CN117997492A

CN117997492A - Sidestream communication method and device

Info

Publication number: CN117997492A
Application number: CN202211380062.0A
Authority: CN
Inventors: 黄海宁; 杨帆; 李君瑶; 张天虹
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2022-11-04
Filing date: 2022-11-04
Publication date: 2024-05-07
Also published as: WO2024093649A1

Abstract

The application provides a sidestream communication method and device, which are used for providing a scheme for transmitting PSFCH through a plurality of PRBs. The method comprises the following steps: the first terminal equipment receives X sidestream data and sends X PSFCH; wherein, the transmission of the first PSFCH in the X PSFCH occupies a first PRB set and a second PRB set corresponding to the first PSFCH; the first set of PRBs comprises N common PRBs, and the second set of PRBs comprises m PRBs; the first PSFCH has a transmit power on any PRB of the first set of PRBs that is less than or equal to a transmit power on any PRB of the second set of PRBs. By transmitting the first PSFCH on a common PRB, the SL communication of the first terminal device may meet the OCB requirement. By limiting the transmit power of the first PSFCH on the common PRB, the signal quality of the effective signal on the dedicated PRB may be improved.

Description

Sidestream communication method and device

Technical Field

The present application relates to the field of communications technologies, and in particular, to a sidestream communication method and device.

Background

In a side-link (SL) communication between a User Equipment (UE) and a UE, a transmitting UE may transmit data through a physical layer side-link shared channel (PHYSICAL SIDELINK SHARED CHANNEL, PSSCH), and after receiving the data, a receiving UE may feedback an Acknowledgement (ACK) or a negative acknowledgement (negative acknowledgement, NACK) corresponding to the data through a physical layer side-link feedback channel (PHYSICAL SIDELINK feedback channel, PSFCH). An ACK or NACK typically occupies 1 bit, so one PSFCH can occupy one physical resource block (physical resource block, PRB), i.e., an ACK or NACK can be transmitted.

In SL communication based on unlicensed spectrum, the UE needs to meet the requirement of occupying the channel bandwidth (occupied channel bandwidth, OCB) after preempting the channel, that is, the bandwidth requirement of occupying the channel during communication is greater than a certain threshold. To meet the OCB requirement, one PSFCH may be made to occupy multiple PRBs. However, when PSFCH occupies multiple PRBs, how the UE transmits each PSFCH is not currently implemented.

Disclosure of Invention

The application provides a sidestream communication method and a device, which are used for providing an implementation mode of transmitting PSFCH through a plurality of PRBs.

In a first aspect, a communication method is provided, where an execution subject of the method may be a terminal device or a chip, a chip system or a circuit located in the terminal device, and the method may be implemented by the following steps: the first terminal equipment receives X pieces of sidestream data and sends X PSFCH corresponding to the X pieces of sidestream data; wherein, the transmission of the first PSFCH in the X PSFCH occupies a first PRB set and a second PRB set corresponding to the first PSFCH; the first PRB set comprises N PRBs, the N PRBs are public PRBs, the second PRB set comprises m PRBs, N is an integer greater than 1, and m is an integer greater than or equal to 1; the transmission power of the first PSFCH on any PRB in the first PRB set is less than or equal to the transmission power on any PRB in the second PRB set, and X is an integer greater than or equal to 1.

In the application, the SL communication of the first terminal equipment can meet the OCB requirement by sending the first PSFCH on the public PRB. And, by limiting the transmission power of the first PSFCH on the common PRB, it is beneficial to ensure the signal quality of the effective signal (i.e., the first PSFCH transmitted on the dedicated PRB), so as to improve the transmission performance. By having higher transmit power on the dedicated PRBs and lower transmit power on the common PRBs, the probability of successful reception by the other party can be increased. Therefore, the transmission performance of PSFCH can be improved on the premise of meeting the OCB requirement through the mode.

In one possible design, the transmission power of the first PSFCH on any one PRB of the first PRB set and the second PRB set is obtained by equally dividing the transmission power of the first PSFCH according to the total number of PRBs included in the first PRB set and the second PRB set. I.e. the transmission power of each PRB in the common PRB set and the dedicated PRB set is the same. In this way, implementation complexity can be reduced.

In one possible design, the transmission power of the first PSFCH on any occupied PRB is the transmission power of the first PSFCH

In one possible design, the total transmit power on the first set of PRBs and the total transmit power on the second set of PRBs for the first PSFCH are determined based on the transmit power of the first PSFCH and the adjustment factor. In this way, the flexibility of transmission can be improved.

In one possible design, the first PSFCH may have total transmit power over the first set of PRBsThe following formula is satisfied:

The first PSFCH total transmit power over the second set of PRBs The following formula is satisfied:

Wherein P ¹ is the transmission power of the first PSFCH, α1 is the adjustment factor, and α1 is greater than 0 and less than 1.

Where P ¹ is the transmit power of the first PSFCH and β1 is the adjustment factor.

Where P ¹ is the transmit power of the first PSFCH and β2 is the adjustment factor.

In one possible design, the first set of PRBs includes all or part of the PRBs in one interleaved resource block.

In one possible design, a second PSFCH of the X PSFCH occupies a second set of PRBs corresponding to the first set of PRBs and the second PSFCH set. In the above design, the transmission modes of the X PSFCH are the same, that is, each PSFCH transmission occupies N common PRBs and a scheme of one dedicated PRB, so that the implementation complexity is low.

In one possible design, the transmission power of the first PSFCH is obtained by equally dividing the maximum transmission power of the first terminal device according to the value of X; or the transmission power of the first PSFCH is determined according to at least one of the priority of at least one PSFCH to be transmitted, the maximum transmission number of PSFCH, and the maximum transmission power of the first terminal device, where at least one PSFCH includes X PSFCH.

In one possible design, the transmission of the second PSFCH of the X PSFCH occupies a second set of PRBs corresponding to the second PSFCH.

In the above embodiment, the number of PSFCH transmitted on the common PRB may be reduced, so that the transmission power of the effective signal (i.e., PSFCH carried on the dedicated PRB) may be improved, and further, the signal quality of the effective signal (i.e., PSFCH transmitted on the dedicated PRB) may be improved, and the transmission performance may be improved. Therefore, the transmission performance of PSFCH can be further improved on the premise of meeting the OCB requirement through the mode.

In one possible design, the transmission power of the first PSFCH is determined according to the maximum transmission power of the first terminal device, the total number of PRBs occupied by X PSFCH, and the number of PRBs occupied by the first PSFCH.

In one possible design, the transmit power P ¹ of the first PSFCH satisfies the following formula:

Wherein P _{Total (S)} is the maximum transmit power of the first terminal device.

In one possible design, the first PSFCH is the lowest priority PSFCH of the X PSFCH.

In a second aspect, a communication method is provided, where the execution subject of the method may be a terminal device or a chip, a chip system or a circuit located in the terminal device, and the method may be implemented by the following steps: the second terminal device determines resources occupied by transmission of a first PSFCH, where the resources occupied by transmission of the first PSFCH include a first PRB set and a second PRB set corresponding to the first PSFCH. The second terminal device receives the first PSFCH on a second PRB set corresponding to the first PSFCH. The first PRB set comprises N PRBs, the N PRBs are public PRBs, the second PRB set comprises m PRBs, N is an integer greater than 1, and m is an integer greater than or equal to 1.

In one possible design, the second terminal device receives the first PSFCH on a second PRB set corresponding to the first PSFCH, including:

The second terminal device receives the first PSFCH on the second PRB set corresponding to the first PSFCH and does not receive the first PSFCH on the first PRB set.

In a third aspect, a communication method is provided, an execution subject of the method may be a terminal device or a chip, a chip system or a circuit located in the terminal device, and the method may be implemented by: the first terminal device receives the X sidestream data and sends Y PSFCH. Wherein, the transmission of the first PSFCH in Y PSFCH occupies a first PRB set, and the transmission of the second PSFCH in Y PSFCH occupies a second PRB set corresponding to the second PSFCH; the first PRB set comprises N PRBs, and the N PRBs are public PRBs; the second set of PRBs includes m PRBs; n is an integer greater than 1, and m is an integer greater than or equal to 1. X is an integer greater than or equal to 1; y is an integer greater than or equal to X.

In the application, through sending PSFCH on the public PRB, the SL communication of the first terminal device can meet the OCB requirement. In addition, the transmission of one PSFCH occupies N public PRBs, while the transmission of the other PSFCH occupies only dedicated PRBs, so that the number of PSFCH transmitted on the public PRBs can be reduced, and the transmission power of an effective signal (namely PSFCH borne on the dedicated PRB) can be improved, and further the signal quality of the effective signal (namely PSFCH transmitted on the dedicated PRB) can be improved, and the transmission performance can be improved. Therefore, the transmission performance of PSFCH can be further improved on the premise of meeting the OCB requirement through the mode.

In one possible design, Y PSFCH are X PSFCH corresponding to X sidestream data, and the first PSFCH is PSFCH with the lowest priority from X PSFCH. By sending PSFCH with the lowest priority on the public PRB, the design can ensure the signal quality of PSFCH with high priority, thereby improving the transmission performance. Therefore, the transmission performance of PSFCH can be improved on the premise of meeting the OCB requirement through the mode.

In one possible design, y=x+1, Y PSFCH include X PSFCH corresponding to X side row data and one preconfigured or predefined PSFCH, the first PSFCH being preconfigured or predefined PSFCH. By sending the preconfigured PSFCH on the public PRB, the design can ensure the signal quality of PSFCH carrying effective information, thereby improving the transmission performance. Therefore, the transmission performance of PSFCH can be improved on the premise of meeting the OCB requirement through the mode.

In one possible design, the transmission power of the first PSFCH on any PRB in the first PRB set is obtained by dividing the transmission power of the first PSFCH equally according to the total number of PRBs included in the first PRB set. The implementation complexity can be reduced by this design.

In one possible design, the transmission power of the second PSFCH on any PRB in the second PRB set is obtained by dividing the transmission power of the second PSFCH equally according to the total number of PRBs included in the second PRB set. The implementation complexity can be reduced by this design.

In one possible design, the first set of PRBs includes all or part of the PRBs in one or more interleaved resource blocks.

In a fourth aspect, a communication method is provided, an execution subject of the method may be a terminal device or a chip, a chip system or a circuit located in the terminal device, and the method may be implemented by: the second terminal device determines resources occupied by transmission of a first PSFCH, where the resources occupied by transmission of the first PSFCH are a first PRB set. The second terminal device receives the first PSFCH on the first PRB set. The first PRB set comprises N PRBs, and the N PRBs are public PRBs; n is an integer greater than 1.

In a fifth aspect, a communication method is provided, an execution subject of the method may be a terminal device or a chip, a chip system or a circuit located in the terminal device, and the method may be implemented by: the first terminal equipment successfully accesses a channel before a first initial symbol or a first initial symbol in a first time slot; the first terminal equipment starts to transmit sidestream data at the first starting symbol, wherein the sidestream data is borne on a PSSCH; wherein the first time slot includes the first start symbol and a second start symbol, and the second start symbol is a symbol after the first start symbol; the first start symbol and the second start symbol are automatic gain control (automatic gain control, AGC) symbols. The first start symbol is a copy of a next symbol to the first start symbol and the second start symbol is a copy of a first symbol to the second start symbol.

In one possible design, the first starting symbol is a first symbol in the first slot.

In one possible design, the second starting symbol may be a sixth symbol in the first slot.

When the number of symbols occupied by the PSCCH and the corresponding PSCCH in one slot is 13, the PSSCH DMRS time domain position does not include the sixth symbol, so that the symbol used as the DMRS symbol included in the slot is not affected by AGC, and thus demodulation performance of the receiving terminal device can be ensured.

In one possible design, the second starting symbol is a first symbol in a first slot and a first symbol after the first symbol that does not include a PSSCH demodulation reference signal (demodulation REFERENCE SIGNAL, DMRS). Wherein the first symbol is the next symbol of the symbols occupied by the PSCCH in the first slot or the fifth symbol.

In one possible design, the resource pool corresponding to the first terminal device includes one resource block set, where the resource pool is a resource set for the first terminal device to perform side communication.

In one possible design, the method further comprises: the first terminal device sends reference signal indication information, wherein the reference signal indication information indicates the time domain position of the DMRS symbol of the PSSCH, and the time domain position of the DMRS symbol does not comprise the position of the second initial symbol.

In a sixth aspect, an embodiment of the present application provides a communications apparatus, where the method implemented by the first terminal device in the first aspect or any possible design thereof, or in the third aspect or any possible design thereof, or in the fifth aspect or any possible design thereof, may be implemented. The apparatus comprises corresponding units or means for performing the above-described methods. The units comprised by the device may be implemented in software and/or hardware. The apparatus may be, for example, the first terminal device, or a component or baseband chip, a system-on-chip, or a processor, etc. that may support implementation of the above method in the first terminal device.

