A channel occupancy information indication method, a communication terminal and a storage medium

Abstract

This application provides a channel occupancy information indication method, a communication terminal, and a storage medium. The method includes: determining shared channel occupancy information, the shared channel occupancy information including shared channel occupancy time information; performing resource mapping of a first physical channel, copying the resource elements mapped to the first channel on a first target symbol to the preceding orthogonal frequency division multiplexing (OFDM) symbol adjacent to the first target symbol, wherein the first physical channel is used to indicate the shared channel occupancy information, and the first target symbol is an OFDM symbol within one time slot of the physical channel; and transmitting the first physical channel to at least one second communication terminal.

Description

Technical Field

[0001] This application relates to the field of communication technology, such as a method for indicating channel occupancy information, a communication terminal, and a storage medium. Background Technology

[0002] In unlicensed spectrum, terminals perform a channel access procedure and can only use the channel after assessing its availability. On unlicensed spectrum, communication terminals using sidelink technology can reserve a channel by performing a channel access procedure. After a communication terminal completes its channel access procedure, it is best to reserve the channel immediately; otherwise, the channel may be preempted by other communication terminals.

[0003] However, communication terminals using sidelink technology can only occupy the channel at limited times, which puts them at a significant disadvantage in channel contention. Therefore, effectively improving the channel occupancy rate of communication terminals using sidelink technology is a pressing technical problem that needs to be solved. Summary of the Invention

[0004] This application provides a method for indicating channel occupancy information, a communication terminal, and a storage medium.

[0005] This application provides a channel occupancy information indication method, applied to a first communication terminal, including:

[0006] Determine shared channel occupancy information, which includes shared channel occupancy time information;

[0007] Perform resource mapping of the first physical channel, copy the resource element mapped by the first channel on the first target symbol to the previous orthogonal frequency division multiplexing symbol adjacent to the first target symbol, the first physical channel is used to indicate the shared channel occupancy information, and the first target symbol is an orthogonal frequency division multiplexing symbol in one time slot of the first physical channel;

[0008] Send the first physical channel to at least one second communication terminal.

[0009] This application also provides a channel occupancy information indication method, applied to a second communication terminal, including:

[0010] The system receives a first physical channel sent by a first communication terminal. The first physical channel is used to indicate shared channel occupancy information, which includes shared channel occupancy time information.

[0011] Sidelink information is transmitted within the shared channel occupancy time indicated by the shared channel occupancy time information;

[0012] The resource mapping of the first physical channel includes copying the resource element mapped by the first channel on the first target symbol to the preceding orthogonal frequency division multiplexing symbol adjacent to the first target symbol. The first target symbol is an orthogonal frequency division multiplexing symbol within one time slot of the first physical channel.

[0013] This application also provides a first communication terminal, including: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement the above-described channel occupancy information indication method.

[0014] This application also provides a second communication terminal, including: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement the above-described channel occupancy information indication method.

[0015] This application also provides a storage medium on which a computer program is stored. When the computer program is executed by a processor, it implements the channel occupancy information indication method described above.

[0016] Further details regarding the above embodiments and other aspects of this application, as well as their implementations, are provided in the accompanying drawings, detailed description, and claims. Attached Figure Description

[0017] Figure 1 A flowchart illustrating a channel occupancy information indication method as provided in one embodiment;

[0018] Figure 2 An example flowchart of a channel occupancy information indication method provided in one embodiment;

[0019] Figure 3 A schematic diagram of a first physical channel provided in one embodiment;

[0020] Figure 4 A schematic diagram of the first physical channel transmission timing provided in one embodiment;

[0021] Figure 5 A schematic diagram illustrating the mapping relationship between the frequency domain location of the first physical channel and the sub-channels, provided in one embodiment;

[0022] Figure 6 A schematic diagram illustrating the positional relationship of a first physical channel, a second physical channel, and a third physical channel as provided in one embodiment;

[0023] Figure 7 This is a schematic diagram illustrating another positional relationship between the first physical channel, the second physical channel, and the third physical channel provided in one embodiment.

[0024] Figure 8 A schematic diagram of a target time slot set provided in one embodiment;

[0025] Figure 9 A flowchart of another channel occupancy information indication method provided in one embodiment;

[0026] Figure 10 Example flowchart of another channel occupancy information indication method provided in one embodiment;

[0027] Figure 11 This is a schematic diagram of a second terminal receiving a first physical channel according to an embodiment;

[0028] Figure 12 A schematic diagram of a channel occupancy information indication device provided in one embodiment;

[0029] Figure 13 A schematic diagram of another channel occupancy information indication device provided in one embodiment;

[0030] Figure 14 A schematic diagram of the hardware structure of a first communication terminal provided in one embodiment;

[0031] Figure 15 This is a schematic diagram of the hardware structure of a second communication terminal provided in one embodiment. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of this application clearer, the embodiments of this application will be described in detail below with reference to the accompanying drawings. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be arbitrarily combined with each other.

[0033] The steps illustrated in the flowchart in the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions. Furthermore, although a logical order is shown in the flowchart, in some cases the steps shown or described may be performed in a different order than that presented here.

[0034] In sidelink communication systems, when user equipment (UE) needs to transmit services, the services between UEs do not pass through the network side, i.e., they do not go through the cellular link between the UE and the base station for forwarding. Instead, the data source UE transmits directly to the target UE through the sidelink. This direct UE-to-UE communication mode has characteristics that are significantly different from traditional cellular system communication modes. Typical applications of sidelink communication include device-to-device (D2D) communication and vehicle-to-everything (V2X) communication. Among them, V2X communication includes vehicle-to-vehicle (V2V), vehicle-to-pedestrian (V2P), and vehicle-to-infrastructure (V2I). For short-range communication users who can apply sidelink communication, it not only saves radio spectrum resources but also reduces the data transmission pressure on the core network, reduces system resource consumption, increases the spectrum efficiency of cellular communication systems, reduces communication latency, and significantly saves network operating costs.

[0035] Current sidelink communication designs only consider the ITS (Intelligent Transport System) spectrum and the licensed spectrum allocated to network operators, neglecting the design for unlicensed spectrum. In existing sidelink communication, a time slot can contain several sidelink channels, including the Physical Sidelink Control Channel (PSCCH), the Physical Sidelink Shared Channel (PSSCH), and the Physical Sidelink Feedback Channel (PSFCH). Additionally, a time slot may also include Orthogonal Frequency Division Multiplexing (OFDM) symbols where no sidelink channels are transmitted for the entire symbol.

[0036] In unlicensed spectrum, information transmission is only permitted on channels where a successful Listen Before Talk (LBT) protocol is established. LBT means that communication nodes must compete for resources; only after successfully acquiring a time-frequency resource can the node transmit information on that resource. More specifically, in the LBT mechanism, a communication node performs a channel access procedure before transmitting information; only after successful channel access can the node transmit information. As a typical channel access mechanism, the LBT mechanism allows communication terminals to occupy a channel after performing this procedure.

[0037] For a communication node that successfully completes LBT (Low-Time Bypass), it can occupy a channel for a certain period of time, known as the channel occupied time (COT). A certain bandwidth of time-frequency resources within the COT is considered a resource that the communication node has obtained and is permitted to use through the LBT listening mechanism. This bandwidth of time-frequency resources within the COT can be used by the communication node that successfully completed LBT, or the LBT-successful communication node can share the COT with other communication nodes. Other UEs that successfully share the COT can use the shared bandwidth of time-frequency resources within the COT.

[0038] Regarding the aforementioned COT sharing, the current standard protocol only supports COT sharing on the Uu interface and does not support COT sharing on the side links.

[0039] To solve the above technical problems, Figure 1 A flowchart of a channel occupancy information indication method provided in one embodiment is shown below. Figure 1 As shown, the method provided in this embodiment can be applied to a first communication terminal, including steps 110 and 120.

[0040] In step 110, shared channel occupancy information is determined, which includes shared channel occupancy time information.

[0041] In this embodiment, the first communication terminal can be a sidelink technology communication terminal. In unlicensed spectrum, the communication terminal needs to perform a channel access procedure, i.e., a channel occupancy assessment procedure, before it can use a channel belonging to the unlicensed spectrum for information transmission. Determining shared channel occupancy information requires the first communication terminal to perform a channel access procedure. A successfully accessed channel is a usable channel. After successful channel access, the first communication terminal can perform sidelink transmission on one or more usable channels. Here, an usable channel can refer to a carrier or a portion of a carrier consisting of a set of consecutive resource blocks.

[0042] This embodiment does not specifically limit how to determine the shared channel occupancy information. The shared channel occupancy information can be determined based on the channel occupied by the first communication terminal, i.e., the channel occupancy. The shared channel occupancy information can be information indicating shared channel occupancy. Shared channel occupancy can be understood as sharing all or part of the channel occupancy with other communication terminals.

[0043] In this embodiment, the shared channel occupancy information may include shared channel occupancy time information and shared channel occupancy start time; the shared channel occupancy information may also include frequency domain resource information and channel access priority, etc. The shared channel occupancy time information can be understood as the duration for which the first communication terminal occupies the channel, i.e., COT, or it can be understood as the duration for which the first communication terminal can occupy the channel within the COT.

[0044] In step 120, resource mapping of the first physical channel is performed, and the resource elements mapped by the first channel on the first target symbol are copied to the preceding orthogonal frequency division multiplexing symbol adjacent to the first target symbol.

[0045] In this embodiment, the first physical channel is used to indicate the shared channel occupancy information, and the first target symbol is an orthogonal frequency division multiplexing symbol within one time slot of the first physical channel.

[0046] In this embodiment, the first physical channel can be understood as a physical sidelink channel used to send shared channel occupancy information.

[0047] In this embodiment, the resource mapping of the first physical channel may include copying the resource element mapped to the first channel on the first target symbol to the preceding orthogonal frequency division multiplexing (OFDM) symbol adjacent to the first target symbol. This can be understood as the first physical channel being mapped to at least two OFDM symbols, and including these two OFDM symbols.

[0048] In this embodiment, the first physical channel occupies several resource elements in L orthogonal frequency division multiplexing (OFDM) symbols within one time slot. The resource elements mapped by the channel on the second OFDM symbol are copied to the preceding OFDM symbol immediately adjacent to the second OFDM symbol. Where L is greater than or equal to 2.

[0049] In step 130, the first physical channel is sent to at least one second communication terminal.

[0050] In this embodiment, the second communication terminal can be a communication terminal using sidelink technology. The first communication terminal can send the first physical channel to multiple communication terminals, so that the multiple communication terminals can share channel occupancy. The first communication terminal indicates the shared channel occupancy information to other communication terminals by sending the first physical channel, so that other communication terminals can use the channel determined by the shared channel occupancy information to send sidelink information.

[0051] In this embodiment, the first communication terminal sending the first physical channel can be understood as the first terminal mapping the generated sequence onto physical resources, and then sending the sequence generated by the first communication terminal onto the mapped physical resources. The sequence generated by the first communication terminal can be understood as the sequence corresponding to the first physical channel.

[0052] In this embodiment, there are no specific restrictions on how the first physical channel is sent to at least one second communication terminal.

[0053] In this embodiment, after the first communication terminal preempts the channel, it sends a first physical channel to the second communication terminal. The first physical channel indicates shared channel occupancy information, enabling the second communication terminal to share the channel preempted by the first communication terminal. This improves the success rate of channel access for the second communication terminal and effectively solves the problem of low channel access success rate for communication terminals using sidelink technology.

[0054] The following describes the transmission method on the first communication terminal side through different embodiments.

[0055] In one example embodiment, the first terminal, i.e. the first communication terminal, performs a channel access process; through the channel access process, the first terminal determines the available channel occupancy and the Channel Occupancy information, which includes the COT (Channel Occupancy Time) information.

[0056] After the first terminal determines the Channel Occupancy information, it sends the determined Channel Occupancy information to other terminals. Other terminals that receive the shared Channel Occupancy information can use the channel determined by the Channel Occupancy information to send sidelink information.

[0057] The first terminal transmits a first physical channel to indicate to other terminals that it is sharing Channel Occupancy information. The Channel Occupancy information includes COT information. The first physical channel may include the following characteristics:

[0058] The first physical channel occupies several resource elements in L orthogonal frequency division multiplexing (OFDM) symbols within a time slot. The resource elements mapped by the target channel on the second OFDM symbol are copied to the preceding OFDM symbol immediately adjacent to the second OFDM symbol, where L is greater than or equal to 2.

[0059] Figure 2 An example flowchart of a channel occupancy information indication method provided in one embodiment is shown below. Figure 2 As shown, the process includes the following steps: Step 1, performing the channel access procedure; Step 2, determining channel occupancy information; Step 3, sending the first physical channel, which is used to indicate shared Channel Occupancy information.

