Method and device for determining shared channel occupancy time

Abstract

An embodiment of the present application discloses a method and device for determining a shared channel occupancy time, which can be applied to an unlicensed frequency band for terminal direct communication. The method includes: determining whether a first terminal device can share the COT initiated by a second terminal device based on a sharing condition of the channel occupancy time COT between terminal devices, so as to limit the first terminal device that can share the COT initiated by the second terminal device, thereby improving the efficiency of the terminal device accessing the channel and ensuring the success rate of the terminal device sending data using the shared COT.

Description

Technical Field

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

[0002] With the continuous emergence of new communication services and application requirements, terminal direct communication has increasingly higher requirements on transmission bandwidth, communication rate, communication delay, reliability, scalability and other performance. Unlicensed spectrum is needed to supplement the licensed spectrum to meet the diverse application scenarios and needs in the future. Therefore, research on terminal direct communication technology on unlicensed spectrum is imminent. Summary of the invention

[0003] The embodiment of the present application provides a method and device for determining the occupancy time of a shared channel, which can be applied to terminal direct communication between multiple terminal devices. By setting the conditions for sharing COT between terminal devices, the terminal devices that can share COT are determined to improve the efficiency of terminal devices accessing channels and ensure the success rate of terminal devices sending data using shared COT.

[0004] In a first aspect, an embodiment of the present application provides a method for determining a shared channel occupation time, which is applied to an unlicensed frequency band for terminal direct communication. The method is performed by a first terminal device, and the method includes:

[0005] Based on the sharing condition of the channel occupation time COT between the terminal devices, it is determined whether the first terminal device can share the COT initiated by the second terminal device.

[0006] In this technical solution, based on the sharing condition of the channel occupancy time COT between terminal devices, it is determined whether the first terminal device shares the COT initiated by the second terminal device, so as to limit the first terminal device that can share the COT initiated by the second terminal device, thereby improving the efficiency of terminal devices accessing the channel and ensuring the success rate of terminal devices sending data using the shared COT.

[0007] In one implementation, the determining whether the first terminal device can share the COT initiated by the second terminal device based on the sharing condition of the channel occupation time COT between the terminal devices includes:

[0008] Based on the distance information between the first terminal device and the second terminal device, it is determined whether the first terminal device can share the COT initiated by the second terminal device.

[0009] Optionally, the determining, based on the distance information between the first terminal device and the second terminal device, whether the first terminal device can use the COT initiated by the second terminal device includes:

[0010] receiving the second-stage SCI information sent by the second terminal device; the second-stage SCI information at least includes the first area identifier and the shared information of the COT;

[0011] It is determined that the first terminal device can share the COT initiated by the second terminal device, wherein the area identifier of the first terminal device is the same as the first area identifier.

[0012] Optionally, the determining, based on the distance information between the first terminal device and the second terminal device, whether the first terminal device can share the COT initiated by the second terminal device includes:

[0013] receiving the second-stage SCI information sent by the second terminal device; the second-stage SCI information at least includes a second area identifier;

[0014] Determining a distance between the first terminal device and the second terminal device based on the second area identifier;

[0015] It is determined that the first terminal device can share the COT initiated by the second terminal device, wherein the distance is less than a distance threshold, or the distance is within a preconfigured distance range.

[0016] Optionally, the determining, based on the second area identifier, a distance between the first terminal device and the second terminal device includes:

[0017] Determining geographic location information of the second terminal device according to the second area identifier;

[0018] The distance between the first terminal device and the second terminal device is determined according to the geographical location information of the first terminal device and the geographical location information of the second terminal device.

[0019] Optionally, the determining, based on the distance information between the first terminal device and the second terminal device, whether the first terminal device can share the COT initiated by the second terminal device includes:

[0020] Determine a reference signal received power RSRP measurement value of a demodulation reference signal DMRS of a physical direct link control channel PSCCH / physical direct link shared channel PSSCH;

[0021] Determine that the first terminal device can share the COT initiated by the second terminal device, wherein the RSRP measurement value is within a preconfigured power range, or the RSRP measurement value is greater than a predetermined preconfigured power threshold.

[0022] In another implementation, the determining whether the first terminal device can share the COT initiated by the second terminal device based on the sharing condition of the channel occupation time COT between the terminal devices includes:

[0023] Based on the resource pool where the terminal device is located, determine whether the first terminal device can share the COT initiated by the second terminal device.

[0024] Optionally, the determining, based on the resource pool where the terminal device is located, whether the first terminal device can share the COT initiated by the second terminal device includes:

[0025] It is determined that the first terminal device can share the COT initiated by the second terminal device, wherein a first resource pool where the first terminal device is located is the same as a second resource pool where the second terminal device is located.

[0026] In yet another implementation, the determining, based on the sharing condition of the channel occupancy time COT between the terminal devices, whether the first terminal device can share the COT initiated by the second terminal device includes:

[0027] Determining whether the first terminal device is a destination terminal device of the second terminal device;

[0028] It is determined that the first terminal device can share the COT initiated by the second terminal device, wherein the first terminal device is the destination terminal device of the second terminal device.

[0029] In yet another implementation, the determining, based on the sharing condition of the channel occupancy time COT between the terminal devices, whether the first terminal device can share the COT initiated by the second terminal device includes:

[0030] Based on the service type of the first terminal device, it is determined whether the first terminal device can share the COT initiated by the second terminal device.

[0031] Optionally, the determining, based on the service type of the first terminal device, whether the first terminal device can share the COT initiated by the second terminal device includes:

[0032] Determining that the first terminal device can share the COT sent by the second terminal device, wherein the service type of the first terminal device is a target service type;

[0033] The target service type includes at least any one of a unicast service, a multicast service and a broadcast service.

[0034] In yet another implementation, the determining, based on the sharing condition of the channel occupancy time COT between the terminal devices, whether the first terminal device can share the COT initiated by the second terminal device includes:

[0035] Based on the type of the channel to which the information sent by the terminal device belongs, it is determined whether the first terminal device can share the COT initiated by the second terminal device.

[0036] Optionally, the determining, based on the type of the channel to which the information sent by the terminal device belongs, whether the first terminal device can share the COT initiated by the second terminal device includes:

[0037] It is determined that the first terminal device can share the COT initiated by the second terminal device, wherein the type of the channel to which the information sent by the first terminal device belongs is the same as the type of the channel to which the information sent by the second terminal device belongs.

