WO2023207415A1

WO2023207415A1 - Data transmission method, apparatus and system

Info

Publication number: WO2023207415A1
Application number: PCT/CN2023/082285
Authority: WO
Inventors: 齐鸿; 杨子豪; 苏宏家; 卢磊
Original assignee: 华为技术有限公司
Priority date: 2022-04-28
Filing date: 2023-03-17
Publication date: 2023-11-02
Also published as: CN117014943A

Abstract

A data transmission method, apparatus and system. The method comprises: a first terminal device receives first information from a second terminal device, and receives second information from a third terminal device. The first information indicates a resource reserved by the second terminal device, and the resource comprises a first resource for the first terminal device to receive first data from the second terminal device. The second information is used for sharing a first channel occupancy time (COT) with the first terminal device, a time-frequency resource in the first COT comprises a second resource, and time-domain positions of the second resource and the first resource overlap. That is, the first terminal device should receive data on the first resource and transmit data on the second resource, and the first terminal device may transmit second data to the third terminal device on the second resource. On the basis of the solution, the risk of losing the first COT of the third terminal device can be lowered, data transmission of the third terminal device is ensured as much as possible, and for a service, the quality of service is guaranteed.

Description

Data transmission method, device and system

This application claims priority to the Chinese patent application submitted to the State Intellectual Property Office on April 28, 2022, with application number 202210461778.7 and the application name "Data transmission method, device and system", the entire content of which is incorporated into this application by reference. middle.

Technical field

Embodiments of the present application relate to the field of communications, and in particular, to data sending methods, devices and systems.

Background technique

In wireless communication systems, the frequency bands used by communication equipment can be divided into licensed frequency bands and unlicensed frequency bands. In the authorized frequency band, communication equipment uses spectrum resources based on the scheduling of the central node. In unlicensed frequency bands, communication devices compete for channels through the listen before talk (LBT) mechanism.

The LBT mechanism is a channel access rule based on random backoff. A communication device needs to sense whether the channel is idle before accessing the channel and starting to send data. If the channel remains idle for a period of time, it can occupy the channel and send data in the channel. Among them, the length of time the channel is occupied is called channel occupancy time (COT).

In the new radio (NR) (NR-U) system under unlicensed spectrum, the LBT mechanism supports COT sharing, that is, after the communication device obtains the COT through LBT, it can share the unlicensed spectrum in the COT with other communication devices. resource. In the COT sharing mechanism of NR-U, the unlicensed spectrum resources shared within the COT can be scheduled by the base station.

However, in the sidelink (SL) (SL-U) scenario under unlicensed spectrum, the base station may not participate in resource allocation and scheduling. At this time, COT sharing between terminal equipment may cause The quality of business services is reduced.

Contents of the invention

This application provides a data sending method, device and system that can reduce the risk of losing COT for terminal equipment that shares COT with other UEs, try to ensure data transmission of the terminal equipment, and ensure business service quality.

In a first aspect, a data sending method is provided, which method can be executed by a first terminal device, or can be executed by a component of the first terminal device, such as a processor, a chip, or a chip system of the first terminal device, and further It can be implemented by a logic module or software that can realize all or part of the functions of the first terminal device. The method includes: a first terminal device receiving first information from a second terminal device, and receiving second information from a third terminal device. Wherein, the first information indicates resources reserved by the second terminal device, the reserved resources include first resources, and the first resources are used by the first terminal device to receive the first data from the second terminal device. The second information is used to share the first COT with the first terminal device, the time-frequency resources in the first COT include the second resource, and the time domain positions of the second resource and the first resource overlap. That is, the first terminal device should receive data on the first resource and send data on the second resource. Finally, the first terminal device should send the second data to the third terminal device on the second resource.

Based on this solution, the first terminal device needs to receive data on the first resource and send data on the second resource, and the second resource is a resource in the first COT shared by the third terminal device to the first terminal device. , the first terminal device selects to send data to the third terminal device on the second resource. At this time, if there are other terminal devices performing LBT, since the first terminal device has sent data on the second resource, other terminal devices may detect that the channel where the second resource is located is busy, and thus will not seize the second resource. channel, thereby reducing the risk of losing the first COT of the third terminal device, so that the third terminal device can still send data on the time-frequency resources in the first COT. And because of the second capital The channel where the source is located is not preempted by other terminal devices. Therefore, subsequent data sent by the third terminal device can be successfully transmitted, thereby ensuring the service quality of the third terminal device.

In a possible design, the method further includes: not receiving the first data from the second terminal device on the first resource.

Based on this possible design, when the first terminal device is a half-duplex device, since the first terminal device does not have the ability to transmit and receive at the same time, the first terminal device chooses to send the second data on the second resource and not on the first resource. to receive the first data. Since the second data is sent on the second resource, the detection status of the channel where the second resource is located is not idle, so it will not be preempted by other terminal devices, which can reduce the risk of the third terminal device losing the first COT.

In one possible design, sending the second data to the third terminal device on the second resource includes: when the first priority value is lower than or equal to the priority value corresponding to the first data, sending the second data to the third terminal device on the second resource. The third terminal device sends the second data. The first priority value is one of the following items: a priority value corresponding to the second data, a priority value corresponding to the first COT, a network configured priority value, or a preconfigured priority value.

In a possible design, the second information is also used to indicate the priority value corresponding to the first COT.

In a possible design, the priority value corresponding to the first COT is the lowest priority value among the priority values corresponding to the data in the first COT, and the data in the first COT includes the second data.

Based on this possible design, the priority value corresponding to the first COT is set to the lowest priority value among the priority values corresponding to the data in the first COT. When the first terminal device makes a sending and receiving decision based on the priority, due to the The priority value corresponding to one COT is lower. Therefore, the probability that the first terminal device determines the status of the time domain position corresponding to the first resource and the second resource as the sending status can be improved, so that the first terminal device can be in the second time as much as possible. Send data on the resource to ensure that the first COT of the third terminal device will not be lost as much as possible.

In a possible design, the method further includes: sending first resource reservation information on the second resource, where the first resource reservation information is used to indicate the priority of the first to-be-sent data of the first terminal device, and/or , a resource used to carry the first data to be sent, where the first data to be sent and the second data belong to the same service.

Based on this possible design, when the first terminal device sends the first resource reservation information on the second resource, if the resource used to carry the first data to be sent is located in the COT of other terminal devices, and the terminal device receives First resource reservation information, then the terminal device can share the resources used to carry the first data to be sent to the first terminal device, so that the first terminal device can send the first data to be sent, reducing the transmission time due to busy channels. extension.

In a second aspect, a data sending method is provided, which method can be executed by the first terminal device or by components of the first terminal device, such as the processor, chip, or chip system of the first terminal device, and further It can be implemented by a logic module or software that can realize all or part of the functions of the first terminal device. The method includes: the first terminal device determines the second channel occupancy time COT, and receives third information from the second terminal device. Among them, the time-frequency resources in the second COT include third resources. The third information is used to share the third COT with the first terminal device, the time-frequency resources in the third COT include the fourth resource, and the time domain positions of the third resource and the fourth resource overlap. The first terminal device uses the first transmission power to transmit third data on the third resource, and uses the second transmission power to transmit the fourth data on the fourth resource. Wherein, the second transmission power is greater than or equal to the first transmission power.

Based on this solution, when the first terminal device needs to transmit data on the third resource and the fourth resource simultaneously, a larger second transmission power is allocated to the fourth resource. At this time, if there are other terminal devices performing LBT, since the second transmission power corresponding to the fourth resource is relatively large, the energy detected by other terminal devices may be greater than the energy detection threshold, so other terminal devices can determine the channel where the fourth resource is located. Busy, so that the channel where the fourth resource is located will not be preempted, and the risk of losing the third COT of the second terminal device is reduced, so that the second terminal device can still send data on the time-frequency resource in the third COT in the future. Moreover, since the channel where the fourth resource is located is not preempted by other terminal equipment, the second terminal equipment The data sent subsequently can be successfully transmitted, so that the service quality of the second terminal device is guaranteed.

In a possible design, the method further includes: determining the first transmission power and the second transmission power according to the first rule. The first rule includes: when the resources used to send data include preempted resources and shared resources, the sending power corresponding to the shared resources is greater than or equal to the sending power corresponding to the preempted resources, and the sending power corresponding to the shared resources is equal to the sending power corresponding to the preempted resources. The sum of the powers is less than or equal to the maximum transmit power of the first terminal device.

Based on this possible design, the first terminal device can allocate larger transmission power to the data on the shared resource, thereby reducing the risk of losing the COT to which the shared resource belongs.

In a possible design, the third information also includes power control information, and the power control information is used to determine the second transmission power.

Based on this possible design, the first terminal device can allocate transmission power to the data on the shared resource according to the power control information from the second terminal device, which can prevent the first terminal device from allocating smaller power to the data on the shared resource, thereby As a result, the COT to which the shared resource belongs is lost.

In a possible design, the method further includes: the first terminal device receives fourth information from the third terminal device, the fourth information is used to share a fourth COT with the first terminal device, and the time and frequency in the fourth COT The resources include a fifth resource, and the time domain positions of the fourth resource and the fifth resource overlap. Fifth data is transmitted on a fifth resource using a third transmission power. The priority value corresponding to the fourth data is less than or equal to the priority value corresponding to the fifth data, the second transmission power is greater than or equal to the third transmission power, and the third transmission power is greater than or equal to the first transmission power.

Based on this possible design, when there are multiple shared resources, power allocation can be performed according to the priority values corresponding to the multiple shared resources, thereby reducing the risk of COT loss where the corresponding higher priority shared resources are located.

In a possible design, the method further includes: sending second resource reservation information on the third resource, where the second resource reservation information is used to indicate the priority of the second data to be sent by the first terminal device, and/or , a resource used to carry the second data to be sent, where the second data to be sent and the third data belong to the same service.

Based on this possible design, when the first terminal device sends the second resource reservation information on the third resource, if the resource used to carry the second data to be sent is located in the COT of other terminal devices, and the terminal device receives second resource reservation information, then the terminal device can share the resources used to carry the second data to be sent to the first terminal device, so that the first terminal device can send the second data to be sent, reducing the transmission time due to busy channels extension.

In a third aspect, a data sending method is provided, which method can be executed by the first terminal device or by components of the first terminal device, such as the processor, chip, or chip system of the first terminal device, and further It can be implemented by a logic module or software that can realize all or part of the functions of the first terminal device. The method includes: the first terminal device determines a fifth channel occupancy time COT, and receives fifth information from the second terminal device. The time-frequency resources in the fifth COT include sixth resources, and the sixth resources are used to transmit sixth data. The fifth information is used to share the sixth COT with the first terminal device. The time-frequency resources in the sixth COT include the seventh resource. The seventh resource is used to transmit the seventh data. The time domain positions of the sixth resource and the seventh resource overlap. . The first terminal device sends seventh data on the seventh resource.

Based on this solution, when the first terminal device needs to send data on the sixth resource and the seventh resource at the same time, if the sending power of the first terminal device is limited, the first terminal device can choose to send the seventh data on the seventh resource. At this time, if there are other terminal devices performing LBT, since the first terminal device has sent data on the seventh resource, the other terminal devices may detect that the channel where the seventh resource is located is in a busy state, and thus will not seize the seventh resource. The channel where the resource is located reduces the risk of losing the fifth COT of the second terminal device, so that the second terminal device can still send data on the time-frequency resources in the fifth COT. Moreover, since the channel where the seventh resource is located is not preempted by other terminal devices, subsequent data sent by the second terminal device can be successfully transmitted, thereby ensuring the service quality of the second terminal device.

In a possible design, the method further includes: not sending the sixth data on the sixth resource.

In a possible design, the method further includes: receiving sixth information from the third terminal device, the sixth information is used to share the seventh COT with the first terminal device, and the time-frequency resources in the seventh COT include the eighth resource, the eighth resource is used to transmit eighth data, and the time domain positions of the seventh resource and the eighth resource overlap. Sending the seventh data on the seventh resource includes: when the second priority value is lower than or equal to the third priority value, sending the seventh data on the seventh resource. The second priority value is one of the following items: the priority value corresponding to the seventh data, the priority value corresponding to the sixth COT, the priority value configured by the network, or the preconfigured priority value. The third priority value is one of the following items: the priority value corresponding to the eighth data, the priority value corresponding to the seventh COT, the priority value configured by the network, or the preconfigured priority value.

In a possible design, the fifth information is also used to indicate the priority value corresponding to the sixth COT; and/or the sixth information is also used to indicate the priority value corresponding to the seventh COT.

In a possible design, the priority value corresponding to the sixth COT is the lowest priority value among the priority values corresponding to the data in the sixth COT, and the data in the sixth COT includes seventh data; and/or, The priority value corresponding to the seventh COT is the lowest priority value among the priority values corresponding to the data in the seventh COT, and the data in the seventh COT includes the eighth data.

In a possible design, the method further includes: sending third resource reservation information on the seventh resource, where the third resource reservation information is used to indicate the priority of the third to-be-sent data of the first terminal device, and/or , a resource used to carry the third data to be sent, where the third data to be sent and the seventh data belong to the same service.

Based on this possible design, the terminal device that receives the third resource reservation information can share the resources used to carry the third data to be sent with the first terminal device, so that the first terminal device can send the third data to be sent, reducing the Transmission delay due to busy channel.

In combination with the above first, second, or third aspect, in a possible design, COT may refer to the occupancy time (or usage time) of the channel accessed through the LBT. Alternatively, COT can refer to the maximum length of time that information can be sent continuously corresponding to the sending opportunity after the LBT occupies the channel to obtain the sending opportunity.

Combined with the above first aspect, second aspect or third aspect, in a possible design, the channel corresponding to the COT may refer to the channel that the terminal device preempts (or accesses) through LBT, and the COT is the channel that the terminal device preempts through LBT ( or access) channel occupation time (or usage time).

A fourth aspect provides a communication device for implementing various methods. The communication device may be the first terminal device in the first aspect, the second aspect, or the third aspect, or a device included in the first terminal device, such as a chip. The communication device includes modules, units, or means (means) corresponding to the implementation method. The modules, units, or means can be implemented by hardware, software, or by hardware executing corresponding software. The hardware or software includes one or more modules or units corresponding to functions.