[0060] The first terminal performs a channel access procedure, assessing the availability of one or more channels. Channel availability here refers to whether the first terminal can transmit on one or more channels. A channel can refer to a carrier or a portion of a carrier consisting of a set of consecutive resource blocks (RBs). When the assessment result indicates that one or more channels are available, it means that the first terminal can occupy those channels, i.e., the first terminal can perform sidelink transmission on those channels. The first terminal determines channel occupancy information. The time during which the first terminal can occupy one or more channels when it assesses their availability is called the Channel Occupancy Time (COT). Within the COT, the first terminal can occupy the channel. The channel occupancy information determined by the first terminal, in addition to COT information, may also include the COT start time, the set of available resource blocks, and CAPC information (channel access priority information). The set of available resource blocks limits the frequency domain range of the channels occupied by the first terminal. The first terminal transmits the first physical channel, which is used to transmit channel occupy information. After obtaining channel occupancy, the first terminal shares all or part of the channel occupancy with other terminals; this shared channel occupancy is called shared channel occupancy.

[0061] The first terminal transmits information indicating shared channel occupation via a first physical channel. This shared channel occupation information may include the shared Channel Occupancy Time (COT), such as the COT duration and COT start time. The shared channel occupation information may also include the COT start time, available resource block set, frequency domain resource allocation information, and CAPC information. The available resource block set limits the frequency domain range occupied by the shared channel, and the frequency domain resource allocation information determines the frequency domain resources allocated to other terminals within the available resource block set. The CAPC information can be used by other terminals sharing the channel occupation to determine information such as the COT. Table 1 shows the relationship between channel access priority and shared channel occupation time in one embodiment. As shown in Table 1, when the channel access priority is 1, the shared channel occupation time is 2ms; when the channel access priority is 2, the shared channel occupation time is 3ms; and when the channel access priority is 3 or 4, the shared channel occupation time is 8ms or 10ms.

[0062] Table 1

[0063] Channel access priority (p) Shared channel occupancy time 1 2ms 2 3ms 3 8ms or 10ms 4 8ms or 10ms

[0064] The first physical channel transmitted by the first terminal includes the following characteristics: the first physical channel occupies several resource elements in L orthogonal frequency division multiplexing (OFDM) symbols within one time slot, and copies the resource elements mapped to the target channel on the second OFDM symbol to the preceding OFDM symbol immediately adjacent to the second OFDM symbol. Wherein, L is greater than or equal to 2.

[0065] Figure 3 This is a schematic diagram of a first physical channel provided in one embodiment. When L=2, the first physical channel is as follows: Figure 3 As shown, in Figure 3 In this process, the first physical channel is located on OFDM symbols numbered 11 and 12 within a time slot. Specifically, the resource element mapped to the first physical channel on the second OFDM symbol is copied to the preceding adjacent OFDM symbol, thereby determining the modulation symbol mapped to the resource element mapped to the first symbol on the first physical channel.

[0066] In one example embodiment, a first communication terminal transmits a first physical channel to indicate to other communication terminals the sharing of Channel Occupancy information, which includes COT information. Resource mapping of the first physical channel by the first communication terminal may include mapping the first physical channel to L = 2 OFDM symbols, specifically mapping the first physical channel to the second-to-last OFDM symbol within a time slot n.

[0067] In unlicensed spectrum, communication requires a channel access procedure before a communication node can use a channel belonging to the unlicensed spectrum for information transmission. To allow a second communication terminal to use a channel belonging to the unlicensed spectrum for information transmission, besides the second communication terminal itself performing a channel access procedure to preempt the channel, the first communication terminal can also assist in preempting the channel. The first communication terminal performs a channel access procedure before transmitting the first physical channel, thereby preempting the channel. After preempting the channel, in time slot n, it occupies the channel by transmitting the first physical channel. Simultaneously, the first communication terminal sends a shared channel occupancy information by transmitting the first physical channel, sharing the preempted channel with the second communication terminal. After the first communication terminal shares its preempted channel with the second communication terminal, the second communication terminal can use the channel indicated as shared by the first communication terminal for sidelink channel and / or sidelink signal transmission within time slot n+1.

[0068] Between the first OFDM symbol in time slot n+1 and the first physical channel, there is another OFDM symbol. To prevent the channel from being preempted by other communication nodes during this period, the first communication terminal can transmit a sidelink channel and / or sidelink signal on this symbol.

[0069] In one embodiment, the first physical channel occupies at least two orthogonal frequency division multiplexing (OFDM) symbols within one time slot, and the first target symbol includes the second OFDM symbol among the at least two OFDM symbols.

[0070] In this embodiment, the first target symbol may include the second orthogonal frequency division multiplexing symbol among at least two orthogonal frequency division multiplexing symbols occupied in one time slot of the first physical channel.

[0071] In one embodiment, the first physical channel includes a physical sidelink feedback channel.

[0072] In this embodiment, the first physical channel may include a physical sidelink feedback channel within one time slot. The first physical channel may be a physical sidelink feedback channel used to indicate channel occupancy information.

[0073] In one embodiment, before sending the first physical channel to at least one second communication terminal, the method further includes: receiving a physical sidelink shared channel sent by at least one second communication terminal; and determining the channel resources of the first physical channel based on the mapping relationship between the first physical channel and the sidelink shared channel.

[0074] Channel resources include one or more of the following: time-domain resources; frequency-domain resources. In this embodiment, the mapping relationship between the first physical channel and the side-link shared channel may include one or more of the following: in the time domain, a mapping relationship between the transmission timing of the first physical channel and the transmission timing of at least one side-link shared channel; in the time domain, a mapping relationship between the transmission timing of the first physical channel and at least one side-link shared channel; in the frequency domain, a mapping relationship between the frequency domain position of the first physical channel and the sub-channel. The transmission timing of the first physical channel can be understood as the time-domain opportunity to transmit the first physical channel; the transmission timing of the side-link shared channel can be understood as the time-domain opportunity to transmit the side-link shared channel.

[0075] In one example embodiment, a first communication terminal sends a first physical channel to at least one second communication terminal. By sending the first physical channel, channel occupancy information, including COT information, is indicated to other terminals. The first physical channel is located on the penultimate and penultimate symbols of a time slot. There is a mapping relationship between the first physical channel and the PSSCH (Plan-Side Shared Channel). The first communication terminal receives the PSSCH sent by the second communication terminal and determines the time domain and / or frequency domain resources of the first physical channel based on the mapping relationship between the first physical channel and the PSSCH.

[0076] The mapping relationship between the first physical channel and the side link shared channel may include at least one of the following:

[0077] In the time domain, the first physical channel transmission timing is mapped to at least one candidate PSSCH transmission, i.e., the side link shared channel transmission timing.

[0078] In the time domain, the first physical channel transmission is mapped to the timing of at least one candidate PSSCH transmission.

[0079] In the frequency domain, there is a mapping relationship between the frequency domain location of the first physical channel and the sub-channel.

[0080] In one embodiment, in the time domain, the first physical channel transmission timing is mapped to at least one PSSCH transmission timing, i.e., the side link shared channel transmission timing, which can also be called the candidate side link shared channel transmission timing.

[0081] Figure 4 This is a schematic diagram of the first physical channel transmission timing provided in one embodiment. Figure 4 There are 11 PSSCH transmission opportunities. Figure 4 In this context, each first physical channel transmission opportunity includes two OFDM symbols, specifically the penultimate and penultimate OFDM symbols within a time slot. Each first physical channel transmission opportunity may include one or more time-frequency resources available for transmitting the first physical channel. One first physical channel transmission opportunity maps to at least one PSSCH transmission opportunity. Mapping one first physical channel transmission opportunity to N PSSCH transmission opportunities means that one first physical channel transmission opportunity includes one or more frequency domain resources available for transmitting the first physical channel, each of which maps to one PSSCH transmission opportunity. A time slot includes all of the frequency domain resources available for transmitting the first physical channel, resulting in a total of N PSSCH transmission opportunities mapped. Figure 4 In this diagram, each first physical channel transmission opportunity is mapped to N = 4 PSSCH transmission opportunities that are greater than a time threshold. The first physical channel transmission opportunity corresponding to time slot 6 is mapped to the 4 PSSCH transmission opportunities corresponding to time slots {1,2,3,4}. The first physical channel transmission opportunity corresponding to time slot 10 is mapped to the 4 PSSCH transmission opportunities corresponding to time slots {5,6,7,8}. The first terminal receives the PSSCH sent by the second terminal, and based on the mapping relationship between the first physical channel and PSSCH transmission opportunities described above, it can determine the timing of the first physical channel transmission.

[0082] In one embodiment, in the time domain, a first physical channel transmission is mapped to at least one candidate PSSCH transmission opportunity. Mapping a first physical channel transmission to N candidate PSSCH transmission opportunities means that one first physical channel or one time-frequency resource available for first physical channel transmission is mapped to N candidate PSSCH transmission opportunities. The first terminal receives the PSSCH sent by the second terminal and determines the timing of the first physical channel transmission based on the mapping relationship between the first physical channel and PSSCH transmission opportunities described above.

[0083] In one embodiment, a mapping relationship exists between the frequency domain location of the first physical channel and sub-channels. A sub-channel is a frequency domain resource unit, and a sub-channel includes several resource blocks. Time slot n includes a transmission opportunity for the first physical channel, which includes one or more frequency domain resources available for transmitting the first physical channel. Each frequency domain resource available for transmitting the first physical channel has a mapping relationship with a sub-channel.

[0084] Figure 5 This is a schematic diagram illustrating the mapping relationship between the frequency domain location of a first physical channel and sub-channels, provided in one embodiment. Figure 5 In this context, the first physical channel is the PSFCH, used to indicate channel occupancy information. Within time slot n, the frequency domain resources available for transmitting the first physical channel include four sets of resources, each set containing two frequency domain resources usable for the first physical channel transmission. These four sets of resources are numbered f... 1,1 ,f 2,1 ,f 1,2 ,f 2,2 The time slots nK-1 and nK include four sub-channels, numbered t and t respectively. 1,1 ,t 2,1 ,t 1,2 ,t 2,2 Among them, the one numbered f 1,1 The resource group with the number t 1,1 The sub-channels have a mapping relationship; numbered f 2,1 The resource group with the number t 2,1 The sub-channels have a mapping relationship; numbered f 1,2 The resource group with the number t 1,2 The sub-channels have a mapping relationship; numbered f 2,2 The resource group with the number t 2,2 The sub-channels have a mapping relationship. The first terminal receives the PSSCH sent by the second terminal, and determines the time-frequency resources transmitted on the first physical channel according to the mapping relationship between the first physical channel and the sub-channels described above. For example, the PSSCH sent by the second terminal to the first terminal is located in slot n+K-1 and numbered t. 1,1 and t 1,2 The first terminal can determine the frequency domain resources of the first physical channel based on the first sub-channel among the multiple sub-channels corresponding to the PSSCH. That is, the first terminal determines the frequency domain resources of the first physical channel based on the number t. 1,1 The sub-channels can determine the frequency domain resources of the first physical channel as the f-th sub-channels. 1,1 A frequency domain resource within a group of frequency domain resources.

[0085] In one embodiment, the time-frequency resources of the first physical channel overlap with those of the physical sidelink feedback channel used to indicate acknowledgment or negative acknowledgment information, and the cyclic shift of the sequence corresponding to the first physical channel is different from the cyclic shift of the sequence corresponding to the physical sidelink feedback channel.

[0086] In this embodiment, when the physical resources mapped by the first physical channel are the same as the time-frequency resources of the physical sidelink feedback channel used to indicate acknowledgment information or negative acknowledgment information, the sequence corresponding to the first physical channel has a different cyclic shift compared to the sequence corresponding to the physical sidelink feedback channel used to indicate acknowledgment information or negative acknowledgment information.

[0087] In this embodiment, after the first communication terminal sends the first physical channel to the second communication terminal, the second communication terminal can distinguish whether it is the first physical channel or a physical sidelink feedback channel used to indicate confirmation information or negative confirmation information based on the cyclic shift of the received sequence.

[0088] In one embodiment, the time-frequency resources of the first physical channel overlap with those of the physical sidelink feedback channel used to indicate conflict information, and the cyclic shift of the sequence corresponding to the first physical channel is different from the cyclic shift of the sequence corresponding to the physical sidelink feedback channel.

[0089] In this embodiment, when the physical resources mapped by the first physical channel are the same as the time-frequency resources of the physical sidelink feedback channel used to indicate conflict information, the cyclic shift of the sequence corresponding to the first physical channel is different from that of the sequence corresponding to the physical sidelink feedback channel used to indicate conflict information.

[0090] In this embodiment, after the first communication terminal sends the first physical channel to the second communication terminal, the second communication terminal can distinguish between the first physical channel and the physical sidelink feedback channel used to indicate conflict information based on the cyclic shift of the received sequence. Conflict information can be understood as conflict information of time-frequency resources.

[0091] In one embodiment, the first physical channel simultaneously indicates a hybrid automatic retransmission acknowledgment and a channel occupancy enable message.

[0092] In this embodiment, the first physical channel is sent simultaneously to indicate the hybrid automatic retransmission acknowledgment information and the channel occupancy enable information.

[0093] In this embodiment, the hybrid automatic retransmission acknowledgment (ART) information can include both positive and negative acknowledgment states. Channel occupancy enable information can be understood as COT enable information, or as channel occupancy activation information; channel occupancy enable information can include two types of information: channel occupancy enabled and channel occupancy disabled, or channel occupancy time enabled and channel occupancy time disabled. Channel occupancy enable and information occupancy time enable indicate that the first communication terminal shares the channel occupied through the channel access process with other communication terminals.

