CN115866775A

CN115866775A - Information transmission method, terminal and storage medium

Info

Publication number: CN115866775A
Application number: CN202210406779.1A
Authority: CN
Inventors: 贺海港; 卢有雄; 胡宇洲; 苗婷
Original assignee: ZTE Corp
Current assignee: ZTE Corp
Priority date: 2022-04-18
Filing date: 2022-04-18
Publication date: 2023-03-28
Also published as: WO2023202397A1

Abstract

The application provides an information transmission method, a terminal and a storage medium. The method comprises the following steps: sending channel occupation time COT sharing indication information; COT request information is received.

Description

Information transmission method, terminal and storage medium

Technical Field

The present application relates to the field of communications technologies, and for example, to an information transmission method, a terminal, and a storage medium.

Background

In a SideLink (SideLink) communication system, when services are required to be transmitted between User Equipments (UEs), the services between the UEs do not pass through a network side, that is, do not pass through the forwarding of a cellular link between the UEs and a base station, but are directly transmitted to a target UE by a data source UE through the SideLink.

In unlicensed spectrum, a Listen Before Talk (LBT) successful channel can be transmitted. LBT means that a communication node performs a channel access procedure (whether a channel is monitored to be idle) before information is transmitted, and the communication node can perform information transmission only if the channel is monitored to be idle. For a communication node with successful LBT, a Channel with a certain length of Time may be Occupied, which corresponds to Channel Occupied Time (COT). In COT sharing for cellular networks, COT sharing is performed between one base station and its served UEs. Because the base station supports the function of resource scheduling, the base station allocates each time-frequency resource in the COT sharing to different UE, so that the problem of resource conflict of a plurality of communication nodes caused by the fact that the COT shared by one communication node is occupied by a plurality of communication nodes is solved.

In the SideLink communication, there is usually no central scheduling node that allocates different UEs with different COTs sharing different time-frequency resources. Therefore, there is a conflict of COT sharing in the SideLink communication of the unlicensed spectrum.

Disclosure of Invention

The application provides an information transmission method, a terminal and a storage medium.

The embodiment of the application provides an information transmission method, which is applied to a first terminal and comprises the following steps:

sending COT sharing indication information;

COT request information is received.

The embodiment of the present application further provides an information transmission method, which is applied to a second terminal, and includes:

receiving COT sharing indication information;

sending COT request information;

COT sharing confirmation information is received.

The embodiment of the present application further provides an information transmission method, which is applied to a third terminal, and includes:

receiving COT request information;

and sending COT sharing confirmation information.

An embodiment of the present application further provides a user 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 information transmission method when executing the program.

An embodiment of the present application further provides a computer-readable storage medium, on which a computer program is stored, and when the computer program is executed by a processor, the information transmission method 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 an information transmission method according to an embodiment;

FIG. 2 is a flow chart of another method for information transmission according to an embodiment;

fig. 3 is a flowchart of another information transmission method according to an embodiment;

fig. 4 is a schematic diagram illustrating an implementation of an information transmission method according to an embodiment;

fig. 5 is a schematic diagram illustrating an implementation of a first terminal-side information transmission method according to an embodiment;

fig. 6 is a schematic diagram illustrating an implementation of a second terminal-side information transmission method according to an embodiment;

fig. 7 is a schematic diagram illustrating an implementation of another information transmission method according to an embodiment;

fig. 8 is a schematic diagram illustrating an implementation of another first terminal-side information transmission method according to an embodiment;

fig. 9 is a schematic diagram illustrating an implementation of another second terminal-side information transmission method according to an embodiment;

fig. 10 is a schematic diagram illustrating an implementation of a new transmission method at a third terminal side according to an embodiment;

fig. 11 is a schematic diagram illustrating a mapping relationship between each time-frequency resource unit in a COT time-frequency resource area and a PSFCH subgroup according to an embodiment;

fig. 12 is a schematic diagram illustrating an implementation of a time-frequency resource unit within a COT time range according to an embodiment;

fig. 13 is a schematic diagram illustrating an implementation of a time-frequency resource unit in another COT time range according to an embodiment;

fig. 14 is a schematic diagram illustrating an implementation of a PSFCH subgroup according to an embodiment;

FIG. 15 is a diagram illustrating an implementation of another PSFCH subgroup, according to an embodiment;

FIG. 16 is a diagram illustrating an implementation of another PSFCH subgroup according to an embodiment;

fig. 17 is a schematic diagram illustrating implementation of a time-frequency resource unit within a COT time range according to an embodiment;

fig. 18 is a schematic diagram illustrating an implementation of a time-frequency resource unit within a COT time range according to an embodiment;

FIG. 19 is a diagram illustrating an implementation of another PSFCH subgroup, according to an embodiment;

FIG. 20 is a diagram illustrating an implementation of another PSFCH subgroup according to an embodiment;

fig. 21 is a schematic structural diagram of an information transmission apparatus according to an embodiment;

fig. 22 is a schematic structural diagram of an information transmission apparatus according to an embodiment;

fig. 23 is a schematic structural diagram of an information transmission apparatus according to an embodiment;

fig. 24 is a schematic hardware structure diagram of a user 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 side link (SideLink) communication system, when services need to be transmitted between User Equipments (UEs), the services between the UEs do not pass through a network side, that is, do not pass through the forwarding of a cellular link between the UE and a base station, but are directly transmitted to a target UE by a data source UE through the SideLink. Typical applications of edge-link communication include Device-to-Device (D2D) communication and Vehicle networking (V2X) communication. The Vehicle networking (V2X) communication includes Vehicle-to-Vehicle (V2V) communication, vehicle-to-human (V2P) communication, and Vehicle-to-Infrastructure (V2I) communication. For the near field communication users capable of applying the SideLink communication, the SideLink 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 delay and saves the network operation cost to a great extent.

Currently, the design of the SideLink only considers an Intelligent Transport System (ITS) spectrum and an authorized spectrum allocated to a network operator, and does not consider the design of an unauthorized spectrum. In the existing silk link, a timeslot may contain some silk link channels, and the silk link channels in the timeslot may include a Physical side link Control Channel (PSCCH), a Physical side link Shared Channel (PSCCH), and a Physical side link Feedback Channel (PSFCH). In addition, one slot may also include an Orthogonal frequency-division multiplexing (OFDM) symbol in which no SideLink channel is transmitted throughout the symbol.

In the unlicensed spectrum, the channels that LBT succeeds can be transmitted. The LBT means that a communication node needs to compete for resources, and only if the contention of the time-frequency resource is successful, the communication node can transmit information on the time-frequency resource. More specifically, in the LBT mechanism, a communication node performs a channel access procedure (whether a channel is monitored to be idle) before information is transmitted, and the communication node can perform information transmission only if the channel is monitored to be idle.

For a communication node with successful LBT, a channel of a certain length of time may be occupied, which corresponds to 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 which succeeds in LBT, or the communication node which succeeds in LBT shares the COT and shares the resource 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, in the current protocol, only COT sharing of the cellular network is supported, and COT sharing of the sidlink is not supported. In COT sharing in a cellular network, COT sharing is performed between one base station and its served UEs. Because the base station supports the function of resource scheduling, the problem of resource conflict of a plurality of communication nodes caused by the fact that a COT shared by one communication node is occupied by a plurality of communication nodes does not exist.

However, in the unlicensed spectrum SideLink communication, no central scheduling node generally allocates different COT shared time-frequency resources to different UEs. Therefore, the resource conflict problem of COT sharing exists, namely that the SideLink COT sharing is not supported at present.

The application provides a technical solution for COT sharing, which is used for solving the problem that the prior SideLink communication does not support COT sharing, and particularly can solve the problem of resource conflict in the SideLink COT sharing.

To solve the above technical problem, fig. 1 is a flowchart of an information transmission method according to an embodiment, and as shown in fig. 1, the method provided by this embodiment is applicable to a first terminal and includes step 110 and step 120.

In step 110, COT sharing indication information is transmitted.

In step 120, COT request information is received.

In this embodiment, the COT sharing indication information may be understood as information indicating COT sharing resources. The COT request information may also be referred to as COT sharing request information, which may be understood as information for requesting a COT sharing resource. The first terminal sends COT sharing indication information to the second terminal, the second terminal sends COT request information to the first terminal after receiving the COT sharing indication information, and the first terminal receives the COT request information.

In this embodiment, the first terminal may notify a terminal (e.g., a second terminal) receiving the COT sharing indication information by sending the COT sharing indication information, which resources the first terminal shares; the first terminal may also know the resources requested by the terminal (e.g., the second terminal) that transmitted the COT request message by receiving the COT request message. Therefore, the problem that COT sharing is not supported in the existing SideLink communication is solved.

In an embodiment, a resource index corresponding to a channel that transmits the COT request information satisfies one or more of the following:

a resource index corresponding to a channel for sending COT request information has a mapping relation with a time frequency resource for sending COT sharing indication information;

a resource index corresponding to a channel for sending COT request information has a mapping relation with a time frequency resource set shared in a COT time range;

and a mapping relation exists between the resource index corresponding to the channel for sending the COT request information and the subset in the time frequency resource set shared in the COT time range.

In this embodiment, the time frequency resource where the COT sharing indication information is sent may be understood as a time frequency resource used by the first terminal to send the COT sharing indication information, or the time frequency resource used by the first terminal to send the COT sharing indication information belongs to a subset of the time frequency resource where the COT sharing indication information is sent. The resource index corresponding to the channel for sending the COT request information and the time frequency resource for sending the COT sharing indication information can be mapped according to a certain rule to form a mapping relation; here, mapping between the resource index corresponding to the channel for sending the COT request information and the time frequency resource for sending the COT sharing indication information is not limited.

The time frequency resource set shared in the COT time range may be understood as a time frequency resource set shared in the COT time range determined by the second terminal according to the received COT sharing indication information, and how to determine the time frequency resource set shared in the COT time range is not specifically limited here. The first terminal or the third terminal may determine the time frequency resource unit requested by the COT sharing request information of the first physical edge link channel according to a mapping relationship between each time frequency resource unit in the time frequency resource set shared within the COT time range and the first physical edge link channel.

The resource index corresponding to the channel sending the COT request information and the time-frequency resource set shared in the COT time range may be mapped according to a certain rule, or the resource index corresponding to the channel sending the COT request information and a subset of the time-frequency resource set shared in the COT time range may also be mapped according to a certain rule. Similarly, the mapping between the resource index corresponding to the channel for sending the COT request information and the time-frequency resource set shared in the COT time range, and the mapping between the resource index corresponding to the channel for sending the COT request information and the subset of the time-frequency resource set shared in the COT time range are not limited here.

In one embodiment, the COT request message is transmitted over a first physical sidelink channel.

In this embodiment, the first physical edge link channel may be understood as a channel for transmitting COT request information, and the first physical edge link channel is not limited herein. The transmission of the COT request message through the first physical sidelink channel may also be understood as the request of the COT request message through the first physical sidelink channel.

