101: define a timer. When the terminal device detects that the DTX count based on HARQ feedback of the first carrier reaches the maximum value, the terminal device starts the timer. When the timer times out, the terminal device considers that the first carrier can be restored to use.

[0505] In some embodiments, the first carrier is one or more carriers supported by the unicast connection between the terminal device and other terminal device brackets.

[0506] In some embodiments, a terminal device in an RRC connected state may obtain the timer configuration through dedicated signaling.

[0507] Exemplarily, a terminal device in an RRC connected state obtains a timer configuration through dedicated signaling to define a timer according to the timer configuration. The terminal device determines that the timer is started when the DTX count based on the HARQ feedback of the first carrier reaches a maximum value, and after the timer times out, the terminal device considers that the first carrier can be restored to use.

[0508] In some embodiments, a terminal device in an RRC IDLE (idle) / INACTIVE (inactive) state may obtain the timer configuration via the SIB.

[0509] Exemplarily, a terminal device in an RRC IDLE state obtains a timer configuration through an SIB to define a timer according to the timer configuration. The terminal device determines that the DTX count based on the HARQ feedback of the first carrier reaches a maximum value and starts the timer. After the timer times out, the terminal device considers that the first carrier can be restored to use.

[0510] Exemplarily, a terminal device in an RRC INACTIVE state obtains a timer configuration through an SIB to define a timer according to the timer configuration. The terminal device determines that the timer is started when the DTX count based on the HARQ feedback of the first carrier reaches a maximum value, and after the timer expires, the terminal device considers that the first carrier can be restored to use.

[0511] In some embodiments, a terminal device in an OOC (out of coverage) state may obtain the timer configuration through pre-configuration.

[0512] Exemplarily, a terminal device in the OOC state obtains a timer configuration through pre-configuration to define a timer according to the timer configuration. The terminal device starts the timer when it determines that the DTX count based on the HARQ feedback of the first carrier has reached a maximum value. After the timer expires, the terminal device considers that the first carrier can be restored to use.

[0513] In some embodiments, the timer configuration may be configured at a carrier / BWP granularity, and different carriers / BWPs may be configured with the same or different timers.

[0514] As an example, the corresponding timer lengths can be pre-set for different carriers, so that the terminal device can define timers of different lengths according to the different carriers obtained. Optionally, the lengths of the timers corresponding to different carriers can be the same or different.

[0515] As an example, corresponding timer lengths may be pre-set for different BWP granularities, so that the terminal device may define timers of different lengths according to different acquired BWP granularities.

[0516] In some embodiments, the timer may be configured according to UE granularity, and different UEs may be configured with the same or different timers.

[0517] Exemplarily, corresponding timer lengths may be pre-set for different UE granularities, so that the terminal device may define timers of different lengths according to the different UE granularities obtained.

[0518] In some embodiments, the terminal device may determine the timer by implementation.

[0519] In some embodiments, the terminal device starts the timer when it detects that the DTX count of the first carrier based on HARQ feedback reaches a maximum value.

[0520] In some embodiments, while the timer is running, the terminal device does not use resources on the first carrier to receive or send SL data, including PSSCH, and / or PSCCH, and / or PSFCH, and / or SSB.

[0521] Specifically, the terminal device may not select the resources of the first carrier during resource selection or reselection.

[0522] As an example, the terminal device may not select the resources of the first carrier when selecting resources.

[0523] As another example, the terminal device may not select the resources of the first carrier during resource reselection.

[0524] In some embodiments, when the timer times out, the terminal device considers that the first carrier can be restored to use and can use the resources on the first carrier to receive and / or send SL data.

[0525] As an example, when the timer times out, the terminal device believes that the first carrier can be restored to use and can use the resources on the first carrier to receive SL data.

[0526] As an example, when the timer times out, the terminal device believes that the first carrier can be restored to use and can use the resources on the first carrier to send SL data.

[0527] As an example, when the timer times out, the terminal device considers that the first carrier can be restored to use and can use the resources on the first carrier to receive and send SL data.

[0528] Specifically, the terminal device may select resources on the first carrier during resource selection or reselection.

