CN117560783A

CN117560783A - Side link channel occupation time COT sharing method and terminal

Info

Publication number: CN117560783A
Application number: CN202210917418.3A
Authority: CN
Inventors: 王欢; 纪子超
Original assignee: Vivo Mobile Communication Co Ltd
Current assignee: Vivo Mobile Communication Co Ltd
Priority date: 2022-08-01
Filing date: 2022-08-01
Publication date: 2024-02-13
Also published as: WO2024027558A1

Abstract

The application discloses a sharing method and a terminal for COT (chip on board) of side link channel occupation time, belonging to the technical field of communication. The method comprises the steps that a first terminal sends an indication signaling to a second terminal, wherein the indication signaling is used for indicating recommended resources, and transmission resources of the indication signaling and the recommended resources are located in the same COT.

Description

Side link channel occupation time COT sharing method and terminal

Technical Field

The application belongs to the technical field of communication, and particularly relates to a side link channel occupation time COT sharing method and a terminal.

Background

Listen-before-talk (Listen Before Talk, LBT) is required before a Sidelink (SL) transmission on an unlicensed spectrum (unlicensed spectrum), and if a channel occupation time (Channel Occupancy Time, COT) is shared between devices, a terminal (UE) using the shared COT needs to do only a short LBT or not LBT, which can increase the probability of the device accessing the channel. COT sharing (COT sharing) may be used for transmission resources that a UE may recommend to another UE in order to make it easier for the other UE to access the channel.

However, according to the NR-side link resource selection enhancement scheme, there is a minimum time interval limit between transmission resources of indication signaling and recommended resources, and for 15kHz subcarrier spacing (SCS), the minimum time from the transmission of the indication signaling to the recommended resources is up to 6ms, which limits the use range of COT sharing because the length of COT is not longer than 10ms (typically COT length is less than 6 ms), in addition, the resource selection of the indication signaling transmission resources is mode 2 resource selection, the interval between the indication signaling transmission resources and the recommended resources may be far longer than the minimum time interval, which may cause the COT sharing indication failure.

Disclosure of Invention

The embodiment of the application provides a method and a terminal for sharing COT (chip on board) occupation time of a side chain channel, which can solve the problem that the use range of COT sharing is limited due to the fact that minimum time interval limitation exists between transmission resources and recommended resources of indication signaling in the related technology.

In a first aspect, a side link channel occupation time COT sharing is provided and applied to a first terminal, where the method includes:

the method comprises the steps that a first terminal sends an indication signaling to a second terminal, wherein the indication signaling is used for indicating recommended resources, and transmission resources of the indication signaling and the recommended resources are located in the same COT.

In a second aspect, there is provided a side link channel occupation time COT sharing applied to a second terminal, the method comprising:

the second terminal receives an indication signaling sent by the first terminal, wherein the indication signaling is used for indicating recommended resources, and transmission resources of the indication signaling and the recommended resources are in the same COT.

In a third aspect, there is provided a side link channel occupation time COT sharing apparatus, the apparatus comprising:

the first sending unit is used for sending an indication signaling to the second terminal, wherein the indication signaling is used for indicating recommended resources, and the transmission resources of the indication signaling and the recommended resources are in the same COT.

In a fourth aspect, there is provided a side link channel occupation time COT sharing apparatus, the apparatus comprising:

the first receiving unit is used for receiving an indication signaling sent by the first terminal, wherein the indication signaling is used for indicating recommended resources, and transmission resources of the indication signaling and the recommended resources are in the same COT.

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 side link channel occupation time COT sharing method according to the first aspect.

In a sixth aspect, a terminal is provided, including a processor and a communication interface, where the communication interface is configured to receive an indication signaling sent by a first terminal, where the indication signaling is used to indicate a recommended resource, and a transmission resource of the indication signaling and the recommended resource are in the same COT.

In a seventh 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 side link channel occupation time COT sharing method according to the second aspect.

An eighth aspect provides a terminal, including a processor and a communication interface, where the communication interface is configured to receive an indication signaling sent by a first terminal, where the indication signaling is used to indicate a recommended resource, and a transmission resource of the indication signaling and the recommended resource are in the same COT.

In a ninth aspect, there is provided a communication system comprising: a first terminal operable to perform the steps of the side link channel occupation time COT sharing method according to the first aspect, and a second terminal operable to perform the steps of the side link channel occupation time COT sharing method according to the second aspect.

In a tenth aspect, there is provided a readable storage medium having stored thereon a program or instructions which, when executed by a processor, implement the steps of the side link channel occupation time COT sharing method according to the first aspect, or implement the steps of the side link channel occupation time COT sharing method according to the second aspect.

In an eleventh aspect, there is provided a chip, the chip including a processor and a communication interface, the communication interface being coupled to the processor, the processor being configured to execute a program or instructions to implement the side link channel occupation time COT sharing method according to the first aspect, or to implement the side link channel occupation time COT sharing method according to the second 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 side link channel occupation time COT sharing method according to the first aspect, or to implement the side link channel occupation time COT sharing method according to the second aspect.

In the embodiment of the application, the transmission resource of the indication signaling and the recommended resource are located in the same COT, so that the time interval between the transmission resource of the indication signaling and the recommended resource is shortened, the terminal can better realize SL COT sharing, and the use scene of COT sharing is expanded.

Drawings

Fig. 1 is a block diagram of a wireless communication system to which embodiments of the present application are applicable;

fig. 2 is a diagram illustrating a minimum time interval between transmission resources and recommended resources of indication signaling in the related art;

fig. 3 is one of flow diagrams of a side-chain channel occupation time COT sharing method provided in an embodiment of the present application;

FIG. 4 is a schematic diagram of resource selection provided in an embodiment of the present application;

FIG. 5 is a second flow chart of a method for sharing COT of side-link channel occupation time according to an embodiment of the present disclosure;

fig. 6 is a schematic structural diagram of a side-link channel occupation time COT sharing apparatus according to an embodiment of the present application;

FIG. 7 is a second schematic diagram of a side-link channel occupation time COT sharing device according to an embodiment of the present disclosure;

fig. 8 is a schematic structural diagram of a communication device according to an embodiment of the present application;

fig. 9 is a schematic hardware structure of a terminal implementing 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 and not to limit the number of objects, for example, the first object 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 the embodiments of the present application are often used interchangeably, and the techniques described are applicable to both the above-mentioned systems The system and radio technology may also be used for other systems and radio technologies. The following description describes a New air interface (NR) system for purposes of example and uses NR terminology in much of the description that follows, 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 core network device may include, but is not limited to, at least one of: core network nodes, core network functions, mobility management entities (Mobility Management Entity, MME), access mobility management functions (Access and Mobility Management Function, AMF), session management functions (Session Management Function, SMF), user plane functions (User Plane Function, UPF), policy control functions (Policy Control Function, PCF), policy and charging rules function units (Policy and Charging Rules Function, PCRF), edge application service discovery functions (Edge Application Server Discovery Function, EASDF), unified data management (Unified Data Management, UDM), unified data repository (Unified Data Repository, UDR), home subscriber server (Home Subscriber Server, HSS), centralized network configuration (Centralized network configuration, CNC), network storage functions (Network Repository Function, NRF), network opening functions (Network Exposure Function, NEF), local NEF (or L-NEF), binding support functions (Binding Support Function, BSF), application functions (Application Function, AF), and the like. In the embodiment of the present application, only the core network device in the NR system is described as an example, and the specific type of the core network device is not limited.

