CN115884427A

CN115884427A - Channel occupation information indication method, communication terminal and storage medium

Info

Publication number: CN115884427A
Application number: CN202210918061.0A
Authority: CN
Inventors: 贺海港; 卢有雄; 胡宇洲; 陈杰
Original assignee: ZTE Corp
Current assignee: ZTE Corp
Priority date: 2022-08-01
Filing date: 2022-08-01
Publication date: 2023-03-31
Also published as: WO2024027604A1

Abstract

The application provides a channel occupation information indication method, a communication terminal and a storage medium. The method comprises the following steps: determining shared channel occupation information, wherein the shared channel occupation information comprises shared channel occupation time information; performing resource mapping of a first physical channel, and copying resource elements mapped by a first channel on a first target symbol onto a previous orthogonal frequency division multiplexing symbol adjacent to the first target symbol, where 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 a time slot of the physical channel; and sending the first physical channel to at least one second communication terminal.

Description

Channel occupation information indicating method, communication terminal and storage medium

Technical Field

The present application relates to the field of communications technologies, and for example, to a channel occupancy information indication method, a communication terminal, and a storage medium.

Background

In the unlicensed spectrum, the terminal performs a channel access procedure to evaluate available channels and then use the channels. On the unlicensed spectrum, a communication terminal using the sidelink technology may perform channel occupation by performing a channel access procedure. After a communication terminal has performed a channel access procedure, it is preferred that the channel is occupied immediately, otherwise the channel is preempted by other communication terminals.

However, the communication terminal using the side link technology can start occupying the channel only at a limited point in time, which results in a situation where the communication terminal of the side link technology is very disadvantageous in channel preemption. Therefore, how to effectively increase the channel occupancy of the communication terminal in the sidelink technique is a technical problem to be solved at present.

Disclosure of Invention

The application provides a channel occupation information indication method, a communication terminal and a storage medium.

The embodiment of the application provides a channel occupation information indication method, which is applied to a first communication terminal and comprises the following steps:

determining shared channel occupation information, wherein the shared channel occupation information comprises shared channel occupation time information;

performing resource mapping of a first physical channel, and copying resource elements mapped by a first channel on a first target symbol onto a previous orthogonal frequency division multiplexing symbol adjacent to the first target symbol, where 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 slot of the first physical channel;

and sending the first physical channel to at least one second communication terminal.

The embodiment of the present application further provides a method for indicating channel occupancy information, which is applied to a second communication terminal, and includes:

receiving a first physical channel sent by a first communication terminal, wherein the first physical channel is used for indicating shared channel occupation information, and the shared channel occupation information comprises shared channel occupation time information;

sending side link information within the shared channel occupation time indicated by the shared channel occupation time information;

the resource mapping of the first physical channel comprises copying resource elements mapped by the first channel on a first target symbol onto a previous orthogonal frequency division multiplexing symbol adjacent to the first target symbol, wherein the first target symbol is an orthogonal frequency division multiplexing symbol in one time slot of the first physical channel.

An embodiment of the present application further provides a first communication terminal, including: a memory, a processor and a computer program stored on the memory and executable on the processor, the processor implementing the above-mentioned channel occupancy information indication method when executing the program.

The embodiment of the present application further provides a second communication terminal, including: a memory, a processor and a computer program stored on the memory and executable on the processor, the processor implementing the above-mentioned channel occupancy information indication method when executing the program.

The embodiment of the present application further provides a storage medium, where a computer program is stored on the computer-readable storage medium, and when the computer program is executed by a processor, the method for indicating channel occupancy information as described above is implemented.

With regard to the above embodiments and other aspects of the present application and implementations thereof, further description is provided in the accompanying drawings description, detailed description and claims.

Drawings

Fig. 1 is a flowchart of a method for indicating channel occupancy information according to an embodiment;

fig. 2 is a flowchart illustrating a method for indicating channel occupancy information according to an embodiment;

fig. 3 is a diagram of a first physical channel according to an embodiment;

fig. 4 is a schematic diagram of a transmission timing of a first physical channel according to an embodiment;

fig. 5 is a schematic diagram illustrating a mapping relationship between a frequency domain position of a first physical channel and a sub-channel according to an embodiment;

fig. 6 is a schematic diagram illustrating a position relationship among a first physical channel, a second physical channel, and a third physical channel according to an embodiment;

fig. 7 is a schematic diagram illustrating another position relationship among a first physical channel, a second physical channel, and a third physical channel according to an embodiment;

FIG. 8 is a diagram illustrating a target timeslot set according to an embodiment;

fig. 9 is a flowchart of another method for indicating channel occupancy information according to an embodiment;

fig. 10 is a flowchart illustrating another method for indicating channel occupancy information according to an embodiment;

fig. 11 is a diagram illustrating a second terminal receiving a first physical channel according to an embodiment;

fig. 12 is a schematic structural diagram of an apparatus for indicating channel occupancy information according to an embodiment;

fig. 13 is a schematic structural diagram of another channel occupancy information indication apparatus according to an embodiment;

fig. 14 is a schematic hardware configuration diagram of a first communication terminal according to an embodiment;

fig. 15 is a schematic hardware structure diagram of a second communication terminal according to an embodiment.

Detailed Description

To make the objects, technical solutions and advantages of the present application more apparent, embodiments of the present application will be described in detail below with reference to the accompanying drawings. It should be noted that the embodiments and features of the embodiments in the present application may be arbitrarily combined with each other without conflict.

The steps illustrated in the flow charts of the figures may be performed in a computer system such as a set of computer-executable instructions. Also, while a logical order is shown in the flow diagrams, in some cases, the steps shown or described may be performed in an order different than here.

In a Sidelink (Sidelink) communication system, when there is a service to be transmitted between User Equipments (UEs), the service between the UEs is directly transmitted to a target UE through the Sidelink by a data source UE without passing through a network side, that is, without passing through the forwarding of a cellular link between the UEs and a base station. Typical applications of edge-link communication include Device-to-Device (D2D) communication and Vehicle networking (V2X) communication. The Vehicle networking communication comprises a Vehicle to Vehicle (V2V), a Vehicle to person (V2P), and a Vehicle to Infrastructure (V2I). For the near field communication users capable of applying the side link communication, the side link communication not only saves wireless spectrum resources, but also reduces the data transmission pressure of a core network, can reduce the occupation of system resources, increases the spectrum efficiency of a cellular communication system, reduces the communication time delay and saves the network operation cost to a great extent.

In the design of current link communication, only ITS (Intelligent Transport System) spectrum and authorized spectrum allocated to network operators are considered, and design for unauthorized spectrum is not considered. In the existing edge link communication, a timeslot may include some edge link channels, and the edge link channels in a timeslot include a Physical link control channel (PSCCH), a Physical link shared channel (PSCCH), and an edge link feedback channel (PSFCH) channel. In addition, one slot also includes an Orthogonal Frequency Division Multiplexing (OFDM) symbol in which no side link channel is transmitted through the entire symbol.

In unlicensed spectrum, information transmission can be performed only in a Listen Before Talk (LBT) successful channel. LBT means that a communication node needs to compete for resources, and the communication node can transmit information on the time-frequency resource only if the time-frequency resource competition succeeds. More specifically, in the LBT mechanism, a communication node performs a channel access procedure before information transmission, and the communication node can perform information transmission only if the channel access is successful. The LBT mechanism is a typical channel access mechanism, and a communication terminal may perform a channel access procedure such as LBT and then perform channel occupation.

For a communication node with successful LBT, a channel with a certain time length may be occupied, which corresponds to a Channel Occupied Time (COT). The time-frequency resource with a certain frequency domain width in the COT time is considered as a resource which is obtained by the communication node through an LBT listening mechanism and is allowed to be used. The time-frequency resource with a certain frequency domain width in the COT can be used by the communication node with successful LBT, or the communication node with successful LBT carries out COT sharing, and the resource is shared to other communication nodes. Other UEs that are successful in COT sharing may use time-frequency resources of a certain frequency domain width within the shared COT.

For the above COT sharing, the current standard protocol only supports the COT sharing of the Uu port, and does not support the COT sharing of the edge link.

To solve the above technical problem, fig. 1 is a flowchart of a method for indicating channel occupancy information according to an embodiment, as shown in fig. 1, the method provided by this embodiment is applicable to a first communication terminal, and includes

steps

110 and 120.

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

In this embodiment, the first communication terminal may be a communication terminal of a side link technology. In the unlicensed spectrum, the communication terminal needs to perform a channel access procedure, i.e., a channel occupancy estimation procedure, to enable the communication terminal to use a channel belonging to the unlicensed spectrum for information transmission. Determining that the shared channel occupation information requires the first communication terminal to execute a channel access process, wherein a successfully accessed channel is an available channel, and the first communication terminal can perform side link transmission on one or more available channels after the channel access is successful. Wherein one available channel may refer to a carrier or a part of a carrier consisting of a set of contiguous resource blocks.

The embodiment does not specifically limit how to determine the shared channel occupancy information. The shared channel occupancy information may be determined based on a channel occupied by the first communication terminal, that is, channel occupancy, where the shared channel occupancy information may be information indicating shared channel occupancy, and the shared channel occupancy may be understood as sharing all or part of the channel occupancy occupied by the channel to other communication terminals.

In this embodiment, the shared channel occupation information may include shared channel occupation time information and shared channel occupation start time; the shared channel occupation information may further include frequency domain resource information and channel access priority information. The shared channel occupation time information may be understood as a time duration, that is, a COT, during which the first communication terminal occupies a channel, and may also be understood as that the first communication terminal can perform channel occupation in the COT.

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

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 in a time slot of the first physical channel.

In this embodiment, the first physical channel may be understood as a physical side link channel for transmitting shared channel occupancy information.

In this embodiment, the resource mapping of the first physical channel may include copying resource elements mapped by the first channel on the first target symbol onto a previous orthogonal frequency division multiplexing symbol adjacent to the first target symbol. It can be understood that the first physical channel is mapped onto at least 2 orthogonal frequency division multiplexing symbols and includes the 2 orthogonal frequency division multiplexing symbols.

In this embodiment, the first physical channel occupies a plurality of resource elements in L ofdm symbols in one timeslot, and the resource elements mapped by the channel on the 2 nd ofdm symbol are copied to the previous ofdm symbol immediately adjacent to the 2 nd ofdm symbol. Wherein L is greater than or equal to 2.

In step 130, the first physical channel is transmitted to at least one second communication terminal.

In this embodiment, the second communication terminal may be a communication terminal of a side link technology. The first communication terminal may transmit the first physical channel to the plurality of communication terminals to cause the plurality of communication terminals to share the channel occupancy. The first communication terminal indicates the shared channel occupation information to other communication terminals by sending the first physical channel, so that the other communication terminals can send the side link information by using the channel determined by the shared channel occupation information.