In some possible designs, the communication device may include a processing module and a transceiver module. This processing module can be used to implement the processing functions in any of the above aspects and any possible implementation manner thereof. The transceiver module may include a receiving module and a sending module, respectively used to implement the receiving function and the sending function in any of the above aspects and any possible implementation manner thereof.

In some possible designs, the transceiver module can be composed of a transceiver circuit, a transceiver, a transceiver or a communication interface.

In a fifth aspect, a communication device is provided, including: a processor and a memory; the memory is used to store computer instructions, and when the processor executes the instructions, the communication device performs the method described in any aspect. The communication device may be the first terminal device in the first aspect, the second aspect, or the third aspect, or a device included in the first terminal device, such as a chip.

A sixth aspect provides a communication device, including: a processor and a communication interface; the communication interface is used to communicate with modules external to the communication device; the processor is used to execute computer programs or instructions to enable the communication device Perform the methods described in either aspect. The communication device may be the first terminal device in the first aspect, the second aspect, or the third aspect, or a device included in the first terminal device, such as a chip.

In a seventh aspect, a communication device is provided, including: at least one processor; the processor is configured to execute a computer program or instructions stored in a memory, so that the communication device executes the method described in any aspect. The memory may be coupled to the processor, or may be independent of the processor. The communication device may be the first terminal device in the first aspect, the second aspect, or the third aspect, or a device included in the first terminal device, such as a chip.

In an eighth aspect, a computer-readable storage medium is provided. The computer-readable storage medium stores computer programs or instructions, which when run on a communication device, enable the communication device to perform the method described in any aspect.

A ninth aspect provides a computer program product containing instructions that, when run on a communication device, enable the communication device to perform the method described in any aspect.

A tenth aspect provides a communication device (for example, the communication device may be a chip or a chip system). The communication device includes a processor for implementing the functions involved in any aspect.

In some possible designs, the communication device includes a memory for storing necessary program instructions and data.

In some possible designs, when the device is a system-on-a-chip, it may be composed of a chip or may include chips and other discrete components.

It can be understood that when the communication device provided in any one of the fourth to tenth aspects is a chip, the sending action/function can be understood as outputting information, and the receiving action/function can be understood as inputting information.

Among them, the technical effects brought by any design method in the fourth to tenth aspects can be referred to the technical effects brought by different design methods in the first aspect, the second aspect, or the third aspect, and will not be described again here. .

Description of the drawings

Figure 1 is a schematic diagram of a staggered RB provided by this application;

Figure 2 is a schematic diagram of COT sharing provided by this application;

Figure 3 is a schematic diagram of a simultaneous sending and receiving scenario provided by this application;

Figure 4 is a schematic diagram of another simultaneous sending and receiving scenario provided by this application;

Figure 5 is a schematic diagram of a simultaneous sending scenario provided by this application;

Figure 6a is a schematic structural diagram of a communication system provided by this application;

Figure 6b is a schematic diagram of a scenario provided by this application for determining whether a terminal device is in a network coverage area;

Figure 6c is a schematic structural diagram of a communication device provided by this application;

Figure 7 is a schematic flow chart of a data sending method provided by this application;

Figure 8 is a schematic diagram of a communication scenario involving COT sharing provided by this application;

Figure 9 is a schematic diagram of another COT sharing provided by this application;

Figure 10 is a schematic diagram of another communication scenario involving COT sharing provided by this application;

Figure 11 is a schematic flow chart of another data sending method provided by this application;

Figure 12 is a schematic diagram of another communication scenario involving COT sharing provided by this application;

Figure 13 is a schematic diagram of another COT sharing provided by this application;

Figure 14 is a schematic flow chart of another data sending method provided by this application;

Figure 15 is a schematic diagram of yet another communication scenario involving COT sharing provided by this application;

Figure 16 is a schematic flow chart of yet another data sending method provided by this application;

Figure 17 is a schematic flow chart of yet another data sending method provided by this application;

Figure 18a is a schematic structural diagram of a resource pool provided by this application;

Figure 18b is a schematic structural diagram of another resource pool provided by this application;

Figure 19 is a schematic structural diagram of a staggered PRB provided by this application;

Figure 20 is a schematic diagram of the positions of PSCCH and PSSCH provided by this application;

Figure 21 is a schematic structural diagram of a first terminal device provided by this application.

Detailed ways

In the description of this application, unless otherwise stated, "/" means that the related objects are in an "or" relationship. For example, A/B can mean A or B; "and/or" in this application only means It is an association relationship that describes associated objects. It means that there can be three relationships. For example, A and/or B can mean: A exists alone, A and B exist simultaneously, and B exists alone. Among them, A and B Can be singular or plural.

In the description of this application, unless otherwise stated, "plurality" means two or more than two. "At least one of the following" or similar expressions thereof refers to any combination of these items, including any combination of a single item (items) or a plurality of items (items). For example, at least one of a, b, or c can mean: a, b, c, a and b, a and c, b and c, a and b and c, where a, b, c Can be single or multiple.

In addition, in order to facilitate a clear description of the technical solutions of the embodiments of the present application, in the embodiments of the present application, words such as “first” and “second” are used to distinguish identical or similar items with basically the same functions and effects. Those skilled in the art can understand that words such as "first" and "second" do not limit the number and execution order, and words such as "first" and "second" do not limit the number and execution order.

In the embodiments of this application, words such as "exemplary" or "for example" are used to represent examples, illustrations or explanations. Any embodiment or design described as "exemplary" or "such as" in the embodiments of the present application is not to be construed as preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary" or "such as" is intended to present related concepts in a concrete manner that is easier to understand.

It will be understood that reference throughout this specification to "an embodiment" means that a particular feature, structure, or characteristic associated with the embodiment is included in at least one embodiment of the present application. Therefore, various embodiments are not necessarily referred to the same embodiment throughout this specification. Furthermore, the particular features, structures or characteristics may be combined in any suitable manner in one or more embodiments. It can be understood that in the various embodiments of the present application, the size of the sequence numbers of each process does not mean the order of execution. The execution order of each process should be determined by its functions and internal logic, and should not be determined by the execution order of the embodiments of the present application. The implementation process constitutes no limitation.

It can be understood that some optional features in the embodiments of the present application, in certain scenarios, can be implemented independently without relying on other features, such as the solutions they are currently based on, to solve corresponding technical problems and achieve corresponding effects. , and can also be combined with other features according to needs in certain scenarios. Correspondingly, the devices provided in the embodiments of the present application can also implement these features or functions, which will not be described again here.

In this application, unless otherwise specified, the same or similar parts between various embodiments may be referred to each other. In the various embodiments of this application, if there are no special instructions or logical conflicts, the terms and/or descriptions between different embodiments are consistent and can be referenced to each other. Different embodiments can be combined to form new ones according to their inherent logical relationships. Embodiments. The embodiments of the present application described below do not constitute a limitation on the protection scope of the present application.

In order to facilitate understanding of the technical solutions of the embodiments of the present application, a brief introduction to the relevant technologies of the present application is first provided as follows.

1. Device-to-device (D2D) communication:

With the increasing number of communication scenarios, D2D technology has developed rapidly in recent years because it has the advantage of direct communication without network infrastructure. The application of D2D technology can reduce the burden on cellular networks, reduce battery power consumption of user equipment, increase data rates, and meet the needs of proximity services.

D2D communication: refers to the technology of direct communication between multiple terminal devices. In the 3rd generation partnership project (3GPP), terminal equipment and terminal equipment direct communication are defined from the perspective of air interface (air interface). The air interface used for communication is PC5, therefore, D2D communication can also be called PC5 communication. In addition, from a link perspective, the link through which the terminal device directly communicates with the terminal device is defined as a sidelink (SL). Therefore, D2D communication can also be called SL communication.

D2D communication can be widely used in a variety of scenarios. Typical application scenarios include vehicle-to-everything (V2X) scenarios and communication scenarios between smart terminals. Among them, V2X can include: vehicle-to-vehicle (V2V) communication, vehicle-to-pedestrian (V2P) communication, vehicle-to-infrastructure (V2I) communication, vehicle-to-network ( vehicle to network, V2N) communication, etc. Communication between smart terminals can include: communication between mobile phones and wearable devices, communication between augmented reality (AR)/virtual reality (VR) helmets (or glasses) and smart screens, sensors communication, etc.

Usually, the terminal equipment using D2D technology is a half-duplex equipment, that is, the terminal equipment can only be in the sending state or the receiving state at the same time, and does not have the ability to send and receive at the same time.

2. Resource awareness:

3GPP version (Release, Rel) 16 defines two resource allocation modes, mode 1 and mode 2, for SL. In mode 1, the base station schedules or configures resources for the sending terminal device and its corresponding receiving terminal device.

In mode 2, the resources used for SL transmission are determined by the sending terminal device through channel sensing and selection. At this time, the terminal device can work in a scenario without network coverage. Mode 2 supports resource reservation, and the resource reservation information is indicated in the first-stage ( ^1st -stage) sidelink control information (SCI).

In mode 2, when a new transmission block (TB) is generated, or when the previously reserved resources under the semi-static allocation scheme are not suitable for the newly generated TB transmission, the upper layer triggers SL resource selection. When SL resource selection is triggered in time slot n, the sending terminal device determines the candidate resources in the resource selection window (RSW) based on the resource reservation information of other terminal devices sensed in the sensing window (Sensing Window), using Transmitted in TB. For example, assuming that SL resource selection is triggered in time slot n, the specific steps for mode 2 resource allocation are as follows:

Step 1), determine the resource selection window.

Among them, the time slot range of the selection window is the time slot [n+T ₁ ,n+T ₂ ]. T ₁ is determined by the capability of the terminal device, and T ₂ is determined by the packet delay budget (PDB).

By way of example, T _2min ≤T ₂ ≤PDB, where, Indicates the delay for the terminal device to select resources and send data, including the processing delay for the terminal device to determine the resource selection window. There is a correspondence between the value of and the subcarrier spacing μ _SL used in transmission as shown in Table 1 below.

Table 1

Among them, μ _SL is used to indicate the subcarrier spacing, and one value of μ _SL indicates one kind of subcarrier spacing.

Step 2), determine the sensing window.

Among them, the time slot range of the sensing window is T ₀ is determined by the high-level parameter sl-SensingWindow, Indicates the delay for the terminal device to process the sensing results within the sensing window. There is a corresponding relationship between the value of and the subcarrier spacing used in transmission as shown in Table 2 below.

Table 2

Within the sensing window, the terminal device continues to listen to each time slot in the resource pool and decodes the first-stage ( ^1st -stage) side of the physical sidelink control channel (PSCCH) on each time slot. sidelink control information (SCI), and measure the demodulation reference signal (DMRS) of the PSCCH and/or the physical sidelink shared channel (PSSCH) scheduled by the PSCCH ) of the reference signal received power (RSRP).

Step 3), obtain the priority p _i = prio _RX indicated in the ^1st -stage SCI, and the priority p _j = prio _TX of the transmission TB of the terminal device configured by the upper layer, and determine the RSRP related to p _i and p _j Threshold Th( _pi ,p _j ).

Step 4): Determine the initial single-slot candidate resource set _SA .

The initial single-slot candidate resource set S _A includes all single-slot candidate resources in the SL resource pool within the selection window. A single slot candidate resource R _x,y is defined as a slot The continuous L _subCH sub-channels starting from sub-channel x. The total number of single-slot candidate resources in the initial single-slot candidate resource set S _A is recorded as M _total .

Step 5), for a certain single-slot candidate resource R _x,y in the initial single-slot candidate resource set S _A (assuming that it is located in the time slot ), when the following two conditions are met at the same time, the single-slot candidate resource will be excluded from S _A :

a) The terminal device is in the time slot There is no channel listening in (for example, the terminal device is in the transmitting state in this time slot). in, is the time slot within the sensing window.

b) For any resource reservation interval value P _rsvp allowed by the high-level parameter sl-ResourceReservePeriodList, the time slot and There is overlap. Among them, q is the guaranteed time slot A positive integer located in the selection window [n+T ₁ ,n+T ₂ ], 0≤j≤C _resel -1.

Step 5a), if the number of single-slot candidate resources remaining in _SA after step 5) is less than X%·M _total , perform step 4) again. After performing step 4) again, you can perform step 6), and the exclusion in step 5) will no longer take effect.

Step 6), for a certain single-slot candidate resource R _x,y in the initial single-slot candidate resource set S _A (assuming that it is located in the time slot ), when the following three conditions are met at the same time, the single-slot candidate resource will be excluded from S _A :

a) The terminal device is in the time slot Decode the ^1st -stage SCI carried by a certain PSCCH. The value indicated by the resource reservation period field in the ^1st -stage SCI is P _{rsvp_RX} (in ms), which is converted into a period in time slots. P′ _{rsvp_RX} . In addition, the priority indicated by the Priority field in the ^1st -stage SCI is prio _RX . The subchannel resources occupied by the PSCCH and the PSSCH scheduled by the PSCCH in the frequency domain are R _RX .

b) The RSRP of the DMRS of the PSCCH, or the RSRP of the DMRS of the PSSCH scheduled by the PSCCH, is higher than the RSRP threshold determined in step 3).

c) The reservation resource indicated by the ^1st -stage SCI is located in the resource selection window. That is, time slot resources on R _RX and There is overlap, where q is the guaranteed time slot The positive integer located in the selection window [n+T ₁ ,n+T ₂ ] number. time slot The resource R on _RX is a periodic resource reserved for other terminal devices. Indicates the resources after the single slot candidate resource R _{x, y} is extended according to the period P′ _{rsvp_TX} , 0≤j≤C _resel -1.

It is understandable that for a certain time slot within the sensing window For example, the terminal device only needs to perform one of steps 5) and 6). That is, if the terminal device is in the time slot within the sensing window If the terminal device does not perform channel listening, perform step 5); if the terminal device is in the time slot within the sensing window, Decode the ^1st -stage SCI of a certain PSCCH and perform step 6).

Step 7), if the number of remaining single-slot candidate resources in the initial single-slot candidate resource set _SA is less than X%·M _total , increase the RSRP threshold in step 3) (increase by 3dB each time), and return to step 4 ) to continue the process. If the number of single-slot candidate resources remaining in _SA is greater than X%·M _total , _SA is reported to the higher layer.

3. Licensed frequency bands and unlicensed frequency bands:

In wireless communication systems, frequency bands can be divided into licensed frequency bands and unlicensed frequency bands. Typically, cellular mobile communication systems operate in licensed frequency bands. In the authorized frequency band, terminal equipment uses spectrum resources based on the scheduling of the central node.

