CN117255415A

CN117255415A - Method and device for sharing time occupied by channel of sidelink and transmitting sidelink

Info

Publication number: CN117255415A
Application number: CN202210636167.1A
Authority: CN
Inventors: 李萍; 纪子超
Original assignee: Vivo Mobile Communication Co Ltd
Current assignee: Vivo Mobile Communication Co Ltd
Priority date: 2022-06-07
Filing date: 2022-06-07
Publication date: 2023-12-19

Abstract

The application discloses a method and a device for sharing time occupied by a channel of a secondary link and transmitting the secondary link, which belong to the technical field of communication, and the method for sharing the time occupied by the channel of the secondary link disclosed by the embodiment of the application comprises the following steps: determining first information, wherein the first information is used for a second terminal to perform an operation related to SL transmission in a channel occupation time COT initiated by the first terminal; and sending the first information to the second terminal. Because the first terminal sends the first information to the second terminal, the second terminal performs the operation related to the SL transmission in the channel occupation time COT initiated by the first terminal according to the first information, rather than blindly performing the operation related to the SL transmission in the channel occupation time COT initiated by the first terminal, and therefore the sharing effectiveness of the COT initiated by the first terminal can be improved.

Description

Method and device for sharing time occupied by channel of sidelink and transmitting sidelink

Technical Field

The application belongs to the technical field of communication, and particularly relates to a method and a device for sharing time occupied by a channel of a secondary link and transmitting the secondary link.

Background

A Sidelink (SL), also called a side link or a side link, is used for directly transmitting data between terminal equipments (UEs) without passing through a network device. In future communication systems, shared spectrum such as unlicensed band (unlicensed band) may be used as a supplement to licensed band (licensed band) to help operators expand services. The channel occupation time (Channel Occupancy Time, COT) can be shared between UEs having TX-RX burst characteristics when the SL transmission is performed in an unlicensed/shared band.

In a related communication system, a UE determines SL resources through two modes, one is a scheduled resource allocation (Scheduled resource allocation) mode, referred to as mode1 (mode 1), and the SL resources are allocated to the UE by a network device; the other is an autonomous resource selection (autonomous resource selection) mode, called mode2 (mode 2), with SL resources being selected autonomously by the UE. When the UE selects the SL resources through mode2, the problem that the SL resources selected between the UEs are in conflict, and the remaining COTs are preempted by other UEs to interrupt the COTs and reduce the sharing effectiveness easily occurs, so how to improve the effectiveness of the COTs sharing is a technical problem to be solved.

Disclosure of Invention

The embodiment of the application provides a method and a device for sharing time occupied by a channel of a sidelink and transmitting the sidelink, which can solve the problem of poor COT sharing effectiveness.

In a first aspect, a method for sharing time occupied by a channel of a sidelink is provided, which is executed by a first terminal, and the method includes:

determining first information, wherein the first information is used for a second terminal to perform an operation related to SL transmission in a channel occupation time COT initiated by the first terminal;

and sending the first information to the second terminal.

In a second aspect, there is provided a channel occupancy time sharing apparatus of a sidelink, the apparatus comprising:

a determining module, configured to determine first information, where the first information is used for a second terminal to perform an operation related to SL transmission within a channel occupation time COT initiated by the first terminal;

and the sending module is used for sending the first information to the second terminal.

In a third aspect, there is provided a sidelink transmission method performed by a second terminal, the method comprising:

receiving first information sent by a first terminal, wherein the first information is used for the second terminal to perform operations related to SL transmission in a channel occupation time COT initiated by the first terminal;

And carrying out the operation related to SL transmission according to the first information.

In a fourth aspect, there is provided a sidelink transmission apparatus, the apparatus comprising:

the receiving module is used for receiving first information sent by a first terminal, wherein the first information is used for the second terminal to perform an operation related to SL transmission in a channel occupation time COT initiated by the first terminal;

and the execution module is used for carrying out the operation related to SL transmission according to the first information.

In a fifth aspect, there is provided a terminal comprising a processor and a memory storing a program or instructions executable on the processor, which when executed by the processor, implement the steps of the method as described in the first aspect.

In a sixth aspect, there is provided a terminal comprising a processor and a memory storing a program or instructions executable on the processor, which when executed by the processor, implement the steps of the method according to the third aspect.

In a seventh aspect, a first terminal is provided, including a processor and a communication interface, where the processor is configured to determine first information, where the first information is used for the second terminal to perform an operation related to SL transmission within a channel occupation time COT initiated by the first terminal, and the communication interface is configured to send the first information to the second terminal.

In an eighth aspect, a second terminal is provided, including a processor and a communication interface, where the communication interface is configured to receive first information sent by a first terminal, where the first information is used for the second terminal to perform an operation related to SL transmission within a channel occupation time COT initiated by the first terminal, and the processor is configured to perform the operation related to SL transmission according to the first information.

In a ninth aspect, there is provided a readable storage medium having stored thereon a program or instructions which when executed by a processor, performs the steps of the method according to the first aspect or performs the steps of the method according to the third aspect.

In a tenth aspect, there is provided a chip comprising a processor and a communication interface, the communication interface and the processor being coupled, the processor being for running a program or instructions to implement the method according to the first aspect or to implement the method according to the third aspect.

In an eleventh aspect, there is provided a computer program/program product stored in a storage medium, the computer program/program product being executed by at least one processor to implement the steps of the channel occupancy time sharing method of a sidelink as described in the first aspect.

In a twelfth aspect, there is provided a computer program/program product stored in a storage medium, the computer program/program product being executed by at least one processor to implement the steps of the sidelink transmission method as described in the third aspect.

In the embodiment of the present application, the first terminal may send the first information to the second terminal, so that the second terminal performs an operation related to SL transmission within the channel occupation time COT initiated by the first terminal according to the first information, instead of blindly performing an operation related to SL transmission within the channel occupation time COT initiated by the first terminal, so that the sharing effectiveness of the COT initiated by the first terminal can be improved.

Drawings

Fig. 1 is a block diagram of a wireless communication system provided in an embodiment of the present application.

Fig. 2 is a flow chart of a method for sharing time occupied by a channel of a sidelink according to an embodiment of the present application.

Fig. 3 is one of schematic diagrams of a first terminal partitioning a first resource to a second terminal in a COT initiated by the first terminal according to an embodiment of the present application.

Fig. 4 is one of schematic diagrams of a first terminal partitioning a first resource to a second terminal in a COT initiated by the first terminal according to an embodiment of the present application.

Fig. 5 is one of the mapping relationships between the first resource and the second terminal determined by the first terminal provided in the embodiment of the present application.

Fig. 6 is a second mapping relationship between a first resource and a second terminal determined by a first terminal according to an embodiment of the present application.

Fig. 7 is a third mapping relationship between the first resource and the second terminal determined by the first terminal according to the embodiment of the present application.

Fig. 8 is a fourth mapping relationship between a first resource and a second terminal determined by a first terminal according to an embodiment of the present application.

Fig. 9 is a fifth mapping relationship between a first resource and a second terminal determined by a first terminal according to an embodiment of the present application.

Fig. 10 is a sixth mapping relationship between a first resource and a second terminal determined by a first terminal according to an embodiment of the present application.

Fig. 11 is a seventh mapping relationship between the first resource and the second terminal determined by the first terminal according to the embodiment of the present application.

Fig. 12 is an eighth mapping relationship between a first resource and a second terminal determined by a first terminal according to an embodiment of the present application.

Fig. 13 is a schematic structural diagram of a time sharing device for channel occupation of a sidelink according to an embodiment of the present application.

Fig. 14 is a flow chart of a method for transmitting a sidelink according to an embodiment of the present application.

Fig. 15 is a schematic structural diagram of a sidelink transmission device according to an embodiment of the present application.

Fig. 16 is a schematic structural view of a communication device of the present application.

Fig. 17 is a schematic diagram of a hardware structure of a terminal according to an embodiment of the present application.

Detailed Description

Technical solutions in the embodiments of the present application will be clearly described below with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application are within the scope of the protection of the present application.

The terms first, second and the like in the description and in the claims, are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the terms so used are interchangeable under appropriate circumstances such that the embodiments of the application are capable of operation in sequences other than those illustrated or otherwise described herein, and that the terms "first" and "second" are generally intended to be used in a generic sense, not to be limited to the number of objects, for example, the first information may be one or more. Furthermore, in the description and claims, "and/or" means at least one of the connected objects, and the character "/" generally means a relationship in which the associated object is an "or" before and after.

It is noted that the techniques described in embodiments of the present application are not limited to long term evolution (Long Term Evolution, LTE)/LTE evolution (LTE-Advanced, LTE-a) systems, but may also be used in other wireless communication systems, such as code division multiple access (Code Division Multiple Access, CDMA), time division multiple access (Time Division Multiple Access, TDMA), frequency division multiple access (Frequency Division Multiple Access, FDMA), orthogonal frequency division multiple access (Orthogonal Frequency Division Multiple Access, OFDMA), single carrier frequency division multiple access (Single-carrier Frequency Division Multiple Access, SC-FDMA), and other systems. The terms "system" and "network" in embodiments of the present application are often used interchangeably, and the techniques described may be used for both the above-mentioned systems and radio technologies, as well as other systems and radio technologies. The following description is given by way of exampleThe purpose describes a New air interface (NR) system and NR terminology is used in much of the description below, but these techniques are also applicable to applications other than NR system applications, such as generation 6 (6) ^th Generation, 6G) communication system.