In this embodiment, the first communication terminal sends the first physical channel may be understood as that after the first terminal maps the generated sequence to the physical resource, the first communication terminal sends the sequence generated by the first communication terminal on the mapped physical resource. The sequence generated by the first communication terminal may be understood as a sequence corresponding to the first physical channel.

In this embodiment, how to transmit the first physical channel to the at least one second communication terminal is not particularly limited.

In this embodiment, after the first communication terminal occupies the channel, the first communication terminal sends the first physical channel to the second communication terminal, and the first physical channel indicates the shared channel occupancy information, so that the second communication terminal can share the channel occupied by the first communication terminal, the channel access success rate of the second communication terminal is improved, and the problem of low channel access success rate of the communication terminal in the sidelink technology is effectively solved.

The following exemplifies a transmission method on the first communication terminal side by various embodiments.

In an example embodiment, a first terminal, i.e., a first communication terminal, performs a channel access procedure; the first terminal determines available Channel occupation and determines Channel Occupancy information, namely shared Channel occupation information, through a Channel access process, wherein the Channel Occupancy information comprises COT (chip time on Channel), namely shared Channel occupation time information.

After the first terminal determines the Channel Occupancy information, the first terminal sends the determined Channel Occupancy information to other terminals, and the other terminals receiving the shared Channel Occupancy information can send sidelink information, namely side link information, by using the Channel determined by the Channel Occupancy information.

A first terminal sends a first physical Channel, and indicates other terminals to share Channel Occupancy information in a form of sending the first physical Channel, wherein the Channel Occupancy information comprises COT information; the first physical channel may include the following features:

the first physical channel occupies a plurality of resource elements in L orthogonal frequency division multiplexing OFDM symbols in a time slot, and the resource elements mapped by a target channel on a 2 nd OFDM symbol are copied to a previous OFDM symbol adjacent to the 2 nd OFDM symbol, wherein L is more than or equal to 2.

Fig. 2 is an exemplary flowchart of a method for indicating channel occupancy information according to an embodiment, as shown in fig. 2, including the following steps: step 1, executing a channel access process; step 2, determining channel occupation information; and step 3, sending a first physical Channel, wherein the first physical Channel is used for indicating the shared Channel Occupancy information.

The first terminal performs a channel access procedure to assess the availability of one or more channels. The one or more channel availability may refer to whether the first terminal may transmit on one or more channels. A channel may refer to a carrier or a portion of a carrier that consists of a set of contiguous Resource Blocks (RBs). When the evaluation result is that one or more channels are available, it means that the first terminal is available to occupy the one or more channels, i.e. the first terminal is available to perform side link transmission on the one or more channels. The first terminal determines channel occupancy information. When a first terminal evaluates that one or more channels are available, the time that the first terminal may occupy the one or more channels is referred to as the COT. Within the COT, the first terminal may engage in channel occupancy. The channel occupancy information determined by the first terminal may include, in addition to the COT information, a COT start time, an available resource block set, CAPC information, that is, channel access priority information, and the like. The set of available resource blocks here limits the frequency domain range of the channel occupied by the first terminal. The first terminal sends a first physical channel, and the first physical channel is used for sending channel copy information. After obtaining the channel occupation, the first terminal shares all or part of the channel occupation occupied by the channel to other terminals, and the channel occupation shared to other terminals is called shared channel occupation.

The first terminal is used for indicating the information of the shared channel copy by sending the first physical channel. The information of the shared channel allocation may include a shared COT, for example, the information of the shared channel allocation includes a COT (COT duration) and a COT start time. The information of the shared channel copy may also include COT start time, available resource block set, frequency domain resource allocation information, CAPC information, and the like. The available resource block set limits the frequency domain range occupied by the shared channel, and the frequency domain resource allocation information is used for determining the frequency domain resources allocated to other terminals in the available resource block set. The CAPC information can be used for other terminals sharing the channel occupation, and the COT and other information can be determined through the CAPC information. Table 1 is a table of a relationship between a channel access priority and a channel occupation time of a shared channel provided in an embodiment, as shown in table 1, when the channel access priority is 1, the channel occupation time of the shared channel is 2ms; when the channel access priority is 2, the channel occupation time of the shared channel is 3ms; when the channel access priority is 3 or 4, the channel occupation time of the shared channel is 8ms or 10ms.

TABLE 1

Channel access priority (p)	Channel occupancy time for shared channels
		1	2ms
2	3ms
		3	8ms or 10ms
4	8ms or 10ms

A first physical channel transmitted by a first terminal, comprising the following features: the first physical channel occupies a plurality of resource elements in L orthogonal frequency division multiplexing OFDM symbols in a time slot, and the resource elements mapped by the target channel on the 2 nd OFDM symbol are copied to the previous OFDM symbol adjacent to the 2 nd OFDM symbol. Wherein L is greater than or equal to 2.

Fig. 3 is a schematic diagram of a first physical channel provided in an embodiment, when L =2, the first physical channel is as shown in fig. 3, and in fig. 3, the first physical channel is located on OFDM symbols numbered 11 and 12 in one slot. The resource elements mapped by the first physical channel on the 2 nd OFDM symbol of the first physical channel are copied to the immediately previous OFDM symbol, so that the modulation symbols mapped on the resource elements mapped on the first symbol on the first physical channel can be determined.

In an example embodiment, a first communication terminal sends a first physical Channel, and indicates to other communication terminals to share Channel Occupancy information by sending the first physical Channel form, wherein the Channel Occupancy information includes COT information. The resource mapping of the first physical channel by the first communication terminal may include: the first physical channel is mapped to L =2 OFDM symbols, and the first physical channel mapping is mapped to the 3 rd last and 2 nd OFDM symbols within one slot n.

In the unlicensed spectrum, a channel access procedure needs to be performed for communication to allow the communication node to use a channel belonging to the unlicensed spectrum for information transmission. In order to enable the second communication terminal to use the channel belonging to the unlicensed spectrum for information transmission, the first communication terminal may also assist the second communication terminal in performing channel preemption in addition to the fact that the second communication terminal itself may perform a channel access procedure for performing channel preemption. The first communication terminal executes a channel access process before transmitting the first physical channel, and performs channel preemption through the channel access process. After preempting the channel, in the time slot n, the first physical channel is sent to occupy the channel, and at the same time, the first communication terminal indicates the shared channel occupancy information by sending the first physical channel, and shares the channel to be preempted to the second communication terminal by indicating the shared channel occupancy information. After the first communication terminal shares the channel preempted by the first communication terminal to the second communication terminal, the second communication terminal may use the channel indicated as shared by the first communication terminal for transmission of the side link channel and/or the side link signal in the time slot n +1.

Between the first OFDM symbol of slot n +1 and the first physical channel there is also one OFDM symbol. To avoid preemption of the channel by other communication nodes during this period, edge link channels and/or edge link signals may be transmitted by the first communication terminal over the symbol to avoid preemption of the channel by other communication nodes during this period.

In an embodiment, the first physical channel occupies at least two orthogonal frequency division multiplexing symbols in one time slot, and the first target symbol includes a second orthogonal frequency division multiplexing symbol of the at least two orthogonal frequency division multiplexing symbols.

In this embodiment, the first target symbol may include a second ofdm symbol of at least two ofdm symbols occupied in one slot of the first physical channel.

In an embodiment, the first physical channel comprises a physical edge link feedback channel.

In this embodiment, the first physical channel may include a physical side link feedback channel in one time slot, and the first physical channel may be a physical side link feedback channel for indicating channel occupancy information.

In an embodiment, before sending the first physical channel to the at least one second communication terminal, the method further includes: receiving a physical side link shared channel sent by at least one second communication terminal; determining channel resources of a first physical channel based on a mapping relation between the first physical channel and the side link shared channel;

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

In an example embodiment, a first communication terminal sends a first physical Channel to at least one second communication terminal, and indicates Channel Occupancy information to other terminals by sending the first physical Channel, wherein the Channel Occupancy information includes COT information; the first communication terminal receives the PSSCH sent by the second communication terminal and determines time domain and/or frequency domain resources of the first physical channel based on the mapping relation between the first physical channel and the PSSCH.

The mapping relationship existing between the first physical channel and the edge link shared channel may include at least one of:

in the time domain, the first physical channel transmission timing is mapped to at least one candidate psch transmissions, i.e., edge link shared channel transmission timing.

In the time domain, the first physical channel transmission is mapped to at least one candidate PSSCH transmission opportunity.

In the frequency domain, a mapping relation exists between the frequency domain position of the first physical channel and the sub-channel.

In an embodiment, in the time domain, the first physical channel transmission opportunity is mapped to at least one psch transmissions opportunity, i.e., a side link shared channel transmission opportunity, which may also be referred to as a candidate side link shared channel transmission opportunity.

Fig. 4 is a schematic diagram of a first physical channel transmission timing according to an embodiment, where in fig. 4, there are 11 psch transmission timings. In fig. 4, each first physical channel transmission opportunity includes 2 OFDM symbols, which are the second last OFDM symbol and the third OFDM symbol in one slot. Within each first physical channel transmission time, one or more time-frequency resources may be included that may be used for transmission of the first physical channel. A first physical channel transmission occasion mapped to at least one PSSCH transmission occasion. Mapping of a first physical channel transmission occasion to N psch transmission occasions means that a first physical channel transmission occasion includes one or more frequency domain resources available for transmission of a first physical channel, each frequency domain resource available for transmission of the first physical channel is mapped to a psch transmission occasion, and one slot includes one or more all frequency domain resources available for transmission of the first physical channel, for a total of N psch transmission occasions. In fig. 4, each first physical channel transmission opportunity maps to N =4 psch transmission opportunities greater than a time threshold. The first physical channel transmission opportunity corresponding to slot 6 is mapped to N =4 psch transmission opportunities, which are 4 psch transmission opportunities corresponding to slot {1,2,3,4 }. The first physical channel transmission opportunity corresponding to slot 10 is mapped to N =4 psch transmission opportunities, which are 4 psch transmission opportunities corresponding to slot {5,6,7,8 }. The first terminal receives the psch transmitted by the second terminal, and may determine the transmission timing of the first physical channel according to the mapping relationship between the first physical channel and the transmission timing of the psch described above.

In one embodiment, in the time domain, the first physical channel transmission is mapped to at least one candidate PSSCH transmission occasion. The mapping of the first physical channel transmission to the N candidate psch transmissions occasions refers to one first physical channel or one time-frequency resource available for the first physical channel transmission, which is mapped to the N candidate psch transmissions occasions. The first terminal receives the PSSCH transmitted by the second terminal, and determines the transmission timing of the first physical channel according to the mapping relation between the first physical channel and the PSSCH transmissions timing described above.