[0038] In a second aspect, an embodiment of the present application provides another method for determining a shared channel occupation time, which is applied to an unlicensed frequency band for terminal direct communication. The method is performed by a second terminal device, and the method includes:

[0039] The shared COT information is sent to the first terminal device.

[0040] In this technical solution, by sending shared COT information to the first terminal device so that the first terminal device can receive the shared COT information, COT sharing between terminal devices can be achieved, frequency band utilization can be improved, and communication service needs can be met.

[0041] In a third aspect, an embodiment of the present application provides a communication device, which is applied to an unlicensed frequency band for terminal direct communication, and the communication device includes:

[0042] The processing module is used to determine whether the first terminal device can share the COT initiated by the second terminal device based on the sharing condition of the channel occupation time COT between the terminal devices.

[0043] In this technical solution, whether the first terminal device shares the COT initiated by the second terminal device is determined based on the sharing condition of the channel occupancy time COT between terminal devices, so as to limit the first terminal device that can share the COT initiated by the second terminal device, thereby improving the efficiency of terminal devices accessing the channel and ensuring the success rate of terminal devices sending data using the shared COT.

[0044] In one implementation, the processing module is further configured to:

[0045] Based on the distance information between the first terminal device and the second terminal device, it is determined whether the first terminal device can share the COT initiated by the second terminal device.

[0046] Optionally, the device further comprises:

[0047] A transceiver module, configured to receive the second-stage SCI information sent by the second terminal device; the second-stage SCI information includes at least the first area identifier and the shared information of the COT;

[0048] The processing module is further used to determine that the first terminal device can share the COT initiated by the second terminal device, wherein the area identifier of the first terminal device is the same as the first area identifier.

[0049] Optionally, the device further comprises:

[0050] A transceiver module, configured to receive the second-stage SCI information sent by the second terminal device; the second-stage SCI information at least includes a second area identifier;

[0051] The processing module is further used for:

[0052] Determining a distance between the first terminal device and the second terminal device based on the second area identifier;

[0053] It is determined that the first terminal device can share the COT initiated by the second terminal device, wherein the distance is less than a distance threshold, or the distance is within a preconfigured distance range.

[0054] Optionally, the processing module is further used for:

[0055] Determining geographic location information of the second terminal device according to the second area identifier;

[0056] The distance between the first terminal device and the second terminal device is determined according to the geographical location information of the first terminal device and the geographical location information of the second terminal device.

[0057] Optionally, the processing module is further used for:

[0058] Determine a reference signal received power RSRP measurement value of a demodulation reference signal DMRS of a physical direct link control channel PSCCH / physical direct link shared channel PSSCH;

[0059] Determine that the first terminal device can share the COT initiated by the second terminal device, wherein the RSRP measurement value is within a preconfigured power range, or the RSRP measurement value is greater than a predetermined preconfigured power threshold.

[0060] In another implementation, the processing module is further configured to:

[0061] Based on the resource pool where the terminal device is located, determine whether the first terminal device can share the COT initiated by the second terminal device.

[0062] Optionally, the processing module is further used for:

[0063] It is determined that the first terminal device can share the COT initiated by the second terminal device, wherein a first resource pool where the first terminal device is located is the same as a second resource pool where the second terminal device is located.

[0064] In yet another implementation, the processing module is further configured to:

[0065] Determining whether the first terminal device is a destination terminal device of the second terminal device;

[0066] It is determined that the first terminal device can share the COT initiated by the second terminal device, wherein the first terminal device is the destination terminal device of the second terminal device.

[0067] In yet another implementation, the processing module is further configured to:

[0068] Based on the service type of the first terminal device, it is determined whether the first terminal device can share the COT initiated by the second terminal device.

[0069] Optionally, the processing module is further used for:

[0070] Determining that the first terminal device can share the COT sent by the second terminal device, wherein the service type of the first terminal device is a target service type;

[0071] The target service type includes at least any one of a unicast service, a multicast service and a broadcast service.

[0072] In yet another implementation, the processing module is further configured to:

[0073] Based on the type of the channel to which the information sent by the terminal device belongs, it is determined whether the first terminal device can share the COT initiated by the second terminal device.

[0074] Optionally, the processing module is further used for:

[0075] It is determined that the first terminal device can share the COT initiated by the second terminal device, wherein the type of the channel to which the information sent by the first terminal device belongs is the same as the type of the channel to which the information sent by the second terminal device belongs.

[0076] In a fourth aspect, an embodiment of the present application provides another communication device, which is applied to an unlicensed frequency band for terminal direct communication, and the communication device includes:

[0077] The transceiver module is used to send the shared COT information to the first terminal device.

[0078] In this technical solution, shared COT information is sent through the first terminal device so that the second terminal device can receive the shared COT information, thereby realizing COT sharing between terminal devices, improving frequency band utilization, and meeting communication service needs.

[0079] In a fifth aspect, an embodiment of the present application provides a communication device, which includes a processor. When the processor calls a computer program in a memory, the method described in the first aspect is executed.

[0080] In a sixth aspect, an embodiment of the present application provides a communication device, which includes a processor. When the processor calls a computer program in a memory, the method described in the second aspect is executed.

[0081] In the seventh aspect, an embodiment of the present application provides a communication device, which includes a processor and a memory, in which a computer program is stored; the processor executes the computer program stored in the memory so that the communication device executes the method described in the first aspect above.

[0082] In an eighth aspect, an embodiment of the present application provides a communication device, which includes a processor and a memory, in which a computer program is stored; the processor executes the computer program stored in the memory so that the communication device executes the method described in the second aspect above.

[0083] In a ninth aspect, an embodiment of the present application 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 above.

[0084] In a tenth aspect, an embodiment of the present application provides a computer-readable storage medium for storing instructions, which, when executed, enables the second terminal device to execute the method described in the second aspect above. BRIEF DESCRIPTION OF THE DRAWINGS

[0085] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the background technology, the drawings required for use in the embodiments of the present application or the background technology will be described below.