Illustratively, the communications apparatus includes a processor configured to support the communications apparatus to perform the corresponding functions of the terminal device in the methods shown above. The communication device may also include a memory, which may be coupled to the processor, that holds the program instructions and data necessary for the communication device. Optionally, the communication device further comprises an interface circuit for supporting communication between the communication device and other terminal equipment.

By way of example, the communication device may comprise modular components such as a transceiver unit (or communication module, transceiver module) and a processing unit (or processing module), which may perform the respective functions of the first terminal device in the first aspect or any of its possible designs, or in the third aspect or any of its possible designs, or in the fifth aspect or any of its possible designs. When the communication apparatus is a first terminal device, the transceiver unit may be a transmitter and a receiver, or a transceiver obtained by integrating the transmitter and the receiver. The transceiver unit may include an antenna, a radio frequency circuit, etc., and the processing unit may be a processor, such as a baseband chip, etc. When the communication device is a component having the function of the first terminal device, the transceiver unit may be a radio frequency unit, and the processing unit may be a processor. When the communication device is a chip system, the transceiver unit may be an input/output interface of the chip system, and the processing unit may be a processor of the chip system, for example: a central processing unit (central processing unit, CPU).

The transceiver unit may be configured to perform the actions of receiving and/or transmitting performed by the first terminal device in the first aspect or any of its possible designs, or in the third aspect or any of its possible designs, or in the fifth aspect or any of its possible designs. The processing unit may be operative to perform actions other than the receiving and transmitting performed by the first terminal device in the first aspect or any of its possible designs, or in the third aspect or any of its possible designs, or in the fifth aspect or any of its possible designs.

In a seventh aspect, an embodiment of the present application provides a communication apparatus, which may implement the method implemented by the second terminal device in the second aspect or any possible design thereof, or in the fourth aspect or any possible design thereof. The apparatus comprises corresponding units or means for performing the above-described methods. The units comprised by the device may be implemented in software and/or hardware. The apparatus may be, for example, the second terminal device, or a component or baseband chip, a system-on-chip, or a processor, etc. that may support implementation of the above method in the second terminal device.

The communication device may comprise modular components, such as a transceiver unit (or communication module, transceiver module) and a processing unit (or processing module), which may perform the corresponding functions of the second terminal device in the second aspect or any of the possible designs thereof, or in the fourth aspect or any of the possible designs thereof. When the communication apparatus is a second terminal device, the transceiver unit may be a transmitter and a receiver, or a transceiver obtained by integrating the transmitter and the receiver. The transceiver unit may include an antenna, a radio frequency circuit, etc., and the processing unit may be a processor, such as a baseband chip, etc. When the communication device is a component having the function of the second terminal device, the transceiver unit may be a radio frequency unit, and the processing unit may be a processor. When the communication device is a chip system, the transceiver unit may be an input/output interface of the chip system, and the processing unit may be a processor of the chip system, for example: a central processing unit (central processing unit, CPU).

The transceiver unit may be configured to perform the actions of receiving and/or transmitting performed by the second terminal device in the second aspect or any of its possible designs, or in the fourth aspect or any of its possible designs. The processing unit may be operative to perform actions other than the receiving and transmitting performed by the first terminal device in the second aspect or any of its possible designs, or in the fourth aspect or any of its possible designs.

In an eighth aspect, a communication system is provided, which comprises the apparatus according to the sixth aspect and the apparatus according to the seventh aspect.

In a ninth aspect, there is provided a computer readable storage medium for storing computer instructions which, when run on a computer, cause the computer to perform the method as shown in any one of the above first to fifth aspects or any one of its possible implementation manners.

In a tenth aspect, there is provided a computer program product comprising instructions for storing computer instructions which, when run on a computer, cause the computer to perform the method as shown in any one of the above first to fifth aspects or any one of its possible implementations.

In an eleventh aspect, there is provided a circuit coupled to a memory, the circuit being adapted to perform the method as shown in any one of the above first to fifth aspects or any one of its possible implementation manners. The circuitry may include chip circuitry.

Drawings

FIG. 1 is a schematic diagram of a V2X system according to an embodiment of the present application;

FIG. 2 is a schematic flow chart of a sidestream communication method according to an embodiment of the present application;

fig. 3A is a schematic diagram of a common PRB according to an embodiment of the present application;

FIG. 3B is a schematic diagram of a common resource according to an embodiment of the present application;

FIG. 3C is a schematic diagram of a common resource according to an embodiment of the present application;

fig. 4 is a schematic diagram of a common PRB according to an embodiment of the present application;

FIG. 5 is a schematic diagram of a transmission X PSFCH according to one embodiment of the present application;

FIG. 6 is a schematic diagram of a transmission X PSFCH according to one embodiment of the present application;

FIG. 7 is a schematic diagram of a method of sidestream communication according to an embodiment of the present application;

FIG. 8 is a schematic diagram of a transmission X PSFCH according to one embodiment of the present application;

FIG. 9 is a schematic diagram of a transmission X PSFCH according to one embodiment of the present application;

Fig. 10 is a schematic structural diagram of a communication device according to an embodiment of the present application;

fig. 11 is a schematic structural diagram of a communication device according to an embodiment of the present application.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application more apparent, the embodiments of the present application will be described in further detail with reference to the accompanying drawings.

In the following, some terms in the embodiments of the present application are explained for easy understanding by those skilled in the art.

1) Terminal devices, including devices that provide voice and/or data connectivity to a user, specifically, devices that provide voice to a user, or devices that provide data connectivity to a user, or devices that provide voice and data connectivity to a user. For example, may include a handheld device having wireless connectivity, or a processing device connected to a wireless modem. The terminal device may communicate with the core network via a radio access network (radio access network, RAN), exchange voice or data with the RAN, or interact voice and data with the RAN. The terminal devices may include user devices, wireless terminal devices, mobile terminal devices, device-to-device (D2D) terminal devices, vehicle-to-all (vehicle to everything, V2X) terminal devices, machine-to-machine/machine-type communication (M2M/MTC) terminal devices, internet of things (internet of things, ioT) terminal devices, subscriber units (subscriber units), subscriber stations (subscriber station), mobile stations (mobile stations), remote Stations (APs), remote terminals (ACCESS TERMINAL), user terminals (user terminals), user agents (user agents), or user equipment (user devices), and the like. For example, mobile telephones (or "cellular" telephones) computers with mobile terminal devices, portable, pocket, hand-held, computer-built mobile devices, and the like may be included. Such as personal communication services (personal communication service, PCS) phones, cordless phones, session initiation protocol (session initiation protocol, SIP) phones, wireless local loop (wireless local loop, WLL) stations, personal Digital Assistants (PDAs), and the like. But also limited devices such as devices with lower power consumption, or devices with limited memory capabilities, or devices with limited computing capabilities, etc. Examples include bar codes, radio frequency identification (radio frequency identification, RFID), sensors, global positioning systems (global positioning system, GPS), laser scanners, and other information sensing devices.

The terminal device in the V2X technology may be a Road Side Unit (RSU), which may be a fixed infrastructure entity supporting the V2X application, and may exchange messages with other entities supporting the V2X application, for example, the road side unit may exchange messages with other entities supporting the V2X application through a PC5 port.

The terminal device in the V2X technology may also be a whole vehicle, a communication module (such as a communication chip, a chip system, etc.) in the whole vehicle, and so on.

For example, the terminal device may be a mobile phone (mobile phone), a tablet computer (Pad), a computer with a wireless transceiver function, a wearable device, a wireless terminal in industrial control, a wireless terminal in unmanned driving, a smart speaker in IoT network, a wireless terminal device in telemedicine, a wireless terminal device in smart grid, a wireless terminal device in transportation security, a wireless terminal device in smart city, or a wireless terminal device in smart home, etc., which the embodiments of the present application are not limited to. The wearable device can also be called as a wearable intelligent device or an intelligent wearable device, and is a generic name for intelligently designing daily wear and developing wearable devices, such as glasses, gloves, watches, clothes, shoes, and the like, by applying wearable technology. By way of example, the wearable device may be a Virtual Reality (VR) device, an augmented reality (augmented reality AR) device. The wearable device is a portable device that is worn directly on the body or integrated into the clothing or accessories of the user. The wearable device is not only a hardware device, but also can realize a powerful function through software support, data interaction and cloud interaction. The generalized wearable intelligent device includes full functionality, large size, and may not rely on the smart phone to implement complete or partial functionality, such as: smart watches or smart glasses, etc., and focus on only certain types of application functions, and need to be used in combination with other devices, such as smart phones, for example, various smart bracelets, smart helmets, smart jewelry, etc. for physical sign monitoring.

The terminal equipment can also be a whole vehicle, a wireless communication module in the whole vehicle, a vehicle-mounted T-box (Telematics BOX) and a road side unit RSU.

The terminal device may also be a V2X device, such as a smart car (smart car or INTELLIGENT CAR), a digital car (DIGITAL CAR), an unmanned car (unmanned car or DRIVERLESS CAR or pilotless car or automobile), an automatic car (self-DRIVING CAR or auto car), a pure EV or Battery EV, a hybrid ELECTRIC VEHICLE, an HEV, a range extended EV, a plug-in HEV, a new energy car (NEW ENERGY VEHICLE), a roadside device (RSU). The terminal device may also be a device in a device-to-device (D2D) communication, e.g. an electricity meter, a water meter, etc.

In addition, in the embodiment of the application, the terminal equipment can also be terminal equipment in an IoT system, and the IoT is an important component of the development of future information technology, and the main technical characteristics of the terminal equipment are that the articles are connected with a network through a communication technology, so that the man-machine interconnection and the intelligent network for the interconnection of the articles are realized.

While the various terminal devices described above, if located on a vehicle (e.g., placed in a vehicle or mounted in a vehicle), may be considered as in-vehicle terminal devices, for example, also referred to as in-vehicle units (OBUs). The terminal device of the present application may also be an in-vehicle module, an in-vehicle part, an in-vehicle chip, or an in-vehicle unit built in a vehicle as one or more parts or units, and the vehicle may implement the method of the present application by the in-vehicle module, the in-vehicle part, the in-vehicle chip, or the in-vehicle unit built in.

In the embodiment of the application, the terminal equipment can also comprise a relay. Or it is understood that all that is capable of data communication with a base station can be seen as a terminal device.

In the embodiment of the present application, the device for implementing the function of the terminal device may be the terminal device, or may be a device that is applied to the terminal device and is capable of supporting the terminal device to implement the function, for example, a component or an assembly having a communication function, or a chip system, and the device may be installed in the terminal device. In the embodiment of the application, the chip system can be composed of chips, and can also comprise chips and other discrete devices. In the technical solution provided in the embodiment of the present application, the device for implementing the function of the terminal is a terminal device, which is described in the technical solution provided in the embodiment of the present application.

2) A network device, for example comprising AN Access Network (AN) device, such as a base station (e.g. AN access point), may refer to a device in the access network that communicates over the air with a wireless terminal device via one or more cells, or a network device in a V2X technology is a base station RSU, for example. The base station may be configured to convert the received air frames to and from internet protocol (internet protocol, IP) packets as a router between the terminal device and the rest of the access network, which may include an IP network. The base station-type RSU may be a fixed infrastructure entity supporting V2X applications, which may exchange messages with other entities supporting V2X applications, e.g. the base station-type road side unit may exchange messages with other entities supporting V2X applications via the Uu port. The network device may also coordinate attribute management for the air interface. For example, the network device may include an evolved base station (NodeB or eNB or e-NodeB, evolutional Node B) in an LTE system or long term evolution advanced (long term evolution-a), or may also include a next generation NodeB (next generation node B, gNB) in a fifth generation mobile communication technology (the 5th generation,5G) NR system (also simply referred to as an NR system), or may also include a centralized unit (centralized unit, CU) and a Distributed Unit (DU) in a Cloud access network (Cloud radio access network, cloud RAN) system, and embodiments of the present application are not limited. For example, the network device may be a CU in a cloudran system, or a DU, or an ensemble of a CU and a DU.

The network devices may also include core network devices including, for example, access and mobility management functions (ACCESS AND mobility management function, AMF), etc. The embodiment of the application mainly relates to an access network, so that the network devices refer to access network devices unless otherwise specified hereinafter.

In the embodiment of the present application, the means for implementing the function of the network device may be the network device, or may be a means capable of supporting the network device to implement the function, for example, a chip system, and the apparatus may be installed in the network device. In the technical solution provided in the embodiment of the present application, the device for implementing the function of the network device is exemplified by the network device, and the technical solution provided in the embodiment of the present application is described.

