A method and device for sharing channel occupancy time

Abstract

The embodiment of the present disclosure discloses a method and device for sharing channel occupancy time, which can be applied to the unlicensed frequency band of terminal direct communication, and the method includes: sending first shared COT information to a second terminal device; the first terminal device is a terminal device that initiates COT, and the second terminal device is a terminal device that shares the COT. Thus, COT can be shared between terminal devices to improve frequency band utilization and meet communication service needs.

Description

Technical Field

[0001] The present disclosure relates to the field of communication technology, and in particular to a method and a device for sharing channel occupancy time (COT). Background Art

[0002] With the continuous emergence of new communication services and application requirements, terminal direct connection (Sidelink, SL, also called side link) communication has higher and higher requirements on transmission bandwidth, communication rate, communication delay, reliability, scalability and other performance. Limited authorized spectrum alone cannot meet the diverse application scenarios and requirements in the future. Therefore, the research on terminal equipment Sidelink communication technology on unlicensed spectrum is very urgent. Summary of the invention

[0003] The embodiments of the present disclosure provide a method and apparatus for sharing channel occupancy time, which can be applied to Sidelink communication between multiple terminal devices. By carrying shared COT information during Sidelink communication, shared COT of unlicensed frequency bands can be implemented, thereby improving frequency band utilization and meeting communication service requirements.

[0004] In a first aspect, an embodiment of the present disclosure provides a method for sharing channel occupancy time, which is applied to an unlicensed frequency band for terminal direct communication. The method is executed by a first terminal device, and the method includes: sending first shared COT information to a second terminal device; wherein the first terminal device is a terminal device that initiates the COT, and the second terminal device is a terminal device that shares the COT.

[0005] In this technical solution, by sending the first shared COT information to the second terminal device, the second terminal device can share the channel occupancy time COT in the unlicensed spectrum with the first terminal device, thereby improving the frequency band utilization and meeting the communication service needs.

[0006] In one implementation, the first shared COT information includes at least one of the following: a first COT remaining length; a COT ID; and a channel access method.

[0007] In an optional implementation, the method also includes: determining the total length of the shared COT; determining the first number of time slots and the second number of time slots; determining the remaining length of the first COT based on the total length of the shared COT; wherein the first number of time slots is the number of time slots occupied by the first terminal device for data transmission; and the second number of time slots is the number of time slots occupied by the second terminal device for data transmission.

[0008] Optionally, determining the remaining length of the first COT based on the total length of the COT includes: determining a terminal device processing time, the terminal device processing time being the time required for the terminal device to decode direct control information SCI and prepare data packets; determining the remaining length of the first COT based on the total length of the shared COT, the number of time slot offsets and the terminal device processing time; wherein the number of first time slots is M, the number of second time slots is 1, M is a positive integer greater than 1, and the time slot offset number is the number of time slots between the time slots carrying the first shared COT information and the COT start time slot.

[0009] Optionally, determining the remaining length of the first COT based on the total length of the shared COT includes: determining a terminal device processing time; determining the remaining length of the first COT based on the total length of the shared COT and the first number of time slots; wherein the first number of time slots and the second number of time slots are N, N is a positive integer greater than 1, and the first number of time slots is greater than or equal to the terminal device processing time.

[0010] Optionally, determining the remaining length of the first COT based on the total length of the COT includes: determining the remaining length of the first COT based on the total length of the shared COT and the first number of time slots; wherein the first number of time slots and the second number of time slots are 1.

[0011] In this technical solution, the remaining length of the first COT can be determined based on the total length of the shared COT, the number of first time slots, the number of second time slots and the number of time slot offsets, and sent to the second terminal device, so that the second terminal device can share the COT, improve frequency band utilization, and meet communication service needs.

[0012] In one implementation, the sending of the first shared COT information to the second terminal device includes: sending a first-stage SCI to the second terminal device via PSCCH, the first-stage SCI including the first shared COT information; or sending a second-stage SCI to the second terminal device via PSSCH, the second-stage SCI including the first shared COT information; or sending the first shared COT information to the second terminal device via symbols other than PSCCH; or sending the first shared COT information to the second terminal device via symbols other than PSSCH; or sending the first shared COT information to the second terminal device via a media access control MAC control unit CE.

[0013] In this technical solution, by sending the first shared COT information to the second terminal device, the second terminal device can share the COT with the first terminal device, so that the terminal device can obtain a longer communication time, improve the frequency band utilization, and meet the communication service needs.

[0014] In a second aspect, an embodiment of the present disclosure provides a method for sharing channel occupancy time, which is applied to an unlicensed frequency band for terminal direct communication. The method is executed by a second terminal device, and the method includes: receiving first shared COT information; determining second shared COT information; sending the second shared COT information to a third terminal device; the second terminal device is a terminal device that shares the COT, and the third terminal device is another terminal device that shares the COT.

[0015] In one implementation, the second shared COT information includes at least one of the following: a second COT remaining length; a COT ID; and a channel access method.

[0016] In an optional implementation, the method further includes: determining a first COT remaining length; determining a second number of time slots; and determining the second COT remaining length based on the first COT remaining length.

[0017] Optionally, determining the second COT remaining length based on the first COT remaining length includes: determining the second COT remaining length based on the first COT remaining length and terminal device processing time, wherein the second number of time slots is 1, and the terminal device processing time is the time required for the terminal device to decode Sidelink control information SCI and prepare data packets.

[0018] Optionally, determining the second COT remaining length based on the first COT remaining length includes: determining the second COT remaining length based on the first COT remaining length and the second number of time slots; wherein the second number of time slots is N, and N is a positive integer greater than 1.

[0019] In one implementation, sending the second shared COT information to the third terminal device includes: sending the first-stage SCI to the third terminal device via PSCCH, the first-stage SCI including the second shared COT information; or sending the second-stage SCI to the third terminal device via PSSCH, the second-stage SCI including the second shared COT information; or sending the second shared COT information to the third terminal device via symbols other than PSCCH; or sending the second shared COT information to the third terminal device via symbols other than PSSCH; or sending the second shared COT information to the third terminal device via MAC CE.

[0020] In a third aspect, an embodiment of the present disclosure provides a device for sharing channel occupancy time, which is applied to an unlicensed frequency band for terminal direct communication. The device includes: a transceiver module for sending first shared COT information to a second terminal device; wherein the first terminal device is a terminal device that initiates COT, and the second terminal device is a terminal device that shares the COT.