In an embodiment, the first physical edge link channel satisfies one or more of:

the first physical side link channel is a PSFCH channel;

the first physical side link channel occupies a plurality of resource elements in 2 OFDM symbols in one time slot, wherein the resource elements mapped by the first physical side link channel on the 1 st OFDM symbol are obtained by copying the resource elements mapped by the first physical side link channel on the 2 nd OFDM symbol.

In an embodiment, a mapping relationship exists between the first physical sidelink channel and a time frequency resource where the COT sharing indication information is sent.

In this embodiment, a mapping relationship exists between a first physical edge link channel used for transmitting COT sharing request information and a time-frequency resource where the COT sharing indication information is sent, and resource indexes of the first physical edge link channel used by different terminals for sending the COT sharing request information are different, so that the first terminal can identify which terminals send the COT sharing request information according to the mapping relationship.

In an embodiment, a mapping relationship exists between a first physical edge link channel and a time frequency resource set shared in a COT time range; or,

the first physical side link channel has a mapping relation with a subset of the time frequency resource set shared in the COT time range.

In this embodiment, the time-frequency resource set shared within the COT time range may be understood as that each resource in the time-frequency resource set within the COT time range is a time-frequency resource to be requested, and the subset in the time-frequency resource set shared within the COT time range may be understood as that each resource in the subset of the time-frequency resources within the COT time range is a time-frequency resource to be requested. The first terminal may determine, according to a mapping relationship between the first physical edge link channel and a time-frequency resource set shared within the COT time range (or a subset of the time-frequency resource set shared within the COT time range), a time-frequency resource requested by a terminal (e.g., a second terminal) that sends the COT sharing request information.

In an embodiment, the time-frequency resource set shared in the COT time range includes a plurality of time-frequency resource units, and each time-frequency resource unit is mapped to the first physical side link channel according to a set manner.

In this embodiment, the setting manner may be understood as a preset mapping manner, which is not limited herein, for example, the setting manner of mapping each time-frequency resource unit to the corresponding first physical edge link channel may be determined based on a first setting formula.

In an embodiment, a setting mode of mapping each time-frequency resource unit to a corresponding first physical side link channel is determined based on a first setting formula;

the first setting formula for determining at least one resource number of the corresponding first physical edge link channel includes a timeslot number and a number of frequency domain resources corresponding to a resource corresponding to the determined resource number.

In this embodiment, the first setting formula may be understood as a preset formula for determining at least one resource number of the first physical edge link channel corresponding to each time-frequency resource unit. The first setting formula may include a slot number corresponding to a resource corresponding to the determined resource number and a number of the frequency domain resource.

In an embodiment, the method further comprises:

determining the resource number of a first physical side link channel mapped by at least one time-frequency resource unit in a group of physical side link channels;

the second setting formula for determining the resource number of a first physical side link channel mapped by at least one time-frequency resource unit in a set of physical side link channels includes: a source identification of the first terminal and an identification of the second terminal.

In this embodiment, the set of physical edge link channels includes at least one physical edge link channel, including the first physical edge link channel. The second setting formula may be understood as a formula which is preset to determine a resource number of a first physical side link channel mapped by at least one time-frequency resource unit in a set of physical side link channels.

A first physical side link channel mapped by at least one time-frequency resource unit can be mapped between the resource number in a group of physical side link channels and the source (source) identification (Identity, ID) of a first terminal according to a certain rule, and a first physical side link channel mapped by at least one time-frequency resource unit can be mapped between the resource number in a group of physical side link channels and the identification number of a second terminal according to a certain rule; on the basis, the second setting formula for determining the resource number of one first physical side link channel mapped by at least one time-frequency resource unit in a group of physical side link channels may include the source identifier of the first terminal and the identifier of the second terminal.

In an embodiment, the method further comprises:

and sending COT sharing confirmation information.

In this embodiment, the COT sharing confirmation information may be understood as information for confirming that the COT shares the time frequency resource, and the terminal (for example, the second terminal) that sends the COT sharing request information may be notified by the COT sharing confirmation information, and the first terminal may share the COT sharing time frequency resource requested by the first terminal to the terminal that sends the COT sharing request information. In this embodiment, the COT sharing confirmation information is sent to one of the terminals sending the COT sharing request information, where the resource conflict occurs, so that the problem of resource conflict caused by multiple terminals requesting the same time-frequency resource can be avoided.

In one embodiment, the COT shared acknowledgment is transmitted over the second physical side-link channel.

In this embodiment, the second physical side link channel may be understood as a channel for transmitting the COT shared acknowledgement information, which is sent to the second terminal, and the second physical side link channel is not limited herein. The transmission of the COT sharing confirmation information through the second physical side link channel may also be understood as the first terminal sending the COT sharing confirmation information through the second physical side link channel.

In an embodiment, the second physical sidelink channel satisfies one or more of:

the second physical side link channel is a PSFCH channel;

the second physical side link channel occupies a plurality of resource elements in 2 OFDM symbols in one time slot, wherein the resource elements mapped by the first physical side link channel on the 1 st OFDM symbol are obtained by copying the resource elements mapped by the first physical side link channel on the 2 nd OFDM symbol.

In an embodiment, the second physical side link channel has a mapping relationship with a time frequency resource where the COT sharing indication information is sent.

In an embodiment, the second physical side link channel has a mapping relationship with a time frequency resource set shared in a COT time range; or,

and the second physical side link channel has a mapping relation with the subset in the time frequency resource set shared in the COT time range.

In an embodiment, the time-frequency resource set shared in the COT time range includes a plurality of time-frequency resource units, and each time-frequency resource unit is mapped to the second physical side link channel according to a set manner.

In this embodiment, the setting manner in which each time-frequency resource unit is mapped to the corresponding second physical side link channel may also be determined based on the first setting formula. The first setting formula may include a slot number corresponding to a resource corresponding to the determined resource number and a number of the frequency domain resource.

In an embodiment, the method further comprises:

determining the resource number of a second physical side link channel mapped by at least one time-frequency resource unit in a group of physical side link channels;

the third setting formula for determining the resource number of the second physical side link channel mapped by the at least one time-frequency resource unit in the set of physical side link channels includes: a source identification of the first terminal and an identification of the second terminal.

In this embodiment, the third setting formula may be understood as a preset formula for determining a resource number of a second physical edge link channel mapped by at least one time-frequency resource unit in a set of physical edge link channels.

A second physical side link channel mapped by at least one time-frequency resource unit can be mapped between the resource number in a group of physical side link channels and the source identification of the first terminal according to a certain rule, and a second physical side link channel mapped by at least one time-frequency resource unit can also be mapped between the resource number in a group of physical side link channels and the identification number of the second terminal according to a certain rule; on the basis, the third setting formula for determining the resource number of a second physical side link channel mapped by at least one time-frequency resource unit in a set of physical side link channels may include the source identifier of the first terminal and the identifier of the second terminal.

In one embodiment, the COT shared acknowledgement Information is contained in Sidelink Control Information (SCI).

In this embodiment, the fact that the COT sharing confirmation information is included in the SCI may be understood that the first terminal sends the SCI, where the SCI includes the COT sharing confirmation information; it is also understood that the first terminal transmits the COT sharing confirmation information through the SCI.

In an embodiment, the COT sharing confirmation information includes a terminal identification number of the at least one terminal, and the terminal identification number is used for confirmation of the COT sharing confirmation information.

In this embodiment, the COT sharing confirmation information may include a terminal identification number of at least one terminal, where when sending the COT sharing confirmation information, the COT sharing confirmation information may be sent to a terminal corresponding to the terminal identification number, so that the corresponding terminal may perform, based on the COT sharing confirmation information, confirmation whether the COT sharing confirmation information is transmitted to itself.

Fig. 2 is a flowchart of another information transmission method according to an embodiment, and as shown in fig. 2, the method provided in this embodiment is applicable to a second terminal and includes

steps

210, 220, and 230.

In step 210, COT sharing indication information is received.

In step 220, COT request information is transmitted.

In step 230, a COT sharing confirmation message is received.

In this embodiment, after receiving the COT sharing indication information sent by the first terminal, the second terminal sends a COT request message to the first terminal or the third terminal; after receiving the COT request message, the first terminal or the third terminal sends COT sharing confirmation message, and the second terminal receives the COT sharing confirmation message.

In this embodiment, the second terminal may know which time-frequency resources the first terminal shares by receiving the COT sharing indication information; then, the terminal (such as the first terminal or the third terminal) receiving the COT request information is informed of which time-frequency resources to be requested by sending the COT request information; finally, it can be determined that the requested time-frequency resource can be used at this time by receiving the COT sharing confirmation information. Therefore, the situation that the current SideLink communication does not support COT sharing can be solved, and the problem of resource conflict caused by the fact that a plurality of terminals simultaneously request the same time-frequency resource in COT sharing can be solved through the COT sharing confirmation information.

the first physical side link channel is a PSFCH channel;

In an embodiment, a mapping relationship exists between a first physical side link channel and a time frequency resource set shared in a COT time range; or,

In an embodiment, the method further comprises:

and determining a time frequency resource set shared in the COT time range according to the COT sharing indication information, wherein the time frequency resource set comprises a plurality of time frequency resource units, and each time frequency resource unit is mapped to the first physical side link channel according to a set mode.

the first setting formula for determining at least one resource number of the corresponding first physical edge link channel includes a timeslot number and a frequency domain resource number corresponding to a resource corresponding to the determined resource number.

In one embodiment, the method further comprises:

In an embodiment, the COT shared acknowledgement information is transmitted over the second physical side link channel or over a third physical side link channel of the third terminal.

In this embodiment, the third physical side link channel may be understood as a channel used for transmission of the COT shared acknowledgement information sent by the third terminal.

In an embodiment, the third physical side-link channel satisfies one or more of:

the third physical side link channel is a PSFCH channel;

and the third physical side link channel occupies a plurality of resource elements in 2 OFDM symbols in one time slot, wherein the resource elements mapped by the first physical side link channel on the 1 st OFDM symbol are obtained by copying the resource elements mapped by the first physical side link channel on the 2 nd OFDM symbol.

In an embodiment, the setting mode of mapping each time-frequency resource unit to the corresponding second physical side link channel is determined based on a first setting formula;

the first setting formula for determining at least one resource number of the corresponding second physical side link channel includes a timeslot number corresponding to a resource corresponding to the determined resource number and a number of a frequency domain resource.

In an embodiment, the method further comprises: determining the resource number of a second physical side link channel mapped by at least one time-frequency resource unit in a group of physical side link channels;

the second setting formula for determining the resource number of a second physical side link channel mapped by at least one time-frequency resource unit in a set of physical side link channels includes: a source identification of the first terminal and an identification of the second terminal.

In one embodiment, the COT shared acknowledgement message is included in the SCI.

Fig. 3 is a flowchart of another information transmission method according to an embodiment, and as shown in fig. 3, the method provided in this embodiment is applicable to a third terminal, and includes

steps

310 and 320.

In step 310, COT request information is received.

In step 320, COT sharing confirmation information is transmitted.