[0529] In some embodiments, the above technical solution is applicable to a mode 2 terminal device in RRC IDLE / INACTIVE / OOC.

[0530] In some embodiments, the above technical solution is applicable to a mode 2 terminal device, which may be in an RRC CONNECTED / IDLE / INACTIVE / OOC state.

[0531] In some embodiments, the specific value of the above maximum value can be obtained through configuration or pre-configuration, or can be determined by UE implementation.

[0532] As an example, the terminal device obtains the specific value of the above maximum value through the configuration of the network side device.

[0533] As another example, the terminal device obtains the specific value of the above maximum value through pre-configuration.

[0534] As another example, the terminal device determines the specific value of the above maximum value through its own implementation.

[0535] FIG6B is a schematic diagram of a sidelink SL communication method according to an embodiment of the present disclosure. As shown in FIG6B , the method includes but is not limited to the following steps.

[0536] Step 6201: The terminal device determines whether the first carrier can be restored to use based on the RSSI / RSRP / CO / CBR measurement results of the first carrier.

[0537] In some embodiments, the first carrier is one or more carriers supported by the unicast connection between the terminal device and other terminal device brackets.

[0538] As an example, the terminal device determines whether the first carrier can be restored to use based on the RSSI measurement result of the first carrier.

[0539] As an example, the terminal device determines whether the first carrier can be restored to use based on the RSRP measurement result of the first carrier.

[0540] As an example, the terminal device determines whether the first carrier can be restored to use according to the CO measurement result of the first carrier.

[0541] As an example, the terminal device determines whether the first carrier can be restored to use based on the CBR measurement result of the first carrier.

[0542] As an example, the terminal device determines whether the first carrier can be restored to use based on the CBR measurement result of the first carrier.

[0543] As an example, the terminal device determines whether the first carrier can be restored to use based on the RSSI measurement result and RSRP measurement result of the first carrier.

[0544] As an example, the terminal device determines whether the first carrier can be restored to use based on the RSSI measurement result and the CO measurement result of the first carrier.

[0545] As an example, the terminal device determines whether the first carrier can be restored to use based on the RSSI measurement result and the CBR measurement result of the first carrier.

[0546] As an example, the terminal device determines whether the first carrier can be restored to use based on the RSRP measurement result and CO measurement result of the first carrier.

[0547] As an example, the terminal device determines whether the first carrier can be restored to use based on the RSRP measurement result and CBR measurement result of the first carrier.

[0548] As an example, the terminal device determines whether the first carrier can be restored to use according to the CO measurement result and the CBR measurement result of the first carrier.

[0549] As an example, the terminal device determines whether the first carrier can be restored to use based on the RSSI measurement result, RSRP measurement result and CO measurement result of the first carrier.

[0550] As an example, the terminal device determines whether the first carrier can be restored to use based on the RSSI measurement result, RSRP measurement result and CBR measurement result of the first carrier.

[0551] As an example, the terminal device determines whether the first carrier can be restored to use based on the RSSI measurement result, CO measurement result and CBR measurement result of the first carrier.

[0552] As an example, the terminal device determines whether the first carrier can be restored to use based on the RSRP measurement result, CO measurement result and CBR measurement result of the first carrier.

[0553] As an example, the terminal device determines whether the first carrier can be restored to use based on the RSSI measurement result, RSRP measurement result, CO measurement result and CBR measurement result of the first carrier.

[0554] In some embodiments, the terminal device determines that the measurement result is less than or equal to a preset threshold value, and determines that the first carrier can be restored to use.

[0555] In some embodiments, the threshold values ​​corresponding to the RSSI measurement result, the RSRP measurement result, the CO measurement result, and the CBR measurement result may be the same or different.

[0556] In some embodiments, this solution may only be applicable to mode 2 terminal devices in any of the RRC IDLE / INACTIVE / OOC states.

[0557] In some embodiments, the solution may be applicable to a mode 2 terminal device, which may be in any of the following states: RRC CONNECTED / IDLE / INACTIVE / OOC.