3) The interleaved resource block (interlace) may include or consist of a plurality of equally spaced Resource Blocks (RBs). An interlace of a plurality of resource blocks is defined in NR, taking an interlace value of M and the number of interlace resource blocks of M as an example, one resource block group (or referred to as a group of interlace resource blocks) may include resource blocks with indices { M, m+m, 2m+m, 3m+m }, where M e {0,1, }, M-1}. M is an integer greater than 0. Alternatively, the number of PRBs included in different interleaved resource blocks may differ by at most 1 PRB, i.e. the number of PRBs included in any two interleaved resource blocks may differ by 0 PRB or 1 PRB. For the first mod (H, M) interleaved resource blocks of the M interleaved resource blocks,For the remaining interleaved resource blocks,Where H is the number of all PRBs.

4) Licensed and unlicensed bands: licensed bands are typically available to some organizations or operators, while unlicensed bands are shared bands and may be used by different operators/organizations. The licensed bands may be referred to as licensed spectrum, licensed spectrum resources, etc., and the unlicensed bands may be referred to as unlicensed spectrum, unlicensed spectrum resources, etc.

5) Channel occupancy time (channel occupancy time, COT): after successful listen-before-talk (listen before talk, LBT), the transmitting end does not permanently occupy the channel, but rather determines an occupancy duration, which may be referred to as COT. Within the COT, the device needs to meet the requirement of occupying the channel bandwidth (occupied channel bandwidth, OCB) when transmitting signals, that is, the bandwidth of occupying the channel when communicating needs to be greater than a certain threshold.

6) Side link (sidelink) communication: the sidelink communication refers to a communication mode of directly communicating between two peer user nodes, for example, the sidelink communication can be performed between terminals.

In sidelink communication, a transmitting end can transmit data to a receiving end through a sidelink physical shared channel (PHYSICAL SIDELINK SHARED CHANNEL, PSSCH). After receiving the data, the receiving end may feed back hybrid automatic repeat request (hybrid automatic repeat request, HARQ) information of the data to the transmitting end. Currently, HARQ feedback dedicated channels, i.e., sidelink physical feedback channels (PHYSICAL SIDELINK feedback channels, PSFCH), are defined in sidelink communications.

7) Common PRB: for transmission by a plurality of terminal devices. A common PRB is a PRB commonly used by each terminal device, and may be understood as a commonly used PRB. Alternatively, it is also understood that the frequency domain code domain resources are commonly used. It should be noted that a common PRB supports transmission by a plurality of terminal devices, but at one time, there may be transmission by one terminal device or transmission by a plurality of terminal devices on a common PRB. The OCB requirement can be met by transmitting on common PRBs.

8) Dedicated PRBs: for a terminal device to transmit. For one dedicated PRB, only one terminal device can transmit at a time. Alternatively, the PRB after the common PRB is removed from all the PRBs included in one PSFCH occasion (PSFCH occasion) may be used as the dedicated PRB. Alternatively, the resources after the common resource is removed from all PSFCH resources included in one PSFCH occasion may be dedicated PSFCH resources.

In the embodiments of the present application, "at least one" means one or more, and "a plurality" means two or more. "and/or", describes an association relationship of an association object, and indicates that there may be three relationships, for example, a and/or B, and may indicate: a alone, a and B together, and B alone, wherein a, B may be singular or plural. The character "/" generally indicates that the context-dependent object is an "or" relationship. "at least one of" or the like means any combination of these items, including any combination of single item(s) or plural items(s). For example, at least one (one) of a, b, or c may represent: a, b, c, a and b, a and c, b and c, or a and b and c, wherein a, b, c may be single or plural.

And, unless otherwise indicated, the terms "first," "second," and the like according to the embodiments of the present application are used for distinguishing a plurality of objects, and are not used for limiting the size, content, order, timing, priority, importance, or the like of the plurality of objects. For example, the first set of physical resource blocks (physical resource block, PRBs) and the second set of PRBs are merely for distinguishing between different sets of PRBs, and are not indicative of the difference in priority, number of PRBs, or importance of the two sets of PRBs.

In the present application, the words "exemplary" or "such as" are used to mean serving as an example, instance, or illustration. Any embodiment or design described herein as "exemplary" or "for example" should not 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 fashion.

The terms "comprising" and "having" and any variations thereof, as used in the following description of embodiments of the application, are intended to cover a non-exclusive inclusion. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those listed but may optionally include other steps or elements not listed or inherent to such process, method, article, or apparatus.

The foregoing describes some of the terms involved in the embodiments of the present application, and the architecture of the network system to which the method provided by the present application is applied is described below.

The communication method provided by the application can be applied to a 5G New Radio (NR) Unlicensed (Unlocked) system or other communication systems, for example, an Internet of things (internet of things, ioT) system, a vehicle-to-everything (V2X) system, a narrowband Internet of things (narrow band internet of things, NB-IoT) system, a long term evolution (long term evolution, LTE) system, a fifth generation (5G) communication system, a LTE and 5G mixed architecture, a 5G New Radio (NR) system, a new communication system in future communication development and the like.

Taking a V2X system as an example, the embodiment of the present application may be applied to the architecture shown in fig. 1. The V2X system may include several application requirements, such as vehicle-to-vehicle (V2V), vehicle-to-infrastructure (V2I), direct communication of vehicles with pedestrians (V2P), and communication interactions of vehicles with a network (V2N). V2V refers to communication between vehicles; V2P refers to vehicle-to-person (including pedestrians, cyclists, drivers, or passengers) communication; V2I refers to the communication of the vehicle with a network device, such as an RSU, and another V2N may be included in the V2I, V2N refers to the communication of the vehicle with a base station/network.

The network architecture and the service scenario described in the embodiments of the present application are for more clearly describing the technical solution provided in the embodiments of the present application, and do not constitute a limitation on the technical solution provided in the embodiments of the present application, and those skilled in the art can know that, with the evolution of the network architecture and the appearance of a new service scenario, the technical solution provided in the embodiments of the present application is applicable to similar technical problems.

The technical features related to the embodiments of the present application are described below.

In SL communication, the transmitting terminal device may transmit data through the PSSCH, and the receiving terminal device may feed back HARQ information corresponding to the data through PSFCH after receiving the data. HARQ information typically occupies 1 bit, so one PSFCH can occupy one physical resource block (physical resource block, PRB), i.e., can transmit HARQ information. In SL communication based on unlicensed spectrum, the UE needs to meet the OCB requirement after preempting the channel, that is, the bandwidth of the occupied channel during communication needs to be greater than a certain threshold. To meet the OCB requirement, one PSFCH may be made to occupy multiple PRBs. When one PSFCH occupies 1 PRB, the terminal device transmits a plurality of PSFCH, the maximum transmission power of the terminal device is equally divided into the plurality of PSFCH to allocate transmission power according to the number of PSFCH. Or the terminal device determines the number and power of the transmissions PSFCH according to the determined transmission power based on the downlink loss, the maximum transmission power, the number of transmissions PSFCH, the upper limit of the number of transmittable PSFCH. However, when PSFCH occupies multiple PRBs, how the UE transmits each PSFCH is not currently implemented.

Based on this, the embodiment of the application provides a sidestream communication method and device, which are used for providing an implementation scheme for transmitting PSFCH through a plurality of PRBs. The method and the device are based on the same inventive concept, and because the principles of solving the problems by the method and the device are similar, the implementation of the device and the method can be referred to each other, and the repetition is not repeated.

For one terminal device, it is possible to receive side line data transmitted by other terminal devices, and hereinafter, a terminal device transmitting data is referred to as a transmitting side terminal device, and a terminal device receiving data is referred to as a receiving side terminal device. It should be understood that the transmitting side terminal device and the receiving side terminal device are relatively, and the transmitting side terminal device may have a receiving function, and the receiving side terminal device may have a transmitting function.

In the present application, the term "the transmission of information occupies the first resource" is understood as transmitting the information on the first resource, or the resource used for transmitting the information is the first resource. For example, the transmission of the first PSFCH occupies a first PRB set and a second PRB set corresponding to the first PSFCH, and it may be understood that the first terminal device transmits the first PSFCH on the first PRB set and the second PRB set corresponding to the first PSFCH. Alternatively, it may be understood that PSFCH resources used for transmitting the first PSFCH are: the first set of PRBs and a second set of PRBs corresponding to the first PSFCH.

The technical scheme provided by the embodiment of the application is described below with reference to the scene shown in fig. 1. Referring to fig. 2, a schematic flow chart of a sidestream communication method is provided in the present application. The method comprises the following steps:

s201, the first terminal device receives X sidestream data.

Wherein X is an integer greater than or equal to 1.

The X sidestream data may be from one terminal device or from a plurality of terminal devices, which is not particularly limited herein. Illustratively, a first terminal device receives X sidestream data from X terminal devices. I.e. the first terminal device receives one sidestream data from each of the X terminal devices. Or the first terminal device receives X sidestream data from Z terminal devices. Wherein Z is a number greater than or equal to 1 and less than or equal to X. I.e. the first terminal device receives a plurality of sidestream data from the same terminal device.

Taking X equal to 1 as an example, the first terminal device may receive sidestream data from the second terminal device. I.e. the first terminal device receives a sidestream data from the second terminal device.

Taking X equal to 5 as an example, the first terminal device receives 5 sidestream data from 5 terminal devices. I.e. the first terminal device receives one sidestream data from 5 terminal devices, respectively. Or the first terminal device receives 5 sidestream data from 3 terminal devices. The first terminal device receives 1 sidestream data from the terminal device A, 3 sidestream data from the terminal device B and 1 sidestream data from the terminal device C.

The sidestream data is data transmitted between terminal devices. In one example, the sidestream data may be sidestream transport blocks (transmission block, TB).

In a possible implementation manner, the first terminal device may receive a plurality of sidestream data, where the plurality of sidestream data includes the X sidestream data. I.e. the number of sidestream data received by the first terminal device may be greater than or equal to X.

Further, the first terminal device may determine at least one PSFCH to be sent according to the plurality of sidestream data, and determine X PSFCH corresponding to the X sidestream data at the at least one PSFCH to be sent. Wherein the at least one PSFCH may include PSFCH carrying HARQ information and/or PSFCH carrying collision information. The HARQ information indicates whether the first terminal device successfully decodes the side line data, if so, the HARQ information is an Acknowledgement (ACK), and the first terminal device does not successfully decode the side line data, and the HARQ information is a negative acknowledgement (negative acknowledgment, NACK). The collision information indicates that the first terminal device detects edge link control information (sidelink control information, SCI) of other terminal devices, and that reserved resources indicated by the SCI collide. Here, one PSFCH carries one HARQ information or one PSFCH carries one collision information.

For PSFCH carrying HARQ information, the sidestream data received by the first terminal device may be from broadcast data, multicast data or unicast data. The manner in which the first terminal device determines whether to transmit PSFCH carrying HARQ information is described below in connection with the transmission of sidestream data.

If the sidestream data is unicast and the corresponding HARQ is enabled, the first terminal device determines PSFCH for transmitting the bearing HARQ information;

If the sidestream data is multicast and the multicast feedback mode is an ACK or NACK feedback mode and the corresponding HARQ is enabled, the first terminal equipment determines PSFCH for transmitting the HARQ information;

If the sidestream data is multicast, the feedback mode of the multicast is the feedback mode of NACK only, the corresponding HARQ is enabled, and the result of decoding the sidestream data by the first terminal equipment is NACK, the first terminal equipment determines PSFCH for transmitting the HARQ information.

For PSFCH carrying collision information, the first terminal device detects the SCI of the scheduling data, where the reserved resource indicated by the SCI collides, i.e. the reserved resource indicated by the SCI collides with the reserved resource indicated by another SCI, or the time slot in which the reserved resource indicated by the SCI is located is the time slot in which the first terminal device does not expect to receive data.

It should be appreciated that the X PSFCH above may include PSFCH carrying HARQ information and/or PSFCH carrying collision information. For example, X PSFCH include a pieces of HARQ information corresponding to the a sidestream data, and X-a pieces of PSFCH carrying collision information. If X PSFCH include PSFCH carrying collision information, S201 may be understood as or replaced with "the first terminal device receives X 'sidestream data, where X' is less than or equal to X.

In one embodiment, a may be equal to 0, i.e., X PSFCH are PSFCH that each carry collision information. The above S201 may not be executed.

Alternatively, the first terminal device may determine to transmit X PSFCH in at least one PSFCH to be transmitted through scheme 1 or scheme 2 as follows.

In case of scheme 1, in which the higher layer parameters dl-P0-PSFCH are provided, if the number N _sch,Tx,PSFCH of the at least one PSFCH to be transmitted is less than or equal to the maximum number N _max,PSFCH of transmissions of PSFCH supported by the first terminal device, X number PSFCH may be determined as in example a or example B below.

Example a: if P _PSFCH,one+10log₁₀N_sch,Tx,PSFCH≤P_{Total (S)}, the above X PSFCH is equal to the number of the at least one PSFCH to be transmitted, that is, the above X PSFCH is the at least one PSFCH to be transmitted.