Fig. 1 shows a block diagram of a wireless communication system to which embodiments of the present application are applicable. The wireless communication system includes a terminal 11 and a network device 12. The terminal 11 may be a mobile phone, a tablet (Tablet Personal Computer), a Laptop (Laptop Computer) or a terminal-side Device called a notebook, a personal digital assistant (Personal Digital Assistant, PDA), a palm top, a netbook, an ultra-mobile personal Computer (ultra-mobile personal Computer, UMPC), a mobile internet appliance (Mobile Internet Device, MID), an augmented reality (augmented reality, AR)/Virtual Reality (VR) Device, a robot, a Wearable Device (weather Device), a vehicle-mounted Device (VUE), a pedestrian terminal (PUE), a smart home (home Device with a wireless communication function, such as a refrigerator, a television, a washing machine, or a furniture), a game machine, a personal Computer (personal Computer, PC), a teller machine, or a self-service machine, and the Wearable Device includes: intelligent wrist-watch, intelligent bracelet, intelligent earphone, intelligent glasses, intelligent ornament (intelligent bracelet, intelligent ring, intelligent necklace, intelligent anklet, intelligent foot chain etc.), intelligent wrist strap, intelligent clothing etc.. Note that, the specific type of the terminal 11 is not limited in the embodiment of the present application. The network-side device 12 may comprise an access network device or a core network device, wherein the access network device 12 may also be referred to as a radio access network device, a radio access network (Radio Access Network, RAN), a radio access network function or a radio access network element. Access network device 12 may include a base station, a WLAN access point, a WiFi node, or the like, which may be referred to as a node B, an evolved node B (eNB), an access point, a base transceiver station (Base Transceiver Station, BTS), a radio base station, a radio transceiver, a basic service set (Basic Service Set, BSS), an extended service set (Extended Service Set, ESS), a home node B, a home evolved node B, a transmission and reception point (Transmitting Receiving Point, TRP), or some other suitable terminology in the art, and the base station is not limited to a particular technical vocabulary so long as the same technical effect is achieved, and it should be noted that in the embodiments of the present application, only a base station in an NR system is described as an example, and the specific type of the base station is not limited.

The following presents some basic concepts to which embodiments of the present application relate.

Sidelink (SL), also known as a side link, side link or side link. As shown in fig. 1, the side link is used for directly transmitting data between the terminal devices 11 without passing through the network side device 12, and the sub link transmission is relative to the main link transmission, and the main link transmission includes an uplink transmission initiated by the terminal device 11 to the network side device 12 and a downlink transmission initiated by the network side device 12 to the terminal device 11.

LTE sidelink is broadcast based and may be used to support basic security class communications for internet of vehicles (vehicle to everything, V2X), but is not applicable to other higher V2X services. The 5G NR (New Radio) system supports more advanced sidelink transmission designs, such as unicast, multicast or multicast, etc., so that more comprehensive service types can be supported. Currently, NR sidelink includes the following channels:

PSCCH (physical sidelink control channel )

PSSCH (physical sidelink shared channel physical side Link shared channel)

PSBCH (physical sidelink broadcast channel )

PSFCH (physical sidelink feedback channel )

Wherein, PSSCH uses sub-channel as unit to allocate resource, and uses continuous resource allocation mode in frequency domain. The time domain resource of the PSCCH is the number of symbols configured by a high layer, the frequency domain size is a parameter configured by the high layer, the frequency domain resource limit of the PSCCH is less than or equal to the size of one sub-channel, and the PSCCH is positioned in the range of the lowest sub-channel of the PSSCH.

Multicast communication of the sidelink refers to that one UE transmits information to other UEs in the group. The number of UEs (group size) in a UE group and the ID of the UE in the UE group (intra-group ID/Member-ID/in-group ID) are notified to the UE by a higher layer for the source/destination ID (source ID/destination ID) of the message before the physical layer transmits the information.

NR V2X defines two resource allocation modes, one is mode1, which schedules resources for the base station; the other is mode2, the UE itself decides what resources to use for transmission. The resource information may be a broadcast message from the base station or preconfigured information at this time. The UE may be mode1 and/or mode2 if operating within the range of the base station and having an RRC connection with the base station, and may only operate in mode2 if operating within the range of the base station but not having an RRC connection with the base station. If the UE is out of range of the base station, then it can only operate in mode2 and V2X transmission is performed according to pre-configured information.

For mode 2, the specific operation is as follows: 1) After the resource selection is triggered, the TX UE first determines a resource selection window, where the lower boundary of the resource selection window is at T1 time after the triggering of the resource selection, and the upper boundary of the resource selection is at T2 time after the triggering, where T2 is a value selected by the UE implementation in PDB (packet delay budget) of its TB transmission, and T2 is not earlier than T1. 2) The UE needs to determine an alternative set of resources (candidate resource set) for the resource selection before the resource selection, and the reference signal received power (reference signal received power, RSRP) measured on the resources within the resource selection window is compared to the corresponding RSRP threshold, and if the RSRP is lower than the RSRP threshold, the resources may be included in the alternative set of resources. 3) After the resource set is determined, the UE randomly selects transmission resources among the candidate resource sets. In addition, the UE may reserve transmission resources for the next transmission at this time of transmission. Furthermore, NR V2X supports a chained resource reservation manner, that is, one SCI may reserve current resources, at most two resources may be reserved additionally, and in the next resource, two reserved resources may be indicated. Within the selection window, resources may be reserved continuously in a dynamic reservation manner.

The following describes in detail, with reference to the accompanying drawings, a method for sharing time occupied by a channel of a sidelink and a method for transmitting a sidelink provided in the embodiments of the present application through some embodiments and application scenarios thereof.

As shown in fig. 2, an embodiment of the present application provides a method for sharing time occupied by a channel of a sidelink, which may be applied to a first terminal, and the method may include:

step 201, determining first information, where the first information is used for a second terminal to perform an operation related to SL transmission in a channel occupation time (Channel Occupancy Time, COT) initiated by the first terminal.

And 202, transmitting the first information to the second terminal.

The second terminal may include, but is not limited to, at least one of:

(1) One or more terminals belonging to the same multicast as the first terminal;

(2) One or more terminals detected by the first terminal;

(3) One or more terminals transmitting broadcast messages;

(4) One or more terminals transmitting unicast messages to the first terminal.

The operations related to SL transmission described above may include, but are not limited to, one of SL transmission, SL resource determination, and SL channel access.

The first information may include, but is not limited to, at least one of first indication information and COT related information. The first indication information includes information about a first resource, where the first resource is a SL resource recommended by the first terminal to the second terminal to perform an operation related to SL transmission in the COT. The COT-related information may include, but is not limited to, at least one of COT information and remaining COT (remaining COT) information, wherein the COT information includes at least one of a duration of the COT and a frequency domain bandwidth of the COT; the remaining COT information includes at least one of a duration of the remaining COT and a frequency domain bandwidth of the remaining COT.

It may be understood that, in the case that the first information includes the first indication information, the second terminal may perform an operation related to SL transmission according to the first resource indicated in the first indication information after receiving the first information; when the first information includes the COT related information, the second terminal may perform a task related to SL transmission according to the COT related information after receiving the first information; when the first information includes the first indication information and the COT related information, the second terminal may perform a SL transmission related operation according to at least one of the first indication information and the COT related information after receiving the first information.

As can be seen, in the channel occupation time sharing method for a sidelink provided in the embodiment of the present application, since the first terminal sends the first information to the second terminal, the second terminal performs an operation related to SL transmission within the channel occupation time COT initiated by the first terminal according to the first information, instead of blindly performing an operation related to SL transmission within the channel occupation time COT initiated by the first terminal, so that the sharing effectiveness of the COT initiated by the first terminal can be improved.

Optionally, in the case that the first information includes the first indication information, the step 201 may specifically include: a first resource within the COT is determined.

For example, the first terminal may divide the first resource within the COT according to a first parameter. Wherein the first parameter comprises at least one of:

(1) A length of the first resource, the length of the first resource including at least one of a time domain length of the first resource and a frequency domain length of the first resource;

(2) The number of first resources.

Optionally, in the case that the first parameter includes the length of the first resource, before step 201, the method for sharing the time occupied by the channel of the sidelink provided in the embodiment of the present application may further include: and determining the length of the first resource according to the first preset content.

Wherein the first preset content comprises at least one of the following:

1) And the COT related information.

