CN115553024A

CN115553024A - Method and device for sharing channel occupation time COT

Info

Publication number: CN115553024A
Application number: CN202280002621.6A
Authority: CN
Inventors: 赵文素
Original assignee: Beijing Xiaomi Mobile Software Co Ltd
Current assignee: Beijing Xiaomi Mobile Software Co Ltd
Priority date: 2022-08-02
Filing date: 2022-08-02
Publication date: 2022-12-30
Also published as: WO2024026701A1

Abstract

The embodiment of the disclosure discloses a method and a device for sharing a channel occupation time COT, which can be applied to the technical field of communication, wherein the method executed by a first terminal device comprises the following steps: sending COT sharing information to a second terminal device, wherein the COT sharing information is used for indicating the COT used by the second terminal device. Therefore, the second terminal device can share the COT with the first terminal device based on the COT sharing information, so that the terminal device can obtain longer communication time, the LBT success rate is improved, and the communication service requirement is met.

Description

Method and device for sharing channel occupation time COT

Technical Field

The present disclosure relates to the field of communications technologies, and in particular, to a method and an apparatus for sharing a channel occupancy time COT.

Background

With the continuous generation of new communication services and application requirements, the requirements of terminal direct connection (SL, also called Sidelink) communication on performance such as transmission bandwidth, communication rate, communication delay, reliability, expandability and the like are higher and higher, and future diversified application scenarios and requirements cannot be met only by limited authorized spectrum. Therefore, research on the Sidelink communication technology of the terminal equipment on the unlicensed spectrum is urgent.

Disclosure of Invention

The embodiment of the disclosure provides a method and a device for sharing a channel occupation time COT, which can be applied to the technical field of communication.

In a first aspect, an embodiment of the present disclosure provides a method for sharing a channel occupancy time COT, where the method is performed by a first terminal device, and the method includes: sending COT sharing information to a second terminal device, wherein the COT sharing information is used for indicating the COT used by the second terminal device.

In the disclosure, the first terminal device sends the COT sharing information to the second terminal device, so that the second terminal device can share the COT with the first terminal device based on the COT sharing information, and further, the terminal device obtains longer communication time, improves the LBT success rate, and meets the communication service requirement.

In a second aspect, an embodiment of the present disclosure provides another method for sharing a channel occupancy time COT, where the method is performed by a second terminal device, and the method includes: and receiving COT sharing information sent by the first terminal equipment, wherein the COT sharing information is used for indicating the COT used by the second terminal equipment.

In the disclosure, the second terminal device determines the COT used by itself by receiving the COT shared information sent by the first terminal device, so that the second terminal device can share the COT with the first terminal device based on the COT shared information, and further, the terminal device obtains longer communication time, improves the LBT success rate, and meets the communication service requirement.

In a third aspect, an embodiment of the present disclosure provides a first terminal device, including:

a transceiver module, configured to send COT sharing information to a second terminal device, where the COT sharing information is used to indicate a COT used by the second terminal device.

In a fourth aspect, an embodiment of the present disclosure provides a second terminal device, including:

and the transceiver module is configured to receive COT sharing information sent by the first terminal device, where the COT sharing information is used to indicate a COT used by the second terminal device.

In a fifth aspect, the disclosed embodiments provide a communication device comprising a processor, which, when calling a computer program in a memory, executes the method of the first aspect.

In a sixth aspect, the disclosed embodiments provide a communication device comprising a processor that, when calling a computer program in a memory, performs the method of the second aspect described above.

In a seventh aspect, an embodiment of the present disclosure provides a communication apparatus, including a processor and a memory, where the memory stores a computer program; the computer program, when executed by the processor, causes the communication device to perform the method of the first aspect described above.

In an eighth aspect, an embodiment of the present disclosure provides a communication apparatus, including a processor and a memory, in which a computer program is stored; the computer program, when executed by the processor, causes the communication device to perform the method of the second aspect described above.

In a ninth aspect, the disclosed embodiments provide a communication apparatus, the apparatus comprising a processor and an interface circuit, the interface circuit being configured to receive code instructions and transmit the code instructions to the processor, and the processor being configured to execute the code instructions to cause the apparatus to perform the method of the first aspect.

In a tenth aspect, the disclosed embodiments provide a communication apparatus, the apparatus comprising a processor and an interface circuit, the interface circuit being configured to receive code instructions and transmit the code instructions to the processor, and the processor being configured to execute the code instructions to cause the apparatus to perform the method of the second aspect.

In an eleventh aspect, the disclosed embodiments provide a communication system, which includes the first terminal device in the third aspect and the second terminal device in the fourth aspect, or the system includes the communication apparatus in the fifth aspect and the communication apparatus in the sixth aspect, or the system includes the communication apparatus in the seventh aspect and the communication apparatus in the eighth aspect, or the system includes the communication apparatus in the ninth aspect and the communication apparatus in the tenth aspect.

In a twelfth aspect, an embodiment of the present invention provides a computer-readable storage medium, configured to store instructions for the first terminal device, where the instructions, when executed, enable the method described in the first aspect to be implemented.

In a thirteenth aspect, an embodiment of the present invention provides a computer-readable storage medium for storing instructions for the second terminal device, where the instructions, when executed, cause the method of the second aspect to be implemented.

In a fourteenth aspect, the present disclosure also provides a computer program product comprising a computer program which, when run on a computer, causes the computer to perform the method of the first aspect described above.

In a fifteenth aspect, the present disclosure also provides a computer program product comprising a computer program which, when run on a computer, causes the computer to perform the method of the second aspect described above.

In a sixteenth aspect, the present disclosure provides a chip system comprising at least one processor and an interface for enabling a first terminal device to implement the functionality according to the first aspect, e.g. to determine or process at least one of data and information related in the above method. In one possible design, the chip system further comprises a memory for storing computer programs and data necessary for the first terminal device. The chip system may be formed by a chip, or may include a chip and other discrete devices.

In a seventeenth aspect, the present disclosure provides a chip system, which includes at least one processor and an interface, for enabling a second terminal device to implement the functions referred to in the second aspect, for example, to determine or process at least one of data and information referred to in the above method. In one possible design, the chip system further comprises a memory for storing computer programs and data necessary for the second terminal device. The chip system may be formed by a chip, or may include a chip and other discrete devices.