The following description is of the relevant content related to the present application.

1. NR sidelink resource allocation/selection

There are two ways of NR SL resource allocation, one based on base station scheduling (mode 1) and the other based on UE autonomous resource selection (mode 2). For a resource allocation mode of base station scheduling, a sidelink resource of the UE for data transmission is determined by the base station, and a transmitting end UE (TX UE) is notified through downlink signaling; for the resource allocation mode of autonomous selection of the UE, the UE selects available transmission resources in a (pre) configured resource pool, the UE firstly monitors a channel before the resource selection, selects a resource set with smaller interference according to a channel monitoring result, and then randomly selects the resources for transmission from the resource set.

For mode 2, the specific operation is as follows: 1) After the resource selection of the TX UE is triggered, the physical PHY layer determines a resource selection window firstly, the lower boundary of the resource selection window is at T1 time after the triggering of the resource selection, the upper boundary of the resource selection is at T2 time after the triggering, where T1 is a value selected by the UE implementation within a range of [ t1_min, t1_max ], and T2 is a value selected by the UE implementation within a packet delay budget (packet delay budget, PDB) transmitted by a Transport Block (TB) thereof, and T2 is not earlier than T1. 2) Before the UE selects a resource, the PHY layer needs to determine an alternative resource set (candidate resource set) for the resource selection, where the number of sub-channels of the alternative resources is determined by the medium access control (Media Access Control, MAC) layer, and the UE performs resource exclusion on the resource if the RSRP is higher than the RSRP threshold, and cannot include the alternative resource set according to a reference signal received power (reference signal received power, RSRP) measurement estimated on the resource within the resource selection window (e.g., by listening to a physical side link control channel (Physical Sidelink Control Channel, PSCCH)/physical side link shared channel (Physical Sidelink Shared Channel, PSSCH) estimation). And after the resource is removed, the remaining resources in the resource selection window form an alternative resource set. The ratio of the resources in the alternative resource set to the resources in the resource selection window is not less than x%, if the ratio is less than x%, the RSRP threshold needs to be increased according to a step value (3 dB), and then the resource exclusion operation is performed until the ratio of the resources not less than x% can be selected. In addition, the RSRP comparison is related to the priority (priority) of the TB to be transmitted and the priority value demodulated on the PSCCH, and the specific process is not repeated. 3) After the alternative resource set is determined, the PHY layer reports the alternative resource set to the MAC layer, the MAC layer randomly selects transmission resources in the alternative resource set, and the number of the selected resources is determined according to the decision of the MAC layer.

The method and the terminal for sharing the side link channel occupation time COT provided by the embodiments of the present application are described in detail below with reference to the accompanying drawings.

2. NR sidelink resource selection enhancement scheme

The NR SL mode 2 resource selection enhancement scheme introduces the concept of inter-terminal coordination (inter-UE coordination). The UE-A sends resource recommendation information to the UE-B, and the UE-B utilizes the resource recommendation information to select resources. Wherein, the UE-A may recommend resources to the UE-B based on the request signaling sent by the UE-B or recommend resources to the UE-B based on the UE implementation.

The resource recommendation information sent by UE-A to UE-B includes both resources (preferred resource) that are intended for UE-B and resources (non-preferred resource) that are not intended for UE-B. When the UE-B receives the preferred resource indication, the UE-B may perform two resource selection actions, i.e. 1) the UE-B may directly select its transmission resource from preferred resource, or 2) the UE-B performs resource selection by combining its own sending result and preferred resource; when the UE-B receives the non-preferred resource, the UE-B combines the self sending result and the non-preferred resource to perform resource selection.

When the UE-A recommends resources to the UE-B, the UE-A first selects preferred resource/non-preferred resource and then selects transmission resources (Inter-UE coordination information/IUC transmission resources) for indication signaling for indication preferred resource/non-preferred resource. Wherein a minimum time interval is agreed between the transmission resource of the indication signaling and preferred resource/non-preferred resource, namely Tproc,0+tproc,1+tproc,2.Tproc,0 (refer to Table 8.1.4-1TS 38.214) is the sending result collection time, tproc,1 (refer to Table 8.1.4-2 TS 38.214) is the resource selection preparation and PSCCH/PSSCH transmission preparation time, tproc,2 is the demodulation time upper limit of the indication signaling. When the indication signaling is 2nd SCI, tproc, 2=tproc, 0; when the indication signaling is a medium access control layer control unit (Media Access Control Control Unit, MAC CE), tproc, 2=tproc, 0+tproc,1. The UE-a may guarantee the time interval limitation by adjusting the resource selection window when selecting the transmission resource indicating the signaling, as shown in fig. 2. If the minimum time interval is not met between the transmission resource of the indication signaling and preferred resource/non-preferred resource, the UE-B may not consider preferred resource/non-preferred resource which does not meet the time interval constraint in resource selection.

3. Introduction of Sidelink in unlicensed spectrum

For SL-U (unlicensed spectrum), it is necessary to acquire a channel through LBT before transmitting SL data. The LBT technique is briefly described as follows:

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. To keep pace with NR deployment and maximize as much as possible unlicensed access based on NR, unlicensed bands may operate in the 5GHz,37GHz and 60GHz bands. Since unlicensed bands are shared by multiple technologies (RATs), such as WiFi, radar, LTE-LAA, etc., in some countries or regions, unlicensed bands must meet regulations to ensure that all devices can use the resources fairly, such as LBT, maximum channel occupancy time (maximum channel occupancy time, MCOT), etc. When the transmission node needs to transmit information, LBT needs to be made first, power detection (ED) is performed on surrounding nodes, and when the detected power is lower than a threshold, the channel is considered to be empty (idle), and the transmission node can transmit. Otherwise, the channel is considered as busy, and the transmission node cannot transmit. The transmission node may be a base station, UE, wiFi AP, etc. After the transmission node starts transmission, the occupied channel time COT cannot exceed MCOT. Furthermore, according to the rule (regulation) of occupying channel bandwidth (occupied channel bandwidth, OCB), on unlicensed bands, a transmitting node occupies at least 70% (60 GHz) or 80% (5 GHz) of the entire band at each transmission.

Types (types) of LBT commonly used in NRU can be classified into Type1, type2A, type2B, and Type2C. Type1 LBT 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 immediately transmit (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 LAA/eLAA/FeLAA, and when co is shared, the gap between two transmissions is 25us or more, and Type 2LBT may be used by enb and UE. In addition, in the frequency range 2-2, the Type of LBT is Type1, type2 and Type3.Type1 is a channel listening mechanism based on back-off, type2 is one-shot LBT, 5us LBT is done within 8us, and Type3 is no LBT.

4. COT sharing

1) Channel occupancy time sharing for base stations

After the base station initiates the COT, resources in the COT can be used for downlink transmission, and resources in the COT can be shared for the UE for uplink transmission. When the resources in the COT are shared to perform uplink transmission for the UE, the channel access mode that the UE can use is Type 2A LBT,Type 2B LBT or Type 2C LBT.