[0086] Figure 1 A schematic diagram of the architecture of a communication system provided in an embodiment of the present application;

[0087] Figure 2 A flowchart of a method for determining a shared channel occupancy time provided in an embodiment of the present application;

[0088] Figure 3 A flowchart of another method for determining the shared channel occupancy time provided in an embodiment of the present application;

[0089] Figure 4 A flowchart of another method for determining the shared channel occupancy time provided in an embodiment of the present application;

[0090] Figure 5 A flowchart of another method for determining the shared channel occupancy time provided in an embodiment of the present application;

[0091] Figure 6 A flowchart of another method for determining the shared channel occupancy time provided in an embodiment of the present application;

[0092] Figure 7 A flowchart of another method for determining the shared channel occupancy time provided in an embodiment of the present application;

[0093] Figure 8 A flowchart of another method for determining the shared channel occupancy time provided in an embodiment of the present application;

[0094] Fig. 9 A flowchart of another method for determining the shared channel occupancy time provided in an embodiment of the present application;

[0095] Fig.10 A flowchart of another method for determining the shared channel occupancy time provided in an embodiment of the present application;

[0096] Fig.11 A flowchart of another method for determining the shared channel occupancy time provided in an embodiment of the present application;

[0097] Fig.12 A schematic diagram of the structure of a communication device provided in an embodiment of the present application;

[0098] Fig.13 A schematic diagram of the structure of another communication device provided in an embodiment of the present application;

[0099] Fig.14 It is a structural diagram of a communication device 1400 provided in an embodiment of the present application. DETAILED DESCRIPTION

[0100] The embodiments of the present application 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 application, and should not be construed as limitations on the present application. In the description of the present application, 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 can exist, for example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone.

[0101] With the continuous emergence of new communication services and application requirements, terminal direct communication has increasingly higher requirements on transmission bandwidth, communication rate, communication delay, reliability, scalability and other performance. Unlicensed spectrum is needed to supplement the licensed spectrum to meet the diverse application scenarios and needs in the future. Therefore, the research on terminal direct connection (Sidelink, SL, also called direct link) communication technology on the unlicensed spectrum is imminent.

[0102] In the related art, in order to meet the requirement of continuous channel occupation time, a shared channel occupation time (COT) is designed between the base station and the terminal device. The terminal is directly deployed in the unlicensed frequency band. The terminal device needs to access the channel through the Type 1 Listen Before Talk (LBT) method each time. The LBT time is long, the efficiency is low, and the success rate of LBT is low.

[0103] In addition, based on the proposed design of sharing COT between terminal devices, since in the terminal direct communication system, there are multiple terminal devices around the terminal device that initiates the shared COT, and in multicast and broadcast, there are multiple terminal devices around that are receiving terminals of the terminal device that initiates the COT, there will be more terminal devices using the shared COT and conflicts will occur, resulting in low efficiency and a low success rate of LBT.

[0104] Based on the above problems, the embodiment of the present application proposes a method and device for determining the shared channel occupation time. In order to better understand the method for determining the shared channel occupation time applied in the embodiment of the present application, the communication system to which the embodiment of the present application is applicable is first described below.

[0105] See also Figure 1 , Figure 1 A schematic diagram of a communication system architecture provided in an embodiment of the present application. The communication system may include but is not limited to two terminal devices, wherein the terminal devices communicate with each other via a sidelink. Figure 1 The number and form of the devices shown are for illustrative purposes only and do not constitute a limitation on the embodiments of the present application. Figure 1 The communication system shown takes a first terminal device 101 and a second terminal device 102 as an example.

[0106] In the embodiment of the present application, the first terminal device 101 and the second terminal device 102 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 smart city (smart city), a wireless terminal device in smart home (smarthome), etc. The embodiment of the present application does not limit the specific technology and specific device form adopted by the terminal device.

[0107] It can be understood that the communication system described in the embodiment of the present application is for more clearly illustrating the technical solution of the embodiment of the present application, and does not constitute a limitation on the technical solution provided in the embodiment of the present application. Ordinary technicians in this field can know that with the evolution of the system architecture and the emergence of new business scenarios, the technical solution provided in the embodiment of the present application is also applicable to similar technical problems.

[0108] The method and device for determining the shared channel occupancy time provided by the present application are described in detail below with reference to the accompanying drawings.

[0109] See also Figure 2 , Figure 21 is a flow chart of a method for determining the shared channel occupancy time provided by an embodiment of the present application. It should be noted that the method for determining the shared channel occupancy time in the embodiment of the present application is applied to the terminal direct communication unlicensed frequency band, and the method is executed by the first terminal device, wherein the first terminal device is a terminal device sharing COT. Figure 2 As shown, the method for determining the shared channel occupancy time may include but is not limited to the following steps.

[0110] Step 201: Based on the sharing condition of COT between terminal devices, determine whether a first terminal device can share the COT initiated by a second terminal device.

[0111] In some embodiments of the present application, the second terminal device refers to a terminal device that initiates COT sharing. For example, the second terminal device can access the channel using the Type 1 LBT method, initiate a COT of a certain length, and send shared COT information to the first terminal device. After the first terminal device receives the shared COT information sent by the second terminal device, it determines whether it can share the COT initiated by the second terminal device based on the sharing conditions of the COT between the terminal devices.

[0112] Among them, the sharing conditions of COT between terminal devices can be preset in the terminal direct communication system. After receiving the shared COT information sent by the second terminal device, the first terminal device can determine whether it can share the COT initiated by the second terminal device according to the pre-defined sharing conditions of COT. In addition, the sharing conditions between terminal devices can be determined according to the actual application scenario, which is not limited in this application.

[0113] As an example, it can be determined whether the first terminal device can share the COT initiated by the second terminal device based on the distance information between the first terminal device and the second terminal device that initiates COT sharing, so as to improve the success rate of data transmission.

[0114] As another example, it is also possible to determine whether the first terminal device can share the COT initiated by the second terminal device based on whether the first terminal device can utilize the time-frequency domain resources in the shared COT of the second terminal device to send data, so as to ensure that the first terminal device can use the shared COT after receiving it.

[0115] As another example, terminal device identification information that can share the COT initiated by the second terminal device can also be pre-defined. After receiving the shared COT information initiated by the second terminal device, the first terminal device can compare itself with the pre-defined terminal device identification information to determine whether the COT initiated by the second terminal device can be shared.

[0116] According to the method for determining the shared channel occupancy time of an embodiment of the present application, whether the first terminal device shares the COT initiated by the second terminal device is determined through the sharing conditions of the channel occupancy time COT between terminal devices, so as to limit the first terminal device that can share the COT initiated by the second terminal device, thereby improving the efficiency of terminal devices accessing channels and ensuring the success rate of terminal devices sending data using the shared COT.