In the fourth generation (4G) long term evolution (LTE) system, research on unlicensed frequency bands for cellular mobile communications began, giving rise to LTE in Unlicensed spectrum. Referred to as LTE-U) technology, etc.

Since there are other communication systems (such as Wi-Fi systems) operating in unlicensed frequency bands, a listen-before-talk (LBT) mechanism is introduced in LTE-U, allowing the LTE-U system to work in Other communication systems in unlicensed frequency bands can coexist.

The LBT mechanism is a channel access rule based on random backoff. The communication device needs to sense whether the channel is idle before accessing the channel and starting to send data. If the channel remains idle for a period of time, it can occupy the channel and send data in the channel after the LBT execution is completed. If the channel is not idle, the channel needs to be occupied after the channel becomes idle and the LBT is completed. Among them, the length of time the channel is occupied is called channel occupancy time (COT). In addition, COT can also be understood as: after obtaining the sending opportunity through LBT occupying the channel, the maximum time length corresponding to the sending opportunity that can continuously send information is related to the priority of the data to be sent; or, COT can also be understood as: The usage time of the channel accessed through LBT.

The LBT mechanism supports COT sharing, that is, after a communication device obtains a COT through LBT, it can share the unlicensed spectrum resources in the COT with other communication devices.

LBT mechanisms can generally be divided into the following four categories:

Category 1 LBT (Category 1 LBT): referred to as Cat 1 LBT. The communication device can transmit immediately after transitioning from the receiving state to the transmitting state in the COT without channel listening. That is, it is sent immediately after a short switching gap. The conversion interval is less than or equal to 16 microseconds (microsecond, us).

Among them, the receiving status of the communication device in the COT may be caused by the following reasons: after the communication device obtains the COT, it shares part of the time-frequency resources in the COT with another communication device. Then, on this part of the time-frequency resources, the communication The device is in receiving mode. After this part of time-frequency resources, the communication device can transition from the receiving state to the transmitting state, and can transmit immediately after transitioning to the transmitting state.

Category 2 LBT (Category 2 LBT): Cat 2 LBT for short, is a LBT without random backoff. The communication device accesses the channel after detecting that the channel is idle for a certain period of time.

Category 3 LBT: Cat 3 LBT for short, is a random backoff LBT. Among them, the size of the contention window used for random backoff is fixed. The communication device can determine the random number N within the contention window, and then access the channel after sensing that the channel is in an idle state for a random period of time. The random time is determined by the random number N.

Category 4 LBT (Category 4 LBT): Cat 4 LBT for short, is a kind of random backoff LBT. The difference from Cat 3LBT is that the contention window used for random backoff has a variable size. The communication device can change the size of the contention window.

Generally, channel sensing can adopt energy-based channel detection or signal type-based channel detection. In energy-based channel detection, when the energy detected on the channel is greater than the Energy Detection Threshold (Energy Detection Threshold), it means that the channel is busy. When it is detected that the energy on the channel is lower than the energy detection threshold, it means that the channel is idle.

With the evolution of communication systems, the 5th generation (5G) new radio (NR) has also introduced the NR system under unlicensed spectrum, referred to as NR-U.

The equipment in NR-U (referred to as NR-U equipment for short) follows the 3GPP protocol and uses the LBT mechanism to access the channel. For example, NR-U devices usually use the following four types of LBT mechanisms:

Type 1 LBT: Essentially the above-mentioned Cat 4 LBT. The NR-U device accesses the channel after random backoff.

Type 2A LBT: Cat 2 LBT with 25us interval. The NR-U device accesses the channel after sensing that the channel is idle for 25us.

Type 2B LBT: Cat 2 LBT with 16us interval. The NR-U device accesses the channel after sensing that the channel is idle for 16us.

Type 2C LBT: Cat 1 LBT with up to 16us spacing. The NR-U device does not need to listen to the channel and access the channel after a conversion interval of up to 16us in the COT.

The concept of interlaced resource block is introduced in NR-U. Among them, the definition of interlace m includes multiple resource blocks (RBs). The indexes of these multiple RBs are {m, M+m, 2M+m, 3M+m,...}, m∈{0,1 ,…M-1}.

Among them, M is determined by sub-carrier spacing (SCS). For example, when the subcarrier spacing is 15KHz, M is equal to 10; when the subcarrier spacing is 30KHz, M is equal to 5.

For example, taking the subcarrier interval as 15KHz, as shown in Figure 1, 10 interlaces with indexes 0-9 can be defined. The index of the RB included in Interlace#0 is {0,10,20,30,...}, the index of the RB included in Interlace#1 is {1,11,21,31,...}, and so on, The index of the RB included in Interlace#9 is {9,19,29,39,...}.

Due to the wide application of SL communications, the use of unlicensed frequency bands in SL communications is an important evolution direction, and the corresponding systems (or protocols or technologies) can be collectively referred to as SL-U. Communication equipment working in the SL-U system can be called SL-U equipment.

In the SL-U system, the mode 2 resource allocation method introduced above is no longer applicable, and SL-U devices need to access the channel through the LBT mechanism.

LBT in SL-U also supports COT sharing. For example, as shown in Figure 2, terminal device A seizes channel 1. After obtaining the COT, it can send COT sharing indication information to terminal device B and terminal device C respectively. The COT sharing indication information can instruct terminal device A to share it with the terminal. The time-frequency domain locations of the resources of device B and terminal device C. After receiving the sharing indication information, terminal equipment B and terminal equipment C access the channel through Type 2A or Type 2B or Type 2C at the corresponding time according to the sharing indication information.

4. Sending and receiving decisions:

In the unlicensed frequency band, a certain half-duplex terminal device may have the following transceiver requirements at the same time:

a) The first signal is sent (or received) in E-UTRA, and the second signal is received (or sent) in NR, and the sending time of the first signal overlaps with the receiving time of the second signal;

b) Transmit at least one sidelink signal and receive at least one sidelink signal, and the time of transmitting and receiving the sidelink signal overlaps;

c) Perform uplink (UL) transmission and SL transmission on two carriers at the same time, and exist on one link Receive demand, there is a send demand on another link.

For the above three situations, the terminal device can make sending and receiving decisions based on priority information. For example, execute the requirements corresponding to signals with higher priority.

For example, as shown in Figure 3, assume that terminal device B seizes channel 1 to obtain COT#1 at time t1, and terminal device B needs to send data a to terminal device A at time t3. That is, terminal device A needs to receive data from the terminal at time t3. Data a of device B. At time t2, terminal device A seizes channel 2 to obtain COT#2, and at time t3 terminal device A needs to send data b to terminal device C. Then at time t3, terminal device A has a conflict between sending data and receiving data.

At this time, if the priority corresponding to data a is higher than the priority corresponding to data b, then terminal device A gives up sending data b at time t3 and receives data a from terminal device B. If the priority corresponding to data a is lower than the priority corresponding to data b, then terminal device A gives up receiving data a at time t3 and sends data b to terminal device C.

5. Power distribution:

In SL communication, when a terminal device needs to send N _{sch, Tx, PSFCH} physical sidelink feedback channel (PSFCH) signals at the same time, the following power allocation method can be used:

When N _sch,Tx,PSFCH ≤N _max,PSFCH , it means that the N _sch,Tx,PSFCH PSFCH signals can be transmitted simultaneously. Among them, N _max,PSFCH represents the maximum number of PSFCH signals allowed to be sent simultaneously. At this time, the N _{sch, Tx, PSFCH} PSFCH signals equally share the maximum transmit power _PCMAX of the terminal equipment.

When N _sch,Tx,PSFCH >N _max,PSFCH , it means that the number of PSFCH signals to be sent is greater than the maximum number of PSFCH signals that can be sent. At this time, the terminal equipment sorts the N _{sch, Tx, PSFCH} PSFCH signals in order from high to low priority, selects the first N _{max, PSFCH} PSFCH signals for transmission, and distributes the N _{max, PSFCH} PSFCH signals equally. The maximum transmit power _PCMAX of the terminal device.

Currently, in the SL-U system, since the base station may not participate in resource allocation and scheduling, it may cause some problems in COT sharing between terminal devices, such as reduced service quality of the business.

For example, as shown in Figure 4, assume that terminal device B seizes channel 1 to obtain COT#1 at time t1, and shares resource 1 in COT#1 to terminal device A for terminal device A to send on resource 1. Data 1. In addition, at time t2, terminal device C seizes channel 2 to obtain COT#2, and sends data 2 to terminal device A on resource 2 in COT#2. That is, terminal device A needs to receive data from terminal device C on resource 2. 2. Since the time domain locations of resource 1 and resource 2 overlap, and terminal device A does not have the ability to transmit and receive at the same time, terminal device A needs to make a transmission and reception decision.

If the above priority-based sending and receiving decision-making scheme is used, when the priority of data 2 is higher than the priority of data 1, terminal device A receives data 2 on resource 2 and gives up sending data 1 on resource 1. In this scenario, terminal device A does not use resource 1, and terminal device B does not send data on resource 1 because it shares resource 1 with terminal device A. At this time, if there is another terminal device D that is performing LBT, since there is no data transmission on resource 1, terminal device D may think that the channel at resource 1 is idle, and thus seize channel 1 to obtain COT#3, and the COT#3 A period of time including COT#1, causing terminal equipment B to lose COT.

After resource 1, terminal device B needs to access the channel through Type 2A LBT or Type 2B LBT or Type 2C LBT, but at this time terminal device D obtains COT#3 and sends data on channel 1. Therefore, terminal equipment B determines that the channel is busy, and the remaining resources in COT#1 obtained by it are lost, causing some data of terminal equipment B to be unable to be transmitted, and thus the service quality of the business cannot be guaranteed.

Or, for example, as shown in Figure 5, assume that at time t, terminal device A needs to send data 1 on resource 1 and data 2 on resource 2. Among them, resource 1 is the resource in COT#1 obtained by terminal device A by seizing channel 1, and resource 2 is the resource in COT#2 shared by terminal device A after terminal device B seizes channel 2 to obtain COT#2.

If terminal device A uses the above priority-based power allocation scheme, terminal device A may give up sending data 2 when the priority of data 2 is lower than the priority of data 1. At this time, the COT#2 of terminal equipment B will be lost, resulting in a failure to guarantee the service quality of the business.

Alternatively, terminal device A sends data 1 on resource 1 and data 2 on resource 2 at the same time. However, since data 1 and data 2 equally share the maximum transmission power of terminal device A, the transmission power of data 2 may be smaller. At this time, if there is another terminal device that is performing LBT, and the energy detection threshold set by the terminal device is large, so that the transmission power of data 2 is less than the energy detection threshold, then the terminal device will think that channel 2 is idle, and then seize the channel. 2, resulting in the loss of COT#2 of terminal equipment B, which in turn causes the service quality of the business to be unable to be guaranteed.

Based on this, this application provides a data sending method that can reduce the risk of losing COT for terminal equipment sharing COT, try to ensure the data transmission of the terminal equipment, and ensure the quality of business service.

The technical solutions of the embodiments of this application can be used in various communication systems. The communication system can be, for example, a V2X system, a D2D system, an M2M system, an Internet of Things (IoT) system, a Wi-Fi system, and a global microwave interconnection system. (worldwide interoperability for microwave access, WiMAX) systems, and other next-generation communication systems. No restrictions.

The technical solutions of the embodiments of the present application can be applied to various communication scenarios, for example, can be applied to one or more of the following communication scenarios: enhanced mobile broadband (eMBB), ultra-reliable low-latency communication (ultra reliable Communication scenarios such as low latency communication (URLLC), machine type communication (MTC), massive machine type communications (mMTC), D2D, V2X, and IoT.

The above-mentioned communication systems and communication scenarios applicable to the present application are only examples. The communication systems and communication scenarios applicable to the present application are not limited to these, and will be explained uniformly here, and will not be described in detail below.

Referring to Figure 6a, a communication system provided by an embodiment of the present application is shown. The communication system includes multiple terminal devices. Among them, various terminal devices can communicate with each other through SL. Optionally, the plurality of terminal devices include half-duplex terminal devices, that is, terminal devices that do not have simultaneous sending and receiving capabilities.

For example, taking a communication system including two terminal devices as shown in (a) in Figure 6b, the two terminal devices may both be in the network coverage area. Or, as shown in (b) of FIG. 6b , one of the two terminal devices is in a network coverage area and the other is in an area without network coverage. Or, as shown in (c) in Figure 6b, the two terminal devices may be in different network coverage areas. Or, as shown in (d) in Figure 6b, the two terminal devices may both be in areas without network coverage.

Optionally, the terminal device in the embodiment of this application may refer to a device with a wireless transceiver function. Terminal equipment can also be called user equipment (UE), terminal, access terminal, user unit, user station, mobile station (MS), remote station, remote terminal, mobile terminal (MT) , user terminal, wireless communication equipment, user agent or user device, etc. The terminal device may be, for example, a terminal device in an IoT, V2X, D2D, M2M, 5G network, or a future evolved public land mobile network (public land mobile network, PLMN). Terminals can be deployed on land, including indoors or outdoors, handheld or vehicle-mounted; they can also be deployed on water (such as ships, etc.); they can also be deployed in the air (such as aircraft, balloons, satellites, etc.).

Exemplarily, the terminal device may be an IoT device (for example, a sensor, an electricity meter, a water meter, etc.), a V2X device, a station (STA) in a wireless local area network (WLAN), a cellular phone, a cordless phone, a session Session initiation protocol (SIP) telephones, wireless local loop (WLL) stations, personal digital assistant (PDA) devices, handheld devices with wireless communication capabilities, computing devices or connected to wireless Other processing equipment for modems, in-vehicle equipment, wearable devices (can also (called wearable smart devices), tablet computers or computers with wireless transceiver functions, virtual reality (VR) terminals, wireless terminals in industrial control (industrial control), wireless terminals in self-driving (self driving) , wireless terminals in remote medical, wireless terminals in smart grid, wireless terminals in transportation safety, wireless terminals in smart city, smart home ), wireless terminals, vehicle-mounted terminals, vehicles with V2V communication capabilities, intelligent connected vehicles, drones with UAV to UAV (U2U) communication capabilities, etc. The terminal may be mobile or fixed, which is not specifically limited in this application.