2) Channel occupancy time sharing at UE side

After the UE initiates the COT using the Type1 LBT, resources in the COT may be used for uplink transmission, and resources in the COT may be shared to the base station for downlink transmission. In an NR-U system, the base station sharing the UE initiated COT includes two cases: one case is the COT of the base station sharing the scheduled PUSCH; another case is the COT of PUSCH where the base station shares a scheduling-free grant.

Fig. 3 is a schematic flow chart of a side-channel occupation time COT sharing method according to an embodiment of the present application. As shown in fig. 3, the method includes:

step 300, the first terminal sends an indication signaling to the second terminal, wherein the indication signaling is used for indicating recommended resources.

The recommended resource may be a transmission resource recommended to the second terminal, a shared COT indicated to the second terminal, a time or a time unit or a time period when the type 2 LBT is executed, and the like. The type 2 LBT includes one or more of type 2A LBT,type 2B LBT and type 2C LBT.

The transmission resource of the indication signaling and the recommended resource are in the same COT.

In the embodiment of the application, the first terminal sends the indication signaling to the second terminal, the indication signaling is used for indicating the recommended resource, and the transmission resource of the indication signaling and the recommended resource are in the same COT, so that the terminal can better realize SL COT sharing, and the service scene of COT sharing is expanded.

Optionally, the embodiment of the application can enable the terminal to better realize SL COT sharing by shortening the time interval between the transmission resource and the recommended resource of the indication signaling, and expand the use scene of COT sharing.

It should be noted that, the location of the transmission resource of the instruction signaling includes: indicating the end position of the slot where the signaling is located, indicating the end position of the PSSCH/PSSCH transmission where the signaling is located, etc.

The location of the recommended resource includes: a recommended starting location of transmission resources, a resource location of indicated shared COT, a starting location and/or an ending location, etc.

Optionally, the length of the time interval or minimum time interval between the transmission resource of the indication signaling and the recommended resource includes at least one of:

the second terminal demodulates the upper time limit required by the indication signaling;

The second terminal collects the time of the perception result and/or the time upper limit of the preparation of the resource selection;

the second terminal prepares the upper time limit for the side link SL physical side link control channel PSCCH/physical side link shared channel PSSCH.

Optionally, the length of the time interval or minimum time interval is associated with a processing capability level of the terminal. For example, the high processing capability UE and the low processing capability UE are classified according to the processing capability of the UE, and the length of time interval required for the high processing capability UE is smaller.

Optionally, the length of the time interval or minimum time interval is associated with a subcarrier spacing SCS. With high SCS resource configurations, the length of the time interval can be defined using finer granularity of time, which can be relatively shortened.

Optionally, the length of the time interval or minimum time interval is agreed, configured or preconfigured by the protocol, or at least one of the components of the length of the time interval or minimum time interval is agreed, configured or preconfigured by the protocol.

Here, the respective components may be an upper time limit required for the second terminal to demodulate the indication signaling, an upper time limit for the second terminal to collect the sensing result and/or a preparation of the resource selection, or an upper time limit required for the second terminal to prepare the side link SL physical side link control channel PSCCH/physical side link shared channel PSCCH.

Optionally, the sending, by the first terminal, the indication signaling to the second terminal includes: the first terminal sends an indication signaling to the second terminal by using a side link control information format SCI format n.

Wherein, SCI format n includes 1st stage SCI or 2nd stage SCI.

The SL control information is carried by two stages of SCIs, 1st stage SCI and 2nd stage SCI. Wherein 1st stage SCI maps to PSCCH and 2nd stage SCI maps to PSSCH.

The first terminal transmits an indication signaling to the second terminal using the SCI format n to indicate recommended resources, so that the time required for the second terminal to demodulate the indication signaling or the length of the time interval can be shortened.

Alternatively, in the case where SCI format n is 1st stage SCI, the UE may send multiple/two 1st stage SCIs simultaneously (e.g., sent in different sub-channels/interfaces/RBs sets/bands), one of which is SCI format n. The advantage is to guarantee the demodulation reliability of different kinds of SCI.

Alternatively, the ability to demodulate SCI format n is optional.

Optionally, the method further comprises: the first terminal and the second terminal negotiate to determine the capability of the second terminal to demodulate the SCI format n.

The first terminal and the second terminal negotiate to determine the capability of the second terminal to demodulate the SCI format n, so that the second terminal is not forced to have the capability of demodulating the SCI format n, and the complexity of terminal implementation can be reduced.

Optionally, the capability of demodulating the SCI format n is configured or preconfigured by a resource set (per pool/per BWP/per band/per CC/per RB set).

If per pool/per BWP/per band/per CC/per RB set requires the terminal to demodulate the SCI format n, the terminal receiving and/or transmitting in the resource set needs to demodulate the SCI format n.

Optionally, the SCI format n is transmitted together with a transport block TB, and/or a corresponding PSCCH/PSSCH resource selection is triggered by a Padding TB to transmit the SCI format n.

It will be appreciated that if there is a TB transmission, SCI format n may be transmitted with the TB. If there is no TB transmission, a corresponding PSCCH/PSSCH resource selection is triggered by a Padding (Padding) TB to transmit the SCI format n.

Optionally, when the second terminal directly selects a transmission resource from the resources indicated by the indication signaling to perform SL transmission after demodulating the indication signaling, the time for the second terminal to collect the sensing result and the time for preparing the resource selection are preset values.

It can be appreciated that, if the second terminal directly selects the transmission resource from the resources indicated by the indication signaling for SL transmission after demodulating the indication signaling, the second terminal ready sensing (sensing) result and the time for preparing the resource selection may be omitted or reduced.

Optionally, the time for the second terminal to collect the sensing result and the time for the preparation of the resource selection are preset values, for example Tproc,0,Tproc,1,N symbol,0ms, etc.

Optionally, in the case that the second terminal selects a transmission resource for SL transmission directly from the resource indicated by the indication signaling after demodulating the indication signaling, the time for which the second terminal collects the sensing result, the time for preparation of the resource selection, and the time required for preparation of the SL PSCCH/psch (i.e. Tproc,0+tproc, 1) are preset values (e.g. the time for preparation of PSCCH/psch transmission to the UE is shortened, etc.).

Optionally, the method further comprises: the first terminal and the second terminal negotiate whether the second terminal can directly select transmission resources from the resources indicated by the indication signaling to carry out SL transmission.

It should be noted that, here, the negotiation may be a unidirectional notification or a bidirectional negotiation, where the first terminal and the second terminal negotiate whether the second terminal can directly select transmission resources from the resources indicated by the indication signaling to perform SL transmission, so that the first terminal determines how to determine recommended resources, and the second terminal determines how to perform resource selection.

Optionally, whether the second terminal can directly select transmission resources from the resources indicated by the indication signaling for SL transmission is configured or preconfigured according to a resource set (per pool/per BWP/per band/per CC/per RB set).

Optionally, the upper time limit required for the second terminal to prepare the side link SL physical side link control channel PSCCH/psch satisfies one of the following:

a) The same upper limit as the first PUSCH preparation time;

the calculation method of the first PUSCH preparation time upper limit refers to TS38.214 6.4.4, wherein the d value can be set to a preset value, and the d value can be 0.