[0117] In order to facilitate the implementation of the above embodiment, the present application proposes another method for determining the shared channel occupancy time.

[0118] See also Figure 3 , Figure 3 This is a flow chart of another method for determining the shared channel occupancy time proposed in an embodiment of the present application. Figure 3 As shown, the method may include but is not limited to the following steps:

[0119] Step 301: Determine whether the first terminal device can share the COT initiated by the second terminal device based on the distance information between the first terminal device and the second terminal device.

[0120] In an embodiment of the present application, the distance information between the first terminal device and the second terminal device may be the zone information of the areas where the first terminal device and the second terminal device are respectively located, or may be the geographical distance between the first terminal device and the second terminal device, or may be other relevant information that can be used to indicate the distance between the first terminal device and the second terminal device, and the present application does not limit this.

[0121] That is to say, by judging the distance information between the first terminal device and the second terminal device, the first terminal device that is closer to the second terminal device can share the COT initiated by the second terminal device, while the first terminal device that is farther away from the second terminal device cannot share the COT initiated by the second terminal device, thereby ensuring the probability of successful transmission.

[0122] In one implementation, after the first terminal device receives the SCI (Sidelink Control Information) of the second terminal device, it can obtain the location information of the second terminal device carried therein by decoding the SCI, and compare the location information of the first terminal device with the location information of the second terminal device. Based on the comparison result, it is determined whether the COT initiated by the second terminal device can be shared.

[0123] According to the method for determining the occupancy time of a shared channel in an embodiment of the present application, it is determined whether the first terminal device can share the COT initiated by the second terminal device based on the distance information between the first terminal device and the second terminal device. That is, by allowing only the first terminal device that is closer to the second terminal device to share the COT initiated by the second terminal device, it is ensured that the interference environments around the first terminal device sharing the COT and the second terminal device initiating COT sharing are almost the same, thereby increasing the probability of successful data transmission and improving the effect of sharing COT between terminal devices.

[0124] Based on the above embodiment, another embodiment is proposed for determining whether the first terminal device can use the COT initiated by the second terminal device based on the distance information between the first terminal device and the second terminal device.

[0125] See also Figure 4 , Figure 4 A flowchart of another method for determining the shared channel occupancy time provided in an embodiment of the present application. Figure 4 As shown, the method may include but is not limited to the following steps:

[0126] Step 401, receiving the second-stage SCI information sent by the second terminal device; wherein the second-stage SCI information at least includes the first area identifier and the shared information of the COT.

[0127] In an embodiment of the present application, the second-stage SCI information sent by the second terminal device may include at least the first zone identifier and the shared information of the COT. The first zone identifier may be the zone identifier where the second terminal device is located, such as the zone identifier (Identity document, ID) of the zone where the second terminal device is located. The COT shared information may include at least one of the remaining length of the COT, the identification information of the COT, and the channel access mode, so that the first terminal device can access the channel according to the received COT shared information to realize the sharing of the COT.

[0128] In one implementation, the second-stage SCI information sent by the second terminal device carries the first area identifier and shared information of the COT. After the first terminal device receives the second-stage SCI information sent by the second terminal device, it can parse the SCI to obtain the area identifier and shared information of the COT where the second terminal device is located.

[0129] Step 402: Determine that the first terminal device can share the COT initiated by the second terminal device, wherein the area identifier of the first terminal device is the same as the first area identifier.

[0130] It can be understood that if the area identifier of the first terminal device is the same as the first area identifier, it means that the first terminal device and the second terminal device are in the same area, that is, the first terminal device and the second terminal device are geographically close, which means that the surrounding interference environment of the first terminal device and the second terminal device is basically the same, then the probability of the first terminal device sharing the COT transmission initiated by the second terminal device is higher, so the first terminal device can share the COT initiated by the second terminal device.

[0131] In one implementation, after the first terminal device decodes the SCI sent by the second terminal device, it obtains the zone ID of the second terminal device; the zoneID of the second terminal device is compared with its own zoneID. If the two are consistent, it means that the first terminal device can share the COT initiated by the second terminal device, and thus can access the channel based on the COT sharing information.

[0132] According to the method for determining the shared channel occupancy time of the embodiment of the present application, the first terminal device obtains the regional identifier of the second terminal device based on the received second-stage SCI information sent by the second terminal device. If the regional identifier of the first terminal device itself is consistent with the regional identifier of the second terminal device, the first terminal device can share the COT. In other words, according to whether the regional identifier of the first terminal device itself is consistent with the regional identifier of the second terminal device, the geographical distance between the first terminal device and the second terminal device is determined, thereby determining whether the first terminal device can share the COT initiated by the second terminal device, which can not only improve the probability of successful data transmission, but also improve the effect of sharing COT between terminal devices.

[0133] Based on the above embodiments, the present application proposes another implementation method for determining whether the first terminal device can use the COT step initiated by the second terminal device based on the distance information between the first terminal device and the second terminal device.

[0134] See also Figure 5 , Figure 5 A flowchart of another method for determining the shared channel occupancy time provided in an embodiment of the present application. Figure 5 As shown, the implementation of this method may include but is not limited to the following steps:

[0135] Step 501: receiving second-stage SCI information sent by a second terminal device; wherein the second-stage SCI information at least includes a second area identifier.

[0136] In an embodiment of the present application, the second-stage SCI information sent by the second terminal device may include at least a second zone identifier. The second zone identifier may be a zone identifier where the second terminal device is located, such as a zone ID of a zone where the second terminal device is located. In addition, the second-stage SCI information sent by the second terminal device may also include COT sharing information, wherein the COT sharing information may include at least one of the remaining length of the COT, the identification information of the COT, and the channel access method, so that the first terminal device can access the channel according to the received COT sharing information to realize the sharing of the COT.

[0137] In one implementation, after receiving the second-stage SCI information sent by the second terminal device, the first terminal device may parse the SCI to obtain the area identifier where the second terminal device is located.

[0138] Step 502: Determine the distance between the first terminal device and the second terminal device based on the second area identifier.

[0139] In one implementation, the geographic location information of the second terminal device may be determined according to the second area identifier; and the distance between the first terminal device and the second terminal device may be determined according to the geographic location information of the first terminal device and the geographic location information of the second terminal device.