In this embodiment, after receiving the COT sharing indication information sent by the first terminal, the second terminal sends a COT request message; after the third terminal receives the COT request information sent by the second terminal, the third terminal sends COT sharing confirmation information, and the second terminal receives the COT sharing confirmation information.

In this embodiment, the third terminal may know the time-frequency resource requested by the second terminal by receiving the COT request message; the third terminal further notifies a terminal (e.g., the second terminal) receiving the COT sharing confirmation information by sending the COT sharing confirmation information, and the second terminal may use the time-frequency resource requested by the COT request information. Therefore, the situation that the current SideLink communication does not support COT sharing is solved, and the problem of resource conflict caused by the fact that a plurality of terminals simultaneously request the same time-frequency resource in the COT sharing is solved through the COT sharing confirmation information.

In an embodiment, a mapping relationship exists between the first physical sidelink channel and a resource for transmitting COT sharing indication information.

In an embodiment, a setting mode that each time-frequency resource unit is mapped to a corresponding first physical side link channel is determined based on a first setting formula;

In an embodiment, the method further comprises:

the second physical side link channel is a PSFCH channel;

In an embodiment, a mapping relationship exists between the second physical sidelink channel and the time frequency resource where the COT sharing indication information is sent.

The following describes exemplary information transmission methods for implementing COT sharing by using different embodiments.

Fig. 4 is a schematic diagram illustrating an implementation of an information transmission method according to an embodiment. As shown in fig. 4, the first terminal transmits COT sharing indication information. And the second terminal receives the COT sharing indication information of the first terminal. The second terminal transmits COT sharing request information (i.e., COT request information). And after receiving the COT sharing request information of the second terminal, the first terminal sends COT sharing confirmation information to the second terminal.

Fig. 5 is a schematic diagram illustrating an implementation of a first terminal-side information transmission method according to an embodiment. As shown in fig. 5, the information transmission is handled from the perspective of the first terminal, which transmits COT sharing indication information. The COT sharing indication information may include a time length of the shared COT, a start time of the shared COT, and the like. Informing a slot (slot) mark of the COT sharing indication information as slot m; the first terminal may notify the start time of the shared COT in such a manner that the first terminal notifies the start time of the shared COT of a time interval of slot m. Optionally, the COT sharing indication information is included in the SCI, and the first terminal notifies the COT sharing indication information by sending the SCI. In addition to the above information, the first terminal may further indicate frequency domain resource information, where the indication of the frequency domain resource information is to enable the UE receiving the COT sharing indication information to further determine which frequency domain resources the first terminal shares within the COT time range shared by the first terminal. Or, the first terminal does not indicate the frequency domain resource information, and the UE receiving the COT sharing indication information determines which frequency domain resources in the COT time range are shared by the first terminal according to a fixed assumption, for example, the other receiving UEs assume that the frequency domain resources shared by the first terminal are an LBT subband, where the LBT subband is an LBT subband where a control channel corresponding to the COT sharing indication information sent by the first terminal is located.

The first terminal receives the COT sharing request information. The COT sharing request information may also be referred to as COT request information. The first terminal may determine which terminal is requesting the time-frequency resource in the COT through the received COT sharing request information. In addition, the first terminal may also know the time-frequency resource requested by the UE sending the COT sharing request information. The first terminal determines a shared time frequency resource set and informs the COT sharing indication information corresponding to the shared time frequency resource set. One set of shared time-frequency resources determined by the first terminal may be marked as a first set of time-frequency resources. The requested set of time frequency resources, determined by the received COT sharing request information, may be marked as a second set of time frequency resources by the first terminal. The second set of time frequency resources is identical to the first set of time frequency resources or the second set of time frequency resources belongs to a subset of the first set of time frequency resources.

The first terminal transmits COT sharing confirmation information. The COT sharing confirmation information may also be referred to as COT confirmation information. The first terminal receives COT sharing request information from at least one terminal, wherein the at least one terminal comprises a second terminal. The first terminal may determine to which terminals the COT sharing confirmation information is transmitted according to the received COT sharing request information from the at least one terminal. The COT sharing confirmation information may be used to notify a UE that transmits the COT request information that the requested COT shared resource is available to be shared by the first terminal to the UE. There may be two (or more) UEs sharing the request information through the COT and requesting the same time-frequency resource, or the time-frequency resources requested by the two (or more) UEs partially overlap. In this case, by the first terminal transmitting the COT sharing confirmation information, resource collision between the UEs can be resolved. Specifically, the first terminal may send the COT sharing confirmation information to only one UE or not send the COT sharing confirmation information to any UE among the two (or more) UEs where the resource collision occurs. The UE that does not receive the COT shared acknowledgment does not use the time-frequency resource requested by the UE.

Fig. 6 is a schematic diagram illustrating an implementation of a second terminal-side information transmission method according to an embodiment. As shown in fig. 6, information transmission is handled from the perspective of the second terminal, which receives COT sharing indication information transmitted by the first terminal. The COT sharing indication information may include a time length of the shared COT, a start time of the shared COT, and the like. In addition, the ue may further include frequency domain resource information, where the frequency domain resource information indicates that the second terminal may further determine which frequency domain resources the first terminal shares within the COT time range shared by the first terminal. Or, the second terminal determines which frequency domain resources within the COT time range the first terminal shares according to a fixed assumption, for example, the second terminal assumes that the frequency domain resource shared by the first terminal is an LBT subband, and the LBT subband is an LBT subband where a control channel corresponding to the COT sharing indication information sent by the first terminal is located.

The second terminal transmits COT sharing request information. The COT sharing request information may also be referred to as COT request information. The first terminal determines a shared time frequency resource set and informs the COT sharing indication information corresponding to the shared time frequency resource set. One set of shared time-frequency resources determined by the first terminal may be marked as a first set of time-frequency resources. The time frequency resource set requested by the COT sharing request information sent by the second terminal can be marked as a second time frequency resource set. The second set of time frequency resources is identical to the first set of time frequency resources or the second set of time frequency resources belongs to a subset of the first set of time frequency resources.

The second terminal receives the COT sharing confirmation information. The COT shared acknowledgment here may also be referred to as COT acknowledgment. And after receiving the COT sharing confirmation information, the second terminal judges whether the COT sharing confirmation information is sent to the second terminal. If so, the second terminal may use the time-frequency resource corresponding to the COT sharing request information, that is, the second terminal may use the time-frequency resource corresponding to the second time-frequency resource set to transmit the communication signal or the channel.

It should be noted that after receiving the COT sharing indication information, the second terminal may request the COT sharing resource in two ways:

mode 1: and the second terminal determines the time-frequency resource set shared by the first terminal by receiving the COT sharing indication information notified by the first terminal. The second terminal selects time frequency resources from the time frequency resource set shared by the first terminal, and the time frequency resource or resources and the PSFCH used for the COT request (that is, a channel used for transmitting the COT sharing request information is a first physical edge link channel, and the first physical edge link channel may be a PSFCH channel) are mapped according to a certain rule. Therefore, after the second terminal sends the PSFCH for the COT request, the first terminal may know the time-frequency resource sent by the second terminal. In addition, the first terminal may also recognize the identification number of the second terminal. After receiving COT sharing request information sent by a plurality of terminals, a first terminal identifies whether resources requested by the terminals conflict or not, finds out UE (user equipment) with the requested resources not conflicting, and sends COT sharing confirmation information to the terminals (including a second terminal).

Mode 2: and the second terminal determines the time-frequency resource set shared by the first terminal by receiving the COT sharing indication information notified by the first terminal. The second terminal requests all the time-frequency resource sets from the first terminal by sending COT sharing request information to the first terminal. The first terminal only needs to identify which terminals request the COT resource from it. The resource used by the first terminal for sending the COT sharing indication information is mapped with the PSFCH used by the COT sharing request information according to a certain rule (namely, a PSFCH channel for transmitting the COT sharing request information has a mapping relation with the time-frequency resource where the COT sharing indication information is sent). Thus, different UEs transmit COT sharing request information, and the used PSFCH resources are different. Thus, the first terminal may identify which UEs have requested the COT resources and transmit COT sharing confirmation information to the UEs. The UE receiving the COT sharing confirmation information uses its requested COT resource.

After receiving the COT sharing request message, the first terminal may identify which UEs request which resources. The first terminal transmits COT sharing confirmation information. Sending the COT shared acknowledgement information through the PSFCH (i.e. the COT shared acknowledgement information is transmitted through the second physical sidelink channel, which may be the PSFCH channel), there are two ways:

mode 1: and determining a time frequency resource set shared by the first terminal according to the COT sharing indication information notified by the first terminal. And mapping each time-frequency resource in the set with the PSFCH for COT sharing confirmation according to a certain rule. Thus, the second terminal can know the COT shared resource confirmed by the first terminal. The formula of the resource mapping rule of the PSFCH for the COT sharing confirmation may include the identification number of the second terminal. Thus, the second terminal can know whether the COT sharing confirmation message is addressed to itself by receiving the PSFCH. If the resource of the COT sharing confirmation information is of the second terminal, the second terminal may use the COT sharing resource.

Mode 2: and the first terminal sends the resource number corresponding to the COT sharing confirmation information, and the resource number is mapped with the identification number of the terminal according to a certain rule. Therefore, the COT sharing confirmation information carried by different resource numbers is the COT sharing confirmation information sent to different UEs. The second terminal can determine the resource used by the COT sharing confirmation information through receiving the PSFCH, so as to determine whether the COT sharing confirmation information is sent to the second terminal. And if the resource is sent to the second terminal, the second terminal uses all the resources in the time-frequency resource set determined by the COT sharing indication information. Otherwise, the second terminal does not use the time-frequency resource determined by the COT sharing indication information.

Fig. 7 is a schematic diagram illustrating an implementation of another information transmission method according to an embodiment. As shown in fig. 7, the first terminal transmits COT sharing indication information. And the second terminal receives the COT sharing indication information of the first terminal. The second terminal transmits COT sharing request information. And after receiving the COT sharing request information sent by the second terminal, the third terminal sends COT sharing confirmation information to the second terminal.

Fig. 8 is a schematic diagram illustrating an implementation of another first terminal-side information transmission method according to an embodiment. The information transmission is handled from the perspective of the first terminal, which sends COT sharing indication information. The COT sharing indication information may include a time length of the shared COT, a start time of the shared COT, and the like. The slot where the COT sharing indication information is notified may be marked as slot m, and the manner for the first terminal to notify the start time of the shared COT may be that the first terminal notifies the start time of the shared COT of the interval time of the slot m. Optionally, the COT sharing indication information is included in the SCI, and the first terminal notifies the COT sharing indication information by sending the SCI. In addition to the above information, the first terminal may further indicate frequency domain resource information, where the indication of the frequency domain resource information is to enable the UE receiving the COT sharing indication information to further determine which frequency domain resources the first terminal shares within the COT time range shared by the first terminal. Or, the first terminal does not indicate the frequency domain resource information, and the UE receiving the COT sharing indication information determines which frequency domain resources within the COT time range are shared by the first terminal according to a fixed assumption, for example, other receiving UEs assume that the frequency domain resources shared by the first terminal are an LBT subband, where the LBT subband is an LBT subband where a control channel corresponding to the COT sharing indication information sent by the first terminal is located. The COT sharing indication information sent by the first terminal may be received by different UEs, for example, may be received by the second terminal and the third terminal simultaneously.