Wherein, P _PSFCH,one＝P_O,PSFCH+10log₁₀2^μ+α_PSFCH. PL, wherein, P _O,PSFCH is the value of the high-level parameter dl-P0-PSFCH; alpha _PSFCH is the value of the higher layer parameter dl-Alpha-PSFCH, and if the value of the higher layer parameter dl-Alpha-PSFCH is not configured, alpha _PSFCH＝1;α_PSFCH and P _O,PSFCH are adjustment parameters for adjusting the transmission power based on the downlink loss. PL is a path loss value measured from a reference signal resource. The reference signal (REFERENCE SIGNAL, RS) resource may be an RS resource used by the first terminal device to determine power of a Physical Uplink Shared Channel (PUSCH) transmission scheduled by a downlink control information (downlink control information, DCI) format 0-0, or may be an RS resource corresponding to a synchronization signal/physical broadcast channel block (SYNC SIGNAL/physical broadcast channel, SSB) used to acquire a master information block (master indication block, MIB).

Example B, if P _PSFCH,one+10log₁₀ N_sch,Tx,PSFCH>P_{Total (S)}, the first terminal determines X PSFCH in the at least one PSFCH to be transmitted, where X < N _sch,Tx,PSFCH, X is ≡max (1,) Where, if 1+.i+.k, M _i represents the number of HARQ messages carried PSFCH with priority i in at least one PSFCH to be sent. If k.ltoreq.i.ltoreq.K, M _i represents the number of bearer collision information PSFCH with priority value i-K in at least one PSFCH to be transmitted. K is greater than or equal to 1 and less than or equal to K, K representing the maximum priority value of PSFCH carrying HARQ information. For example, if k=8, if 1+.i+.8, m _i represents the number of HARQ information bearing PSFCH with priority value i in at least one PSFCH to be transmitted. If i is 8 or less and K is or less, M _i represents the number of pieces of collision information carrying PSFCH with a priority value of i-8 in at least one PSFCH to be transmitted. K is the satisfaction Is a maximum value of (a). If no K can be taken as the value of K is equal to 0. Wherein a higher priority value indicates a lower priority.

If the number N _sch,Tx,PSFCH of the at least one PSFCH to be transmitted is greater than the maximum number N _max,PSFCH of transmissions of PSFCH supported by the first terminal device, X PSFCH may be determined by example C or example D.

Example C, if P _PSFCH,one+10log₁₀N_max,PSFCH≤P_{Total (S)}, the above X PSFCH are equal to N _max,PSFCH, i.e. the first terminal device determines N _max,PSFCH PSFCH in the at least one PSFCH to be transmitted. Specifically, for PSFCH carrying HARQ information in at least one PSFCH to be sent, the first terminal device may sort in ascending order of priority values, and determine W PSFCH. If the number of PSFCH carrying HARQ information is greater than or equal to X, W may be equal to X, and the determined W PSFCH are the X PSFCH. If the number W of PSFCH carrying HARQ information is less than X, the PSFCH carrying collision information in at least one PSFCH to be sent may be sorted according to ascending priority values, and X-W PSFCH are determined, where the X PSFCH includes the W PSFCH and the X-W PSFCH.

Example D, if P _PSFCH,one+10log₁₀N_max,PSFCH>P_{Total (S)}, the first terminal device determines X PSFCH, X < N _max,PSFCH, in the at least one PSFCH to be transmitted. The manner in which X PSFCH are determined in the at least one PSFCH to be transmitted is similar to the manner in which X PSFCH are determined in the at least one PSFCH to be transmitted in example B, and will not be explained here.

Scheme 2: if the higher layer parameters dl-P0-PSFCH are not provided, the first terminal device selects X PSFCH in the at least one PSFCH to be transmitted according to an ascending order of the priority value of PSFCH carrying HARQ information, and then according to an ascending order of the priority value of PSFCH carrying collision information.

S202, the first terminal device sends X PSFCH corresponding to the X sidestream data.

Optionally, in the present application, X PSFCH may occupy the first PRB set and X second PRB sets. That is, the X PSFCH frequency domain resources are a first PRB set and X second PRB sets. The first set of PRBs includes N PRBs, where N PRBs are common PRBs and N is an integer greater than 1. Optionally, the N PRBs are used (or support) for transmission by multiple terminal devices, but only one terminal device may transmit on the N PRBs during actual transmission. The common PRBs used by different terminal devices are the same PRBs. Illustratively, a common PRB is a PRB that can be used by any terminal device. Or a common PRB may be understood as the same PRB used by different terminal devices in the same PSFCH time domain resource. Or a common PRB may be understood as any PRB used by the terminal device transmitting PSFCH in this PSFCH time domain resource. I.e. the common PRB is a PRB that any one of the terminal devices in the system is entitled to use. Or the common PRB is a PRB that can be used by any terminal device in the system. Illustratively, the first terminal device, the second terminal device, and the third terminal device each transmit PSFCH on the PSFCH time domain resources, and the resources used by the three terminal devices to transmit PSFCH each include the common PRB.

Alternatively, the first PRB set may comprise all or part of PRBs in one interleaved resource block.

Or the first set of PRBs may be part of all PRBs included in PSFCH symbols. For example, the first PRB set may be two PRBs with the largest and smallest frequency domain indexes among all PRBs included in PSFCH symbols. Or, for example, the first set of PRBs may be PRBs at the edge of the bandwidth among all PRBs included in PSFCH symbols.

Alternatively, the common code domain resource corresponding to the N common PRBs in the present application may be one cyclic shift (CYCLIC SHIFT, CS) value or one CS pair, or all CS pairs configured in the resource pool.

For ease of understanding, the first PRB set may be replaced by a first resource set, where the first resource set includes N common resources, and in particular may be N sets of frequency domain code domain resources, where a set of frequency domain code domain resources includes one or more frequency domain code domain resources. One frequency domain code domain resource may be understood as a resource consisting of one PRB and one CS value.

In one implementation, if the common code domain resource corresponding to the N common PRBs is one CS pair, one common resource includes two frequency domain code domain resources obtained by combining one CS pair (referred to as a designated CS pair for convenience of description) with one PRB. In this implementation, the frequency domain code domain resource that each PRB of the N PRBs is composed of a specified CS pair is a common resource, and the frequency domain resource that the PRB is composed of other CS pairs is not a common resource. Alternatively, when the first terminal device transmits in the common resource, only one CS pair corresponding to the PRB may be used.

In another implementation, if the common code domain resource corresponding to the N common PRBs is one CS value, one common resource includes a frequency domain code domain resource obtained by combining one CS (for convenience of description, referred to as a specified CS) with one PRB. In this implementation, the frequency domain code domain resource composed of each PRB of the N PRBs and the specified CS is a common resource, and the frequency domain resource composed of the PRB and the other CS is not a common resource.

Alternatively, CS values corresponding to the N PRBs may be the same or different. The application is not limited in this regard. Optionally, the N frequency domain code domain resources may be first ordered according to an ascending order of CS values (0 to 11) and then ordered according to an ascending order of PRB indexes (or first ordered according to an ascending order of PRB indexes and then ordered according to an ascending order of CS values) in all frequency domain code domain resources corresponding to the N PRBs, and the common frequency domain code domain resources may be distributed according to a fixed step size. For example a step size of 6.

In another implementation manner, if the common code domain resources corresponding to the N common PRBs are all CS pairs configured in the resource pool, one common resource includes all frequency domain code domain resources corresponding to one PRB. That is, all the frequency domain code domain resources corresponding to the one PRB are not dedicated resources. Optionally, when the first terminal device transmits in the common resource, only one of all the frequency domain code domain resources corresponding to one PRB is used.

According to the scheme, the public resources are designed from the two dimensions of the frequency domain and the code domain, so that the code domain resources on the public PRB can be utilized more effectively.

The second set of PRBs includes m PRBs, which may be dedicated (scheduled) PRBs, m being an integer greater than or equal to 1. The m PRBs are used for transmission by one terminal device. A dedicated PRB may be understood as a PRB used by a certain terminal device. The dedicated PRBs used by different terminal devices are different. A dedicated PRB may be understood as a different PRB used by different terminal devices transmitting PSFCH on the same PSFCH time domain resource.

For ease of understanding, the second PRB set may be replaced with a second resource set, which includes m dedicated resources, and in particular may be m groups of frequency domain code domain resources. The design concept of the dedicated resource is similar to that of the common resource, and the description about the common resource in the first PRB may be referred to specifically, and the description will not be expanded again.

It can be appreciated that the PRBs occupied by the X PSFCH groups correspond to the same PSFCH opportunities (PSFCH occasion) in the time domain, that is, the PRBs occupied by the X PSFCH groups belong to the same PRB set corresponding to PSFCH occasion in the time domain. I.e. the time domain resources used by the X PSFCH are the same. Or it is understood that the first terminal device transmits the X PSFCH in the same time slot, or the first terminal device transmits the X PSFCH in the same PSFCH time domain resource. I.e. the resources used by the X PSFCH are all located in all time-frequency resources corresponding to the same PSFCH time-domain resource. Wherein PSFCH occasion may also be referred to as PSFCH symbols or PSFCH time domain resources.

Note that, if the automatic gain control (automatic gain control, AGC) symbol is not considered, the PSFCH timing may include a symbol (hereinafter, PSFCH symbols) for transmission PSFCH. The PSFCH symbol is a copy of PSFCH symbol (i.e., the content in PSFCH AGC and PSFCH symbols are identical) and is used as AGC.

The N common PRBs may be preconfigured, may be preset, or may be indicated by a network device. The three indications are in an OR relationship.

In one implementation, the N common PRBs may be a PRB specified in a PRB set corresponding to PSFCH opportunities.

For example, the N common PRBs may be PRBs of a bandwidth edge. For example, there may be two PRBs from the beginning to the end of the RB set (the smallest and largest index PRBs in the RB set). Or may be the first and last two PRBs in the resource pool (the smallest and largest index PRBs in the RB set).

As another example, as shown in fig. 3A, one PSFCH occasion includes PRBs with indexes 0 to 51, and the N common PRBs may include PRBs with indexes 0,5, 10, 15, 20, 25, 30, 35, 40, 45, and 50.

In the manner that the network device indicates the N common PRBs, the network device may specifically indicate, by using a bit map (bitmap), a common PRB in the PRB set corresponding to PSFCH opportunities. Or the network device indicates the common PRB in PSFCH resources corresponding to PSFCH symbols through a bit map. The PSFCH resource is a set of PRBs configured for transmission PSFCH among all PRBs corresponding to PSFCH symbols. Or the PSFCH resource is a set of PRBs configured to transmit PSFCH carrying HARQ information among all PRBs corresponding to PSFCH symbols. For example, the bit map may include Y bits, wherein one bit may indicate whether the corresponding PRB is a common bit, and Y is an integer greater than or equal to N. For example, if a value of one bit is a first value indicating that the corresponding PRB is a common bit, a value of a second value indicating that the corresponding PRB is not a common PRB. The first value may be 0, the second value may be 1, or the first value may be 1 and the second value may be 0. It can be understood that in the present application, the number of bits in the bit map, which is the first value, is N, indicating N common PRBs. The length of the bit map (i.e., the number of bits) may be less than or equal to the number of PRBs included in the PRB set corresponding to PSFCH opportunities.

The PRB corresponding to the first bit of the bit map may be preset, or may be preconfigured, or may be indicated by the network device, which is not specifically limited herein.

In a specific implementation manner, the first bit of the bit map may correspond to a PRB with the smallest index in the PRB set corresponding to PSFCH opportunities.

In an embodiment where the first PRB set includes N common resources, the N common resources may be composed of a resource (time-frequency resource) specified in the resource set corresponding to PSFCH opportunities and a corresponding CS pair. In the manner of indicating the network device, the network device may specifically be a common PRB in a PRB set corresponding to the PSFCH occasion indicated by a bit map (bitmap), and refer to the foregoing description specifically. The common PRB and the corresponding CS pair constitute a common resource. For example, the CS pair corresponding to the common PRB may be the first CS pair of the resource pool configuration. For example, the total number of CS pairs is 6 pairs {0,6}; {1,7}; {2,8}; {3,9}; {4,10}; {5,11}, the corresponding CS pair of the common PRB is {0,6}. Referring to fig. 3A, for example, one PSFCH occasion includes PRBs with indexes 0-51, and N common resources may include frequency domain code domain resources with indexes 0,5, 10, 15, 20, 25, 30, 35, 40, 45, 50 PRBs and corresponding CS pairs {0,6}, as shown in fig. 3B. The CS pair may be one of 6 CS pairs. The CS pair may be pre-set, or pre-configured, or indicated by the network device.