In an embodiment, a mapping relationship exists between the frequency domain position of the first physical channel and the sub-channel. One subchannel is a frequency domain resource unit, and one subchannel includes a plurality of resource blocks. Slot n includes a first physical channel transmission opportunity comprising one or more frequency domain resources available for transmission of a first physical channel. Wherein each frequency domain resource available for transmitting the first physical channel has a mapping relation with one sub-channel.

Fig. 5 is a schematic diagram illustrating a mapping relationship between a frequency domain location of a first physical channel and a sub-channel according to an embodiment, where in fig. 5, the first physical channel is a PSFCH used for indicating channel occupancy information. The frequency domain resources that may be used for transmission of the first physical channel in slot n comprise 4 sets of resources, each set comprising 2 frequency domain resources available for transmission of the first physical channel. The numbers of the 4 groups of resources are respectively f _1,1 ,f _2,1 ,f _1,2 ,f _2,2 . The time slot n-K-1 and the time slot n-K comprise 4 sub-channels, the number of which is t _1,1 ,t _2,1 ,t _1,2 ,t _2,2 . Wherein the number is f _1,1 Resource group and number t _1,1 Has a mapping relation; number f _2,1 Resource group and number t _2,1 Has a mapping relation; number f _1,2 Resource group and number t _1,2 Has a mapping relation; number f _2,2 Resource group and number t _2,2 Have a mapping relationship. The first terminal receives the PSSCH sent by the second terminal, and determines the time-frequency resource transmitted by the first physical channel according to the mapping relationship between the first physical channel and the sub-channel described above. For example, the PSSCH received by the first terminal and transmitted by the second terminal is located in slot n + K-1 and numbered t _1,1 And t _1,2 The first terminal may determine the frequency domain resources of the first physical channel based on a first subchannel among a plurality of subchannels corresponding to the psch. I.e. the first terminal is according to the number t _1,1 May determine the frequency domain resource of the first physical channel as the f < th > channel _1,1 One of the set of frequency domain resources.

In an embodiment, a first physical channel overlaps with time-frequency resources of a physical side link feedback channel used for indicating acknowledgement information or negative acknowledgement information, and a cyclic shift of a sequence corresponding to the first physical channel is different from a cyclic shift of a sequence corresponding to the physical side link feedback channel.

In this embodiment, when the physical resource mapped by the first physical channel is the same as the time-frequency resource of the physical side link feedback channel used for indicating the acknowledgment information or the negative acknowledgment information, the sequence cyclic shift of the sequence corresponding to the first physical channel is different from the sequence corresponding to the physical side link feedback channel used for indicating the acknowledgment information or the negative acknowledgment information.

In this embodiment, after the first communication terminal sends the first physical channel to the second communication terminal, the second communication terminal may distinguish whether the first physical channel is the first physical channel or the physical side link feedback channel for indicating the acknowledgement information or the negative acknowledgement information based on the cyclic shift of the received sequence.

In an embodiment, the first physical channel overlaps with a time-frequency resource of a physical side link feedback channel for indicating collision information, and a cyclic shift of a sequence corresponding to the first physical channel is different from a cyclic shift of a sequence corresponding to the physical side link feedback channel.

In this embodiment, when the physical resource mapped by the first physical channel is the same as the time-frequency resource of the physical side link feedback channel for indicating the collision information, 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 side link feedback channel for indicating the collision information.

In this embodiment, after the first communication terminal sends the first physical channel to the second communication terminal, the second communication terminal may distinguish whether the first physical channel is the first physical channel or the physical side link feedback channel for indicating the collision information based on the cyclic shift of the received sequence. The collision information may be understood as collision information of time-frequency resources.

In an embodiment, the first physical channel indicates both hybrid automatic repeat request acknowledgement information and channel occupancy enabling information.

In this embodiment, the harq acknowledgement information and the channel occupancy enable information are simultaneously indicated by sending the first physical channel.

In this embodiment, the harq acknowledgement information may include a positive acknowledgement state and a negative acknowledgement state. The channel occupation enabling information can be understood as COT enabling information and can also be understood as channel occupation opening information; the channel occupation enabling information may include both channel occupation enabling and channel occupation disabling information, or the channel occupation enabling information may include both channel occupation time enabling and channel occupation time disabling information. The channel occupancy enable and the information occupancy time enable characterise that the first communication terminal shares the channel occupied by the channel access procedure to the other communication terminal.

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

negative acknowledgement and channel occupancy enable; negative acknowledgement and channel occupancy are not enabled; positive acknowledgement and channel occupancy enable; positive acknowledgements and channel occupancy are not enabled.

In this embodiment, the first physical channel corresponds to one sequence, the sequence cyclic shift corresponding to the sequence belongs to one of four sequence cyclic shifts, and the four sequence cyclic shifts are mapped respectively with or without qualitative confirmation and channel occupation enabling, negative confirmation and channel occupation disabling, positive confirmation and channel occupation enabling, and positive confirmation and channel occupation disabling.

In an example embodiment, a first terminal sends a first physical Channel, and indicates other terminals to share Channel Occupancy information by sending the first physical Channel, wherein the Channel Occupancy information includes COT information; the first physical channel includes at least one of:

the first physical channel is overlapped with time-frequency resources of PSFCH (physical edge link feedback channel) which is used for indicating ACK/NACK (acknowledgement/negative acknowledgement) information, namely positive acknowledgement information or negative acknowledgement information, and the cyclic shift of a sequence corresponding to the first physical channel is different from the cyclic shift of a sequence corresponding to the PSFCH;

the first physical channel overlaps with time-frequency resources of a PSFCH used for indicating the existence of the conflict information, and the cyclic shift of a sequence corresponding to the first physical channel is different from the cyclic shift of a sequence corresponding to the PSFCH.

The first terminal generates a sequence before transmitting the first physical channel, where a sequence is understood to be a set of data or a set of modulation symbols generated according to a certain rule and having a permutation order. The first terminal generates a sequence, which may have a cyclic shift, before transmitting the first physical channel. Assuming that a sequence a having a length of N =10 is [1,2,3,4,5,6,7,8,9,10], a sequence B obtained by cyclically shifting a by 2 is [9,10,1,2,3,4,5,6,7,8], or a sequence B obtained by cyclically shifting a by 2 is [3,4,5,6,7,8,9,10,1,2].

The first terminal maps the generated sequence to the physical resource, and the first terminal transmits the generated sequence on the mapped physical resource, which may be referred to as the first terminal transmitting the first physical channel. The generated sequence is a sequence corresponding to the first physical channel. The time-frequency resource of the first physical channel is the physical resource mapped by the sequence corresponding to the first physical channel.

When the physical resource mapped by the first physical channel is the same as the time-frequency resource of the PSFCH for indicating the ACK/NACK information, the sequence cyclic shift of the sequence corresponding to the first physical channel is different from the sequence corresponding to the PSFCH for indicating the ACK/NACK information. After the first terminal transmits the first physical channel, the second terminal distinguishes whether it is the first physical channel or the PSFCH indicating ACK/NACK information based on the cyclic shift of the received sequence.

When the physical resource mapped by the first physical channel is the same as the time-frequency resource of the PSFCH used for indicating the conflict information, the sequence cyclic shift of the sequence corresponding to the first physical channel is different from the sequence corresponding to the PSFCH used for indicating the conflict information. After the first terminal transmits the first physical channel, the second terminal distinguishes whether it is the first physical channel or the PSFCH indicating the collision information based on the cyclic shift of the received sequence.

In an example embodiment, the first terminal simultaneously indicates HARQ-ACK information and channel occupation enabling information by transmitting a first physical channel. The channel occupancy enabling information may also be referred to as COT enabling information, and may also be referred to as channel occupancy opening information. The HARQ-ACK information may include two states, ACK and NACK. The channel occupation enabling information may include two types of information, channel occupation enabling and channel occupation disabling; alternatively, the channel occupation enabling information may include both channel occupation time enabling and channel occupation time disabling information. The channel occupation enable or the channel occupation time enable means that the first terminal shares a channel, which is determined through a channel access procedure, with the other terminals.

The first physical channel corresponds to a sequence, the cyclic shift of the sequence corresponding to the sequence belongs to one of 4 cyclic shifts of the sequence, and the 4 cyclic shifts of the sequence are respectively mapped with the following 4 pieces of information:

ACK, channel occupation enabling, namely affirmatively confirming and enabling;

NACK, channel occupancy enable, negative acknowledgement and channel occupancy enable;

ACK, confirming that the channel occupation is not enabled, namely affirmatively confirming that the channel occupation is not enabled;

NACK, channel occupancy not enabled, i.e. negative acknowledgement and channel occupancy not enabled;

in an embodiment, the first communication terminal and the at least one second communication terminal belong to the same user group.

In this embodiment, the first communication terminal and the second communication terminal belong to the same user group, which means that the channel preempted by the first communication terminal can only be shared with the second communication terminal in the same user group.

In an embodiment, when the at least one second communication terminal includes one second communication terminal, the first communication terminal transmits the first physical channel to the second communication terminal in a unicast manner.

In this embodiment, a first communication terminal sends a first physical channel to at least one second communication terminal, and when the at least one second communication terminal only includes one second communication terminal, it indicates that the first communication terminal and the second communication terminal establish a unicast transmission mode communication connection, and the first communication terminal may only preempt a channel for the second communication terminal having a unicast communication connection relationship, and notify shared channel occupation information. The unicast mode may be understood as a unicast mode.

In an embodiment, the first physical channel is used to indicate cooperation information, and the cooperation information includes shared channel occupation time.

In this embodiment, the first communication terminal sends the first physical channel to at least one second communication terminal, and indicates the cooperation information through the first physical channel, where the cooperation information may include the shared channel occupation time.

In this embodiment, after a first communication terminal occupies a channel, the occupied channel may be shared with other communication terminals, and here, no matter whether the other communication terminals establish a communication connection with the first communication terminal or not, and whether the other communication terminals belong to the same user group as the first communication terminal, a second communication terminal that receives a first physical channel sent by the first communication terminal may use the channel occupied by the first communication terminal, that is, the channel shared by the first communication terminal to the second communication terminal.

In an example embodiment, a first terminal sends a first physical Channel, and indicates other terminals to share Channel Occupancy information by sending the first physical Channel, wherein the Channel Occupancy information includes COT information; the first terminal sends a first physical channel to at least one UE, i.e. at least one second communication terminal, comprising at least one of:

a first terminal sends a first physical channel to at least one UE, wherein the first terminal and the at least one UE belong to the same UE group;

a first terminal sends a first physical channel to at least one UE, wherein the at least one UE only comprises a second terminal, and the first terminal sends the first physical channel to the second UE in a unicast mode;

the method comprises the steps that a first terminal sends a first physical channel to at least one UE, and cooperation information is indicated through the first physical channel and comprises COT information.