Optionally, the terminal device in the embodiment of the present application may also be called a communication device, which may be a general-purpose device or a special-purpose device, which is not specifically limited in the embodiment of the present application.

Optionally, in this embodiment of the present application, the terminal device in Figure 6a or Figure 6b can be implemented through the communication device 60 in Figure 6c. Figure 6c shows a schematic structural diagram of a communication device 60 provided by an embodiment of the present application. The communication device 60 includes one or more processors 601, a communication bus 602, and at least one communication interface (FIG. 6c is only an example of including a communication interface 604 and a processor 601 for illustration). Optional may also include memory 603.

The processor 601 can be a general central processing unit (CPU), a microprocessor, an application-specific integrated circuit (ASIC), or one or more processors used to control the execution of the program of the present application. Integrated circuit, or processing core for processing data (such as computer program instructions). The processor can be a single-core (single-CPU) processor or a multi-core (multi-CPU) processor.

In specific implementation, as an embodiment, the processor 601 may include one or more CPUs, such as CPU0 and CPU1 in Figure 6c.

The communication bus 602 may be a peripheral component interconnect (PCI) bus or an extended industry standard architecture (EISA) bus, etc. The bus can be divided into address bus, data bus, control bus, etc. For ease of presentation, only one thick line is used in Figure 6c, but it does not mean that there is only one bus or one type of bus. The communication bus 602 is used to connect different components in the communication device 60 so that different components can communicate.

The communication interface 604 is used to communicate with other devices or communication networks. The communication network may be, for example, Ethernet, wireless access network (radio access network, RAN), wireless local area networks (WLAN), etc. For example, the communication interface 604 may be a device such as a transceiver or a transceiver. Alternatively, the communication interface 604 may also be a transceiver circuit located in the processor 601 to implement signal input and signal output of the processor.

The memory 603 may be a device with a storage function. For example, it can be read-only memory (ROM) or other types of static storage devices that can store static information and instructions, random access memory (random access memory, RAM) or other types of things that can store information and instructions. Dynamic storage devices can also be electrically erasable programmable read-only memory (EEPROM), compact disc read-only memory (CD-ROM) or other optical disk storage, optical disc storage ( Including compressed optical discs, laser discs, optical discs, digital versatile discs, Blu-ray discs, etc.), magnetic disk storage media or other magnetic storage devices, or can be used to carry or store desired program code in the form of instructions or data structures and can be stored by a computer. any other medium, but not limited to this. The memory may exist independently and be connected to the processor through the communication bus 602 . Memory can also be integrated with the processor.

Among them, the memory 603 is used to store computer execution instructions for executing the solution of the present application, and is controlled by the processor 601 for execution. The processor 601 is used to execute computer execution instructions stored in the memory 603, thereby implementing the method provided in the embodiment of the present application.

Or, optionally, in the embodiment of the present application, the processor 601 may also execute the methods provided in the following embodiments of the present application. For processing-related functions in the method, the communication interface 604 is responsible for communicating with other devices or communication networks, which is not specifically limited in the embodiment of the present application.

Optionally, the computer-executed instructions in the embodiments of the present application may also be called application codes, which are not specifically limited in the embodiments of the present application.

In specific implementation, as an embodiment, the communication device 60 may also include an output device 605 and an input device 606. Output device 605 communicates with processor 601 and can display information in a variety of ways. For example, the output device 605 may be a liquid crystal display (LCD), a light emitting diode (LED) display device, a cathode ray tube (CRT) display device, or a projector (projector), etc. Input device 606 communicates with processor 601 and can receive user input in a variety of ways. For example, the input device 606 may be a mouse, a keyboard, a touch screen device, a sensing device, or the like.

It should be noted that the composition structure shown in Figure 6c does not limit the communication device. In addition to the components shown in Figure 6c, the communication device may include more or less components than shown in the figure, or a combination of Certain parts, or different arrangements of parts.

It can be understood that in the embodiment of the present application, the terminal device can perform some or all of the steps in the embodiment of the present application. These steps or operations are only examples. The embodiment of the present application can also perform other operations or variations of various operations. In addition, various steps may be performed in a different order than those presented in the embodiments of the present application, and it may not be necessary to perform all operations in the embodiments of the present application.

In order to facilitate understanding of the data sending method provided in the following embodiments of the present application, the relevant concepts involved in the following embodiments are first introduced:

Sharing a COT by a terminal device can be understood as: the terminal device shares part of the time-frequency resources in the COT with other terminal devices.

The time-frequency resources within a COT may include resources whose time domain location is within the COT and frequency domain location is within the channel corresponding to the COT. The channel corresponding to the COT is a channel that the terminal device preempts (or accesses) through LBT, and the COT is the occupancy time (or usage time) of the channel that the terminal device preempts (or accesses).

Preemption resources: For a certain terminal device, preemption resources refer to the time-frequency resources in the COT corresponding to the channel that the terminal device seizes.

Shared resources: For a certain terminal device, shared resources refer to the time-frequency resources within the COT of other terminal devices that other terminal devices share with the terminal device.

Priority value: The priority value indicates the priority. It should be noted that the lower the priority value, the higher the priority it indicates; the higher the priority value, the lower the priority it indicates.

The data methods provided in this application are introduced below. As shown in Figure 7, it is a flow chart of a data sending method provided by an embodiment of the present application. Referring to Figure 7, the data sending method may include the following steps:

S701. The second terminal device sends the first information to the first terminal device. Correspondingly, the first terminal device receives the first information from the second terminal device.

The first information indicates resources reserved by the second terminal device, and the resources include the first resources. The first resource is used by the second terminal device to send the first data to the first terminal device, or in other words, the first resource is used by the first terminal device to receive the first data from the second terminal device.

Optionally, before step S701, the second terminal device may perform LBT to obtain the COT, and send a signal to the first terminal device on the time-frequency resources within the COT. Exemplarily, the time-frequency resources may include a physical sidelink shared channel (PSSCH) and a physical sidelink control channel (PSCCH), and the second terminal device may be on the PSSCH. Send data #1 to the first terminal device, and on the PSCCH Send the first information to the terminal device.

For example, taking the first terminal device as UE-A and the second terminal device as UE-B, as shown in Figure 8, assume that before time slot n ₀ , UE-B determines that channel 1 is idle after performing LBT, And successfully seizes channel 1 and obtains the COT of channel 1. In time slot n ₀ , UE-B sends information to UE-A, including data #1 and first information. Among them, the COT of channel 1 is the usage time of channel 1 when UE-B accesses channel 1 through LBT. For example, as shown in Figure 8, assuming that UE-B obtains the COT of channel 1 through LBT access channel 1 at time t1, and the COT of channel 1 ends at time t2, then between time t1 and time t2 UE-B can use channel 1, and time t1 to time t2 are the COT of channel 1 obtained by UE-B.

Optionally, data #1 may be data of the first periodic service. The resources reserved by the second terminal device indicated by the first information are used to transmit data of the first periodic service, that is, the first data may also be data of the first periodic service.

Optionally, the first information may include at least one of the priority of the first periodic service, the period of the first periodic service, a time domain resource indication value, and a frequency domain resource indication value. The time domain resource indication value is used to indicate the time domain position of the resource reserved by the second terminal device, such as the time domain starting position, time domain duration, etc. The frequency domain resource indication value is used to indicate the frequency domain location of the reserved resource.

Optionally, the second terminal device may send an SCI to the first terminal device, where the SCI carries the first information. For example, the SCI may be a first-order SCI.

Optionally, after receiving the first information, the first terminal may determine that it will receive the first data from the second terminal device on the first resource. That is, the first terminal device can determine that at the time domain position corresponding to the first resource, the first terminal device should be in the receiving state.

For example, as shown in Figure 8, assuming that the first information indicates that the first resource reserved by the second terminal device is channel 1 on time slot n ₅ , after receiving the first information in time slot n ₀ , UE-A can It is determined that UE-A should be in the receiving state at time slot n ₅ .

S702. The third terminal device sends the second information to the first terminal device. Correspondingly, the first terminal device receives the second information from the third terminal device.

The second information is used to share the first COT with the first terminal device, and the time-frequency resources in the first COT include the second resource. The time domain positions of the second resource and the first resource overlap. Further, the frequency domain positions of the second resource and the first resource do not overlap.

Optionally, before step S702, the third terminal device may perform LBT to obtain the first COT, and send the second information to the first terminal device on the time-frequency resources within the first COT.

For example, the second information may be carried in COT-share signaling. The second information may indicate the time domain location and/or frequency domain location of the second resource.

Optionally, the third terminal device may share the second resource in the first COT with the first terminal device under various circumstances.

As a possible implementation, the third terminal device may share the second resource in the first COT with the first terminal device based on the resource reservation of the first terminal device. For example, before step S702, the first terminal device may send information for reserving the second resource to the third terminal device. After receiving the information, the third terminal device may learn that the first terminal device needs to send data on the second resource. , and the second resource is a time-frequency resource in the first COT. Further, the first terminal device may also send the priority corresponding to the data to be sent on the second resource to the third terminal device.

Illustratively, as shown in Figure 8, taking the third terminal device as UE-C as an example, assuming that UE-A has a data transmission requirement before time slot n ₁ , UE-A can perform LBT to determine that channel 3 is idle, and Successfully seize channel 3 and obtain the COT of channel 3.

Afterwards, in time slot n ₁ , UE-A sends information to UE-C, and the information may include data #2 and information for reserving the second resource. For example, data #2 may be carried on the PSSCH, and the information used to reserve the second resource may be carried on the PSCCH. Data #2 may be data of the second periodic service. The resources reserved by UE-A are used to transmit data of the second periodic service, That is, the second resource can be used to transmit data of the second periodic service. Of course, the second resource can also be used to transmit non-periodic services. For example, when UE-A determines before time slot n ₁ that it needs to transmit data of a certain non-periodic service in time slot n ₅ , it may also send the information for reserving the second resource in time slot n ₁ .

For example, the information for reserving the second resource may include at least one of a time domain resource indication value and a frequency domain resource indication value. The time domain resource indication value is used to indicate the time domain position of the second resource, such as the time domain starting position, time domain duration, etc. The frequency domain resource indication value is used to indicate the frequency domain location of the second resource. Further, the information may also include the priority value of the second periodic service, the period of the second periodic service, etc.

After receiving the information sent by UE-A in time slot n ₁ , UE-C can learn the time-frequency domain location information of the second resource reserved by UE-A. Further, the priority corresponding to the data to be sent by UE-A on the second resource can be obtained.

Assume that after the COT of channel 3 acquired by UE-A before time slot n ₁ ends and before time slot n ₂ , UE-C has a need to send data packets, then UE-C can perform LBT. If UE-C determines that channel 3 is idle after performing LBT, and successfully seizes channel 3 to obtain the first COT, then UE-C can use the time-frequency resources in the first COT (the time domain position is located in time slot n ₃ , frequency The second information is sent to the first terminal device on the domain location located within channel 3). When UE-C receives the information for reserving the second resource from UE-A in time slot n ₁ , the second information may be 1-bit response information. For example, the value of the 1-bit is 1 or When 0, it indicates that UE-C agrees to share the second resource reserved by the first terminal device with UE-A.

In this possible implementation, after the third terminal device obtains the priority corresponding to the data that the first terminal device will send on the second resource, if the priority is higher than the time-frequency resource that the third terminal device will send in the first COT, then the third terminal device can send the second information. If the priority is lower than the priority corresponding to the data to be sent by the third terminal device on the time-frequency resource in the first COT, the third terminal device may not send the second information, that is, the third terminal device may not send the second information to the first terminal device. information. At this time, the third terminal device may send data on the second resource.

As another possible implementation, when there are remaining time-frequency resources in the first COT acquired by the third terminal device, the third terminal device may share the second resource in the first COT with the first terminal device. For example, when the time-frequency resources excluding the second resources in the first COT are sufficient to carry the data to be sent by the third terminal device, the third terminal device can send the above-mentioned second information.

Optionally, after receiving the second information from the third terminal device, the first terminal device may parse the second information and determine, based on the second information, the time domain location corresponding to the second resource where the first terminal device should In sending status.

It should be noted that there is no strict order of execution of the above steps S701 and S702. Step S701 can be executed first and then step S702; or step S702 can be executed first and then step S701; or steps S701 and S701 can be executed simultaneously. Step S702, this application does not specifically limit this.

S703. The first terminal device sends the second data to the third terminal device on the second resource. Correspondingly, the third terminal device receives the second data from the first terminal device on the second resource.

When the first terminal device is a half-duplex device, since the first terminal device does not have the ability to transmit and receive at the same time, when the first terminal device sends the second data on the second resource, it cannot receive it. That is, the first terminal device does not receive the first data from the second terminal device on the first resource. In other words, the first terminal device gives up receiving the first data from the second terminal device on the first resource.

Optionally, before step S703 and after steps S701 and S702, the first terminal device may determine that: at the time domain location corresponding to the first resource and the second resource, the first terminal device should be in both a receiving state and a sending state. state. In the case where the first terminal device is a half-duplex device, since the first terminal device does not have the ability to transmit and receive at the same time, the first terminal device needs to make a transceiver decision, that is, the first terminal device needs to determine whether to use the first resource and the third resource. The time domain position corresponding to the second resource, whether the first terminal device is actually in the receiving state or the sending state.

Optionally, since the second resource is a resource shared by the third terminal device to the first terminal device, in order to reduce the The risk of the device losing the first COT is that the first terminal device may determine to send data on the second resource and not receive data on the first resource. That is, the first terminal device may determine that the time domain location corresponding to the first resource and the second resource is in the sending state. After that, the above step S703 is executed.

Optionally, the first terminal device sends the second data on the second resource, which may include: the first terminal device accesses the channel through Type 2A LBT or Type 2B LBT or Type 2C LBT, and sends the second data on the second resource. Second data.

Optionally, when the first terminal device does not receive the first data from the second terminal device on the first resource, the second terminal device may sense that the first data transmission fails. Subsequently, the second terminal device can retransmit the first data.

Based on this solution, the first terminal device needs to receive data on the first resource and send data on the second resource, and the second resource is a resource in the first COT shared by the third terminal device to the first terminal device. , the first terminal device selects to send data to the third terminal device on the second resource. At this time, if there are other terminal devices performing LBT, since the first terminal device has sent data on the second resource, other terminal devices may detect that the channel where the second resource is located is busy, and thus will not seize the second resource. channel, thereby reducing the risk of losing the first COT of the third terminal device, so that the third terminal device can still send data on the time-frequency resources in the first COT. And because the channel where the second resource is located is not preempted by other terminal devices, data subsequently sent by the third terminal device can be successfully transmitted, thereby ensuring the service quality of the third terminal device.