The N common resources may be composed of a resource (time-frequency resource) specified in a resource set corresponding to PSFCH opportunities and a corresponding CS value. In the manner of indicating the network device, the network device may specifically be a common PRB in a PRB set corresponding to the PSFCH occasion indicated by a bit map (bitmap), and refer to the foregoing description specifically. The common PRB and the corresponding CS pair constitute a common resource. For example, the CS value corresponding to the common PRB may be a first CS value among CS values configured for the resource pool. For example, the CS values of the resource pool configuration include 12, 0 respectively; 1, a step of; 2;3, a step of; 4, a step of; 5, a step of; 6, preparing a base material; 7, preparing a base material; 8, 8;9, a step of performing the process; 10;11, the CS value corresponding to the common PRB is 0. Referring to fig. 3A, for example, one PSFCH occasion includes PRBs with indexes 0 to 51, and N common resources may include frequency domain code domain resources consisting of PRBs with indexes 0,5, 10, 15, 20, 25, 30, 35, 40, 45, 50 and corresponding CS value 0, as shown in fig. 3C. The CS value may be one of 12 CS values. The CS value may be preset, or preconfigured, or indicated by the network device.

In another implementation manner, the N common PRBs may belong to one interleaved resource block, and the interleaved resource block may be an interleaved resource block specified in the interleaved resource block set corresponding to PSFCH opportunities. For example, the positions of the N common PRBs in the interleaved resource blocks may be preset, or may be preconfigured, or may be indicated by the network device.

For example, as shown in fig. 4, one PSFCH occasion includes PRBs with indexes 0 to 51, the PRBs with indexes 0 to 51 include interleaved resource blocks with indexes 1 to 5, and the interleaved resource blocks with indexes 1 may be regarded as a common PRB. The remaining PRBs are dedicated PRBs.

In the manner that the network device indicates the positions of the N common PRBs in the interleaved resource blocks, the positions of the N common PRBs in the interleaved resource blocks may be specifically indicated by a bit bitmap. The manner in which the network device indicates the positions of the N common PRBs in the interleaved resource blocks through the bit map is similar to the manner in which the network device may indicate the common PRBs in the PRB set corresponding to the PSFCH opportunities through the bit map, which is not explained here.

For example, the N common PRBs may default to be the largest index or the smallest index in the set of interleaved resource blocks corresponding to PSFCH opportunities, or the PRBs included in the interleaved resource blocks in the middle position.

In an embodiment where the first PRB set includes N common resources, the N common resources may be composed of PRBs included in one of the staggered resource blocks in the staggered resource block set corresponding to PSFCH opportunities and a corresponding CS pair. For example, the N common resources may be the largest index or the smallest index in the set of interleaved resource blocks corresponding to PSFCH opportunities in the frequency domain, or the PRBs included in the interleaved resource blocks in the middle position may correspond to one CS pair in the code domain. The CS pair may be one of 6 CS pairs. The CS pair may be pre-set, or pre-configured, or indicated by the network device.

Or the N common resources may include PRBs included in one interleaved resource block in the interleaved resource block set corresponding to PSFCH opportunities in the frequency domain, and one CS value in the code domain. The CS value may be one of 12 CS values. The CS value may be preset, or preconfigured, or indicated by the network device.

In the present application, the transmission of the first PSFCH of the X PSFCH occupies the first PRB set and the second PRB set corresponding to the first PSFCH. Or may be described as transmitting the first PSFCH over the first PRB set and the second PRB set corresponding to the first PSFCH. That is, the first PSFCH repeatedly transmits the first PSFCH on each PRB of the first PRB set and the second PRB set corresponding to the first PSFCH. The first PSFCH sent in the second PRB set is actually valid, that is, the receiving terminal device corresponding to the first PSFCH may not receive the first PSFCH transmitted on the first PRB set, and may receive the first PSFCH on the second PRB set corresponding to the first PSFCH. Since the first set of PRBs is a common set of PRBs. The transmission signals on the set of PRBs therefore include, but are not limited to, first PSFCH, so the receiving terminal device of first PSFCH cannot recognize first PSFCH. The receiving terminal device of the first PSFCH may receive the first PSFCH only on the dedicated PRBs corresponding to the first PSFCH.

The first PSFCH transmitted on the first PRB set may be the first PSFCH itself or a modification of the first PSFCH, for example, the first PSFCH after the cyclic shift processing. Optionally, the cyclic shift of any two first PSFCH sent on the first PRB set may be the same or different, and is not specifically limited herein. The first PSFCH is illustratively repeated on each PRB in the first PRB set. Or the first PSFCH repeatedly transmits on each PRB in the first PRB set and the CS value corresponding to PSFCH transmitted on each PRB is different. The first PSFCH repeats transmission on each PRB in the second PRB set. Or the first PSFCH repeatedly transmits on each PRB in the second PRB set and the CS value corresponding to PSFCH transmitted on each PRB is different. The first PSFCH is understood here to be either PSFCH format 0 or PSFCH sequence, the CS value corresponding to PSFCH being the CS value corresponding to PSFCH sequence.

Optionally, the first terminal device may determine the second PRB set corresponding to the first PSFCH by: and determining a second PRB set corresponding to the first PSFCH from the PRB sets corresponding to the PSFCH time according to the position of the resource used by the data corresponding to the first PSFCH.

For example, the second PRB set corresponding to the first PSFCH may be determined from the dedicated PRB set corresponding to the PSFCH opportunity according to the starting subchannel or all subchannels of the subchannels used by the data corresponding to the first PSFCH and the time slot in which the data is located. The dedicated PRB set corresponding to the PSFCH timing is a set of remaining PRBs excluding the common PRB set from all PSFCH resources corresponding to the PSFCH timing.

In one embodiment, the first terminal device determines an available PRB set according to the time slot and the subchannel, and determines available frequency domain code domain resources in the frequency domain code domain resources corresponding to the PRB set. Assuming that all code domain resources corresponding to the common PRB set are not dedicated resources, the corresponding PRB set in PSFCH slots may be determined according to slots and subchannels, and specifically, the PRB set may include indexes belonging toIs not allocated to the PRBs.

Wherein,

N _subch is the number of subchannels. Here, it can be understood that one RB set includes a subchannel or one subchannel included in one resource pool.

Is the number of PSSCH slots corresponding to PSFCH occasions, and the PSSCH transmitted by the PSSCH slots feeds back corresponding HARQ information in the PSFCH occasions. Wherein, the time slot where PSFCH opportunities are located is PSSCH time slot, and after N time slots are separated, the first time slot includes PSFCH resources. Where N is the minimum value.

Is the number of PRBs in the dedicated PRB set used for transmission PSFCH.

The number of PRBs in the PRB set corresponding to a single sub-channel of a single slot. The number of second PRB sets may be less than or equal toWhereinThe number of sub-channels used for 1 or for PSSCH. I.e., more than one sub-channel is used for the PSSCH, the PSFCH resources corresponding to each sub-channel in the plurality of sub-channels may be used to transmit the PSFCH corresponding to the data.

The frequency domain code domain resource corresponding to the first PSFCH is: wherein/> Is the number of CS pairs configured within the resource pool.

In another embodiment, the first terminal device determines, according to the number of start sub-channels or sub-channels used by the data corresponding to the first PSFCH and the time slot where the first terminal device is located, a set of resources available for transmitting the first PSFCH from PSFCH resources corresponding to the PSFCH opportunity. The number of frequency domain code domain resources in the first PSFCH available set of resources is transmitted asWhereinIs the number of total PSFCH resources corresponding to PSFCH occasions. /(I)The number of common PRBs and common code domain resources corresponding to the common PRBs may be one CS value or one CS pair or all CS pairs in the resource pool. The meaning of the other parameters is referred to in the foregoing description and will not be repeated here.

The first PSFCH available resource set may be ordered according to the frequency domain resources and then according to the code domain resources. Or may be ordered according to the code domain resources first and then ordered according to the frequency domain resources. Specifically, the sorting according to the frequency domain resources is sorted according to the order of the PRB indexes from small to large or sorted according to the ascending order of the PRB indexes. The sorting is according to the code domain resource, the sorting is according to the order of CS from small to large or the ascending order of CS.

Note that, the PSFCH resources may include only PSFCH resources for transmitting the bearer HARQ information. Or the PSFCH resources may include only PSFCH resources for transmitting bearer collision information. Or the PSFCH resources may include PSFCH resources for transmitting collision information or HARQ information.

Optionally, the first set of resources is N common resources (frequency domain code domain resources). The dedicated resource set is a dedicated PSFCH resource set except for the N common resources in all PSFCH resources corresponding to PSFCH opportunities. Namely, the dedicated resource set is the set of the remaining resources excluding the N common resources in all PSFCH resources corresponding to PSFCH times. Here, the N common resources may be 1 CS pair corresponding to the N PRBs, or one CS value corresponding to the N PRBs, or all CS pairs in the resource pool corresponding to the N PRBs. Here, the N PRBs may correspond to the same CS value or different PRBs may correspond to different CS values. Or N PRBs may correspond to the same CS pair or different PRBs may correspond to different CS pairs.

The frequency domain code domain resource corresponding to the first PSFCH isWhereinIs the number of CS pairs configured within the resource pool. /(I)The frequency domain resource may be a common code domain resource. Wherein. The common resource is a common CS value corresponding to a common PRB, and then the CS value (common CS value+6) corresponding to the common CS value is used for the multicast option1. The determination method of the frequency domain code domain resource corresponding to the first PSFCH is the same as that described above, and the description thereof will not be repeated here, except that in this embodiment,Is a set of PRBs (including dedicated PRBs and common PRBs) for transmission PSFCH. In this case, the number of m dedicated resources may be less than or equal to the number of frequency domain code domain resources corresponding to the first PSFCH.

For convenience of description, the N PRBs in the first PRB set are hereinafter referred to as common PRBs, and the m PRBs in the second PRB set are all referred to as dedicated PRBs.

Note that, if the second PRB set corresponding to each PSFCH is different, the number m of PRBs included in the second PRB set may be the same or different, which is not limited by the present invention.

Optionally, the transmission power of the first PSFCH on any PRB of the first PRB set is less than or equal to the transmission power on any PRB of the second PRB set. That is, the transmit power of the first PSFCH on any common PRB is less than or equal to the transmit power on any dedicated PRB.

In a possible implementation, the transmission power of the first PSFCH on any one PRB of the first PRB set and the second PRB set is obtained by equally dividing the transmission power of the first PSFCH according to the total number of PRBs (i.e., n+m) included in the first PRB set and the second PRB set. In this way, the transmission power of the first PSFCH on any two occupied PRBs is the same.

Exemplary, the transmit power of the first PSFCH on any occupied PRB is the transmit power of the first PSFCHOr the transmission power of the first PSFCH on any occupied PRB satisfies the following formula: p _PSFCH1-10log₁₀ (n+m) [ dBm ], where P _PSFCH1 is the transmit power of first PSFCH.

Taking the example that one transmission of PSFCH occupies one PRB, in this example, m=1, the first PSFCH repeatedly transmits n+1 times on N common PRBs and one dedicated PRB, and the transmission power of the first PSFCH on any occupied PRB (i.e. the transmission power of each first PSFCH) is the transmission power of the first PSFCHOr the transmission power of the first PSFCH on any occupied PRB satisfies the following formula: p _PSFCH1-10log₁₀ (n+1) [ dBm ], where P _PSFCH1 is the transmit power of first PSFCH.

It can be seen that in the above implementation, the transmit power of the first PSFCH on any PRB in the first set of PRBs (i.e., any common PRB) is equal to the transmit power on any PRB in the second set of PRBs (i.e., any dedicated PRB).

The larger the number of m (the larger the value of m), the higher the total power on the second set of PRBs, i.e. the higher the allocated power of PSFCH carrying the valid information, the higher the probability of successful reception for the terminal device receiving the first PSFCH, the better the performance can be guaranteed.

In another possible implementation, the total transmit power of the first PSFCH over the first set of PRBs (i.e., the N common PRBs) and the total transmit power over the second set of PRBs (i.e., the m dedicated PRBs) are determined based on the transmit power of the first PSFCH and the adjustment factor. The adjustment factor may be a fixed value, a preset value, a preconfigured value, a value indicated by the network device, or the like.

In one example, the first PSFCH total transmit power over the first set of PRBsThe following formula is satisfied:

In another example, the first PSFCH total transmit power over the first set of PRBsThe following formula is satisfied:

wherein β1 is an adjustment factor.

In yet another example, the first PSFCH is a total transmit power over the first set of PRBsThe following formula is satisfied:

wherein β2 is an adjustment factor.

Optionally, the size of the adjustment factor may be adjusted such that the transmission power of the first PSFCH on any common PRB is less than or equal to the transmission power on any dedicated PRB. For example, α1 may be less than or equal toTaking the example that one PSFCH transmission occupies one PRB, in this example, m=1, the α1 may be smaller thanAlternatively, the total power of the first PSFCH on the common PRB may be smaller than or equal to the total power of the second PRB, where α1 may be smaller than or equal to 1/2.