[0021] In one implementation, the first shared COT information includes at least one of the following: a first COT remaining length; a COT ID; and a channel access method.

[0022] In one implementation, the device also includes: a processing module, used to determine the total length of the shared COT; determine the first number of time slots and the second number of time slots; determine the remaining length of the first COT based on the total length of the shared COT; wherein the first number of time slots is the number of time slots occupied by the first terminal device for data transmission; and the second number of time slots is the number of time slots occupied by the second terminal device for data transmission.

[0023] In an optional implementation, the processing module is specifically used to: determine the terminal device processing time, the terminal device processing time is the time required for the terminal device to decode the Sidelink control information SCI and prepare the data packet; determine the remaining length of the first COT according to the total length of the COT, the time slot offset number and the terminal device processing time; wherein the number of the first time slots is M, M is a positive integer greater than 1, the number of the second time slots is 1, and the time slot offset number is the number of time slots between the time slot with the first shared COT information and the COT start time slot.

[0024] In an optional implementation, the processing module is specifically used to: determine the processing time of the terminal device; determine the remaining length of the first COT based on the total length of the shared COT and the first number of time slots; wherein the first number of time slots and the second number of time slots are N, N is a positive integer greater than 1, the first number of time slots is greater than or equal to the terminal device processing time, and the terminal device processing time is the time required for the terminal device to decode the direct connection control information SCI and prepare the data packet.

[0025] In an optional implementation, the processing module is specifically used to: determine the remaining length of the first COT according to the total length of the shared COT and the first number of time slots; wherein the first number of time slots and the second number of time slots are 1.

[0026] In one implementation, the transceiver module is specifically used to: send the first-stage SCI to the second terminal device through PSCCH, the first-stage SCI including the first shared COT information; or send the second-stage SCI to the second terminal device through PSSCH, the second-stage SCI including the first shared COT information; or send the first shared COT information to the second terminal device through symbols other than PSCCH; or send the first shared COT information to the second terminal device through symbols other than PSSCH; or send the first shared COT information to the second terminal device through MAC CE.

[0027] In a fourth aspect, an embodiment of the present disclosure provides a device for sharing channel occupancy time, which is applied to an unlicensed frequency band for terminal direct communication, and the device includes: a transceiver module, which is used to receive first shared COT information; and send the second shared COT information to a third terminal device; wherein the third terminal device is another terminal device that shares the COT. A processing module is used to determine the second shared COT information.

[0028] In one implementation, the second shared COT information includes at least one of the following: a second COT remaining length; a COT ID; and a channel access method.

[0029] In an optional implementation, the processing module is specifically used to: obtain a first COT remaining length; determine a second number of time slots; and determine the second COT remaining length according to the first COT remaining length.

[0030] Optionally, the processing module is specifically used to: determine the second COT remaining length based on the first COT remaining length and the terminal device processing time; wherein the second number of time slots is 1, and the terminal device processing time is the time required for the terminal device to decode the Sidelink control information SCI and prepare the data packet.

[0031] Optionally, the processing module is specifically used to: determine the second COT remaining length according to the first COT remaining length and the second number of time slots; wherein the second number of time slots is N, and N is a positive integer greater than 1.

[0032] In one implementation, the transceiver module is specifically used to: send the first-stage SCI to the third terminal device through PSCCH, the first-stage SCI including the second shared COT information; or send the second-stage SCI to the third terminal device through PSSCH, the second-stage SCI including the second shared COT information; or send the second shared COT information to the third terminal device through symbols other than PSCCH; or send the second shared COT information to the third terminal device through symbols other than PSSCH; or send the second shared COT information to the third terminal device through MAC CE.

[0033] In a fifth aspect, an embodiment of the present disclosure provides a terminal device, including a processor and a memory, wherein the memory stores a computer program, and the processor executes the computer program stored in the memory so that the terminal device executes the method described in the first aspect above.

[0034] In a sixth aspect, an embodiment of the present disclosure provides a terminal device, including a processor and a memory, wherein the memory stores a computer program, and the processor executes the computer program stored in the memory so that the terminal device executes the method described in the second aspect above.

[0035] In a seventh aspect, an embodiment of the present disclosure provides a computer-readable storage medium for storing instructions, which, when executed, causes the first terminal device to execute the method described in the first aspect.

[0036] In an eighth aspect, an embodiment of the present disclosure provides a computer-readable storage medium for storing instructions, which, when executed, causes the second terminal device to execute the method described in the second aspect. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the technical solution of the embodiments of the present disclosure, the drawings required to be used in the embodiments of the present disclosure will be described below.

[0038] Figure 1 is a schematic diagram of the architecture of a communication system provided by an embodiment of the present disclosure;

[0039] Figure 2 is a flow chart of a method for sharing channel occupancy time provided by an embodiment of the present disclosure;

[0040] Figure 3 is a flow chart of another method for sharing channel occupancy time provided by an embodiment of the present disclosure;

[0041] Figure 4 is an example diagram of a method for sharing channel occupancy time provided by an embodiment of the present disclosure;

[0042] Figure 5 is an example diagram of another method for sharing channel occupancy time provided by an embodiment of the present disclosure;

[0043] Figure 6 is an example diagram of another method for sharing channel occupancy time provided by an embodiment of the present disclosure;

[0044] Figure 7 is a flowchart of another method for sharing channel occupancy time provided by an embodiment of the present disclosure;

[0045] Figure 8 It is a structural diagram of a shared channel occupancy time device provided by an embodiment of the present disclosure;

[0046] Fig. 9 is a structural diagram of another device for sharing channel occupancy time provided by an embodiment of the present disclosure;

[0047] Fig.10 It is a schematic diagram of the structure of a terminal device provided in an embodiment of the present disclosure. DETAILED DESCRIPTION

[0048] The embodiments of the present disclosure are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present disclosure, and should not be construed as limitations on the present disclosure. In the description of the present disclosure, unless otherwise specified, " / " means or, for example, A / B can mean A or B; "and / or" in this article is merely a description of the association relationship of associated objects, indicating that three relationships may exist, for example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone.

[0049] In order to better understand a method for sharing channel occupancy time disclosed in an embodiment of the present disclosure, a communication system to which the embodiment of the present disclosure is applicable is first described below.