In an eighteenth aspect, the present disclosure provides a computer program which, when run on a computer, causes the computer to perform the method of the first aspect described above.

In a nineteenth aspect, the present disclosure provides a computer program which, when run on a computer, causes the computer to perform the method of the second aspect described above.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments or the background art of the present disclosure, the drawings required to be used in the embodiments or the background art of the present disclosure will be described below.

Fig. 1 is a schematic architecture diagram of a communication system provided by an embodiment of the present disclosure;

fig. 2 is a flowchart illustrating a method for sharing a channel occupancy time COT according to an embodiment of the present disclosure;

fig. 3 is a flowchart illustrating a method for sharing a channel occupancy time COT according to another embodiment of the present disclosure;

fig. 4 is a flowchart illustrating a method for sharing a channel occupancy time COT according to another embodiment of the present disclosure;

fig. 5 is a flowchart illustrating a method for sharing a channel occupancy time COT according to another embodiment of the present disclosure;

fig. 6 is a flowchart illustrating a method for sharing a channel occupancy time COT according to another embodiment of the present disclosure;

fig. 7 is a flowchart illustrating a method for sharing a channel occupancy time COT according to another embodiment of the present disclosure;

fig. 8 is a flowchart illustrating a method for sharing a channel occupancy time COT according to another embodiment of the present disclosure;

fig. 9 is a flowchart illustrating a method for sharing a channel occupancy time COT according to another embodiment of the present disclosure;

fig. 10 is a schematic structural diagram of a communication device according to an embodiment of the present disclosure;

fig. 11 is a schematic structural diagram of a communication device according to another embodiment of the present disclosure;

fig. 12 is a schematic structural diagram of a chip according to an embodiment of the disclosure.

Detailed Description

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. The following description refers to the accompanying drawings in which the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the exemplary embodiments below do not represent all implementations consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the disclosure, as detailed in the appended claims.

It is understood that "a plurality" in this disclosure means two or more, and other words are analogous. "and/or" describes the association relationship of the associated objects, meaning that there may be three relationships, e.g., a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship. The singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

For ease of understanding, terms referred to in the present application will be first introduced.

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

Referring to fig. 1, fig. 1 is a schematic diagram of a communication system architecture according to 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 through a Sidelink. The number and configuration of the devices shown in fig. 1 are for example only and do not limit the embodiments of the disclosure. The communication system shown in fig. 1 is exemplified by including a first terminal apparatus 101, a second terminal apparatus 102, and a third terminal apparatus 103.

It should be noted that the technical solutions of the embodiments of the present disclosure can be applied to various communication systems. For example: a Long Term Evolution (LTE) system, a fifth generation (5 th generation, 5G) mobile communication system, a 5G New Radio (NR) system, or other future new mobile communication systems.

The first terminal device 101, the second terminal device 102 and the third terminal device 103 in the embodiment of the present disclosure may be entities for receiving or transmitting signals, such as mobile phones, respectively. A terminal device may also be referred to as a terminal device (terminal), a User Equipment (UE), a Mobile Station (MS), a mobile terminal device (MT), etc. The terminal device may be an automobile with a communication function, a smart automobile, a mobile phone (mobile phone), a wearable device, a tablet computer (Pad), a computer with a wireless transceiving 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 unmanned driving (self-driving), a wireless terminal device in remote surgery (remote medical supply), a wireless terminal device in smart grid (smart grid), a wireless terminal device in transportation safety (transportation safety), a wireless terminal device in smart city (smart city), a wireless terminal device in smart home (smart home), and the like. The embodiments of the present disclosure do not limit the specific technology and the specific device form adopted by the terminal device.

It is to be understood that the communication system described in the embodiment of the present disclosure is for more clearly illustrating the technical solutions of the embodiment of the present disclosure, and does not constitute a limitation to the technical solutions provided in the embodiment of the present disclosure, and as a person having ordinary skill in the art knows, with the evolution of the system architecture and the appearance of a new service scenario, the technical solutions provided in the embodiment of the present disclosure are also applicable to similar technical problems.

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

Referring to fig. 2, fig. 2 is a flowchart illustrating a method for sharing a channel occupancy time COT according to an embodiment of the present disclosure, where the method is executed by a first terminal device. As shown in fig. 2, the method may include, but is not limited to, the steps of:

step 21, sending COT sharing information to the second terminal device, where the COT sharing information is used to indicate a COT used by the second terminal device.

The first terminal device is configured to initiate a COT, and the second terminal device is a terminal device sharing the COT.

In one implementation, the COT sharing information may include a time domain resource and/or a frequency domain resource allocated for the second terminal device.

The time domain resource allocated by the first terminal device to the second terminal device may be used to indicate which part of the time domain resource of the COT the second terminal device may share, and then the second terminal device may perform information transmission based on the allocated time domain resource.

The frequency domain resource allocated by the first terminal device to the second terminal device may be used to indicate which part of the frequency domain resource of the COT the second terminal device may share, and then the second terminal device may perform information transmission based on the allocated frequency domain resource.

In one implementation, after receiving the time domain resource and/or the frequency domain resource of the COT allocated by the first terminal device, the second terminal device may perform a type2 (type 2) Listen Before Talk (LBT) access channel on the allocated time frequency domain resource.

In one implementation, the COT sharing information may further include usage information of the COT.

The COT use condition information is used for informing the terminal equipment sharing the COT of the COT use condition. For example, the usage information of the COT may include a total length of the COT, a length of the COT that has been used, a remaining length of the COT, a sharing status indication information of the COT, and the like. The present disclosure is not limited thereto. Thus, the second terminal device, after receiving the usage information of the COT, can share the COT based on the usage information of the COT.

The COT sharing state indication information is used for indicating whether the COT is used for information transmission of the current time slot or the micro time slot or whether the COT can be used for information transmission of the future time slot or the micro time slot, and the future time slot refers to the next time slot or a plurality of time slots of the current time slot.

By implementing the embodiment of the disclosure, the first terminal device sends the COT sharing information to the second terminal device, so that the second terminal device can share the COT with the first terminal device based on the COT sharing information, and further, the terminal device obtains longer communication time, improves the LBT success rate, and meets the communication service requirement.