The first terminal helps other terminals to preempt the channel, and in order to preempt the channel, the first terminal executes a channel access process. The first terminal accesses the channel through the channel access process, which means that the first terminal successfully preempts the corresponding channel. The first terminal indicates information of a corresponding preemption Channel (Channel Occupancy) by sending the first physical Channel.

The second terminal determines Channel Occupancy information by receiving the first physical Channel sent by the first terminal, and the Channel Occupancy information is used for the second terminal to determine parameters which can use the corresponding Channel (preemption Channel). The Channel Occupancy information may include the COT duration, the COT start time, which Channel or channels the respective Channel(s) (the preempted Channel) are, etc.

When the first terminal and the second terminal belong to the same group of UEs, that is, the same user group, it means that the channel occupied by the first terminal can only be shared with UEs in the same UE group.

The first terminal sends the first physical channel to at least one UE, when the at least one UE only comprises the second terminal, the first terminal and the second terminal establish a unified communication connection, and the first terminal can only preempt the channel for the UE with the unified communication connection relation and inform the parameters of channel occupation (shared channel) corresponding to the preempted channel.

The first terminal sends a first physical channel to at least one UE, and the cooperation information is indicated through the first physical channel. After the first terminal preempts the channel, the preempted channel can be shared by other UEs, no matter whether the UEs establish communication connection with the first terminal or not, the UEs belong to the same UE group with the first terminal or not. The UE that receives the first physical channel transmitted by the first terminal may use a channel (shared channel) that the first terminal preempts.

In one embodiment, the first communication terminal transmits the first physical channel, the second physical channel and the third physical channel on the same time slot;

the time corresponding to the first physical channel comprises a second target symbol, and the second target symbol comprises 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;

zero or one orthogonal frequency division multiplexing symbol is arranged between the last orthogonal frequency division multiplexing symbol of the third physical channel and the first orthogonal frequency division multiplexing symbol of the first physical channel.

In this embodiment, the first communication terminal may further send a second physical channel and a third physical channel, where the second physical channel and the third physical channel sent by the first communication terminal are located in the same time slot as the first physical channel sent by the first communication terminal.

In this embodiment, the second target symbol may include two orthogonal frequency division multiplexing symbols, and the second target symbol may be a second to last orthogonal frequency division multiplexing symbol and a third to last orthogonal frequency division multiplexing symbol in the same time slot.

In this embodiment, the ofdm symbol in the same time slot occupied by the second physical channel and the third physical channel is located before the ofdm symbol in the same time slot occupied by the first physical channel.

In this embodiment, zero or one ofdm symbol is spaced between the ofdm symbol in the same time slot occupied by the third physical channel and the first ofdm symbol in the same time slot occupied by the first physical channel.

In this embodiment, the side link control information located on the second physical channel includes the first part of the shared channel occupation time information; the first physical channel is used for indicating a second part of information in the shared channel occupation time information.

In this embodiment, the first communication terminal may indicate the shared channel occupancy information by one of the following manners:

indicating shared channel occupation information through a first physical channel, wherein side link control information sent by a first communication terminal does not include the shared channel occupation information; the method includes sending side link control information through a sending physical side link control channel, wherein the side link control information may include a first part of information in shared channel occupation time information, and sending a first physical channel, and the first physical channel is used for indicating a second part of information in the shared channel occupation time information.

In this embodiment, the first part of information in the shared channel occupation time information may include one or more of the following:

duration of channel occupancy; sharing available resource block set corresponding to the channel; a channel access priority.

In this embodiment, the second part of information in the shared channel occupation time information may include one or more of the following:

a starting time of channel occupancy; enabling shared channel occupancy; opening the occupation of the shared channel; enabling COT corresponding to the shared channel; and opening the COT corresponding to the shared channel.

In an example embodiment, a first terminal sends a first physical Channel, and the first terminal indicates to other terminals to share Channel Occupancy information by sending the first physical Channel, where the Channel Occupancy information includes COT information;

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

Fig. 6 is a schematic diagram of a position relationship among the first physical channel, the second physical channel, and the third physical channel according to an embodiment. In fig. 6, the first physical channel occupies the OFDM symbols numbered 11,12 in slot n. The OFDM symbols numbered 1 to 9 in slot n include the PSCCH and pscsch transmitted by the first terminal. The second physical channel PSCCH may be mapped to OFDM symbols numbered 1 and 2, and may also be mapped to OFDM symbols numbered 1,2, and 3. Among the OFDM symbols mapped by the third physical channel pscch, the last OFDM symbol is an OFDM symbol numbered 9. The last symbol of the psch (OFDM symbol numbered 9) is separated from the first symbol of the first physical channel (OFDM symbol numbered 11) by one OFDM symbol numbered 10.

The first terminal indicates the shared channel occupation information by adopting one of the following modes:

in the method 1, the shared channel occupation information is indicated through the first physical channel, and the SCI, i.e., the side link control information sent by the first terminal does not include the shared channel occupation information.

Mode 2, the mode of indicating the shared channel occupancy information by the first terminal includes:

the first terminal transmits SCI through transmitting PSCCH, wherein the SCI comprises a first part of information in COT sharing information;

and the first terminal sends the first physical channel, wherein the first physical channel is used for indicating the second part of information in the COT shared information.

In one embodiment, a first communication terminal transmits a first physical channel on a first time slot, and the first communication terminal transmits a second physical channel and a third physical channel on a second time slot;

the first time slot and the second time slot belong to a 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 one side link resource pool.

In this embodiment, the first communication terminal may transmit the first physical channel, the second physical channel, and the third physical channel on different time slots, and the second physical channel and the third physical channel may transmit on the same time slot. An edge link resource pool refers to a set of time domain resources that may be used for edge link communications, or a set of time frequency resources that may be used for edge link communications.

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

In this embodiment, the first communication terminal may transmit the first physical channel on at least two orthogonal frequency division multiplexing symbols of the first slot.

In this embodiment, the first communication terminal may 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.

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

indicating shared channel occupation information through a first physical channel, wherein side link control information sent by a first communication terminal does not include the shared channel occupation information; the method comprises the steps of sending side link control information through a sending physical side link control channel, wherein the side link control information can comprise a second part of information in shared channel occupation time information, and sending a first physical channel, and the first physical channel is used for indicating a first part of information in the shared channel occupation time information.

Wherein the second physical channel comprises a physical edge link control channel; the third physical channel comprises a physical edge link shared channel.

In one embodiment, the second physical channel may be a physical edge link control channel.

In one embodiment, the third physical channel may be a physical edge link shared channel.

In an example embodiment, a first terminal sends a first physical Channel, and the first terminal may indicate shared Channel Occupancy information to other terminals by sending the first physical Channel, where the Channel Occupancy information includes shared COT information; and the first terminal transmits the PSCCH, i.e., the second physical channel, and the PSCCH, i.e., the third physical channel. The first terminal transmitting a first physical channel in slot n and PSCCH in slot m, comprising:

a first terminal sends a first physical channel on at least two orthogonal frequency division multiplexing symbols of a time slot n;

the PSCCH transmitted by the first terminal on the time slot m is transmitted from the first orthogonal frequency division multiplexing symbol of the time slot m or from the second orthogonal frequency division multiplexing symbol of the time slot m;

the time slot n and the time slot m belong to a target time slot set, and are two adjacent time slots in the target time slot set, and the time slot n is positioned before the time slot m;

the target time set is a time slot set corresponding to a Silelink resource pool.

Fig. 7 is a schematic diagram illustrating another positional relationship among the first physical channel, the second physical channel, and the third physical channel according to an embodiment. In fig. 7, the OFDM symbols occupied by the first physical channel transmitted by the first terminal include OFDM symbols numbered 11 and 12 in slot n. And the first terminal transmits the PSCCH and pscsch in slot m. Where the PSCCH starts from the second symbol of slot m and the PSCCH is mapped to OFDM symbols numbered 1,2 or to OFDM symbols numbered 1,2, 3. The PSSCH is mapped to either OFDM symbols 3-13, 4-13 or 1-13. In fig. 7, some modulation symbols mapped on the OFDM symbol numbered 1 in the slot m are copied to the OFDM symbol numbered 0 in the slot m. Some time domain information mapped on the OFDM symbol numbered 1 in the slot m is copied to the last OFDM symbol in the slot n, or some time domain information mapped on the OFDM symbol numbered 12 in the slot n is copied to the last OFDM symbol in the slot n. And, slot n and slot m belong to a target set of slots, which is numbered {1,3,5,6,8,9,11,12, p, n, m, q }. The time slot set with the number of {1,3,5,6,8,9,11,12, p, n, m, q } is a time slot corresponding to one Sidelink resource pool. In fig. 7, m = n +1.

The first terminal indicates the shared channel occupation information in one of the following ways:

Mode 2, the mode of the first terminal indicating the shared channel occupancy information includes:

the first terminal sends SCI through sending PSCCH, wherein the SCI comprises a second part of information in COT sharing information;

and the first terminal sends the first physical channel, wherein the first physical channel is used for indicating the first part of information in the COT shared information.

In an embodiment, the shared channel occupancy information includes one or more of:

duration of channel occupancy; a channel occupancy time; a starting time of channel occupancy; allocating frequency domain resources; sharing available resource block set corresponding to the channel; a channel access priority.

In this embodiment, a first communication terminal indicates shared channel occupancy information to at least one second communication terminal, where the shared channel occupancy information may include duration of channel occupancy; a channel occupancy time; a starting time of channel occupancy; allocating frequency domain resources; sharing available resource block set corresponding to the channel; one or more of the channel access priorities.

In an embodiment, the at least one communication terminal comprises a second communication terminal, and accordingly, when the first communication terminal transmits the first physical channel to the second communication terminal on the first time slot, one or more of the following conditions are satisfied:

the side link control information sent by the second communication terminal and received by the first communication terminal in the third time slot reserves time-frequency resources on the second time slot;

the first time slot and the second time slot belong to a 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 third time slot is earlier than the second time slot.

In this embodiment, the time domain resource on the second time slot is reserved in the side link control information sent by the second communication terminal, which may be understood as that at least a part of the time frequency resource in the time frequency resource indicated by the side link control information sent by the second communication terminal is located on the second time slot.