Fig. 9 is a schematic diagram illustrating an implementation of another second terminal-side information transmission method according to an embodiment. As shown in fig. 9, information transmission is processed from the perspective of the second terminal, and the second terminal receives COT sharing indication information transmitted by the first terminal. The COT sharing indication information may include a time length of the shared COT, a start time of the shared COT, and the like. In addition, the ue may further include frequency domain resource information, where the frequency domain resource information indicates that the second terminal may further determine which frequency domain resources the first terminal shares within the COT time range shared by the first terminal. Or, the second terminal determines which frequency domain resources within the COT time range the first terminal shares according to a fixed assumption, for example, the second terminal assumes that the frequency domain resource shared by the first terminal is an LBT subband, and the LBT subband is an LBT subband where a control channel corresponding to the COT sharing indication information sent by the first terminal is located.

The second terminal transmits COT sharing request information. The COT sharing request information may also be referred to as COT request information. The second terminal may determine a shared time-frequency resource set (i.e., a time-frequency resource set shared within a COT time range) through the COT sharing indication information, and may mark the shared time-frequency resource set as the first time-frequency resource set. The time frequency resource set requested by the COT sharing request information sent by the second terminal can be marked as a second time frequency resource set. The second set of time frequency resources is identical to the first set of time frequency resources or the second set of time frequency resources belongs to a subset of the first set of time frequency resources. The second terminal transmits the COT sharing request message, which may be received by a plurality of UEs, for example, the first terminal and the third terminal.

Fig. 10 is a schematic diagram illustrating an implementation of a new transmission method at a third terminal side according to an embodiment. As shown in fig. 10, the third terminal receives the COT sharing request information transmitted by the second terminal. The COT sharing request information may also be referred to as COT request information. The third terminal may determine which terminal is requesting the time-frequency resource in the COT through the received COT sharing request information. In addition, the third terminal may also know the time-frequency resource requested by the UE transmitting the COT sharing request information. The third terminal may determine a shared time-frequency resource set, which may be marked as the first time-frequency resource set, by receiving the COT sharing indication information from the first terminal. The requested set of time frequency resources, determined by the received COT sharing request information, may be marked as a second set of time frequency resources by the third terminal. The second set of time frequency resources is identical to the first set of time frequency resources or the second set of time frequency resources belongs to a subset of the first set of time frequency resources.

The third terminal transmits COT sharing confirmation information. The COT sharing confirmation information may also be referred to as COT confirmation information. The third terminal receives COT sharing request information from at least one terminal including the second terminal. The third terminal may determine to which terminals the COT sharing confirmation information is transmitted, according to the received COT sharing request information from the at least one terminal. The COT sharing confirmation information may be used to notify the UE transmitting the COT request information that the requested COT shared resource is available, and the third terminal may share the resource to the UE. There may be two (or more) UEs sharing the request information through the COT and requesting the same time-frequency resource, or the time-frequency resources requested by the two (or more) UEs partially overlap. In this case, by the third terminal transmitting the COT sharing confirmation information, resource collision between the UEs can be resolved. Specifically, the third terminal may send the COT sharing confirmation information to only one UE or not send the COT sharing confirmation information to any UE among the two (or more) UEs where the resource collision occurs. The UE that does not receive the COT shared acknowledgment does not use the time-frequency resource requested by the UE.

In fig. 4, the first terminal transmits COT sharing indication information. And the second terminal receives the COT sharing indication information of the first terminal. The second terminal transmits COT sharing request information. And after receiving the COT sharing request information, the first terminal sends COT sharing confirmation information to the second terminal.

In an embodiment, the second terminal may indicate the COT sharing request information by transmitting the PSFCH (i.e., transmitting the COT sharing request information over the PSFCH channel). The PSFCH used to indicate COT sharing request information may be labeled as a first PSFCH. The mapping is performed according to a certain rule between the time frequency resource location of the first PSFCH (or the PSFCH sub-group where the first PFSCH is located) and the requested time frequency resource (i.e., the time frequency resource set shared within the COT time range or the subset of the time frequency resource set shared within the COT time range) (i.e., a mapping relationship exists between the first physical edge link channel and the time frequency resource set shared within the COT time range, or a mapping relationship exists between the first physical edge link channel and the subset of the time frequency resource set shared within the COT time range, where the first physical edge link channel may be a PSFCH channel for transmitting COT sharing request information). Based on the mapping rule, the second terminal indicates the time-frequency resource requested by the second terminal in an implicit mode, namely indicates the COT sharing request information in an implicit mode. The first terminal determines the time-frequency resource requested by the second terminal according to the mapping relationship between each time-frequency resource unit in the COT time-frequency resource region (i.e. the time-frequency resource set shared in the COT time range) and the time-frequency resource position of the first PSFCH (or the PSFCH subgroup where the first PFSCH is located). It should be noted that the second terminal may send multiple first PSFCHs for requesting more time-frequency resources.

Fig. 11 is a schematic diagram of a mapping relationship between each time-frequency resource unit in a COT time-frequency resource region and a PSFCH subgroup according to an embodiment. As shown in fig. 11, each time-frequency resource unit is mapped to the first physical sidelink channel (i.e. the first PFSCH) according to a predetermined manner, and in the COT time-frequency resource unitIn the mapping relationship between each time frequency resource unit in the region and the PSFCH subgroup where the first PFSCH is located, the COT time frequency resource region comprises 4 time frequency resource units (i.e. t) _1,1 、t _1,2 、t _2,1 And t _2,2 ) The frequency domain of each time-frequency resource unit is 1 subchannel (i.e., sub-channel), and the time domain of each time-frequency resource unit is one slot. And each time-frequency resource unit in the COT time-frequency resource area is mapped to one PSFCH subgroup.

In an embodiment, the second terminal indicates the COT sharing request information by transmitting the PSFCH. The resource number of the first PSFCH and the identifier of the second terminal may be mapped according to a certain rule. That is, the determination formula of the resource number of the first PSFCH includes at least the identification number of the second terminal. In addition, the determination formula of the resource number of the first PSFCH may further include, in addition to the identifier of the second terminal, a source ID of the first terminal, that is, a second setting formula for determining the resource number of one first physical edge link channel mapped by at least one time-frequency resource unit in a set of physical edge link channels may include a source identifier of the first terminal and the identifier of the second terminal. The identification number of the second terminal may be, for example, a member number within a range of a group of UEs. And based on the mapping rule, the second terminal indicates the identification number of the second terminal in an implicit mode. And after the second terminal sends the first PSFCH, the first terminal receives the first PSFCH according to the first PSFCH corresponding to each PSFCH resource number. After the first terminal receives the first PSFCH corresponding to a certain PSFCH resource number, the first terminal may infer the identifier of the terminal corresponding to the PSFCH resource number according to the mapping rule, so as to identify whether the first PSFCH indicating the COT sharing request information is sent by the second terminal. The PSFCH resource number here may include the number of one dimension or multiple dimensions in the time domain, the frequency domain, the code domain. Here, the code domain corresponds to the case of code division, for example, different code domains correspond to indexes of different cyclic shift pairs of sequences.

In an embodiment, the first terminal indicates the COT sharing acknowledgement information by sending a PSFCH (i.e., transmits the COT sharing acknowledgement information over the PSFCH channel). The PSFCH used to indicate the COT sharing confirmation information may be marked as a second PSFCH. The time-frequency resource position of the second PSFCH (or the PSFCH subgroup where the second PFSCH is located) and the indicated confirmed time-frequency resource are mapped according to a certain rule (that is, a mapping relationship exists between the PSFCH channel for transmitting the COT shared confirmation information and the time-frequency resource set shared within the COT time range). Based on the mapping rule, the first terminal indicates the time-frequency resource confirmed by the first terminal in an implicit mode, namely indicates COT sharing confirmation information in an implicit mode. And the second terminal determines the time-frequency resource confirmed by the first terminal according to the mapping relation between each time-frequency resource unit in the COT time-frequency resource region and the time-frequency resource position of the second PSFCH (or the PSFCH subgroup in which the second PFSCH is located). It should be noted that the first terminal may transmit a plurality of second PSFCHs for indicating more acknowledged time-frequency resources. In an embodiment, a mapping relationship between each time-frequency resource unit in the COT time-frequency resource region and the PSFCH sub-group where the second PFSCH is located may also be as shown in fig. 11, where the COT time-frequency resource region includes 4 time-frequency resource units, a frequency domain of each time-frequency resource unit is 1 sub-channel, and a time domain of each time-frequency resource unit is one slot. And each time-frequency resource unit in the COT time-frequency resource area is mapped to one PSFCH subgroup.

In one embodiment, the first terminal indicates the COT sharing confirmation information by transmitting the PSFCH. The resource number of the second PSFCH and the identification number of the second terminal may be mapped according to a certain rule. That is, the resource number of the second PSFCH is determined by a formula including at least the identifier of the second terminal. In addition, the determination formula of the resource number of the second PSFCH may include the source ID of the first terminal in addition to the identifier of the second terminal. The identification number of the second terminal may be, for example, a member number within a range of a group of UEs. Based on the mapping rule, the first terminal may implicitly indicate the identification number of the second terminal. And after the first terminal sends the second PSFCH, the second terminal receives the second PSFCH. When the PSFCH resource number corresponding to the second PSFCH received by the second terminal has a mapping relationship with the identification number of the second terminal, the second terminal may recognize that the COT sharing confirmation information is sent to the second terminal. The PSFCH resource number here may include the number of one dimension or multiple dimensions in the time domain, the frequency domain, the code domain. Here, the code domain corresponds to the case of code division, for example, different code domains correspond to indexes of different cyclic shift pairs of sequences.

In an embodiment, the second terminal may indicate the COT sharing request information by transmitting the PSFCH. The PSFCH indicating the COT sharing request information may be marked as a first PSFCH. And mapping the time frequency resource position of the first PSFCH (or the PSFCH subgroup where the first PFSCH is located) and the requested time frequency resource according to a certain rule. Based on the mapping rule, the second terminal indicates the time-frequency resource requested by the second terminal in an implicit mode, namely indicates the COT sharing request information in an implicit mode. And the first terminal determines the time-frequency resource requested by the second terminal according to the mapping relation between each time-frequency resource unit in the COT time-frequency resource region and the time-frequency resource position of the first PSFCH (or the PSFCH subgroup where the first PFSCH is located). It should be noted that the second terminal may send multiple first PSFCHs for requesting more time-frequency resources.