For example, the time domain length of the COT or the time domain length of the remaining COT is determined as the time domain length of the first resource, and/or a preset frequency domain length is determined as the frequency domain length of the first resource, that is, the plurality of terminals within the COT are frequency division multiplexed (Frequency Division Multiplex, FDM). Alternatively, the time domain length of the first resource is determined as at least one time slot, and/or one of the frequency domain bandwidth of the COT, the frequency domain width of the remaining COT, and the preset frequency domain length is determined as the frequency domain length of the first resource, it is understood that when the frequency domain bandwidth of the COT or the frequency domain width of the remaining COT is determined as the frequency domain length of the first resource, a plurality of terminals within the COT are time division multiplexed (Time Division Multiplex, TDM).

The preset frequency domain length comprises the following steps: at least one listen before talk, LBT, bandwidth, at least one subchannel, or at least one interlace.

2) And the second terminal reserves the information of the resources in the COT.

For example, if the first terminal detects that UE1 reserves one time slot in the COT and UE2 reserves two time slots in the COT, UE1 and UE2 may share the COT initiated by the first terminal, and the first terminal divides the first resource of one time slot for UE1 and divides the first resource of two time slots for UE 2.

3) And the second parameter comprises at least one of the number of terminals in the multicast to which the first terminal belongs, the data amount to be received by the first terminal, the information amount from the multicast to which the first terminal belongs and the request from the multicast to which the first terminal belongs, which are received by the first terminal.

For example, according to the received request of the UE in the multicast to which the first terminal belongs, the first terminal may include the data amount to be transmitted and at least one of the parameters such as the size of the resource to be transmitted, the time domain length, the frequency domain length, the time domain position, the frequency domain position, the number of resources, etc., and then the time domain length or the frequency domain length of the first resource corresponding to the UE in the group may be determined according to these parameters.

4) Provision of a protocol.

5) At least one of network side equipment pre-configuration, network side equipment indication, first terminal configuration, first terminal pre-configuration and second terminal indication.

Optionally, in the case that the first parameter includes the number of first resources, before step 201, the method for sharing time occupied by a channel of a sidelink provided in the embodiment of the present application may further include: and determining the number of the first resources according to the second preset content.

Wherein the second preset content comprises at least one of the following:

1) The number of the second terminals or the number of the terminals in the multicast to which the first terminal belongs.

For example, the number of the first resources is the number of the second terminals or the number of UEs in the multicast to which the first terminals belong; or the number of the first resources is an integer multiple of the number of the second terminals or an integer multiple of the number of the UEs in the multicast to which the first terminals belong (one UE maps a plurality of first resources); or the number of the first resources is an upward integer value of N/X (X UEs map one resource), where N is the number of the second terminals or the number of UEs in the multicast to which the first terminal belongs.

2) And the COT related information.

For example, the number of first resources is the number of COT or time slots of the remaining COT (one time slot is one resource); or, the number of the first resources is COT or the up-rounded value of the number of time slots of the residual COT/X (X time slots are one resource); or the number of the first resources is the number of LBT bandwidths of COT or residual COT; or the number of the first resources is the COT or the LBT bandwidth number/X of the residual COT; or the number of the first resources is the number of COT or the number of the sub-channels of the residual COT; or the number of the first resources is COT or the upward integer value of the number/X of the subchannels of the residual COT; alternatively, the number of the first resources is the number of COT or the interleaving (interleaving) of the remaining COT; alternatively, the number of first resources is the COT or the upper integer of the number of interlaces of the remaining COT/Y. Wherein X, Y is any positive integer.

3) And second information, wherein the second information comprises resource reservation information of one or more terminals detected by the first terminal in the COT, or the second information comprises resource request information of one or more terminals detected by the first terminal in the COT, and the one or more terminals detected by the first terminal comprise the second terminal.

For example, the first terminal detects that UE1 reserves one slot in the COT, UE2 reserves two slots in the COT, and if UE1 and UE2 can share the COT of the first terminal, the first terminal divides two first resources to UE1 and UE2 in the COT. Alternatively, for example, the first terminal detects that UE1 requests one slot, UE2 requests two slots, UE1 and UE2 may share the COT of the first terminal, and the first terminal may divide two first resources to UE1 and UE2 within the COT.

4) At least one of network side equipment pre-configuration, network side equipment indication, first terminal configuration, first terminal pre-configuration and second terminal indication.

The following describes, by means of an embodiment, a case where the first terminal divides the first resource to the second terminal within the COT according to the first parameter.

Embodiment one

Assume that UE a initiates (initiated) COT after successful channel access and shares the COT to other terminals in the multicast to which UE a belongs: the case where UE B, UE C and UE D are divided by UE a for the remaining (remaining) COT into the first resources may be one or more of the following cases:

1) The UE a may determine at least one of a time domain length and a frequency domain length of the first resource according to the COT information or the remaining COT information.

For example, as shown in fig. 3, the time domain length of the first resource corresponding to the second terminal may be one or more time slots, for example, the time domain lengths of the first resources corresponding to UE B, UE C, and UE D are 1 time slot, 2 time slots, and 3 time slots, respectively; the frequency domain length of the first resource corresponding to the second terminal is the frequency domain width of the remaining COT, for example, the frequency domain length of the first resource corresponding to the UE B, the UE C and the UE D is the frequency domain width of the remaining COT. It can be seen that in this division, the terminals within the remaining COT are Time Division Multiplexed (TDM).

Alternatively, as shown in fig. 4, the time domain length of the first resource corresponding to the second terminal may be the time domain length of the COT or the time domain length of the remaining COT, for example, the time domain length of the first resource corresponding to UE B, UE C, and UE D is the time domain length of the remaining COT; the frequency domain length of the first resource corresponding to the second terminal is a preset frequency domain length, wherein the preset frequency domain length is one of at least one Listen Before Talk (LBT) bandwidth, at least one sub-channel or at least one interlace, and the frequency domain length of the first resource corresponding to the UE B, the UE C and the UE D is 1 LBT bandwidth, 2 LBT bandwidths and 2 LBT bandwidths respectively. It will be readily seen that in the partitioning example shown in fig. 4, the plurality of terminals within the remaining COT are Frequency Division Multiplexed (FDM).

2) The UE a may determine the number of first resources according to the number of UEs in the multicast to which the UE a itself belongs. For example, the number of the first resources corresponding to the second terminal is 3, and UE B, UE C, and UE D map one first resource respectively; or the number of the first resources corresponding to the second terminal is 6, and UE B, UE C and UE D respectively map 2 first resources; or the number of the first resources corresponding to the second terminal is 1, and the UE B, the UE C and the UE D map 1 identical first resource.

3) The UE a may determine the number of first resources according to the COT information or the remaining COT information. For example, the number of the first resources is 8 (i.e., the first resources are one slot), or the number of the first resources is 8/2=4 (i.e., the first resources are two slots), etc. In particular, the number of the first resources may be determined by a/b rounding up, where a represents a preset target number in the COT or in the remaining COT, and b represents a preset target number mapped by the first resource. It should be noted that, when the a/b rounding is performed, if a/b surplus c exists, one first resource is allowed to map at least one of c preset targets, where the preset targets include at least one of a terminal, a slot, an LBT bandwidth, and a subchannel.

4) The UE a may determine the length of the first resource according to the detected resource reservation information of the second terminal. For example, UE a detects that UE B reserves one time slot in the COT initiated by UE a, UE D reserves two time slots in the COT initiated by UE a, and if UE B and UE D can share the COT initiated by UE a, UE a divides the first resource of one time slot for UE B and divides the first resource of two time slots for UE D.

5) The UE a may determine the number of first resources according to the detected resource reservation information of the second terminal. For example, UE a detects that UE B reserves one time slot in the COT initiated by UE a, UE D reserves two time slots in the COT initiated by UE a, and if UE B and UE D can share the COT of UE a, UE a divides two first resources to UE B and UE D, respectively, where the first resource of UE B occupies one time slot and the first resource of UE D occupies two time slots.

Optionally, in another embodiment, the step 202 may include: and determining the mapping relation between the first resource and the second terminal in the COT.

In one example, the mapping relationship between the first resource and the second terminal may be determined according to third information and the identifier of the second terminal, where the identifier of the second terminal may be at least one of a number of the second terminal in the multicast to which the second terminal belongs and a source ID of the second terminal.

Wherein the third information includes at least one of:

(1) At least one of a time domain location and a frequency domain location of the first resource. For example, the first resource is mapped with the second terminal in a time domain increasing or decreasing manner, and/or the first resource is mapped with the second terminal in a frequency domain increasing or decreasing manner, where the mapping may be performed by increasing or decreasing the time domain first and then the frequency domain, or by increasing or decreasing the frequency domain first and then the time domain.

(2) At least one of a highest interleaving index and a lowest interleaving index of the first resource. For example, the first resource is mapped with the second terminal in such a manner that an interlace index (interlace index) increases or decreases.

(3) And the index number of the first resource. For example, the first resource may be numbered according to the ascending (descending) of the time domain and the ascending (descending) of the frequency domain, and the sequence of the time domain and the frequency domain (or the frequency domain and the time domain), and then the number of the first resource is corresponding to the identifier of the second terminal, so as to obtain the mapping relationship between the first resource and the second terminal.

(4) And the second terminal reserves the information of the resources in the COT. For example, at least one of a reserved resource time domain location and a reserved resource frequency domain location.