[0050] See also Figure 1 , Figure 1 A schematic diagram of a communication system architecture provided by an embodiment of the present disclosure. The communication system may include but is not limited to three terminal devices, wherein the terminal devices communicate with each other via Sidelink. Figure 1 The number and form of devices shown are for illustrative purposes only and do not constitute a limitation on the embodiments of the present disclosure. Figure 1 The communication system shown takes a first terminal device 101 , a second terminal device 102 and a third terminal device 103 as an example.

[0051] The first terminal device 101, the second terminal device 102 and the third terminal device 103 in the embodiment of the present disclosure can be an entity for receiving or transmitting signals, such as a mobile phone. The terminal device can also be called a terminal device (terminal), a user equipment (UE), a mobile station (MS), a mobile terminal device (MT), etc. The terminal device can be a car with communication function, a smart car, a mobile phone, a wearable device, a tablet computer (Pad), a computer with wireless transceiver function, a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, a wireless terminal device in industrial control (industrial control), a wireless terminal device in self-driving, a wireless terminal device in remote medical surgery, a wireless terminal device in smart grid (smart grid), a wireless terminal device in transportation safety (transportation safety), a wireless terminal device in a smart city (smart city), a wireless terminal device in a smart home (smart home), etc. The embodiments of the present disclosure do not limit the specific technology and specific device form adopted by the terminal device.

[0052] 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 provided by the embodiment of the present disclosure. A person skilled in the art can know that with the evolution of the system architecture and the emergence of new business scenarios, the technical solution provided by the embodiment of the present disclosure is also applicable to similar technical problems.

[0053] The method and device for sharing channel occupancy time provided by the present disclosure are described in detail below with reference to the accompanying drawings.

[0054] See also Figure 2 , Figure 2 is a flow chart of a method for sharing channel occupancy time provided by an embodiment of the present disclosure. It should be noted that the method for sharing channel occupancy time in an embodiment of the present disclosure can be applied to a first terminal device, which is a terminal device that initiates COT. Figure 2 As shown, the method for sharing channel occupancy time may include but is not limited to the following steps.

[0055] Step S201: Send first shared COT information to a second terminal device.

[0056] In the embodiment of the present disclosure, the second terminal device may be a terminal device that shares a COT.

[0057] In one implementation, the first shared COT information includes at least one of the following: a first COT remaining length; a COTID; and a channel access method.

[0058] For example, the first terminal device can use Type 1 LBT (Listen Before Talk) method to access the channel, initiate a COT (channel occupancy time) of a certain length, determine the remaining length of the first COT according to the specific situation, and carry shared COT information including the remaining length of the first COT, COT ID, and at least one of the channel access methods when conducting Sidelink communication with the second terminal device.

[0059] In the embodiment of the present disclosure, the remaining length of the first COT may be understood as the length of the COT available for use by the second terminal device, which may be determined by the first terminal device based on different situations.

[0060] In some embodiments of the present disclosure, the first COT residual length may be represented by bit length.

[0061] For example, assuming that the remaining length of the first COT is 3 slots, "0011" can be used to represent it.

[0062] Among them, in the embodiment of the present disclosure, the COT ID is an ID (Identifier) ​​representing the COT for sharing, which is used to distinguish different channel occupancy time COTs shared between terminal devices, and the COT ID is the same in the shared information generated by all terminal devices sharing the same COT.

[0063] Among them, in the embodiment of the present disclosure, the channel access method is used to indicate the second terminal device that receives the first shared COT information, and the specific channel access method used, for example, the channel access method can be Type 2A or Type 2B or Type 2C.

[0064] By implementing the embodiments of the present disclosure, the first shared COT information can be sent to the second terminal device so that the second terminal device can share the COT with the first terminal device, thereby enabling the terminal device to obtain a longer communication time, improve frequency band utilization, and meet communication service needs.

[0065] See also Figure 3 , Figure 3is a flow chart of another method for sharing channel occupancy time provided by an embodiment of the present disclosure. By this method, the remaining length of the first COT can be determined according to the total length of the shared COT. Figure 3 As shown, the method for sharing channel occupancy time may include but is not limited to the following steps.

[0066] Step S301, determining the total length of the shared COT.

[0067] Step S302, determining the first time slot number and the second time slot number.

[0068] Step S303: determine the remaining length of the first COT according to the total length of the shared COT.

[0069] Among them, in the embodiment of the present disclosure, the first time slot number can be understood as the number of time slots occupied by the first terminal device for data transmission; the second time slot number can be understood as the number of time slots occupied by the second terminal device for data transmission; the time slot offset number can be understood as the number of time slots between the time slot with the first shared COT information and the COT starting time slot.

[0070] In one implementation, the above-mentioned implementation of determining the remaining length of the first COT based on the total length of the shared COT can be implemented in the following manner: determining the terminal device processing time, and determining the remaining length of the first COT based on the total length of the shared COT, the number of time slot offsets, and the terminal device processing time. The number of first time slots is M, the number of second time slots is 1, M is a positive integer greater than 1, the number of time slot offsets is the number of time slots between the time slot with the first shared COT information and the COT start time slot; the terminal device processing time is the time required for the terminal device to decode the direct connection control information SCI and prepare the data packet.

[0071] Optionally, considering the impact of terminal device processing time on the shared COT, when the number of first time slots is M, M is a positive integer greater than 1, and the number of second time slots is 1, the remaining length of the first COT contained in the first shared COT information carried in each time slot can be determined by the following formula.

[0072] T1=TKt Formula 1

[0073] Among them, T1 represents the remaining length of the first COT, T represents the total length of COT, K represents the number of time slot offsets, and t represents the processing time of the terminal device, that is, the time required for the terminal device to decode SCI (Sidelink Control Information) and prepare data packets. The terminal device processing time can be set by the terminal device according to its own conditions, or uniformly pre-configured through the system, wherein the processing time of multiple terminal devices sharing the same COT is the same or the processing time of all terminal devices is the same.

[0074] For example, see Figure 4 , Figure 4 An example diagram of a method for sharing channel occupancy time provided by an embodiment of the present disclosure. The total length T of the shared channel occupancy time COT is 10 slots, the first time slot number M is equal to the terminal device processing time t, which is 3 slots, slot1 is the starting slot of the shared COT, and slot1 is slot2 after 1 slot, that is, the time slot offset number K of slot2 relative to slot1 is 1 slot. The first shared COT information carried in slot2 contains the remaining length of the first COT:

[0075] T1=TKt=10-1-3=6

[0076] That is, the remaining length of the first COT included in the first shared COT information carried in slot2 is 6 slots.