In this embodiment, the first timeslot and the second timeslot are two timeslots immediately adjacent to each other in the target timeslot set, and the first timeslot is located before the second timeslot. The second communication terminal reserves the time-frequency resource on the second time slot through the side link control information, and aims to enable the second communication terminal to use the reserved time-frequency resource on the second time slot to send side link channels and/or side link signals. However, since the channel belongs to the unlicensed spectrum, a channel access procedure needs to be performed to allow the second communication terminal to transmit the sidelink channel and/or sidelink signal using the reserved time-frequency resources on the second time slot.

In an example embodiment, a first terminal sends a first physical Channel, and the first terminal may indicate, to other terminals, shared Channel Occupancy information by sending the first physical Channel, where the Channel Occupancy information includes shared COT information. The first terminal transmits a first physical channel to at least one terminal in a time slot n (i.e., a first time slot), the at least one terminal including a second terminal, and the condition for the first terminal to transmit the first physical channel in the time slot n includes:

the SCI (i.e. the side link control information) sent by the second terminal and received by the first terminal in the time slot Q (i.e. the third time slot) reserves a time-frequency resource in the time slot m (i.e. the second time slot);

the time slot n and the time slot m are two time slots which are adjacent in a target time slot set, and the time slot n is positioned before the time slot m.

The time slot Q is located before the time slot m.

Fig. 8 is a schematic diagram of a target timeslot set according to an embodiment, where, as shown in fig. 8, timeslot n and timeslot m are two timeslots immediately adjacent in the target timeslot set, and timeslot n is located before timeslot m. In order to increase the channel occupation probability, the first terminal may also assist the second terminal in performing channel preemption in addition to the second terminal itself performing the channel access procedure. The first terminal executes a channel access process before sending the first physical channel, and performs channel preemption through the channel access process. After the first terminal occupies the channel, the first terminal may occupy the channel by sending the first physical channel (to avoid occupying the channel by other communication nodes), and meanwhile, the first terminal may indicate channel occupation information by sending the first physical channel, and share the occupied channel to the second terminal by indicating the channel occupation information (i.e., sharing the channel occupation information). After receiving a first physical channel sent by a first terminal and used for indicating channel occupation information, a second terminal determines some parameters (namely shared channel occupation information) for carrying out channel occupation, and occupies or uses a channel preempted by the first terminal based on the parameters.

In fig. 8, starting from the first OFDM symbol of slot m, the second terminal has access to the channel that the first terminal has preempted for. Between the first OFDM symbol of slot m and the first physical channel, there is also one OFDM symbol. To avoid preemption of the channel by other communication nodes during this period, the edge link channel and/or the shared signal may optionally be transmitted by the first terminal on the symbol to avoid preemption of the channel by other communication nodes during this period.

In an embodiment, the shared channel occupancy information includes one or more preset first channel occupancy information.

In this embodiment, the first channel occupancy information may be understood as one or more preset channel occupancy information. The first channel occupation information is preset, so that the duration of channel occupation included in the first channel occupation information is long; a channel occupancy time; a starting time of channel occupancy; allocating frequency domain resources; sharing available resource block set corresponding to the channel; one or more of the channel access priorities are preset.

In this embodiment, the duration of channel occupation and the channel occupation time included in the first channel occupation information are preset, which may be understood as indicating that the duration of channel occupation or the channel occupation time is a fixed value, for example, the duration of channel occupation or the channel occupation time is 8ms; the starting time of channel occupation included in the first channel occupation information is preset, which can be understood that a time interval between the COT starting time and the ending symbol position of the first physical channel is a fixed value, for example, the time interval between the COT starting time and the ending symbol position of the first physical channel is fixed to 1 OFDM symbol; the frequency domain resource allocation included in the first channel occupancy information is preset, which can be understood that there is a fixed relationship between the frequency domain resource allocation and the first physical channel, for example, the frequency domain resource allocation is the frequency domain resource allocation in which the first physical channel is located; the available resource block set corresponding to the shared channel is preset, which can be understood that the frequency domain position and the frequency domain resource block number of the available resource block set corresponding to the shared channel in the available resource block set corresponding to the shared channel to which the available resource block set belongs are fixed; the channel access priority is preset, which may be understood as that the channel access priority is a fixed value, for example, the channel access priority is 1, which indicates that the first physical channel only corresponds to a channel access priority value, and the value may be a fixed, pre-known value.

In an embodiment, the shared channel occupancy information comprises second channel occupancy information of one or more higher layer signaling configurations.

In this embodiment, the second channel occupancy information may be understood as channel occupancy information configured by one or more higher layer signaling. The duration of channel occupation included in the second channel occupation information; a channel occupancy time; a starting time of channel occupancy; allocating frequency domain resources; sharing available resource block set corresponding to the channel; one or more of the channel access priorities are configured by one or more higher layer signaling.

In this embodiment, the duration of channel occupation or the channel occupation time included in the second channel occupation information is configured by the higher layer signaling, and may be understood as a value of the duration of channel occupation configured by the higher layer signaling or a value of channel occupation time configured by the higher layer information. When the second communication terminal receives the first physical channel, the second communication terminal defaults that the value of the duration time occupied by the channel indicated by the second communication terminal is equal to the value of the duration time occupied by the channel configured by the high-level signaling, or defaults that the value of the channel occupied time indicated by the second communication terminal is equal to the value of the channel occupied time configured by the high-level signaling; the starting time of the channel occupation is the starting time of the higher layer signaling configuration, which can be understood as the channel occupation configured by signaling. The high-level signaling configures the starting time occupied by the channel in a manner that the starting time occupied by the channel and the ending symbol position of the first physical channel are configured for the high-level signaling; the available resource block set included in the second channel occupancy information is configured by the high-level signaling, which can be understood as the relationship between the available resource block set indicated by the high-level signaling and the frequency domain position of the first physical channel; the frequency domain resource allocation corresponding to the shared channel included in the second channel occupation information is configured by the high-level signaling, which can be understood as configuring a frequency domain resource set by the high-level signaling, and the configured frequency domain resource is the actually used frequency domain resource in the available resource block set; the channel access priority included in the second channel occupancy information is a value that can be understood as a channel access priority configured by the higher layer signaling, where the channel access priority configured by the higher layer signaling is, for example, 1, and after receiving the first physical channel, the second communication terminal may default that the value of the channel access priority indicated by the second communication terminal is the value configured by the higher layer signaling, that is, the channel access priority is 1.

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

In this embodiment, the third channel occupancy information may be understood as channel occupancy information having 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: duration of channel occupancy; a channel occupancy time; a starting time of channel occupancy; allocating frequency domain resources; sharing available resource block set corresponding to the channel; a channel access priority.

In this embodiment, the sending and receiving of the first physical channel may include a plurality of selectable time-frequency resource locations, and each time-frequency resource location has a mapping relationship with the duration occupied by one channel, the channel occupation time, the starting time occupied by the channel, the frequency domain resource allocation, the available resource block set corresponding to the shared channel, and the channel access priority, so that after the second communication terminal receives the first physical channel sent by the first communication terminal, the value of the duration occupied by the channel, the value of the channel occupation time, the value of the starting time occupied by the channel, the frequency domain resource allocation, the available resource block set corresponding to the shared channel, and the value of the channel access priority may be determined according to the time-frequency resource location of the first physical channel.

In an example embodiment, a first terminal sends a first physical Channel, and the first terminal may indicate, to other terminals, shared Channel Occupancy information by sending the first physical Channel, where the Channel Occupancy information may include COT information; the Channel Occupancy information may include at least one of:

the Channel Occupancy information may include one or more preset Channel Occupancy information, that is, first Channel Occupancy information;

the Channel Occupancy information may include one or more Channel Occupancy information configured by higher layer signaling, that is, second Channel Occupancy information;

the Channel Occupancy information may include one or more Channel Occupancy information, that is, third Channel Occupancy information, where each Channel Occupancy information has a mapping relationship with a time-frequency resource location of the first physical Channel.

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:

COT duration is the duration of the preset channel occupation;

COT is preset channel occupation time;

the COT starting time is the starting time occupied by a preset channel;

frequency domain resource allocation, namely, preset frequency domain resource allocation;

the available RB set is an available resource block set corresponding to a preset shared channel;

CAPC is the preset channel access priority.

In an embodiment, the Channel Occupancy information may include Channel Occupancy information of one or more higher layer signaling configurations; the Channel Occupancy information of the higher layer signaling configuration may include at least one of:

COT duration, namely duration of channel occupation configured by high-level signaling;

COT is the channel occupation time configured by the high-level signaling;

COT starting time, namely starting time occupied by a channel configured by a high-level signaling;

frequency domain resource allocation, namely frequency domain resource allocation configured by a high-level signaling;

the available RB set is an available resource block set corresponding to a shared channel configured by high-level signaling;

CAPC is the channel access priority configured by the higher layer signaling.

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

the COT duration is the duration of channel occupation having a mapping relation with the time-frequency resource position of the first physical channel;

COT is the channel occupation time with mapping relation with the time frequency resource position of the first physical channel;

the COT starting time is the starting time occupied by the channel with the mapping relation with the time frequency resource position of the first physical channel;

frequency domain resource allocation, namely frequency domain resource allocation with a mapping relation with the time frequency resource position of the first physical channel;

the available RB set is an available resource block set corresponding to a shared channel with a mapping relation with the time-frequency resource position of the first physical channel;

the CAPC is the channel access priority which has a mapping relation with the time-frequency resource position of the first physical channel.

Fig. 9 is a flowchart of another channel occupation information indication method according to an embodiment, and as shown in fig. 9, the method provided in this embodiment is applicable to a second communication terminal and includes

steps

210 and 220.

In step 210, a first physical channel sent by a first communication terminal is received, where the first physical channel is used to indicate shared channel occupancy information, and the shared channel occupancy information includes shared channel occupancy time information.

In step 220, the side link information is transmitted within the shared channel occupation time indicated by the shared channel occupation time information.

In this embodiment, how the second communication terminal receives the first physical channel transmitted by the first communication terminal is not particularly limited. There is no particular limitation on how the second communication terminal transmits the side link information within the shared channel occupying time indicated by the shared channel occupying time information.

In this embodiment, the second communication terminal may not only perform channel occupation itself, but also use a channel preempted by the first communication terminal. The second communication terminal may obtain the shared channel occupation information indicated by the first physical channel by receiving the first physical channel sent by the first communication terminal, and may send the side link information using the channel occupied by the first communication terminal, where the side link information may include the side link channel and/or the side link signal.

In this embodiment, the first physical channel may be understood as a physical side link channel for transmitting shared channel occupancy information. The resource mapping of the first physical channel may be understood as the mapping of the first physical channel onto at least two orthogonal frequency division multiplexing symbols.