In some embodiments of the method shown in Figure 7, the first terminal device can make a sending and receiving decision based on priorities. For example, when the first priority value is lower than or equal to the priority value corresponding to the first data, the first terminal device determines that the time domain position corresponding to the first resource and the second resource is in the sending state.

That is to say, the first terminal device sending the second data to the third terminal device on the second resource may include: when the first priority value is lower than or equal to the priority value corresponding to the first data, the first terminal device Send the second data to the third terminal device on the second resource.

Optionally, if the first priority value is higher than the priority value corresponding to the first data, the first terminal device receives the first data from the second terminal device on the first resource.

Among them, the first priority value is one of the following items:

1) The priority value corresponding to the second data.

Optionally, the priority value corresponding to the second data can also be understood as the priority value of the service to which the second data belongs. For example, when the second data is data of the second periodic service, the priority value corresponding to the second data can also be understood as the priority of the second periodic service.

2) The priority value corresponding to the first COT.

Optionally, the priority value corresponding to the first COT is the lowest priority value among the priority values corresponding to the data in the first COT. The data in the first COT includes second data.

Exemplarily, the data in the first COT includes data (to be) sent by the third terminal device on the time-frequency resources in the first COT, and the time-frequency resources in the first COT shared by the third terminal device to other terminal devices. The data to be sent.

As shown in FIG. 9 , it is assumed that the third terminal device shares the second resource in the first COT with the first terminal device and shares the resource R1 in the first COT with the fourth terminal device. Then, the data to be sent on the time-frequency resource in the first COT shared by the third terminal device to other terminal devices includes: second data and data to be sent on the resource R1 by the fourth terminal device.

If the priority value corresponding to the data to be sent by the third terminal device on the time-frequency resource in the first COT is equal to 3, and the priority value of the second data is equal to 3, the fourth terminal device will correspond to the data sent on the resource R1. The priority value of is equal to 1, then the priority value corresponding to the first COT is equal to 1.

Based on this solution, the priority value corresponding to the first COT is set to the lowest priority value among the priority values corresponding to the data in the first COT. When the first terminal device makes a sending and receiving decision based on the priority, because the first COT The corresponding priority value is lower, therefore, it is possible to increase the probability that the first terminal device determines the status of the time domain location corresponding to the first resource and the second resource as the sending status, so that the first terminal device sends data on the second resource as much as possible. It is possible to ensure that the first COT of the third terminal device will not be lost. For example, based on the above example, when the priority value corresponding to the first data is equal to 2 and the priority value corresponding to the first COT is equal to 1, the first terminal device can determine the time domain position corresponding to the first resource and the second resource. In sending status.

Optionally, the priority value corresponding to the first COT may be indicated by the third terminal device to the first terminal device. For example, it may be indicated by the second information, that is, the second information is also used to indicate the priority value corresponding to the first COT. Of course, the priority value corresponding to the first COT can also be indicated in other information besides the second information, and this application does not specifically limit this.

3) Priority value of network configuration.

Optionally, the priority value of the network configuration may be determined by the access network device, or may be determined by the core network device, which is not specifically limited in this application.

Optionally, when the first terminal device is in the network coverage area, the access network device can configure the priority value to the first terminal device through radio resource control (RRC) signaling.

Optionally, the network can configure a lower priority value to the first terminal device to ensure that the first COT of the third terminal device will not be lost as much as possible.

4) Preconfigured priority value.

As a possible implementation, the preconfigured priority value may be protocol-defined, or alternatively, may be regulatory-defined. At this time, the priority value can be pre-configured to the first terminal device in the form of software when the first terminal device leaves the factory. If the protocol or regulations change subsequently, the preconfigured priority value in the first terminal device can be updated through software update.

As another possible implementation, the preconfigured priority value may be configured by the core network device in a scenario without network coverage. At this time, after receiving the configuration information of the core network device, the access network device can transparently transmit the configuration information to the first terminal device to pre-configure the priority value to the first terminal device. Optionally, the core network device can also update the preconfigured priority.

Optionally, the preconfigured priority value may be a lower priority value to ensure that the first COT of the third terminal device will not be lost as much as possible.

In some embodiments of the method shown in Figure 7, as shown in Figure 7, the method may also include the following step S704:

S704. The first terminal device sends the first resource reservation information on the second resource.

The first resource reservation information is used to indicate: the priority of the first data to be sent by the first terminal device, and/or the resources used to carry the first data to be sent. The first data to be sent and the second data may belong to the same service. Of course, the first data to be sent and the second data may also belong to different services, which is not specifically limited in this application.

Optionally, if the first terminal device still needs to send data after the second data, the first terminal device may perform step S704.

Optionally, the second resource may include PSSCH and PSCCH. The second data in step S703 may be carried on the PSSCH, and the first resource reservation information in step S704 may be carried on the PSCCH.

Based on this solution, if the resource used to carry the first data to be sent is located in the COT of another terminal device, and the terminal device receives the first resource reservation information, then the terminal device can share the resource used to carry the first data to the first terminal device. A resource for data to be sent enables the first terminal device to send the first data to be sent, thereby reducing the transmission delay caused by a busy channel.

Optionally, the first terminal device may perform LBT again and obtain the COT before the time domain positions corresponding to the first resource and the second resource. If the COT obtained by the first terminal device includes resource R2, the time domain position of resource R2 and the first resource The time domain positions of the source and the second resource overlap, and the first terminal device will send data on resource R2, then the first terminal device needs to make a sending and receiving decision on the first resource, the second resource, and resource R2.

Illustratively, based on the example shown in Figure 8, as shown in Figure 10, UE-A can determine that channel 2 is idle after performing LBT before time slot n ₄ , and successfully seizes channel 2, and obtains the COT of channel 2. The time-frequency resources in the COT of channel 2 include resource R2, and the time domain position of resource R2 overlaps with the time domain positions of the first resource and the second resource.

Optionally, in this scenario, for the first terminal device, since the second resource is a shared resource, the first terminal device can still determine to send the second data on the second resource and give up receiving the first data on the first resource. data, and give up sending data on resource R.

Alternatively, in this scenario, the first terminal device can make sending and receiving decisions based on priorities. For example, when the first priority value is lower than or equal to the priority value corresponding to the first data and lower than or equal to the priority value corresponding to the data to be sent on resource R, it is determined to send the second data on the second resource .

When the first priority value is higher than the priority value corresponding to the first data and higher than the priority value corresponding to the data to be sent on resource R, you can continue to use the priority value corresponding to the first data and the priority value to be sent on resource R. The priority value corresponding to the sent data is used to make sending and receiving decisions.

The method shown in Figure 7 reduces the risk of COT loss from the aspect of sending and receiving decisions. In addition, this application also provides a data transmission method to reduce the risk of COT loss from the aspect of power allocation. As shown in Figure 11, the data sending method may include the following steps:

S1101. The first terminal device determines the second COT.

Among them, the time-frequency resources in the second COT include third resources. The third resource is used to transmit third data. It can be understood that for the first terminal device, the third resource is a preempted resource.

Optionally, before step S1101, the first terminal device may have a need to send data, so that the first terminal device may perform LBT to seize the channel and obtain the COT of the channel, that is, the second COT. For example, the first terminal device can use the above-mentioned Type 1 LBT or Type 2A LBT or Type 2B LBT or Type 2C LBT. Of course, other types of LBT can also be used, and this application does not specifically limit this.

For example, taking the first terminal device as UE-A as an example, as shown in Figure 12, before time slot n ₆ , UE-A can perform LBT on channel 2. Assuming that channel 2 is idle, UE-A can Successfully seizes channel 2 in time slot n ₆ and obtains the second COT. In addition, in FIG. 12 , the time domain position of the third resource is time slot n ₇ as an example for explanation.

Optionally, after the first terminal device determines the second COT, it can be determined that the first terminal device should be in the sending state on the third resource in the second COT.

S1102. The second terminal device sends the third information to the first terminal device. Correspondingly, the first terminal device receives the third information from the second terminal device.

Wherein, the third information is used to share the third COT with the first terminal device. The time-frequency resources in the third COT include fourth resources. The time domain positions of the fourth resource and the third resource overlap. The fourth resource is used to transmit fourth data. It can be understood that for the first terminal device, the fourth resource is a shared resource.

Optionally, before step S1102, the second terminal device may perform LBT to obtain the third COT, and send the third information to the first terminal device on the time-frequency resources in the third COT.

For example, the third information may be carried in COT-share signaling. The third information may indicate the time domain location and/or frequency domain location of the fourth resource.

Optionally, the second terminal device may share the fourth resource in the third COT with the first terminal device under various circumstances.

As a possible implementation, the second terminal device may share the fourth resource in the third COT with the first terminal device based on the resource reservation of the first terminal device. For example, before step S1102, the first terminal device may send a request to the second terminal device Information for reserving the fourth resource is sent, and the second terminal device shares the fourth resource in the third COT with the first terminal device based on the information. Reference may be made to the relevant description in step S702 above, which will not be described again here.

Illustratively, as shown in Figure 12, taking the second terminal device as UE-B as an example, assuming that UE-A has a data transmission requirement before time slot n ₀ , UE-A can perform LBT to determine that channel 1 is idle, and Successfully preempted channel 1 and obtained the COT of channel 1.

Afterwards, in time slot n ₀ , UE-A sends information to UE-B, and the information may include data #3 and information for reserving the fourth resource. For example, data #3 may be carried on the PSSCH, and the information used to reserve the fourth resource may be carried on the PSCCH. Data #3 may be data of the third periodic service. The resources reserved by UE-A can be used to transmit data of the third periodic service, that is, the fourth resources can be used to transmit data of the third periodic service. Of course, the fourth resource can also be used to transmit non-periodic services. For the information used to reserve the fourth resource, reference may be made to the above-mentioned description of the information used to reserve the second resource, which will not be described again here.

After receiving the information sent by UE-A in time slot n ₀ , UE-B can learn the time-frequency domain location information of the fourth resource reserved by UE-A. Further, the priority corresponding to the fourth data to be sent by UE-A on the fourth resource can be obtained.

Assuming that UE-B has a data packet sending requirement before time slot n ₂ , UE-B can perform LBT. If UE-B determines that channel 1 is idle after performing LBT, and successfully seizes channel 1 to obtain the third COT, then UE-B can use the time-frequency resources in the third COT (the time domain position is located in time slot n ₃ , frequency The third information is sent to the first terminal device on a domain location located within channel 1).

In this possible implementation, after the second terminal device obtains the priority corresponding to the fourth data to be sent by the first terminal device on the fourth resource, the second terminal device may send the priority of the fourth data to the third COT according to the priority of the fourth data and the priority of the second terminal device on the third COT. To determine whether to share the fourth resource in the third COT with the first terminal device according to the priority corresponding to the data sent on the time-frequency resource in the third COT, refer to the relevant description in the above step S702, which will not be described again here.

As another possible implementation, when there are remaining time-frequency resources in the third COT acquired by the second terminal device, the second terminal device may share the fourth resource in the third COT with the first terminal device. Reference may be made to the relevant description in step S702 above, which will not be described again here.

Optionally, after receiving the third information from the second terminal device, the first terminal device may parse the third information and determine, based on the third information, the time domain location corresponding to the fourth resource where the first terminal device should In sending status.

It should be noted that there is no strict order of execution of the above-mentioned steps S1101 and step S1102. Step S1101 can be executed first and then step S1102; or step S1102 can be executed first and then step S1101; or step S1101 and step S1101 can be executed simultaneously. Step S1102, this application does not specifically limit this.

S1103. The first terminal device uses the first transmission power to send third data on the third resource, and uses the second transmission power to send the fourth data on the fourth resource. Wherein, the second transmission power is greater than or equal to the first transmission power.

Optionally, the first terminal device sends the fourth data on the fourth resource, which may include: the first terminal device accesses the channel through Type 2A LBT or Type 2B LBT or Type 2C LBT, and sends the fourth data on the fourth resource. Fourth data.

Optionally, the first terminal device can also send the second resource reservation information on the third resource. The second resource reservation information is used to indicate: the priority of the second data to be sent by the first terminal device, and/or the resources used to carry the second data to be sent. The second data to be sent and the third data may belong to the same service. Of course, the second data to be sent and the third data may also belong to different services, and this application does not specifically limit this.

Optionally, if the first terminal device still needs to send data after the third data, the first terminal device can send the second resource reservation information.

Optionally, the third resource may include PSSCH and PSCCH. The third data in step S1103 may be carried on the PSSCH, and the second resource reservation information may be carried on the PSCCH.

Based on this solution, when the first terminal device needs to transmit data on the third resource and the fourth resource simultaneously, a larger second transmission power is allocated to the fourth resource. At this time, if there are other terminal devices performing LBT, since the second transmission power corresponding to the fourth resource is relatively large, the energy detected by other terminal devices may be greater than the energy detection threshold, so other terminal devices can determine the channel where the fourth resource is located. Busy, so that the channel where the fourth resource is located will not be preempted, and the risk of losing the third COT of the second terminal device is reduced, so that the second terminal device can still send data on the time-frequency resource in the third COT in the future. Moreover, since the channel where the fourth resource is located is not preempted by other terminal devices, subsequent data sent by the second terminal device can be successfully transmitted, thereby ensuring the service quality of the second terminal device.

Optionally, before step S1103 and after steps S1101 and S1102, the first terminal device may determine that: the first terminal device should send the third data on the third resource, and the first terminal device should send the fourth data on the fourth resource. That is, the first terminal device should send data on both resources simultaneously. At this time, the first terminal device needs to perform power allocation and determine the transmit power corresponding to the two resources.

Optionally, the first terminal device may determine the first transmission power and the second transmission power according to the first rule. The first rule may include: when the resources used to send data include preempted resources and shared resources, the sending power corresponding to the shared resources is greater than or equal to the sending power corresponding to the preempted resources, and the sending power corresponding to the shared resources is equal to the sending power corresponding to the preempted resources. The sum is less than or equal to the maximum transmit power of the first terminal device.