[0077] In one implementation, the above-mentioned method of determining the remaining length of the first COT based on the total length of the shared COT can be implemented in the following manner: determine the terminal device processing time; determine the remaining length of the first COT based on the total length of the shared COT and the first number of time slots; wherein the first number of time slots and the second number of time slots are N, N is a positive integer greater than 1, and the first number of time slots is greater than or equal to the terminal device processing time.

[0078] Optionally, considering the impact of the terminal device processing time on the shared COT, and the number of the first time slots and the number of the second time slots are N, N is a positive integer greater than 1, the number of the first time slots is greater than or equal to the terminal device processing time, and the first shared COT information carried in each slot contains the same first COT remaining length, the following formula can be used to determine the first COT remaining length.

[0079] T1=TN Formula 2

[0080] Wherein, T1 represents the remaining time of the first COT, T represents the total length of the COT, and N is the number of first time slots.

[0081] For example, see Figure 5 , Figure 5 An example diagram of another method for sharing channel occupation time provided by an embodiment of the present disclosure. The total length T of the shared channel occupation time COT is 10 slots, the number of first time slots and the number of second time slots are 3, and the first COT remaining length contained in the first shared COT information carried by the first terminal device in the occupied slots 1, 2 and 3 is:

[0082] T1=TN=10-3=7

[0083] That is, the remaining length of the first COT contained in the first shared COT information carried by slot1, slot2 and slot3 is 7 slots.

[0084] In one implementation, the above-mentioned method of determining the remaining length of the first COT based on the total length of the shared COT can be implemented as follows: determine the remaining length of the first COT based on the total length of the shared COT and the first number of time slots; wherein the first number of time slots and the second number of time slots are 1.

[0085] Optionally, without considering the impact of the terminal device processing time on the shared COT, when the first number of time slots and the second number of time slots are both 1, the following formula can be used to determine the first remaining shared COT time.

[0086] T1=T-1 Formula 3

[0087] Wherein, T1 represents the remaining time of the first COT, T represents the total length of the COT, and 1 represents one slot occupied by the first terminal device.

[0088] For example, see Figure 6 , Figure 6 This is another example diagram of a method for sharing channel occupation time provided by an embodiment of the present disclosure. Assuming that the total length T of the shared channel occupation time COT is 10 slots, the first shared COT information sent by the first terminal device to the second terminal device includes the remaining length of the first COT:

[0089] T1=T-1=10-1=9

[0090] That is, the first shared COT information sent by the first terminal device to the second terminal device includes a first COT remaining length of 9 slots.

[0091] Step S304: Send the first shared COT information to the second terminal device.

[0092] In an optional implementation, the first shared COT information may be carried via Sidelink communication to send the first shared COT information to the second terminal device; or, the first shared COT information may be carried via MAC CE to send the first shared COT information to the second terminal device.

[0093] Optionally, the first-stage SCI may be sent to the second terminal device via a physical sidelink control channel PSCCH (Physical Sidelink Control Channel), and the first-stage SCI includes the first shared COT information.

[0094] Optionally, the second-stage SCI may be sent to the second terminal device via a physical sidelink shared channel PSSCH (Physical Sidelink Shared Channel), and the second-stage SCI includes the first shared COT information. For example, the first shared information may be indicated by a DMRS (Demodulation Reference Signal) sequence.

[0095] Optionally, the first shared COT information may be sent to the second terminal device via symbols other than the PSCCH.

[0096] Optionally, the first shared COT information may be sent to the second terminal device via symbols other than the PSSCH.

[0097] For example, a specific signal (such as a specific sequence) is transmitted in an AGC (Automatic Gain Control) symbol or a GP (Guard Period) symbol to indicate the first shared information.

[0098] Optionally, the first shared COT information may be indicated in an implicit manner through PSCCH or PSSCH.

[0099] Through the embodiments of the present disclosure, the remaining length of the first COT can be determined based on the total length of the shared COT, the number of first time slots, the number of second time slots and the number of time slot offsets, and sent to the second terminal device, so that the second terminal device can share the COT, improve frequency band utilization, and meet communication service needs.

[0100] See also Figure 7 , Figure 7 It is a flow chart of another method for sharing channel occupancy time provided by an embodiment of the present disclosure. It should be noted that the method for sharing channel occupancy time provided by an embodiment of the present disclosure is applied to a second terminal device, such as Figure 7 As shown, the method for sharing channel occupancy time may include but is not limited to the following steps:

[0101] Step S701, receiving first shared COT information.

[0102] The first shared COT information is generated and sent based on different situations by the first terminal device connected to the second terminal device through a terminal direct connection mode.

[0103] Step S702, determine the second shared COT information.

[0104] In one implementation, the second shared COT information includes at least one of the following: the second COT remaining length; COTID; and a channel access method.

[0105] Among them, the channel access mode is used to indicate the third terminal device that receives the second shared information, and the specific channel access mode used, such as Type 2A, Type 2B, or Type 2C.

[0106] In one implementation, the first COT remaining length may be acquired from the first shared COT information, and the second COT remaining length may be determined according to the first COT remaining length.

[0107] In an optional implementation, after determining the first COT remaining length, the second number of time slots is determined, and the second COT remaining length is determined based on the first COT remaining length, wherein the second number of time slots is the number of time slots occupied by the second terminal device for data transmission.

[0108] As an example of an implementation method, the above-mentioned implementation method of determining the remaining length of the second COT based on the remaining length of the first COT can be as follows: determine the remaining length of the second COT based on the remaining length of the first COT and the processing time of the terminal device; wherein, the number of second time slots is 1, and the processing time of the terminal device is the time required for the terminal device to decode the SCI and prepare the data packet.

[0109] For example, when the number of the second time slot is 1, that is, corresponding to the situation represented by formula 1, the following formula can be used to determine the remaining length of the second COT:

[0110] T2=T1-t Formula 4

[0111] Wherein, T2 represents the remaining time of the second COT, T1 represents the remaining time of the first COT, and t represents the processing time of the terminal device.

[0112] For example, see Figure 4 , Figure 4 This is an example diagram of a method for sharing channel occupancy time provided by an embodiment of the present disclosure. Figure 4 As shown, from formula 1, it can be concluded that the first COT remaining time length T1 in the first shared COT information carried by slot 1 is 7 slots. In slot 4, the second terminal device obtains the first COT remaining time length T1 of slot 1 after 3 slots of processing time. Then, the second COT remaining length contained in the second shared COT information carried by the second terminal device in slot 4 is:

[0113] T2=T1-t=7-3=4

[0114] That is, the second shared COT information carried by the second terminal device in slot 4 includes a second COT remaining length of 4 slots.