[0558] In some embodiments, the above measurement results may also be measurement results of other reference signals that can measure channel quality, which is not specifically limited in the present disclosure.

[0559] Step 6202: The terminal device determines that the measurement result associated with the first carrier is greater than or equal to the first threshold, and the terminal device determines that the first carrier cannot be restored to use.

[0560] In some embodiments, the first threshold may be configured or pre-configured by the network.

[0561] In some embodiments, the UE within the coverage area may obtain the first threshold through dedicated RRC signaling or SIB.

[0562] As an example, a UE outside the coverage of the network device may obtain the first threshold through dedicated RRC signaling.

[0563] As an example, a UE that is out of coverage of the network device may obtain the first threshold through the SIB.

[0564] In some embodiments, the UE out of coverage may obtain the first threshold through pre-configuration.

[0565] In some embodiments, the terminal device may respectively determine the first threshold corresponding to each of the RSSI, RSRP, CO and CBR measurement results, and the first threshold corresponding to each of the RSSI, RSRP, CO and CBR measurement results may be the same or different.

[0566] In some embodiments, the terminal device measures RSSI according to the measurement configuration on the network side and obtains the RSSI measurement result. If the RSSI measurement result is greater than or equal to the first threshold, the terminal device determines that the first carrier whose DTX count reaches the maximum value based on HARQ feedback cannot be restored to use, and the terminal device does not use the resources on the first carrier to receive or send SL data. The above-mentioned SL data includes PSSCH, and / or PSCCH, and / or PSFCH, and / or SSB.

[0567] In some embodiments, the terminal device measures CO according to the CO measurement configuration measured by the network and obtains the CO measurement result. If the CO measurement result is greater than or equal to the first threshold, the terminal device determines that the first carrier whose DTX count reaches the maximum value based on HARQ feedback cannot be restored to use, and the terminal device does not use the resources on the first carrier to receive or send SL data. The above-mentioned SL data includes PSSCH, and / or PSCCH, and / or PSFCH, and / or SSB.

[0568] In some embodiments, the terminal device measures RSRP according to the RSRP measurement configuration measured by the network and obtains the RSRP measurement result. The terminal device determines that the first carrier whose DTX count reaches the maximum value based on HARQ feedback cannot be restored to use, and the terminal device does not use the resources on the first carrier to receive or send SL data, including PSSCH, and / or PSCCH, and / or PSFCH, and / or SSB.

[0569] In some embodiments, the UE measures the CBR according to the CBR measurement configuration measured by the network and obtains the CBR measurement result. If the CBR measurement result is greater than or equal to the first threshold, the terminal device determines that the first carrier whose DTX count reaches the maximum value based on HARQ feedback cannot be restored to use, and the terminal device does not use the resources on the first carrier to receive or send SL data. The above-mentioned SL data includes PSSCH, and / or PSCCH, and / or PSFCH, and / or SSB.

[0570] Exemplarily, the terminal device obtains the CBR of the carrier, and the CBR of the carrier can be the CBR of the resource pool on the carrier. For example, the measured CBR of the first resource pool selected on the carrier is the CBR of the carrier. If the CBR measurement result belonging to the first carrier is greater than or equal to the first threshold, the terminal device determines that the first carrier whose DTX count reaches the maximum value based on HARQ feedback cannot be restored to use, and the terminal device does not use the resources on the first carrier to receive or send SL data, and the above-mentioned SL data includes at least one of the following: PSSCH, PSCCH, PSFCH and SSB.

[0571] In some embodiments, a possible solution is that any two combinations or three indicators among RSSI / RSRP / CO / CBR are greater than or equal to their respective corresponding thresholds, the terminal device determines that the first carrier cannot be restored to use, and the terminal device does not use the resources on the first carrier to receive or send SL data.

[0572] As an example, take the case where a terminal device determines whether the first carrier can be restored to use based on the measurement results of any three of the first carrier's RSSI / RSRP / CO / CBR. If the measurement results of any two of the three items are greater than the corresponding thresholds, the terminal device determines that the first carrier cannot be restored to use.