[0094] In one embodiment, the sequence cyclic shift of the sequence corresponding to the first physical channel is mapped to at least one of the following information:

[0095] Negative acknowledgment and channel occupancy enabled; negative acknowledgment and channel occupancy disabled; positive acknowledgment and channel occupancy enabled; positive acknowledgment and channel occupancy disabled.

[0096] In this embodiment, the first physical channel corresponds to a sequence, and the sequence cyclic shift corresponding to this sequence belongs to one of four sequence cyclic shifts. These four sequence cyclic shifts are respectively mapped to negative acknowledgment and channel occupancy enabled, negative acknowledgment and channel occupancy disabled, positive acknowledgment and channel occupancy enabled, and positive acknowledgment and channel occupancy disabled.

[0097] In one example embodiment, a first terminal transmits a first physical channel to indicate to other terminals that channel occupancy information is being shared. The channel occupancy information includes COT information. The first physical channel includes at least one of the following:

[0098] The first physical channel and the PSFCH (physical side link feedback channel), which is used to indicate ACK / NACK information (i.e., positive acknowledgment information or negative acknowledgment information), have overlapping time-frequency resources. The cyclic shift of the sequence corresponding to the first physical channel is different from the cyclic shift of the sequence corresponding to the PSFCH.

[0099] The first physical channel and the PSFCH used to indicate collision information have overlapping time-frequency resources, and the cyclic shift of the sequence corresponding to the first physical channel is different from the cyclic shift of the sequence corresponding to the PSFCH.

[0100] Before transmitting through the first physical channel, the first terminal generates a sequence. This sequence can be understood as a set of data or modulation symbols arranged in a specific order according to certain rules. The first terminal generates a sequence before transmitting through the first physical channel, which may have a cyclic shift. Assuming a sequence A of length N = 10 is [1,2,3,4,5,6,7,8,9,10], then the sequence B after cyclically shifting A by 2 is [9,10,1,2,3,4,5,6,7,8], or the sequence B after cyclically shifting A by 2 is [3,4,5,6,7,8,9,10,1,2].

[0101] The first terminal maps the generated sequence to physical resources, and then transmits the generated sequence on the mapped physical resources. This can be referred to as the first terminal transmitting a first physical channel. The generated sequence is the sequence corresponding to the first physical channel. The time-frequency resources of the first physical channel are the physical resources mapped to the sequence corresponding to the first physical channel.

[0102] When the physical resources mapped to the first physical channel are the same as the time-frequency resources of the PSFCH used to indicate ACK / NACK information, the sequence corresponding to the first physical channel has a different cyclic shift compared to the sequence corresponding to the PSFCH used to indicate ACK / NACK information. After the first terminal sends the first physical channel, the second terminal distinguishes between the first physical channel and the PSFCH used to indicate ACK / NACK information based on the cyclic shift of the received sequence.

[0103] When the physical resources mapped by the first physical channel are the same as the time-frequency resources of the PSFCH used to indicate collision information, the sequence corresponding to the first physical channel has a different cyclic shift compared to the sequence corresponding to the PSFCH used to indicate collision information. After the first terminal sends the first physical channel, the second terminal distinguishes between the first physical channel and the PSFCH used to indicate collision information based on the cyclic shift of the received sequence.

[0104] In one example embodiment, the first terminal simultaneously indicates HARQ-ACK information and channel occupancy enable information by transmitting a first physical channel. The channel occupancy enable information can also be called COT enable information or channel occupancy activation information. The HARQ-ACK information can include two states: ACK and NACK. The channel occupancy enable information can include two types of information: channel occupancy enabled and channel occupancy disabled; alternatively, the channel occupancy enable information can include two types of information: channel occupancy time enabled and channel occupancy time disabled. Enabling channel occupancy or enabling channel occupancy time means that the first terminal shares the channel determined through the channel access procedure with other terminals.

[0105] The first physical channel corresponds to a sequence, and the cyclic shift of this sequence belongs to one of four cyclic shift sequences. These four cyclic shift sequences are mapped to the following four pieces of information:

[0106] ACK, channel occupancy enable, is both affirmative acknowledgment and channel occupancy enable;

[0107] NACK, channel occupancy enable, is both negative acknowledgment and channel occupancy enable;

[0108] ACK, channel occupancy disabled, is both affirmative acknowledgment and channel occupancy disabled;

[0109] NACK, which means channel occupancy is disabled, is equivalent to negative acknowledgment and channel occupancy is disabled.

[0110] In one embodiment, the first communication terminal and at least one second communication terminal belong to the same user group.

[0111] In this embodiment, the fact that the first communication terminal and the second communication terminal belong to the same user group means that the channel occupied by the first communication terminal can only be shared with the second communication terminal within the same user group.

[0112] In one embodiment, when at least one second communication terminal includes a second communication terminal, the first communication terminal sends a first physical channel to the second communication terminal via unicast.

[0113] In this embodiment, the first communication terminal sends a first physical channel to at least one second communication terminal. When the at least one second communication terminal includes only one second communication terminal, it indicates that the first communication terminal and the second communication terminal have established a unicast communication connection. The first communication terminal can only preempt the channel for the second communication terminal with the unicast communication connection and notify the shared channel occupancy information. Unicast mode can be understood as a point-to-point transmission mode.

[0114] In one embodiment, a first physical channel is used to indicate cooperation information, which includes shared channel occupancy time.

[0115] In this embodiment, the first communication terminal sends a first physical channel to at least one second communication terminal, and indicates cooperation information through the first physical channel. The cooperation information may include the shared channel occupancy time.

[0116] In this embodiment, after the first communication terminal preempts the channel, it can share the preempted channel with other communication terminals. Here, regardless of whether other communication terminals have established a communication connection with the first communication terminal or belong to the same user group as the first communication terminal, the second communication terminal that receives the first physical channel sent by the first communication terminal can use the channel preempted by the first communication terminal, that is, the channel shared by the first communication terminal with the second communication terminal.

[0117] In one example embodiment, the first terminal transmits a first physical channel to indicate to other terminals that channel occupancy information is being shared. The channel occupancy information includes COT information. The first terminal transmits the first physical channel to at least one UE, i.e., at least one second communication terminal, including at least one of the following:

[0118] The first terminal sends a first physical channel to at least one UE, and the first terminal and the at least one UE belong to the same UE group;

[0119] The first terminal sends a first physical channel to at least one UE, wherein the at least one UE includes only the second terminal, and the first terminal sends the first physical channel to the second UE via unicast.

[0120] A first terminal sends a first physical channel to at least one UE, indicating cooperation information through the first physical channel, the cooperation information including COT information.

[0121] The first terminal assists other terminals in seizing the channel. To seize the channel, the first terminal executes a channel access procedure. The first terminal successfully seizing the channel by accessing it through this procedure. The first terminal then transmits information indicating the channel occupancy by sending a first physical channel signal.

[0122] The second terminal determines Channel Occupancy information by receiving the first physical channel sent by the first terminal. This Channel Occupancy information is used by the second terminal to determine the parameters for using the corresponding channel (preempting the channel). The Channel Occupancy information may include the COT duration, COT start time, and which channel(s) are preempting the channel(s).

[0123] When the first terminal and the second terminal belong to the same UE group, i.e. the same user group, it means that the channel occupied by the first terminal can only be shared with UEs within the same UE group.

[0124] The first terminal sends a first physical channel to at least one UE. When the at least one UE includes only the second terminal, it means that the first terminal and the second terminal establish a unicast communication connection. The first terminal can only preempt the channel for UEs with a unicast communication connection relationship and notify the parameters of the channel occupancy (shared channel) corresponding to the preempted channel.

[0125] A first terminal sends a first physical channel to at least one UE, indicating cooperation information through the first physical channel. This means that after the first terminal preempts a channel, it can share the preempted channel with other UEs, regardless of whether these UEs have established a communication connection with the first terminal or belong to the same UE group as the first terminal. UEs that receive the first physical channel sent by the first terminal can use the channel preempted by the first terminal (the shared channel).

[0126] In one embodiment, the first communication terminal transmits a first physical channel, a second physical channel, and a third physical channel in the same time slot;

[0127] The time corresponding to the first physical channel includes the second target symbol, which includes at least two orthogonal frequency division multiplexing symbols in the same time slot;

[0128] The time corresponding to the second physical channel and the third physical channel is earlier than the time corresponding to the first physical channel;

[0129] The last orthogonal frequency division multiplexing (OFDM) symbol of the third physical channel is spaced between the first orthogonal frequency division multiplexing (OFDM) symbol of the first physical channel and the last OFDM symbol of the third physical channel by zero or one OFDM symbol.

[0130] In this embodiment, the first communication terminal can also send a second physical channel and a third physical channel. The first communication terminal sending the second physical channel and the third physical channel and the first communication terminal sending the first physical channel are in the same time slot.

[0131] In this embodiment, the second target symbol may include two orthogonal frequency division multiplexing (OFDM) symbols, which may be the penultimate and penultimate OFDM symbols in the same time slot.

[0132] In this embodiment, the orthogonal frequency division multiplexing (OFDM) symbols in the same time slot occupied by the second physical channel and the third physical channel are located before the OFDM symbols in the same time slot occupied by the first physical channel.

[0133] In this embodiment, the orthogonal frequency division multiplexing (OFDM) symbols in the same time slot occupied by the third physical channel are spaced apart by zero or one OFDM symbol from the first OFDM symbol in the same time slot occupied by the first physical channel.

[0134] In this embodiment, the side link control information located on the second physical channel includes a first part of the shared channel occupancy time information; the first physical channel is used to indicate the second part of the shared channel occupancy time information.

[0135] In this embodiment, the first communication terminal can indicate the shared channel occupancy information in one of the following ways:

[0136] The first communication terminal sends sidelink control information that does not include shared channel occupancy information, by indicating shared channel occupancy information through a first physical channel; and sends sidelink control information by sending a physical sidelink control channel, wherein the sidelink control information may include a first part of the shared channel occupancy time information, and sends the first physical channel, wherein the first physical channel is used to indicate a second part of the shared channel occupancy time information.

[0137] In this embodiment, the first part of the shared channel occupancy time information may include one or more of the following:

[0138] The duration of channel occupancy; the set of available resource blocks corresponding to the shared channel; and the channel access priority.

[0139] In this embodiment, the second part of the shared channel occupancy time information may include one or more of the following:

[0140] Channel occupancy start time; enabling shared channel occupancy; opening shared channel occupancy; enabling COT corresponding to shared channel; opening COT corresponding to shared channel.

[0141] In one example embodiment, the first terminal sends a first physical channel to indicate to other terminals that channel occupancy information is being shared, and the channel occupancy information includes COT information.

[0142] Furthermore, the first terminal transmits PSCCH and PSSCH. The PSCCH / PSSCH transmitted by the first terminal and the first physical channel transmitted by the first terminal may be located in the same time slot n, including: the time corresponding to the first physical channel, including at least two orthogonal frequency division multiplexing symbols in time slot n; the PSCCH and PSSCH are located before the first physical channel, and the last orthogonal frequency division multiplexing symbol of the PSSCH is spaced between the first orthogonal frequency division multiplexing symbol of the first physical channel and the first orthogonal frequency division multiplexing symbol of the first physical channel by zero or one orthogonal frequency division multiplexing symbol.

[0143] Figure 6 This is a schematic diagram illustrating the positional relationship of a first physical channel, a second physical channel, and a third physical channel as provided in one embodiment. Figure 6In this structure, the first physical channel occupies OFDM symbols numbered 11 and 12 in time slot n. OFDM symbols numbered 1 to 9 in time slot n include the PSCCH and PSSCH transmitted by the first terminal. The second physical channel PSCCH can be mapped to OFDM symbols numbered 1 and 2, and also to OFDM symbols numbered 1, 2, and 3. Among the multiple OFDM symbols mapped by the third physical channel PSSCH, the last OFDM symbol is OFDM symbol number 9. The last symbol of the PSSCH (OFDM symbol number 9) is separated from the first symbol of the first physical channel (OFDM symbol number 11) by an OFDM symbol numbered 10.

[0144] The first terminal uses one of the following methods to indicate shared channel occupancy information:

[0145] Method 1: The shared channel occupancy information is indicated through the first physical channel. The SCI (Side Link Control Information) sent by the first terminal does not include the shared channel occupancy information.

[0146] Method 2, the methods by which the first terminal indicates shared channel occupancy information include:

[0147] The first terminal sends SCI by sending PSCCH, and the SCI includes the first part of information in COT shared information;

[0148] The first terminal transmits the first physical channel, which is used to indicate the second part of the COT shared information.

[0149] In one embodiment, the first communication terminal transmits a first physical channel in a first time slot, and the first communication terminal transmits a second physical channel and a third physical channel in a second time slot;

[0150] The first time slot and the second time slot belong to the same target time slot set. The first time slot and the second time slot are adjacent time slots in the target time slot set, and the first time slot is earlier than the second time slot. The target time slot set is the time slot set corresponding to a side link resource pool.