[0140] As an example, if the second area identifier is the zone ID where the second terminal device is located, the corresponding x 1 and / or 1 , and calculate the geographic location coordinate information of the second terminal device based on the following formula (1), formula (2) and formula (3), and calculate the distance between the first terminal device and the second terminal device based on the following formula (4).

[0141]

[0142]

[0143] zone ID = 64y 1 +x 1 (3)

[0144] Wherein, zoneID is the zone ID where the second terminal device is located; 1 and / or 1It can be obtained by looking up the table according to the zoneID; L is the pre-configured zone length value (zone is a square); x is the geodesic longitude distance between the current position of the second terminal device and the geographic coordinates (0, 0), that is, the longitude value in the geographic coordinates of the second terminal device; y is the geodesic latitude distance between the current position of the second terminal device and the geographic coordinates (0, 0), that is, the latitude value in the geographic coordinates of the second terminal device.

[0145]

[0146] Wherein, M is the distance between the first terminal device and the second terminal device; x is the longitude value of the second terminal device in the geographic coordinates; y is the latitude value of the second terminal device in the geographic coordinates; x 2 is the longitude value in the geographic coordinates of the first terminal device; 2 is the latitude value in the geographic coordinates of the first terminal device.

[0147] Step 503: determine that the first terminal device can share the COT initiated by the second terminal device, wherein the distance between the first terminal device and the second terminal device is less than a distance threshold, or the distance between the first terminal device and the second terminal device is within a preconfigured distance range.

[0148] That is to say, a distance threshold or a distance range can be pre-configured according to the needs of the actual application scenario. If the distance between the first terminal device and the second terminal device is less than the distance threshold, or the distance between the first terminal device and the second terminal device is within the pre-configured distance range, it means that the distance between the first terminal device and the second terminal device is relatively close, and the surrounding interference environments of the first terminal device and the second terminal device are basically the same, which means that the probability of successful transmission of the COT initiated by the second terminal device using the first terminal device is relatively high, so the first terminal device can share the COT initiated by the second terminal device.

[0149] According to the method for determining the shared channel occupancy time of an embodiment of the present application, the first terminal device obtains the regional identifier of the second terminal device based on the second-stage SCI information sent by the second terminal device, and determines the distance between the first terminal device and the second terminal device based on the regional identifier. If the distance is less than a preset distance threshold, or within a preset distance range, the first terminal device can share the COT. In other words, based on the regional identifier of the second terminal device, the distance between the first terminal device and the second terminal device is determined. If the distance meets the predefined conditions, the COT initiated by the second terminal device can be shared, which can not only improve the probability of successful data transmission, but also improve the effect of sharing COT between terminal devices.

[0150] Based on the above embodiments, the present application proposes another implementation method for determining whether the first terminal device can use the COT step initiated by the second terminal device based on the distance information between the first terminal device and the second terminal device.

[0151] See also Figure 6 , Figure 6 A flowchart of another method for determining the shared channel occupancy time provided in an embodiment of the present application. Figure 6 As shown, the method may include but is not limited to the following steps:

[0152] Step 601: determine a reference signal received power RSRP measurement value of a demodulation reference signal DMRS of a physical direct link control channel PSCCH / physical direct link shared channel PSSCH.

[0153] It should be noted that when the first terminal device receives the SCI sent by the second terminal device, it will perform a reference signal receiving power (RSRP) measurement on the modulation reference signal (Demodulation Reference Signal, DMRS) of the physical direct link control channel (physical sidelink control channel, PSCCH) / physical sidelink share channel (physical sidelink share channel, PSSCH), so as to determine the RSRP measurement value.

[0154] Step 602, determining that the first terminal device can share the COT initiated by the second terminal device, wherein the RSRP measurement value is within a pre-configured power range, or the RSRP measurement value is greater than a predetermined pre-configured power threshold.

[0155] It can be understood that if the RSRP measurement value is within the pre-configured power range, or the RSRP measurement value is greater than the pre-configured power threshold, it means that the power loss in the SCI transmission process is small, which can indicate that the distance between the first terminal device and the second terminal device is close, and the interference environment around the first terminal device and the second terminal device is almost the same. In this way, if the first terminal device uses the COT initiated by the second terminal device for data transmission, the probability of successful transmission is greater, so the first terminal device can share the COT initiated by the second terminal device.

[0156] According to the method for determining the shared channel occupancy time of an embodiment of the present application, according to the RSRP measurement value of the DMRS of the PSCCH / PSSCH, if the RSRP measurement value is within a pre-configured power range, or the RSRP measurement value is greater than a predetermined pre-configured power threshold, the first terminal device can share the COT initiated by the second terminal device. In other words, the distance between the first terminal device and the second terminal device is obtained based on the RSRP measurement value to determine whether the first terminal device can share the COT initiated by the second terminal device, thereby increasing the probability of successful data transmission and improving the effect of sharing COT between terminal devices.

[0157] Since the sharing condition of the channel occupation time COT between terminal devices can be not only the condition of the distance information between the terminal devices, but also the limiting condition using other information, the present application proposes another embodiment.

[0158] See also Figure 7 , Figure 7 A flowchart of another method for determining the shared channel occupancy time provided in an embodiment of the present application is shown below. Figure 7 As shown, the method may include but is not limited to the following steps:

[0159] Step 701: Determine whether a first terminal device can share a COT initiated by a second terminal device based on a resource pool where the terminal device is located.

[0160] In one implementation, the SCI information sent by the second terminal device to the first terminal device can carry the resource pool information of the second terminal device, so the first terminal device can obtain the resource pool information of the second terminal device by decoding the received SCI information; the first terminal device compares the resource pool where it is located with the resource pool where the second terminal device is located to determine whether the first terminal device can share the COT initiated by the second terminal device.

[0161] In some embodiments of the present application, step 701 may be implemented by: determining that the first terminal device can share the COT initiated by the second terminal device, wherein the first resource pool where the first terminal device is located is the same as the second resource pool where the second terminal device is located.