[0573] As an example, take the case where a terminal device determines whether the first carrier can be restored to use based on the measurement results of any three of the first carrier's RSSI / RSRP / CO / CBR. If the three measurement results are all greater than the corresponding thresholds, the terminal device determines that the first carrier cannot be restored to use.

[0574] As an example, the terminal device determines whether the first carrier can be restored based on the RSSI, RSRP, CO and CBR measurement results of the first carrier. If any two measurement results are greater than the corresponding thresholds, the terminal device determines that the first carrier cannot be restored.

[0575] As an example, the terminal device determines whether the first carrier can be restored based on the RSSI, RSRP, CO and CBR measurement results of the first carrier. If any three measurement results are greater than the corresponding thresholds, the terminal device determines that the first carrier cannot be restored.

[0576] As an example, take the example of a terminal device determining whether the first carrier can be restored to use based on the RSSI, RSRP, CO, and CBR measurement results of the first carrier. If the measurement results of RSSI, RSRP, CO, and CBR are all greater than the corresponding thresholds, the terminal device determines that the first carrier cannot be restored to use.

[0577] Step 6203: The terminal device determines that the measurement result associated with the first carrier is less than or equal to the first threshold, and the terminal device determines that the first carrier can be restored to use.

[0578] The present disclosure also provides an apparatus for implementing any of the above methods. For example, an apparatus is provided that includes units or modules for implementing each step performed by the first terminal in any of the above methods. For another example, another apparatus is provided that includes units or modules for implementing each step performed by the network device in any of the above methods.

[0579] It should be understood that the division of the various units or modules in the above device is merely a division of logical functions. In actual implementation, they may be fully or partially integrated into a physical entity, or they may be physically separated. In addition, the units or modules in the device may 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 the memory stores instructions. The processor calls the instructions stored in the memory to implement any of the above methods or implement the functions of the various 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 within 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-mentioned hardware circuits can be understood as one or more processors; for example, in one implementation, the above-mentioned hardware circuit is an application-specific integrated circuit (ASIC), which realizes the functions of some or all of the above units or modules by designing the logical relationship of the components in the circuit; for example, in another implementation, the above-mentioned hardware circuit can be realized by a programmable logic device (PLD). Taking a field programmable gate array (FPGA) as an example, it can include a large number of logic gate circuits, and the connection relationship between the logic gate circuits is configured by configuring the configuration file, thereby realizing 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 software called by the processor, or in the form of hardware circuits, or in part by the form of software called by the processor, and the rest by hardware circuits.

[0580] In an embodiment of the present disclosure, the processor is a circuit with sidelink SL communication capability. In one implementation, the processor may be a circuit with instruction reading and execution capability, such as a central processing unit (CPU), a microprocessor, a graphics processing unit (GPU) (which can be understood as a microprocessor), or a digital sidelink SL communicator (digital signal processor, DSP), etc. In another implementation, the processor may implement certain functions through the logical relationship of a hardware circuit, and the logical relationship of the above-mentioned hardware circuit is fixed or reconfigurable, such as a hardware circuit implemented by an application-specific integrated circuit (ASIC) or a programmable logic device (PLD), such as an FPGA. In a reconfigurable hardware circuit, the process of the processor loading a configuration document to implement the hardware circuit configuration can 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 can also be a hardware circuit designed for artificial intelligence, which can be understood as ASIC, such as a neural network processing unit (NPU), a tensor processing unit (TPU), a deep learning processing unit (DPU), etc.