[0115] The method for determining the remaining length of the first COT in the embodiment of the present disclosure is only an example, and the embodiment of the present disclosure does not limit this and will not be repeated.

[0116] In an optional implementation, the above-mentioned method of determining the second COT remaining length based on the first COT remaining length can be as follows: determine the second COT remaining length based on the first COT remaining length and the second number of time slots; wherein the second number of time slots is N, and N is a positive integer greater than 1.

[0117] For example, when the number of second time slots is N, and N is a positive integer greater than 1, that is, the situation represented by formula 2, the remaining length of the second COT included in the second shared COT information can be determined by the following formula:

[0118] T2=T1-N Formula 5

[0119] Wherein, T2 represents the remaining time of the second COT, and N represents the number of second time slots.

[0120] For example, see Figure 5 , Figure 5 This is an example diagram of another method for sharing channel occupancy time provided by an embodiment of the present disclosure. Figure 5 As shown, the number of first time slots and the number of second time slots are 3 slots. Formula 2 shows that the remaining time length T1 of the first COT is 7 slots. Then, the remaining length of the second COT contained in the second shared COT information carried by the second terminal device in the occupied slots 4, 5 and 6 is:

[0121] T2=T1-N=7-3=4

[0122] That is, the remaining length of the second COT included in the shared COT information carried by the second terminal device in the occupied slots 4, 5, and 6 is 4 slots.

[0123] The method for determining the remaining length of the first COT in the embodiment of the present disclosure is only an example, and the embodiment of the present disclosure does not limit this and will not be repeated. In one implementation, if the remaining length of the first COT obtained by the second terminal device is 0, the COT sharing is stopped.

[0124] Step S703: Send the second shared COT information to the third terminal device.

[0125] Among them, the third terminal device is a terminal device that shares COT, and can communicate with the second terminal device in a terminal direct connection manner, and the third terminal device can be the same terminal device as the first terminal device, that is, the second terminal device can transmit the second shared COT information back to the first terminal device.

[0126] For example, the second terminal device obtains the shared COT information by decoding the SCI, and obtains the remaining length of the first COT therefrom. If it is determined that the remaining length of the first COT is greater than 0, LBT is performed through the channel access method indicated in the first shared COT information. After LBT is successful, data carrying the second shared COT information is sent to the third terminal device; if it is determined that the remaining length of the first COT is greater than 0, COT sharing is stopped.

[0127] In an optional implementation, the second shared COT information may be carried via Sidelink communication to send the second shared COT information to the third terminal device; or, the second shared COT information may be carried via MAC CE to send the second shared COT information to the third terminal device.

[0128] Optionally, the first-stage SCI may be sent to the third terminal device via the PSCCH, where the first-stage SCI includes the second shared COT information.

[0129] Optionally, a second-stage SCI may be sent to a third terminal device via PSSCH, where the second-stage SCI includes second shared COT information.

[0130] For example, the first shared information may be indicated by a DMRS sequence.

[0131] Optionally, the second shared COT information may be sent to the second terminal device via symbols other than the PSCCH.

[0132] Optionally, the second shared COT information may be sent to the second terminal device via symbols other than the PSSCH.

[0133] For example, a specific signal (such as a specific sequence) is transmitted in an AGC (Automatic Gain Control) symbol or a GP (Guard Period) symbol to indicate the second shared information.

[0134] Optionally, the second shared COT information may be indicated in an implicit manner through PSCCH or PSSCH.

[0135] In the above embodiments provided by the present disclosure, the methods provided by the embodiments of the present disclosure are introduced from the perspectives of the first terminal device and the second terminal device, respectively. In order to implement the functions in the methods provided by the above embodiments of the present disclosure, the first terminal device and the second terminal device may include a hardware structure and a software module, and implement the above functions in the form of a hardware structure, a software module, or a hardware structure plus a software module. One of the above functions may be executed in the form of a hardware structure, a software module, or a hardware structure plus a software module.

[0136] See also Figure 8 , Figure 8 A schematic diagram of a shared channel occupancy time device 800 provided in an embodiment of the present disclosure. It should be noted that the shared channel occupancy time device 800 may be a first terminal device, or a device in the first terminal device, or a device that can be used in conjunction with the first terminal device.

[0137] Figure 8 The shared channel occupation time device 800 shown includes a transceiver module 801 .

[0138] In an embodiment of the present disclosure, the transceiver module 801 is used to send the first shared COT information to the second terminal device; wherein the second terminal device is a terminal device that shares the COT.

[0139] In one implementation, the first shared COT information sent by the transceiver module 801 to the second terminal device includes at least one of the following: the remaining length of the first COT; the COT ID; and the channel access method.

[0140] In one implementation, the apparatus 800 for sharing channel occupation time further includes a processing module 802 .

[0141] In an embodiment of the present disclosure, the processing module 802 is used to determine the total length of the shared COT; determine the first time slot number and the second time slot number; determine the remaining length of the first COT based on the total length of the shared COT; wherein the first time slot number is the number of time slots occupied by the first terminal device for data transmission; and the second time slot number is the number of time slots occupied by the second terminal device for data transmission.

[0142] In an optional implementation, the processing module 802 is specifically used to: determine the terminal device processing time, the terminal device processing time is the time required for the terminal device to decode the SCI and prepare the data packet; determine the remaining length of the first COT according to the total length of the shared COT, the number of time slot offsets and the terminal device processing time. The number of the first time slots is M, M is a positive integer greater than 1, the number of the second time slots is 1, and the time slot offset number is the number of time slots between the time slot with the first shared COT information and the COT start time slot.

[0143] In an optional implementation, the processing module 802 is specifically used to: determine the processing time of the terminal device; determine the remaining length of the first COT based on the total length of the shared COT and the first number of time slots; wherein the first number of time slots and the second number of time slots are N, N is a positive integer greater than 1, the first number of time slots is greater than or equal to the terminal device processing time, and the terminal device processing time is the time required for the terminal device to decode the direct connection control information SCI and prepare the data packet.

[0144] In an optional implementation, the processing module 802 is specifically used to: determine the remaining length of the first COT according to the total length of the shared COT and the first number of time slots; wherein the first number of time slots and the second number of time slots are both 1.