When the gcb schedules PUSCH, the time interval between PDCCH and PUSCH may be determined based on PUSCH preparation time of the UE. In section TS38.214 6.4.4, PUSCH preparation time is determined based on at least a preset N2 value and d value (d values include d_2,1, and d_2, 2). Wherein, the N2 value is as follows for the high performance UE and the low performance UE respectively:

Table 6.4-1:PUSCH preparation time for PUSCH timing capability 1

μ	PUSCH preparation time N2[symbols]
		0	10
1	12
		2	23
3	36

Table 6.4-2:PUSCH preparation time for PUSCH timing capability 2

μ	PUSCH preparation time N2[symbols]
		0	5
1	5.5
		2	11 for frequency range 1

b) The sum of the upper time limit required by the second terminal for preparing the SL PSCCH/PSSCH and the upper time limit required by the second terminal for demodulating the indication signaling is the same as the upper time limit of the first PUSCH preparation;

c) Taking the upper limit of the first PUSCH preparation time as a reference, and rounding up to a preset time unit (such as slot);

d) The same upper limit as the first PSSCH preparation time;

when the gNB schedules the PSSCH, a time interval between the PDCCH and the PSSCH is determined based on PSSCH preparation time of the UE. In section TS38.214 8.6.6, PSSCH preparation time is determined based on at least a preset N2 value and d value (d value includes d_2,1, where d_2, 1=1). Wherein, the N2 value is as follows:

Table 8.6-1:PSSCH preparation time

μ	PSSCH preparation time N ₂ [symbols]
		0	10
1	12
		2	23
3	36

e) The sum of the upper time limit required by the second terminal for preparing the SL PSCCH/PSSCH and the upper time limit required by the second terminal for demodulating the indication signaling is the same as the upper time limit of the first PSSCH preparation;

f) Taking the upper limit of the first PSSCH preparation time as a reference, and rounding up to a preset time unit;

g) The sum of the upper time limit required by the second terminal for preparing the SL PSCCH/PSSCH and the upper time limit required by the second terminal for demodulating the indication signaling is rounded up to a preset time unit by taking the upper time limit of the first PSSCH preparation as a reference;

h) The upper time limit required for the second terminal to prepare the SL PSCCH/PSSCH is protocol agreed or configured or preconfigured;

i) And determining according to the time for preparing the TB by the second terminal.

The time for the second terminal to prepare the TB may be specified, and then the PSCCH/pscsch preparation time of the second terminal may be further shortened (e.g., the second terminal prepares the TB before decoding the indication information, and the second terminal may directly map the TB to physical resources after decoding the resource indication information of the first terminal).

Wherein the time when the second terminal sends a request (request) to the first terminal is defined as the time when the second terminal prepares a TB.

The time when the second terminal receives feedback information (e.g., HARQ feedback of request signaling, feedback information associated with the request information) of the first terminal may also be defined as the time when the second terminal prepares a TB. The first terminal sends signaling to the second terminal to instruct the second terminal to prepare the TB, and the second terminal demodulates the signaling to prepare the TB.

Optionally, in the case that the first condition is met, the first terminal or the second terminal sends an indication signaling or performs information demodulation according to the time interval or the minimum time interval;

wherein the first condition includes at least one of:

the first terminal or the second terminal transmits on an unlicensed spectrum;

the second terminal performs COT transmission based on sharing, and the first terminal shares COT to the second terminal;

the first terminal sends indication signaling to the second terminal by using side chain control information SCI format n;

the second terminal directly selects transmission resources from the resources indicated by the indication signaling to carry out SL transmission;

the first terminal negotiates with the second terminal to send indication signaling or conduct information demodulation according to the time interval or the minimum time interval;

Configured or preconfigured in terms of resource sets.

For example, the UE-a (i.e. first terminal)/UE-B (second terminal) assumes the shortened (minimum) time interval if at least one of the following conditions is fulfilled:

UE-B/UE-a transmits at unlicensed spectrum (including at least transmission at 5GHz unlicensed spectrum specified by the regulation), and UE-B/UE-a performs information indication/information demodulation at the (minimum) time interval described above;

the UE-B performs COT sharing transmission, and when the UE-A shares COT to the UE-B, the UE-B/UE-A performs information indication/information demodulation according to the (minimum) time interval;

the UE-A and the UE-B negotiate whether to transmit based on COT sharing;

when the UE-A uses SCI format n to inform recommended resources, the UE-A/UE-B performs information indication/information demodulation according to the (minimum) time interval;

the UE-B directly selects transmission resources from the resources indicated by the indication information, and the UE-A/UE-B carries out information indication/information demodulation according to the (minimum) time interval;

negotiating (which may be unidirectional notification or bidirectional negotiation) between UE-a and UE-B, whether UE-a/UE-B performs information indication/information demodulation at the (minimum) time interval;

the UE-a/UE-B performs information indication/information demodulation at the (minimum) time interval described above, and is configured/preconfigured by a resource set (per pool/per BWP/per band/per CC/per RB set).

In the embodiment of the application, the terminal can better realize SL COT sharing by shortening the time interval between the transmission resource and the recommended resource of the indication signaling, and the service scene of COT sharing is expanded.

On the basis of the above embodiments, the method further includes:

the first terminal selects the recommended resources and the transmission resources of the indication signaling.

It may be appreciated that, in order to achieve the COT sharing, the first terminal selects recommended resources and transmission resources of the indication signaling. It should be noted that, the indication signaling may be transmitted on the same resource as the data, and selecting the transmission resource of the indication signaling may be understood as selecting the corresponding data transmission resource.

The first terminal selects the recommended resource and the transmission resource of the indication signaling, and the transmission resource comprises at least one of the following components:

1) The first terminal selects a plurality of resources within a first COT length, wherein a part of the plurality of resources are used for carrying indication signaling, and a part of the plurality of resources are recommended resources;

optionally, the first terminal selects a plurality of resources within a first COT length, including at least one of:

a) The Media Access Control (MAC) layer of the first terminal selects a plurality of resources in the same COT from the alternative resource set;

For example, the first resource may be selected randomly or according to a preset rule, and when other resources are selected, the resources within the same COT as the other selected resources are (preferably) selected.

For another example, among the alternative resources reported by the PHY layer, a plurality of alternative resources (the number approaches the number of resources to be selected by the MAC layer) are located in the same COT, and then these alternative resources are (preferentially) selected.

b) At least part of the alternative resources in the alternative resource set reported to the MAC layer by the physical PHY layer of the first terminal are positioned in the same COT;

for example, when the PHY layer performs resource exclusion, a plurality of alternative resources (the number may be indicated by the MAC layer) are guaranteed to remain in a certain COT length.

For another example, when the PHY layer performs resource exclusion, it is guaranteed that a plurality of alternative resources (the number may be indicated by the MAC layer) remain in the COT length, and the number of such cobs is greater than or not less than x, or the ratio of such cobs to the total number of cobs in the resource selection window (as shown in fig. 4) is greater than or not less than x%. Fig. 4 is a schematic diagram of resource selection provided in an embodiment of the present application.

c) When the PHY layer of the first terminal reports the alternative resource set to the MAC layer, reporting the alternative resource in the same COT;

d) The transmission resource of the indication signaling is the resource(s) located earlier in the first COT;

e) The recommended resource is located after the transmission resource of the indication signaling, and a time interval between the transmission resource of the indication signaling and the recommended resource is greater than the minimum time interval.