(5) And detecting the time sequence of the resource reservation information of the second terminal in the COT.

(6) At least one of a transmission resource size and a location of the first terminal.

(7) The physical sidelink feedback channel PSFCH or the transmission position or symbol of the designated PSFCH within a first time range, where the first time range is at least one of duration of the COT or duration of remaining COT, and/or a preset value agreed by a protocol, a value configured by a network side device, a value indicated by a network side device, a value configured by the first terminal, and a value indicated by the second terminal, which are described in detail in embodiment three and fig. 12 below.

(8) The hash algorithm may, for example, calculate a hash value of the second terminal, modulo the hash value of the second terminal to the number of the first resources to obtain a modulus value, and then map the modulus value to the first resources with corresponding numbers.

(9) The method comprises the steps of pre-defining a protocol, pre-configuring network side equipment, indicating network side equipment, pre-configuring the first terminal, configuring the first terminal and indicating the second terminal.

The following describes a case where the first terminal determines the mapping relationship between the first resource and the second terminal through the second embodiment.

Second embodiment

Assume that UE a (first terminal) initiates a COT after successful channel access, and shares the COT to other terminals (second terminals) in the multicast to which UE a belongs: UE B, UE C and UE D, the manner in which UE a determines the mapping relationship between the first resource and UE B, UE C and UE D may be one of the following manners:

1) Assume that the numbers (membrane IDs) of UE a, UE B, UE C, and UE D in the multicast to which they belong are respectively: the number of the first resources in the remaining COTs of UE a is 8, and then one first resource in the remaining COTs may be mapped to the terminals UE B, UE C, and UE D in sequence in the ascending order of the time domain (it should be noted that the order of the terminals in the group is not limited here, one possible way is to determine the order of the terminals in the group according to the member ID, for example, the order of the terminals in the group is determined in the ascending or descending order of the member ID, another possible way is a random order, and the same applies to the description below), and the mapping result is shown in fig. 5.

2) Assume that the numbers (membrane IDs) of UE a, UE B, UE C, and UE D in the multicast to which they belong are respectively: the number of the first resources in the remaining COTs of UE a is 2, and thus one first resource in the remaining COTs may be mapped to UE B and UE C in sequence in ascending order of time domain, and then one first resource in the remaining COTs may be mapped to UE D, and the mapping result is shown in fig. 6.

3) Assume that the numbers (membrane IDs) of UE a, UE B, UE C, and UE D in the multicast to which they belong are respectively: #1, #2, #3, and # 4), one of the first resources in the remaining COTs may be mapped to the terminals UE B, UE C, UE D in sequence in order of increasing interleaving index (interlace index) in the frequency domain after the frequency domain (again, the order of the terminals in the group is not limited here, one possible way is to determine the order of the terminals in the group according to the member ID, for example, the order of the terminals in the group is determined in order of increasing or decreasing member ID, another possible way is random order), and the mapping result is shown in fig. 7.

4) Assume that the numbers (membrane IDs) of UE a, UE B, UE C, and UE D in the multicast to which they belong are respectively: the number of the first resources in the remaining COTs of ue a is 8, and the first resources may be numbered (first resource index), for example, the first resources are numbered in the order of increasing time domain, the index is 1 to 8, or the first resources may be numbered in the order of increasing time domain, for example, the index is 1 to 4,1 to 4; or, according to the increment or decrement of the time domain, the increment or decrement of the frequency domain, the direction of the time domain before the frequency domain or the direction of the time domain after the frequency domain, the first resource index is determined.

Where the first resource index is numbered in a time domain increment or decrement, a frequency domain increment or decrement, a time domain first to frequency domain first to time domain direction, the order of the second terminal is not limited, one possible way is to determine the order of the second terminal according to the member ID or the source ID, for example, the order of the second terminal is determined according to the member ID or the ID increment or decrement, and another possible way is a random order.

In addition, the first resource index may be determined according to the identity (such as the module ID or the source ID) of the second terminal, for example, the first resource index may be one of the following cases:

(1) first resource index=membrane ID of the second terminal.

(2) First resource index = source ID of the second terminal.

(3) First resource index=number ID mod of the second terminal (number of first resources-n) +x, where n and x are arbitrary integers.

(4) First resource index=source ID mod of the second terminal (number of first resources-nn) +xx, where nn and xx are arbitrary integers.

(5) First resource index=membrane id+p of the second terminal (number of UEs in the group-m) +y, where p, m, and y are arbitrary integers.

(6) First resource index = source ID of second terminal + q (number of UEs in group-mm) +z, where q, mm and z are arbitrary integers.

It should be noted that, when the first resource index is determined according to the above formula, the first resource index may be default according to the number of the first resources.

Since the first resource index is determined according to the identifier (such as the module ID or the source ID) of the second terminal when the first resource index is determined, the mapping relationship between the first resource and the second terminal is determined after the first resource index is determined. For example, the mapping relationships between the UE a, UE B, UE C, and UE D and the first resource determined according to the (5) th aspect are shown in fig. 8, and the mapping relationships between the UE a, UE B, UE C, and UE D and the first resource determined according to the (3) th aspect are shown in fig. 9.

Accordingly, after determining the first resource index in the above manner, the second terminal may determine the corresponding first resource according to the identifier (such as the module ID or the source ID) of the second terminal. It can be appreciated that the process of determining the first resource corresponding to the second terminal according to the identifier of the second terminal is the reverse process of determining the first resource index.

For example, corresponding to the above several ways of determining the first resource index, the way of determining the first resource corresponding to the second terminal is as follows:

(1) second terminal's membrane id=first resource index

(2) Source ID of second terminal = first resource index

(3) The member ID of the second terminal=the first resource index+h (number of first resources-n) +x, where h, n and x are arbitrary integers.

(4) Source ID of the second terminal=first resource index+j (number of first resources-nn) +xx, where j, n and x are arbitrary integers.

(5) The module ID of the second terminal=the first resource index mod (number of UEs in the group-m) +y, where m and y are arbitrary integers.

(6) Source ID of the second terminal = first resource index mod (number of UEs in group-mm) +z, where mm and z are arbitrary integers.

5) Assuming that UE a detects that UE B reserves a slot n+2 in the COT and UE D reserves two slots n+3 in the COT, if UE B and UE D can share the COT of UE a, UE a determines a mapping relationship between the first resource and UE B and UE D according to the detected resource reservation information (time domain position of reserved resource) of UE B and UE D, and the mapping result is shown in fig. 10.

6) Assuming that UE a detects that UE B reserves a time slot in COT at slot n-5 and detects that UE D reserves two time slots in COT at slot n-3, if UE B and UE D can share COT of UE a, UE a determines a mapping relationship between the first resource and UE B and UE D according to a time sequence of detecting resource reservation information of UE B and UE D, and a mapping result is shown in fig. 11.

As previously described, the first information includes, but is not limited to, at least one of first indication information and COT related information. The first indication information includes information about a first resource, where the first resource is a SL resource recommended by the first terminal to the second terminal to perform an operation related to SL transmission in the COT. The COT-related information may include, but is not limited to, at least one of COT information and remaining COT (remaining COT) information, wherein the COT information includes at least one of a duration of the COT and a frequency domain bandwidth of the COT; the remaining COT information includes at least one of a duration of the remaining COT and a frequency domain bandwidth of the remaining COT.

Embodiment III (the third information includes the PSFCH or the transmission position and symbol of the designated PSFCH within the first time range)

Assume that UE a initiates a COT after successful channel access and shares the COT to other terminals in the group: UE B, UE C, UE D, wherein UE B, UE C, and UE D may send multicast PSFCHs. When the COT is relatively long, the COT may cover a plurality of PSFCH Occasins (POs), for example, assuming that the cot=12 slots, and the period of the PSFCH is 4, there are three POs in the COT. In this case, UE a may determine the resources of other terminals in the group to transmit the PSFCH according to the transmission resource size or location of the first terminal and the POs in the COT or the remaining COT.

For example, UE a wants to send data using the first 10 slots in the self-initiated COT, then other UEs cannot feed back the PSFCH on the POs that overlaps with the 10 slots (otherwise would cause UE a to end the transmission and receive the PSFCH), so UE a determines the resource location of the PSFCH sent by other UEs in the group to be the third PO (i.e., the PO that does not overlap with the transmission resources of UE a), as shown in fig. 12, UE a may determine the starting resource location of the PSFCH sent by other UEs in the group to be the 3 rd slot in the third PO (the 11 th slot in the COT).

In particular, the UE a may send first indication information to other UEs, indicating that other UEs in the group send resources of the PSFCH on a PO within the shared COT that does not overlap with the transmission resources of the UE a.