[0145] In an optional implementation, the transceiver module 801 is specifically used to: send the first-stage SCI to the second terminal device through PSCCH, the first-stage SCI including the first shared COT information; or send the second-stage SCI to the second terminal device through PSSCH, the second-stage SCI including the first shared COT information; or send the first shared COT information to the second terminal device through symbols other than PSCCH; or send the first shared COT information to the second terminal device through symbols other than PSSCH; or send the first shared COT information to the second terminal device through a media access control control unit.

[0146] See also Fig. 9 , Fig. 9 This is a schematic diagram of a shared channel occupancy time device 900 provided in an embodiment of the present disclosure. It should be noted that the shared channel occupancy time device 900 may be a second terminal device or a device in the second terminal device, or a device that can be used in conjunction with the second terminal device.

[0147] Fig. 9 The shared channel occupancy time device 900 shown includes a transceiver module 901 and a processing module 902 .

[0148] In the embodiment of the present disclosure, the transceiver module 901 is used to receive the first shared COT information and send the second shared COT information to the third terminal device, wherein the third terminal device is another terminal device of the shared COT. The processing module 902 is used to determine the second shared COT information.

[0149] In one implementation, the second shared COT information sent by the transceiver module 901 to the third terminal device includes at least one of the following: the remaining length of the second COT; the COT ID; and the channel access method.

[0150] In one implementation, the processing module 902 is specifically configured to determine a first COT remaining length; determine a second number of time slots; and determine a second COT remaining length according to the first COT remaining length.

[0151] In an optional implementation, the processing module 902 is specifically used to: determine the second COT remaining length according to the first COT remaining length and the terminal device processing time; wherein the second time slot number is 1, and the terminal device processing time is the time required for the terminal device to decode the Sidelink control information SCI and prepare the data packet.

[0152] In an optional implementation, the processing module 902 is specifically used to: determine the second COT remaining length according to the first COT remaining length and the second number of time slots; wherein the second number of time slots is N, and N is a positive integer greater than 1.

[0153] In an optional implementation, the transceiver module 901 is specifically used to: send the first-stage SCI to the third terminal device through PSCCH, the first-stage SCI including the second shared COT information; or send the second-stage SCI to the third terminal device through PSSCH, the second-stage SCI including the second shared COT information; or send the second shared COT information to the third terminal device through symbols other than PSCCH; or send the second shared COT information to the third terminal device through symbols other than PSSCH; or send the second shared COT information to the third terminal device through MAC CE.

[0154] See also Fig.10 , Fig.10 1 is a schematic diagram of the structure of the terminal device 1000 provided in an embodiment of the present disclosure. The terminal device 1000 may be a first terminal device or a second terminal device, or may be a chip, a chip system, or a processor that supports the terminal device to implement the above method. The terminal device may be used to implement the method described in the above method embodiment, and the details may refer to the description in the above method embodiment.

[0155] The terminal device 1000 may include one or more processors 1001. The processor 1001 may be a general-purpose processor or a dedicated processor, etc. For example, it may be a baseband processor or a central processing unit. The baseband processor may be used to process the communication protocol and communication data, and the central processing unit may be used to control the communication device (such as a base station, a baseband chip, a terminal device, a terminal device chip, a DU or a CU, etc.), execute a computer program, and process the data of the computer program.

[0156] Optionally, the terminal device 1000 may further include one or more memories 1002, on which a computer program 1004 may be stored, and the processor 1001 executes the computer program 1004 so that the terminal device 1000 performs the method described in the above method embodiment. Optionally, data may also be stored in the memory 1002. The terminal device 1000 and the memory 1002 may be provided separately or integrated together.

[0157] Optionally, the terminal device 1000 may further include a transceiver 1005 and an antenna 1006. The transceiver 1005 may be referred to as a transceiver unit, a transceiver, or a transceiver circuit, etc., for implementing a transceiver function. The transceiver 1005 may include a receiver and a transmitter, the receiver may be referred to as a receiver or a receiving circuit, etc., for implementing a receiving function; the transmitter may be referred to as a transmitter or a transmitting circuit, etc., for implementing a transmitting function.

[0158] Optionally, the terminal device 1000 may further include one or more interface circuits 1007. The interface circuit 1007 is used to receive code instructions and transmit them to the processor 1001. The processor 1001 runs the code instructions to enable the terminal device 1000 to execute the method described in the above method embodiment.

[0159] The terminal device 1000 is the first terminal device in the aforementioned method embodiment: the transceiver 1005 is used to execute Figure 2 Step S201 in the above; Execute Figure 3 The processor 1001 is used to execute step S303. Figure 3 Step S301 and step S302 in .

[0160] The terminal device 1000 is a second terminal device in the aforementioned method embodiment: the processor 1001 is configured to execute Figure 7 Step S702 in the above; transceiver 1005 is used to perform Figure 7 Step S701 and step S703 in .

[0161] In one implementation, the processor 1001 may include a transceiver for implementing receiving and sending functions. For example, the transceiver may be a transceiver circuit, an interface, or an interface circuit. The transceiver circuit, interface, or interface circuit for implementing the receiving and sending functions may be separate or integrated. The above-mentioned transceiver circuit, interface, or interface circuit may be used for reading and writing code / data, or the above-mentioned transceiver circuit, interface, or interface circuit may be used for transmitting or delivering signals.

[0162] In one implementation, the processor 1001 may store a computer program 1003, which runs on the processor 1001 and enables the terminal device 1000 to perform the method described in the above method embodiment. The computer program 1003 may be fixed in the processor 1001, in which case the processor 1001 may be implemented by hardware.

[0163] In one implementation, the terminal device 1000 may include a circuit that can implement the functions of sending, receiving or communicating in the aforementioned method embodiments. The processor and transceiver described in the present disclosure may be implemented in an integrated circuit (IC), an analog IC, a radio frequency integrated circuit RFIC, a mixed signal IC, an application specific integrated circuit (ASIC), a printed circuit board (PCB), an electronic device, etc. The processor and transceiver may also be manufactured using various IC process technologies, such as complementary metal oxide semiconductor (CMOS), N-type metal oxide semiconductor (nMetal-oxide-semiconductor, NMOS), P-type metal oxide semiconductor (positive channelmetal oxide semiconductor, PMOS), bipolar junction transistor (bipolar junction transistor, BJT), bipolar CMOS (BiCMOS), silicon germanium (SiGe), gallium arsenide (GaAs), etc.