2) The first terminal firstly selects the recommended resources and then selects the transmission resources of the indication signaling, so that the transmission resources of the indication signaling and at least one recommended resource are both in the first COT and meet the time interval or minimum time interval requirement;

optionally, the first terminal first selects the recommended resource and then selects the transmission resource of the indication signaling, including:

the MAC layer of the first terminal selects a first resource as a transmission resource of the indication signaling, wherein the first resource and the recommended resource are in the same COT.

Optionally, in the case that the first terminal selects the recommended resource first and then selects the transmission resource of the indication signaling, a distance between a start position of a resource selection window of the transmission resource of the indication signaling and a first recommended resource is smaller than a length of the first COT, where the first recommended resource includes one of: all recommended resources, part recommended resources, at least one recommended resource, and the first N recommended resources.

Optionally, in the case that the first terminal selects the recommended resource first and then selects the transmission resource of the indication signaling, a distance between an end position of a resource selection window of the transmission resource of the indication signaling and a first recommended resource is greater than the minimum time interval, where the first recommended resource includes one of: all recommended resources, part recommended resources, at least one recommended resource, and the first N recommended resources.

3) The first terminal firstly selects the transmission resource of the indication signaling and then selects the recommended resource, so that the transmission resource of the indication signaling and at least one recommended resource are both in the first COT and meet the time interval or minimum time interval requirement;

optionally, the first terminal first selects the transmission resource of the indication signaling, and then selects the recommended resource, including:

the MAC layer of the first terminal selects a first resource as a recommended resource, where the first resource and a transmission resource of the indication signaling are in the same COT.

Optionally, in the case that the first terminal selects the transmission resource of the indication signaling first and then selects the recommended resource, a distance between an end position of a resource selection window of the recommended resource and the transmission resource of the first indication signaling is smaller than a length of the first COT, where the transmission resource of the first indication signaling includes one of: all transmission resources of the indication signaling, part of the transmission resources of the indication signaling, at least one transmission resource of the indication signaling, and the last N transmission resources of the indication signaling.

Optionally, in the case that the first terminal selects the transmission resource of the indication signaling first and then selects the recommended resource, a distance between a start position of a resource selection window of the recommended resource and the transmission resource of the first indication signaling is greater than the minimum time interval, where the transmission resource of the first indication signaling includes one of: all transmission resources of the indication signaling, part of the transmission resources of the indication signaling, at least one transmission resource of the indication signaling, and the last N transmission resources of the indication signaling.

It should be noted that in the embodiment of the present application, it may be assumed that the MAC layer triggers the first terminal to select the indication signaling transmission resource and the recommended resource at the same time.

4) The first terminal determines the number of transmission resources and the number of recommended resources within a first COT.

Optionally, the first terminal determines the number of transmission resources and the number of recommended resources in the first COT, including at least one of the following:

a) The first terminal determines the quantity of the transmission resources and the quantity of the recommended resources in a first COT according to the implementation of the first terminal;

b) The first terminal determines the quantity of the transmission resources and the quantity of the recommended resources in a first COT according to TBS of the TB to be transmitted;

c) The first terminal determines the quantity of the transmission resources in a first COT according to a first ratio configured by a system, and takes other resources in the first COT as recommended resources;

for example, the system configures a percentage of X%, and once LBT is successful, the first terminal itself uses (least/most) X% of the resources, and the remaining resources can be shared with other UEs.

d) The first terminal determines the quantity of the recommended resources according to a second ratio of system configuration;

for example, the system configures a percentage Y%, and once LBT is successful, UE-A takes up the resources (least/most) of the share to other UEs by Y%.

e) The first terminal adjusts the number of recommended resources according to the number of received data from other terminals or according to the success rate of demodulating the data from other terminals.

The first terminal adjusts the proportion of resources of share to other UE according to the quantity of received data from other terminals or according to the success rate of demodulating the data from other terminals.

For example, no data is received from other UEs for a period of time, or the received data is very small, or the received data is frequently misinterpreted, which means that the LBT failure probability of the other UEs is high, and share COT is required for the other UEs.

Optionally, the length of the first COT is determined according to at least one of:

priority information indicating signaling;

and the notification information of the second terminal is used for notifying priority information or COT length of the indication signaling.

In one embodiment, the length of the first COT is determined according to priority information of the indication signaling, where the priority information of the indication signaling includes L1 priority, PQI, CAPC, and the like. The priority information indicating the signaling is agreed or configured or preconfigured by the protocol.

In one embodiment, the length of the first COT is determined according to the notification information of the second terminal.

For example, the second terminal informs the first terminal of the transmitted priority information, and the first terminal determines the length of the first COT according to the priority information.

For example, the second terminal directly informs the length of the first COT.

In some alternative embodiments, the first terminal may also autonomously determine the length of the first COT and notify the second terminal of the first COT length or associated priority information.

In the embodiment of the present application, by making the transmission resource of the indication signaling and the recommended resource in the same COT, shortening the time interval between the transmission resource of the indication signaling and the recommended resource, the terminal may better implement SL COT sharing, and expand the usage scenario of COT sharing.

Fig. 5 is a second flow chart of a side-channel occupation time COT sharing method according to an embodiment of the present application. As shown in fig. 5, the side link channel occupation time COT sharing method includes:

step 500, the second terminal receives an indication signaling sent by the first terminal, where the indication signaling is used to indicate recommended resources, and transmission resources of the indication signaling and the recommended resources are in the same COT.

Optionally, the length of the time interval or minimum time interval is associated with a processing capability level of the terminal.

Optionally, the length of the time interval or minimum time interval is associated with a subcarrier spacing SCS.

Optionally, the receiving, by the second terminal, the indication signaling sent by the first terminal includes: the second terminal receives the indication signaling sent by the first terminal by using a side chain control information format SCI format n.

Optionally, the method further comprises: the second terminal and the first terminal negotiate to determine the capability of the second terminal to demodulate the SCI format n.

Optionally, the capability of the second terminal to demodulate the SCI format n is configured or preconfigured by a resource set.

Optionally, when the second terminal directly selects a transmission resource from the resources indicated by the indication signaling to perform SL transmission after demodulating the indication signaling, the time for the second terminal to collect the sensing result, the time for preparing the resource selection, and the time required for preparing the SL PSCCH/PSSCH are preset values.

Optionally, the method further comprises: the second terminal and the first terminal negotiate whether the second terminal can directly select transmission resources from the resources indicated by the indication signaling to carry out SL transmission.