In a specific implementation, the first indication information may include at least one of an identifier of the second terminal, a time domain location of the first resource, a frequency domain location of the first resource, an index number of the first resource, and fourth information. Wherein the fourth information includes at least one of the following indication information of one of the first resource, the COT, and a SL resource allowed to be shared:

1) A cyclic prefix extension (Circular prefix extension, CPE), which is a mobile signal access device that receives mobile signals and forwards the mobile signals as wireless WIFI signals, the CPE can convert high-speed 4G/5G signals into WIFI signals;

2) A transmission start position or a transmission start symbol;

3) The number of ports of the physical sidelink shared channel demodulation reference signal (PSSCH DMRS);

4) Coding information, such as modulation and coding scheme (Modulation and coding scheme, MCS), MCS table indication, etc.;

5) Hybrid automatic repeat request (Hybrid Automatic Repeat Request, HARQ) indication information;

6) Redundancy versions (Redundant version, RV);

7) Initially transmitting indication information;

8) Retransmitting the indication information;

9) A target ID;

10 A propagation type indication information, the propagation type including one of unicast, multicast, and broadcast;

11 Transmitting content indication information.

Further, the first indication information may be carried by the PSSCH or PSCCH.

According to the above description, it can be known from the foregoing description that, in the channel occupation time sharing method of the sidelink provided by the embodiment of the present application, after the first terminal initiates the COT, the first terminal sends the first information to the second terminal, so that the second terminal performs the operation related to SL transmission in the COT according to the first information, instead of blindly performing the operation related to SL transmission in the channel occupation time COT initiated by the first terminal, thereby avoiding the problems that the SL resources selected between UEs have collision, and the remaining COT is preempted by other UEs to interrupt the COT, and so on, and improving the sharing effectiveness of the COT initiated by the first terminal.

According to the channel occupation time sharing method for the auxiliary link provided by the embodiment of the application, the execution body can be a channel occupation time sharing device for the auxiliary link. In the embodiment of the present application, an example of a method for performing channel occupation time sharing of a secondary link by using a channel occupation time sharing device of a secondary link is described.

As shown in fig. 13, an apparatus 1300 of a time sharing apparatus for channel occupation of a sidelink according to an embodiment of the present application may include: a determination module 1301 and a transmission module 1302.

A determining module 1301, configured to determine first information, where the first information is used for a second terminal to perform an operation related to SL transmission in a COT initiated by the first terminal.

A sending module 1302, configured to send the first information to the second terminal.

The second terminal may include, but is not limited to, at least one of:

(2) One or more terminals detected by the first terminal;

(3) One or more terminals transmitting broadcast messages;

(4) One or more terminals transmitting unicast messages to the first terminal.

Alternatively, as shown in fig. 15, in the case where the first information includes the first indication information, the determining module 1301 is specifically configured to: a first resource within the COT is determined.

(2) The number of first resources.

Alternatively, where the first parameter includes a length of the first resource, the determining module 1301 may determine the length of the first resource according to the first preset content. Wherein the first preset content comprises at least one of the following:

1) And the COT related information.

4) Provision of a protocol.

Alternatively, in the case where the first parameter includes the number of first resources, the determining module 1301 may determine the number of first resources according to the second preset content. Wherein the second preset content comprises at least one of the following:

2) And the COT related information.

Optionally, in another embodiment, the determining module 1301 is specifically configured to: and determining the mapping relation between the first resource and the second terminal in the COT.

Wherein the third information includes at least one of:

(1) At least one of a time domain location and a frequency domain location of the first resource.

(2) At least one of a highest interleaving index and a lowest interleaving index of the first resource.

(3) And the index number of the first resource.

(4) And the second terminal reserves the information of the resources in the COT.

(7) The physical sidelink feedback channel PSFCH or the designated PSFCH in a first time range, wherein the first time range is at least one of a preset value agreed by a protocol, a value configured by network side equipment, a value indicated by network side equipment, a value configured by the first terminal and a value indicated by the second terminal, and/or the duration of the COT or the duration of the residual COT.

(8) Hash algorithm.

Optionally, the first indication information may specifically include at least one of an identification of the second terminal, a time domain location of the first resource, a frequency domain location of the first resource, an index number of the first resource, and fourth information. Wherein the fourth information includes at least one of the following indication information of one of the first resource, the COT, and a SL resource allowed to be shared:

1)CPE；

2) A transmission start position or a transmission start symbol;

3) PSSCH DMRS port number;

4) Coding information, such as MCS, MCS table indication, etc.;

5) HARQ indication information;

6)RV；

7) Initially transmitting indication information;

8) Retransmitting the indication information;

9) A target ID;

11 Transmitting content indication information.

Further, the first indication information may be carried by the PSSCH or PSCCH.

The device 1300 for sharing time occupied by a channel of a sidelink provided in the embodiment of the present application can implement each process implemented by the method embodiment of fig. 2, and achieve the same technical effects, and is not described herein again for avoiding repetition.

The embodiment of the application also provides a method for transmitting the secondary link applied to the second terminal, which is described below.

As shown in fig. 14, the embodiment of the present application further provides a sidelink transmission method applied to a second terminal, which may be applied to the second terminal, where the method may include:

step 1401, receiving first information sent by a first terminal, where the first information is used for the second terminal to perform an operation related to SL transmission within a channel occupation time COT initiated by the first terminal.

Step 1402, performing the operation related to SL transmission according to the first information.

The operations related to SL transmission described above may include, but are not limited to, one of SL transmission, SL resource determination, and SL channel access. Wherein the SL transmissions may include, but are not limited to, at least one of PSSCH and PSFCH.

The second terminal includes at least one of:

one or more terminals belonging to the same multicast as the first terminal;

one or more terminals detected by the first terminal;

one or more terminals transmitting broadcast messages;

one or more terminals transmitting unicast messages to the first terminal.

The first information includes at least one of first indication information and COT related information; the first indication information includes information about a first resource, where the first resource is a SL resource recommended by the first terminal to the second terminal to perform the operation related to SL transmission in the COT.

The first indication information may specifically include at least one of an identification of the second terminal, a time domain location of the first resource, a frequency domain location of the first resource, an index number of the first resource, and fourth information. Wherein the fourth information includes at least one of the following indication information of one of the first resource, the COT, and a SL resource allowed to be shared:

1)CPE；

2) A transmission start position or a transmission start symbol;

3) PSSCH DMRS port number;

4) Coding information, such as MCS, MCS table indication, etc.;

5) HARQ indication information;

6)RV；

7) Initially transmitting indication information;

8) Retransmitting the indication information;

9) A target ID;

11 Transmitting content indication information.

Further, the first indication information may be carried by the PSSCH or PSCCH.

The COT related information includes at least one of COT information and residual COT information. Wherein the COT information includes at least one of a duration of the COT and a frequency domain bandwidth of the COT; the remaining COT information includes at least one of a duration of the remaining COT and a frequency domain bandwidth of the remaining COT.

In one example, if the first information includes first indication information, step 1402 includes: and carrying out the operation related to SL transmission according to the first indication information. Specifically, the manner of performing the operation related to SL transmission according to the first indication information may include, but is not limited to, at least one of the following a) and b):

a) In a specific example, the performing the operation related to SL transmission according to the first indication information may include: determining the first resource corresponding to the second terminal according to the first indication information; and carrying out SL transmission on the first resource corresponding to the second terminal, or preferentially selecting the first resource corresponding to the second terminal when carrying out SL resource selection.

For example, suppose UE a initiates a COT after successful channel access and shares the COT to other terminals in the group: UE B, UE C and UE D, the UE B determines a first resource corresponding to the UE B according to the received first indication information, and the UE B performs SL transmission on the first resource; or the UE B performs resource selection, including:

determining a resource selection window;

determining a candidate resource set according to the first resource and the resource selection window;

and preferentially selecting the first resource from the candidate resource set.

As described in the background of the application, in a related communication system, a UE determines SL resources through two modes, one is a scheduling resource allocation (Scheduled resource allocation) mode, called mode1 (mode 1), and the network device allocates the SL resources to the UE; the other is an autonomous resource selection (autonomous resource selection) mode, called mode2 (mode 2), with SL resources being selected autonomously by the UE.

In the related art, for mode2, the specific operation mode is as follows: 1) After the resource selection is triggered, the TX UE first determines a resource selection window, where the lower boundary of the resource selection window is at T1 time after the triggering of the resource selection, and the upper boundary of the resource selection is at T2 time after the triggering, where T2 is a value selected by the UE in a manner of being implemented in PDB (packet delay budget) of its Transport Block (TB) transmission, and T2 is not earlier than T1. 2) The UE needs to determine a candidate set of resources for resource selection (candidate resource set) before the resource selection, specifically, it may be determined according to the RSRP measured on the resources within the resource selection window compared with the corresponding RSRP threshold, and if the RSRP is lower than the RSRP threshold, the resources may be included in the candidate set of resources. 3) After the candidate resource set is determined, the UE randomly selects a transmission resource from the candidate resource set. In the above embodiment of the present application, the first resource is preferentially selected from the candidate resource set. It can be appreciated that the first resource is preferentially selected from the candidate resource set, so that the problem that the sharing effectiveness is reduced due to collision of SL resources selected between UEs and the fact that the residual COT is preempted by other UEs to interrupt the COT and the like can be better avoided, and the effectiveness of COT sharing can be better improved.

b) In another specific example, the performing the operation related to SL transmission according to the first indication information may include: and determining an SL transmission parameter of the second terminal according to the first indication information, wherein the SL transmission parameter comprises at least one of CPE and SL transmission starting position information, and the SL transmission starting position information comprises an SL transmission starting position or an SL transmission starting symbol.