[0164] The terminal device described in the above embodiments may be a network device or a terminal device, but the scope of the terminal device described in the present disclosure is not limited thereto, and the structure of the terminal device may not be limited thereto. Fig.10 The terminal device may be an independent device or may be part of a larger device. For example, the terminal device may be:

[0165] (1) Independent integrated circuit IC, or chip, or chip system or subsystem;

[0166] (2) having a set of one or more ICs, and optionally, the IC set may also include a storage component for storing data and computer programs;

[0167] (3) ASIC, such as modem;

[0168] (4) Modules that can be embedded in other devices;

[0169] (5) Receivers, terminal devices, intelligent terminal devices, cellular phones, wireless devices, handheld devices, mobile units, vehicle-mounted devices, network devices, cloud devices, artificial intelligence devices, etc.;

[0170] (6)Others

[0171] Those skilled in the art may also understand that the various illustrative logical blocks and steps listed in the embodiments of the present disclosure may be implemented by electronic hardware, computer software, or a combination of the two. Whether such functions are implemented by hardware or software depends on the specific application and the design requirements of the entire system. Those skilled in the art may use various methods to implement the functions described for each specific application, but such implementation should not be understood as exceeding the scope of protection of the embodiments of the present disclosure.

[0172] The embodiment of the present disclosure also provides a system for sharing channel occupancy time, the system comprising the aforementioned Figure 2 and Figure 3 In the embodiment, the shared channel occupancy time device of the first terminal device in the aforementioned method embodiment and the aforementioned Figure 7 In the embodiment, the shared channel occupancy time device is used as the second terminal device in the aforementioned method embodiment.

[0173] The present disclosure also provides a readable storage medium having instructions stored thereon, which implement the functions of any of the above method embodiments when executed by a computer.

[0174] The present disclosure also provides a computer program product, which implements the functions of any of the above method embodiments when executed by a computer.

[0175] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented by software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer programs. When the computer program is loaded and executed on a computer, the process or function described in the embodiment of the present disclosure is generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable 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 a website site, computer, server or data center by wired (e.g., coaxial cable, optical fiber, digital subscriber line (digital subscriber line, DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) mode to another website site, computer, server or data center. The computer-readable storage medium can be any available medium that a computer can access or a data storage device such as a server or data center that includes one or more available media integrated. 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)).

[0176] Those skilled in the art can understand that the various numerical numbers such as first and second involved in the present disclosure are only used for distinction for convenience of description and are not used to limit the scope of the embodiments of the present disclosure, and also indicate the order of precedence.

[0177] At least one in the present disclosure may also be described as one or more, and a plurality may be two, three, four or more, which is not limited in the present disclosure. In the embodiments of the present disclosure, for a technical feature, the technical features in the technical feature are distinguished by "first", "second", "third", "A", "B", "C" and "D", etc., and there is no order of precedence or size between the technical features described by the "first", "second", "third", "A", "B", "C" and "D".

[0178] The corresponding relationships shown in the tables in the present disclosure can be configured or predefined. The values ​​of the information in each table are only examples and can be configured as other values, which are not limited by the present disclosure. When configuring the corresponding relationship between the information and each parameter, it is not necessarily required to configure all the corresponding relationships illustrated in each table. For example, in the table in the present disclosure, the corresponding relationships shown in some rows may not be configured. For another example, appropriate deformation adjustments can be made based on the above table, such as splitting, merging, etc. The names of the parameters shown in the titles of the above tables can also use other names that can be understood by the communication device, and the values ​​or representations of the parameters can also be other values ​​or representations that can be understood by the communication device. When implementing the above tables, other data structures can also be used, such as arrays, queues, containers, stacks, linear lists, pointers, linked lists, trees, graphs, structures, classes, heaps, hash tables or hash tables.

[0179] The predefined in the present disclosure may be understood as defined, predefined, stored, pre-stored, pre-negotiated, pre-configured, solidified, or pre-burned.

[0180] Those of ordinary skill 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. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this disclosure.

[0181] Those skilled in the art can 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.

[0182] The above is only a specific embodiment of the present disclosure, but the protection scope of the present disclosure is not limited thereto. Any person skilled in the art who is familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present disclosure, which should be included in the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be based on the protection scope of the claims.

Claims

1. A method for sharing channel occupancy time, applied to an unlicensed frequency band for direct terminal communication, characterized in that: The method is performed by a first terminal device, and the method includes: Determine a remaining length of a first COT, and send first shared COT information to a second terminal device, where the first shared COT information includes the remaining length of the first COT; The first terminal device is a terminal device that initiates the COT, and the second terminal device is a terminal device that shares the COT; Determining the remaining length of the first COT includes: Determine the total length of the shared COT, and determine a first number of time slots, wherein the first number of time slots is the number of time slots occupied by the first terminal device for data transmission; Determine the first COT remaining length according to the total length of the shared COT, where the first COT remaining length is the COT remaining length determined by the first terminal; The determining the remaining length of the first COT according to the total length of the shared COT includes: Determine a second terminal device processing time, where the second terminal device processing time is the time required for the second terminal device to decode the direct connection control information SCI and prepare a data packet; Determine the remaining length of the first COT according to the total length of the shared COT, the number of time slot offsets, and the processing time of the second terminal device; The number of the first time slots is M, where M is a positive integer greater than 1, and the number of time slot offsets is the number of time slots between the time slots carrying the first shared COT information and the COT start time slot.

2. The method according to claim 1, characterized in that: The sending the first shared COT information to the second terminal device includes: Sending a first-stage SCI to the second terminal device via a physical direct control channel PSCCH, where the first-stage SCI includes the first shared COT information; or Sending a second-stage SCI to a second terminal device via a physical direct shared channel PSSCH, where the second-stage SCI includes the first shared COT information; or Sending the first shared COT information to the second terminal device through a symbol other than the PSCCH; or Sending the first shared COT information to the second terminal device through a symbol other than the PSSCH; or The first shared COT information is sent to the second terminal device through a media access control MAC control unit CE.

3. The method according to claim 1, characterized in that The first shared COT information also includes at least one of the following: COT identification ID; Channel access mode.