Referring to fig. 3, fig. 3 is a flowchart illustrating another method for sharing a channel occupancy time COT according to an embodiment of the present disclosure, where the method is executed by a first terminal device. As shown in fig. 3, the method may include, but is not limited to, the following steps:

step 31, sending COT sharing information to the second terminal device, where the COT sharing information includes time domain resources and/or frequency domain resources allocated to the second terminal device.

In one implementation, the COT sharing information may further include a start position and a length of the frequency domain resource, or a start slot position and a slot length of the time domain resource.

Optionally, the frequency domain Resource allocation granularity may be an index of a subchannel or an Inter Resource Block (IRB). The present disclosure is not limited thereto.

The starting position of the frequency domain resource may be a starting frequency domain resource when the second terminal device performs information transmission. For example, the first subchannel and the first comb resource block.

The length of the frequency domain resource may be a frequency domain resource occupied by the second terminal device for information transmission. For example, the frequency domain resource may be 3 subchannels, 2 comb resource blocks in length. The present disclosure is not limited thereto.

Optionally, the frequency domain resources allocated by the first terminal device to each second terminal device may be the same or different. If the frequency domain resources allocated by the first terminal device to each second terminal device are the same, the frequency domain resource information may be indicated only once. If the frequency domain resources allocated by the first terminal device to each second terminal device are different, the frequency domain resource information needs to be indicated for each second terminal device.

For example, when the frequency domain resources allocated by the first terminal device to each second terminal device are different, the starting position of the frequency domain resource allocated by the first terminal device to the second terminal device 1 may be subchannel0, and the length may be 4, then the frequency domain resource that can be used by the second terminal device 1 is subchannel0-4; the initial position of the frequency domain resource allocated by the first terminal device to the second terminal device 2 is subchannel3, and the length may be 4, so that the frequency domain resource that can be used by the second terminal device 2 is subchannel3-7.

The starting time slot position of the time domain resource may be a starting time slot when the second terminal device performs information transmission. Such as. The second slot solt2, the third slot solt3, etc.

The length of the time domain resource may be the number of time slots occupied by the second terminal device for information transmission. For example, the length of the time domain resource may be 3 slots, 2 slots, etc.

In some embodiments of the present disclosure, if the second terminal device sharing the COT transmits on a single slot basis, that is, if the slot length is 1 slot, it may only indicate that the second terminal device may share the start slot position of the COT. Alternatively, it may be indicated by a slot offset value with respect to the start position of the COT. The present disclosure is not limited thereto.

For example, the start position of the COT is solt0, and the timeslot offset value of the second terminal device relative to solt0 is 3, then the start timeslot position of the second terminal device is solt2.

In some embodiments of the present disclosure, if the second terminal devices sharing the COT transmit based on multiple slots, that is, the slot length is not 1 slot, it is necessary to respectively indicate the start position and the length of the time domain resource allocated to each second terminal device.

For example, the total slot length of the COT is 10solt, and the second terminal device sharing the COT includes a second terminal device 1, a second terminal device 2, and a second terminal device 3. The time slots used by the first terminal device are solt0, solt1 and solt2, the position of the real time slot allocated for the second terminal device 1 is solt3, and the length is 2; the real time slot position allocated to the second terminal device 2 is solt5, and the length is 3; the second terminal 3 is assigned its real timeslot position solt8 and length 2.

In this embodiment of the disclosure, in order to enable each second terminal device to accurately obtain, from the COT shared information, the time domain resource and/or the frequency domain resource allocated by the first terminal device to itself, the first terminal device may further include, in the COT shared information, identity information of each second terminal device.

In one implementation, the COT sharing information further includes ID information, and the ID information may include at least one of:

layer 1 destination ID or source ID information of the second terminal device;

group ID (member ID) of each second terminal device in the multicast.

In the embodiment of the present disclosure, identification (ID) information included in the COT sharing information is used to indicate ID information of the second terminal device, that is, identity information used to distinguish different second terminal devices sharing the same COT.

The layer 1 destination ID of the second terminal device may be understood as the physical layer ID of the second terminal device.

In an implementation manner, the first terminal device may further allocate a time domain resource and/or a frequency domain resource to a plurality of second terminal devices sharing the same COT according to group IDs corresponding to the plurality of second terminal devices, respectively.

By implementing the embodiment of the disclosure, the first terminal device sends the time domain resource and/or the frequency domain resource allocated to the second terminal device, so that the second terminal device can share the COT with the first terminal device based on the COT sharing information, and further the terminal device obtains longer communication time, improves the LBT success rate, and meets the communication service requirement.

Referring to fig. 4, fig. 4 is a flowchart illustrating another method for sharing a channel occupancy time COT according to an embodiment of the present disclosure, where the method is executed by a first terminal device. As shown in fig. 4, the method may include, but is not limited to, the steps of:

step 41, sending COT sharing information to the second terminal devices, where the frequency domain resources allocated to each second terminal device included in the COT sharing information are the same.

In the embodiment of the present disclosure, the frequency domain resources allocated by the first terminal device to all the second terminal devices may be the same, and the starting position and the length of the frequency domain resources may be configured in advance. The frequency domain resources are assumed to be the entire LBT sub-band.

In this embodiment of the present disclosure, the COT sharing information may further include a time domain resource allocated to the second terminal device, and ID information. Therefore, each second terminal device can obtain the corresponding time domain resource from the received COT shared information according to the ID information of the second terminal device.

For example, a first terminal device UE1 initiates 1 COT, where the length of the COT is 4ms, when a subcarrier is 15 kilohertz (khz), the length of the COT is 4 slots, and when information transmission is performed by UE1, slot0 is used, and COT sharing information is sent in slot0, indicating that a second terminal device with a destination ID of UE2 shares slot1 of the COT, and a used frequency domain resource is subchannel0-4; indicating that the second terminal equipment with the target ID of UE3 shares the time slot2 of the COT, the used frequency domain resource is subchannel3-7, indicating that the second terminal equipment with the target ID of UE4 shares the time slot3 of the COT, and the used frequency domain resource is subchannel3-7.