Optionally, whether the second terminal can directly select transmission resources from the resources indicated by the indication signaling to perform SL transmission is configured or preconfigured according to a resource set.

the same upper limit as the first PUSCH preparation time;

the sum of the upper time limit required by the second terminal for preparing the SL PSCCH/PSSCH and the upper time limit required by the second terminal for demodulating the indication signaling is the same as the upper time limit of the first PUSCH preparation;

taking the upper limit of the first PUSCH preparation time as a reference, and rounding up to a preset time unit;

the same upper limit as the first PSSCH preparation time;

the sum of the upper time limit required by the second terminal for preparing the SL PSCCH/PSSCH and the upper time limit required by the second terminal for demodulating the indication signaling is the same as the upper time limit of the first PSSCH preparation;

taking the upper limit of the first PSSCH preparation time as a reference, and rounding up to a preset time unit;

The sum of the upper time limit required by the second terminal for preparing the SL PSCCH/PSSCH and the upper time limit required by the second terminal for demodulating the indication signaling is rounded up to a preset time unit by taking the upper time limit of the first PSSCH preparation as a reference;

the upper time limit required for the second terminal to prepare the SL PSCCH/PSSCH is protocol agreed or configured or preconfigured;

and determining according to the time for preparing the TB by the second terminal.

wherein the first condition includes at least one of:

the first terminal or the second terminal transmits on an unlicensed spectrum;

Configured or preconfigured in terms of resource sets.

The sharing method of the side link channel occupation time COT of the second terminal side and the sharing method of the side link channel occupation time COT of the first terminal side provided in this embodiment belong to the same inventive concept, so for the related concepts and descriptions in this embodiment, reference may be made to the foregoing sharing method of the side link channel occupation time COT of the first terminal side, which is not described herein again.

According to the side link channel occupation time COT sharing method provided by the embodiment of the application, the execution body can be the side link channel occupation time COT sharing device. In the embodiment of the present application, a method for performing side link channel occupation time COT sharing by a side link channel occupation time COT sharing device is taken as an example, which illustrates the side link channel occupation time COT sharing device provided in the embodiment of the present application.

Fig. 6 is a schematic structural diagram of a side link channel occupation time COT sharing apparatus according to an embodiment of the present application, as shown in fig. 6, the side link channel occupation time COT sharing apparatus 600 includes:

A first sending unit 610, configured to send an indication signaling to the second terminal, where the indication signaling is used to indicate recommended resources, and a transmission resource of the indication signaling and the recommended resources are in the same COT.

Optionally, the apparatus further comprises:

a first negotiation unit, configured to negotiate with a second terminal to determine a capability of the second terminal to demodulate the SCI format n.

Optionally, the capability of demodulating the SCI format n is configured or preconfigured per resource set.

Optionally, the apparatus further comprises:

and the second negotiation unit is used for negotiating with the second terminal whether the second terminal can directly select transmission resources from the resources indicated by the indication signaling to carry out SL transmission.

the same upper limit as the first PUSCH preparation time;

the same upper limit as the first PSSCH preparation time;

wherein the first condition includes at least one of:

the first terminal or the second terminal transmits on an unlicensed spectrum;

Configured or preconfigured in terms of resource sets.

Optionally, the apparatus further comprises:

a first selection unit, configured to select the recommended resource and the transmission resource of the indication signaling;

wherein said selecting said recommended resources and said transmission resources of said indication signaling comprises at least one of:

the first terminal selects a plurality of resources within a first COT length, wherein a part of the plurality of resources are used for carrying indication signaling, and a part of the plurality of resources are recommended resources;

the first terminal firstly selects the recommended resources and then selects the transmission resources of the indication signaling, so that the transmission resources of the indication signaling and at least one recommended resource are both in the first COT and meet the time interval or minimum time interval requirement;

the first terminal firstly selects the transmission resource of the indication signaling and then selects the recommended resource, so that the transmission resource of the indication signaling and at least one recommended resource are both in the first COT and meet the time interval or minimum time interval requirement;

The first terminal determines the number of transmission resources and the number of recommended resources within a first COT.

Optionally, the selecting a plurality of resources within the first COT length includes at least one of:

the Media Access Control (MAC) layer of the first terminal selects a plurality of resources in the same COT from the alternative resource set;

at least part of the alternative resources in the alternative resource set reported to the MAC layer by the physical PHY layer of the first terminal are positioned in the same COT;

when the PHY layer of the first terminal reports the alternative resource set to the MAC layer, reporting the alternative resource in the same COT;

the transmission resource of the indication signaling is the resource(s) located earlier in the first COT;

the recommended resource is located after the transmission resource of the indication signaling, and a time interval between the transmission resource of the indication signaling and the recommended resource is greater than the minimum time interval.

Optionally, the selecting the recommended resource first and then selecting the transmission resource of the indication signaling includes:

priority information indicating signaling;

Optionally, the determining the number of transmission resources and the number of recommended resources in the first COT includes at least one of:

determining the number of the transmission resources and the number of the recommended resources in a first COT according to the implementation of the first terminal;

determining the number of transmission resources and the number of recommended resources in a first COT according to TBS of a TB to be transmitted;

determining the quantity of the transmission resources in a first COT according to a first ratio of system configuration, and taking other resources in the first COT as recommended resources;

determining the quantity of the recommended resources according to a second ratio of system configuration;

and adjusting the quantity of the recommended resources according to the quantity of the received data from other terminals or according to the success rate of demodulating the data from other terminals.

The side link channel occupation time COT sharing device in the embodiment of the present 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.

The side-chain channel occupation time COT sharing device provided in the embodiment of the present application can implement each process implemented by the method embodiments of fig. 3 to fig. 4, and achieve the same technical effects, so that repetition is avoided, and no further description is given here.

Fig. 7 is a second schematic structural diagram of a side-link channel occupation time COT sharing apparatus according to an embodiment of the present application. As shown in fig. 7, the side chain channel occupation time COT sharing apparatus 700 includes:

the first receiving unit 710 is configured to receive an indication signaling sent by the first terminal, where the indication signaling is used to indicate recommended resources, and a transmission resource of the indication signaling and the recommended resources are in the same COT.

Optionally, the apparatus further comprises:

And a third negotiation unit, configured to negotiate with the first terminal to determine the capability of the second terminal to demodulate the SCI format n.

Optionally, the apparatus further comprises:

and a fourth negotiation unit, configured to negotiate with the first terminal whether the second terminal can directly select transmission resources from the resources indicated by the indication signaling to perform SL transmission.

the same upper limit as the first PUSCH preparation time;

the same upper limit as the first PSSCH preparation time;

wherein the first condition includes at least one of:

the first terminal or the second terminal transmits on an unlicensed spectrum;

configured or preconfigured in terms of resource sets.

The side link channel occupation time COT sharing device provided in the embodiment of the present application can implement each process implemented by the method embodiment of fig. 5, and achieve the same technical effect, so that repetition is avoided, and no further description is provided here.

Optionally, as shown in fig. 8, the embodiment of the present application further provides a communication device 800, including a processor 801 and a memory 802, where a program or an instruction that can be executed on the processor 801 is stored in the memory 802, for example, when the communication device 800 is a terminal, the program or the instruction is executed by the processor 801 to implement each step of the above-mentioned side link channel occupation time COT sharing method embodiment, and the same technical effects can be achieved, so that repetition is avoided, and no redundant description is provided herein.

The embodiment of the application also provides a terminal, which comprises a processor and a communication interface, wherein the communication interface is used for sending an indication signaling to the second terminal, and the indication signaling is used for indicating recommended resources. The terminal embodiment corresponds to the terminal-side method embodiment, and each implementation process and implementation manner of the method embodiment can be applied to the terminal embodiment, and the same technical effects can be achieved.