For another example, β1 may be greater than or equal toAlternatively, the above mentioned β1 is smaller thanTaking the example that one transmission of PSFCH occupies one PRB, in this example, m=1, the above β1 may be greater than or equal toFor another example, β2 may be 0 or more. Alternatively, the above beta 2 is less thanTaking the example that one PSFCH transmission occupies one PRB, in this example, m=1, the β2 may be greater than or equal to 0.

In yet another example, the first PSFCH total transmit power over the second set of PRBsIs greater than a power threshold that is less than the transmit power of the first PSFCH. The remaining power of the transmit power of the first PSFCH minus the power threshold is the total transmit power of the first PSFCH over the first set of PRBs. The power threshold may be preset, or preconfigured, or indicated by the network device.

In yet another example, the transmit power of the first PSFCH on one PRB of the second PRB set is derived from the power and the adjustment factor of the transmit power of the first PSFCH that is equally divided over the PRBs occupied by the first PSFCH. The remaining power (the transmit power of the first PSFCH minus the total transmit power of the first PSFCH on the second set of PRBs) is used for transmission on the first set of PRBs. Specifically, the transmission power of the first PSFCH on each PRB in the second PRB set isThe first PSFCH total transmit power/>, over the second set of PRBsThe following formula is satisfied:

First PSFCH Total transmit Power on first PRB set The following formula is satisfied:

the transmission power of the first PSFCH on each PRB in the first set of PRBs is

Wherein P ¹ is the transmission power of the first PSFCH, α2 is the adjustment factor, and α2 is greater than 0.

Further, the adjustment factor or power threshold may be related to the degree of channel congestion, the number of LBT failures, the number of retransmissions, etc. Specifically, the greater the channel congestion level, the smaller the adjustment factor α1, the greater the adjustment factor β1, and the greater the adjustment factor β2, and the greater the total transmit power of the first PSFCH on the second PRB set. This is because the power for transmitting effective information should be increased to ensure performance when the channel is congested. The power of the effective information allocation should be increased to ensure the performance even if the LBT fails too much, and the power of the effective information allocation should be increased to ensure the performance even if the retransmission fails too much.

Since the power that would have been used to transmit the first PSFCH on one dedicated PRB is used to transmit the first PSFCH (i.e., the first PSFCH is transmitted on one dedicated PRB and on N common PRBs) under the limit of the maximum transmit power of the first terminal device, PSFCH of the common PRB transmission is not valid. And thus may result in a decrease in the transmit power of the first PSFCH transmitted on the dedicated PRB. In the above manner, by reducing the transmission power of the first PSFCH on the common PRB and increasing the transmission power of the first PSFCH on the dedicated PRB, the signal quality of the effective signal (i.e., the first PSFCH transmitted on the dedicated PRB) is improved, so that the transmission performance is improved.

Alternatively, in the above two examples, the transmission power of the first PSFCH on any PRB (i.e., any common PRB) in the first PRB set may be Or satisfies the following formula: /(I)

The transmit power of the first PSFCH on any PRB (i.e., any dedicated PRB) in the second PRB set may be Or satisfies the following formula: /(I)

Optionally, the transmission of the first PSFCH in the first PRB set and the second PRB set meets a power spectral density limit (PSD limit). If the transmission of the first PSFCH in the first and second PRB sets does not meet the power spectral density limit, the transmission of a portion of the first PSFCH in the first and second PRB sets may be discarded. Or change PRB resources in the second PRB set. I.e. select resources from the first PSFCH available set of resources that can meet the PSD limit.

The manner of transmission of the first PSFCH of the X PSFCH is described above. The manner of transmission of the other PSFCH of the X PSFCH is described below.

In one possible embodiment, the other PSFCH of the X PSFCH are transmitted in the same manner as the first PSFCH.

Taking the second PSFCH of the X PSFCH as an example, the second PSFCH may also occupy the first PRB set and a second PRB set corresponding to the second PSFCH. It is to be appreciated that the first PSFCH is the same as the first set of PRBs occupied by the second PSFCH, and the second set of PRBs occupied is different.

The transmission power of the second PSFCH is allocated on the occupied PRB in the same manner as the transmission power of the first PSFCH is allocated on the occupied PRB. The allocation manner of the transmission power of the second PSFCH on any occupied PRB may specifically refer to the allocation manner of the transmission power of the first PSFCH on any occupied PRB, and will not be described herein.

For example, taking PSFCH timing shown in fig. 4 as an example, assuming that X PSFCH includes PSFCH #1 to PSFCH #5 and one transmission of one PSFCH occupies 1 PRB, the manner of the X PSFCH is: the transmission of PSFCH #1 occupies all 11 PRBs of the interleaved resource block #1 and the first PRB of the interleaved resource block # 2. The transmission of PSFCH #2 occupies all 11 PRBs of the interleaved resource block #1 and the first PRB of the interleaved resource block # 3. The transmission of PSFCH #3 occupies all 11 PRBs of the interleaved resource block #1 and the first PRB of the interleaved resource block # 4. The transmission of PSFCH #4 occupies all 11 PRBs of the interleaved resource block #1 and the first PRB of the interleaved resource block # 5. The transmission of PSFCH occupies all 11 PRBs of the interleaved resource block #1 and the second PRB of the interleaved resource block # 2. As shown in fig. 5.

Alternatively, in the above embodiment, the transmission power of each PSFCH of the X PSFCH may be determined in the following manner 1 or manner 2.

Mode 1: the maximum transmission power P _{Total (S)} of the first terminal device may be obtained by equally dividing the maximum transmission power P _{Total (S)} according to the value of X. The transmission power of any one PSFCH of the X PSFCH may be the maximum transmission power P _{Total (S)} of the first terminal deviceI.e., P _i＝P_{Total (S)}-10log₁₀ X [ dBm ].

For example, in the case where the higher layer parameters dl-P0-PSFCH are not provided, the transmit power P _i of each PSFCH of the X PSFCH may satisfy: p _i＝P_{Total (S)}-10log₁₀ X [ dBm ]. Wherein P _i＝P_{Total (S)}-10log₁₀ X [ dBm ] is equivalent to

Mode 2: the transmission power of each PSFCH of the X PSFCH may be determined according to at least one of a priority of at least one PSFCH to be transmitted, a maximum transmission number of PSFCH, and a maximum transmission power of the first terminal device, wherein the at least one PSFCH includes X PSFCH.

The transmission power of each PSFCH of the X PSFCH will be described below in connection with the different determination of the X PSFCH in S301.

In connection with example a above, P _i＝P_PSFCH,one, that is, the transmission power of each PSFCH of the X PSFCH is P _PSFCH,one.

In connection with example B, P _i＝min(P_{Total (S)}-10log₁₀X,P_PSFCH,one above), that is, the transmission power of each PSFCH of the X pieces PSFCH is min (P _{Total (S)}-10log₁₀X,P_PSFCH,one).

In combination with the above example C, P _i＝P_PSFCH,one, that is, the transmission power of each PSFCH of the X PSFCH is P _PSFCH,one.

In connection with example D, P _i＝min(P_{Total (S)}-10log₁₀X,P_PSFCH,one above), that is, the transmission power of each PSFCH of the X pieces PSFCH is min (P _{Total (S)}-10log₁₀X,P_PSFCH,one).

In another possible embodiment, the other PSFCH of the X PSFCH are sent in a different manner than the first PSFCH. Taking the second PSFCH of the X PSFCH as an example, the second PSFCH may also occupy a second PRB set corresponding to the second PSFCH. It is to be appreciated that the first PSFCH is different from the second set of PRBs occupied by the second PSFCH. The difference here may be understood as different frequency domain resources, or may be understood as different frequency domain code domain resources (specifically, may include two cases of different frequency domain resources and different same code domain resources of the frequency domain resources).

This embodiment differs from the previous embodiment in that each PSFCH's transmission occupies both common and dedicated PRBs, whereas only one PSFCH (i.e. first PSFCH) transmission occupies both common and dedicated PRBs in this embodiment, and the other PSFCH's transmission occupies only dedicated PRBs. Under the method, the requirement of minimum occupied bandwidth can be met, and excessive power transmission invalid information is avoided.

Illustratively, in the above embodiment, the first PSFCH may be PSFCH with the lowest priority among the X PSFCH. Taking the example of a smaller priority value and a higher priority, the first PSFCH may be PSFCH with the largest priority value among the X PSFCH. In a specific example, if X PSFCH are PSFCH carrying HARQ information, the first PSFCH may be PSFCH with the largest priority value in X PSFCH. If X PSFCH include PSFCH for carrying HARQ information and PSFCH for carrying collision information, the first PSFCH may be PSFCH for carrying collision information with the largest priority value in X PSFCH.

For example, taking PSFCH times shown in fig. 4 as an example, assume that X PSFCH include PSFCH #1 to PSFCH #5 and that the priority of psfch#1 is lowest. If one PSFCH occupies 1 PRB per transmission, the manner of the X PSFCH is: the transmission of PSFCH #1 occupies all 11 PRBs of the interleaved resource block #1 and the first PRB of the interleaved resource block # 2. The transmission of PSFCH #2 occupies the first PRB of the interleaved resource block # 3. The transmission of PSFCH #3 occupies the first PRB of the interleaved resource block # 4. The transmission of PSFCH #4 occupies the first PRB of the interleaved resource block # 5. The transmission of PSFCH #4 occupies the second PRB of the interleaved resource block # 2. As shown in fig. 6.

The transmit power of the second PSFCH on any PRB in the second PRB set (i.e., any dedicated PRB) may be the transmit power of the second PSFCH on the second PSFCHTaking an example that one PRB is occupied by one PSFCH in one transmission, in this example, m=1, the transmission power of the second PSFCH on the occupied dedicated PRB is the transmission power of the second PSFCH.

In the above embodiment, the transmission power of each PSFCH of the X PSFCH can be determined by the following mode 1 or mode 2 or mode 3. Mode 1 and mode 2 are described above, and the description thereof will not be repeated.

Mode 3: taking PSFCH #1 of the X PSFCH as an example, the transmission power of PSFCH #1 may be determined according to the maximum transmission power of the first terminal device, the total number of PRBs occupied by the X PSFCH (i.e., n+x×m), and the number of PRBs occupied by the PSFCH #1. If one PSFCH occupies one PRB, this manner can also be described as: the transmission power of PSFCH #1 may be determined according to the maximum transmission power of the first terminal device, the total number of transmissions of X PSFCH, and the number of transmissions of PSFCH #1.

For example, the transmission power of the first PSFCH is determined according to the maximum transmission power P _{Total (S)} of the first terminal device, the total number of PRBs occupied by X PSFCH (i.e., n+x×m), and the number of PRBs occupied by the first PSFCH (i.e., n+m). Illustratively, the transmit power P ¹ of the first PSFCH satisfies the following equation:

Taking an example that one transmission of PSFCH occupies one PRB, in this example, the transmission power P ¹ of the first PSFCH with m=1 satisfies the following formula:

The transmission power of the second PSFCH is determined according to the maximum transmission power P _{Total (S)} of the first terminal device, the total number of PRBs occupied by X PSFCH (i.e., n+x×m), and the number of PRBs occupied by the second PSFCH (i.e., m). Illustratively, the transmit power P ¹ of the first PSFCH satisfies the following equation:

Taking an example that one transmission of PSFCH occupies one PRB, in this example, the transmission power P ² of the second PSFCH with m=1 satisfies the following formula:

In the application, the SL communication of the first terminal equipment can meet the OCB requirement by sending the first PSFCH on the public PRB. And, by reducing the transmission power of the first PSFCH on the common PRB and increasing the transmission power of the first PSFCH on the dedicated PRB, the signal quality of the effective signal (i.e., the first PSFCH transmitted on the dedicated PRB) is improved, so as to improve the transmission performance. Therefore, the transmission performance of PSFCH can be improved on the premise of meeting the OCB requirement through the mode.

In addition, in the scheme that the transmission modes of the X PSFCH are the same, that is, each PSFCH transmission occupies N public PRBs and one dedicated PRB, implementation complexity is low.

In the scheme that the transmission of the first PSFCH occupies N public PRBs and one dedicated PRB in X PSFCH and the transmission of the other PSFCH occupies only one dedicated PRB, the number of PSFCH transmitted on the public PRBs can be reduced, so that the transmission power of an effective signal (that is, PSFCH carried on the dedicated PRB) can be improved, and further, the signal quality of the effective signal (that is, PSFCH transmitted on the dedicated PRB) can be improved, and the transmission performance can be improved. Therefore, the transmission performance of PSFCH can be further improved on the premise of meeting the OCB requirement through the mode.

The application provides a flow diagram of another side-by-side communication method. This method differs from the method shown in fig. 2 in that at least one PSFCH of the transmissions in the method shown in fig. 2 occupies N PRBs and m dedicated PRBs, whereas the transmission of one PSFCH in the present side-by-side communication method occupies only N common PRBs, and the transmission of the other PSFCH occupies only dedicated PRBs.

Referring to fig. 7, a flow chart of another side-line communication method provided by the present application includes:

s701, a first terminal device receives X sidestream data, wherein X is an integer greater than or equal to 1.