In an embodiment, a mapping relationship between each time-frequency resource unit in the COT time-frequency resource region and the PSFCH subgroup where the first PFSCH is located is as shown in fig. 11, where the COT time-frequency resource region includes 4 time-frequency resource units, a frequency domain of each time-frequency resource unit is 1 sub-channel, and a time domain of each time-frequency resource unit is one slot. And each time-frequency resource unit in the COT time-frequency resource area is mapped to one PSFCH subgroup.

In an embodiment, the second terminal indicates the COT sharing request information by transmitting the PSFCH. The resource number of the first PSFCH and the identification number of the second terminal may be mapped according to a certain rule. That is, the formula for determining the resource number of the first PSFCH includes at least the identifier of the second terminal. In addition, the determination formula of the resource number of the first PSFCH may include the source ID of the first terminal in addition to the identifier of the second terminal. The identification number of the second terminal may be, for example, a member number within a range of a group of UEs. And based on the mapping rule, the second terminal indicates the identification number of the second terminal in an implicit mode. And after the second terminal sends the first PSFCH, the first terminal receives the first PSFCH according to the first PSFCH corresponding to each PSFCH resource number. After the first terminal receives the first PSFCH corresponding to a certain PSFCH resource number, the first terminal may infer the identifier of the terminal corresponding to the PSFCH resource number according to the mapping rule, so as to identify whether the first PSFCH indicating the COT sharing request information is sent by the second terminal. The PSFCH resource number here may include the number of one dimension or multiple dimensions in the time domain, the frequency domain, the code domain. Here, the code domain corresponds to the case of code division, for example, different code domains correspond to indexes of different cyclic shift pairs of sequences.

In one embodiment, the first terminal indicates the COT sharing confirmation information by sending the SCI. The first terminal transmits an SCI including COT sharing confirmation information. The COT sharing confirmation information included in the SCI comprises: identification of at least one other terminal. The first terminal acquires which terminals send the COT sharing request information by receiving the COT sharing request information. That is, the first terminal obtains the identification number of at least one terminal corresponding to the transmission of the COT sharing request information by receiving the COT sharing request information. The first terminal selects the identification numbers of all or part of the terminals from the identification numbers of the terminals, and transmits the identification numbers of the terminals to the terminals. The identities of these terminals are included in the SCI, which the first terminal sends. Taking the example that the first terminal receives the COT sharing request information sent by the second terminal, how the first terminal obtains the identification numbers of other terminals sending the sharing request information is further described. And the second terminal indicates COT sharing request information by sending the first PSFCH, and mapping is carried out between the resource number of the first PSFCH, the identification number of the second terminal and the source ID of the first terminal according to a certain rule. That is, the determination formula of the resource number of the first PSFCH includes at least the source ID of the first terminal and the identification number of the second terminal. Based on the mapping rule, the second terminal indicates the identification number of the second terminal in an implicit mode. Accordingly, the first terminal may recognize whether the second terminal transmitted the first PSFCH indicating the COT sharing request information.

In fig. 7, the first terminal transmits COT sharing indication information. And the second terminal receives the COT sharing indication information of the first terminal. The second terminal transmits COT sharing request information. And after receiving the COT sharing request information sent by the second terminal, the third terminal sends COT sharing confirmation information to the second terminal.

In an embodiment, the second terminal may indicate the COT sharing request information by transmitting the PSFCH. The PSFCH indicating the COT sharing request information may be marked as a first PSFCH. And mapping the time frequency resource position of the first PSFCH (or the PSFCH subgroup where the first PFSCH is located) and the requested time frequency resource according to a certain rule. Based on the mapping rule, the second terminal indicates the time-frequency resource requested by the second terminal in an implicit mode, namely indicates the COT sharing request information in an implicit mode. And the third terminal determines the time-frequency resource requested by the second terminal according to the mapping relation between each time-frequency resource unit in the COT time-frequency resource area and the time-frequency resource position of the first PSFCH (or the PSFCH subgroup where the first PFSCH is located). It should be noted that the second terminal may send multiple first PSFCHs for requesting more time-frequency resources.

In an embodiment, a mapping relationship between each time-frequency resource unit in the COT time-frequency resource region and the PSFCH sub-group where the first PFSCH is located may also be as shown in fig. 11, where the COT time-frequency resource region includes 4 time-frequency resource units, each time-frequency resource unit has a frequency domain of 1 sub-channel, and a time domain of one slot. And each time-frequency resource unit in the COT time-frequency resource area is mapped to one PSFCH subgroup.

In an embodiment, the second terminal indicates the COT sharing request information by transmitting the PSFCH. The resource number of the first PSFCH and the identifier of the second terminal may be mapped according to a certain rule. That is, the determination formula of the resource number of the first PSFCH includes at least the identification number of the second terminal. In addition, the formula for determining the resource number of the first PSFCH may include the source ID of the first terminal in addition to the identifier of the second terminal. The identification number of the second terminal may be, for example, a member number within a range of a group of UEs. Based on the mapping rule, the second terminal indicates the identification number of the second terminal in an implicit mode. And after the second terminal sends the first PSFCH, the third terminal receives the first PSFCH according to the first PSFCH corresponding to each PSFCH resource number. After the third terminal receives the first PSFCH corresponding to a certain PSFCH resource number, the third terminal may infer the identifier of the terminal corresponding to the PSFCH resource number according to the mapping rule, so as to identify whether the first PSFCH indicating the COT sharing request information is sent by the second terminal. The PSFCH resource number here may include a number of one dimension or a plurality of dimensions in a time domain, a frequency domain, a code domain. The code field here corresponds to the case of code division, for example, different code fields correspond to different indexes of cyclic shift pairs of sequences.

In one embodiment, the third terminal indicates COT sharing confirmation information by transmitting the PSFCH. The PSFCH used by the third terminal to indicate the COT shared acknowledgement information may be labeled as a third PSFCH (i.e., a third physical side link channel of the third terminal). And mapping the time frequency resource position of the third PSFCH (or the PSFCH subgroup where the second PFSCH is located) and the indicated confirmed time frequency resource according to a certain rule. Based on the mapping rule, the third terminal indicates the confirmed time-frequency resource in an implicit mode, namely indicates the COT sharing confirmation information in an implicit mode. And the second terminal determines the time-frequency resource confirmed by the third terminal according to the mapping relation between each time-frequency resource unit in the COT time-frequency resource region and the time-frequency resource position of the third PSFCH (or the PSFCH subgroup where the third PFSCH is located). It should be noted that the third terminal may send a plurality of third PSFCHs for indicating more acknowledged time-frequency resources.

In an embodiment, a mapping relationship between each time-frequency resource unit in the COT time-frequency resource region and the PSFCH sub-group where the third PFSCH is located may also be as shown in fig. 11, where the COT time-frequency resource region includes 4 time-frequency resource units, each time-frequency resource unit has a frequency domain of 1 sub-channel, and a time domain of one slot. And each time-frequency resource unit in the COT time-frequency resource area is mapped to one PSFCH subgroup.

In an embodiment, the third terminal indicates the COT sharing confirmation information by transmitting the PSFCH. The resource number of the third PSFCH and the identifier of the second terminal may be mapped according to a certain rule. That is, the determination formula of the resource number of the third PSFCH includes at least the identification number of the second terminal. Furthermore, the determination formula of the resource number of the third PSFCH may include the source ID of the first terminal in addition to the identifier of the second terminal. The identification number of the second terminal may be, for example, a member number within a range of a group of UEs. Based on the mapping rule, the third terminal indicates the identification number of the second terminal in an implicit mode. And after the third terminal sends the third PSFCH, the second terminal receives the third PSFCH. When the PSFCH resource number corresponding to the third PSFCH received by the second terminal has a mapping relationship with the identification number of the second terminal, the second terminal may recognize that the COT sharing confirmation information is sent to the second terminal. The PSFCH resource number here may include the number of one dimension or multiple dimensions in the time domain, the frequency domain, the code domain. Here, the code domain corresponds to the case of code division, for example, different code domains correspond to indexes of different cyclic shift pairs of sequences.

In an embodiment, the second terminal indicates the COT sharing request information by transmitting the PSFCH. The resource number of the first PSFCH and the identifier of the second terminal may be mapped according to a certain rule. That is, the determination formula of the resource number of the first PSFCH includes at least the identification number of the second terminal. In addition, the determination formula of the resource number of the first PSFCH may include the source ID of the first terminal in addition to the identifier of the second terminal. The identification number of the second terminal may be, for example, a member number within a range of a group of UEs. And based on the mapping rule, the second terminal indicates the identification number of the second terminal in an implicit mode. And after the second terminal sends the first PSFCH, the third terminal receives the first PSFCH according to the first PSFCH corresponding to each PSFCH resource number. After the third terminal receives the first PSFCH corresponding to a certain PSFCH resource number, the third terminal may infer the identifier of the terminal corresponding to the PSFCH resource number according to the mapping rule, so as to identify whether the first PSFCH indicating the COT sharing request information is sent by the second terminal. The PSFCH resource number here may include the number of one dimension or multiple dimensions in the time domain, the frequency domain, the code domain. The code field here corresponds to the case of code division, for example, different code fields correspond to different indexes of cyclic shift pairs of sequences.

In one embodiment, the third terminal indicates COT sharing confirmation information by sending the SCI. The third terminal transmits an SCI including COT sharing confirmation information. The COT sharing confirmation information included in the SCI comprises: identification of at least one other terminal. The third terminal knows which terminals sent the COT sharing request information by receiving the COT sharing request information. That is, the third terminal obtains the identification number of at least one terminal corresponding to the transmission of the COT sharing request information by receiving the COT sharing request information. The third terminal selects the identification numbers of all or part of the terminals from the identification numbers of the terminals, and transmits the identification numbers of the terminals to the terminals. The identities of these terminals are included in the SCI and the third terminal transmits the SCI. Taking the example that the third terminal sends the COT sharing request information by receiving the second terminal, how the third terminal obtains the identification numbers of other terminals sending the COT sharing request information is further described. The second terminal indicates COT sharing request information, the resource number of the first PSFCH, the identification number of the second terminal and the source ID of the first terminal by sending the first PSFCH, and mapping is carried out according to a certain rule. That is, the determination formula of the resource number of the first PSFCH includes at least the source ID of the first terminal and the identifier of the second terminal. Based on the mapping rule, the second terminal indicates the identification number of the second terminal in an implicit mode. Accordingly, the third terminal may recognize whether the second terminal transmitted the first PSFCH indicating the COT sharing request information. It should be noted that, before the third terminal determines the identification number of the second terminal based on the mapping rule, the source ID of the first terminal is obtained by receiving the COT sharing indication information sent by the first terminal. The source ID may be considered as a part of the COT sharing indication information transmitted by the first terminal.

In fig. 4 or fig. 7, the second terminal receives COT sharing indication information of the first terminal. The second terminal transmits COT sharing request information. In an embodiment, the second terminal indicates the COT sharing request information by transmitting the PSFCH. The PSFCH used to indicate COT sharing request information may be labeled as a first PSFCH.