[0162] It can be understood that if the first resource pool where the first terminal device is located is consistent with the second resource pool where the second terminal device is located, it means that the time-frequency domain resources in the COT initiated by the second terminal device are the same as the first resource pool where the first terminal device is located, that is, the first terminal device can use the time-frequency domain resources in the COT initiated by the second terminal device for data transmission. If the first resource pool where the first terminal device is located is inconsistent with the second resource pool where the second terminal device is located, it means that the time-frequency domain resources in the COT initiated by the second terminal device are different from the first resource pool where the first terminal device is located, that is, the first terminal device will not use the time-frequency domain resources in the COT initiated by the second terminal device for data transmission. Therefore, only when the first resource pool where the first terminal device is located is the same as the second resource pool where the second terminal device is located, can the first terminal device share the COT initiated by the second terminal device, thereby ensuring the probability of successful data transmission.

[0163] According to the method for determining the occupancy time of a shared channel in an embodiment of the present application, by determining whether the first terminal device shares the COT initiated by the second terminal device based on the resource pool where the terminal device is located, the first terminal device that can share the COT initiated by the second terminal device is limited, thereby improving the efficiency of the terminal device accessing the channel and ensuring the success rate of the terminal device sending data using the shared COT.

[0164] See also Figure 8 , Figure 8 A flowchart of another method for determining the shared channel occupancy time provided in an embodiment of the present application. Figure 8 As shown, the method may include but is not limited to the following steps:

[0165] Step 801: Determine whether the first terminal device is the destination terminal device of the second terminal device.

[0166] In some embodiments of the present application, for the application scenarios of multicast and broadcast services, when the second terminal device sends SCI information to the first terminal device, it can carry the identification information of the destination terminal device. The identification information of the destination terminal device, that is, the destination ID information, is carried by the first-stage SCI, and is the identification information of the terminal device that can share the COT initiated by the second terminal device.

[0167] In one implementation, a first terminal device receives and decodes the SCI information sent by a second terminal device, obtains the destination terminal device identification information of the second terminal device, i.e., the destination ID information; and compares the identification information of its own terminal device with the identification information of the destination terminal device. If the two are consistent, the first terminal device is the destination terminal device of the second terminal device; if the two are inconsistent, the first terminal device is not the destination terminal device of the second terminal device.

[0168] Step 802: Determine whether the first terminal device can share the COT initiated by the second terminal device, wherein the first terminal device is the destination terminal device of the second terminal device.

[0169] According to the method for determining the occupancy time of a shared channel in an embodiment of the present application, by judging whether the first terminal device is the destination terminal device of the second terminal device, it is determined whether the first terminal device can share the COT initiated by the second terminal device, so as to limit the first terminal device that can share the COT initiated by the second terminal device, thereby ensuring the success rate of the terminal device using the shared COT to send data, and improving the effect of sharing COT between terminal devices.

[0170] See also Fig. 9 , Fig. 9 A flowchart of another method for determining the shared channel occupancy time provided in an embodiment of the present application. Fig. 9 As shown, the method may include but is not limited to the following steps:

[0171] Step 901: Based on the service type of the first terminal device, determine whether the first terminal device can share the COT initiated by the second terminal device.

[0172] In some embodiments of the present application, the service type of the first terminal device that can share the COT initiated by the second terminal device can be predefined, and the first terminal device determines whether to share the COT initiated by the second terminal device based on its own service type.

[0173] In one feasible manner, it is determined that the first terminal device can share the COT sent by the second terminal device, wherein the service type of the first terminal device is the target service type; in addition, the target service type is a pre-configured service type of the first terminal device that can share the COT initiated by the second terminal device, which can include at least any one of a unicast service, a multicast service and a broadcast service.

[0174] According to the method for determining the occupancy time of a shared channel in an embodiment of the present application, whether the first terminal device can share the COT initiated by the second terminal device is determined by the service type of the first terminal device, so as to limit the first terminal device that can share the COT initiated by the second terminal device, thereby ensuring the success rate of the terminal device using the shared COT to send data and improving the effect of sharing COT between terminal devices.

[0175] See also Fig.10 , Fig.10 A flowchart of another method for determining the shared channel occupancy time provided in an embodiment of the present application. Fig.10 As shown, the method may include but is not limited to the following steps:

[0176] Step 1001: Determine whether a first terminal device can share a COT initiated by a second terminal device based on the type of the channel to which the information sent by the terminal device belongs.

[0177] It can be understood that the channel type to which the information sent by the terminal device belongs should be consistent with the channel type to which it is connected in order to achieve successful transmission of the information. That is to say, if the COT initiated by the second terminal device is a physical sidelink feedback channel (PSFCH), then only the first terminal device to which the channel type to which the information sent belongs is also a PSFCH channel can use the COT for data transmission; if the COT initiated by the second terminal device is a PSSCH channel, then only the first terminal device to which the channel type to which the information sent belongs is also a PSSCH channel can use the COT for data transmission.

[0178] In one achievable manner, it is determined that the first terminal device can share the COT initiated by the second terminal device, wherein the type of the channel to which the information sent by the first terminal device belongs is the same as the type of the channel to which the information sent by the second terminal device belongs. In other words, the first terminal device knows the type of channel to which the information to be sent belongs (such as a control channel, a feedback channel, a data channel), receives the information sent by the second terminal device, obtains the type of channel to which the second terminal device belongs, and compares the two. If the two are consistent, the first terminal device can share the COT initiated by the second terminal device, thereby improving the success rate of sharing COT between terminal devices.

[0179] According to the method for determining the occupancy time of a shared channel in an embodiment of the present application, whether a first terminal device can share the COT initiated by a second terminal device is determined by the type of channel to which the information sent by the terminal device belongs, so as to limit the first terminal device that can share the COT initiated by the second terminal device, thereby improving the success rate of sharing COT between terminal devices.

[0180] In order to implement the above method, the present application proposes another method for determining the shared channel occupancy time, which is applied to the unlicensed frequency band of terminal direct communication and is executed by the second terminal device, that is, by the terminal device that initiates COT sharing.

[0181] See also Fig.11 , Fig.11 A flowchart of another method for determining the shared channel occupancy time provided in an embodiment of the present application. Fig.11 As shown, the method may include but is not limited to the following steps:

[0182] Step 1101: Send shared COT information to the first terminal device.

[0183] In one implementation, the shared COT information may include at least one of the following: a remaining length of the COT, a unique identifier (Identity document, ID) of the COT, and a channel access method.

[0184] For example, the second terminal device can use Type 1 LBT method to access the channel, initiate a COT of a certain length, determine the remaining length of the COT according to the specific situation, and carry shared COT information including at least one of the COT remaining length, COT ID, and channel access method when conducting sidelink communication with the first terminal device.