S701 may be specifically referred to the above description of S201, and the description will not be repeated here.

S702, the first terminal device sends Y PSFCH, wherein Y is an integer greater than or equal to X.

Wherein, the transmission of PSFCH #a in Y PSFCH occupies a first PRB set, and the transmission of PSFCH #b in Y PSFCH occupies a second PRB set corresponding to PSFCH #b. It will be appreciated that PSFCH #a corresponds to the first PSFCH in the second aspect of the inventive content and that psfch#b corresponds to the second PSFCH in the second aspect of the inventive content.

The first PRB set and the second PRB set may be referred to in the method described in fig. 2, and the description thereof will not be repeated here.

In a first possible embodiment, Y PSFCH are X PSFCH corresponding to the X sidestream data. In this manner, y=x.

In this scenario PSFCH #a can be any one PSFCH of the X PSFCH.

In a specific example, PSFCH #a may be PSFCH with the lowest priority among the X PSFCH. Taking the example of a smaller priority value and a higher priority value, PSFCH #a may be PSFCH where the priority value is the largest among X PSFCH. In a specific example, if X PSFCH are PSFCH carrying HARQ information, PSFCH #a may be PSFCH with the largest priority value in X PSFCH. If X PSFCH include PSFCH for carrying HARQ information and PSFCH for carrying collision information, PSFCH #a may be PSFCH for carrying collision information with the largest priority value in X PSFCH.

In another specific example, PSFCH #a may be selected among X PSFCH at the time of implementation by the first terminal device. Optionally, PSFCH #a may be PSFCH corresponding to the smallest side line data in the retransmission times in the X side line data.

For example, taking PSFCH times shown in fig. 4 as an example, assume that X PSFCH include PSFCH #1 to PSFCH #5 and that the priority of psfch#1 is lowest. If one PSFCH occupies 1 PRB per transmission, the manner of the X PSFCH is: the transmission of PSFCH #1 occupies all 11 PRBs of the interleaved resource block # 1. The transmission of PSFCH #2 occupies the first PRB of the interleaved resource block # 2. The transmission of PSFCH #3 occupies the first PRB of the interleaved resource block # 3. The transmission of PSFCH #4 occupies the first PRB of the interleaved resource block # 4. The transmission of PSFCH #4 occupies the second PRB of the interleaved resource block # 5. As shown in fig. 8.

In a second embodiment, Y PSFCH includes X PSFCH corresponding to X sidestream data and one preconfigured (or predefined) PSFCH. In this embodiment, y=x+1. Optionally, the preconfigured (or predefined) PSFCH above is randomly generated PSFCH. I.e. the information carried in PSFCH is not limited. The information carried in PSFCH may be any CS value corresponding to PSFCH sequence. Or PSFCH is PSFCH sequence with CS value 0. Or it may also be appreciated that PSFCH transmitted on the first PRB set may be generated at any time. In one exemplary illustration, the preconfigured (or predefined) PSFCH described above may include one or more randomly generated PSFCH. Or it may be understood that PSFCH transmitted on the first PRB set may be generated at any time, and PSFCH transmitted on any two PRBs in the first PRB set may be the same or different, which is not specifically limited herein.

In this scenario PSFCH #a may be pre-configured (or pre-defined) PSFCH as described above.

For example, taking PSFCH timing shown in fig. 4 as an example, assuming that X PSFCH includes PSFCH #1 to PSFCH #5 and one transmission of one PSFCH occupies 1 PRB, the manner of the Y PSFCH is: the transmission of preconfigured PSFC1 occupies all 11 PRBs of the interleaved resource block # 1. The transmission of PSFCH #1 occupies the first PRB of the interleaved resource block # 2. The transmission of PSFCH #2 occupies the first PRB of the interleaved resource block # 3. The transmission of PSFCH #3 occupies the first PRB of the interleaved resource block # 4. The transmission of PSFCH #4 occupies the first PRB of the interleaved resource block # 5. The transmission of PSFCH occupies the second PRB of the interleaved resource block # 2. As shown in fig. 9.

Alternatively, the determination manner of the transmission power of each PSFCH of the above Y PSFCH may be specifically referred to the related description in the foregoing manners 1 to 3, and the description is not repeated here. It should be noted that, in the second embodiment, the priority of PSFCH that is preconfigured (or predefined) may be the highest priority. Optionally, the pre-configured (or predefined) PSFCH priorities are pre-configured or configured by the network device. Illustratively, the priority may have a value in the range of positive integers 1 to 8.

Optionally, the transmission power of PSFCH #a on any PRB of the first PRB set (i.e., any common PRB) is obtained by equally dividing the transmission power of PSFCH #a according to the total number of PRBs included in the first PRB set (i.e., the total number of common PRBs N). If one PSFCH occupies one PRB, this manner can also be described as: the transmission power of PSFCH #a per transmission is obtained by equally dividing the total transmission power of PSFCH #a according to the number of transmissions of PSFCH #a (i.e., N).

Exemplary, the transmit power of PSFCH #a on any occupied PRB is PSFCH #a

The transmission power of PSFCH #b on any PRB of the second PRB set (i.e., any dedicated PRB) is obtained by equally dividing the transmission power of PSFCH #b according to the total number m of PRBs included in the second PRB set. Exemplary, the transmit power of PSFCH #b on any occupied PRB is PSFCH #bTaking an example that one transmission of PSFCH occupies one PRB, in this example, m=1, the transmission power of psfch#b on the corresponding dedicated PRB is the total transmission power of PSFCH #b. /(I)

In the application, through sending PSFCH on the public PRB, the SL communication of the first terminal device can meet the OCB requirement. And, the signal quality of PSFCH with high priority can be ensured by sending PSFCH with the lowest priority or pre-configured PSFCH on the public PRB, so that the transmission performance is improved. Therefore, the transmission performance of PSFCH can be improved on the premise of meeting the OCB requirement through the mode.

In addition, in the above manner, the transmission of one PSFCH occupies N public PRBs, while the transmission of the other PSFCH occupies only dedicated PRBs, so that the number of PSFCH transmitted on the public PRBs can be reduced, and thus the transmission power of an effective signal (namely PSFCH carried on the dedicated PRB) can be improved, and further the signal quality of the effective signal (namely PSFCH transmitted on the dedicated PRB) can be improved, and the transmission performance can be improved. Therefore, the transmission performance of PSFCH can be further improved on the premise of meeting the OCB requirement through the mode.

The application also provides another side communication method. The method comprises the following steps: the first terminal equipment successfully accesses a channel before a first initial symbol or a first initial symbol in a first time slot; the first terminal equipment starts to transmit sidestream data at the first starting symbol, wherein the sidestream data is borne on a PSSCH; wherein the first time slot includes the first start symbol and a second start symbol, and the second start symbol is a symbol after the first start symbol; the first start symbol and the second start symbol are automatic gain control (automatic gain control, AGC) symbols. The first start symbol is a copy of a next symbol to the first start symbol and the second start symbol is a copy of a first symbol to the second start symbol. Correspondingly, the second terminal device receives the PSSCH and the corresponding PSCCH after the first start symbol. And the second terminal equipment performs AGC at a second initial position.

Optionally, the symbols used in rate matching of the PSSCH do not include the first start symbol and the second start symbol.

The second start symbol may be understood as a candidate start symbol for transmission of PSCCH/PSSCH. The candidate start symbol is an AGC symbol and is therefore not used to transmit a truly valid PSCCH/psch. The second starting symbol may be a copy of the next symbol or one of the occupied symbols for other PSCCH/PSSCH transmissions.

The first starting symbol described above may be understood as a candidate starting symbol for transmission of the PSCCH/PSSCH. When the first terminal device successfully accesses the channel at or before the first starting symbol, the PSSCH and corresponding PSCCH are transmitted from the first starting symbol. Accordingly, when the first terminal device successfully accesses the channel after the first start symbol, the second start symbol or before, the PSSCH and the corresponding PSCCH are transmitted from the second start symbol.

The first start symbol may be a first symbol in the first slot. Taking a conventional cyclic prefix (normal cyclic prefix, NCP) as an example, 14 symbols are included in a slot, and are respectively marked as symbol 0, symbol 1, symbol 2, symbol 3, symbol 4, symbol 5, symbol 6, symbol 7, symbol 8, symbol 9, symbol 10, symbol 11, symbol 12 and symbol 13 according to time domain sequence. Where the first symbol in the first slot is symbol 0.

The second starting symbol may be a sixth symbol in the first slot. I.e. the second starting symbol may be symbol 5. When the length of time domain resource occupied by the transmission of the PSSCH and the corresponding PSCCH is 13 and the length of time domain occupied by the PSCCH is 2:

the DMRS time domain positions of 2 symbols include symbol 3 and symbol 10;

the DMRS time domain positions of 3 symbols include symbol 1, symbol 6, and symbol 11;

The DMRS time domain positions of 4 symbols include symbol 1, symbol 4, symbol 7, symbol 10;

When the length of time domain resource occupied by the transmission of the PSSCH and the corresponding PSCCH is 13 and the length of time domain occupied by the PSCCH is 3:

the DMRS time domain positions of 2 symbols include symbol 4 and symbol 10;

Therefore, when the second start symbol is symbol 5, the DMRS symbol in any configuration is not affected. The DMRS may be guaranteed to be unaffected by the second start symbol to guarantee demodulation performance.

Or the second starting symbol is a first symbol in the first slot and a first symbol after the first symbol that does not include the PSSCH demodulation reference signal (demodulation REFERENCE SIGNAL, DMRS). Wherein the first symbol is the next symbol of the symbols occupied by the PSCCH in the first slot or the fifth symbol. When the PSCCH occupies symbols 1 and 2, the first symbol is symbol 3. When the PSCCH occupies symbols 1,2 and 3, the first symbol is symbol 4. So that the second starting symbol affects neither the PSCCH symbol nor the DMRS symbol.

Optionally, the resource pool corresponding to the first terminal device includes a resource block set, where the resource pool is a resource set for the first terminal device to perform side communication.

In a possible implementation manner, the first terminal device may further send reference signal indication information, where the reference signal indication information indicates a time domain position of a DMRS symbol of the PSSCH, and the time domain position of the DMRS symbol does not include a position of the second start symbol. For example, if the second starting symbol is symbol 4, when the first terminal device sends the reference signal indication information, the time domain position of the DMRS symbol indicated by the reference signal indication information does not include the position of symbol 4. For example, when the length of time domain resource occupied by the transmission of the psch and the corresponding PSCCH is 13 and the length of time domain occupied by the PSCCH is 3:

the DMRS time domain positions of 2 symbols include symbol 4 and symbol 10;

the first terminal device may indicate a DMRS time domain position of 3 symbols at this time. So that the second AGC symbol does not affect demodulation performance by the DMRS.

Optionally, the first terminal device receives first enabling information, where the first enabling information is used to determine whether one starting symbol (a first starting symbol) is included in a time slot or two starting symbols (a first starting symbol and a second starting symbol) are included in a time slot supported in the resource pool. The first enabling information is from a network device or the first enabling information is preconfigured.

Optionally, the position of the second start symbol in the first slot is configured or preconfigured by a network device. Wherein the position of the second starting symbol is from a set of candidate positions comprising one or more elements of the following sets: {4,5,6,7}. The set of candidate locations is configured or preconfigured or predefined by the network device.

Based on the same inventive concept as the method embodiment, the embodiment of the present application provides a communication device, which may have a structure as shown in fig. 10, including a communication module 1001 and a processing module 1002. The processing module 1002 is configured to process algorithms, software, programs, storage, etc. involved in the communication process. The communication module 1001 is configured to transmit and receive signals, and optionally, the communication module 1001 may include a transmitting module configured to transmit wireless signals and a receiving module configured to receive wireless signals.

In a specific embodiment, the communication device may be specifically configured to implement the method performed by the first terminal device in the embodiment described in fig. 2, where the device may be the first terminal device itself, or may be a chip or a chipset in the first terminal device or a part of a chip for performing the functions of the related method. The communication module 1001 is configured to communicate with other terminal devices. The processing module 1002 is configured to receive X sidestream data through the communication module 1001, where X is an integer greater than or equal to 1; and, transmitting X PSFCH corresponding to the X sidestream data through the communication module 1001; wherein, the transmission of the first PSFCH in the X PSFCH occupies a first PRB set and a second PRB set corresponding to the first PSFCH; the first PRB set comprises N PRBs, the N PRBs are public PRBs, the second PRB set comprises m PRBs, N is an integer greater than 1, and m is an integer greater than or equal to 1; the first PSFCH has a transmit power on any PRB of the first set of PRBs that is less than or equal to a transmit power on any PRB of the second set of PRBs.

The transmission power of the first PSFCH on any one PRB of the first PRB set and the second PRB set is obtained by equally dividing the transmission power of the first PSFCH according to the total number of PRBs included in the first PRB set and the second PRB set.