Since for the first terminal device, the third resource is a preempted resource and the fourth resource is a shared resource, the first terminal device can determine that the transmit power corresponding to the fourth resource (ie, the second transmit power) is greater than or equal to the corresponding transmit power of the third resource. The transmission power (i.e. the first transmission power).

Optionally, for the power values of the first transmit power and the second transmit power, the first terminal device may first determine a larger power value for the second transmit power. After determining the power value of the second transmission power, the difference between the maximum transmission power of the first terminal device and the power value of the second transmission power may be used as the power value of the first transmission power.

As a possible implementation, the first terminal device may determine that the power value of the second transmission power is greater than a certain threshold, and the threshold may be greater than or equal to Among them, P _1,MAX is the maximum transmit power of the first terminal device.

As another possible implementation, the first terminal device may determine the power value of the second transmission power according to the power control information from the second terminal device. That is, the second terminal device may send power control information to the first terminal device, and the power control information is used to determine the second transmission power. Optionally, the power control information can be carried in third information.

For example, the power control information may indicate a certain power value, and the first terminal device may determine that the power value of the second transmission power is greater than or equal to the power value indicated by the power control information.

For example, the power control information may indicate the maximum transmit power corresponding to the third COT. The maximum transmit power corresponding to the third COT may be the maximum transmit power used by the second terminal device in the third COT, or may be the maximum transmit power that the second terminal device can achieve.

As shown in FIG. 13 , for example, the second terminal device shares the fourth resource in the third COT with the first terminal device, and the second terminal device sends data on resources R3 and R4 in the third COT. When the transmit power corresponding to resource R3 is 3 and the transmit power corresponding to resource R4 is 4, the power control information may indicate the transmit power 4 corresponding to resource R4.

It can be understood that the power value of the second transmission power determined by the first terminal device according to the power control information may also be greater than or equal to

Based on this solution, the power control information of the second terminal device can indicate the maximum transmit power corresponding to the third COT, so that the first terminal device can set the second transmit power to a larger transmit power to avoid the second transmit power being too low. This causes other terminal equipment to seize the channel where the fourth resource is located, thereby causing the third COT of the second terminal equipment to be lost.

Optionally, when the first terminal device needs to send data on multiple shared resources at the same time, it can send data based on the multiple shared resources. Power is allocated based on the priority corresponding to the data to be sent on the source. For example, as shown in Figure 14, based on the method shown in Figure 11, the following step S1104 may also be included:

S1104. The third terminal device sends fourth information to the first terminal device. Correspondingly, the first terminal device receives the fourth information from the third terminal device.

The fourth information is used to share a fourth COT with the first terminal device, and the time-frequency resources in the fourth COT include fifth resources. The time domain positions of the fifth resource and the fourth resource overlap. The fifth resource is used to transmit fifth data. It can be understood that, for the first terminal device, the fifth resource is a shared resource.

Optionally, before step S1104, the third terminal device may perform LBT to obtain the fourth COT, and send the fourth information to the first terminal device on the time-frequency resources within the fourth COT.

Optionally, the third terminal device may share the fifth resource in the fourth COT with the first terminal device under various circumstances.

As a possible implementation, the third terminal device may share the fifth resource in the fourth COT with the first terminal device based on the resource reservation of the first terminal device. For example, before step S1104, the first terminal device may send information for reserving the fifth resource to the third terminal device, and the second terminal device may share the fifth resource in the fourth COT with the first terminal device based on the information. Refer to the relevant description in step S702 above, which will not be described again here.

Illustratively, based on the example shown in Figure 12, taking the third terminal device as UE-C as an example, as shown in Figure 15, assuming that UE-A has a data transmission requirement before time slot n ₁ , UE-A can Perform LBT to confirm that channel 3 is idle, successfully seize channel 3, and obtain the COT of channel 3.

Afterwards, in time slot n ₁ , UE-A sends information to UE-C, which information may include data #4 and information for reserving the fifth resource. For example, data #4 may be carried on the PSSCH, and the information used to reserve the fifth resource may be carried on the PSCCH. Data #4 may be data of the fourth periodic service. The resources reserved by UE-A can be used to transmit data of the fourth periodic service, that is, the fifth resources can be used to transmit data of the fourth periodic service. Of course, the fifth resource can also be used to transmit non-periodic services. For the information used to reserve the fifth resource, reference may be made to the above-mentioned description of the information used to reserve the second resource, which will not be described again here.

After receiving the information sent by UE-A in time slot n ₁ , UE-C can learn the time-frequency domain location information of the fifth resource reserved by UE-A. Further, the priority corresponding to the fifth data to be sent by UE-A on the fifth resource can be obtained.

Assuming that UE-C has a data packet sending requirement before time slot n ₄ , then UE-C can perform LBT. If UE-C determines that channel 3 is idle after performing LBT, and successfully seizes channel 3 to obtain the fourth COT, then UE-C can use the time-frequency resources in the fourth COT (the time domain position is located in time slot n ₅ , frequency The fourth information is sent to the first terminal device on a domain location located within channel 3).

In this possible implementation, after the third terminal device obtains the priority corresponding to the fifth data to be sent by the first terminal device on the fifth resource, the third terminal device may send the priority of the fifth data to the fourth COT according to the priority of the fifth data. To determine whether to share the fifth resource in the fourth COT with the first terminal device according to the priority corresponding to the data sent on the time-frequency resource in the fourth COT, refer to the relevant description in the above step S702, which will not be described again here.

As another possible implementation, when there are remaining time-frequency resources in the fourth COT acquired by the third terminal device, the third terminal device may share the fifth resource in the fourth COT with the first terminal device. Reference may be made to the relevant description in step S702 above, which will not be described again here.

Optionally, after receiving the fourth information from the third terminal device, the first terminal device can parse the fourth information and determine, based on the fourth information, the time domain location corresponding to the fifth resource. The first terminal device should In sending status.

It should be noted that the above steps S1101, S1102 and S1104 are not executed in a strict order, and step S1103 is executed after the steps S1101, S1102 and S1104.

S1105. The first terminal device uses the third transmission power to send fifth data on the fifth resource.

Optionally, after step S1101, step S1102, and step S1104 and before step S1103, the first terminal device may determine that: the first terminal device should send the third data on the third resource and the third data on the fourth resource. Four data, and fifth data should be sent on the fifth resource. That is, the first terminal device should send data on three resources simultaneously. At this time, the first terminal device needs to perform power allocation and determine the transmit power corresponding to the three resources.

Optionally, among the three resources, the fourth resource and the fifth resource are shared resources. According to the above first rule, the transmission power corresponding to the fourth resource and the fifth resource should be greater than or equal to the transmission power corresponding to the third resource. . For the fourth resource and the fifth resource, the first terminal device may perform power allocation according to the second rule.

For example, the second rule may include: when the resource for sending data includes multiple shared resources, and the priority value corresponding to the first shared resource is lower than or equal to the priority value corresponding to the second shared resource, the first shared resource The transmission power corresponding to the resource is greater than or equal to the transmission power corresponding to the second shared resource. The priority value corresponding to the shared resource may be the priority value corresponding to the data to be transmitted on the shared resource.

Based on the second rule, when the priority value corresponding to the fourth data is lower than or equal to the priority value corresponding to the fifth data, the second transmission power is greater than or equal to the third transmission power, and the third transmission power is greater than or equal to the third transmission power. One transmit power. When the priority value corresponding to the fourth data is higher than the priority value corresponding to the fifth data, the third transmission power is greater than or equal to the second transmission power, and the second transmission power is greater than or equal to the first transmission power.

Optionally, the method for determining the power value of the third transmission power may refer to the above-mentioned method for determining the power value of the second transmission power, which will not be described again here.

Based on this solution, when there are multiple shared resources, power allocation can be performed based on the priority values corresponding to the multiple shared resources, thereby reducing the risk of COT loss where the corresponding higher-priority shared resources are located.

The above method shown in Figure 11 or Figure 14 can be understood as when the first terminal device needs to send data on multiple resources at the same time, and the maximum sending power of the first terminal device can support the transmission of data on the multiple resources, the first terminal device needs to send data on multiple resources at the same time. A power allocation method or data transmission method for a terminal device. In addition, this application also provides a data sending method, which may be applicable to the situation where the maximum sending power of the first terminal device cannot support simultaneous sending of data on the multiple resources. Referring to Figure 16, the data sending method may include the following steps:

S1601. The first terminal device determines the fifth COT.

Among them, the time-frequency resources in the fifth COT include the sixth resource. The sixth resource is used to transmit sixth data. It can be understood that for the first terminal device, the sixth resource is a preempted resource.

Optionally, after the first terminal device determines the fifth COT, it can be determined that the first terminal device should be in the sending state on the sixth resource in the fifth COT.

S1602. The second terminal device sends fifth information to the first terminal device. Correspondingly, the first terminal device receives the fifth information from the second terminal device.

Wherein, the fifth information is used to share the sixth COT with the first terminal device, and the time-frequency resources in the sixth COT include the seventh resource. The seventh resource is used to send seventh data. The temporal positions of the seventh resource and the sixth resource overlap.

Optionally, before step S1602, the second terminal device may perform LBT to obtain the fifth COT, and send the fifth information to the first terminal device on the time-frequency resources within the fifth COT. Reference may be made to the relevant description of step S1102 above, which will not be described again here.

Optionally, after receiving the fifth information from the second terminal device, the first terminal device can parse the fifth information, and determine, based on the fifth information, the time domain location corresponding to the seventh resource where the first terminal device should In sending status.

It should be noted that there is no strict order of execution of the above-mentioned steps S1601 and step S1602. Step S1601 can be executed first, and then step S1602; or step S1602 can be executed first, and then step S1601; or steps S1601 and step S1601 can be executed simultaneously. Step S1602, this application does not specifically limit this.

S1603. The first terminal device sends seventh data on the seventh resource.

Further, the first terminal device does not send the sixth data on the sixth resource. In other words, the first terminal device gives up sending the sixth data on the sixth resource.

Optionally, the first terminal device may use the fourth transmission power to send the seventh data on the seventh resource.

Optionally, before step S1603 and after steps S1601 and S1602, the first terminal device may determine that: the first terminal device should send sixth data on the sixth resource, and should send seventh data on the seventh resource. That is, the first terminal device should send data on both resources simultaneously. At this time, the first terminal device needs to perform power allocation.

Optionally, if the transmission power of the first terminal device is limited and only supports sending data on one channel at the same time, then, since for the first terminal device, the sixth resource is a preemption resource and the seventh resource is a shared resource, , the first terminal device may determine to send the seventh data on the seventh resource, and give up sending the sixth data on the sixth resource.

Regarding the power for transmitting the seventh data on the seventh resource (ie, the fourth transmit power), as a possible implementation, the fourth transmit power may be equal to the maximum transmit power that the first terminal device can use.

As another possible implementation, the second terminal device may send power control information used to determine the fourth transmission power to the first terminal device. After receiving the power control information, the first terminal device can determine the fourth transmission power according to the power control information.

For example, the power control information may indicate the maximum transmit power corresponding to the fifth COT. Reference may be made to the relevant description of the maximum transmit power corresponding to the third COT mentioned above, which will not be described again here.

Optionally, the first terminal device may also send third resource reservation information on the seventh resource. The third resource reservation information is used to indicate: the priority of the third data to be sent by the first terminal device, and/or the resources used to carry the third data to be sent. The third data to be sent and the seventh data may belong to the same service. Of course, the second data to be sent and the third data may also belong to different services, and this application does not specifically limit this.

Optionally, if the first terminal device still needs to send data after the seventh data, the first terminal device may send the third resource reservation information.

Optionally, the seventh resource may include PSSCH and PSCCH. The seventh data in step S1603 may be carried on the PSSCH, and the third resource reservation information may be carried on the PSCCH.

Based on this solution, if the resource used to carry the third data to be sent is located in the COT of another terminal device, and the terminal device receives the third resource reservation information, then the terminal device can share the resource used to carry the third data to be sent with the first terminal device. The resource of three data to be sent enables the first terminal device to send the third data to be sent, thereby reducing the transmission delay caused by a busy channel.

Optionally, when the first terminal device needs to send data on multiple shared resources at the same time, power allocation can be performed according to the priorities corresponding to the data to be sent on the multiple shared resources. For example, as shown in Figure 17, based on the method shown in Figure 16, the following step S1604 may also be included:

S1604. The third terminal device sends the sixth information to the first terminal device. Correspondingly, the first terminal device receives the sixth information from the third terminal device.

The sixth information is used to share a seventh COT with the first terminal device, and the time-frequency resources in the seventh COT include the eighth resource. The eighth resource is used to transmit eighth data. The time domain positions of the seventh resource and the eighth resource overlap. It can be understood that, for the first terminal device, the eighth resource is a shared resource.

Optionally, before step S1604, the third terminal device may perform LBT to obtain the seventh COT, and send the sixth information to the first terminal device on the time-frequency resources within the seventh COT.

Optionally, the third terminal device may share the eighth resource in the seventh COT with the first terminal device under various circumstances. Reference may be made to the relevant description in step S1104 above, which will not be described again here.

Optionally, after receiving the sixth information from the third terminal device, the first terminal device can parse the sixth information, and determine, based on the sixth information, the time domain location corresponding to the eighth resource, where the first terminal device should In sending status.

It should be noted that the above steps S1601, S1602 and S1604 are not executed in a strict order, and step S1603 is executed after step S1601, step S1602 and step S1604.

Optionally, after step S1601, step S1602, and step S1604, and before step S1603, the first terminal device may determine that: the first terminal device should send the sixth data on the sixth resource, and should send the sixth data on the seventh resource. Seven data, and eighth data should be sent on the eighth resource. That is, the first terminal device should send data on three resources simultaneously. At this time, the first terminal device needs to perform power allocation.

Optionally, if the transmission power of the first terminal device is limited and only supports sending data on one channel at the same time, then, since for the first terminal device, the sixth resource is a preemption resource, the seventh resource and the eighth resource are Shared resources, therefore, the first terminal device may determine to send the seventh data on the seventh resource or send the eighth data on the eighth resource, and give up sending the sixth data on the sixth resource.

Further, the first terminal device may determine whether to send the seventh data on the seventh resource or the eighth data on the eighth resource according to the priority.

For example, when the second priority value is lower than or equal to the third priority value, the first terminal device sends the seventh data on the seventh resource. When the second priority value is higher than the third priority value, the first terminal device sends eighth data on the eighth resource. This application uses an example in which the second priority value is lower than or equal to the third priority value.