By implementing the embodiment of the present disclosure, a frequency domain resource may be configured for the second terminal device in advance, and then the second terminal device may share the COT with the first terminal device based on the COT sharing information by sending the COT sharing information including the time domain resource to the second terminal device, so that the terminal device obtains a longer communication time, improves the LBT success rate, and meets the communication service requirement.

Referring to fig. 5, fig. 5 is a flowchart illustrating another method for sharing a channel occupancy time COT according to an embodiment of the present disclosure, where the method is executed by a first terminal device. As shown in fig. 5, the method may include, but is not limited to, the following steps:

step 51, sending COT sharing information to the second terminal device, where the COT sharing information is used to indicate a COT used by the second terminal device.

In one implementation, the COT sharing information may include at least one of:

the remaining length of the COT;

the sharing status indication information of COT; and the COT sharing state indication information is used for indicating whether the COT is used for information transmission of the current time slot or the micro-slot or whether the COT can be used for information transmission of future time slots or the micro-slot, wherein the future time slots refer to one or more next time slots of the current time slot, and the future micro-slot refers to one or more next micro-slots of the current micro-slot.

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

In some embodiments of the present disclosure, the remaining length of the COT may be represented in terms of a bit length. For example, assuming that the remaining length of the COT is 3 slots (slots), it can be represented using "0111". Alternatively, the remaining length of the COT may be indicated by an indication signal (indicator), and the indicator may indicate a row in a preconfigured table of the remaining lengths of the COT, where the row corresponds to a value of the remaining length of the COT, and is in slot or minislot units.

In the embodiment of the present disclosure, the information with a length of 1 bit may be used to represent the shared status indication information of the COT. For example, "1" may indicate that the COT is not interrupted, and the information transmission of the current time slot or the information transmission of the future time slot of the second terminal device may share the COT, and the second terminal device uses the type 2LBT access channel. "0" indicates that the COT has been interrupted, and the information transmission of the current time slot or the information transmission of the future time slot of the second terminal device cannot share the COT, and only the LBT access channel of type 1type 1 can be used.

For example, if the COT sharing information sent by the first terminal device includes the remaining length of the COT. A first terminal device UE1 initiates 1 COT with a length of 6 slots, UE1 itself uses slot0 for information transmission, and then the remaining length of the sent COT is 5 slots, for a second terminal device UE2 sharing the COT, UE2 shares the COT and uses slot1 for information transmission, and then UE2 continues to send the remaining length of the COT to be 4 slots until other second terminal devices sharing the COT use the last 1 slot, that is, slot5 for information transmission, and the remaining length of the sent COT is 0.

For example, if the COT sharing information sent by the first terminal device includes the sharing status indication information of the COT. The method comprises the steps that a first terminal device UE1 initiates 1 COT with the length of 6 slots, the UE1 uses slot0 for self transmission, the COT sharing state information is sent, if the information bit is '1', the COT is indicated to be not interrupted, a second terminal device UE2 can share the COT and carry out information transmission on the slot1, the COT sharing state information is sent, if the information bit is '0', the COT is indicated to be interrupted, starting from the slot2, other terminal devices cannot use the COT even if the COT sharing condition is met, and other terminal device access channels can only use LBT with the type1 (type 1).

By implementing the embodiment of the disclosure, the COT sharing information can be sent to the second terminal device, so that the second terminal device can share the COT with the first terminal device based on the COT sharing information, and further the terminal device obtains longer communication time, improves the LBT success rate, and meets the communication service requirement.

Referring to fig. 6, fig. 6 is a flowchart illustrating another method for sharing a channel occupancy time COT according to an embodiment of the present disclosure, where the method is executed by a second terminal device. As shown in fig. 6, the method may include, but is not limited to, the following steps:

and step 61, receiving COT sharing information sent by the first terminal device, where the COT sharing information is used to indicate a COT used by the second terminal device.

In one implementation, the COT sharing information may include a time domain resource and/or a frequency domain resource allocated by the first terminal device to the second terminal device.

The frequency domain resources allocated by the first terminal device to the second terminal device may be used to indicate which part of the frequency domain resources of the COT may be shared by the second terminal device, and the second terminal device may perform information transmission based on the allocated frequency domain resources.

In one implementation, after receiving the time domain resource and/or the frequency domain resource of the COT allocated by the first terminal device, the second terminal device may access the channel using a type2 (type 2) Listen Before Talk (LBT) manner based on the allocated time domain resource and/or frequency domain resource.

The usage information of the COT is used for notifying the second terminal device sharing the COT of the usage of the COT. For example, the usage information of the COT may include a total length of the COT, a length of the COT that has been used, a remaining length of the COT, a sharing status indication information of the COT, and the like. The present disclosure is not limited thereto. And the second terminal device may share the COT based on the usage information of the COT.

The COT sharing state indication information is used for indicating whether the COT is used for information transmission of the current time slot or not, or whether the COT can be used for information transmission of future time slots, and the future time slots refer to one or more time slots next to the current time slot.

By implementing the embodiment of the disclosure, the second terminal device determines the COT used by itself by receiving the COT shared information sent by the first terminal device, so that the COT can be shared with the first terminal device based on the COT shared information, and further, the terminal device obtains longer communication time, improves the LBT success rate, and meets the communication service requirement.

Referring to fig. 7, fig. 7 is a flowchart illustrating another method for sharing a channel occupancy time COT according to an embodiment of the present disclosure, where the method is executed by a second terminal device. As shown in fig. 7, the method may include, but is not limited to, the steps of:

step 71, receiving COT shared information sent by the first terminal device, where the COT shared information includes time domain resources and/or frequency domain resources allocated by the first terminal device to the second terminal device.

Optionally, the COT sharing information may further include a start position and a length of the frequency domain resource, or a start slot position and a slot length of the time domain resource.

Optionally, the frequency-domain Resource allocation granularity may be an index of a subchannel or an Inter Resource Block (IRB). The present disclosure is not limited thereto.

Optionally, the frequency domain resources allocated by the first terminal device to each second terminal device included in the COT sharing information may be the same or different. If the frequency domain resources allocated by the first terminal device to each second terminal device are the same, the frequency domain resource information may be indicated only once. If the frequency domain resources allocated by the first terminal device to each second terminal device are different, the frequency domain resource information needs to be indicated for each second terminal device.