In this embodiment, the second communication terminal may determine the channel shared by the first communication terminal according to the shared channel occupation information indicated by the first physical channel by receiving the first physical channel sent by the first communication terminal, and may further send the side link information by using the shared channel within the shared channel occupation time, so that the channel access success rate of the second communication terminal may be improved, and the problem of low channel access success rate of the communication terminal of the side link technology is effectively solved.

In an example embodiment, a second terminal (i.e., a second communication terminal) receives a first physical channel transmitted by a first terminal (i.e., a first communication terminal); the second terminal obtains Channel Occupancy information (namely shared Channel Occupancy information) indicated by the first physical Channel by receiving the first physical Channel; the Channel Occupancy information includes a COT (i.e., shared Channel Occupancy time), and the second terminal transmits sidelink information (i.e., side link information, which may include a side link Channel and/or a sidelink signal) within the COT.

The first physical channel may include the following features: the first physical channel occupies a plurality of resource elements in L orthogonal frequency division multiplexing OFDM symbols in one time slot, and resource elements mapped by a target channel on a 2 nd OFDM symbol are copied to a previous OFDM symbol adjacent to the 2 nd OFDM symbol, wherein L is more than or equal to 2.

Fig. 10 is a flowchart illustrating another method for indicating channel occupancy information according to an embodiment, as shown in fig. 3, the method includes: step 1, receiving a first physical channel; step 2, determining Channel Occupancy information indicated by the first physical Channel; and 3, transmitting the sidelink channel and/or the sidelink signal in the shared COT.

The information for determining the channel allocation indicated by the first physical channel by receiving the first physical channel for the second terminal may include one of:

the channel occasion information may be a set of preset fixed values, and the second terminal may determine the preset channel occasion information by receiving the first physical channel. The information of the channel allocation and the frequency domain position or the time frequency position of the first physical channel may be mapped according to a preset rule. The second terminal may determine the channel allocation information indicated by the first terminal according to the received frequency domain position or time frequency position of the first physical channel and a preset mapping rule.

The information of the channel allocation determined by the second terminal (i.e. the shared channel occupancy information) may include at least one of the following information:

a set of available resource blocks;

allocating frequency domain resources;

COT corresponding to channel occupy (i.e. duration of channel occupancy);

the starting time of COT corresponding to channel occupy;

a channel access priority.

After determining the channel allocation information, the second terminal may allocate a channel within a COT time corresponding to the shared occupied channel, that is, transmit a sidelink channel and/or a sidelink signal within the COT. For example, the COT corresponding to the shared channel copy may be 8ms.

Alternatively, the second terminal may determine the start time of the COT based on the received first physical channel. For example, the second terminal determines the start time of the COT to be: the second terminal receives the next OFDM symbol of the ending OFDM symbol of the first physical channel. Or, the second terminal determines that the start time of the COT is the first OFDM symbol in the slot immediately after the slot where the first physical channel is received by the second terminal.

And the second terminal transmits the sidelink channel and/or the sidelink signal in the determined COT. Optionally, the second terminal determines, based on the frequency domain related information in the shared channel allocation information, a frequency domain resource location occupied by the channel in the COT by the second terminal.

And the second terminal transmits the sidelink channel and/or the sidelink signal in the determined COT. Before the second terminal transmits the sidelink information, the second terminal may further perform one of: performing a channel access procedure; the sensing process (i.e., the sensing process) is not performed.

The second terminal may perform a channel access procedure before transmission of the sidelink channel (or sidelink signal). The channel access procedure may refer to the second terminal sensing the shared channel indicated by the first terminal (or the set of frequency domain resources to which the shared channel belongs), and sensing whether the shared channel (or the set of frequency domain resources to which the shared channel belongs) is available. In the second channel access procedure executed by the second terminal, the duration of sending in the channel access procedure may be at least one of:

the time for the second terminal to perform sending is at least 25us; the second terminal performs sending for 16us.

Alternatively, before the transmission of the sidelink channel (or sidelink signal), the second terminal directly transmits the sidelink channel (or sidelink signal) without performing a sending procedure. That is, the second terminal does not further determine whether the shared channel indicated by the first terminal is available, and the second terminal directly transmits the sidelink channel and/or the sidelink signal within the shared COT.

In an embodiment, the first physical channel occupies at least two orthogonal frequency division multiplexing symbols within one time slot, and the first target symbol includes a second orthogonal frequency division multiplexing symbol of the at least two orthogonal frequency division multiplexing symbols.

In an 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:

the next time slot of the first physical channel a first orthogonal frequency division multiplexing symbol of the time slot; and the last orthogonal frequency division multiplexing symbol in the time slot of the first physical channel.

In this embodiment, the start time of the shared channel occupation time information is located on the first ofdm symbol of the next time slot to the time slot where the first physical channel is located, or the start time of the shared channel occupation time information is located on the last ofdm symbol in the time slot where the first physical channel is located.

In an example embodiment, the second terminal receives the first physical channel sent by the first terminal, and the second terminal determines the COT of the shared channel based on the received first physical channel. The shared channel refers to a channel indicated by or determined by the channel occupancy information indicated by the first terminal. The COT of the shared channel refers to a duration of time during which the second terminal can use the channel shared by the first terminal.

The second terminal may determine the start time of the shared channel COT through a first physical channel transmitted by the first terminal, where the start time includes at least one of:

a start time of a shared channel COT, which is located at a first OFDM symbol of a next slot of the first physical channel;

the start time of the shared channel COT is located in the last OFDM symbol in the slot where the first physical channel is located.

Fig. 11 is a schematic diagram of a second terminal receiving a first physical channel according to an embodiment, where as shown in fig. 11, the second terminal receives the first physical channel transmitted by the first terminal on OFDM symbols numbered 11 and 12 in a time slot n. The start time of the shared channel COT determined by the second terminal is the OFDM symbol numbered 0 on slot n +1. The second terminal may perform transmission of the sidelink channel and/or sidelink signal from the OFDM symbol numbered 0 in the slot n +1, and the duration of the transmission of the sidelink channel and/or channel (i.e. channel occupation) may be the COT marked in fig. 11.

Or, the start time of the shared channel COT determined by the second terminal is the OFDM symbol numbered 13 in the slot n, and the second terminal may transmit the sidelink channel and/or the sidelink signal from the OFDM symbol numbered 13 in the slot n.

In an embodiment, a first physical channel is on a second target symbol, a second communication terminal sends an edge link shared channel to the first communication terminal, and the second communication terminal determines a channel resource of the first physical channel corresponding to the edge link shared channel through a mapping relation between the first physical channel and the edge link shared channel;

the channel resources include one or more of: time domain resources; frequency domain resources.

In an embodiment, the first physical channel overlaps with time-frequency resources of a physical side link feedback channel used for indicating acknowledgement information or negative acknowledgement information, and a cyclic shift of a sequence corresponding to the first physical channel is different from a cyclic shift of a sequence corresponding to the physical side link feedback channel.

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

In one embodiment, a second communication terminal receives a first physical channel, a second physical channel, and a third physical channel on a first time slot;

the time corresponding to the first physical channel comprises a second target symbol, and the second target symbol comprises at least two orthogonal frequency division multiplexing symbols in the first time slot;

the last orthogonal frequency division multiplexing symbol of the third physical channel is separated from the first orthogonal frequency division multiplexing symbol of the first physical channel by zero or one orthogonal frequency division multiplexing symbol.

In this embodiment, the sidelink control information on the second physical channel includes the first part of the shared channel occupancy time information; the first physical channel is used for indicating a second part of information in the shared channel occupation time information.

In an example embodiment, the second terminal determines the shared channel occupancy information indicated by the first terminal in one of the following manners.

Mode 1: the second terminal receives shared channel occupation information indicated by the first terminal through a first physical channel, the first terminal does not include the shared channel occupation information by sending SCI (namely side link control information) on PSCCH (namely second physical channel), the second terminal indicates the shared channel occupation information through the first physical channel, the shared channel occupation information is determined, and a sidelink channel and/or a sidelink signal are/is sent in COT corresponding to shared channel occupation based on the shared channel occupation information.

Mode 2: the second terminal receives SCI transmitted by the first terminal through PSSCH in time slot n, and receives a first physical channel transmitted by the first terminal in time slot n, including:

the SCI comprises a first part of information in COT sharing information;

the first physical channel is used for indicating a second part of information in COT shared information.

In the mode 2, the SCI may include a first part of information in the COT sharing information, and the first part of information may include at least one of:

shared COT (i.e., duration of channel occupancy);

the available RB set corresponding to the shared channel (i.e., the available resource block set corresponding to the shared channel);

CAPC (i.e., channel access priority);

in mode 2, the second part of information in the COT shared information indicated by the first physical channel may include at least one of:

the start time of the shared COT (i.e., the start time of the channel occupancy);

enabling or starting shared channel occupation;

enabling the COT corresponding to the shared channel or opening the COT corresponding to the shared channel.

In one embodiment, the second terminal receives the first physical channel transmitted by the first terminal in time slot n, and receives the SCI transmitted by the first terminal over the PSCCH. The delay for the second terminal to receive the SCI is significantly greater than the delay for the second terminal to receive the first physical channel. The first part of the shared channel occupation information received by the second terminal may include at least one of COT (i.e., duration of channel occupation), CAPC, and the like of shared channel occupation. Where CAPC is used to determine the COT of the shared channel occupancy (i.e., the duration of the channel occupancy). The second part of information in the shared channel occupation information received by the second terminal includes at least one of start time of the shared COT, enable of the shared channel occupation (or start of the shared channel occupation), enable of the COT corresponding to the shared channel (or start of the COT corresponding to the shared channel), and the like. On the first OFDM symbol of the slot n +1, the second terminal cannot determine whether to occupy (share) the corresponding channel through the first part of the shared channel occupancy information included in the SCI. This is because the receive delay of SCI is larger. At this time, the second terminal may determine that the second terminal may occupy (share) the corresponding channel in the time slot n +1 through information indicated by the received second part of information (e.g., indicating that the shared channel is occupied to be turned on). However, at the beginning of a few OFDM symbols of slot n +1, the second terminal cannot know the duration of the channel occupancy of the shared channel, and the second terminal may determine the duration of the channel occupancy of the shared channel after the second terminal is received at the SCI. Thus, the second terminal may continue to occupy the shared channel.

The second terminal can obtain more comprehensive shared channel occupation information and occupy the channel shared by the first terminal earlier and faster through the first part information and the second part information in the shared channel occupation information. Here, the shared channel is a channel determined in the shared channel occupancy information indicated by the first terminal.