[0151] In this embodiment, the first communication terminal can transmit the first physical channel, the second physical channel, and the third physical channel in different time slots, and the second physical channel and the third physical channel can be transmitted in the same time slot. A sidelink resource pool refers to a set of time-domain resources that can be used for sidelink communication, or a set of time-frequency resources that can be used for sidelink communication.

[0152] In this embodiment, the first communication terminal transmits a first physical channel on at least two orthogonal frequency division multiplexing symbols in the first time slot; the first communication terminal transmits a second physical channel starting from the first orthogonal frequency division multiplexing symbol in the second time slot or starting from the second orthogonal frequency division multiplexing symbol in the second time slot.

[0153] In this embodiment, the first communication terminal can transmit the first physical channel on at least two orthogonal frequency division multiplexing symbols in the first time slot.

[0154] In this embodiment, the first communication terminal can transmit the second physical channel in the second time slot, starting from the first orthogonal frequency division multiplexing symbol of the second time slot, or starting from the second orthogonal frequency division multiplexing symbol of the second time slot.

[0155] In this embodiment, the first physical channel is used to indicate the first part of the shared channel occupancy time information; the side link control information on the second physical channel includes the second part of the shared channel occupancy time information.

[0156] In this embodiment, the first communication terminal can indicate the shared channel occupancy information in one of the following ways:

[0157] The first communication terminal sends sidelink control information that does not include shared channel occupancy information, by indicating shared channel occupancy information through a first physical channel; and sends sidelink control information by sending a physical sidelink control channel, wherein the sidelink control information may include a second part of the shared channel occupancy time information, and sends the first physical channel, wherein the first physical channel is used to indicate a first part of the shared channel occupancy time information.

[0158] In this embodiment, the first part of the shared channel occupancy time information may include one or more of the following:

[0159] The duration of channel occupancy; the set of available resource blocks corresponding to the shared channel; and the channel access priority.

[0160] In this embodiment, the second part of the shared channel occupancy time information may include one or more of the following:

[0161] Channel occupancy start time; enabling shared channel occupancy; opening shared channel occupancy; enabling COT corresponding to shared channel; opening COT corresponding to shared channel.

[0162] The second physical channel includes the physical side link control channel; the third physical channel includes the physical side link shared channel.

[0163] In one embodiment, the second physical channel can be a physical side link control channel.

[0164] In one embodiment, the third physical channel can be a physical side link shared channel.

[0165] In one example embodiment, a first terminal transmits a first physical channel, which can be used to indicate shared Channel Occupancy information to other terminals. Channel Occupancy information includes shared COT information. The first terminal also transmits a PSCCH (a second physical channel) and a PSSCH (a third physical channel). The first terminal transmits the first physical channel in time slot n and the PSCCH and PSSCH in time slot m, including:

[0166] The first terminal transmits the first physical channel on at least two orthogonal frequency division multiplexing symbols in time slot n;

[0167] The PSCCH transmitted by the first terminal in time slot m starts from the first orthogonal frequency division multiplexing symbol in time slot m, or starts from the second orthogonal frequency division multiplexing symbol in time slot m.

[0168] Time slot n and time slot m belong to a target time slot set, are two adjacent time slots in the target time slot set, and time slot n is located before time slot m;

[0169] The target time set is a time slot set corresponding to a Sidelink resource pool.

[0170] Figure 7 This is a schematic diagram illustrating another positional relationship between the first physical channel, the second physical channel, and the third physical channel, as provided in one embodiment. Figure 7 In the first physical channel transmitted by the first terminal, the OFDM symbols occupied include OFDM symbols numbered 11 and 12 in time slot n. The first terminal also transmits PSCCH and PSSCH in time slot m. The PSCCH, starting from the second symbol in time slot m, maps to OFDM symbols numbered 1 and 2, or to OFDM symbols numbered 1, 2, and 3. The PSSCH maps to OFDM symbols numbered 3 to 13, or to OFDM symbols numbered 4 to 13, or to OFDM symbols numbered 1 to 13. Figure 7In time slot m, some modulation symbols mapped to OFDM symbol number 1 are copied to OFDM symbol number 0 in time slot m. Some time-domain information mapped to OFDM symbol number 1 in time slot m is copied to the last OFDM symbol in time slot n, or some time-domain information mapped to OFDM symbol number 12 in time slot n is copied to the last OFDM symbol in time slot n. Furthermore, time slots n and m belong to a target time slot set, which is the target time slot set composed of slots numbered {1,3,5,6,8,9,11,12, p,n,m,q}. The time slot set numbered {1,3,5,6,8,9,11,12, p,n,m,q} corresponds to a Sidelink resource pool. Figure 7 In this case, m = n + 1.

[0171] The first terminal uses one of the following methods to indicate shared channel occupancy information:

[0172] Method 1: The shared channel occupancy information is indicated through the first physical channel. The SCI (Side Link Control Information) sent by the first terminal does not include the shared channel occupancy information.

[0173] Method 2, the methods by which the first terminal indicates shared channel occupancy information include:

[0174] The first terminal sends SCI by sending PSCCH, and the SCI includes the second part of the COT shared information.

[0175] The first terminal transmits the first physical channel, which is used to indicate a first portion of information in the COT shared information.

[0176] In one embodiment, the shared channel occupancy information includes one or more of the following:

[0177] Channel occupancy duration; channel occupancy time; channel occupancy start time; frequency domain resource allocation; set of available resource blocks corresponding to the shared channel; channel access priority.

[0178] In this embodiment, the first communication terminal indicates shared channel occupancy information to at least one second communication terminal. The shared channel occupancy information may include one or more of the following: the duration of channel occupancy; the channel occupancy time; the start time of channel occupancy; frequency domain resource allocation; the set of available resource blocks corresponding to the shared channel; and the channel access priority.

[0179] In one embodiment, at least one communication terminal includes a second communication terminal, and correspondingly, when the first communication terminal transmits the first physical channel to the second communication terminal in the first time slot, one or more of the following conditions are met:

[0180] The first communication terminal received the side link control information sent by the second communication terminal in the third time slot, reserving time and frequency resources in the second time slot;

[0181] The first time slot and the second time slot belong to the same target time slot set. The first time slot and the second time slot are adjacent time slots in the target time slot set, and the first time slot is earlier than the second time slot.

[0182] The third time slot is earlier than the second time slot.

[0183] In this embodiment, the time domain resources reserved on the second time slot in the side link control information sent by the second communication terminal can be understood as at least a portion of the time and frequency resources indicated by the side link control information sent by the second communication terminal being located on the second time slot.

[0184] In this embodiment, the first time slot and the second time slot are two adjacent time slots in the target time slot set, with the first time slot preceding the second time slot. The second communication terminal reserves time-frequency resources on the second time slot through sidelink control information, aiming to allow the second communication terminal to use the reserved time-frequency resources on the second time slot to transmit sidelink channels and / or sidelink signals. However, since the channel belongs to unlicensed spectrum, a channel access procedure is required before the second communication terminal can use the reserved time-frequency resources on the second time slot to transmit sidelink channels and / or sidelink signals.

[0185] The second physical channel includes the physical side link control channel; the third physical channel includes the physical side link shared channel.

[0186] In one example embodiment, a first terminal transmits a first physical channel. The first terminal can use this first physical channel to indicate shared Channel Occupancy information to other terminals. The Channel Occupancy information includes shared COT information. The first terminal transmits the first physical channel to at least one terminal in time slot n (i.e., the first time slot), the at least one terminal including a second terminal. The conditions for the first terminal to transmit the first physical channel in time slot n include:

[0187] The SCI (Side Link Control Information) sent by the second terminal and received by the first terminal in time slot Q (i.e., the third time slot) reserves time and frequency resources in time slot m (i.e., the second time slot);

[0188] The time slot n and time slot m are two adjacent time slots in a target time slot set, and the time slot n is located before the time slot m.

[0189] The time slot Q is located before the time slot m.

[0190] Figure 8 A schematic diagram of the target time slot set provided in one embodiment, as shown below. Figure 8 As shown, time slot n and time slot m are two adjacent time slots in the target time slot set, with time slot n preceding time slot m. To increase the channel occupancy probability, besides the second terminal itself performing a channel access procedure to preempt the channel, the first terminal can also assist the second terminal in preempting the channel. The first terminal performs a channel access procedure before sending the first physical channel, thereby preempting the channel. After preempting the channel, the first terminal can occupy the channel by sending the first physical channel (to avoid being preempted by other communication nodes). Simultaneously, the first terminal can send the first physical channel to indicate channel occupancy information, sharing the preempted channel with the second terminal through this information (i.e., shared channel occupancy information). After receiving the first physical channel sent by the first terminal to indicate channel occupancy information, the second terminal determines some parameters for channel occupancy (i.e., shared channel occupancy information) and occupies or uses the channel preempted for it by the first terminal based on these parameters.

[0191] exist Figure 8 In this context, starting from the first OFDM symbol in time slot m, the second terminal can already use the channel preempted for it by the first terminal. Between the first OFDM symbol in time slot m and the first physical channel, there is another OFDM symbol. To avoid the channel being preempted by other communication nodes during this period, optionally, the first terminal can transmit a sidelink channel and / or shared signal on this symbol, thus preventing the channel from being preempted by other communication nodes during this time.

[0192] In one embodiment, the shared channel occupancy information includes one or more preset first channel occupancy information.

[0193] In this embodiment, the first channel occupancy information can be understood as one or more pre-set channel occupancy information. Since the first channel occupancy information is preset, one or more of the following included in the first channel occupancy information are preset: channel occupancy duration; channel occupancy time; channel occupancy start time; frequency domain resource allocation; set of available resource blocks corresponding to the shared channel; and channel access priority.

[0194] In this embodiment, the channel occupancy duration and channel occupancy time included in the first channel occupancy information are preset, which can be understood as the channel occupancy duration or channel occupancy time being a fixed value, such as 8ms. The channel occupancy start time included in the first channel occupancy information is preset, which can be understood as the time interval between the COT start time and the end symbol position of the first physical channel being a fixed value, such as the time interval being fixed at 1 OFDM symbol. The frequency domain resource allocation included in the first channel occupancy information is preset, which can be understood as a fixed relationship between the frequency domain resource allocation and the first physical channel, such as the frequency domain resource allocation being the frequency domain resource allocation where the first physical channel is located. The available resource block set corresponding to the shared channel is preset, which can be understood as the frequency domain position and number of frequency domain resource blocks of the available resource block set corresponding to the shared channel being fixed. The channel access priority is preset, which can be understood as the channel access priority being a fixed value, such as a channel access priority of 1, indicating that the first physical channel corresponds to only one channel access priority value, and this value can be a fixed, pre-known value.

[0195] In one embodiment, the shared channel occupancy information includes second channel occupancy information of one or more higher-layer signaling configurations.

[0196] In this embodiment, the second channel occupancy information can be understood as channel occupancy information configured by one or more higher-layer signaling systems. One or more of the following components included in the second channel occupancy information—channel occupancy duration, channel occupancy time, channel occupancy start time, frequency domain resource allocation, the set of available resource blocks corresponding to the shared channel, and channel access priority—are configured by one or more higher-layer signaling systems.

[0197] In this embodiment, the duration or time of channel occupancy included in the second channel occupancy information is configured by higher-layer signaling. This can be understood as higher-layer signaling configuring the duration or time of channel occupancy. When the second communication terminal receives the first physical channel, it defaults to indicating that the duration of channel occupancy is equal to the duration configured by higher-layer signaling, or it defaults to indicating that the time of channel occupancy is equal to the time configured by higher-layer signaling. The start time of channel occupancy is configured by higher-layer signaling, which can be understood as configuring the start time of channel occupancy through signaling. The method for configuring the start time of channel occupancy in higher-layer signaling can be the time interval between the start time of channel occupancy configured by higher-layer signaling and the end symbol position of the first physical channel; the set of available resource blocks included in the second channel occupancy information is configured by higher-layer signaling and can be understood as the relationship between the set of available resource blocks and the frequency domain position of the first physical channel indicated by higher-layer signaling; the frequency domain resource allocation corresponding to the shared channel included in the second channel occupancy information is configured by higher-layer signaling and can be understood as the set of frequency domain resources configured by higher-layer signaling, and the configured frequency domain resources are the frequency domain resources actually used within the set of available resource blocks; the channel access priority included in the second channel occupancy information is configured by higher-layer signaling and can be understood as the value of the channel access priority configured by higher-layer signaling. For example, if the channel access priority is configured as 1 by higher-layer signaling, after the second communication terminal receives the first physical channel, it can default to the value of the channel access priority it indicates as configured by higher-layer signaling, that is, the channel access priority is 1.

[0198] In one embodiment, the shared channel occupancy information includes one or more third channel occupancy information, each of which has a mapping relationship with the time-frequency resource location of the first physical channel.

[0199] In this embodiment, the third channel occupancy information can be understood as channel occupancy information that has a mapping relationship with the time-frequency resource location of the first physical channel. The third channel occupancy information may include one or more of the following: the duration of channel occupancy; the channel occupancy time; the start time of channel occupancy; frequency domain resource allocation; the set of available resource blocks corresponding to the shared channel; and the channel access priority.