The total transmit power of the first PSFCH over the first set of PRBs and the total transmit power of the second set of PRBs are determined according to the transmit power of the first PSFCH and the adjustment factor.

Exemplary, the first PSFCH is the total transmit power over the first set of PRBsThe following formula is satisfied:

The first set of PRBs illustratively includes all or part of the PRBs in one interleaved resource block.

For example, a second PSFCH of the X PSFCH occupies the first PRB set and a second PRB set corresponding to the second PSFCH.

The transmission power of the first PSFCH is obtained by equally dividing the maximum transmission power of the first terminal device according to the value of X;

Or the transmission power of the first PSFCH is determined according to at least one of the priority of at least one PSFCH to be transmitted, the maximum transmission number of PSFCH, and the maximum transmission power of the first terminal device, where at least one PSFCH includes X PSFCH.

The transmission of the second PSFCH of the X PSFCH occupies a second PRB set corresponding to the second PSFCH.

The transmission power of the first PSFCH is determined according to the maximum transmission power of the first terminal device, the total number of PRBs occupied by X PSFCH, and the number of PRBs occupied by the first PSFCH, for example.

Illustratively, the transmit power P ¹ of the first PSFCH satisfies the following equation:

Illustratively, the first PSFCH is the lowest priority PSFCH of the X PSFCH.

In a specific embodiment, the communication apparatus may be specifically configured to implement the method performed by the first terminal device in the embodiment illustrated in fig. 7, where the apparatus may be the first terminal device itself, or may be a chip or a chipset in the first terminal device or a part of a chip for performing the functions of the related method. The communication module 1001 is configured to communicate with other terminal devices.

The processing module 1002 is configured to receive X sidestream data through the communication module 1001, where X is an integer greater than or equal to 1; and, transmitting Y PSFCH, Y being an integer greater than or equal to X, through the communication module 1001; wherein, the transmission of the first PSFCH in Y PSFCH occupies a first PRB set, and the transmission of the second PSFCH in Y PSFCH occupies a second PRB set corresponding to the second PSFCH; the first PRB set comprises N PRBs, and the N PRBs are public PRBs; the second set of PRBs includes m PRBs; n is an integer greater than 1, and m is an integer greater than or equal to 1.

Illustratively, Y PSFCH are X PSFCH corresponding to X sidestream data, and the first PSFCH is PSFCH with the lowest priority among X PSFCH.

Illustratively, y=x+1, Y PSFCH includes X PSFCH corresponding to the X sidestream data and one preconfigured or predefined PSFCH, the first PSFCH being preconfigured or predefined PSFCH.

The transmission power of the first PSFCH on any PRB of the first PRB set is obtained by equally dividing the transmission power of the first PSFCH according to the total number of PRBs included in the first PRB set.

The transmission power of the second PSFCH on any PRB of the second PRB set is obtained by equally dividing the transmission power of the second PSFCH according to the total number of PRBs included in the second PRB set.

The first set of PRBs includes all or part of the PRBs in one or more interleaved resource blocks.

The transmission power of the first PSFCH is obtained by equally dividing the maximum transmission power of the first terminal device according to the value of X; or the transmission power of the first PSFCH is determined according to at least one of the priority of at least one PSFCH to be transmitted, the maximum transmission number of PSFCH, and the maximum transmission power of the first terminal device, where at least one PSFCH includes X PSFCH.

The division of the modules in the embodiments of the present application is schematically only one logic function division, and there may be another division manner in actual implementation, and in addition, each functional module in each embodiment of the present application may be integrated in one processor, or may exist separately and physically, or two or more modules may be integrated in one module. The integrated modules may be implemented in hardware or in software functional modules. It will be appreciated that the function or implementation of each module in the embodiments of the present application may further refer to the relevant description of the method embodiments.

In a possible manner, the communication apparatus may be a communication device or a chip in a communication device, where the communication device may be the first terminal device in the above embodiment or the second terminal device in the above embodiment, as shown in fig. 11. The apparatus comprises a processor 1101 and a communication interface 1102, and may also comprise a memory 1103. Wherein the processing module 1002 may be the processor 1101. The communications module 1001 may be a communications interface 1102.

The processor 1101 may be a CPU, or a digital processing unit, or the like. The communication interface 1102 may be a transceiver, or may be an interface circuit such as a transceiver circuit, or may be a transceiver chip, or the like. The apparatus further comprises: a memory 1103 for storing a program executed by the processor 1101. The memory 1103 may be a nonvolatile memory such as a hard disk (HARD DISK DRIVE, HDD) or a Solid State Disk (SSD), or may be a volatile memory (RAM) such as a random-access memory (RAM). The memory 1103 is any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer, but is not limited thereto.

The processor 1101 is configured to execute program codes stored in the memory 1103, and specifically configured to execute the actions of the processing module 1002, which are not described herein. The communication interface 1102 is specifically configured to perform the actions of the above-mentioned communication module 1001, which is not described herein.

Optionally, the communication device may further include a bus 1104 connection, where the bus 1104 is connected to connect the communication interface 1102, the processor 1101 and the memory 1103.

The specific connection medium between the communication interface 1102, the processor 1101, and the memory 1103 is not limited to the above embodiments of the present application. In the embodiment of the present application, the memory 1103, the processor 1101 and the communication interface 1102 are connected by a bus 1104 in fig. 11, where the bus is indicated by a thick line in fig. 11, and the connection manner between other components is only schematically illustrated, and is not limited thereto. The buses may be divided into address buses, data buses, control buses, etc. For ease of illustration, only one thick line is shown in FIG. 11, but not only one bus or one type of bus.

The embodiment of the invention also provides a computer readable storage medium for storing computer software instructions required to be executed by the processor, and the computer readable storage medium contains a program required to be executed by the processor.

The embodiment of the application also provides a communication system, which comprises a communication device for realizing the function of the first terminal equipment in the embodiment shown in fig. 2 and a communication device for realizing the functions of other terminal equipment in the embodiment shown in fig. 2.

The embodiment of the application also provides a communication system, which comprises a communication device for realizing the function of the first terminal equipment in the embodiment shown in fig. 7 and a communication device for realizing the functions of other terminal equipment in the embodiment shown in fig. 7.

It will be appreciated by those skilled in the art that embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.

The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to the application. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

It will be apparent to those skilled in the art that various modifications and variations can be made to the present application without departing from the spirit or scope of the application. Thus, it is intended that the present application also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.

Claims

1. A method of sidestream communication, the method comprising:

Receiving X side line data, wherein X is an integer greater than or equal to 1;

transmitting X physical layer side uplink feedback channels PSFCH corresponding to the X side row data;

Wherein, the transmission of the first PSFCH of the X PSFCH occupies a first PRB set and a second PRB set corresponding to the first PSFCH;

The first PRB set comprises N PRBs, the N PRBs are public PRBs, the second PRB set comprises m PRBs, N is an integer greater than 1, and m is an integer greater than or equal to 1;

The first PSFCH has a transmit power on any PRB of the first PRB set that is less than or equal to a transmit power on any PRB of the second PRB set.

2. The method of claim 1, wherein the transmission power of the first PSFCH on any one of the first set of PRBs and the second set of PRBs is obtained by equally dividing the transmission power of the first PSFCH according to a total number of PRBs included in the first set of PRBs and the second set of PRBs.

3. The method of claim 1, wherein the first PSFCH total transmit power over the first set of PRBs and the total transmit power over the second set of PRBs are determined based on the transmit power of the first PSFCH and an adjustment factor.

4. The method of claim 3, wherein the first PSFCH is a total transmit power over the first set of PRBsThe following formula is satisfied:

the first PSFCH has total transmit power over the second set of PRBs The following formula is satisfied:

5. The method of claim 3, wherein the first PSFCH is a total transmit power over the first set of PRBsThe following formula is satisfied:

Wherein P ¹ is the transmission power of the first PSFCH, and β1 is the adjustment factor.

6. The method of claim 3, wherein the first PSFCH is a total transmit power over the first set of PRBsThe following formula is satisfied:

Wherein P ¹ is the transmission power of the first PSFCH, and β2 is the adjustment factor.

7. The method of any of claims 1-6, wherein the first set of PRBs comprises all or part of one interleaved resource block.

8. The method of any of claims 1-7, wherein a second PSFCH of the X PSFCH occupies the first set of PRBs and a second set of PRBs corresponding to the second PSFCH.

9. The method of claim 8, wherein the transmit power of the first PSFCH is to be

Or the transmission power of the first PSFCH is determined according to at least one of the priority of at least one PSFCH to be transmitted, the maximum transmission number of PSFCH, and the maximum transmission power of the terminal device, where the at least one PSFCH includes the X PSFCH.

10. The method of any of claims 1-7, wherein a transmission of a second PSFCH of the X PSFCH occupies the second set of PRBs corresponding to the second PSFCH.

11. The method of claim 10, wherein the first PSFCH transmit power is determined based on a maximum transmit power of a terminal device, a total number of PRBs occupied by the X PSFCH, and a number of PRBs occupied by the first PSFCH.

12. The method of claim 11, wherein the transmit power P ¹ of the first PSFCH satisfies the following formula:

Wherein, P _{Total (S)} is the maximum transmission power of the terminal device.

13. The method of any one of claims 10-12, wherein the first PSFCH is the lowest priority PSFCH of the X PSFCH.

14. A method of sidestream communication, the method comprising:

determining resources occupied by transmission of a first physical layer side uplink feedback channel PSFCH, wherein the resources occupied by the transmission of the first PSFCH comprise a first Physical Resource Block (PRB) set and a second PRB set corresponding to the first PSFCH;

receiving the first PSFCH on the second set of PRBs;

the first PRB set comprises N PRBs, the N PRBs are public PRBs, the second PRB set comprises m PRBs, the N is an integer greater than 1, and the m is an integer greater than or equal to 1.

15. A method of sidestream communication, the method comprising:

Receiving X side line data, wherein X is an integer greater than or equal to 1;

transmitting Y physical layer side uplink feedback channels PSFCH, the Y being an integer greater than or equal to X;

wherein the transmission of the first PSFCH of the Y PSFCH occupies a first set of physical resource blocks PRB,

The transmission of the second PSFCH in the Y PSFCH occupies a second PRB set corresponding to the second PSFCH;

The first PRB set includes N PRBs, where the N PRBs are public PRBs; the second set of PRBs includes m PRBs; and N is an integer greater than 1, and m is an integer greater than or equal to 1.

16. The method of claim 15 wherein the Y PSFCH are the X PSFCH corresponding to the X sidestream data, and the first PSFCH is the PSFCH lowest priority of the X PSFCH.

17. The method of claim 15, wherein Y = x+1, the Y PSFCH comprising X PSFCH corresponding to the X sidestream data and one preconfigured or predefined PSFCH, the first PSFCH being preconfigured or predefined PSFCH.

18. The method of any of claims 15-17, wherein the transmission power of the first PSFCH on any PRB of the first set of PRBs is obtained by equally dividing the transmission power of the first PSFCH according to a total number of PRBs included in the first set of PRBs.

19. The method of any of claims 15-18, wherein the transmission power of the second PSFCH on any PRB of the second PRB set is obtained by equally dividing the transmission power of the second PSFCH according to a total number of PRBs included in the second PRB set.

20. The method of any of claims 15-19, wherein the first set of PRBs comprises all or part of PRBs in one or more interleaved resource blocks.

21. The method according to any one of claims 15-20, wherein the transmission power of the first PSFCH is obtained by equally dividing the maximum transmission power of the terminal device according to the value of X;

22. A method of sidestream communication, the method comprising:

Determining resources occupied by transmission of a first physical layer side uplink feedback channel PSFCH, wherein the resources occupied by the transmission of the first PSFCH are a first Physical Resource Block (PRB) set;

Receiving the first PSFCH on the first set of PRBs;

The first PRB set includes N PRBs, where the N PRBs are public PRBs; and N is an integer greater than 1.

23. A communication device, characterized in that it comprises means for implementing the method according to any of claims 1-13; or the apparatus comprises means for implementing the method of claim 14; or the apparatus comprises means for implementing the method of any one of claims 15-21; or the apparatus comprises means for implementing the method of claim 22.

24. A communication device, comprising:

a memory for storing instructions;

A processor for invoking and executing the instructions from the memory to cause the communication device to perform the method of any of claims 1-13; or performing the method of claim 14; or performing the method of any one of claims 15-21; or perform the method of claim 22.

25. A computer readable storage medium having instructions stored therein which, when invoked for execution on a computer, cause the computer to perform the method of any one of claims 1-13; or performing the method of claim 14; or performing the method of any one of claims 15-21; or perform the method of claim 22.

26. A computer program product, characterized in that the computer program product, when run on a computer, causes the computer to perform the method according to any of claims 1-13; or performing the method of claim 14; or performing the method of any one of claims 15-21; or perform the method of claim 22.