The second priority value may be one of the following: a priority value corresponding to the seventh data, a priority value corresponding to the sixth COT, a network configured priority value, or a preconfigured priority value. .

For example, the priority value corresponding to the sixth COT is the lowest priority value among the priority values corresponding to the data in the sixth COT, and the data in the sixth COT includes seventh data. When the second priority value includes the priority value corresponding to the sixth COT, the fifth information is also used to indicate the priority value corresponding to the sixth COT.

The third priority value may be one of the following: a priority value corresponding to the eighth data, a priority value corresponding to the seventh COT, a network configured priority value, or a preconfigured priority value. .

For example, the priority value corresponding to the seventh COT is the lowest priority value among the priority values corresponding to the data in the seventh COT, and the data in the seventh COT includes the eighth data. When the third priority value includes the priority value corresponding to the seventh COT, the sixth information is also used to indicate the priority value corresponding to the seventh COT.

For detailed descriptions of the second priority value and the third priority value, please refer to the above-mentioned related description of the first priority value, which will not be described again here.

In addition to the above data sending method, this application also provides related implementation of the SL resource pool (hereinafter referred to as the resource pool) in the unlicensed frequency band. This is explained below.

Optionally, the resource pool includes at least one channel. For example, as shown in Figure 18a, resource pool #1 may include 4 channel. As shown in Figure 18b, resource pool #2 may include 1 channel.

For example, the bandwidth of each channel in the resource pool may be 20 megahertz (MHz). Of course, the bandwidth of the channel can also be other values, which is not specifically limited in this application.

Optionally, a channel cannot be in different resource pools at the same time. For example, channel #1 cannot be in both resource pool #1 and resource pool #2.

Optionally, the channel can be divided into multiple sub-channels. The size of the sub-channel may be, for example: 10, 12, 15, 20, 25, 50, 75 or 100 physical resource blocks (PRBs). Wherein, the PRBs included in the sub-channel may be continuous or interlaced.

For example, when the PRBs included in the sub-channel are interleaved PRBs, the sub-channel m, m∈{0,1,…M-1} can be defined, and the index of the PRB included in the sub-channel m can be {m, M+m,2M+m,3M+m,...}. Among them, M is a constant, and its value can be determined by the subcarrier spacing.

Illustratively, as shown in Figure 19, (a) in Figure 19 shows an example in which interleaved PRBs are included in the sub-channel. (b) in FIG. 19 shows an example in which continuous PRBs are included in the subchannel.

Optionally, for a certain channel, the channel may include a guard PRB, which is not used for data/signaling transmission. PRBs other than protection PRBs may constitute a common PRB set. Sub-channels can be divided based on common PRB sets. In this application, unless otherwise specified, RB refers to PRB. Therefore, the descriptions of RB and PRB can be interchanged.

For a resource pool that includes multiple channels, subchannels included in different channels can be numbered consecutively. For example, channel #1 includes sub-channels numbered from 1 to 10, channel #2 may have sub-channel numbers 11 to 20, channel #3 may have sub-channel numbers 21 to 30, and so on.

In addition, if the terminal device uses multiple sub-channels in the channel for simultaneous transmission, the multiple sub-channels may be continuous sub-channels or non-continuous sub-channels, which is not specifically limited in this application.

Optionally, when the resource pool is (pre)configured to disable interlace PRBs, the PRBs in the subchannel can be contiguous. When the resource pool is (pre)configured to allow the use of interlace PRBs, the PRBs in the subchannel can be interleaved.

Optionally, before sending data, the terminal device can perform LBT on at least one channel of the resource pool. After seizing the channel to obtain the COT, transmission can be performed at the sub-channel granularity. For example, after a terminal device seizes a channel, it can transmit on at least one sub-channel of the channel. Optionally, when the resource pool is (pre)configured to disable interlace PRB, if the terminal device uses multiple sub-channels within the channel for transmission, the PSCCH can be located on the sub-channel with the smallest index among the multiple sub-channels, or it can be located on the sub-channel. On the subchannel with the lowest frequency among multiple subchannels. Furthermore, in each transmission within the COT, the PSCCH is located within the same subchannel.

When the resource pool is (pre)configured to allow the use of interlace PRB, if the terminal device uses multiple sub-channels within the channel for transmission, the PSCCH can be located on the sub-channel with the smallest index among the multiple sub-channels, or it can be located on the multiple sub-channels on the lowest frequency sub-channel. In addition, the time domain starting position of the PSCCH is the same as the time domain starting position of the resource pool, or is aligned with the time domain starting position of the resource pool. In each transmission within the COT, the PSCCH is located within the same subchannel.

For example, taking the terminal equipment using two sub-channels for transmission, as shown in (a) in Figure 20, it means that the terminal equipment selects consecutive sub-channels (sub-channel #1 and sub-channel #2) for transmission, where the PSCCH is located Subchannel #1. As shown in (b) of Figure 20, it means that the terminal equipment selects non-consecutive sub-channels (sub-channel #1 and sub-channel #11) for transmission, where the PSCCH is located in sub-channel #1.

Based on the above design of PSCCH and PSSCH, PSCCH can be configured in a sub-channel, and the terminal equipment only needs to blindly decode the PSCCH in this specific sub-channel, which can reduce the power consumption of the terminal equipment.

Optionally, the above resource pool is not used to transmit periodic sidelink synchronization signals and physical broadcast channels (physical broadcast channel, PBCH) block (sidelink synchronization signal and PBCHblock, S-SSB), that is, periodic S-SSB is configured outside the above resource pool. If S-SSB is transmitted on resources in the resource pool, it may happen that the terminal device needs to receive PSCCH/PSSCH at the same time when sending S-SSB. At this time, because the terminal device is a half-duplex device, S-SSB may Failed to send. In addition, the time slot structure of S-SSB is different from that of PSCCH/PSSCH. If S-SSB is transmitted on resources in the resource pool, it will increase the implementation complexity of the terminal equipment, and the resources in the resource pool are dynamic. Preemption (or allocation) is not suitable for periodic S-SSB transmission. In other words, configuring periodic S-SSB outside the resource pool can ensure the transmission of S-SSB and reduce the implementation complexity of the terminal device.

Optionally, you can configure a bitmap to indicate the time domain resources (or time domain location) of the resource pool. For example, the bitmap may include N bits, each of the N bits may correspond to at least one time unit, and all time units corresponding to the N bits are continuous. When the value of a certain bit is equal to 1 (or 0), it means that the time unit corresponding to the bit can be used for SL transmission, or it means that the time domain resources of the resource pool include the time unit corresponding to the bit; the value of a certain bit is equal to When 0 (or 1), it means that the time unit corresponding to the bit is not used for SL transmission, or it means that the time domain resources of the resource pool do not include the time unit corresponding to the bit.

For example, the above time unit may be a time slot, an orthogonal frequency division multiplexing (OFDM) symbol, a subframe, a frame, etc., which is not specifically limited in this application.

For SL-U, each bit in the above bitmap can be configured as 1 (or 0), indicating that the time unit corresponding to each bit can be used for SL transmission. If there is a bit in the bitmap with a value of 0 (or 1), it means that the time unit corresponding to the bit is not used for SL transmission. Then the time domain resources in the resource pool are discontinuous, which may cause the terminal device to be unable to operate without authorization. COT is maintained on channels in the band. Therefore, setting each bit in the bitmap to 1 (or 0) enables the terminal device to maintain COT on the channel in the unlicensed frequency band and implement data transmission.

Optionally, there may be reserved time slots in the SL resource pool of the licensed frequency band. The reserved time slots are used to ensure that the remaining time slot resources are bits after using the mode2 resource awareness mechanism to exclude unavailable time slot resources. An integer multiple of the graph length, while determining the time slot. In the SL resource pool of the unlicensed frequency band, if each bit in the bitmap is configured as 1 (or 0), the reservation time unit is not included (or does not exist) in the resource pool.

Optionally, the configuration related to the above resource pool can be network configuration, or can be pre-configured. For descriptions of network configuration and preconfiguration, please refer to the relevant descriptions involved in the method shown in Figure 7, and will not be described again here.

Optionally, the settings of the PSCCH and PSSCH in the second resource in the method shown in Figure 7, the third resource in the method shown in Figure 11, and the seventh resource in the method shown in Figure 16 can follow the above-mentioned disabling interlace PRB Or allow setting principles when using interlace PRB. The transmission in the above-mentioned methods shown in Figures 7 to 17 can be performed at the sub-channel granularity.

It can be understood that in the above embodiments, the methods and/or steps implemented by the terminal device can also be implemented by components (such as processors, chips, chip systems, circuits, logic modules, or software that can be used in the terminal device). chip or circuit) implementation.

The above mainly introduces the solutions provided by this application. Correspondingly, this application also provides a communication device, which is used to implement the various methods mentioned above. The communication device may be the terminal device in the above method embodiment, or a device including the above terminal device, or a component that can be used in the terminal device, such as a chip or a chip system.

It can be understood that, in order to implement the above functions, the communication device includes corresponding hardware structures and/or software modules for performing each function. Persons skilled in the art should easily realize that, with the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein, the present application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a function is performed by hardware or computer software driving the hardware depends on the specific application and design constraints of the technical solution. Skilled artisans may implement the described functionality using different methods for each specific application, but such implementations should not be considered beyond the scope of this application.

Embodiments of the present application can divide the communication device into functional modules according to the above method embodiments. For example, functional modules can be divided into corresponding functional modules, or two or more functions can be integrated into one processing module. The above integrated modules can be implemented in the form of hardware or software function modules. It should be noted that the division of modules in the embodiment of the present application is schematic and is only a logical function division. In actual implementation, there may be other division methods.

Optionally, taking the communication device as the first terminal device in the above method embodiment as an example, FIG. 21 shows a schematic structural diagram of the first terminal device 210. The first terminal device 210 includes a processing module 2101 and a transceiver module 2102.

In some embodiments, the first terminal device 210 may also include a storage module (not shown in Figure 21) for storing program instructions and data.

In some embodiments, the transceiver module 2102, which may also be called a transceiver unit, is used to implement sending and/or receiving functions. The transceiver module 2102 may be composed of a transceiver circuit, a transceiver, a transceiver, or a communication interface.

In some embodiments, the transceiver module 2102 may include a receiving module and a sending module, respectively configured to perform the receiving and sending steps performed by the first terminal device in the above method embodiment, and/or to support the steps described herein. Other processes of the technology; the processing module 2101 can be used to perform the steps of the processing class (such as determining, generating, etc.) performed by the first terminal device in the above method embodiment, and/or to support the technology described herein. Other processes.

Transceiver module 2102, configured to receive first information from a second terminal device. The first information indicates resources reserved by the second terminal device. The resources include first resources. The first resources are used by the first terminal device to receive messages from the second terminal device. the first data;

The transceiver module 2102 is also used to receive second information from the third terminal device. The second information is used to share the first channel occupancy time COT with the first terminal device. The time-frequency resources in the first COT include the second resource. The time domain positions of the second resource and the first resource overlap;

The transceiving module 2102 is also configured to send the second data to the third terminal device on the second resource.

Optionally, the processing module 2101 is used to determine not to receive the first data from the second terminal device on the first resource.

Optionally, the transceiver module 2102 is configured to send the second data to the third terminal device on the second resource, including: when the first priority value is lower than or equal to the priority value corresponding to the first data, the transceiver module 2102, Used to send the second data to the third terminal device on the second resource. The first priority value is one of the following items: a priority value corresponding to the second data, a priority value corresponding to the first COT, a network configured priority value, or a preconfigured priority value.

Optionally, the transceiving module 2102 is also configured to send the first resource reservation information on the second resource. Wherein, the first resource reservation information is used to indicate the priority of the first data to be sent by the first terminal device, and/or is used to carry the resources of the first data to be sent, and the first data to be sent and the second data belong to Same business.

In other embodiments:

The processing module 2101 is used to determine the second channel occupancy time COT, and the time-frequency resources in the second COT include third resources;

The transceiver module 2102 is configured to receive third information from the second terminal device. The third information is used to share the third COT with the first terminal device. The time-frequency resources in the third COT include the fourth resource, the third resource and the third COT. The time domain positions of the four resources overlap;

The transceiver module 2102 is configured to use the first transmit power to send the third data on the third resource; the transceiver module 2102 is also configured to use the second transmit power to transmit the fourth data on the fourth resource, and the second transmit power is greater than or equal to the first Transmit power.

Optionally, the processing module 2101 is also configured to determine the first transmission power and the second transmission power according to the first rule. The first rule includes: when the resources used to send data include preempted resources and shared resources, the sending power corresponding to the shared resources is greater than or equal to the sending power corresponding to the preempted resources, and the sending power corresponding to the shared resources is equal to the sending power corresponding to the preempted resources. achievement The sum of the rates is less than or equal to the maximum transmit power of the first terminal device.

Optionally, the transceiver module 2102 is also configured to receive fourth information from the third terminal device. The fourth information is used to share the fourth COT with the first terminal device. The time-frequency resources in the fourth COT include the fifth resource. The time domain positions of the fourth resource and the fifth resource overlap; the transceiver module 2102 is also configured to use the third transmission power to send the fifth data on the fifth resource. The priority value corresponding to the fourth data is less than or equal to the priority value corresponding to the fifth data, the second transmission power is greater than or equal to the third transmission power, and the third transmission power is greater than or equal to the first transmission power.

Optionally, the transceiving module 2102 is also configured to send the second resource reservation information on the third resource. Wherein, the second resource reservation information is used to indicate the priority of the second data to be sent by the first terminal device, and/or is used to carry resources for the second data to be sent, and the second data to be sent and the third data belong to Same business.

In still other embodiments:

Processing module 2101, used to determine the fifth channel occupancy time COT;

The transceiver module 2102 is used to receive fifth information from the second terminal device. The time-frequency resources in the fifth COT include sixth resources, and the sixth resources are used to transmit sixth data. The fifth information is used to share the sixth COT with the first terminal device. The time-frequency resources in the sixth COT include the seventh resource. The seventh resource is used to transmit the seventh data. The time domain positions of the sixth resource and the seventh resource overlap. ;

The transceiver module 2102 is also used to send the seventh data on the seventh resource.

Optionally, the processing module 2101 is also used to determine not to send the sixth data on the sixth resource.