For example, the second terminal determines to perform SL transmission on the first resource according to the received first indication information, where multiple second terminals are mapped to the same first resource, and then CPE and/or transmission start positions (or symbols) of each second terminal on the first resource may be different, and the second terminal determines SL transmission parameters of the second terminal according to the received first indication information.

Wherein the SL transmission parameters are determined by at least one of:

the first terminal indicates;

configuring network side equipment;

pre-configuring network side equipment;

the second terminal is configured;

the second terminal is preconfigured; and

the protocol definition formula is calculated, for example, according to a destination (destination) ID of the second terminal, a number (module ID) of the second terminal, a transmission priority of the second terminal, a logical channel ID, and the like.

In another example, if the first information includes COT related information, step 1402 includes: and selecting SL resources according to the COT related information. Specifically, the COT related information includes at least one of COT information and remaining COT information, and when SL resource selection is performed, resources are preferentially selected in the COT or the remaining COT.

For example, suppose UE a initiates a COT after successful channel access and shares the COT to other terminals in the group: UE B, UE C, UE D, UE B carries out resource selection according to the received COT or residual COT information, including:

determining a resource selection window;

determining a candidate resource set according to the COT (or the residual COT) and the resource selection window;

resources within the COT (or remaining COT) are preferentially selected from the candidate set of resources.

In yet another example, step 1402 may include: and carrying out SL channel access according to the first information.

Specifically, if the first information includes the COT related information, the performing SL channel access according to the first information includes: and accessing the SL channel in the COT by adopting a channel access mode of type2 in listen before talk (listen before talk, LBT).

In the present invention, the channel access manner of type2 may include type2a, type2b or type2 LBT.

Specifically, if the first information includes the first indication information, the performing SL channel access according to the first information includes: and before SL transmission is carried out by using the first resource, accessing an SL channel in the COT by adopting a channel access mode of type2 in the LBT.

LBT types (types) commonly used in NR-U can be classified into Type1, type2A, type B, and Type2C. Type1LBT is a channel interception mechanism based on back-off, and when a transmission node detects that a channel is busy, the transmission node performs back-off, and continues interception until the channel is empty. Type2C is that the transmitting node does not make LBT, i.e., no LBT or immediate transmission. Type2A and Type2B LBT are one-shot LBT, namely, the node makes one LBT before transmission, if the channel is empty, the transmission is carried out, and if the channel is busy, the transmission is not carried out. The difference is that Type2A makes LBT within 25us, which is suitable for use in sharing COT with gap between two transmissions greater than or equal to 25us. While Type2B makes LBT within 16us, it is suitable for the gap between two transmissions to be equal to 16us when sharing COT. In addition, there is Type 2LBT applicable to one of LAA (License Assisted Access, assisted admission), eLAA (enhanced Licensed-Assisted Access), and FeLAA (further enhanced Licensed-Assisted Access, further enhanced Assisted admission Access), and when sharing COT, gap between two transmissions is 25us or more, and Type 2LBT can be adopted by enb and UE. In addition, in the frequency range 2-2, the types of LBT are Type1, type2 and Type3, wherein Type1 is a channel listening mechanism based on back-off, type2 is one-shot LBT, LBT is done for 5us within 8us, and Type3 is not done.

According to the sidelink transmission method, the second terminal can perform the operation related to SL transmission in the channel occupation time COT initiated by the first terminal according to the first information sent by the first terminal, instead of blindly performing the operation related to SL transmission in the channel occupation time COT initiated by the first terminal, and therefore sharing effectiveness of the COT initiated by the first terminal can be improved.

In the sidelink transmission method provided in the embodiment of the present application, the execution body may be an sidelink transmission device. In the embodiment of the present application, a method for executing a sidelink transmission by a sidelink transmission device is taken as an example, and the sidelink transmission device provided in the embodiment of the present application is described.

As shown in fig. 15, an embodiment of the present application provides a sidelink transmission apparatus 1500, which may be applied to a second terminal, and the apparatus 1500 may include: a receiving module 1501 and an executing module 1502.

A receiving module 1501, configured to receive first information sent by a first terminal, where the first information is used for the second terminal to perform an operation related to SL transmission within a channel occupation time COT initiated by the first terminal.

An execution module 1502 is configured to perform the operation related to SL transmission according to the first information.

The second terminal includes at least one of:

one or more terminals belonging to the same multicast as the first terminal;

one or more terminals detected by the first terminal;

one or more terminals transmitting broadcast messages;

one or more terminals transmitting unicast messages to the first terminal.

1)CPE；

2) A transmission start position or a transmission start symbol;

3) PSSCH DMRS port number;

4) Coding information, such as MCS, MCS table indication, etc.;

5) HARQ indication information;

6)RV；

7) Initially transmitting indication information;

8) Retransmitting the indication information;

9) A target ID;

11 Transmitting content indication information.

Further, the first indication information may be carried by the PSSCH or PSCCH.

In one example, if the first information includes first indication information, the execution module 1502 is specifically operable to: and carrying out the operation related to SL transmission according to the first indication information. Specifically, the manner of performing the operation related to SL transmission according to the first indication information may include, but is not limited to, at least one of the following a) and b):

Wherein the SL transmission parameters are determined by at least one of:

the first terminal indicates;

configuring network side equipment;

pre-configuring network side equipment;

the second terminal is configured;

the second terminal is preconfigured; and

In another example, if the first information includes COT related information, the execution module 1502 may be specifically configured to: and selecting SL resources according to the COT related information. Specifically, the COT related information includes at least one of COT information and remaining COT information, and when SL resource selection is performed, resources are preferentially selected in the COT or the remaining COT.

In yet another example, the execution module 1502 may be specifically configured to: and carrying out SL channel access according to the first information.

The sidelink transmission apparatus 1500 provided in the embodiment of the present application can implement each process implemented by the method embodiment of fig. 14, and achieve the same technical effects, and for avoiding repetition, a detailed description is omitted herein.

The channel occupation time sharing device or the sidelink transmission device of the sidelink in the embodiment of the application may be an electronic device, for example, an electronic device with an operating system, or may be a component in the electronic device, for example, an integrated circuit or a chip. The electronic device may be a terminal, or may be other devices than a terminal. By way of example, terminals may include, but are not limited to, the types of terminals 11 listed above, other devices may be servers, network attached storage (Network Attached Storage, NAS), etc., and embodiments of the application are not specifically limited.

Optionally, as shown in fig. 16, the embodiment of the present application further provides a communication device 1600, including a processor 1601 and a memory 1602, where the memory 1602 stores a program or an instruction that can be executed on the processor 1601, for example, when the communication device 1600 is a terminal, the program or the instruction is executed by the processor 1601 to implement each step of the above-mentioned embodiment of the method for sharing time occupied by a channel of a secondary link or the method for transmitting a secondary link, and the same technical effects can be achieved, so that repetition is avoided and detailed descriptions are omitted herein.

The embodiment of the application also provides a first terminal, which comprises a processor and a communication interface, wherein the processor is used for determining first information, the communication interface is used for sending the first information to a second terminal, and the first information is used for the second terminal to perform operations related to SL transmission in a channel occupation time COT initiated by the first terminal. The first terminal embodiment corresponds to the first terminal side method embodiment, and each implementation process and implementation manner of the first terminal side method embodiment are applicable to the first terminal embodiment, and the same technical effects can be achieved.

Or, the embodiment of the application further provides a second terminal, which comprises a processor and a communication interface, wherein the communication interface is used for receiving the first information sent by the first terminal, the processor is used for performing the operation related to the SL transmission according to the first information, and the first information is used for the second terminal to perform the operation related to the SL transmission within the channel occupation time COT initiated by the first terminal. The second terminal embodiment corresponds to the second terminal side method embodiment, and each implementation process and implementation manner of the second terminal side method embodiment are applicable to the second terminal embodiment, and the same technical effects can be achieved

Specifically, fig. 17 is a schematic diagram of a hardware structure of a first terminal or a second terminal for implementing an embodiment of the present application.

The terminal 1700 includes, but is not limited to: at least some of the components of the radio frequency unit 1701, the network module 1702, the audio output unit 1703, the input unit 1704, the sensor 1705, the display unit 1706, the user input unit 1707, the interface unit 1708, the memory 1709, the processor 1710, and the like.

Those skilled in the art will appreciate that terminal 1700 may also include a power source (e.g., a battery) for powering the various components, which may be logically connected to processor 1710 via a power management system so as to perform functions such as managing charge, discharge, and power consumption via the power management system. The terminal structure shown in fig. 17 does not constitute a limitation of the terminal, and the terminal may include more or less components than shown, or may combine some components, or may be arranged in different components, which will not be described in detail herein.