In one embodiment, a second communication terminal receives a first physical channel on a first time slot, a second physical channel and a third physical channel on a second time slot;

In this embodiment, the second communication terminal receives a first physical channel in the first time slot, where the first physical channel is used to indicate a first part of information in the shared channel occupation time information;

and the second communication terminal receives the side link control information sent by the first communication terminal through a second physical channel in a second time slot, wherein the side link control information on the second physical channel comprises a second part of information in the shared channel occupation time information.

Mode 1: and the second terminal receives the shared channel occupation information indicated by the first terminal through the first physical channel, and the SCI sent by the first terminal through sending the PSCCH does not include the shared channel occupation information. And the second terminal indicates the shared channel occupation information through the first physical channel, determines the occupation information of the shared channel, and transmits a sidelink channel and/or a sidelink signal in a COT corresponding to the shared channel occupation based on the channel occupation information.

Mode 2: the second terminal receives the first physical channel transmitted by the second terminal in a time slot n (i.e. a first time slot) and receives the SCI transmitted by the first terminal through the psch in a time slot m (i.e. a second time slot), and the method comprises the following steps:

the first physical channel is used for indicating a first part of information in COT (chip on the go) shared information;

the SCI includes a second part of information in the COT sharing information.

In mode 2, the first part of information in the COT shared information indicated by the first physical channel includes at least one of:

the start time of the shared COT;

enabling or starting shared channel occupation;

In mode 2, the SCI includes a second part of information in the COT sharing information, including at least one of:

a shared COT;

the available RB set corresponding to the shared channel;

CAPC。

in an embodiment, the second terminal receives the first physical channel transmitted by the first terminal in the time slot n, and in the first few OFDM symbols of the time slot m, the second terminal has determined the first part of the shared channel occupancy information through the received first physical channel, but the second terminal has not received the second part of the shared channel occupancy information. The first part of information in the shared channel occupation information received by the second terminal includes at least one of start time of the shared COT, enable of the shared channel occupation (or start of the shared channel occupation), enable of the COT corresponding to the shared channel (or start of the COT corresponding to the shared channel), and the like. In the first few symbols of the time slot m, even the whole time slot m, the first terminal cannot know the duration of the channel occupation corresponding to the shared channel because the first terminal cannot obtain the second part of information in the shared channel occupation information. But the first terminal knows the corresponding COT enablement and can currently occupy the shared channel. The first channel may occupy the shared channel before obtaining the second portion of information in the shared channel occupancy information.

It is considered that the time that the second terminal occupies the shared channel cannot exceed the duration of the channel occupation corresponding to the shared channel. Therefore, after a certain delay (e.g. several OFDM symbols or 1-2 slots) after receiving the first part of the information in the shared channel occupancy information, the second terminal receives the second part of the information in the shared channel occupancy information, so as to determine the duration of channel occupancy, and thus, the second terminal can determine the end time of occupying the shared channel.

The second terminal can obtain more comprehensive shared channel occupation information and occupy the channel shared by the first terminal earlier and faster through the first part information and the second part information in the shared channel occupation information. Here, the shared channel is a channel determined by the shared channel occupancy information indicated by the first terminal.

In this embodiment, the second physical channel comprises a physical sidelink control channel; the third physical channel comprises a physical edge link shared channel.

The embodiment of the application also provides a device for indicating the channel occupation information. Fig. 12 is a schematic structural diagram of an apparatus for indicating channel occupancy information according to an embodiment. As shown in fig. 12, the apparatus for indicating channel occupancy information may be configured at a first communication terminal, and includes:

the determining module 110 is configured to determine shared channel occupancy information, where the shared channel occupancy information includes shared channel occupancy time information.

A resource mapping module 120, configured to perform resource mapping of a first physical channel, and copy resource elements mapped by the first channel on a first target symbol to a previous ofdm symbol adjacent to the first target symbol; the first physical channel is used for indicating the shared channel occupation information; the first target symbol is an orthogonal frequency division multiplexing symbol in a time slot of the physical channel.

A sending module 130 configured to send the first physical channel to at least one second communication terminal.

According to the channel occupation information indicating device, after the first communication terminal occupies the channel, the first communication terminal sends the first physical channel to the second communication terminal, and the first physical channel indicates the shared channel occupation information, so that the second communication terminal can share the channel occupied by the first communication terminal, the channel access success rate of the second communication terminal is improved, and the problem that the channel access success rate of the communication terminal in the side link technology is low is effectively solved.

In an embodiment, the apparatus further includes a channel resource determining module, configured to receive a physical edge link shared channel sent by the at least one second communication terminal;

determining channel resources of the first physical channel based on a mapping relation between the first physical channel and the side link shared channel;

In an embodiment, the first physical channel overlaps with a time-frequency resource of a physical side link feedback channel used for indicating acknowledgement information or negative acknowledgement information, and a cyclic shift of a sequence corresponding to the first physical channel is different from a cyclic shift of a sequence corresponding to the physical side link feedback channel.

In an embodiment, the first physical channel indicates hybrid automatic repeat request acknowledgement information and channel occupancy enabling information at the same time.

In an embodiment, when the at least one second communication terminal includes one second communication terminal, the first communication terminal sends the first physical channel to the second communication terminal in a unicast manner.

In this embodiment, the sidelink control information located on the second physical channel includes the first part of the shared channel occupation time information; the first physical channel is used for indicating a second part of information in the shared channel occupation time information.

Wherein the first communication terminal transmits a first physical channel on at least two orthogonal frequency division multiplexing symbols of a first time slot; the first communication terminal transmits the second physical channel starting from the first orthogonal frequency division multiplexing symbol of the second slot or from the second orthogonal frequency division multiplexing symbol of the second slot.

The first physical channel is used for indicating a first part of information in the shared channel occupation time information; the side link control information on the second physical channel includes a second portion of information in the shared channel occupancy time information.

the third time slot is earlier than the second time slot.

The channel occupancy information indication apparatus proposed in this embodiment is the same as the channel occupancy information indication method proposed in the above embodiment, and the technical details that are not described in detail in this embodiment can be referred to any of the above embodiments, and this embodiment has the same beneficial effects as the channel occupancy information indication method.

An embodiment of the present application further provides another device for indicating channel occupancy information, and fig. 13 is a schematic structural diagram of the another device for indicating channel occupancy information provided in the embodiment. As shown in fig. 13, the apparatus for indicating channel occupancy information may be configured in a second communication terminal, and includes:

the receiving module 210 is configured to receive a first physical channel sent by a first communication terminal, where the first physical channel is used to indicate shared channel occupancy information, and the shared channel occupancy information includes shared channel occupancy time information.

The using module 220 is configured to send the side link information within the shared channel occupation time indicated by the shared channel occupation time information.

According to the channel occupation information indicating device, the second communication terminal receives the first physical channel sent by the first communication terminal, the channel shared by the first communication terminal can be determined according to the shared channel occupation information indicated by the first physical channel, and then the shared channel can be used for sending the side link information within the shared channel occupation time, so that the channel access success rate of the second communication terminal can be improved, and the problem that the channel access success rate of the communication terminal of the side link technology is low is effectively solved.

a first orthogonal frequency division multiplexing symbol of a time slot next to the time slot of the first physical channel; and the last orthogonal frequency division multiplexing symbol in the time slot of the first physical channel.

In an embodiment, when a first physical channel is on a second target symbol and a second communication terminal sends an edge link shared channel to a first communication terminal, the second communication terminal determines channel resources of the first physical channel corresponding to the edge link shared channel through a mapping relation between the first physical channel and the edge link shared channel;

The sequence cyclic shift of the sequence corresponding to the first physical channel is mapped with at least one of the following information:

The side link control information positioned on the second physical channel comprises first part information in shared channel occupation time information; the first physical channel is used for indicating a second part of information in the shared channel occupation time information.

The second communication terminal receives a first physical channel in the first time slot, wherein the first physical channel is used for indicating first part of information in shared channel occupation time information; and the second communication terminal receives the side link control information sent by the first communication terminal through the second physical channel in the second time slot, wherein the side link control information on the second physical channel comprises a second part of information in the shared channel occupation time information.

Fig. 14 is a schematic hardware structure diagram of a first communication terminal provided in an embodiment, as shown in fig. 14, the first communication terminal provided in the present application includes a memory 420, a processor 410, and a computer program stored in the memory and capable of running on the processor, and when the processor 410 executes the program, the above-mentioned channel occupancy information indication method is implemented.

The first communication terminal may further include a memory 420; the processor 410 in the first communication terminal may be one or more, and one processor 410 is taken as an example in fig. 14; 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 the present application.

The first communication terminal further includes: a communication device 430, an input device 440, and an output device 450.

The processor 410, the memory 420, the communication device 430, the input device 440 and the output device 450 in the first communication terminal may be connected by a bus or other means, and the connection by the bus is exemplified in fig. 14.

The input device 440 may be used to receive input numeric or character information and generate key signal inputs related to user settings and function control of the terminal device. The output device 450 may include a display device such as a display screen.

The communication device 430 may include a receiver and a transmitter. The communication device 430 is configured to perform information transceiving communication according to the control of the processor 410.

The memory 420 may be configured to store a software program, a computer executable program, and modules, such as program instructions/modules (e.g., the determining module 110, the resource mapping module 120, and the sending module 130 in the channel occupancy information indication apparatus) corresponding to the channel occupancy information indication method according to the embodiment of the present application. The memory 420 may include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required for at least one function; the storage data area may store data created according to the use of the first communication terminal, and the like. Further, the memory 420 may include high speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other non-volatile solid state storage device. In some examples, the memory 420 may further include memory located remotely from the processor 510, which may be connected to the first communication terminal through a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.

Fig. 15 is a schematic hardware structure diagram of a second communication terminal according to an embodiment, as shown in fig. 15, the second communication terminal includes a memory 520, a processor 510, and a computer program stored in the memory and capable of running on the processor, and when the processor 510 executes the program, the above-mentioned channel occupancy information indication method is implemented.

The first communication terminal may further include a memory 520; the processor 510 in the second communication terminal may be one or more, and fig. 15 illustrates one 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 the present application.

The second communication terminal further includes: a communication device 530, an input device 540, and an output device 550.

The processor 510, the memory 520, the communication device 530, the input device 540 and the output device 550 in the second communication terminal may be connected by a bus or other means, and the connection by the bus is exemplified in fig. 15.

The input device 540 may be used to receive input numeric or character information and generate key signal inputs related to user settings and function control of the terminal device. The output means 550 may comprise a display device such as a display screen.

The communication device 530 may include a receiver and a transmitter. The communication device 530 is configured to perform information transceiving communication according to the control of the processor 510.