[0581] Figure 7A is a schematic diagram of the structure of a first terminal 7100 proposed in an embodiment of the present disclosure. As shown in Figure 7A, the first terminal 7100 may include: a transceiver module 7101, a processing module 7102, etc. In some embodiments, the processing module 7101 is used to determine whether the number of consecutive discontinuous transmissions (DTX) of the first carrier based on hybrid automatic repeat request (HARQ) feedback meets a first condition; wherein the first carrier is one or more carriers supported by the first unicast connection between the first communication device and the second terminal; the second terminal is any terminal that has a unicast connection with the first communication device; the processing module 7101 is further used to obtain first information; the processing module 7101 is further used to determine whether the first communication device restores the first carrier based on the first information. Optionally, the transceiver module is used to perform at least one of the communication steps such as sending and / or receiving performed by the first terminal 101 in any of the above methods (for example, step S3101, step S3201, step S3205, step S3206, step S3302, and step S3402, but not limited thereto), which will not be repeated here. Optionally, the above-mentioned processing module is used to execute at least one of the other steps performed by the terminal device 102 in any of the above methods (for example, step S3102, step S3103, step S3104, step S3105, step S3106, step S3107, step S3108, step S3202, step S3203, step S3204, step S3207, step S3208, step S3301, step S3303, step S3304, step S3305, step S3306, step S3402, step S3403, but not limited to these), which are not repeated here.

[0582] Figure 7B is a structural diagram of a network device 7200 proposed in an embodiment of the present disclosure. As shown in Figure 7B, the network device 7200 may include: at least one of a transceiver module 7201, a processing module 7202, etc. In some embodiments, the transceiver module 7202 is used to send first information to the first terminal; wherein the first information is used to instruct the first terminal to determine whether to restore the first carrier when the number of consecutive discontinuous transmissions (DTX) of the first carrier based on hybrid automatic repeat request HARQ feedback meets the first condition, wherein the first carrier is one or more carriers supported by the first unicast connection between the first terminal and the second terminal. Optionally, the transceiver module is used to execute at least one of the communication steps such as sending and / or receiving performed by the second terminal 7200 in any of the above methods (for example, step S4101, step S4102, step S4201, step S4202, step S4203, step S4301, but not limited thereto), which will not be repeated here.

[0583] In some embodiments, the transceiver module may include a transmitting module and / or a receiving module, and the transmitting module and the receiving module may be separate or integrated. Optionally, the transceiver module may be interchangeable with the transceiver.

[0584] In some embodiments, the processing module can be a single module or can include multiple submodules. Optionally, the multiple submodules respectively execute all or part of the steps required to be executed by the processing module. Optionally, the processing module can be interchangeable with the processor.

[0585] Figure 8A is a schematic diagram of the structure of a communication device 8100 proposed in an embodiment of the present disclosure. Communication device 8100 can be a first terminal, a network device, a chip, a chip system, or a processor that supports a first terminal in implementing any of the above methods, or a chip, a chip system, or a processor that supports a network device in implementing any of the above methods. Communication device 8100 can be used to implement the methods described in the above method embodiments. For details, please refer to the description of the above method embodiments.

[0586] As shown in Figure 8A, the communication device 8100 includes one or more processors 8101. The processor 8101 can be a general-purpose processor or a dedicated processor, for example, a baseband processor or a central processing unit. The baseband processor can be used to process communication protocols and communication data, and the central processing unit can 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 programs, and process program data. The communication device 8100 is used to perform any of the above methods.

[0587] In some embodiments, the communication device 8100 further includes one or more memories 8102 for storing instructions. Optionally, all or part of the memories 8102 may be located outside the communication device 8100.

[0588] In some embodiments, the communication device 8100 further includes one or more transceivers 8103. When the communication device 8100 includes one or more transceivers 8103, the transceiver 8103 performs at least one of the communication steps such as sending and / or receiving in the above method (for example, step S3101, step S3107, step S3108, step S3201, step S3102, but not limited thereto), and the processor 8101 performs at least one of the other steps (for example, step S3104, step S3105, step S3106, step S3202, step S3203, step S3103, but not limited thereto).

[0589] In some embodiments, a transceiver may include a receiver and / or a transmitter. The receiver and transmitter may be separate or integrated. Optionally, the terms transceiver, transceiver unit, transceiver, and transceiver circuit may be used interchangeably; the terms transmitter, transmitting unit, transmitter, and transmitting circuit may be used interchangeably; and the terms receiver, receiving unit, receiver, and receiving circuit may be used interchangeably.

[0590] In some embodiments, the communication device 8100 may include one or more interface circuits 8104. Optionally, the interface circuit 8104 is connected to the memory 8102. The interface circuit 8104 may be configured to receive signals from the memory 8102 or other devices, and may be configured to send signals to the memory 8102 or other devices. For example, the interface circuit 8104 may read instructions stored in the memory 8102 and send the instructions to the processor 8101.