The embodiment of the application also provides a terminal, which comprises a processor and a communication interface, wherein the communication interface is used for receiving the indication signaling sent by the first terminal, and the indication signaling is used for indicating recommended resources. The terminal embodiment corresponds to the terminal-side method embodiment, and each implementation process and implementation manner of the method embodiment can be applied to the terminal embodiment, and the same technical effects can be achieved.

Specifically, fig. 9 is a schematic hardware structure of a terminal for implementing an embodiment of the present application.

The terminal 900 includes, but is not limited to: at least some of the components of the radio frequency unit 901, the network module 902, the audio output unit 903, the input unit 904, the sensor 905, the display unit 906, the user input unit 907, the interface unit 908, the memory 909, and the processor 910, etc.

Those skilled in the art will appreciate that the terminal 900 may further include a power source (e.g., a battery) for powering the various components, and the power source may be logically coupled to the processor 910 by a power management system so as to perform functions such as managing charging, discharging, and power consumption by the power management system. The terminal structure shown in fig. 9 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 904 may include a graphics processing unit (Graphics Processing Unit, GPU) 9041 and a microphone 9042, with the graphics processor 9041 processing image data of still pictures or video obtained by an image capture device (e.g., a camera) in a video capture mode or an image capture mode. The display unit 906 may include a display panel 9061, and the display panel 9061 may be configured in the form of a liquid crystal display, an organic light emitting diode, or the like. The user input unit 907 includes at least one of a touch panel 9071 and other input devices 9072. Touch panel 9071, also referred to as a touch screen. The touch panel 9071 may include two parts, a touch detection device and a touch controller. Other input devices 9072 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 a network side device, the radio frequency unit 901 may transmit the downlink data to the processor 910 for processing; in addition, the radio frequency unit 901 may send uplink data to the network side device. Typically, the radio frequency unit 901 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 909 may be used to store software programs or instructions as well as various data. The memory 909 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 909 may include volatile memory or nonvolatile memory, or the memory x09 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 909 in embodiments of the present application includes, but is not limited to, these and any other suitable types of memory.

Processor 910 may include one or more processing units; optionally, the processor 910 integrates an application processor that primarily processes operations involving an operating system, user interface, application programs, etc., and a modem processor that primarily processes 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 910.

The radio frequency unit 901 is configured to send an indication signaling to the second terminal, where the indication signaling is used to indicate recommended resources.

Optionally, the radio frequency unit 901 is configured to: and sending indication signaling to the second terminal by using a side chain control information format SCI format n.

Optionally, the processor 910 is configured to: and the second terminal negotiates and determines the capability of the second terminal to demodulate the SCI format n.

Optionally, the processor 910 is further configured to:

and the second terminal negotiates whether the second terminal can directly select transmission resources from the resources indicated by the indication signaling to carry out SL transmission.

the same upper limit as the first PUSCH preparation time;

the same upper limit as the first PSSCH preparation time;

wherein the first condition includes at least one of:

the first terminal or the second terminal transmits on an unlicensed spectrum;

Configured or preconfigured in terms of resource sets.

Optionally, the processor 910 is further configured to: selecting the recommended resources and the transmission resources of the indication signaling;

Optionally, the selecting the transmission resource of the indication signaling and then selecting the recommended resource include:

priority information indicating signaling;

In some optional embodiments, the radio frequency unit 901 is configured to receive an indication signaling sent by the first terminal, where the indication signaling is used to indicate recommended resources.

Optionally, the radio frequency unit 901 is configured to: and receiving an indication signaling sent by the first terminal by using a side chain control information format SCI format n.

Optionally, the processor 910 is configured to:

and the first terminal negotiates and determines the capability of the second terminal to demodulate the SCI format n.

Optionally, when the second terminal directly selects a transmission resource from the resources indicated by the indication signaling for SL transmission after demodulating the indication signaling, the time for the second terminal to collect the sensing result, the time for preparing the resource selection, and the time required for preparing the slpch/PSSCH are preset values.

Optionally, the processor 910 is configured to:

and the first terminal negotiates whether the second terminal can directly select transmission resources from the resources indicated by the indication signaling to carry out SL transmission.

the same upper limit as the first PUSCH preparation time;

the same upper limit as the first PSSCH preparation time;

wherein the first condition includes at least one of:

the first terminal or the second terminal transmits on an unlicensed spectrum;

configured or preconfigured in terms of resource sets.

In the embodiment of the application, by shortening the time interval between the transmission resource and the recommended resource of the indication signaling, the terminal can better realize SLCOT sharing and expand the use scene of COT sharing.

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 processes of the above-mentioned side-chain channel occupation time COT sharing method embodiment are implemented, and the same technical effects can be achieved, so that repetition is avoided, and no redundant description is provided herein.

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, the chip includes a processor and a communication interface, the communication interface is coupled with the processor, the processor is configured to run a program or an instruction, implement each process of the above side chain channel occupation time COT sharing method embodiment, and achieve the same technical effect, so that repetition is avoided, and no further description is provided 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 each process of the above-mentioned side link channel occupation time COT sharing method embodiment, and the same technical effects can be achieved, so that repetition is avoided, and no further description is given here.

The embodiment of the application also provides a communication system, which comprises: the method comprises the steps of a first terminal and a second terminal, wherein the first terminal can be used for executing the steps of the method for sharing the COT of the side link channel occupation time, and the second terminal can be used for executing the steps of the method for sharing the COT of the side link channel occupation time.

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. The utility model provides a side link channel occupation time COT sharing method which is characterized by comprising the following steps:

2. The method of claim 1, wherein a length of a time interval or minimum time interval between the transmission resource of the indication signaling and the recommended resource comprises at least one of:

3. The method according to claim 2, characterized in that the length of the time interval or minimum time interval is associated with the processing capability level of the terminal.

4. The method according to claim 2, characterized in that the length of the time interval or minimum time interval is associated with a subcarrier spacing SCS.

5. The method of claim 2, wherein the length of the time interval or minimum time interval is agreed, configured or preconfigured by a protocol, or wherein at least one of the components of the length of the time interval or minimum time interval is agreed, configured or preconfigured by a protocol.

6. The method according to any of claims 1-5, wherein the first terminal sending indication signaling to the second terminal comprises: the first terminal sends an indication signaling to the second terminal by using a side link control information format SCI format n.

7. The method of claim 6, wherein the method further comprises: the first terminal and the second terminal negotiate to determine the capability of the second terminal to demodulate the SCI format n.

8. The method of claim 6, wherein the capability of the second terminal to demodulate the SCI format n is configured or preconfigured per resource set.

9. The method of claim 6 wherein the SCI format n is transmitted with a transport block TB and/or a corresponding PSCCH/PSSCH resource selection is triggered by a Padding TB to transmit the SCI format n.

10. The method according to claim 2, wherein in the case where the second terminal directly selects transmission resources from the resources indicated by the indication signaling for SL transmission after demodulating the indication signaling, a time for the second terminal to collect a sensing result and a time for preparation for resource selection are preset values.

11. The method according to claim 2, wherein in case that the second terminal selects transmission resources for SL transmission directly from the resources indicated by the indication signaling after demodulating the indication signaling, the time for which the second terminal collects the sensing result, the time for preparation of the resource selection, and the time required for preparation of the SL PSCCH/PSSCH are preset values.

12. The method according to claim 10 or 11, characterized in that the method further comprises: the first terminal and the second terminal negotiate whether the second terminal can directly select transmission resources from the resources indicated by the indication signaling to carry out SL transmission.