[0200] In this embodiment, the transmission and reception of the first physical channel may include multiple selectable time-frequency resource locations. Each time-frequency resource location has a mapping relationship with the duration of channel occupation, channel occupation time, channel occupation start time, frequency domain resource allocation, the set of available resource blocks corresponding to the shared channel, and the channel access priority. Therefore, after the second communication terminal receives the first physical channel transmitted by the first communication terminal, it can determine the values ​​of the duration of channel occupation, channel occupation time, channel occupation start time, frequency domain resource allocation, the set of available resource blocks corresponding to the shared channel, and the channel access priority based on the time-frequency resource location of the first physical channel.

[0201] In one example embodiment, the first terminal transmits a first physical channel. By transmitting the first physical channel, the first terminal can indicate to other terminals that channel occupancy information is being shared. The channel occupancy information may include COT information; the channel occupancy information may include at least one of the following:

[0202] Channel Occupancy information may include one or more preset Channel Occupancy information, i.e., first channel occupancy information;

[0203] Channel Occupancy information may include one or more channel occupancy information configured by higher-layer signaling, i.e., second channel occupancy information;

[0204] Channel Occupancy information may include one or more channel occupancy information, i.e., third channel occupancy information, where each channel occupancy information has a mapping relationship with the time-frequency resource location of the first physical channel.

[0205] In one embodiment, the channel occupancy information may include one or more preset channel occupancy information. The preset channel occupancy information may include at least one of the following:

[0206] COT duration is the preset duration of channel occupancy;

[0207] COT stands for Preset Channel Occupancy Time.

[0208] COT start time is the preset start time for channel occupancy;

[0209] Frequency domain resource allocation refers to the pre-defined allocation of frequency domain resources.

[0210] The available RB set is the set of available resource blocks corresponding to the preset shared channel;

[0211] CAPC stands for Preset Channel Access Priority.

[0212] In one embodiment, the Channel Occupancy information may include one or more Channel Occupancy information configured by higher-layer signaling; the Channel Occupancy information configured by higher-layer signaling may include at least one of the following:

[0213] COT duration refers to the duration for which a channel is occupied by higher-layer signaling configuration.

[0214] COT stands for Channel Occupancy Time configured by higher-layer signaling.

[0215] COT start time is the start time of channel occupancy configured by higher-layer signaling;

[0216] Frequency domain resource allocation refers to the allocation of frequency domain resources in higher-layer signaling configuration.

[0217] The available RB set is the set of available resource blocks corresponding to the shared channels configured by higher-layer signaling.

[0218] CAPC stands for Channel Access Priority Configuration in Higher-Layer Signaling.

[0219] In one embodiment, the Channel Occupancy information may include one or more channel occupancy information, wherein each channel occupancy information has a mapping relationship with the time-frequency resource location of a first physical channel. The one or more channel occupancy information may include at least one of the following:

[0220] COT duration is the duration of channel occupancy that has a mapping relationship with the time-frequency resource location of the first physical channel;

[0221] COT refers to the channel occupancy time, which has a mapping relationship with the time-frequency resource location of the first physical channel.

[0222] COT start time is the start time of channel occupancy that has a mapping relationship with the time-frequency resource location of the first physical channel;

[0223] Frequency domain resource allocation refers to the allocation of frequency domain resources that has a mapping relationship with the time-frequency resource locations of the first physical channel.

[0224] The available RB set is the set of available resource blocks corresponding to the shared channel that has a mapping relationship with the time-frequency resource location of the first physical channel;

[0225] CAPC refers to the channel access priority that has a mapping relationship with the time-frequency resource location of the first physical channel.

[0226] Figure 9 A flowchart of another channel occupancy information indication method provided in one embodiment is shown below. Figure 9 As shown, the method provided in this embodiment can be applied to a second communication terminal, including steps 210 and 220.

[0227] In step 210, a first physical channel sent by a first communication terminal is received. The first physical channel is used to indicate shared channel occupancy information, which includes shared channel occupancy time information.

[0228] In step 220, sidelink information is transmitted during the shared channel occupancy time indicated by the shared channel occupancy time information.

[0229] The resource mapping of the first physical channel includes copying the resource element mapped by the first channel on the first target symbol to the preceding orthogonal frequency division multiplexing symbol adjacent to the first target symbol. The first target symbol is an orthogonal frequency division multiplexing symbol within one time slot of the first physical channel.

[0230] In this embodiment, no specific restrictions are placed on how the second communication terminal receives the first physical channel sent by the first communication terminal. No specific restrictions are placed on how the second communication terminal sends sidelink information within the shared channel occupancy time indicated by the shared channel occupancy time information.

[0231] In this embodiment, the second communication terminal can not only occupy the channel itself, but also use the channel preempted by the first communication terminal. The second communication terminal can obtain the shared channel occupancy information indicated by the first physical channel by receiving the first physical channel sent by the first communication terminal. It can then use the channel preempted by the first communication terminal to send sidelink information, which may include the sidelink channel and / or sidelink signal.

[0232] In this embodiment, the first physical channel can be understood as a physical sidelink channel used to transmit shared channel occupancy information. The resource mapping of the first physical channel can be understood as the first physical channel being mapped to at least two orthogonal frequency division multiplexing symbols.

[0233] In this embodiment, the first physical channel occupies several resource elements in L orthogonal frequency division multiplexing (OFDM) symbols within one time slot. The resource elements mapped by the channel on the second OFDM symbol are copied to the preceding OFDM symbol immediately adjacent to the second OFDM symbol. Where L is greater than or equal to 2.

[0234] In this embodiment, the second communication terminal receives the first physical channel sent by the first communication terminal. Based on the shared channel occupancy information indicated by the first physical channel, the second communication terminal can determine the channel shared by the first communication terminal. Then, it can use the shared channel to send sidelink information during the shared channel occupancy time, which can improve the channel access success rate of the second communication terminal and effectively solve the problem of low channel access success rate of communication terminals using sidelink technology.

[0235] In one example embodiment, the second terminal (i.e., the second communication terminal) receives a first physical channel sent by the first terminal (i.e., the first communication terminal); the second terminal obtains Channel Occupancy information (i.e., shared channel occupancy information) indicated by the first physical channel by receiving the first physical channel; the Channel Occupancy information includes COT (i.e., shared channel occupancy time), and the second terminal sends sidelink information (i.e., sidelink information, which may include sidelink channels and / or sidelink signals) within the COT.

[0236] The aforementioned first physical channel may include the following features: the first physical channel occupies several resource elements in L orthogonal frequency division multiplexing (OFDM) symbols within a time slot, and copies the resource elements mapped by the target channel on the second OFDM symbol to the preceding OFDM symbol adjacent to the second OFDM symbol, where L is greater than or equal to 2.

[0237] Figure 10 An example flowchart of another channel occupancy information indication method provided in one embodiment is shown below. Figure 3 As shown, the method includes: step 1, receiving a first physical channel; step 2, determining the ChannelOccupancy information indicated by the first physical channel; and step 3, transmitting a sidelink channel and / or a sidelink signal within the shared COT.

[0238] For the second terminal to determine the channeloccupy information indicated by the first physical channel by receiving the first physical channel, it may include one of the following:

[0239] Channel occupy information can be a pre-set set of fixed values. The second terminal can determine the pre-set channel occupy information by receiving the first physical channel. The channel occupy information and the frequency domain position or time-frequency position of the first physical channel can be mapped according to a preset rule. The second terminal can determine the channel occupy information indicated by the first terminal by using the received frequency domain position or time-frequency position of the first physical channel and the preset mapping rule.

[0240] The channel occupy information (i.e., shared channel occupancy information) determined by the second terminal mentioned above may include at least one of the following:

[0241] Available resource block set;

[0242] Frequency domain resource allocation;

[0243] The COT (Current Duration) corresponding to channel occupy;

[0244] The start time of the COT corresponding to channel occupy;

[0245] Channel access priority.

[0246] After determining the channel occupy information, the second terminal can occupy the channel within the COT time corresponding to the shared channel occupation, that is, transmit the sidelink channel and / or sidelink signal within the COT. For example, the COT corresponding to the shared channel occupation can be 8ms.

[0247] Optionally, the second terminal may determine the start time of COT based on the received first physical channel. For example, the second terminal determines the start time of COT as the OFDM symbol following the end OFDM symbol of the first physical channel received by the second terminal. Alternatively, the second terminal determines the start time of COT as the first OFDM symbol in the time slot immediately following the time slot of the first physical channel received by the second terminal.

[0248] The second terminal transmits sidelink channels and / or sidelink signals within the aforementioned defined COT. Optionally, the second terminal determines the corresponding frequency domain resource location for channel occupation within the COT based on frequency domain related information in the shared channel occupy information.

[0249] The second terminal transmits a sidelink channel and / or a sidelink signal within the aforementioned defined COT. Before transmitting the sidelink information, the second terminal may also perform one of the following: perform a channel access procedure; or not perform a sensing procedure (i.e., a perception procedure).

[0250] Before the sidelink channel (or sidelink signal) is transmitted, the second terminal may perform a channel access procedure. The channel access procedure may refer to the second terminal sensing the shared channel indicated by the first terminal (or sensing the set of frequency domain resources to which the shared channel belongs) to determine its availability. The duration of the sensing during the second terminal's second channel access procedure may include at least one of the following:

[0251] The time for the second terminal to perform sensing is at least 25us; the time for the second terminal to perform sensing is 16us.

[0252] Alternatively, before transmitting the sidelink channel (or sidelink signal), the second terminal does not perform the sensing process and directly transmits the sidelink channel (or sidelink signal). That is, the second terminal no longer further determines whether the shared channel indicated by the first terminal is available, and the second terminal directly transmits the sidelink channel and / or sidelink signal within the shared COT.

[0253] In one embodiment, the first physical channel occupies at least two orthogonal frequency division multiplexing (OFDM) symbols within one time slot, and the first target symbol includes the second OFDM symbol among the at least two OFDM symbols.

[0254] In one embodiment, the start time of the shared channel occupancy time information is located on one or more of the following orthogonal frequency division multiplexing symbols:

[0255] The first orthogonal frequency division multiplexing symbol in the next time slot of the time slot where the first physical channel is located; the last orthogonal frequency division multiplexing symbol in the time slot where the first physical channel is located.

[0256] In this embodiment, the start time of the shared channel occupancy time information is located on the first orthogonal frequency division multiplexing symbol of the next time slot of the first physical channel, or the start time of the shared channel occupancy time information is located on the last orthogonal frequency division multiplexing symbol in the time slot of the first physical channel.

[0257] In one example embodiment, a second terminal receives a first physical channel sent by a first terminal, and the second terminal determines the Channel Occupancy Time (COT) of the shared channel based on the received first physical channel. The shared channel refers to the channel indicated or determined by the channel occupancy information provided by the first terminal. The COT of the shared channel refers to the duration for which the second terminal can use the channel shared by the first terminal.

[0258] The second terminal can determine the start time of the shared channel COT through the first physical channel sent by the first terminal, including at least one of the following:

[0259] The start time of the shared channel COT is the first OFDM symbol in the next time slot of the first physical channel;

[0260] The start time of the shared channel COT is the last OFDM symbol in the time slot of the first physical channel.

[0261] Figure 11 This is a schematic diagram of a second terminal receiving a first physical channel according to an embodiment, as shown below. Figure 11 As shown, the second terminal receives the first physical channel transmitted by the first terminal on OFDM symbols numbered 11 and 12 in time slot n. The start time of the shared channel COT determined by the second terminal is the OFDM symbol numbered 0 in time slot n+1. The second terminal can transmit sidelink channels and / or sidelink signals from the OFDM symbol numbered 0 in time slot n+1, and the duration of sidelink channel and / or channel transmission (i.e., channel occupancy) is... Figure 11 The COT marked in the text.

[0262] Alternatively, the second terminal determines the start time of the shared channel COT to be OFDM symbol number 13 on time slot n, and the second terminal can transmit the sidelink channel and / or sidelink signal from OFDM symbol number 13 on time slot n.

[0263] In one embodiment, the first physical channel is on the second target symbol, and the second communication terminal sends a sidelink shared channel to the first communication terminal. The second communication terminal determines the channel resources of the first physical channel corresponding to the sidelink shared channel through the mapping relationship between the first physical channel and the sidelink shared channel.

[0264] The channel resources include one or more of the following: time-domain resources; frequency-domain resources.

[0265] In one embodiment, the time-frequency resources of the first physical channel overlap with those of the physical sidelink feedback channel used to indicate acknowledgment or negative acknowledgment information, and the cyclic shift of the sequence corresponding to the first physical channel is different from the cyclic shift of the sequence corresponding to the physical sidelink feedback channel.

[0266] In one embodiment, the time-frequency resources of the first physical channel overlap with those of the physical sidelink feedback channel used to indicate conflict information, and the cyclic shift of the sequence corresponding to the first physical channel is different from the cyclic shift of the sequence corresponding to the physical sidelink feedback channel.