[0591] The communication device 8100 described in the above embodiment may be a first terminal or a network device, but the scope of the communication device 8100 described in the present disclosure is not limited thereto, and the structure of the communication device 8100 may not be limited by FIG. 8A. 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 or 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, an in-vehicle device, a network device, a cloud device, an artificial intelligence device, etc.; (6) others, etc.

[0592] FIG8B is a schematic diagram of the structure of a chip 8200 according to an embodiment of the present disclosure. If the communication device 8100 can be a chip or a chip system, please refer to the schematic diagram of the structure of the chip 8200 shown in FIG8B , but the present disclosure is not limited thereto.

[0593] The chip 8200 includes one or more processors 8201 , and the chip 8200 is configured to execute any of the above methods.

[0594] In some embodiments, the chip 8200 further includes one or more interface circuits 8202. Optionally, the interface circuit 8202 is connected to the memory 8203. The interface circuit 8202 can be used to receive signals from the memory 8203 or other devices, and can be used to send signals to the memory 8203 or other devices. For example, the interface circuit 8202 can read instructions stored in the memory 8203 and send the instructions to the processor 8201.

[0595] In some embodiments, the interface circuit 8202 executes at least one of the communication steps such as sending and / or receiving in the above method (for example, step S3101, step S3107, step S3108, step S3201, step S3102, but not limited to these), and the processor 8201 executes at least one of the other steps (for example, step S3104, step S3105, step S3106, step S3202, step S3203, step S3103, but not limited to these).

[0596] In some embodiments, terms such as interface circuit, interface, transceiver pin, and transceiver may be used interchangeably.

[0597] In some embodiments, the chip 8200 further includes one or more memories 8203 for storing instructions. Alternatively, all or part of the memories 8203 may be outside the chip 8200.

[0598] The present disclosure also proposes a storage medium having instructions stored thereon, which, when executed on the communication device 8100, causes the communication device 8100 to execute 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 thereto, and may also be a storage medium readable by other devices. Optionally, the storage medium may be a non-transitory storage medium, but is not limited thereto, and may also be a temporary storage medium.

[0599] The present disclosure also provides a program product, which, when executed by the communication device 8100, enables the communication device 8100 to perform any of the above methods. Optionally, the program product is a computer program product.

[0600] The present disclosure also proposes a computer program, which, when executed on a computer, causes the computer to perform any one of the above methods.

[0601] In the above embodiments, all or part of the embodiments can be implemented by software, hardware, firmware or any combination thereof. When implemented using software, all or part of the embodiments can be implemented in the form of a computer program product. The computer program product includes one or more computer programs. When the computer program is loaded and executed on a computer, all or part of the processes or functions described in the embodiments of the present disclosure are generated. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer program can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer program can be transmitted from one website, computer, server or data center to another website, computer, server or data center via a wired (e.g., coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) method. The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device such as a server or data center that includes one or more available media integrated therein. The available medium may be a magnetic medium (eg, a floppy disk, a hard disk, a magnetic tape), an optical medium (eg, a high-density digital video disc (DVD)), or a semiconductor medium (eg, a solid state disk (SSD)).

[0602] Those skilled in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professionals and technicians can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this disclosure.

[0603] Those skilled in the art will clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0604] The above description is merely a specific embodiment of the present disclosure, but the scope of protection of the present disclosure is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this disclosure should be included in the scope of protection of the present disclosure. Therefore, the scope of protection of the present disclosure should be based on the scope of protection of the claims.

Claims

1. A sidelink SL communication method, characterized in that: include: The first terminal determines that the number of continuous discontinuous transmissions DTX of the first carrier based on hybrid automatic repeat request HARQ feedback meets the first condition; wherein the first carrier is one or more carriers supported by the first unicast connection between the first terminal and the second terminal; the second terminal is any terminal having a unicast connection with the first terminal; Obtaining first information; The first terminal determines, according to the first information, whether to restore the first carrier.