It should be appreciated that in embodiments of the present application, the input unit 1704 may include a graphics processing unit (Graphics Processing Unit, GPU) 17041 and a microphone 17042, with the graphics processor 17041 processing image data of still pictures or video obtained by an image capturing device (e.g., a camera) in a video capturing mode or an image capturing mode. The display unit 1706 may include a display panel 17061, and the display panel 17061 may be configured in the form of a liquid crystal display, an organic light emitting diode, or the like. The user input unit 1707 includes at least one of a touch panel 17071 and other input devices 17072. The touch panel 17071 is also referred to as a touch screen. The touch panel 17071 can include two parts, a touch detection device and a touch controller. Other input devices 17072 may include, but are not limited to, a physical keyboard, function keys (e.g., volume control keys, switch keys, etc.), a trackball, a mouse, a joystick, and so forth, which are not described in detail herein.

In this embodiment, after receiving downlink data from the network side device, the radio frequency unit 1701 may transmit the downlink data to the processor 1710 for processing; in addition, the radio frequency unit 1701 may send uplink data to the network side device. In general, the radio frequency unit 1701 includes, but is not limited to, an antenna, an amplifier, a transceiver, a coupler, a low noise amplifier, a duplexer, and the like.

The memory 1709 may be used for storing software programs or instructions and various data. The memory 1709 may mainly include a first storage area storing programs or instructions and a second storage area storing data, wherein the first storage area may store an operating system, application programs or instructions (such as a sound playing function, an image playing function, etc.) required for at least one function, and the like. Further, the memory 1709 may include volatile memory or nonvolatile memory, or the memory 1709 may include both volatile and nonvolatile memory. The nonvolatile Memory may be a Read-Only Memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an Electrically Erasable EPROM (EEPROM), or a flash Memory. The volatile memory may be random access memory (Random Access Memory, RAM), static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double Data Rate SDRAM (ddr SDRAM), enhanced SDRAM (Enhanced SDRAM), synchronous DRAM (SLDRAM), and Direct RAM (DRRAM). Memory 1709 in embodiments of the present application includes, but is not limited to, these and any other suitable types of memory.

Processor 1710 can include one or more processing units; optionally, the processor 1710 integrates an application processor that primarily handles operations related to the operating system, user interface, and applications, and a modem processor that primarily handles wireless communication signals, such as a baseband processor. It will be appreciated that the modem processor described above may not be integrated into the processor 1710.

In one embodiment, the processor 1710 is configured to determine first information, where the first information is used for the second terminal to perform an operation related to SL transmission within a channel occupation time COT initiated by the first terminal; the interface unit 1708 is configured to transmit the first information to the second terminal.

Optionally, the first information includes the first indication information, where the first indication information includes information about a first resource, where the first resource is a SL resource recommended by the first terminal to the second terminal to perform the operation related to SL transmission in the COT, and the processor 1710 is specifically configured to determine the first resource in the COT before the first information is sent to the second terminal.

Optionally, the processor 1710 is specifically configured to divide the first resource in the COT according to a first parameter, where the first parameter includes at least one of a length of the first resource and a number of the first resource, and the length of the first resource includes at least one of a time domain length of the first resource and a frequency domain length of the first resource.

Optionally, the processor 1710 is further configured to determine, before dividing the first resource in the COT according to a first parameter, a length of the first resource according to a first preset content;

wherein the first preset content comprises at least one of the following:

the COT related information;

resource reservation information of the second terminal in the COT;

a second parameter, where the second parameter includes at least one of a number of terminals in a multicast to which the first terminal belongs, an amount of data to be received by the first terminal, an amount of information received by the first terminal from the multicast to which the first terminal belongs, and a request received by the first terminal from the multicast to which the first terminal belongs;

a protocol specification; and

at least one of network side equipment pre-configuration, network side equipment indication, first terminal configuration, first terminal pre-configuration and second terminal indication.

Optionally, the processor 1710 is further configured to determine, before dividing the first resource in the COT according to a first parameter, the number of the first resources according to a second preset content;

wherein the second preset content comprises at least one of the following:

The number of the second terminals or the number of the terminals in the multicast to which the first terminal belongs;

the COT related information;

second information including resource reservation information of one or more terminals detected by the first terminal within the COT, or resource request information of one or more terminals detected by the first terminal within the COT, wherein the one or more terminals detected by the first terminal include the second terminal;

Optionally, the processor 1710 is specifically configured to determine a mapping relationship between the first resource and the second terminal in the COT.

Optionally, the determining the mapping relationship between the first resource and the second terminal in the COT includes:

determining a mapping relation between the first resource and the second terminal according to third information and the identification of the second terminal;

wherein the third information includes at least one of:

at least one of a time domain location and a frequency domain location of the first resource;

At least one of a highest interleaving index and a lowest interleaving index of the first resource;

index number of the first resource;

resource reservation information of the second terminal in the COT;

detecting the time sequence of the resource reservation information of the second terminal in the COT;

at least one of a transmission resource size and a location of the first terminal;

a Physical Sidelink Feedback Channel (PSFCH) or a designated PSFCH in a first time range, wherein the first time range is at least one of a preset value agreed by a protocol, a value configured by network side equipment, a value indicated by network side equipment, a value configured by the first terminal and a value indicated by the second terminal;

a hash algorithm; and

the method comprises the steps of pre-defining a protocol, pre-configuring network side equipment, indicating network side equipment, pre-configuring the first terminal, configuring the first terminal and indicating the second terminal.

In the above embodiment, the terminal shown in fig. 17 is capable of sending the first information to the second terminal, so that the second terminal performs the operation related to SL transmission according to the first information within the channel occupation time COT initiated by the first terminal, instead of blindly performing the operation related to SL transmission within the channel occupation time COT initiated by the first terminal, thereby improving the sharing effectiveness of the COT initiated by the first terminal.

In another embodiment, the interface unit 1708 is configured to receive first information sent by a first terminal, where the first information is used for the second terminal to perform an operation related to SL transmission within a channel occupation time COT initiated by the first terminal; processor 1710 is configured to perform the operation related to SL transmission according to the first information.

Optionally, the first information includes at least one of first indication information and COT related information; the first indication information includes information about a first resource, where the first resource is a SL resource recommended by the first terminal to the second terminal to perform the operation related to SL transmission in the COT.

Optionally, the processor 1710 is specifically configured to determine, according to the first indication information, the first resource corresponding to the second terminal; and carrying out SL transmission on the first resource corresponding to the second terminal, or preferentially selecting the first resource corresponding to the second terminal when carrying out SL resource selection.

Optionally, the processor 1710 is specifically configured to determine, according to the first indication information, a SL transmission parameter of the second terminal, where the SL transmission parameter includes at least one of a cyclic prefix extension CPE and SL transmission start location information, and the SL transmission start location information includes a SL transmission start location or a SL transmission start symbol.

Optionally, the processor 1710 is specifically configured to perform SL resource selection according to the COT related information.

Optionally, the processor 1710 is specifically configured to, when making SL resource selection, preferentially select resources within the COT or within the remaining COTs.

Optionally, the processor 1710 is specifically configured to perform SL channel access according to the first information.

Optionally, the processor 1710 is specifically configured to access the SL channel in the COT by using a channel access method of type2 in listen before talk LBT.

Optionally, the processor 1710 is specifically configured to access the SL channel in the COT by using a channel access method of type2 in listen before talk LBT before using the first resource for SL transmission.

In the above embodiment, the terminal shown in fig. 17 performs the operation related to SL transmission in the channel occupation time COT initiated by the first terminal according to the first information sent by the first terminal, instead of blindly performing the operation related to SL transmission in the channel occupation time COT initiated by the first terminal, so that the sharing effectiveness of the COT initiated by the first terminal can be improved.

The embodiment of the present application further provides a readable storage medium, where a program or an instruction is stored on the readable storage medium, and when the program or the instruction is executed by a processor, the program or the instruction implements each process of the above-mentioned embodiment of the time sharing method for channel occupation of the sidelink or the sidelink transmission method, and the same technical effect can be achieved, so that repetition is avoided, and no detailed description is given here.

Wherein the processor is a processor in the terminal described in the above embodiment. The readable storage medium includes computer readable storage medium such as computer readable memory ROM, random access memory RAM, magnetic or optical disk, etc.

The embodiment of the application further provides a chip, where the chip includes a processor and a communication interface, where the communication interface is coupled to the processor, where the processor is configured to run a program or an instruction, implement each process of the above-mentioned embodiment of the time sharing method or the sidelink transmission method for the sidelink channel, and achieve the same technical effect, so that repetition is avoided, and no redundant description is given here.

It should be understood that the chips referred to in the embodiments of the present application may also be referred to as system-on-chip chips, or the like.

The embodiments of the present application further provide a computer program/program product, where the computer program/program product is stored in a storage medium, and the computer program/program product is executed by at least one processor to implement the processes of the above-mentioned embodiments of the method for sharing time occupied by a channel of a sidelink or the method for transmitting a sidelink, and achieve the same technical effects, and for avoiding repetition, a detailed description is omitted herein.