The memory 520, which is a computer-readable storage medium, may be configured to store software programs, computer-executable programs, and modules, such as program instructions/modules (e.g., the receiving module 210 and the using module 220 in the channel occupancy information indication apparatus) corresponding to the channel occupancy information indication method according to the embodiment of the present application. The memory 520 may include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required for at least one function; the storage data area may store data created according to the use of the second communication terminal, and the like. Further, the memory 520 may include high speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other non-volatile solid state storage device. In some examples, the memory 520 may further include memory located remotely from the processor 510, which may be connected to a second communication terminal through a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.

The embodiment of the present application further provides a storage medium, where a computer program is stored, and when the computer program is executed by a processor, the transmission method in any one of the embodiments of the present application is implemented.

Optionally, the transmission method is applied to a terminal device, and includes: determining information to be transmitted, wherein the information to be transmitted indicates a management entity to select resources for the terminal equipment; and transmitting the information to be transmitted to the management entity.

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

The computer storage media of the embodiments of the present application may take any combination of one or more computer-readable media. The computer readable medium may be a computer readable signal medium or a computer readable storage medium. The computer-readable storage medium may be, for example, but is not limited to: an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination thereof. More specific examples (a non-exhaustive list) of the computer readable storage medium would include the following: an electrical connection having one or more wires, a portable computer diskette, a hard disk, a Random Access Memory (RAM), a Read Only Memory (ROM), an Erasable Programmable Read Only Memory (EPROM), a flash Memory, an optical fiber, a portable CD-ROM, an optical storage device, a magnetic storage device, or any suitable combination of the foregoing. A computer readable storage medium may be any tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device.

A computer readable signal medium may include a propagated data signal with computer readable program code embodied therein, for example, in baseband or as part of a carrier wave. Such a propagated data signal may take a variety of forms, including, but not limited to: an electromagnetic signal, an optical signal, or any suitable combination of the foregoing. A computer readable signal medium may also be any computer readable medium that is not a computer readable storage medium and that can communicate, propagate, or transport a program for use by or in connection with an instruction execution system, apparatus, or device.

Program code embodied on a computer readable medium may be transmitted using any appropriate medium, including but not limited to: wireless, wire, fiber optic cable, radio Frequency (RF), etc., or any suitable combination of the foregoing.

Computer program code for carrying out operations for aspects of the present application may be written in any combination of one or more programming languages, including an object oriented programming language such as Java, smalltalk, C + +, or a conventional procedural programming language such as the "C" programming language or similar programming languages. The program code may execute entirely on the user's computer, partly on the user's computer, as a stand-alone software package, partly on the user's computer and partly on a remote computer or entirely on the remote computer or server. In the case of a remote computer, the remote computer may be connected to the user's computer through any type of network, including a Local Area Network (LAN) or a Wide Area Network (WAN), or the connection may be made to an external computer (for example, through the Internet using an Internet service provider).

The above description is only exemplary embodiments of the present application, and is not intended to limit the scope of the present application.

It will be clear to a person skilled in the art that the term user terminal covers any suitable type of wireless user equipment, such as a mobile phone, a portable data processing device, a portable web browser or a car mounted mobile station.

In general, the various embodiments of the application may be implemented in hardware or special purpose circuits, software, logic or any combination thereof. For example, some aspects may be implemented in hardware, while other aspects may be implemented in firmware or software which may be executed by a controller, microprocessor or other computing device, although the application is not limited thereto.

Embodiments of the application may be implemented by a data processor of a mobile device executing computer program instructions, for example in a processor entity, or by hardware, or by a combination of software and hardware. The computer program instructions may be assembly instructions, instruction Set Architecture (ISA) instructions, machine-related instructions, microcode, firmware instructions, state setting data, or source code or object code written in any combination of one or more programming languages.

Any logic flow block diagrams in the figures 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 the memory. The 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 versatile disks (DVD) or Compact Disks (CD), etc. computer-readable media may include non-transitory storage media.

The foregoing has provided by way of exemplary and non-limiting examples a detailed description of exemplary embodiments of the present application. Various modifications and adaptations to the foregoing embodiments may become apparent to those skilled in the relevant arts in view of the drawings and the following claims without departing from the scope of the invention. Accordingly, the proper scope of the application is to be determined according to the claims.

Claims

1. A channel occupation information indication method is applied to a first communication terminal, and the method comprises the following steps:

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

3. The method of claim 1, wherein the first physical channel comprises a physical side link feedback channel.

4. The method of claim 1, further comprising:

receiving a physical side link shared channel sent by the at least one second communication terminal;

the channel resources include one or more of: a time domain resource; frequency domain resources.

5. The method of claim 1, wherein the first physical channel overlaps with time-frequency resources of a physical side link feedback channel used for indicating acknowledgement information or negative acknowledgement information, and wherein a cyclic shift of a sequence corresponding to the first physical channel is different from a cyclic shift of a sequence corresponding to the physical side link feedback channel.

6. The method of claim 1, wherein the first physical channel overlaps with time-frequency resources of a physical side link feedback channel used for indicating collision information, and wherein a cyclic shift of a sequence corresponding to the first physical channel is different from a cyclic shift of a sequence corresponding to the physical side link feedback channel.

7. The method of claim 1, wherein the first physical channel indicates hybrid automatic repeat request acknowledgement information and channel occupancy enabling information simultaneously.

8. The method of claim 7, wherein the sequence cyclic shift of the sequence corresponding to the first physical channel is mapped with at least one of the following information:

9. The method according to claim 1, characterized in that the first communication terminal and the at least one second communication terminal belong to the same user group.

10. The method of claim 1, wherein when the at least one second communication terminal comprises a second communication terminal, the first communication terminal sends the first physical channel to the second communication terminal in a unicast manner.

11. The method of claim 1, wherein the first physical channel is used for indicating cooperation information, and wherein the cooperation information comprises a shared channel occupation time.

12. The method of claim 1, wherein the first communication terminal transmits the first physical channel, the second physical channel, and the third physical channel on the same time slot;

13. The method of claim 12,

the side link control information positioned on the second physical channel comprises first part information in the shared channel occupation time information;

the first physical channel is used for indicating a second part of information in the shared channel occupation time information.

14. The method of claim 1, wherein the first communication terminal transmits a first physical channel on a first time slot, and wherein the first communication terminal transmits a second physical channel and a third physical channel on a second time slot;

15. The method of claim 14,

the first communication terminal transmits a first physical channel on at least two orthogonal frequency division multiplexing symbols of the first time slot;

the first communication terminal transmits a second physical channel starting from a first orthogonal frequency division multiplexing symbol of the second slot or from a second orthogonal frequency division multiplexing symbol of the second slot.

16. The method of claim 14,

the first physical channel is used for indicating a first part of information in shared channel occupation time information;

and the side link control information on the second physical channel comprises a second part of information in the shared channel occupation time information.

17. The method according to any of claims 12-16, wherein the second physical channel comprises a physical edge link control channel; the third physical channel comprises a physical edge link shared channel.

18. The method of claim 1, wherein the shared channel occupancy information comprises one or more of:

19. The method of claim 1, wherein the at least one communication terminal comprises a second communication terminal, and wherein the first communication terminal is configured to transmit the first physical channel to the second communication terminal in the first time slot according to one or more of the following conditions:

the third time slot is earlier than the second time slot.

20. The method of claim 1, wherein the shared channel occupancy information comprises one or more preset first channel occupancy information.

21. The method of claim 1, wherein the shared channel occupancy information comprises second channel occupancy information configured by one or more higher layer signaling.

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

23. A channel occupation information indication method is applied to a second communication terminal, and the method comprises the following steps:

24. The method of claim 23, wherein the first physical channel occupies at least two orthogonal frequency division multiplexing symbols in one time slot, and wherein the first target symbol comprises a second orthogonal frequency division multiplexing symbol of the at least two orthogonal frequency division multiplexing symbols.

25. The method of claim 23, 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:

26. The method according to claim 23, wherein the first physical channel is on a second target symbol, and when the second communication terminal sends an edge link shared channel to the first communication terminal, the second communication terminal determines, through a mapping relationship between the first physical channel and the edge link shared channel, a channel resource of the first physical channel corresponding to the edge link shared channel;

27. The method of claim 23, wherein the first physical channel overlaps with time-frequency resources of a physical side link feedback channel used for indicating acknowledgement information or negative acknowledgement information, and wherein a cyclic shift of a sequence corresponding to the first physical channel is different from a cyclic shift of a sequence corresponding to the physical side link feedback channel.

28. The method of claim 23, wherein the first physical channel overlaps with time-frequency resources of a physical side link feedback channel used for indicating collision information, and wherein a cyclic shift of a sequence corresponding to the first physical channel is different from a cyclic shift of a sequence corresponding to the physical side link feedback channel.

29. The method of claim 23, wherein the first physical channel indicates hybrid automatic repeat request acknowledgement information and channel occupancy enabling information simultaneously.

30. The method of claim 29, wherein the sequence cyclic shift of the sequence corresponding to the first physical channel is mapped with at least one of the following information:

negative acknowledgement and channel occupancy enable; negative acknowledgement and channel occupancy are not enabled; positive acknowledgement and channel occupancy enable; affirmative acknowledgements and channel occupancy are not enabled.

31. The method of claim 23, wherein the second communication terminal receives the first physical channel, the second physical channel, and the third physical channel on the first time slot;

32. The method of claim 31,

33. The method of claim 23, wherein the second communication terminal receives the first physical channel in a first time slot, and receives the second physical channel and the third physical channel in a second time slot;

34. The method of claim 33,

the second communication terminal receives a first physical channel in the first time slot, wherein the first physical channel is used for indicating a first part of information in shared channel occupation time information;

and the second communication terminal receives the side link control information sent by the first communication terminal through the second physical channel in the second time slot, wherein the side link control information on the second physical channel comprises a second part of information in the shared channel occupation time information.

35. The method according to any of claims 31-34, wherein the second physical channel comprises a physical edge link control channel; the third physical channel comprises a physical side link shared channel.

36. The method of claim 23, wherein the shared channel occupancy information comprises one or more preset first channel occupancy information.

37. The method of claim 23, wherein the shared channel occupancy information comprises second channel occupancy information configured by one or more higher layer signaling.

38. The method of claim 23, wherein the shared channel occupancy information comprises one or more third channel occupancy information, and each third channel occupancy information has a mapping relationship with a time-frequency resource location of the first physical channel.

39. A first communication terminal, comprising: memory, processor and computer program stored on the memory and executable on the processor, which when executed by the processor implements the method of any one of claims 1-24.

40. A second communication terminal, comprising: memory, processor and computer program stored on the memory and executable on the processor, which when executed performs the method of any one of claims 25-29.

41. A storage medium on which a computer program is stored, which program, when being executed by a processor, carries out the method according to any one of claims 1-38.