For example, when the frequency domain resources allocated by the first terminal device to each second terminal device are different, the starting position of the frequency domain resource allocated by the first terminal device to the second terminal device 1 may be subchannel0, and the length may be 4, then the frequency domain resource that can be used by the second terminal device 1 is subchannel0-4; the initial position of the frequency domain resource allocated by the first terminal device to the second terminal device 2 is subchannel3, and the length may be 4, so that the frequency domain resource that can be used by the second terminal device 2 is subchannel3-7. Then, each second terminal device may determine its corresponding frequency domain resource from the COT shared information according to its ID information.

The length of the time domain resource may be the number of time slots occupied by the second terminal device for information transmission. For example, the time domain resource may be 3 slots, 2 slots, etc.

For example, the total slot length of the COT is 10solt, and the second terminal device sharing the COT includes a second terminal device 1, a second terminal device 2, and a second terminal device 3. The time slots used by the first terminal device are solt0, solt1 and solt2, the position of the real time slot allocated for the second terminal device 1 is solt3, and the length is 2; the real time slot position allocated to the second terminal device 2 is solt5, and the length is 3; the second terminal 3 is assigned its real timeslot position solt8 and length 2. And then, each second terminal device may obtain the time domain resource for information transmission from the COT shared information according to the ID information of the second terminal device.

In one implementation, the COT sharing information further includes ID information, which may include at least one of:

layer 1 destination ID or source ID information of the second terminal device;

the group ID of each second end device in the multicast.

In the embodiment of the present disclosure, the ID information included in the COT sharing information is used to indicate ID information of each second terminal device, that is, identity information used to distinguish different second terminal devices sharing the same COT.

And 72, accessing the channel by using a listen before send LBT mode of Type2 based on the time domain resources and/or the frequency domain resources.

In the embodiment of the present disclosure, after acquiring the corresponding time domain resource and/or frequency domain resource from the COT shared information, the second terminal device may access the channel by using a Type2 listen before talk LBT method based on the time domain resource and/or frequency domain resource, thereby implementing information transmission.

By implementing the embodiment of the disclosure, the second terminal device receives the time domain resource and/or the frequency domain resource allocated to the second terminal device by the first terminal device, so that the second terminal device can share the COT with the first terminal device based on the time domain resource and/or the frequency domain resource, and further the terminal device obtains longer communication time, improves the success rate of LBT, and meets the requirement of communication service.

Referring to fig. 8, fig. 8 is a flowchart illustrating another method for sharing a channel occupancy time COT according to an embodiment of the present disclosure, where the method is executed by a second terminal device. As shown in fig. 8, the method may include, but is not limited to, the following steps:

step 81, receiving COT sharing information sent by the first terminal device, where the frequency domain resources allocated by the first terminal device to each second terminal device in the COT sharing information are the same.

For example, a first terminal device UE1 initiates 1 COT, where the length of the COT is 4ms, when a subcarrier is 15 kilohertz (khz), the length of the COT is 4 slots, and UE1 uses slot0 for information transmission, and sends COT sharing information in slot0, where the slot sharing information indicates that a second terminal device with a destination ID of UE2 shares slot1 of the COT, and a used frequency domain resource is subchannel0-4; indicating that the second terminal device with the destination ID of UE3 shares slot2 of the COT, using the frequency domain resource as subchannel3-7, indicating that the second terminal device with the destination ID of UE4 shares slot3 of the COT, and using the frequency domain resource as subchannel3-7. And then, each second terminal device can transmit information based on the corresponding time domain resource and frequency domain resource.

By implementing the embodiment of the disclosure, the second terminal device receives the COT shared information sent by the first terminal device and performs information transmission based on the COT shared information, thereby realizing the COT sharing with the first terminal device, further enabling the terminal device to obtain longer communication time, improving the LBT success rate, and meeting the communication service requirements.

Referring to fig. 9, fig. 9 is a flowchart illustrating another method for sharing a channel occupancy time COT according to an embodiment of the present disclosure, where the method is executed by a second terminal device. As shown in fig. 9, the method may include, but is not limited to, the steps of:

step 91, receiving COT sharing information sent by the first terminal device, where the COT sharing information is used to indicate a COT used by the second terminal device.

Optionally, the COT sharing information may include at least one of:

the remaining length of the COT;

the sharing status indication information of COT;

and the COT sharing state indication information is used for indicating whether the COT is used for information transmission of the current time slot or the micro-slot or whether the COT can be used for information transmission of future time slots or the micro-slot, wherein the future time slots refer to one or more next time slots of the current time slot, and the future micro-slot refers to one or more next micro-slots of the current micro-slot.

Alternatively, the remaining length of the COT may be indicated by an indicator signal (indicator), and the indicator may indicate a certain row in a preconfigured remaining length table of the COT, where the row corresponds to a value of the remaining length of the COT, and is in units of slots or miniports.

For example, if the COT sharing information sent by the first terminal device includes the remaining length of the COT. First terminal equipment UE1 initiates 1 COT with a length of 6 slots, UE1 uses slot0 for information transmission, and then the remaining length of the sent COT is 5 slots.

For example, if the COT sharing information sent by the first terminal device includes the sharing status indication information of the COT. The first terminal device UE1 initiates 1 COT with a length of 6 slots, UE1 transmits its own transmission using slot0, and sends the shared status information of the COT, and if the information bit is "1", it indicates that the COT is not interrupted, the second terminal device UE2 may share the COT, and may enable type 2LBT to access the channel.

Step 92, the COT shared information is updated.

It can be understood that the second terminal device may share the COT based on the COT sharing information after receiving the COT sharing information sent by the first terminal device, but the second device may change the COT sharing information after using the shared COT for information transmission. Therefore, the second terminal device needs to update the COT sharing information.

Optionally, if the COT sharing information is the remaining length of the COT, the second terminal device may determine the remaining length of the COT according to a usage situation of the second terminal device on the COT.

For example, the first terminal initiates 1 COT with a length of 6 slots, and the first terminal device UE1 uses slot0 for information transmission, so that the remaining length of the sent COT is 5 slots. After receiving the remaining length of the COT sent by the first terminal device, the second terminal device UE2 uses slot1 for information transmission, and then the terminal device UE2 updates the remaining length of the COT, that is, the updated remaining length of the COT is 4 slots.