13. A method according to claim 10 or 11, characterized in that whether the second terminal can select transmission resources for SL transmission directly from the resources indicated by the indication signalling is configured or preconfigured according to the set of resources.

14. The method of claim 2, wherein the second terminal prepares a side link SL physical side link control channel PSCCH/PSSCH for a time upper bound that satisfies one of:

the same upper limit as the first PUSCH preparation time;

the same upper limit as the first PSSCH preparation time;

15. Method according to claim 2, characterized in that in case a first condition is fulfilled, the first terminal or the second terminal sends an indication signaling or performs information demodulation at the time interval or minimum time interval;

wherein the first condition includes at least one of:

the first terminal or the second terminal transmits on an unlicensed spectrum;

configured or preconfigured in terms of resource sets.

16. The method according to any one of claims 1-15, further comprising:

the first terminal selects the recommended resources and the transmission resources of the indication signaling;

17. The method of claim 16, wherein the first terminal selects a plurality of resources within a first COT length, comprising at least one of:

18. The method of claim 16, wherein the first terminal first selects the recommended resource and then selects the transmission resource of the indication signaling, comprising:

19. The method according to claim 16, wherein in case the first terminal selects the recommended resource first and then selects the transmission resource of the indication signaling, a distance between a start position of a resource selection window of the transmission resource of the indication signaling and a first recommended resource is smaller than a length of the first COT, wherein the first recommended resource comprises one of: all recommended resources, part recommended resources, at least one recommended resource, and the first N recommended resources.

20. The method according to claim 16, wherein in case the first terminal selects the recommended resource first and then selects the transmission resource of the indication signaling, an end position of a resource selection window of the transmission resource of the indication signaling is spaced apart from a first recommended resource by more than the minimum time interval, wherein the first recommended resource comprises one of: all recommended resources, part recommended resources, at least one recommended resource, and the first N recommended resources.

21. The method of claim 16, wherein the first terminal first selects the transmission resource of the indication signaling and then selects the recommended resource, comprising:

22. The method according to claim 16, wherein in case the first terminal selects the transmission resource of the indication signaling first and then selects the recommended resource, a starting position of a resource selection window of the recommended resource is spaced apart from the transmission resource of the first indication signaling by more than the minimum time interval, wherein the transmission resource of the first indication signaling comprises one of: all transmission resources of the indication signaling, part of the transmission resources of the indication signaling, at least one transmission resource of the indication signaling, and the last N transmission resources of the indication signaling.

23. The method of claim 16, wherein in the case where the first terminal selects the transmission resource of the indication signaling first and then selects the recommended resource, a distance between an end position of a resource selection window of the recommended resource and the transmission resource of the first indication signaling is smaller than a length of the first COT, wherein the transmission resource of the first indication signaling includes one of: all transmission resources of the indication signaling, part of the transmission resources of the indication signaling, at least one transmission resource of the indication signaling, and the last N transmission resources of the indication signaling.

24. The method of any one of claims 16-23, wherein the length of the first COT is determined according to at least one of:

priority information indicating signaling;

25. The method of claim 16, wherein the first terminal determining the number of transmission resources and the number of recommended resources within a first COT comprises at least one of:

the first terminal determines the quantity of the transmission resources and the quantity of the recommended resources in a first COT according to the implementation of the first terminal;

the first terminal determines the quantity of the transmission resources and the quantity of the recommended resources in a first COT according to TBS of the TB to be transmitted;

the first terminal determines the quantity of the transmission resources in a first COT according to a first ratio configured by a system, and takes other resources in the first COT as recommended resources;

the first terminal determines the quantity of the recommended resources according to a second ratio of system configuration;

the first terminal adjusts the number of recommended resources according to the number of received data from other terminals or according to the success rate of demodulating the data from other terminals.

26. The utility model provides a side link channel occupation time COT sharing method which is characterized by comprising the following steps:

27. The method of claim 26, wherein a length of a time interval or minimum time interval between the transmission resource of the indication signaling and the recommended resource comprises at least one of:

28. The method of claim 27, wherein a length of the time interval or minimum time interval is associated with a processing capability level of the terminal.

29. The method according to claim 27, characterized in that the length of the time interval or minimum time interval is associated with a subcarrier spacing SCS.

30. The method of claim 27, wherein the length of the time interval or minimum time interval is agreed, configured or preconfigured by a protocol, or wherein at least one of the components of the length of the time interval or minimum time interval is agreed, configured or preconfigured by a protocol.

31. The method of claim 27, wherein the second terminal receiving the indication signaling sent by the first terminal comprises: the second terminal receives the indication signaling sent by the first terminal by using a side chain control information format SCI format n.

32. The method of claim 31, further comprising: the second terminal and the first terminal negotiate to determine the capability of the second terminal to demodulate the SCI format n.

33. The method of claim 31, wherein the capability of the second terminal to demodulate the SCI format n is configured or pre-configured in a resource set.

34. The method of claim 31, wherein the SCI format n is transmitted with a transport block TB and/or wherein a corresponding PSCCH/PSSCH resource selection is triggered by a Padding TB to transmit the SCI format n.

35. The method according to claim 27, wherein in the case where the second terminal directly selects transmission resources from the resources indicated by the indication signaling for SL transmission after demodulating the indication signaling, the time for the second terminal to collect the sensing result and the time for preparation for resource selection are preset values.

36. The method of claim 27, wherein in the case where the second terminal selects transmission resources for SL transmission directly from the resources indicated by the indication signaling after demodulating the indication signaling, a time for which the second terminal collects a sensing result, a time for preparation of resource selection, and a time required for preparation of a SL PSCCH/PSSCH are preset values.

37. The method according to claim 35 or 36, characterized in that the method further comprises: the second terminal and the first terminal negotiate whether the second terminal can directly select transmission resources from the resources indicated by the indication signaling to carry out SL transmission.

38. A method according to claim 35 or 36, characterized in that whether the second terminal can select transmission resources for SL transmission directly from the resources indicated by the indication signalling is configured or preconfigured according to the set of resources.

39. The method of claim 27 wherein the upper time limit required for the second terminal to prepare the side link SL physical side link control channel PSCCH/PSSCH satisfies one of:

the same upper limit as the first PUSCH preparation time;

the same upper limit as the first PSSCH preparation time;

40. The method according to claim 27, wherein the first terminal or the second terminal transmits an indication signaling or performs information demodulation at the time interval or the minimum time interval in case that the first condition is satisfied;

wherein the first condition includes at least one of:

the first terminal or the second terminal transmits on an unlicensed spectrum;

configured or preconfigured in terms of resource sets.

41. A side link channel occupation time COT sharing apparatus, comprising:

42. A side-link channel occupation time COT sharing device is characterized in that,

43. 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 side link channel occupation time COT sharing method according to any one of claims 1 to 25, or the steps of the side link channel occupation time COT sharing method according to any one of claims 26 to 40.

44. A readable storage medium, wherein a program or an instruction is stored on the readable storage medium, the program or the instruction, when executed by a processor, implementing the side link channel occupation time COT sharing method according to any one of claims 1 to 25, or implementing the steps of the side link channel occupation time COT sharing method according to any one of claims 26 to 40.