In an embodiment, the COT sharing indication information indicates a COT time range, which includes several time-frequency resource elements. Fig. 12 is a schematic diagram illustrating an implementation of a time-frequency resource unit within a COT time range according to an embodiment. Fig. 13 is a schematic diagram illustrating implementation of time-frequency resource units within a COT time range according to another embodiment. As shown in fig. 12 or fig. 13, the COT time range includes 16 time-frequency resource units, where a frequency domain of each time-frequency resource unit is a subchannel, and a time domain is a slot (i.e., a time slot). The COT time range includes 16 time-frequency resource unit numbers (i.e. the number of time slots and frequency-domain resources in the time-frequency resource set or subset shared in the COT time range). Mapping the time frequency resource units included in the COT time range with the PSFCH subgroup according to a certain mapping rule, namely mapping each time frequency resource unit to a first physical side link channel according to a set mode, wherein the first physical side link channel is a PSFCH channel; the setting mode of mapping each time-frequency resource unit to the corresponding PSFCH channel is determined based on a first setting formula, and the first setting formula used for determining at least one resource number of the corresponding PSFCH channel comprises the time slot number and the frequency domain resource number in the time-frequency resource set or the subset shared in the COT time range. The time frequency resource unit numbered 1 included in the COT time range is mapped to the PSFCH subgroup 1, the time frequency resource unit numbered 2 is mapped to the PSFCH subgroup 2, and so on. For each PSFCH subgroup, several time-frequency resources are included that can be used for transmission or reception of the PSFCH.

Fig. 14 is a schematic diagram of an implementation of a PSFCH subgroup according to an embodiment. As shown in fig. 14, each PSFCH subgroup includes 4 time-frequency resources available for transmission or reception of PSFCH, and each PSFCH (i.e., the PSFCH Resource location of UE1, the PSFCH Resource location of UE2, the PSFCH Resource location of UE3, or the PSFCH Resource location of UE 4) occupies one Physical Resource Block (PRB). In addition, each PSFCH may also occupy one interleaved resource block, where one interleaved resource block includes several frequency-domain discrete PRBs. After the first terminal or the third terminal receives the PSFCH sent by the second terminal, by determining which PSFCH subgroup the received time-frequency resource corresponding to the PSFCH belongs to, it may be determined which time-frequency resource units included in the COT time range are requested by the second terminal according to a mapping relationship between the time-frequency resource units included in the COT time range and the PSFCH subgroup. (mapping relationship between resource to be requested and PSFCH subgroup)

In an embodiment, after determining the PSFCH subgroup, the second terminal further determines the PSFCH resource number of the PSFCH it transmits within the PSFCH subgroup (i.e., within the set of physical sidelink channels) (i.e., determines the resource number of the PSFCH channel within the set of physical sidelink channels to which the at least one time-frequency resource unit is mapped). The second terminal determines the resource number of the PSFCH for indicating the COT sharing request information according to the identifier of the second terminal and the source ID of the first terminal (that is, a second setting formula for determining the resource number of a first physical edge link channel mapped by at least one time-frequency resource unit in a set of physical edge link channels includes the source identifier of the first terminal and the identifier of the second terminal). And the first terminal (or the third terminal) determines which time-frequency resource unit or units in the COT time range are requested by the second terminal by judging the PSFCH subgroup in which the received PSFCH for indicating the COT sharing request information is located. Further, the first terminal (or the third terminal) may determine which terminal or terminals sent the COT sharing request information by determining the time-frequency resource number (i.e., the PSFCH resource number) of the received PSFCH in the PSFCH subgroup. It can be seen that the first terminal may identify which terminal or terminals sent the COT sharing request information (PSFCH resource number of the PSFCH within the PSFCH subgroup) and may identify the COT resource requested by the terminal or terminals (number of the PSFCH subgroup corresponding to the PSFCH).

In an embodiment, after finding the mapped PSFCH sub-group, the second terminal further determines a PSFCH resource number of the PSFCH in the PSFCH sub-group, where the PSFCH is used to indicate the COT sharing request information, and sends a PSFCH corresponding to the PSFCH resource number, where the PSFCH is used to indicate the COT sharing request information. And the second terminal determines the PSFCH resource number of the PSFCH in the PSFCH subgroup for indicating the COT sharing request information according to the identification number of the second terminal and the source ID of the first terminal. The second terminal transmits one PSFCH in each determined PSFCH subgroup. Assume that the resource numbers of the time-frequency resource units to be requested determined by the second terminal are 1, 2, 7 and 8. According to the mapping relationship, the second terminal finds the PSFCH subgroups mapped by the resource numbers, namely mapped

PSFCH subgroups

1, 2, 7 and 8.

Fig. 15 is a schematic diagram of an implementation of another PSFCH subgroup according to an embodiment. As shown in fig. 15, the second terminal determines, according to the identifier of the second terminal and the source ID of the first terminal, a PSFCH resource number of the PSFCH indicating the COT sharing request information, which is located in the PSFCH resource location numbered 3 of

PSFCH subgroups

1, 2, 7, and 8 (i.e., the PSFCH resource location of UE 3), that is, a third PSFCH resource location in PSFCH subgroup 1, a third PSFCH resource location in PSFCH subgroup 2, a third PSFCH resource location in PSFCH subgroup 7, and a third PSFCH resource location in PSFCH subgroup 8. The second terminal transmits 4 PSFCHs on 4 PSFCH resource locations in the 4 PSFCH subgroups, respectively. The first terminal (or the third terminal) may know that the time-frequency resources numbered 1, 2, 7, and 8 in the COT time range are requested by the received 4 PSFCHs respectively located in the

PSFCH subgroups

1, 2, 7, and 8. And the first terminal deduces which UE requests the time-frequency resources numbered 1, 2, 7 and 8 in the COT time range from the PSFCH received in the

PSFCH subgroups

1, 2, 7 and 8 and the PSFCH resource number in the PSFCH subgroup. After determining the PSFCH subgroup, the second terminal further determines the PSFCH resource number of the PSFCH sent by the second terminal in the PSFCH subgroup. And the second terminal determines the PSFCH resource number of the PSFCH for indicating the COT sharing request information according to the identification number of the second terminal and the source ID of the first terminal. And the first terminal (or the third terminal) determines which time-frequency resource unit or units in the COT time range are requested by the second terminal by judging the PSFCH subgroup in which the received PSFCH for indicating the COT sharing request information is located. Further, the first terminal (or the third terminal) may determine which terminal or terminals sent the COT sharing request message by determining the PSFCH resource number of the received PSFCH in the PSFCH subgroup. It can be seen that the first terminal may identify which terminal or terminals sent the COT sharing request information, and may identify the COT resource requested by the terminal or terminals.

In an embodiment, after finding the mapped PSFCH sub-group, the second terminal further determines a PSFCH resource number of the PSFCH in the PSFCH sub-group, where the PSFCH is used to indicate the COT sharing request information, and sends a PSFCH corresponding to the PSFCH resource number, where the PSFCH is used to indicate the COT sharing request information. And the second terminal determines the PSFCH resource number of the PSFCH in the PSFCH subgroup for indicating the COT sharing request information according to the identification number of the second terminal and the source ID of the first terminal. The second terminal transmits one PSFCH in each determined PSFCH subgroup. Assume that the resource numbers of the time-frequency resource units to be requested determined by the second terminal are 1, 2, 7 and 8. According to the mapping relationship, the second terminal finds the PSFCH subgroups mapped by the resource numbers, and the mapped PSFCH subgroups are

PSFCH subgroups

1, 2, 7 and 8.

Fig. 16 is a schematic diagram of an implementation of a PSFCH subgroup according to an embodiment. As shown in fig. 16, each PSFCH subgroup includes 4 PSFCHs, each PSFCH occupies 4 PRBs, and the 4 PSFCHs correspond to different cyclic shifts of the same sequence. These 4 PSFCHs have different PSFCH resource numbers. And the second terminal determines the resource number of the PSFCH for indicating the COT sharing request information according to the identification number of the second terminal and the source ID of the first terminal, and the PSFCH resource position with the number of 3 in the

PSFCH subgroups

1, 2, 7 and 8. The second terminal transmits 4 PSFCHs at 4 PSFCH resource locations in the 4 PSFCH subgroups, respectively. The first terminal (or the third terminal) may know that the time-frequency resources numbered 1, 2, 7, and 8 in the COT range are requested by the received 4 PSFCHs respectively located in the

PSFCH subgroups

1, 2, 7, and 8. And the first terminal deduces which UE requests the time-frequency resources numbered 1, 2, 7 and 8 in the COT range according to the PSFCH resource numbers of the received PSFCHs in the

PSFCH subgroups

1, 2, 7 and 8. After determining the PSFCH subgroup, the second terminal further determines the PSFCH resource number of the PSFCH sent by the second terminal in the PSFCH subgroup. And the second terminal determines the PSFCH resource number of the PSFCH for indicating the COT sharing request information according to the identification number of the second terminal and the source ID of the first terminal. And the first terminal (or the third terminal) determines which time-frequency resource unit or units in the COT time range are requested by the second terminal by judging the PSFCH subgroup in which the received PSFCH for indicating the COT sharing request information is located. Further, the first terminal (or the third terminal) may determine which terminal or terminals sent the COT sharing request information by determining the resource number of the received PSFCH in the PSFCH subgroup. It can be seen that the first terminal may identify which terminal or terminals sent the COT sharing request information, and may identify the COT resource requested by the terminal or terminals.

In fig. 4 or 7, the first terminal (or the third terminal) receives the COT sharing request information of the second terminal. The first terminal (or the third terminal) transmits the COT sharing confirmation information. In an embodiment, the first terminal (or the third terminal) indicates the COT sharing confirmation information by transmitting the PSFCH. The PSFCH used by the first terminal to indicate the COT sharing confirmation information may be marked as a second PSFCH, and the PSFCH used by the third terminal to indicate the COT sharing confirmation information may be marked as a third PSFCH.

In an embodiment, the COT sharing indication information indicates a COT time range including several time-frequency resource units.

Fig. 17 is a schematic diagram illustrating an implementation of a time-frequency resource unit within a COT time range according to an embodiment. Fig. 18 is a schematic diagram illustrating an implementation of a time-frequency resource unit within a COT time range according to an embodiment. As shown in fig. 17 or fig. 18, the COT time range includes 16 time-frequency resource units, a frequency domain of each time-frequency resource unit is a subchannel, and a time domain is a slot. The COT time range includes 16 numbers of time frequency resource units. The time frequency resource units included in the COT time range are mapped with the PSFCH subgroup according to a certain mapping rule, namely, the time frequency resource set shared in the COT time range comprises a plurality of time frequency resource units, each time frequency resource unit is mapped to a second physical side link channel (or a third physical side link channel) according to a set mode, and the second physical side link channel (or the third physical side link channel) is a PSFCH channel. The time frequency resource unit numbered 1 included in the COT time range is mapped to the PSFCH subgroup 1, the time frequency resource unit numbered 2 is mapped to the PSFCH subgroup 2, and so on. For each PSFCH subgroup, several time-frequency resources are included that can be used for transmission or reception of the PSFCH. As shown in fig. 14, each PSFCH subgroup includes 4 time-frequency resources available for transmission or reception of a PSFCH, and each PSFCH occupies one PRB. In addition, each PSFCH may also occupy one interleaved resource block, which contains several frequency-domain discrete PRBs. After receiving the PSFCH used for indicating the COT shared acknowledgment information and sent by the first terminal (or the third terminal), the second terminal determines, by determining which PSFCH subgroup the received time-frequency resource corresponding to the PSFCH belongs to, whether the time-frequency resource unit included in the COT time range determined by the first terminal is the time-frequency resource requested by the second terminal according to a mapping relationship between the time-frequency resource unit included in the COT time range and the PSFCH subgroup.