Optionally, if the COT includes the sharing state indication information of the shared information COT, the second terminal device may further determine whether information transmission of the current time slot of other terminal devices sharing the COT shares the COT, or indicate whether information transmission of a future time slot shares the COT.

For example, the first terminal device UE1 initiates 1 COT with a length of 6 slots, the UE1 itself uses slot0 for transmission, sends the shared state information of the COT, and the information bit is "1", which indicates that the COT is not interrupted, and the second terminal device UE2 may share the COT and perform information transmission on slot 1. Meanwhile, the second terminal device UE2 may update the shared state information of the COT, and if the information bit of the updated shared state information of the COT is "0", it indicates that the COT is interrupted, starting from slot2, other terminal devices may not use the COT even if the COT sharing condition is satisfied, and the access channel of other terminal devices may only use the LBT of type1 (type 1). If the information bit of the updated shared state information of the COT is "1", which indicates that the COT is not interrupted, starting from slot2, other terminal devices may use the COT, and an access channel of other terminal devices may use LBT of type 2.

And step 93, sending the updated COT sharing information to the third terminal equipment.

The third terminal device may be a terminal device that shares the COT but does not perform information transmission based on the COT.

It can be understood that the second terminal device sends the updated COT sharing information to the third terminal device, so that the third terminal device sharing the COT can share the COT based on the updated COT sharing information. By implementing the embodiment of the disclosure, the second terminal device can share the COT with the first terminal device through the received COT sharing information, and send the updated COT sharing information to the third terminal device, so that the third terminal device can share the COT based on the updated COT sharing information, thereby realizing the COT sharing among the terminal devices, entering to enable the terminal devices to obtain longer communication time, improving the success rate of LBT, and meeting the requirements of communication services.

In the embodiments provided by the present disclosure, the methods provided by the embodiments of the present disclosure are introduced from the perspective of the first terminal device and the second terminal device, respectively. In order to implement the functions in the method provided by the embodiment of the present disclosure, the first terminal device and the second terminal device may include a hardware structure and a software module, and the functions are implemented in the form of a hardware structure, a software module, or a hardware structure and a software module. Some of the above functions may be implemented by a hardware structure, a software module, or a hardware structure plus a software module.

Fig. 10 is a schematic structural diagram of a communication device 100 according to an embodiment of the present disclosure. The communication device 100 shown in fig. 10 may include a processing module 1001 and a transceiver module 1002.

The transceiver module 1002 may include a sending module and/or a receiving module, where the sending module is used to implement a sending function, the receiving module is used to implement a receiving function, and the transceiver module 1002 may implement a sending function and/or a receiving function.

It is understood that the communication apparatus 100 may be a terminal device, may be an apparatus in the first terminal device, and may also be an apparatus capable of being used in cooperation with the first terminal device.

Communication apparatus 100, on a first terminal device side, comprising:

the transceiver module 1002 is configured to send COT sharing information to the second terminal device, where the COT sharing information is used to indicate a COT used by the second terminal device.

In one implementation, the COT sharing information includes a time domain resource and/or a frequency domain resource allocated to the second terminal device.

In one implementation, the COT sharing information further includes a start position and a length of the frequency domain resource, or a start slot position and a slot length of the time domain resource.

In one implementation, the COT sharing information further includes ID information, and the ID information includes at least one of:

layer 1 destination ID or source ID information of the second terminal device;

a group ID of each second end device in the multicast.

In one implementation, the frequency domain resources allocated to each second terminal device included in the COT sharing information are the same.

In one implementation, the COT sharing information includes at least one of:

the remaining length of the COT;

the sharing status indication information of COT;

and the COT sharing state indication information is used for indicating whether the COT is used for information transmission of the current time slot or the micro-slot or whether the COT can be used for information transmission of the future time slot or the micro-slot.

According to the communication device provided by the disclosure, the first terminal equipment sends the COT sharing information to the second terminal equipment, so that the second terminal equipment can share the COT with the first terminal equipment based on the COT sharing information, and further, the terminal equipment can obtain longer communication time, the LBT success rate is improved, and the communication service requirement is met.

It is understood that the communication apparatus 100 may be the second terminal device, may be an apparatus in the second terminal device, and may also be an apparatus capable of being used with the second terminal device.

Communication apparatus 100, on the side of a second terminal device, comprising:

the transceiver module 1002 is configured to receive COT sharing information sent by a first terminal device, where the COT sharing information is used to indicate a COT used by a second terminal device.

In one implementation manner, the COT sharing information includes a time domain resource and/or a frequency domain resource allocated by the first terminal device to the second terminal device.

layer 1 destination ID or source ID information of the second terminal device;

the group ID of each second end device in the multicast.

In one implementation, the frequency domain resources allocated by the first terminal device to the second terminal device included in the COT sharing information are the same.

In an implementation manner, the processing module 1001 is configured to access a channel using a Type2 listen before talk LBT scheme based on time domain resources and/or frequency domain resources.

In one implementation, the COT sharing information includes at least one of:

the remaining length of the COT;

the sharing status indication information of COT;

In one implementation, the processing module 1001 is configured to update COT shared information;

the transceiver module 1002 is configured to send the updated COT sharing information to the third terminal device.

According to the communication device provided by the disclosure, the second terminal device determines the COT used by the second terminal device by receiving the COT sharing information sent by the first terminal device, so that the COT can be shared with the first terminal device based on the COT sharing information, the terminal device can obtain longer communication time, the LBT success rate is improved, and the communication service requirement is met.

Referring to fig. 11, fig. 11 is a schematic structural diagram of another communication device 110 according to an embodiment of the disclosure. The communication apparatus 110 may be a first terminal device, a second terminal device, a chip, a system-on-chip, or a processor that supports the first terminal device to implement the method, or a chip, a system-on-chip, or a processor that supports the second terminal device to implement the method. The apparatus may be configured to implement the method described in the method embodiment, and refer to the description in the method embodiment.