[0267] In one embodiment, the first physical channel simultaneously indicates a hybrid automatic retransmission acknowledgment and a channel occupancy enable message.

[0268] In this embodiment, the sequence cyclic shift of the sequence corresponding to the first physical channel is mapped to at least one of the following pieces of information:

[0269] Negative acknowledgment and channel occupancy enabled; negative acknowledgment and channel occupancy disabled; positive acknowledgment and channel occupancy enabled; positive acknowledgment and channel occupancy disabled.

[0270] In one embodiment, the second communication terminal receives a first physical channel, a second physical channel, and a third physical channel in a first time slot;

[0271] The time corresponding to the first physical channel includes the second target symbol, which includes at least two orthogonal frequency division multiplexing symbols in the first time slot;

[0272] The times corresponding to the second and third physical channels are earlier than the times corresponding to the first physical channel.

[0273] The last orthogonal frequency division multiplexing (OFDM) symbol of the third physical channel is separated from the first OFDM symbol of the first physical channel by zero or one OFDM symbol.

[0274] In this embodiment, the sidelink control information located on the second physical channel includes a first part of the shared channel occupancy time information; the first physical channel is used to indicate a second part of the shared channel occupancy time information.

[0275] In one example embodiment, the second terminal determines the shared channel occupancy information indicated by the first terminal using one of the following methods.

[0276] Method 1: The second terminal receives the shared channel occupancy information indicated by the first terminal through the first physical channel. The first terminal sends SCI (i.e., side link control information) on the PSCCH (i.e., the second physical channel) that does not include the shared channel occupancy information. The second terminal indicates the shared channel occupancy information through the first physical channel, determines the shared channel occupancy information, and sends the sidelink channel and / or sidelink signal in the COT corresponding to the shared channel occupancy based on the shared channel occupancy information.

[0277] Method 2: The second terminal receives the SCI sent by the first terminal via PSSCH in time slot n, and also receives the first physical channel sent by the first terminal in time slot n, including:

[0278] The SCI includes the first part of the COT shared information;

[0279] The first physical channel is used to indicate the second part of the COT shared information.

[0280] In Method 2, SCI may include a first portion of the COT shared information, which may include at least one of the following:

[0281] Shared COT (i.e., the duration of channel occupancy);

[0282] The available RB set corresponding to the shared channel (i.e., the set of available resource blocks corresponding to the shared channel);

[0283] CAPC (i.e., Channel Access Priority);

[0284] In Method 2, the second portion of the COT-shared information indicated by the first physical channel may include at least one of the following:

[0285] The start time of shared COT (i.e., the start time of channel occupancy);

[0286] Enable or enable shared channel occupancy;

[0287] Enable or activate the COT corresponding to the shared channel.

[0288] In one embodiment, the second terminal receives the first physical channel transmitted by the first terminal in time slot n, and also receives the SCI transmitted by the first terminal via PSCCH. The delay of the second terminal receiving the SCI is significantly greater than the delay of the second terminal receiving the first physical channel. The first part of the shared channel occupancy information received by the second terminal may include at least one of the following: the COT (i.e., the duration of channel occupancy) of the shared channel occupancy, CAPC, etc. CAPC is used to determine the COT (i.e., the duration of channel occupancy). The second part of the shared channel occupancy information received by the second terminal includes at least one of the following: the start time of the shared COT, the enabling (or opening) of shared channel occupancy, the enabling (or opening) of the COT corresponding to the shared channel, etc. In the first OFDM symbol of time slot n+1, the second terminal cannot determine whether it occupies (shares) the corresponding channel using the first part of the shared channel occupancy information included in the SCI. This is because the reception delay of the SCI is greater. At this point, the second terminal can determine that it can occupy (share) the corresponding channel in time slot n+1 based on the information indicated by the received second part of the information (e.g., an indication of shared channel occupancy being enabled). However, during the first few OFDM symbols of slot n+1, the second terminal cannot know the duration of the shared channel occupancy. Only after the second terminal receives the SCI can it determine the duration of the shared channel occupancy. Therefore, the second terminal can continue to occupy the shared channel.

[0289] By using the first and second parts of the shared channel occupancy information, the second terminal can not only obtain more comprehensive shared channel occupancy information, but also occupy the channel shared by the first terminal earlier and faster. Here, the shared channel refers to the channel identified in the shared channel occupancy information indicated by the first terminal.

[0290] In one embodiment, the second communication terminal receives a first physical channel in a first time slot and a second physical channel and a third physical channel in a second time slot;

[0291] The first and second time slots belong to the same target time slot set. The first and second time slots are adjacent time slots in the target time slot set, with the first time slot being earlier than the second time slot. The target time slot set is the time slot set corresponding to a side link resource pool.

[0292] In this embodiment, the second communication terminal receives the first physical channel in the first time slot, and the first physical channel is used to indicate the first part of the shared channel occupancy time information;

[0293] The second communication terminal receives the sidelink control information sent by the first communication terminal through the second physical channel in the second time slot. The sidelink control information on the second physical channel includes the second part of the shared channel occupancy time information.

[0294] In one example embodiment, the second terminal determines the shared channel occupancy information indicated by the first terminal using one of the following methods.

[0295] Method 1: The second terminal receives shared channel occupancy information indicated by the first terminal via the first physical channel. The SCI sent by the first terminal via the PSCCH does not include shared channel occupancy information. The second terminal determines the shared channel occupancy information by indicating it via the first physical channel, and based on the channel occupancy information, sends a sidelink channel and / or a sidelink signal within the COT corresponding to the shared channel occupancy.

[0296] Method 2: The second terminal receives the first physical channel transmitted by the second terminal in time slot n (i.e., the first time slot), and receives the SCI transmitted by the first terminal via PSSCH in time slot m (i.e., the second time slot), including:

[0297] The first physical channel is used to indicate a first portion of information in the COT shared information;

[0298] The SCI includes the second part of the COT shared information.

[0299] In Method 2, the first portion of the COT-shared information indicated by the first physical channel includes at least one of the following:

[0300] The start time of shared COT;

[0301] Enable or enable shared channel occupancy;

[0302] Enable or activate the COT corresponding to the shared channel.

[0303] In Method 2, SCI includes the second part of the COT shared information, including at least one of the following:

[0304] Shared COT;

[0305] Available RB set corresponding to the shared channel;

[0306] CAPC.

[0307] In one embodiment, the second terminal receives the first physical channel transmitted by the first terminal in time slot n. In the first few OFDM symbols of time slot m, the second terminal has already determined the first part of the shared channel occupancy information through the received first physical channel, but the second terminal has not yet received the second part of the shared channel occupancy information. The first part of the shared channel occupancy information received by the second terminal includes at least one of the following: the start time of the shared COT, the enabling (or enabling) of shared channel occupancy, and the enabling (or enabling) of the COT corresponding to the shared channel. In the first few symbols of time slot m, or even throughout time slot m, the first terminal cannot obtain the second part of the shared channel occupancy information, and therefore cannot know the duration of channel occupancy corresponding to the shared channel. However, the first terminal knows that the corresponding COT is enabled, and it can currently occupy the shared channel. Before obtaining the second part of the shared channel occupancy information, the first terminal can occupy the shared channel.

[0308] Considering that the time the second terminal occupies the shared channel cannot exceed the duration of channel occupancy corresponding to the shared channel, after a certain delay (e.g., several OFDM symbols or 1-2 time slots) after receiving the first part of the shared channel occupancy information, the second terminal receives the second part of the shared channel occupancy information, thereby determining the duration of channel occupancy. Thus, the second terminal can determine the end time of occupying the shared channel.

[0309] By using the first and second parts of the shared channel occupancy information, the second terminal can not only obtain more comprehensive shared channel occupancy information, but also occupy the channel shared by the first terminal earlier and faster. Here, the shared channel refers to the channel determined by the shared channel occupancy information indicated by the first terminal.

[0310] In this embodiment, the second physical channel includes a physical side link control channel; the third physical channel includes a physical side link shared channel.

[0311] In one embodiment, the shared channel occupancy information includes one or more of the following:

[0312] Channel occupancy duration; channel occupancy time; channel occupancy start time; frequency domain resource allocation; set of available resource blocks corresponding to the shared channel; channel access priority.

[0313] In one embodiment, the shared channel occupancy information includes one or more preset first channel occupancy information.

[0314] In one embodiment, the shared channel occupancy information includes second channel occupancy information of one or more higher-layer signaling configurations.

[0315] In one embodiment, the shared channel occupancy information includes one or more third channel occupancy information, each of which has a mapping relationship with the time-frequency resource location of the first physical channel.

[0316] This application also provides a channel occupancy information indication device. Figure 12 This is a schematic diagram of a channel occupancy information indication device according to one embodiment. Figure 12 As shown, the channel occupancy information indication device can be configured in the first communication terminal and includes:

[0317] The determination module 110 is configured to determine shared channel occupancy information, which includes shared channel occupancy time information.

[0318] The resource mapping module 120 is configured to perform resource mapping of the first physical channel, copying the resource element mapped by the first channel on the first target symbol to the preceding orthogonal frequency division multiplexing symbol adjacent to the first target symbol; the first physical channel is used to indicate the shared channel occupancy information; the first target symbol is an orthogonal frequency division multiplexing symbol within one time slot of the physical channel.

[0319] The transmitting module 130 is configured to transmit the first physical channel to at least one second communication terminal.

[0320] In this embodiment, the channel occupancy information indication device allows the second communication terminal to share the channel occupied by the first communication terminal after the first communication terminal has preempted the channel. This improves the channel access success rate of the second communication terminal and effectively solves the problem of low channel access success rate of communication terminals using sidelink technology.

[0321] In one embodiment, the first physical channel occupies at least two orthogonal frequency division multiplexing (OFDM) symbols within one time slot, and the first target symbol includes the second OFDM symbol among the at least two OFDM symbols.

[0322] In one embodiment, the first physical channel includes a physical sidelink feedback channel.

[0323] In one embodiment, the device further includes a channel resource determination module, configured to receive the physical sidelink shared channel sent by the at least one second communication terminal;

[0324] The channel resources of the first physical channel are determined based on the mapping relationship between the first physical channel and the side link shared channel;

[0325] The channel resources include one or more of the following: time-domain resources; frequency-domain resources.

[0326] In one embodiment, the time-frequency resources of the first physical channel overlap with those of the physical sidelink feedback channel used to indicate acknowledgment or negative acknowledgment information, and the cyclic shift of the sequence corresponding to the first physical channel is different from the cyclic shift of the sequence corresponding to the physical sidelink feedback channel.

[0327] In one embodiment, the time-frequency resources of the first physical channel overlap with those of the physical sidelink feedback channel used to indicate conflict information, and the cyclic shift of the sequence corresponding to the first physical channel is different from the cyclic shift of the sequence corresponding to the physical sidelink feedback channel.

[0328] In one embodiment, the first physical channel simultaneously indicates hybrid automatic retransmission acknowledgment information and channel occupancy enable information.

[0329] In one embodiment, the sequence cyclic shift of the sequence corresponding to the first physical channel is mapped to at least one of the following information:

[0330] Negative acknowledgment and channel occupancy enabled; negative acknowledgment and channel occupancy disabled; positive acknowledgment and channel occupancy enabled; positive acknowledgment and channel occupancy disabled.

[0331] In one embodiment, the first communication terminal and the at least one second communication terminal belong to the same user group.

[0332] In one embodiment, when the at least one second communication terminal includes a second communication terminal, the first communication terminal sends a first physical channel to the second communication terminal via unicast.

[0333] In one embodiment, the first physical channel is used to indicate cooperation information, which includes shared channel occupancy time.

[0334] In one embodiment, the first communication terminal transmits a first physical channel, a second physical channel, and a third physical channel in the same time slot;

[0335] The time corresponding to the first physical channel includes the second target symbol, which includes at least two orthogonal frequency division multiplexing symbols in the same time slot;

[0336] The time corresponding to the second physical channel and the third physical channel is earlier than the time corresponding to the first physical channel;

[0337] The last orthogonal frequency division multiplexing (OFDM) symbol of the third physical channel is spaced between the first orthogonal frequency division multiplexing (OFDM) symbol of the first physical channel and the last OFDM symbol of the third physical channel by zero or one OFDM symbol.

[0338] In this embodiment, the sidelink control information located on the second physical channel includes a first part of the shared channel occupancy time information; the first physical channel is used to indicate a second part of the shared channel occupancy time information.

[0339] The second physical channel includes the physical side link control channel; the third physical channel includes the physical side link shared channel.

[0340] In one embodiment, the first communication terminal transmits a first physical channel in a first time slot, and the first communication terminal transmits a second physical channel and a third physical channel in a second time slot;

[0341] The first and second time slots belong to the same target time slot set. The first and second time slots are adjacent time slots in the target time slot set, with the first time slot being earlier than the second time slot. The target time slot set is the time slot set corresponding to a side link resource pool.

[0342] The first communication terminal transmits a first physical channel on at least two orthogonal frequency division multiplexing symbols in the first time slot; the first communication terminal transmits a second physical channel starting from the first orthogonal frequency division multiplexing symbol in the second time slot or starting from the second orthogonal frequency division multiplexing symbol in the second time slot.