In an embodiment, after the first terminal (or the third terminal) determines the PSFCH subgroup, it further determines the PSFCH resource number of the PSFCH that it transmits in the PSFCH subgroup (i.e., determines the resource number of at least one time-frequency resource unit in the set of physical sidelink channels of the mapped PSFCH channel). The first terminal (or the third terminal) determines the PSFCH resource number of the PSFCH for indicating the COT shared acknowledgement information according to the identifier of the second terminal and the source ID of the first terminal (i.e. a third setting formula for determining the resource number of a PSFCH channel mapped by at least one time-frequency resource unit in a set of physical sidelink channels includes the source identifier of the first terminal and the identifier of the second terminal). And the second terminal determines the time-frequency resource unit in the COT time range confirmed by the first terminal (or the third terminal) by judging the PSFCH subgroup in which the received PSFCH used for indicating the COT sharing confirmation information is located. Further, the second terminal determines whether the COT sharing confirmation information is sent to the second terminal by determining the time-frequency resource number of the received PSFCH in the PSFCH subgroup. It can be seen that the second terminal can identify which time frequency resources are confirmed by the COT sharing confirmation information, and can identify whether the time frequency resources are own.

In an embodiment, after the first terminal (or the third terminal) finds the mapped PSFCH subgroup, a PSFCH resource number in the PSFCH subgroup for indicating the PSFCH of the COT sharing confirmation information is further determined, and the PSFCH corresponding to the PSFCH resource number is sent for indicating the COT sharing confirmation information. And the first terminal (or the third terminal) determines the PSFCH resource number of the PSFCH in the PSFCH subgroup for indicating the COT sharing confirmation information according to the identification number of the second terminal and the source ID of the first terminal. The first terminal (or the third terminal) transmits one PSFCH in each determined PSFCH subgroup. Assume that the resource numbers of the request time-frequency resource units determined by the first terminal (or the third terminal) are 1, 2, 7 and 8. According to the mapping relationship, the first terminal (or the third terminal) finds the PSFCH subgroups mapped by the resource numbers, the mapped

PSFCH subgroups

1, 2, 7 and 8.

Fig. 19 is a schematic diagram illustrating an implementation of another PSFCH subgroup according to an embodiment. Further, as shown in fig. 19, the first terminal (or the third terminal) determines, according to the identifier of the second terminal and the source ID of the first terminal, the PSFCH resource number of the PSFCH indicating the COT sharing confirmation information, and the PSFCH resource location with number 3 in

PSFCH subgroups

1, 2, 7 and 8, that is, the third PSFCH resource location in PSFCH subgroup 1, the third PSFCH resource location in PSFCH subgroup 2, the third PSFCH resource location in PSFCH subgroup 7, and the third PSFCH resource location in PSFCH subgroup 8. The first terminal (or the third terminal) transmits 4 PSFCHs on 4 PSFCH resource locations in the 4 PSFCH subgroups, respectively. The second terminal may know that the time-frequency resources numbered 1, 2, 7, and 8 in the COT time range are acknowledged by locating the received 4 PSFCHs in the

PSFCH subgroups

1, 2, 7, and 8, respectively, and may identify whether these acknowledged time-frequency resources are the previously requested resources. And the second terminal determines whether the PSFCH corresponding to the PSFCH resource number in the PSFCH subgroup is sent to the second terminal or not according to the PSFCH received in the

PSFCH subgroups

1, 2, 7 and 8 and the PSFCH resource number in the PSFCH subgroup. After determining the PSFCH subgroup, the first terminal (or the third terminal) further determines the PSFCH resource number of the PSFCH transmitted by the first terminal in the PSFCH subgroup. The first terminal (or the third terminal) determines a PSFCH resource number of a PSFCH used for indicating COT sharing confirmation information according to the identification number of the second terminal and the source ID of the first terminal. The second terminal determines which time-frequency resource units in the COT time range determined by the first terminal (or the third terminal) are by determining the PSFCH subgroup in which the received PSFCH indicating the COT shared acknowledgement information is located, and may identify whether the determined time-frequency resources are the previously requested resources. Further, the second terminal may determine, by determining the PSFCH resource number of the received PSFCH in the PSFCH sub-group, whether the PSFCH corresponding to the PSFCH resource number in the PSFCH sub-group is addressed to itself. It can be seen that the second terminal may identify whether the time-frequency resource indicated by the COT sharing confirmation information is a COT resource requested by itself before, and may identify whether the resource indicated by the COT sharing confirmation information is addressed to itself. If the second terminal determines that the time-frequency resource indicated by the COT sharing confirmation information is the COT resource requested by the second terminal before, and the COT sharing confirmation information is sent to the second terminal, the second terminal may use the time-frequency resource indicated by the COT sharing confirmation information.

In an embodiment, after the first terminal (or the third terminal) finds the mapped PSFCH sub-group, a PSFCH resource number of the PSFCH in the PSFCH sub-group for indicating the COT sharing confirmation information is further determined, and the PSFCH corresponding to the PSFCH resource number is sent for indicating the COT sharing confirmation information. And the first terminal (or the third terminal) determines the PSFCH resource number of the PSFCH in the PSFCH subgroup for indicating the COT sharing confirmation information according to the identification number of the second terminal and the source ID of the first terminal. The first terminal (or the third terminal) transmits one PSFCH in each determined PSFCH subgroup. Assume that the resource numbers of the time-frequency resource units to be requested determined by the first terminal (or the third terminal) are 1, 2, 7 and 8. According to the mapping relationship, the first terminal (or the third terminal) finds the PSFCH subgroups mapped by the resource numbers, and the mapped PSFCH subgroups are

PSFCH subgroups

1, 2, 7 and 8.

Fig. 20 is a schematic diagram of an implementation of a PSFCH subgroup according to an embodiment. As shown in fig. 20, each PSFCH subgroup includes 4 PSFCHs, each PSFCH occupies 4 PRBs, and the 4 PSFCHs correspond to different cyclic shifts of the same sequence. These 4 PSFCHs have different PSFCH resource numbers. The first terminal (or the third terminal) determines the PSFCH resource number of the PSFCH used for indicating the COT sharing confirmation information, and the PSFCH resource with the number of 3 in the

PSFCH subgroups

1, 2, 7 and 8 according to the identification number of the second terminal and the source ID of the first terminal. The first terminal (or the third terminal) transmits 4 PSFCHs at 4 PSFCH resource locations in the 4 PSFCH subgroups, respectively. The second terminal, by locating the received 4 PSFCHs in the

PSFCH subgroups

1, 2, 7, and 8, may know that the time-frequency resources numbered 1, 2, 7, and 8 in the COT range are acknowledged, and may identify whether these acknowledged time-frequency resources are previously requested resources by itself. And the second terminal determines whether the PSFCH corresponding to the PSFCH resource number in the PSFCH subgroup is sent to the second terminal or not according to the PSFCH received in the

PSFCH subgroups

1, 2, 7 and 8 and the PSFCH resource number in the PSFCH subgroup. After determining the PSFCH subgroup, the first terminal (or the third terminal) further determines the PSFCH resource number of the PSFCH transmitted by the first terminal in the PSFCH subgroup. The first terminal (or the third terminal) determines a PSFCH resource number of a PSFCH used for indicating COT sharing confirmation information according to the identification number of the second terminal and the source ID of the first terminal. The second terminal determines which time-frequency resource units in the time range of the COT determined by the first terminal (or the third terminal) are by determining the PSFCH subgroup in which the received PSFCH indicating the COT sharing confirmation information is located, and may identify whether the determined time-frequency resources are the previously requested resources. Further, the second terminal may determine, by determining the PSFCH resource number of the received PSFCH in the PSFCH sub-group, whether the PSFCH corresponding to the PSFCH resource number in the PSFCH sub-group is addressed to itself. It can be seen that the second terminal may identify whether the time-frequency resource indicated by the COT sharing confirmation information is a COT resource requested by itself before, and may identify whether the resource indicated by the COT sharing confirmation information is addressed to itself. If the second terminal determines that the time-frequency resource indicated by the COT sharing confirmation information is the COT resource requested by the second terminal before, and the COT sharing confirmation information is sent to the second terminal, the second terminal may use the time-frequency resource indicated by the COT sharing confirmation information.

The embodiment of the application also provides an information transmission device. Fig. 21 is a schematic structural diagram of an information transmission apparatus according to an embodiment. As shown in fig. 21, the information transmission apparatus may be configured at the first terminal, and includes:

a first sending module 410 configured to send COT sharing indication information;

the first receiving module 420 is configured to receive the COT request message.

In the information transmission apparatus of this embodiment, the first terminal may notify a terminal (e.g., the second terminal) receiving the COT sharing indication information by sending the COT sharing indication information, where the first terminal shares which time-frequency resources; the first terminal may also know the time-frequency resources requested by the terminal (e.g., the second terminal) that sent the COT request information by receiving the COT request information. Therefore, the problem that COT sharing is not supported in the existing SideLink communication is solved.

In an embodiment, a resource index corresponding to a channel transmitting the COT request information satisfies one or more of the following:

the resource index corresponding to the channel for sending the COT request information has a mapping relation with the subset in the time frequency resource set shared in the COT time range.

the first physical side link channel is a PSFCH channel;

In one embodiment, the apparatus further comprises:

a first number determining module, configured to determine a resource number of a first physical edge link channel mapped by at least one time-frequency resource unit in a set of physical edge link channels;

In one embodiment, the apparatus further comprises:

and the first confirmation information sending module is configured to send COT sharing confirmation information.

the second physical side link channel is a PSFCH channel;

In an embodiment, a mapping relationship exists between the second physical sidelink channel and the time frequency resource set shared in the COT time range; or,

In one embodiment, the apparatus further comprises:

a second number determining module, configured to determine a resource number of a second physical side link channel mapped by at least one time-frequency resource unit in a group of physical side link channels;

the third setting formula for determining the resource number of a second physical side link channel mapped by at least one time-frequency resource unit in a set of physical side link channels includes: a source identification of the first terminal and an identification of the second terminal.

The information transmission apparatus proposed in the present embodiment and the information transmission method proposed in the above embodiments belong to the same inventive concept, and technical details that are not described in detail in the present embodiment can be referred to any of the above embodiments, and the present embodiment has the same advantageous effects as performing the information transmission method.