Optionally, the transceiver module 2102 is also configured to receive sixth information from the third terminal device. The sixth information is used to share the seventh COT with the first terminal device. The time-frequency resources in the seventh COT include the eighth resource. The eighth resource is used to transmit the eighth data, and the time domain positions of the seventh resource and the eighth resource overlap. The transceiver module 2102 is configured to send the seventh data on the seventh resource, including: when the second priority value is lower than or equal to the third priority value, the transceiver module 2102 is configured to send the seventh data on the seventh resource. The second priority value is one of the following items: the priority value corresponding to the seventh data, the priority value corresponding to the sixth COT, the priority value configured by the network, or the preconfigured priority value. The third priority value is one of the following items: the priority value corresponding to the eighth data, the priority value corresponding to the seventh COT, the priority value configured by the network, or the preconfigured priority value.

Optionally, the transceiving module 2102 is also configured to send third resource reservation information on the seventh resource, where the third resource reservation information is used to indicate the priority of the third data to be sent by the first terminal device, and/or, with Based on the resources carrying the third data to be sent, the third data to be sent and the seventh data belong to the same service.

All relevant content of each step involved in the above method embodiments can be quoted from the functional description of the corresponding functional module, and will not be described again here.

In this application, the first terminal device 210 is presented in the form of dividing various functional modules in an integrated manner. A "module" here may refer to an application-specific integrated circuit (ASIC), a circuit, a processor and memory that executes one or more software or firmware programs, an integrated logic circuit, and/or others that may provide the above functions. device.

In some embodiments, in terms of hardware implementation, those skilled in the art can imagine that the first terminal device 210 may take the form of the communication device 60 shown in Figure 6c.

As an example, the function/implementation process of the processing module 2101 in Figure 21 can be implemented by the processor 601 in the communication device 60 shown in Figure 6c calling the computer execution instructions stored in the memory 603. The function/implementation process of the transceiver module 2102 in Figure 21 can be implemented through the communication interface 604 in the communication device 60 shown in Figure 6c.

In some embodiments, when the first terminal device 210 in Figure 21 is a chip or chip system, the function/implementation process of the transceiver module 2102 can be implemented through the input and output interface (or communication interface) of the chip or chip system, and the processing module 2101 The function/implementation process can be realized by the processor (or processing circuit) of the chip or chip system.

Since the first terminal device 210 provided in this embodiment can perform the above method, the technical effects it can obtain can be referred to the above method embodiment, which will not be described again here.

As a possible product form, the first terminal device described in the embodiment of the present application can also be implemented using: one or more field programmable gate arrays (FPGAs), programmable logic devices (programmable logic device, PLD), controller, state machine, gate logic, discrete hardware components, any other suitable circuit, or any combination of circuits capable of performing the various functions described throughout this application.

In some embodiments, embodiments of the present application further provide a communication device, which includes a processor and is configured to implement the method in any of the above method embodiments.

As a possible implementation manner, the communication device further includes a memory. This memory is used to store necessary computer programs and data. The computer program may include instructions, and the processor may call the instructions in the computer program stored in the memory to instruct the communication device to perform the method in any of the above method embodiments. Of course, the memory may not be in the communication device.

As another possible implementation, the communication device further includes an interface circuit, which is a code/data reading and writing interface circuit. The interface circuit is used to receive computer execution instructions (computer execution instructions are stored in the memory and may be directly read from memory, or possibly through other devices) and transferred to the processor.

As yet another possible implementation manner, the communication device further includes a communication interface, which is used to communicate with modules external to the communication device.

It can be understood that the communication device may be a chip or a chip system. When the communication device is a chip system, it may be composed of a chip or may include a chip and other discrete devices. This is not specifically limited in the embodiments of the present application.

This application also provides a computer-readable storage medium on which a computer program or instructions are stored. When the computer program or instructions are executed by a computer, the functions of any of the above method embodiments are implemented.

This application also provides a computer program product, which implements the functions of any of the above method embodiments when executed by a computer.

Those of ordinary skill in the art can understand that for the convenience and simplicity of description, the specific working processes of the systems, devices and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be described again here.

It can be understood that the systems, devices and methods described in this application can also be implemented in other ways. For example, the device embodiments described above are only illustrative. For example, the division of the units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components may be combined or can be integrated into another system, or some features can be ignored, or not implemented. On the other hand, the coupling or direct coupling or communication connection between each other shown or discussed may be through some interfaces, and the indirect coupling or communication connection of the devices or units may be in electrical, mechanical or other forms.

The units described as separate components may or may not be physically separate, that is, they may be located in one place, or they may be distributed to multiple network units. Components shown as units may or may not be physical units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional unit in each embodiment of the present application can be integrated into one processing unit, or each unit can exist physically alone, or two or more units can be integrated into one unit.

In the above embodiments, it may be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented using a software program, it may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When computer program instructions are loaded and executed on a computer, the processes or functions described in the embodiments of the present application are generated in whole or in part. The computer may be a general-purpose computer, a special-purpose computer, a computing computer network, or other programmable device. The computer instructions may be stored in or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be transferred from a website, computer, server, or data center Transmission to another website, computer, server or data center through wired (such as coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (such as infrared, wireless, microwave, etc.) means. The computer-readable storage medium can be any available medium that can be accessed by a computer or include one or more data storage devices such as servers and data centers that can be integrated with the medium. The available media may be magnetic media (eg, floppy disk, hard disk, magnetic tape), optical media (eg, DVD), or semiconductor media (eg, solid state disk (SSD)), etc. In the embodiment of the present application, the computer may include the aforementioned device.

Although the present application has been described herein in connection with various embodiments, in practicing the claimed application, those skilled in the art will understand and understand by reviewing the drawings, the disclosure, and the appended claims. Other variations of the disclosed embodiments are implemented. In the claims, the word "comprising" does not exclude other components or steps, and "a" or "an" does not exclude a plurality. A single processor or other unit may perform several of the functions recited in the claims. The mere fact that certain measures are recited in mutually different dependent claims does not mean that a combination of these measures cannot be combined to advantageous effects.

Although the present application has been described in conjunction with specific features and embodiments thereof, it will be apparent that various modifications and combinations may be made without departing from the spirit and scope of the application. Accordingly, the specification and drawings are intended to be merely illustrative of the application as defined by the appended claims and are to be construed to cover any and all modifications, variations, combinations or equivalents within the scope of the application. Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. In this way, if these modifications and variations of the present application fall within the scope of the claims of the present application and equivalent technologies, the present application is also intended to include these modifications and variations.

Claims

A data sending method, characterized in that the method includes:

The first terminal device receives first information from the second terminal device, the first information indicates resources reserved by the second terminal device, the resources include first resources, and the first resources are used for the first terminal device receiving first data from the second terminal device;

Receive second information from a third terminal device, the second information is used to share a first channel occupancy time COT with the first terminal device, and the time-frequency resources in the first COT include second resources, and the The time domain positions of the second resource and the first resource overlap;

Send second data to the third terminal device on the second resource.
The method of claim 1, further comprising: not receiving the first data from the second terminal device on the first resource.
The method according to claim 1 or 2, characterized in that sending the second data to the third terminal device on the second resource includes:

When the first priority value is lower than or equal to the priority value corresponding to the first data, the second data is sent to the third terminal device on the second resource; wherein, the first priority The value is one of the following:

The priority value corresponding to the second data;

The priority value corresponding to the first COT;

The priority value of the network configuration; or,

Preconfigured priority value.
The method according to claim 3, characterized in that the second information is also used to indicate the priority value corresponding to the first COT.
The method according to claim 3 or 4, characterized in that the priority value corresponding to the first COT is the lowest priority value among the priority values corresponding to the data in the first COT, and the first The data in the COT includes the second data.
The method according to any one of claims 1-5, characterized in that the method further includes:

Send first resource reservation information on the second resource, where the first resource reservation information is used to indicate the priority of the first data to be sent by the first terminal device, and/or is used to carry the first data to be sent. A resource for data to be sent, where the first data to be sent and the second data belong to the same service.
A data sending method, characterized in that the method includes:

The first terminal device determines the second channel occupancy time COT, and the time-frequency resources in the second COT include third resources;

Receive third information from the second terminal device, the third information is used to share a third COT with the first terminal device, the time-frequency resources in the third COT include a fourth resource, and the third resource Overlaps with the time domain position of the fourth resource;

Use the first transmission power to send third data on the third resource; use a second transmission power to send fourth data on the fourth resource, and the second transmission power is greater than or equal to the first transmission power.
The method according to claim 7, characterized in that the method further comprises: determining the first transmission power and the second transmission power according to a first rule;

The first rule includes: when the resources used to send data include preempted resources and shared resources, the sending power corresponding to the shared resources is greater than or equal to the sending power corresponding to the preempted resources, and the sending power corresponding to the shared resources The sum of the transmit powers corresponding to the preempted resources is less than or equal to the maximum transmit power of the first terminal device.
The method according to claim 7 or 8, characterized in that the third information also includes power control information, The power control information is used to determine the second transmit power.
The method according to any one of claims 7-9, characterized in that the method further includes:

Receive fourth information from a third terminal device, the fourth information is used to share a fourth COT with the first terminal device, the time-frequency resources in the fourth COT include a fifth resource, and the fourth resource Overlaps with the time domain position of the fifth resource;

sending fifth data on the fifth resource using a third transmit power;

Wherein, the priority value corresponding to the fourth data is less than or equal to the priority value corresponding to the fifth data, the second transmission power is greater than or equal to the third transmission power, and the third transmission power is greater than Or equal to the first transmit power.
The method according to any one of claims 7-10, characterized in that the method further includes:

Send second resource reservation information on the third resource, where the second resource reservation information is used to indicate the priority of the second data to be sent by the first terminal device, and/or is used to carry the third Two resources for data to be sent, where the second data to be sent and the third data belong to the same service.
A communication device, characterized in that the communication device includes: a transceiver module;

The transceiver module is configured to receive first information from a second terminal device. The first information indicates resources reserved by the second terminal device. The resources include first resources. The first resource is used to receive first data from the second terminal device;

The transceiver module is also used to receive second information from a third terminal device. The second information is used to share the first channel occupancy time COT with the first terminal device where the communication device is located. The first COT The time-frequency resources within include a second resource, and the time domain positions of the second resource and the first resource overlap;

The transceiver module is also configured to send second data to the third terminal device on the second resource.
The communication device according to claim 12, characterized in that the communication device further includes: a processing module, the processing module is used to determine that all the data from the second terminal device is not received on the first resource. Describe the first data.
The communication device according to claim 12 or 13, wherein the transceiver module is further configured to send second data to the third terminal device on the second resource, including:

When the first priority value is lower than or equal to the priority value corresponding to the first data, the transceiver module is further configured to send the second data to the third terminal device on the second resource; Wherein, the first priority value is one of the following items:

The priority value corresponding to the second data;

The priority value corresponding to the first COT;

The priority value of the network configuration; or,

Preconfigured priority value.
The communication device according to claim 14, wherein the second information is also used to indicate the priority value corresponding to the first COT.
The communication device according to claim 14 or 15, wherein the priority value corresponding to the first COT is the lowest priority value among the priority values corresponding to the data in the first COT, and the priority value corresponding to the first COT is the lowest priority value among the priority values corresponding to the data in the first COT. The data within a COT includes the second data.
The communication device according to any one of claims 12-16, characterized in that:

The transceiver module is further configured to send first resource reservation information on the second resource, where the first resource reservation information is used to indicate the priority of the first data to be sent of the first terminal device where the communication device is located. level, and/or resources used to carry the first data to be sent, where the first data to be sent and the second data belong to the same service.
A communication device, characterized in that the communication device includes: a processing module and a transceiver module;

The processing module is used to determine the second channel occupancy time COT, and the time-frequency resources in the second COT include third resources;

The transceiver module is configured to receive third information from a second terminal device. The third information is used to share a third COT with the first terminal device where the communication device is located. The time and frequency in the third COT The resources include a fourth resource, and the time domain positions of the third resource and the fourth resource overlap;

The transceiver module is further configured to use the first transmit power to send third data on the third resource; the transceiver module is also used to use the second transmit power to send fourth data on the fourth resource, The second transmission power is greater than or equal to the first transmission power.
The communication device according to claim 18, wherein the processing module is further configured to determine the first transmission power and the second transmission power according to a first rule;

The first rule includes: when the resources used to send data include preempted resources and shared resources, the sending power corresponding to the shared resources is greater than or equal to the sending power corresponding to the preempted resources, and the sending power corresponding to the shared resources The sum of the transmit powers corresponding to the preempted resources is less than or equal to the maximum transmit power of the first terminal device where the communication device is located.
The communication device according to claim 18 or 19, wherein the third information further includes power control information, and the power control information is used to determine the second transmission power.
The communication device according to any one of claims 18-20, characterized in that:

The transceiver module is also configured to receive fourth information from a third terminal device. The fourth information is used to share a fourth COT with the first terminal device where the communication device is located. The time in the fourth COT is The frequency resource includes a fifth resource, and the time domain positions of the fourth resource and the fifth resource overlap;

The transceiver module is also configured to send fifth data on the fifth resource using a third transmission power;

Wherein, the priority value corresponding to the fourth data is less than or equal to the priority value corresponding to the fifth data, the second transmission power is greater than or equal to the third transmission power, and the third transmission power is greater than Or equal to the first transmit power.
The communication device according to any one of claims 18-21, characterized in that:

The transceiver module is further configured to send second resource reservation information on the third resource, where the second resource reservation information is used to indicate the priority of the second data to be sent of the first terminal device where the communication device is located. level, and/or resources used to carry the second data to be sent, where the second data to be sent and the third data belong to the same service.
A communication device, characterized in that the communication device includes a processor; the processor is used to run a computer program or instructions, so that the communication device executes the method according to any one of claims 1-6 , or, to cause the communication device to perform the method according to any one of claims 7-11.
A computer-readable storage medium, characterized in that the computer-readable storage medium stores computer instructions or programs. When the computer instructions or programs are run on the computer, the method according to any one of claims 1-6 is performed. Execute, or cause the method according to any one of claims 7-11 to be executed.
A computer program product, characterized in that the computer program product includes computer instructions; when part or all of the computer instructions are run on a computer, the method according to any one of claims 1-6 is executed, Or, the method according to any one of claims 7-11 is performed.