[0343] The first physical channel is used to indicate the first part of the shared channel occupancy time information; the side link control information on the second physical channel includes the second part of the shared channel occupancy time information.

[0344] The second physical channel includes the physical side link control channel; the third physical channel includes the physical side link shared channel.

[0345] In one embodiment, the shared channel occupancy information includes one or more of the following:

[0346] Channel occupancy duration; channel occupancy time; channel occupancy start time; frequency domain resource allocation; set of available resource blocks corresponding to the shared channel; channel access priority.

[0347] In one embodiment, at least one communication terminal includes a second communication terminal, and correspondingly, when the first communication terminal transmits the first physical channel to the second communication terminal in the first time slot, one or more of the following conditions are met:

[0348] The first communication terminal received the side link control information sent by the second communication terminal in the third time slot, reserving time and frequency resources in the second time slot;

[0349] The first time slot and the second time slot belong to the same target time slot set. The first time slot and the second time slot are adjacent time slots in the target time slot set, and the first time slot is earlier than the second time slot.

[0350] The third time slot is earlier than the second time slot.

[0351] In one embodiment, the shared channel occupancy information includes one or more preset first channel occupancy information.

[0352] In one embodiment, the shared channel occupancy information includes second channel occupancy information of one or more higher-layer signaling configurations.

[0353] In one embodiment, the shared channel occupancy information includes one or more third channel occupancy information, each of which has a mapping relationship with the time-frequency resource location of the first physical channel.

[0354] The channel occupancy information indication device proposed in this embodiment belongs to the same inventive concept as the channel occupancy information indication method proposed in the above embodiments. Technical details not described in detail in this embodiment can be found in any of the above embodiments. Furthermore, this embodiment has the same beneficial effects as the channel occupancy information indication method.

[0355] This application also provides another channel occupancy information indication device. Figure 13 This is a schematic diagram of another channel occupancy information indication device provided in one embodiment. (See attached diagram.) Figure 13 As shown, the channel occupancy information indication device can be configured in a second communication terminal and includes:

[0356] The receiving module 210 is configured to receive a first physical channel sent by a first communication terminal. The first physical channel is used to indicate shared channel occupancy information, which includes shared channel occupancy time information.

[0357] Using module 220, it is configured to send sidelink information during the shared channel occupancy time indicated by the shared channel occupancy time information.

[0358] The resource mapping of the first physical channel includes copying the resource elements mapped by the first channel on the first target symbol to the preceding orthogonal frequency division multiplexing symbol adjacent to the first target symbol. The first target symbol is an orthogonal frequency division multiplexing symbol within one time slot of the first physical channel.

[0359] In this embodiment, the channel occupancy information indication device allows the second communication terminal to determine the shared channel of the first communication terminal by receiving the first physical channel sent by the first communication terminal and the shared channel occupancy information indicated by the first physical channel. This enables the second communication terminal to use the shared channel to send sidelink information during the shared channel occupancy period, thereby improving the channel access success rate of the second communication terminal and effectively solving the problem of low channel access success rate of communication terminals using sidelink technology.

[0360] In one embodiment, the first physical channel occupies at least two orthogonal frequency division multiplexing (OFDM) symbols within one time slot, and the first target symbol includes the second OFDM symbol among the at least two OFDM symbols.

[0361] In one embodiment, the start time of the shared channel occupancy time information is located on one or more of the following orthogonal frequency division multiplexing symbols:

[0362] The first orthogonal frequency division multiplexing symbol in the next time slot of the time slot where the first physical channel is located; the last orthogonal frequency division multiplexing symbol in the time slot where the first physical channel is located.

[0363] In one embodiment, the first physical channel is on the second target symbol. When the second communication terminal sends the sidelink shared channel to the first communication terminal, the second communication terminal determines the channel resources of the first physical channel corresponding to the sidelink shared channel through the mapping relationship between the first physical channel and the sidelink shared channel.

[0364] The channel resources include one or more of the following: time-domain resources; frequency-domain resources.

[0365] In one embodiment, the time-frequency resources of the first physical channel overlap with those of the physical sidelink feedback channel used to indicate acknowledgment or negative acknowledgment information, and the cyclic shift of the sequence corresponding to the first physical channel is different from the cyclic shift of the sequence corresponding to the physical sidelink feedback channel.

[0366] In one embodiment, the time-frequency resources of the first physical channel overlap with those of the physical sidelink feedback channel used to indicate conflict information, and the cyclic shift of the sequence corresponding to the first physical channel is different from the cyclic shift of the sequence corresponding to the physical sidelink feedback channel.

[0367] In one embodiment, the first physical channel simultaneously indicates a hybrid automatic retransmission acknowledgment and a channel occupancy enable message.

[0368] Specifically, the sequence cyclic shift corresponding to the first physical channel is mapped to at least one of the following pieces of information:

[0369] Negative acknowledgment and channel occupancy enabled; negative acknowledgment and channel occupancy disabled; positive acknowledgment and channel occupancy enabled; positive acknowledgment and channel occupancy disabled.

[0370] In one embodiment, the second communication terminal receives a first physical channel, a second physical channel, and a third physical channel in a first time slot;

[0371] The time corresponding to the first physical channel includes the second target symbol, which includes at least two orthogonal frequency division multiplexing symbols in the first time slot;

[0372] The times corresponding to the second and third physical channels are earlier than the times corresponding to the first physical channel.

[0373] The last orthogonal frequency division multiplexing (OFDM) symbol of the third physical channel is separated from the first OFDM symbol of the first physical channel by zero or one OFDM symbol.

[0374] The side link control information located on the second physical channel includes the first part of the shared channel occupancy time information; the first physical channel is used to indicate the second part of the shared channel occupancy time information.

[0375] The second physical channel includes the physical side link control channel; the third physical channel includes the physical side link shared channel.

[0376] In one embodiment, the second communication terminal receives a first physical channel in a first time slot and a second physical channel and a third physical channel in a second time slot;

[0377] The first and second time slots belong to the same target time slot set. The first and second time slots are adjacent time slots in the target time slot set, with the first time slot being earlier than the second time slot. The target time slot set is the time slot set corresponding to a side link resource pool.

[0378] In this process, the second communication terminal receives a first physical channel in the first time slot, the first physical channel being used to indicate a first part of the shared channel occupancy time information; the second communication terminal receives sidelink control information sent by the first communication terminal through the second physical channel in the second time slot, the sidelink control information on the second physical channel including a second part of the shared channel occupancy time information.

[0379] The second physical channel includes the physical side link control channel; the third physical channel includes the physical side link shared channel.

[0380] In one embodiment, the shared channel occupancy information includes one or more preset first channel occupancy information.

[0381] In one embodiment, the shared channel occupancy information includes second channel occupancy information of one or more higher-layer signaling configurations.

[0382] In one embodiment, the shared channel occupancy information includes one or more third channel occupancy information, each of which has a mapping relationship with the time-frequency resource location of the first physical channel.

[0383] The channel occupancy information indication device proposed in this embodiment belongs to the same inventive concept as the channel occupancy information indication method proposed in the above embodiments. Technical details not described in detail in this embodiment can be found in any of the above embodiments. Furthermore, this embodiment has the same beneficial effects as the channel occupancy information indication method.

[0384] This application also provides a terminal device. Figure 14 This is a schematic diagram of the hardware structure of a first communication terminal provided in one embodiment, as shown below. Figure 14 As shown, the first communication terminal provided in this application includes a memory 420, a processor 410, and a computer program stored in the memory and executable on the processor. When the processor 410 executes the program, it implements the aforementioned channel occupancy information indication method.

[0385] The first communication terminal may further include a memory 420; the processor 410 in the first communication terminal may be one or more. Figure 14 Taking a processor 410 as an example; memory 420 is used to store one or more programs; the one or more programs are executed by the one or more processors 410, so that the one or more processors 410 implement the channel occupancy information indication method as described in the embodiments of this application.

[0386] The first communication terminal also includes: a communication device 430, an input device 440, and an output device 450.

[0387] The processor 410, memory 420, communication device 430, input device 440, and output device 450 in the first communication terminal can be connected via a bus or other means. Figure 14 Taking the example of a connection between China and Israel via a bus.

[0388] Input device 440 can be used to receive input digital or character information, and to generate key signal inputs related to user settings and function control of the terminal device. Output device 450 may include display devices such as a display screen.

[0389] The communication device 430 may include a receiver and a transmitter. The communication device 430 is configured to perform information transmission and reception communication under the control of the processor 410.

[0390] The memory 420, as a computer-readable storage medium, can be configured to store software programs, computer-executable programs, and modules, such as program instructions / modules corresponding to the channel occupancy information indication method described in the embodiments of this application (e.g., the determination module 110, resource mapping module 120, and transmission module 130 in the channel occupancy information indication device). The memory 420 may include a program storage area and a data storage area, wherein the program storage area may store the operating system and at least one application program required for a function; the data storage area may store data created based on the use of the first communication terminal, etc. Furthermore, the memory 420 may include high-speed random access memory and may also include non-volatile memory, such as at least one disk storage device, flash memory device, or other non-volatile solid-state storage device. In some instances, the memory 420 may further include memory remotely located relative to the processor 510, and these remote memories can be connected to the first communication terminal via a network. Examples of such networks include, but are not limited to, the Internet, corporate intranets, local area networks, mobile communication networks, and combinations thereof.

[0391] This application also provides a second communication terminal. Figure 15 This is a schematic diagram of the hardware structure of a second communication terminal provided in one embodiment, such as... Figure 15 As shown, the second communication terminal provided in this application includes a memory 520, a processor 510, and a computer program stored in the memory and executable on the processor. When the processor 510 executes the program, it implements the channel occupancy information indication method described above.

[0392] The first communication terminal may further include a memory 520; the processor 510 in the second communication terminal may be one or more. Figure 15 Taking a processor 510 as an example; memory 520 is used to store one or more programs; the one or more programs are executed by the one or more processors 510, so that the one or more processors 510 implement the channel occupancy information indication method as described in the embodiments of this application.

[0393] The second communication terminal also includes: a communication device 530, an input device 540, and an output device 550.

[0394] The processor 510, memory 520, communication device 530, input device 540, and output device 550 in the second communication terminal can be connected via a bus or other means. Figure 15 Taking the example of a connection between China and Israel via a bus.

[0395] Input device 540 can be used to receive input digital or character information, and to generate key signal inputs related to user settings and function control of the terminal device. Output device 550 may include display devices such as a display screen.

[0396] The communication device 530 may include a receiver and a transmitter. The communication device 530 is configured to perform information transmission and reception communication under the control of the processor 510.

[0397] The memory 520, as a computer-readable storage medium, can be configured to store software programs, computer-executable programs, and modules, such as program instructions / modules corresponding to the channel occupancy information indication method described in the embodiments of this application (e.g., the receiving module 210 and the using module 220 in the channel occupancy information indication device). The memory 520 may include a program storage area and a data storage area, wherein the program storage area may store the operating system and at least one application program required for a function; the data storage area may store data created based on the use of the second communication terminal, etc. Furthermore, the memory 520 may include high-speed random access memory and may also include non-volatile memory, such as at least one disk storage device, flash memory device, or other non-volatile solid-state storage device. In some instances, the memory 520 may further include memory remotely located relative to the processor 510, and these remote memories can be connected to the second communication terminal via a network. Examples of such networks include, but are not limited to, the Internet, corporate intranets, local area networks, mobile communication networks, and combinations thereof.

[0398] This application also provides a storage medium storing a computer program, which, when executed by a processor, implements any of the transmission methods described in this application.

[0399] Optionally, this transmission method, applied to a terminal device, includes: determining information to be transmitted, wherein the information to be transmitted instructs a management entity to select resources for the terminal device; and transmitting the information to be transmitted to the management entity.

[0400] Optionally, the transmission method is applied to a management entity and includes: acquiring information to be transmitted, wherein the information to be transmitted instructs the management entity to select resources for the terminal device; and selecting resources based on the information to be transmitted.

[0401] The computer storage medium in this application embodiment can be any combination of one or more computer-readable media. The computer-readable medium can be a computer-readable signal medium or a computer-readable storage medium. For example, a computer-readable storage medium can be, but is not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination thereof. More specific examples of computer-readable storage media (a non-exhaustive list) include: an electrical connection having one or more wires, a portable computer disk, a hard disk, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM), flash memory, optical fiber, portable CD-ROM, optical storage device, magnetic storage device, or any suitable combination thereof. The computer-readable storage medium can be any tangible medium containing or storing a program that can be used by or in conjunction with an instruction execution system, apparatus, or device.

[0402] Computer-readable signal media may include data signals propagated in baseband or as part of a carrier wave, carrying computer-readable program code. Such propagated data signals may take various forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination thereof. Computer-readable signal media may also be any computer-readable medium other than computer-readable storage media, which can send, propagate, or transmit programs for use by or in connection with an instruction execution system, apparatus, or device.

[0403] Program code contained on a computer-readable medium may be transmitted using any suitable medium, including but not limited to: wireless, wire, optical fiber, radio frequency (RF), etc., or any suitable combination thereof.