The embodiment of the application also provides an information transmission device. Fig. 22 is a schematic structural diagram of an information transmission apparatus according to an embodiment. As shown in fig. 22, the information transmission apparatus may be configured at the second terminal, and includes:

a second receiving module 510, configured to receive COT sharing indication information;

a second sending module 520 configured to send COT request information;

a third receiving module 530 configured to receive the COT sharing confirmation information.

In the information transmission apparatus of this embodiment, the second terminal may know which time-frequency resources the first terminal shares by receiving the COT sharing indication information; then, the terminal (such as the first terminal or the third terminal) receiving the COT request information is informed of which time-frequency resources to be requested by sending the COT request information; finally, it can be determined that the requested time-frequency resource can be used at this time by receiving the COT sharing confirmation information. Therefore, the situation that the current SideLink communication does not support COT sharing can be solved, and the problem of resource conflict caused by the fact that a plurality of terminals simultaneously request the same time-frequency resource in COT sharing can be solved through the COT sharing confirmation information.

In one embodiment, the COT request message is transmitted over a first physical edge link channel.

In one embodiment, the apparatus further comprises:

and the set determining module is set to determine a time frequency resource set shared in the COT time range according to the COT sharing indication information, wherein the time frequency resource set comprises a plurality of time frequency resource units, and each time frequency resource unit is mapped to the first physical side link channel according to a set mode.

In one embodiment, the apparatus further comprises:

a third number determining module, configured to determine a resource number of a first physical edge link channel mapped by at least one time-frequency resource unit in a group of physical edge link channels;

the third physical side link channel is a PSFCH channel;

the first setting formula for determining at least one resource number of the corresponding second physical side link channel includes a time slot number and a frequency domain resource number in a time frequency resource set or a subset shared in a COT time range.

In one embodiment, the apparatus further comprises:

a fourth number determining module, configured to determine a resource number of a second physical side link channel mapped by at least one time-frequency resource unit in a group of physical side link channels;

In one embodiment, the COT shared acknowledgement information is contained within the SCI.

The embodiment of the application also provides an information transmission device. Fig. 23 is a schematic structural diagram of an information transmission apparatus according to an embodiment. As shown in fig. 23, the information transmission apparatus may be configured at a third terminal, and includes:

a fourth receiving module 610 configured to receive COT request information;

a third sending module 620, configured to send the COT sharing confirmation information.

In the information transmission apparatus of this embodiment, the third terminal may know the time-frequency resource requested by the second terminal by receiving the COT request information; the third terminal also notifies a terminal (such as the second terminal) receiving the COT sharing confirmation information by sending the COT sharing confirmation information, and the second terminal may use the time-frequency resource requested by the COT request information. Therefore, the problem that the current SideLink communication does not support COT sharing is solved, and the problem of resource conflict caused by the fact that a plurality of terminals simultaneously request the same time-frequency resource in COT sharing is solved through the COT sharing confirmation information.

In one embodiment, the apparatus further comprises:

a fifth number determining module, configured to determine a resource number of a first physical edge link channel mapped by at least one time-frequency resource unit in a group of physical edge link channels;

the second physical side link channel is a PSFCH channel;

In one embodiment, the apparatus further comprises:

a sixth number determining module configured to determine a resource number of a second physical side link channel mapped by at least one time-frequency resource unit in a group of physical side link channels;

Fig. 24 is a schematic diagram of a hardware structure of a user terminal according to an embodiment, as shown in fig. 24, the user terminal provided in the present application may include a first terminal, a second terminal, and a third terminal, and includes a memory 720, a processor 710, and a computer program stored in the memory and capable of running on the processor, and the processor 710 implements the information transmission method when executing the program.

The user terminal may also include memory 720; the processor 710 in the user terminal may be one or more, and one processor 710 is taken as an example in fig. 24; memory 720 is used to store one or more programs; the one or more programs are executed by the one or more processors 710, such that the one or more processors 710 implement the information transmission methods as described in the embodiments of the present application.

The user terminal further includes: a communication device 730, an input device 740, and an output device 750.

The processor 710, the memory 720, the communication device 730, the input device 740, and the output device 750 in the user terminal may be connected by a bus or other means, and are exemplified by being connected by a bus in fig. 24.

The input device 740 may be used to receive input numeric or character information and generate key signal inputs related to user settings and function control of the user terminal. The output device 750 may include a display device such as a display screen.

The communication device 730 may include a receiver and a transmitter. The communication device 730 is configured to perform information transceiving communication according to the control of the processor 710.

The memory 720, which is a computer-readable storage medium, may be configured to store software programs, computer-executable programs, and modules, such as program instructions/modules corresponding to the information transmission method according to the embodiments of the present application (for example, the first sending module 410 and the first receiving module 420 in the information transmission apparatus, or the second receiving module 510, the second sending module 520, and the third receiving module 530 in the information transmission apparatus, or the fourth receiving module 610 and the third sending module 620 in the information transmission apparatus). The memory 720 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 user terminal, and the like. Further, the memory 720 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 720 may further include memory located remotely from the processor 710, which may be connected to the user terminal over 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 information transmission method in any one of the embodiments of the present application is implemented.

Optionally, the information transmission method is applied to a first terminal, and includes: sending COT sharing indication information; COT request information is received.

Optionally, the information transmission method is applied to a second terminal, and includes: receiving COT sharing indication information; sending COT request information; COT sharing confirmation information is received.

Optionally, the information transmission method is applied to a third terminal, and includes: receiving COT request information; and sending COT sharing confirmation information.

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 electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination of the foregoing. 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 mobile phones, portable data processing devices, portable web browsers or vehicle-mounted mobile stations.

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 a 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 accompanying drawings and the appended claims, without departing from the scope of the application. Accordingly, the proper scope of the application is to be determined according to the claims.

Claims

1. An information transmission method, applied to a first terminal, the method comprising:

sending channel occupation time COT sharing indication information;

COT request information is received.

2. The method of claim 1, wherein a resource index corresponding to a channel for transmitting the COT request information satisfies one or more of the following:

a resource index corresponding to a channel for sending the COT request information has a mapping relation with a time frequency resource where the COT sharing indication information is sent;

a resource index corresponding to a channel for sending the COT request information has a mapping relation with a time frequency resource set shared in a COT time range;

3. The method of claim 1, wherein the COT request message is transmitted via a first physical sidelink channel.

4. The method of claim 3, wherein the first physical sidelink channel satisfies one or more of:

the first physical side link channel is a physical side link feedback channel PSFCH channel;

the first physical side link channel occupies a plurality of resource elements in 2 Orthogonal Frequency Division Multiplexing (OFDM) symbols in one time slot, wherein the resource elements mapped by the first physical side link channel on the 1 st OFDM symbol are obtained by copying the resource elements mapped by the first physical side link channel on the 2 nd OFDM symbol.

5. The method of claim 3, wherein the first physical sidelink channel has a mapping relationship with a time frequency resource where the COT sharing indication information is sent.

6. The method of claim 3, wherein the first physical sidelink channel is mapped to a set of time-frequency resources shared within a COT time range; or,

and the first physical side link channel has a mapping relation with subsets in the time frequency resource set shared in the COT time range.

7. The method of claim 3,

the time frequency resource set shared in the COT time range comprises a plurality of time frequency resource units, and each time frequency resource unit is mapped to the first physical side link channel according to a set mode.

8. The method of claim 7,

the setting mode of each time-frequency resource unit mapped to the corresponding first physical side link channel is determined based on a first setting formula;

9. The method of claim 7, further comprising:

the second setting formula for determining the resource number of a first physical side link channel mapped by at least one time-frequency resource unit in the set of physical side link channels includes: a source identification of the first terminal and an identification of the second terminal.

10. The method of claim 1, further comprising:

and sending COT sharing confirmation information.

11. The method of claim 10, wherein the COT shared acknowledgement information is transmitted over a second physical sidelink channel.

12. The method of claim 11, wherein the second physical sidelink channel is one or more of:

the second physical side link channel is a PSFCH channel;

the second physical side link channel occupies a plurality of resource elements in 2 Orthogonal Frequency Division Multiplexing (OFDM) symbols in one time slot, wherein the resource elements mapped by the first physical side link channel on the 1 st OFDM symbol are obtained by copying the resource elements mapped by the first physical side link channel on the 2 nd OFDM symbol.

13. The method of claim 11, wherein the second physical side link channel has a mapping relationship with a time frequency resource where the COT sharing indication information is sent.

14. The method of claim 11,

the second physical side link channel and the time frequency resource set shared in the COT time range have a mapping relation; or,

and the second physical side link channel has a mapping relation with a subset in the time frequency resource set shared in the COT time range.

15. The method of claim 11, wherein the set of time frequency resources shared within the COT time range comprises a plurality of time frequency resource units, and each time frequency resource unit is mapped to the second physical sidelink channel in a predetermined manner.

16. The method of claim 15, further comprising:

determining the resource number of the second physical side link channel mapped by at least one time-frequency resource unit in a group of physical side link channels;

17. The method of claim 11 wherein the COT shared acknowledgement information is contained within Sidelink Control Information (SCI).

18. The method of claim 11, wherein the COT sharing confirmation information comprises a terminal identification number of at least one terminal, and wherein the terminal identification number is used for confirmation of the COT sharing confirmation information.

19. An information transmission method applied to a second terminal, the method comprising:

receiving COT sharing indication information;

sending COT request information;

COT sharing confirmation information is received.

20. The method of claim 19, wherein the COT request message is transmitted via a first physical sidelink channel.

21. The method of claim 20, wherein the first physical sidelink channel has a mapping relationship with a time frequency resource where the COT sharing indication information is transmitted.

22. The method of claim 20,

the first physical side link channel and a time frequency resource set shared in a COT time range have a mapping relation; or,

and the first physical side link channel has a mapping relation with a subset in the time frequency resource set shared in the COT time range.

23. The method of claim 20, further comprising:

and determining a time frequency resource set shared in a COT time range according to the COT sharing indication information, wherein the time frequency resource set comprises a plurality of time frequency resource units, and each time frequency resource unit is mapped to the first physical side link channel according to a set mode.

24. The method of claim 23,

25. The method of claim 23, further comprising:

26. The method of claim 19, wherein the COT shared acknowledgement information is transmitted over a second physical side-link channel or a third physical side-link channel of a third terminal.

27. The method of claim 26, wherein the third physical side-link channel satisfies one or more of the following:

the third physical side link channel is a PSFCH channel;

the third physical side link channel occupies a plurality of resource elements in 2 Orthogonal Frequency Division Multiplexing (OFDM) symbols in one time slot, wherein the resource elements mapped by the first physical side link channel on the 1 st OFDM symbol are obtained by copying the resource elements mapped by the first physical side link channel on the 2 nd OFDM symbol.

28. An information transmission method applied to a third terminal, the method comprising:

receiving COT request information;

and sending COT sharing confirmation information.

29. A user terminal, comprising: memory, a processor and a computer program stored on the memory and executable on the processor, the processor implementing the method according to any of claims 1-28 when executing the program.

30. A computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out the method according to any one of claims 1-28.