[0185] When the first terminal device receives the shared COT information sent by the second terminal device, it can determine whether the first terminal device can share the COT initiated by the second terminal device based on the sharing conditions of the COT between the terminal devices. The method for determining whether the first terminal device can share the COT initiated by the second terminal device can adopt the above Figures 2 to 10 Any method in any embodiment is implemented, and the embodiments of the present application do not limit this and will not be repeated.

[0186] According to the method for determining the shared channel occupancy time of an embodiment of the present application, by sending shared COT information to the first terminal device so that the first terminal device can receive the shared COT information, COT sharing between terminal devices can be achieved, frequency band utilization can be improved, and communication service needs can be met.

[0187] In the above embodiments provided by the present application, the methods provided by the embodiments of the present application 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 application, 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. A certain function 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.

[0188] See also Fig.12 , Fig.12 A schematic diagram of the structure of a communication device provided in an embodiment of the present application. It should be noted that the device is applied to an unlicensed frequency band for terminal direct communication, and can be a first terminal device, a device in the first terminal device, or a device that can be used in conjunction with the first terminal device. Fig.12 The communication device shown may include a processing module 1201 .

[0189] In an embodiment of the present application, the processing module 1201 is used to determine whether the first terminal device can share the COT initiated by the second terminal device based on the sharing condition of the channel occupancy time COT between the terminal devices.

[0190] In one implementation, the processing module 1201 is further configured to:

[0191] Based on the distance information between the first terminal device and the second terminal device, it is determined whether the first terminal device can share the COT initiated by the second terminal device.

[0192] Optionally, the device further comprises:

[0193] The transceiver module 1202 is used to receive the second-stage SCI information sent by the second terminal device; the second-stage SCI information includes at least the first area identifier and the shared information of the COT;

[0194] The processing module 1201 is further used to determine that the first terminal device can share the COT initiated by the second terminal device, wherein the area identifier of the first terminal device is the same as the first area identifier.

[0195] Optionally, the device further comprises:

[0196] The transceiver module 1202 is used to receive the second-stage SCI information sent by the second terminal device; the second-stage SCI information at least includes the second area identifier;

[0197] The processing module 1201 is further used for:

[0198] Determining a distance between the first terminal device and the second terminal device based on the second area identifier;

[0199] It is determined that the first terminal device can share the COT initiated by the second terminal device, wherein the distance between the first terminal device and the second terminal device is less than a distance threshold, or the distance between the first terminal device and the second terminal device is within a preconfigured distance range.

[0200] Optionally, the processing module 1201 is further configured to:

[0201] Determining geographic location information of the second terminal device according to the second area identifier;

[0202] The distance between the first terminal device and the second terminal device is determined according to the geographical location information of the first terminal device and the geographical location information of the second terminal device.

[0203] Optionally, the processing module 1201 is further configured to:

[0204] Determine a reference signal received power RSRP measurement value of a demodulation reference signal DMRS of a physical direct link control channel PSCCH / physical direct link shared channel PSSCH;

[0205] It is determined that the first terminal device can share the COT initiated by the second terminal device, the RSRP measurement value is within a pre-configured power range, or the RSRP measurement value is greater than a predetermined pre-configured power threshold.

[0206] In another implementation, the processing module 1201 is further configured to:

[0207] Based on the resource pool where the terminal device is located, it is determined whether the first terminal device can share the COT initiated by the second terminal device.

[0208] Optionally, the processing module 1201 is further configured to:

[0209] It is determined that the first terminal device can share the COT initiated by the second terminal device, wherein a first resource pool where the first terminal device is located is the same as a second resource pool where the second terminal device is located.

[0210] In yet another implementation, the processing module 1201 is further configured to:

[0211] Determining whether the first terminal device is a destination terminal device of the second terminal device;

[0212] It is determined that the first terminal device can share the COT initiated by the second terminal device, wherein the first terminal device is the destination terminal device of the second terminal device.

[0213] In yet another implementation, the processing module 1201 is further configured to:

[0214] Based on the service type of the first terminal device, it is determined whether the first terminal device can share the COT initiated by the second terminal device.

[0215] Optionally, the processing module 1201 is further configured to:

[0216] Determine that the first terminal device can share the COT sent by the second terminal device, wherein the service type of the first terminal device is the target service type;

[0217] The target service type includes at least one of a unicast service, a multicast service and a broadcast service.

[0218] In yet another implementation, the processing module 1201 is further configured to:

[0219] Based on the type of the channel to which the information sent by the terminal device belongs, it is determined whether the first terminal device can share the COT initiated by the second terminal device.

[0220] Optionally, the processing module 1201 is further configured to:

[0221] It is determined that the first terminal device can share the COT initiated by the second terminal device, wherein the type of the channel to which the information sent by the first terminal device belongs is the same as the type of the channel to which the information sent by the second terminal device belongs.

[0222] According to the communication device of the embodiment of the present application, whether the first terminal device shares the COT initiated by the second terminal device is determined through the sharing condition of the channel occupancy time COT between the terminal devices, so as to limit the first terminal device that can share the COT initiated by the second terminal device, thereby improving the efficiency of the terminal device accessing the channel and ensuring the success rate of the terminal device sending data using the shared COT.

[0223] See also Fig.13 , Fig.13 This is a schematic diagram of the structure of another communication device provided in an embodiment of the present application. It should be noted that the communication device can be applied to the unlicensed frequency band for terminal direct communication, and the communication device can be a second terminal device, a device in the second terminal device, or a device that can be used in conjunction with the second terminal device. Fig.13 As shown, the communication device may include a transceiver module 1301 .

[0224] In an embodiment of the present application, the transceiver module 1301 is used to send shared COT information to the first terminal device.

[0225] According to the communication device of the embodiment of the present application, by sending shared COT information to the first terminal device, the first terminal device can receive the shared COT information, thereby realizing COT sharing between terminal devices, improving frequency band utilization, and meeting communication service needs.

[0226] See also Fig.14 , Fig.14 1 is a schematic diagram of the structure of a communication device 1400 provided in an embodiment of the present application. The communication device 1400 may be the first terminal device or the second terminal device in the aforementioned method embodiment, or may be a chip, a chip system, or a processor that supports the terminal device to implement the aforementioned method. The device may be used to implement the method described in the aforementioned method embodiment, and the details may refer to the description in the aforementioned method embodiment.