It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element. Furthermore, it should be noted that the scope of the methods and apparatus in the embodiments of the present application is not limited to performing the functions in the order shown or discussed, but may also include performing the functions in a substantially simultaneous manner or in an opposite order depending on the functions involved, e.g., the described methods may be performed in an order different from that described, and various steps may also be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

From the above description of the embodiments, it will be clear to those skilled in the art that the above-described embodiment method may be implemented by means of software plus a necessary general hardware platform, but of course may also be implemented by means of hardware, but in many cases the former is a preferred embodiment. Based on such understanding, the technical solutions of the present application may be embodied essentially or in a part contributing to the prior art in the form of a computer software product stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk), comprising several instructions for causing a terminal (which may be a mobile phone, a computer, a server, an air conditioner, or a network device, etc.) to perform the method described in the embodiments of the present application.

The embodiments of the present application have been described above with reference to the accompanying drawings, but the present application is not limited to the above-described embodiments, which are merely illustrative and not restrictive, and many forms may be made by those of ordinary skill in the art without departing from the spirit of the present application and the scope of the claims, which are also within the protection of the present application.

Claims

1. A method of channel occupancy time sharing for a sidelink, the method comprising:

and sending the first information to the second terminal.

2. The method of claim 1, wherein the second terminal comprises at least one of:

one or more terminals belonging to the same multicast as the first terminal;

one or more terminals detected by the first terminal;

one or more terminals transmitting broadcast messages;

one or more terminals transmitting unicast messages to the first terminal.

3. The method of claim 1, wherein the first information comprises at least one of first indication information and COT related information;

the first indication information includes information about a first resource, where the first resource is a SL resource recommended by the first terminal to the second terminal to perform the operation related to SL transmission in the COT.

4. The method of claim 3, wherein the first information comprises the first indication information, and wherein the determining the first information comprises:

determining the first resource in the COT.

5. The method of claim 4, wherein the determining the first resource in the COT comprises:

dividing the first resource in the COT according to a first parameter, wherein the first parameter comprises at least one of a length of the first resource and a number of the first resource, and the length of the first resource comprises at least one of a time domain length of the first resource and a frequency domain length of the first resource.

6. The method of claim 5, wherein the first parameter comprises a length of the first resource, the method further comprising, prior to the partitioning the first resource in the COT according to the first parameter:

Determining the length of the first resource according to first preset content;

wherein the first preset content comprises at least one of the following:

the COT related information;

resource reservation information of the second terminal in the COT;

a protocol specification; and

7. The method of claim 6, wherein the first preset content includes the COT related information, and wherein determining the length of the first resource based on the first preset content comprises:

determining the time domain length of the COT or the time domain length of the residual COT as the time domain length of the first resource, and/or determining a preset frequency domain length as the frequency domain length of the first resource;

Or,

determining a time domain length of the first resource as at least one time slot, and/or determining one of a frequency domain bandwidth of the COT, a frequency domain width of the remaining COT and a preset frequency domain length as the frequency domain length of the first resource;

8. The method of claim 5, wherein the first parameter comprises a number of the first resources, the method further comprising, prior to the partitioning the first resources in the COT according to the first parameter:

determining the number of the first resources according to the second preset content;

wherein the second preset content comprises at least one of the following:

the COT related information;

9. The method of claim 4, wherein the determining the first resource in the COT comprises:

and determining the mapping relation between the first resource and the second terminal in the COT.

10. The method of claim 9, wherein the determining the mapping relationship between the first resource and the second terminal in the COT comprises:

wherein the third information includes at least one of:

index number of the first resource;

resource reservation information of the second terminal in the COT;

a hash algorithm; and

11. The method of claim 10, wherein the step of determining the position of the first electrode is performed,

the identification of the second terminal comprises at least one of the number of the second terminal in the multicast to which the second terminal belongs and the source ID of the second terminal.

12. The method of claim 3, wherein the step of,

the first indication information includes at least one of: at least one of an identification of the second terminal, a time domain location of the first resource, a frequency domain location of the first resource, an index number of the first resource, and fourth information;

Wherein the fourth information includes at least one of the following indication information of one of the first resource, the COT, and a SL resource allowed to be shared:

cyclic prefix extension CPE;

a transmission start position or a transmission start symbol;

the number of ports of the physical sidelink shared channel demodulation reference signal PSSCH DMRS;

encoding information;

hybrid automatic repeat request (HARQ) indication information;

redundancy version RV;

initially transmitting indication information;

retransmitting the indication information;

a target ID;

a propagation type indication information, the propagation type including one of unicast, multicast, and broadcast;

and transmitting content indication information.

13. The method according to any one of claims 3 to 12, wherein,

the first indication information is carried by a physical sidelink shared channel PSSCH or a physical sidelink control channel PSCCH.

14. The method according to any one of claims 3 to 12, wherein,

the COT related information includes at least one of COT information and residual COT information.

15. The method of claim 14, wherein the step of providing the first information comprises,

the COT information includes at least one of a duration of the COT and a frequency domain bandwidth of the COT;

the remaining COT information includes at least one of a duration of the remaining COT and a frequency domain bandwidth of the remaining COT.

16. The method according to any one of claims 1 to 12, wherein,

the operation related to SL transmission includes one of SL transmission, SL resource determination, and SL channel access.

17. The method of claim 16, wherein the step of determining the position of the probe comprises,

the SL transmissions include at least one of a physical sidelink shared channel PSSCH and a physical sidelink feedback channel PSFCH.

18. A channel occupancy time sharing apparatus for a sidelink, the apparatus comprising:

19. A sidelink transmission method, wherein the method comprises, as a result of execution by a second terminal:

20. The method of claim 19, wherein the step of determining the position of the probe comprises,

21. The method of claim 20, wherein the step of determining the position of the probe is performed,

22. The method of claim 19, wherein the second terminal comprises at least one of:

one or more terminals belonging to the same multicast as the first terminal;

one or more terminals detected by the first terminal;

one or more terminals transmitting broadcast messages;

one or more terminals transmitting unicast messages to the first terminal.

23. The method of claim 19, wherein the first information comprises at least one of first indication information and COT related information;

24. The method of claim 23, wherein the first information includes the first indication information, and wherein the performing the operation related to SL transmission according to the first information includes:

And carrying out the operation related to SL transmission according to the first indication information.

25. The method of claim 24, wherein the performing the operation related to SL transmission according to the first indication information comprises:

determining the first resource corresponding to the second terminal according to the first indication information;

and carrying out SL transmission on the first resource corresponding to the second terminal, or preferentially selecting the first resource corresponding to the second terminal when carrying out SL resource selection.

26. The method of claim 24, wherein the performing the operation related to SL transmission according to the first indication information comprises:

and determining an SL transmission parameter of the second terminal according to the first indication information, wherein the SL transmission parameter comprises at least one of cyclic prefix extension CPE and SL transmission starting position information, and the SL transmission starting position information comprises an SL transmission starting position or an SL transmission starting symbol.

27. The method of claim 26, wherein the SL transmission parameters are determined by at least one of:

the first terminal indicates;

Configuring network side equipment;

pre-configuring network side equipment;

the second terminal is configured;

the second terminal is preconfigured;

and (5) calculating a formula defined by a protocol.

28. The method of claim 23, wherein the first information comprises COT-related information, and wherein the performing the operation related to SL transmission according to the first information comprises:

and selecting SL resources according to the COT related information.

29. The method of claim 28, wherein the SL resource selection based on the COT-related information comprises:

when SL resource selection is performed, resources are preferentially selected in the COT or the residual COT.

30. The method of claim 23, wherein said performing said operation related to SL transmission based on said first information comprises:

and carrying out SL channel access according to the first information.

31. The method of claim 30, wherein the first information includes the COT related information, and wherein the performing SL channel access according to the first information includes:

and accessing the SL channel in the COT by adopting a channel access mode of type2 in Listen Before Talk (LBT).

32. The method of claim 30, wherein the first information includes the first indication information, and wherein the performing SL channel access according to the first information includes:

Before the first resource is used for SL transmission, a channel access mode of type2 in Listen Before Talk (LBT) is adopted to access an SL channel in the COT.

33. The method of any one of claims 23-32, wherein,

cyclic prefix extension CPE;

a transmission start position or a transmission start symbol;

encoding information;

hybrid automatic repeat request (HARQ) indication information;

redundancy version RV;

initially transmitting indication information;

retransmitting the indication information;

a target ID;

and transmitting content indication information.

34. The method of any one of claims 23-32, wherein,

35. The method of any one of claims 23-32, wherein,

36. The method of claim 35, wherein the step of determining the position of the probe is performed,

37. A sidelink transmission apparatus, comprising:

38. A terminal comprising a processor and a memory storing a program or instructions executable on the processor, which when executed by the processor, performs the steps of the channel occupancy time sharing method of a sidelink of any of claims 1 to 17.

39. A terminal comprising a processor and a memory storing a program or instructions executable on the processor, which when executed by the processor, performs the steps of the sidelink transmission method of any of claims 19-36.

40. A readable storage medium, wherein a program or instructions is stored on the readable storage medium, which when executed by a processor implements the steps of the channel occupancy time sharing method of a sidelink according to any one of claims 1-17, or which when executed by a processor implements the steps of the sidelink transmission method of any one of claims 19-36.