2. The method according to claim 1, characterized in that The first information includes a timer configured by a network device; and the first terminal determines, according to the first information, whether to restore the first carrier, including: Determine, according to the first information, a timer associated with the first carrier; Starting a timer associated with the first carrier; It is determined that the timer associated with the first carrier times out, and the first terminal determines to restore the first carrier, or it is determined that during the timer associated with the first carrier is running, the first terminal determines not to restore the first carrier.

3. The method according to claim 2, characterized in that The timer is configured according to a specified granularity, where the specified granularity is any one of the following: Carrier granularity; Bandwidth part BWP granularity; Terminal granularity.

4. The method according to claim 1, characterized in that The first information includes measurement configuration information; and the first terminal determining whether to restore the first carrier according to the first information includes: Perform measurement according to the measurement configuration information to determine a measurement result associated with the first carrier; According to the measurement result, the first terminal determines whether to restore the first carrier.

5. The method according to claim 4, characterized in that The determining, by the first terminal, whether to restore the first carrier according to the measurement result includes at least one of the following: Determining that the measurement result is less than or equal to a preset threshold, the first terminal determines to restore the first carrier; It is determined that the measurement result is greater than or equal to a preset threshold, and the first terminal determines not to restore the first carrier.

6. The method according to claim 2 or 5, characterized in that The first terminal determines to resume the first carrier, including: Determine to resume using resources on the first carrier to receive and / or send SL data.

7. The method according to claim 2 or 5, characterized in that The first terminal determines not to restore the first carrier, including: Determine that the first terminal selects a first resource to receive and / or send SL data during resource selection and / or reselection, wherein the first resource is a resource not on the first carrier.

8. The method according to claim 4 or 5, characterized in that The measurement configuration information includes at least one of the following: Received signal strength indication RSSI measurement configuration; Reference signal received power RSRP measurement configuration; Channel occupancy CO measurement configuration; Channel busy rate CBR measurement configuration.

9. The method according to claim 8, characterized in that The measurement configuration information includes at least one of the following: RSSI measurement configuration; RSRP measurement configuration; CO measurement configuration; and performing measurement according to the measurement configuration information to determine the measurement result associated with the first carrier includes: Perform measurement on the first carrier according to the measurement configuration information to determine a measurement result associated with the first carrier.

10. The method according to claim 9, characterized in that The measurement configuration information includes the CBR measurement configuration; and the measuring according to the measurement configuration information to determine the measurement result associated with the first carrier includes: Performing a CBR measurement on the first resource pool of the first carrier according to the CBR measurement configuration, and determining a CBR measurement result of the first resource pool on the first carrier; The CBR measurement result of the first resource pool is determined as the CBR measurement result associated with the first carrier.

11. The method according to claim 10, characterized in that The first resource pool is a first resource pool selected by the first terminal on the first carrier.

12. The method according to claim 6, characterized in that The method further comprises at least one of the following: Obtaining the preset threshold through network device configuration or pre-configuration; The preset threshold is determined based on the first terminal implementation.

13. The method according to claim 1, characterized in that The determining that the number of continuous discontinuous transmissions DTX of the first carrier based on hybrid automatic repeat request HARQ feedback meets the first condition includes: Obtaining a first threshold value; For the first unicast connection, determine that the number of consecutive DTXs of the first carrier based on HARQ feedback is greater than or equal to the first threshold; Determine whether the number of consecutive DTXs of the first carrier based on HARQ feedback satisfies the first condition.

14. The method according to claim 1 or 13, characterized in that The determining the number of consecutive DTXs of the first carrier based on HARQ feedback includes: For the first unicast connection, determining whether the first terminal receives hybrid automatic repeat request HARQ feedback information at a PSFCH reception timing associated with a PSSCH transmission on the first carrier; For the first unicast connection, it is determined that the first terminal has not received HARQ feedback information at a PSFCH reception timing associated with a PSSCH transmission on the first carrier, and a number of consecutive DTXs of the first carrier based on HARQ feedback is updated.