[0227] The communication device 1400 may include one or more processors 1401. The processor 1401 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.

[0228] Optionally, the communication device 1400 may further include one or more memories 1402, on which a computer program 1404 may be stored, and the processor 1401 executes the computer program 1404 so that the communication device 1400 performs the method described in the above method embodiment. Optionally, data may also be stored in the memory 1402. The communication device 1400 and the memory 1402 may be provided separately or integrated together.

[0229] Optionally, the terminal device 1400 may further include a transceiver 1405 and an antenna 1406. The transceiver 1405 may be referred to as a transceiver unit, a transceiver, or a transceiver circuit, etc., for implementing a transceiver function. The transceiver 1405 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.

[0230] Optionally, the terminal device 1400 may further include one or more interface circuits 1407. The interface circuit 1407 is used to receive code instructions and transmit them to the processor 1401. The processor 1401 runs the code instructions to enable the terminal device 1400 to execute the method described in the above method embodiment.

[0231] The terminal device 1400 is the second terminal device in the aforementioned method embodiment: the transceiver 1405 is used to execute Fig.11 Step 1101 in .

[0232] The terminal device 1400 is the first terminal device in the aforementioned method embodiment: the processor 1401 is used to execute Figure 2 Step 201, Figure 3 Step 301, Figure 4 Step 402, Figure 5 Steps 502 and 503 in Figure 6 Steps 601 and 602 in Figure 7 Step 701, Figure 8 Steps 801 and 802 in Fig. 9 Step 901 and Fig.10 Step 1001 in; transceiver 1405 is used to perform Figure 4Step 401 and Figure 5 Step 501 in .

[0233] In one implementation, the processor 1401 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.

[0234] In one implementation, the processor 1401 may store a computer program 1404, which runs on the processor 1401 and enables the terminal device 1400 to perform the method described in the above method embodiment. The computer program 1404 may be fixed in the processor 1401, in which case the processor 1401 may be implemented by hardware.

[0235] In one implementation, the terminal device 1400 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 this application can 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 can 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.

[0236] 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 this application is not limited thereto, and the structure of the terminal device may not be limited thereto. Fig.14The terminal device may be an independent device or may be part of a larger device. For example, the terminal device may be:

[0237] (1) Independent integrated circuit IC, or chip, or chip system or subsystem;

[0238] (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;

[0239] (3) ASIC, such as modem;

[0240] (4) Modules that can be embedded in other devices;

[0241] (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.;

[0242] (6)Others

[0243] Those skilled in the art may also understand that the various illustrative logical blocks and steps listed in the embodiments of the present application 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 application.

[0244] The embodiment of the present application also provides a system for determining the shared channel occupancy time, the system comprising the aforementioned Figures 2 to 10 In the embodiment, the communication device as the first terminal device in the aforementioned method embodiment and the aforementioned Fig.11 In the embodiment, the communication device serves as the second terminal device in the aforementioned method embodiment.

[0245] The present application 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.

[0246] The present application also provides a computer program product, which implements the functions of any of the above method embodiments when executed by a computer.

[0247] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented using 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 application is generated in whole or in part. The computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer program may 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 may 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 may be any available medium that a computer can access or a data storage device such as a server or data center that includes one or more available media integrated. The available medium may be a magnetic medium (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)).

[0248] A person skilled in the art may understand that the various numerical numbers such as first and second involved in the present application are only used for the convenience of description and are not used to limit the scope of the embodiments of the present application, and also indicate the order of precedence.

[0249] At least one in the present application can also be described as one or more, and a plurality can be two, three, four or more, which is not limited in the present application. In the embodiments of the present application, 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".

[0250] The corresponding relationships shown in each table in the present application 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 application. 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 application, 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.

[0251] The predefined in the present application may be understood as defined, predefined, stored, pre-stored, pre-negotiated, pre-configured, solidified, or pre-burned.

[0252] 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 application.

[0253] 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.

[0254] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A method for determining the occupancy time of a shared channel, It is characterized in that Applied in multicast and broadcast, the method is executed by a first terminal device, and the method includes: Based on the sharing condition, determine whether the first terminal device can share the channel occupation time COT; wherein the second terminal device uses the listen-before-talk LBT mode of type 1 to access the channel, initiates the COT and sends the shared COT information to the first terminal device, wherein the multiple terminal devices are receiving terminals of the second terminal device, and the sharing condition is preset in the terminal direct communication system; The determining, based on the sharing condition, whether the first terminal device can share the channel occupation time COT includes: Receiving side control information SCI sent by the second terminal device; Decoding the SCI to obtain resource pool information where the second terminal device is located, wherein the SCI information carries the resource pool information where the second terminal device is located; Comparing the resource pool where the first terminal device is located with the resource pool where the second terminal device is located; If the first resource pool where the first terminal device is located is the same as the second resource pool where the second terminal device is located, determining that the first terminal device can share the COT; If the first resource pool where the first terminal device is located is different from the second resource pool where the second terminal device is located, it is determined that the first terminal device cannot share the COT.

2. A communication device, It is characterized in that Applicable to multicast and broadcast, the device comprises: A processing module, configured to determine whether the first terminal device can share a channel occupation time COT based on a sharing condition, wherein the COT is initiated by a second terminal device accessing a channel using a listen-before-talk LBT mode of type 1, and the second terminal device sends shared COT information to the first terminal device, wherein a plurality of terminal devices are receiving terminals of the second terminal device, and the sharing condition is preset in a terminal direct communication system; The device also includes: A transceiver module, configured to receive side control information SCI sent by the second terminal device; The processing module is further used for: Decoding the SCI to obtain resource pool information where the second terminal device is located, wherein the SCI information carries the resource pool information where the second terminal device is located; Comparing the resource pool where the first terminal device is located with the resource pool where the second terminal device is located; If the first resource pool where the first terminal device is located is the same as the second resource pool where the second terminal device is located, determining that the first terminal device can share the COT; If the first resource pool where the first terminal device is located is different from the second resource pool where the second terminal device is located, it is determined that the first terminal device cannot share the COT.

3. A communication device, It is characterized in that The device comprises a processor and a memory, wherein a computer program is stored in the memory, and the processor executes the computer program stored in the memory so that the device performs the method according to claim 1 .

4. A computer-readable storage medium storing instructions, which, when executed, enable the method according to claim 1 to be implemented.

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