The communication device 110 may include one or more processors 1101. The processor 1101 may be a general purpose processor, a special purpose processor, or the like. For example, a baseband processor or a central processor. The baseband processor may be configured to process communication protocols and communication data, and the central processor may be configured to control a communication device (e.g., a base station, a baseband chip, a terminal device chip, a DU or CU, etc.), execute a computer program, and process data of the computer program.

Optionally, the communication device 110 may further include one or more memories 1102 on which computer programs 1104 may be stored, and the processor 1101 executes the computer programs 1104, so that the communication device 110 performs the methods described in the above method embodiments. Optionally, the memory 1102 may further store data therein. The communication device 110 and the memory 1102 may be separate or integrated.

Optionally, the communication device 110 may further include a transceiver 1105 and an antenna 1106. The transceiver 1105 may be referred to as a transceiving unit, a transceiver, or a transceiving circuit, etc., for implementing transceiving functions. The transceiver 1105 may include a receiver and a transmitter, and 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 transmission circuit, etc. for implementing the transmission function.

Optionally, one or more interface circuits 1107 may also be included in communication device 110. Interface circuitry 1107 is used to receive code instructions and transmit them to processor 1101. The processor 1101 executes the code instructions to cause the communication device 110 to perform the methods described in the above method embodiments.

The communication apparatus 110 is a first terminal device: the transceiver 1105 is used to perform step 21 in fig. 2; step 31 in fig. 3; step 41 in fig. 4; or step 51 in fig. 5.

The communication device 110 is a second terminal apparatus: processor 1101 is configured to perform step 72 in fig. 7; step 92 in fig. 9; the transceiver 1105 is used to perform step 61 in fig. 6; step 71 in fig. 7; step 81 in fig. 8; or step 91, step 93 in fig. 9.

In one implementation, a transceiver may be included in the processor 1101 for performing receive and transmit functions. The transceiver may be, for example, a transceiver circuit, or an interface circuit. The transmit and receive circuitry, interfaces or interface circuitry used to implement the receive and transmit functions may be separate or integrated. The transceiver circuit, the interface circuit or the interface circuit may be used for reading and writing code/data, or the transceiver circuit, the interface circuit or the interface circuit may be used for transmitting or transferring signals.

In one implementation, the processor 1101 may have a computer program 1103 stored thereon, and the computer program 1103 running on the processor 1101 may cause the communication apparatus 110 to perform the method described in the above method embodiments. The computer program 1103 may be solidified in the processor 1101, in which case the processor 1101 may be implemented in hardware.

In one implementation, the communication device 110 may include circuitry that may implement the functionality of transmitting or receiving or communicating in the foregoing method embodiments. The processors and transceivers described in this disclosure may be implemented on Integrated Circuits (ICs), analog ICs, radio Frequency Integrated Circuits (RFICs), mixed signal ICs, application Specific Integrated Circuits (ASICs), printed Circuit Boards (PCBs), electronic devices, and the like. The processor and transceiver may also be fabricated using various IC process technologies, such as Complementary Metal Oxide Semiconductor (CMOS), N-type metal oxide semiconductor (NMOS), P-type metal oxide semiconductor (PMOS), bipolar Junction Transistor (BJT), bipolar CMOS (BiCMOS), silicon germanium (SiGe), gallium arsenide (GaAs), and the like.

The communication apparatus in the above description of the embodiment may be a network device or a terminal device, but the scope of the communication apparatus described in the present disclosure is not limited thereto, and the structure of the communication apparatus may not be limited by fig. 11. The communication means may be a stand-alone device or may be part of a larger device. For example, the communication means may be:

(1) A stand-alone integrated circuit IC, or chip, or system-on-chip or subsystem;

(2) A set of one or more ICs, which may optionally also include storage means for storing data, computer programs;

(3) An ASIC, such as a Modem (Modem);

(4) A module that may be embedded within other devices;

(5) Receivers, terminal devices, intelligent terminal devices, cellular phones, wireless devices, handsets, mobile units, in-vehicle devices, network devices, cloud devices, artificial intelligence devices, and the like;

(6) Others, and so forth.

For the case that the communication device may be a chip or a system of chips, see the schematic structural diagram of the chip shown in fig. 12. The chip 120 shown in fig. 12 includes a processor 1201 and an interface 1202. The number of the processors 1201 may be one or more, and the number of the interfaces 1202 may be more.

For the case that the chip is used for realizing the functions of the terminal device in the embodiments of the present disclosure:

an interface 1202 for performing step 21 in fig. 2; step 31 in fig. 3; step 41 in fig. 4; or step 51 in fig. 5.

For the case where the chip is used to implement the functions of the network device in the embodiments of the present disclosure:

processor 1201, processor 1101 is configured to execute step 72 in fig. 7; step 92 in fig. 9.

An interface 1202 for performing step 61 in fig. 6; step 71 in fig. 7; step 81 in fig. 8; or step 91, step 93 in fig. 9.

Optionally, the chip further comprises a memory 1203, the memory 1203 being used for storing necessary computer programs and data.

Those of skill in the art will also appreciate that the various illustrative logical blocks and steps (step) set forth in the embodiments of the disclosure may be implemented in electronic hardware, computer software, or combinations of both. Whether such functionality is implemented as hardware or software depends upon the particular application and design requirements of the overall system. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the disclosed embodiments.

The embodiment of the present disclosure further provides a communication system, where the system includes the communication apparatus as the first terminal device and the communication apparatus as the second terminal device in the foregoing fig. 11 embodiment, or the system includes the communication apparatus as the first terminal device and the communication apparatus as the second terminal device in the foregoing fig. 12 embodiment.

The present disclosure also provides a computer-readable storage medium having stored thereon instructions which, when executed by a computer, implement the functionality of any of the above-described method embodiments.

The present disclosure also provides a computer program product which, when executed by a computer, implements the functionality of any of the above-described method embodiments.

In the above embodiments, the implementation may be wholly or partially realized by software, hardware, firmware, or any combination thereof. When implemented in software, may 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. The procedures or functions according to the embodiments of the present disclosure are wholly or partially generated when the computer program is loaded and executed on a computer. The computer may be a general purpose computer, a special purpose computer, a network of computers, 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 by wire (e.g., coaxial cable, fiber optic, digital Subscriber Line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.). 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, a data center, etc., that incorporates one or more of the available media. The usable medium may be a magnetic medium (e.g., a floppy disk, a hard disk, a magnetic tape), an optical medium (e.g., a Digital Video Disk (DVD)), or a semiconductor medium (e.g., a Solid State Disk (SSD)), among others.