4. A method for sharing channel occupancy time, applied to an unlicensed frequency band for direct terminal communication, characterized in that: The method is performed by a second terminal device, and the method includes: Receiving first shared COT information sent by a first terminal device, where the first shared COT information includes a first COT remaining length; Determine a second COT remaining length, and determine second shared COT information, wherein the second shared COT information of the second terminal device includes the second COT remaining length; Sending the second shared COT information to a third terminal device; The first terminal device is a terminal device that initiates the COT, the second terminal device is a terminal device that shares the COT, and the third terminal device is another terminal device that shares the COT; Determining the remaining length of the second COT includes: Determine the remaining length of the first COT; Determine a second number of time slots, where the second number of time slots is the number of time slots occupied by the second terminal device for data transmission; Determine the second COT remaining length according to the first COT remaining length, where the second COT remaining length is the COT remaining length determined by the second terminal; The determining the second COT remaining length according to the first COT remaining length includes: Determine the second COT remaining length according to the first COT remaining length and the second terminal device processing time; The number of the second time slots is 1, and the second terminal device processing time is the time required for the second terminal device to decode the SCI and prepare the data packet; or, Determine the second COT remaining length according to the first COT remaining length and the second number of time slots; The number of the second time slots is N, where N is a positive integer greater than 1.

5. The method according to claim 4, characterized in that The sending the shared COT information of the second terminal device to the third terminal device includes: Sending a first-stage SCI to a third terminal device via a physical direct control channel PSCCH, where the first-stage SCI includes the second shared COT information of the second terminal device; or Sending a second-stage SCI to a third terminal device via a physical direct shared channel PSSCH, where the second-stage SCI includes second shared COT information of the second terminal device; or Send the second shared COT information of the second terminal device to the third terminal device through a symbol other than the PSCCH; or Send the second shared COT information of the second terminal device to the third terminal device through a symbol other than the PSSCH; or The second shared COT information of the second terminal device is sent to the third terminal device through the media access control MAC control element CE.

6. The method according to claim 4, characterized in that The second shared COT information also includes at least one of the following: COT ID; Channel access mode.

7. A device for sharing channel occupancy time, applied to terminal direct communication unlicensed frequency band, characterized in that: The device is applied to a first terminal device, and the device includes: A transceiver module, configured to determine a remaining length of a first COT, and send first shared COT information to a second terminal device, wherein the first shared COT information includes the remaining length of the first COT; Wherein, the second terminal device is a terminal device that shares the COT; The device also includes: A processing module, configured to determine a total length of the shared COT and determine a first number of time slots, wherein the first number of time slots is the number of time slots occupied by the first terminal device for data transmission; Determine a first COT remaining length according to the total length of the shared COT, where the first COT remaining length is the COT remaining length determined by the first terminal; The processing module is specifically used for: Determine a second terminal device processing time, where the second terminal device processing time is a time required for the second terminal device to decode the SCI and prepare a data packet; Determine the remaining length of the first COT according to the total length of the shared COT, the number of time slot offsets and the processing time of the second terminal device; The number of the first time slots is M, where M is a positive integer greater than 1, and the number of time slot offsets is the number of time slots between the time slots carrying the first shared COT information and the COT start time slot.

8. The device according to claim 7, characterized in that The transceiver module is specifically used for: Sending a first-stage SCI to the second terminal device via a physical direct control channel PSCCH, where the first-stage SCI includes the first shared COT information; or Sending a second-stage SCI to a second terminal device through a physical direct shared channel PSSCH, where the second-stage SCI includes the first shared COT information; or Sending the first shared COT information to the second terminal device through a symbol other than the PSCCH; or Sending the first shared COT information to the second terminal device through a symbol other than the PSSCH; or The first shared COT information is sent to the second terminal device through a media access control MAC control unit CE.

9. The device according to claim 7, characterized in that The first shared COT information also includes at least one of the following: COT ID; Channel access mode.

10. A device for sharing channel occupancy time, applied to terminal direct communication unlicensed frequency band, characterized in that: The device is applied to a second terminal device, and the device includes: A transceiver module, configured to receive first shared COT information sent by a first terminal device, wherein the first shared COT information sent by the first terminal device includes a remaining length of the first COT; and send second shared COT information of a second terminal device to a third terminal device; The first terminal device is a terminal device that initiates the COT, the second terminal device is a terminal device that shares the COT, and the third terminal device is another terminal device that shares the COT; A processing module, configured to determine a second COT remaining length, and determine second shared COT information of a second terminal device, wherein the second shared COT information of the second terminal device includes the second COT remaining length; The processing module is specifically used for: Determine the remaining length of the first COT; Determine a second number of time slots, where the second number of time slots is the number of time slots occupied by the second terminal device for data transmission; Determine a second COT remaining length according to the first COT remaining length, where the second COT remaining length is the COT remaining length determined by the second terminal; The processing module is specifically used for: Determine the second COT remaining length according to the first COT remaining length and the second terminal device processing time; The number of the second time slots is 1, and the second terminal device processing time is the time required for the second terminal device to decode the Sidelink control information SCI and prepare the data packet; or, Determine the second COT remaining length according to the first COT remaining length and the second number of time slots; The number of the second time slots is N, where N is a positive integer greater than 1.

11. The device according to claim 10, characterized in that The transceiver module is specifically used for: Sending a first-stage SCI to a third terminal device via a physical direct control channel PSCCH, where the first-stage SCI includes the second shared COT information of the second terminal device; or Sending a second-stage SCI to a third terminal device through a physical direct shared channel PSSCH, where the second-stage SCI includes second shared COT information of the second terminal device; or Sending the second shared COT information of the second terminal device to the third terminal device through a symbol other than the PSCCH; or Sending the second shared COT information of the second terminal device to the third terminal device through symbols other than the PSSCH; or The second shared COT information of the second terminal device is sent to the third terminal device through the media access control MAC control element CE.

12. The device according to claim 10, characterized in that The second shared COT information also includes at least one of the following: COT ID; Channel access mode.

13. A terminal device, characterized in that: The terminal device comprises a processor and a memory, wherein the memory stores a computer program, and the processor executes the computer program stored in the memory so that the terminal device executes the method according to any one of claims 1 to 3.

14. A terminal device, characterized in that: The terminal device comprises a processor and a memory, wherein the memory stores a computer program, and the processor executes the computer program stored in the memory so that the terminal device executes the method as claimed in any one of claims 4 to 6.

15. A computer-readable storage medium storing instructions, which, when executed, enable the method according to any one of claims 1 to 3 to be implemented.

16. A computer-readable storage medium storing instructions, which, when executed, enable the method according to any one of claims 4 to 6 to be implemented.

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