[0404] Computer program code for performing the operations of this application can be written in one or more programming languages ​​or a combination thereof, including object-oriented programming languages ​​such as Java, Smalltalk, and C++, as well as conventional procedural programming languages ​​such as "C" or similar programming languages. The program code can be executed entirely on the user's computer, partially on the user's computer, as a standalone software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In cases involving remote computers, the remote computer can be connected to the user's computer via any type of network, including a local area network (LAN) or a wide area network (WAN), or it can be connected to an external computer (e.g., via the Internet using an Internet service provider).

[0405] The above description is merely an exemplary embodiment of this application and is not intended to limit the scope of protection of this application.

[0406] Those skilled in the art will understand that the term user terminal encompasses any suitable type of wireless user equipment, such as mobile phones, portable data processing devices, portable web browsers, or vehicle-mounted mobile stations.

[0407] Generally, the various embodiments of this application can be implemented in hardware or dedicated circuitry, software, logic, or any combination thereof. For example, some aspects can be implemented in hardware, while others can be implemented in firmware or software that can be executed by a controller, microprocessor, or other computing device, although this application is not limited thereto.

[0408] Embodiments of this application can be implemented by executing computer program instructions through the data processor of a mobile device, for example, in a processor entity, or through hardware, or through a combination of software and hardware. The computer program instructions can be assembly instructions, Instruction Set Architecture (ISA) instructions, machine instructions, machine-dependent instructions, microcode, firmware instructions, status setting data, or source code or object code written in any combination of one or more programming languages.

[0409] Any block diagram of logical flow in the accompanying drawings of this application may represent program steps, or may represent interconnected logic circuits, modules, and functions, or may represent a combination of program steps and logic circuits, modules, and functions. The computer program may be stored on memory. Memory may be of any type suitable to the local technical environment and may be implemented using any suitable data storage technology, such as, but not limited to, read-only memory (ROM), random access memory (RAM), optical storage devices and systems (Digital Video Disc (DVD) or Compact Disk (CD), etc.). Computer-readable media may include non-transitory storage media. Data processors may be of any type suitable to the local technical environment, such as, but not limited to, general-purpose computers, special-purpose computers, microprocessors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), and processors based on multi-core processor architectures.

[0410] A detailed description of exemplary embodiments of this application has been provided above through exemplary and non-limiting examples. However, various modifications and adjustments to the above embodiments will be apparent to those skilled in the art when considered in conjunction with the accompanying drawings and claims, without departing from the scope of this application. Therefore, the proper scope of this application will be determined by the claims.

Claims

1. A method of channel occupancy information indication, the method comprising: Applied to a first communication terminal, the method includes: Determine shared channel occupancy information, which includes shared channel occupancy time information; Perform resource mapping of the first physical channel, copy the resource element mapped by the first channel on the first target symbol to the previous orthogonal frequency division multiplexing symbol adjacent to the first target symbol, the first physical channel is used to indicate the shared channel occupancy information, the first physical channel includes a physical side link feedback channel, and the first target symbol is an orthogonal frequency division multiplexing symbol in one time slot of the first physical channel; Send the first physical channel to at least one second communication terminal.

2. The method of claim 1, wherein, The first physical channel occupies at least two orthogonal frequency division multiplexing (OFDM) symbols within one time slot, and the first target symbol includes the second OFDM symbol among the at least two OFDM symbols.

3. The method of claim 1, wherein, Also includes: Receive the physical sidelink shared channel sent by the at least one second communication terminal; The channel resources of the first physical channel are determined based on the mapping relationship between the first physical channel and the side link shared channel; The channel resources include one or more of the following: time-domain resources; frequency-domain resources.

4. The method of claim 1, wherein, The first physical channel overlaps with the time-frequency resources of the physical sidelink feedback channel used to indicate acknowledgment or negative acknowledgment information, and the cyclic shift of the sequence corresponding to the first physical channel is different from the cyclic shift of the sequence corresponding to the physical sidelink feedback channel.

5. The method of claim 1, wherein, The first physical channel overlaps with the time-frequency resources of the physical sidelink feedback channel used to indicate collision information, and the cyclic shift of the sequence corresponding to the first physical channel is different from the cyclic shift of the sequence corresponding to the physical sidelink feedback channel.

6. The method of claim 1, wherein, The first physical channel simultaneously indicates the hybrid automatic retransmission acknowledgment information and the channel occupancy enable information.

7. The method of claim 6, wherein, The sequence cyclic shift corresponding to the first physical channel is mapped to at least one of the following information: Negative acknowledgment and channel occupancy enabled; negative acknowledgment and channel occupancy disabled; positive acknowledgment and channel occupancy enabled; positive acknowledgment and channel occupancy disabled.

8. The method of claim 1, wherein, The first communication terminal and the at least one second communication terminal belong to the same user group.

9. The method of claim 1, wherein, When the at least one second communication terminal includes a second communication terminal, the first communication terminal sends a first physical channel to the second communication terminal via unicast.

10. The method of claim 1, wherein, The first physical channel is used to indicate cooperation information, which includes the shared channel occupancy time.

11. The method of claim 1, wherein, The first communication terminal transmits the first physical channel, the second physical channel, and the third physical channel in the same time slot; The time corresponding to the first physical channel includes the second target symbol, which includes at least two orthogonal frequency division multiplexing symbols in the same time slot; The time corresponding to the second physical channel and the third physical channel is earlier than the time corresponding to the first physical channel; The last orthogonal frequency division multiplexing (OFDM) symbol of the third physical channel is spaced between the first orthogonal frequency division multiplexing (OFDM) symbol of the first physical channel and the last OFDM symbol of the third physical channel by zero or one OFDM symbol.

12. The method according to claim 11, characterized in that, The sidelink control information located on the second physical channel includes the first part of the shared channel occupancy time information; The first physical channel is used to indicate the second part of the shared channel occupancy time information.

13. The method of claim 1, wherein, The first communication terminal transmits a first physical channel in a first time slot, and the first communication terminal transmits a second physical channel and a third physical channel in a second time slot; The first time slot and the second time slot belong to the same target time slot set. The first time slot and the second time slot are adjacent time slots in the target time slot set, and the first time slot is earlier than the second time slot. The target time slot set is a time slot set corresponding to a side link resource pool.

14. The method according to claim 13, characterized in that, The first communication terminal transmits a first physical channel on at least two orthogonal frequency division multiplexing symbols in the first time slot; The first communication terminal transmits the second physical channel starting from the first orthogonal frequency division multiplexing symbol of the second time slot or from the second orthogonal frequency division multiplexing symbol of the second time slot.

15. The method according to claim 13, characterized in that, The first physical channel is used to indicate the first part of the shared channel occupancy time information; The sidelink control information on the second physical channel includes the second part of the shared channel occupancy time information.

16. The method according to any one of claims 11-15, characterized in that, The second physical channel includes a physical sidelink control channel; the third physical channel includes a physical sidelink shared channel.

17. The method of claim 1, wherein, The shared channel occupancy information includes one or more of the following: Channel occupancy duration; channel occupancy time; channel occupancy start time; frequency domain resource allocation; set of available resource blocks corresponding to the shared channel; channel access priority.

18. The method of claim 1, wherein, When the first communication terminal transmits the first physical channel to at least one second communication terminal in the first time slot, one or more of the following conditions are met: The first communication terminal receives the side link control information sent by the second communication terminal in the third time slot, which reserves time and frequency resources in the second time slot; The first time slot and the second time slot belong to the same target time slot set, and the first time slot and the second time slot are adjacent time slots in the target time slot set, with the first time slot being earlier than the second time slot; The third time slot is earlier than the second time slot.

19. The method of claim 1, wherein, The shared channel occupancy information includes one or more preset first channel occupancy information.

20. The method of claim 1, wherein, The shared channel occupancy information includes second channel occupancy information configured by one or more higher-layer signaling systems.

21. The method of claim 1, wherein, The shared channel occupancy information includes one or more third channel occupancy information, and each third channel occupancy information has a mapping relationship with the time-frequency resource location of the first physical channel.

22. A method of indicating channel occupancy information, the method comprising: Applied to a second communication terminal, the method includes: The system receives a first physical channel sent by a first communication terminal. The first physical channel is used to indicate shared channel occupancy information, which includes shared channel occupancy time information. The first physical channel includes a physical sidelink feedback channel. Sidelink information is transmitted within the shared channel occupancy time indicated by the shared channel occupancy time information; The resource mapping of the first physical channel includes copying the resource element mapped by the first channel on the first target symbol to the preceding orthogonal frequency division multiplexing symbol adjacent to the first target symbol. The first target symbol is an orthogonal frequency division multiplexing symbol within one time slot of the first physical channel.

23. The method according to claim 22, characterized in that, The first physical channel occupies at least two orthogonal frequency division multiplexing (OFDM) symbols within one time slot, and the first target symbol includes the second OFDM symbol among the at least two OFDM symbols.

24. The method of claim 22, wherein, The start time of the shared channel occupancy time information is located on one or more of the following orthogonal frequency division multiplexing symbols: The first orthogonal frequency division multiplexing symbol in the next time slot of the time slot where the first physical channel is located; the last orthogonal frequency division multiplexing symbol in the time slot where the first physical channel is located.

25. The method according to claim 22, characterized in that, The first physical channel is on the second target symbol. When the second communication terminal sends the sidelink shared channel to the first communication terminal, the second communication terminal determines the channel resource of the first physical channel corresponding to the sidelink shared channel through the mapping relationship between the first physical channel and the sidelink shared channel. The channel resources include one or more of the following: time-domain resources; frequency-domain resources.

26. The method of claim 22, wherein, The first physical channel overlaps with the time-frequency resources of the physical sidelink feedback channel used to indicate acknowledgment or negative acknowledgment information, and the cyclic shift of the sequence corresponding to the first physical channel is different from the cyclic shift of the sequence corresponding to the physical sidelink feedback channel.

27. The method of claim 22, wherein, The first physical channel overlaps with the time-frequency resources of the physical sidelink feedback channel used to indicate collision information, and the cyclic shift of the sequence corresponding to the first physical channel is different from the cyclic shift of the sequence corresponding to the physical sidelink feedback channel.

28. The method according to claim 22, characterized in that, The first physical channel simultaneously indicates the hybrid automatic retransmission acknowledgment information and the channel occupancy enable information.

29. The method according to claim 28, characterized in that, The sequence cyclic shift corresponding to the first physical channel is mapped to at least one of the following information: Negative acknowledgment and channel occupancy enabled; negative acknowledgment and channel occupancy disabled; positive acknowledgment and channel occupancy enabled; positive acknowledgment and channel occupancy disabled.

30. The method according to claim 22, characterized in that, The second communication terminal receives the first physical channel, the second physical channel, and the third physical channel in the first time slot; The time corresponding to the first physical channel includes the second target symbol, which includes at least two orthogonal frequency division multiplexing symbols in the first time slot; The time corresponding to the second physical channel and the third physical channel is earlier than the time corresponding to the first physical channel; The last orthogonal frequency division multiplexing (OFDM) symbol of the third physical channel is spaced between the first orthogonal frequency division multiplexing (OFDM) symbol of the first physical channel and the last OFDM symbol of the third physical channel by zero or one OFDM symbol.

31. The method according to claim 30, characterized in that, The sidelink control information located on the second physical channel includes the first part of the shared channel occupancy time information; The first physical channel is used to indicate the second part of the shared channel occupancy time information.

32. The method of claim 22, wherein, The second communication terminal receives the first physical channel in the first time slot, and receives the second physical channel and the third physical channel in the second time slot; The first time slot and the second time slot belong to the same target time slot set. The first time slot and the second time slot are adjacent time slots in the target time slot set, and the first time slot is earlier than the second time slot. The target time slot set is a time slot set corresponding to a side link resource pool.

33. The method according to claim 32, characterized in that, The second communication terminal receives the first physical channel in the first time slot, and the first physical channel is used to indicate the first part of the shared channel occupancy time information; The second communication terminal receives sidelink control information sent by the first communication terminal through the second physical channel in the second time slot. The sidelink control information on the second physical channel includes the second part of the shared channel occupancy time information.

34. The method of any one of claims 30-33, wherein, The second physical channel includes a physical sidelink control channel; the third physical channel includes a physical sidelink shared channel.

35. The method of claim 22, wherein, The shared channel occupancy information includes one or more preset first channel occupancy information.

36. The method of claim 22, wherein, The shared channel occupancy information includes second channel occupancy information configured by one or more higher-layer signaling systems.

37. The method of claim 22, wherein, The shared channel occupancy information includes one or more third channel occupancy information, and each third channel occupancy information has a mapping relationship with the time-frequency resource location of the first physical channel.

38. A first communication terminal, characterized by include: A memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor, when executing the program, implements the method as described in any one of claims 1-23.

39. A second communication terminal, characterized by include: A memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor, when executing the program, implements the method as described in any one of claims 24-28.

40. A storage medium having stored thereon a computer program, characterized in that When the program is executed by the processor, it implements the method as described in any one of claims 1-37.

Images