Those of ordinary skill in the art will understand that: various numerical numbers of the first, second, etc. referred to in this disclosure are only for convenience of description and distinction, and are not used to limit the scope of the embodiments of the disclosure, and also represent a sequential order.

At least one of the present disclosure may also be described as one or more, and a plurality may be two, three, four or more, without limitation of the present disclosure. In the embodiment 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", and the like, and the technical features described in "first", "second", "third", "a", "B", "C", and "D" are not in the order of priority or magnitude.

It should be understood that although the terms first, second, third, etc. may be used in the embodiments of the present application to describe various information, the information should not be limited to these terms. These terms are only used to distinguish one type of information from another. For example, first information may also be referred to as second information, and similarly, second information may also be referred to as first information, without departing from the scope of embodiments of the present application. As used herein, the words "if" and "if" may be interpreted as "at \8230; \8230when" or "at 8230; \8230when" or "in response to a determination" or "at \8230; \8230inthe case of \8230.

The correspondence shown in the tables in the present disclosure may be configured or predefined. The values of the information in each table are merely examples, and may be configured as other values, and the disclosure is not limited thereto. When the correspondence between the information and each parameter is configured, it is not always necessary to configure all the correspondences indicated in each table. For example, in the table in the present disclosure, the correspondence shown by some rows may not be configured. For another example, appropriate modification adjustments, such as splitting, merging, etc., can be made based on the above tables. The names of the parameters in the tables may be other names understandable by the communication device, and the values or the expression of the parameters may be other values or expressions understandable by the communication device. When the above tables are implemented, other data structures may be used, for example, arrays, queues, containers, stacks, linear tables, pointers, linked lists, trees, graphs, structures, classes, heaps, hash tables, or the like may be used.

Predefinition in this disclosure may be understood as defining, predefining, storing, pre-negotiating, pre-configuring, curing, or pre-firing.

Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the technical solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present disclosure.

It is further to be understood that while operations are depicted in the drawings in a particular order, this is not to be understood as requiring that such operations be performed in the particular order shown or in serial order, or that all illustrated operations be performed, to achieve desirable results. In certain environments, multitasking and parallel processing may be advantageous.

Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This application is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.

It can be clearly understood by those skilled in the art that, for convenience and simplicity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.

The above description is only for the specific embodiments of the present disclosure, but the scope of the present disclosure is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present disclosure, and all the changes or substitutions should be covered within the scope of the present disclosure. Therefore, the protection scope of the present disclosure shall be subject to the protection scope of the claims.

Claims

1. A method for sharing a channel occupancy time, COT, wherein the method is performed by a first terminal device, and wherein the first terminal device is configured to initiate the COT, and wherein the method comprises:

sending COT sharing information to a second terminal device, wherein the COT sharing information is used for indicating the COT used by the second terminal device.

2. The method of claim 1, wherein the COT sharing information comprises time domain resources and/or frequency domain resources allocated for the second terminal device.

3. The method of claim 2, wherein the COT sharing information further includes a start position and length of the frequency domain resources or a start slot position and slot length of the time domain resources.

4. The method of claim 2, wherein the COT sharing information further includes ID information, the ID information including at least one of:

layer 1 destination ID or source ID information of the second terminal device;

the group ID of each second end device in the multicast.

5. The method of claim 2, wherein the frequency domain resources allocated for each second terminal device included in the COT sharing information are the same.

6. The method of claim 1, wherein the COT sharing information comprises at least one of:

the remaining length of the COT;

shared state indication information of the COT;

the COT sharing state indication information is used for indicating whether the COT is used for information transmission of the current time slot or the micro time slot or whether the COT can be used for information transmission of the future time slot or the micro time slot.

7. A method for sharing a channel occupancy time, COT, wherein the method is performed by a second terminal device, and wherein the method comprises:

and receiving COT sharing information sent by the first terminal equipment, wherein the COT sharing information is used for indicating the COT used by the second terminal equipment.

8. The method of claim 7, wherein the COT sharing information comprises time domain resources and/or frequency domain resources allocated by the first terminal device to the second terminal device.

9. The method of claim 8, wherein the COT sharing information further includes a start position and length of the frequency domain resources or a start slot position and slot length of the time domain resources.

10. The method of claim 8, wherein the COT sharing information further comprises ID information, the ID information comprising at least one of:

layer 1 destination ID or source ID information of the second terminal device;

a group ID of each of the second end devices in the multicast.

11. The method of claim 8, wherein the frequency domain resources allocated by the first terminal device to each second terminal device included in the COT sharing information are the same.

12. The method as claimed in any one of claims 8-11, wherein after receiving the COT sharing information transmitted by the first terminal device, further comprising:

and based on the time domain resources and/or the frequency domain resources, accessing the channel by using a Type2 listen before send LBT mode.

13. The method of claim 7, wherein the COT sharing information comprises at least one of:

the remaining length of the COT;

shared state indication information of the COT;

14. The method of claim 13, wherein after receiving the COT sharing information transmitted by the first terminal device, further comprising:

updating the COT sharing information;

and sending the updated COT sharing message to the third terminal equipment.

15. A first terminal device comprising:

16. A second terminal device comprising:

a transceiver module, configured to receive COT sharing information sent by a first terminal device, where the COT sharing information is used to indicate a COT used by a second terminal device.

17. A communication apparatus, characterized in that the apparatus comprises a processor and a memory, in which a computer program is stored, the processor executing the computer program stored in the memory to cause the apparatus to perform the method according to any one of claims 1 to 6, or to perform the method according to any one of claims 7 to 14

18. A communication system, characterized in that the communication system comprises a first terminal device performing the method according to any of claims 1-6 and a second terminal device for performing the method according to any of claims 7-14.

19. A computer readable storage medium storing instructions that, when executed, cause the method of any one of claims 1 to 6 to be implemented, or cause the method of any one of claims 7 to 14 to be implemented.