15. The method according to claim 14, characterized in that The determining and updating the number of consecutive DTXs of the first carrier based on HARQ feedback includes: Determine the number of consecutive DTXs of the first carrier based on HARQ feedback plus 1.

16. The method according to claim 14, characterized in that The method further comprises: For the first unicast connection, it is determined that the first terminal receives HARQ feedback information at a PSFCH reception timing associated with a PSSCH transmission on the first carrier, and it is determined that the number of consecutive DTXs of the first carrier based on the HARQ feedback is reset to 0.

17. The method according to claim 7, characterized in that The SL data includes at least one of the following: Physical sidelink shared channel PSSCH; Physical sidelink control channel PSCCH; Physical sidelink feedback channel PSFCH; Synchronization signal block SSB.

18. The method according to any one of claims 1 to 17, characterized in that The allocation mode of the sidelink transmission resource of the first terminal is autonomous selection of the sidelink transmission resource or scheduling of the transmission resource by a network device, wherein: The first terminal is in any state: Radio Resource Control RRC connected state; RRC idle state; RRC inactive state; Out of coverage status.

19. A sidelink SL communication method, characterized in that: include: The network device sends first information to the first terminal; The first information is used to instruct the first terminal to determine whether to restore the first carrier when the number of continuous discontinuous transmission DTX of the first carrier based on hybrid automatic repeat request HARQ feedback meets a first condition, wherein the first carrier is one or more carriers supported by the first unicast connection between the first terminal and the second terminal.

20. The method of claim 19, wherein: The first information includes a timer, and the timer is used to indicate whether the first terminal recovers the first carrier.

21. The method of claim 20, wherein: The timer is configured according to a specified granularity, where the specified granularity is any one of the following: Carrier granularity; Bandwidth part BWP granularity; Terminal granularity.

22. The method of claim 19, wherein: The first information includes measurement configuration information, where the measurement configuration information is used by the first terminal to perform measurement and determine a measurement result associated with the first carrier, where the measurement result is used to instruct the first terminal to determine whether to restore the first carrier.

23. The method of claim 20, wherein: The measurement configuration information includes at least one of the following: Received signal strength indication RSSI measurement configuration; Reference signal received power RSRP measurement configuration; Channel occupancy CO measurement configuration; Channel busy rate CBR measurement configuration.

24. The method according to claim 22 or 23, characterized in that The method further comprises: A preset threshold is sent to the first terminal; wherein the preset threshold is used by the first terminal to determine whether to restore the first carrier according to the measurement result.

25. The method of claim 19, wherein: The method further comprises: A first threshold is sent to the first terminal; wherein the first threshold is used by the first terminal to determine whether the number of consecutive DTXs of the first carrier based on requesting HARQ feedback meets a first condition.

26. A communication system, characterized in that: include: A first terminal, configured to perform a sidelink SL communication method as described in any one of claims 1 to 18; A network device configured to execute the sidelink (SL) communication method as described in any one of claims 19-25.

27. A first communication device, characterized in that: include: A processing module, configured to determine whether the number of continuous discontinuous transmissions DTX of a first carrier based on hybrid automatic repeat request HARQ feedback satisfies a first condition; wherein the first carrier is one or more carriers supported by a first unicast connection between the first communication device and a second terminal; and the second terminal is any terminal having a unicast connection with the first communication device; The processing module is further used to obtain first information; The processing module is further configured to determine whether the first communication device recovers the first carrier according to the first information.

28. A second communication device, characterized in that: include: A transceiver module, used for sending first information to a first terminal; The first information is used to instruct the first terminal to determine whether to restore the first carrier when the number of continuous discontinuous transmission DTX of the first carrier based on hybrid automatic repeat request HARQ feedback meets a first condition, wherein the first carrier is one or more carriers supported by the first unicast connection between the first terminal and the second terminal.

29. A communication device, characterized in that: include: one or more processors; The processor is used to call instructions so that the communication device executes the side link SL communication method described in any one of claims 1-18 and 19-25.

30. A storage medium storing instructions, characterized in that: When the instruction is executed on the communication device, the communication device executes the sidelink SL communication method described in any one of claims 1-18 and 19-25.

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