CN117730548A

CN117730548A - Information feedback method, device, equipment and storage medium

Info

Publication number: CN117730548A
Application number: CN202180100934.0A
Authority: CN
Inventors: 赵振山; 张博源
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2021-11-25
Filing date: 2021-11-25
Publication date: 2024-03-19
Also published as: WO2023092418A1

Abstract

The embodiment of the application provides an information feedback method, device, equipment and storage medium, when a first terminal device receives a sidestream reference signal on a plurality of carriers, after sidestream measurement results of the plurality of carriers are obtained according to the sidestream reference signal, one or more target carriers for feeding back the sidestream measurement results of the plurality of carriers can be determined, and feedback or reporting is performed on the one or more target carriers. The technical scheme provides an implementation scheme for feeding back or reporting the multi-carrier side-row measurement result by the receiving terminal in the side-row multi-carrier system, which can improve the utilization rate of system resources, reduce the influence of half duplex or improve the success rate of the feedback of the side-row measurement result.

Description

Information feedback method, device, equipment and storage medium

Technical Field

The embodiment of the application relates to the technical field of communication, in particular to an information feedback method, an information feedback device, information feedback equipment and a storage medium.

Background

With the development of network technology and intelligent terminal technology, the internet of vehicles is receiving more and more attention. The internet of vehicles system is formed based on a Side Link (SL) transmission technology of a device to device (D2D), and adopts a terminal to terminal direct communication mode, so that the system has higher spectral efficiency and lower transmission delay.

In the prior art, in a scenario with a high requirement on communication reliability, for example, a new air interface internet of vehicles (NR-V2X) supports feedback (or CSI reporting) of sidestream channel state information (channel state information, CSI). Specifically, in the unicast transmission mode, the transmitting end terminal transmits a CSI reference signal (CSI-RS) of the side link, and the receiving end terminal measures and acquires CSI according to the received CSI-RS and feeds back the CSI to the transmitting end terminal so as to assist the transmitting end terminal in adjusting transmission parameters.

However, in order to improve throughput of the sidestream multi-carrier transmission system, sidestream multi-carrier transmission is introduced in the internet of vehicles system, at this time, the transmitting end terminal may transmit data on multiple carriers, for example, when the transmitting end terminal transmits the SL CSI-RS to the receiving end through multiple carriers, how the receiving end terminal feeds back the CSI obtained from the multiple carriers to the transmitting end terminal is a problem to be solved.

Disclosure of Invention

The embodiment of the application provides an information feedback method, an information feedback device, information feedback equipment and a storage medium, which are used for providing an implementation scheme for feeding back or reporting a multi-carrier sidestream measurement result by a receiving terminal in a sidestream multi-carrier system.

In a first aspect, the present application provides an information feedback method, applied to a first terminal device, where the method includes:

Receiving side line reference signals on M carriers, wherein M is an integer greater than or equal to 2;

acquiring side line measurement results of the M carriers according to the side line reference signals;

determining Q target carriers, wherein Q is a positive integer;

and feeding back side-row measurement results of the M carriers on the Q target carriers.

In a second aspect, the present application provides an information feedback apparatus, applied to a first terminal device, where the apparatus includes:

the receiving module is used for receiving the side line reference signals on M carriers, wherein M is an integer greater than or equal to 2;

the processing module is used for acquiring side line measurement results of the M carriers according to the side line reference signals;

the determining module is used for determining Q target carriers, wherein Q is a positive integer;

and the sending module is used for feeding back the side-row measurement results of the M carriers on the Q target carriers.

In a third aspect, an embodiment of the present application provides a terminal device, including: a processor, a memory, a transceiver, and a system bus;

the memory is used for storing computer execution instructions;

the processor is configured to obtain computer instructions from the memory and execute the computer instructions to implement the method according to the first aspect.

Alternatively, the processor may be a chip.

In a fourth aspect, embodiments of the present application may provide a computer readable storage medium having stored therein computer instructions which, when executed by a processor, are adapted to carry out the method of the first aspect.

In a fifth aspect, embodiments of the present application provide a computer program for performing the method of the first aspect when the computer program is executed by a processor.

In a sixth aspect, embodiments of the present application provide a computer program product comprising a computer program for implementing the method according to the first aspect when the computer program is executed by a processor.

In a seventh aspect, embodiments of the present application provide a chip, including: a processing module and a communication interface, the processing module being capable of performing the method of the first aspect.

Further, the chip further comprises a memory module (e.g. a memory), the memory module is configured to store instructions, the processing module is configured to execute the instructions stored in the memory module, and execution of the instructions stored in the memory module causes the processing module to perform the method according to the first aspect.

An eighth aspect of the present application provides a communication system, comprising: a first terminal device and a second terminal device;

The first terminal device is the information feedback device described in the second aspect;

optionally, the communication system may further include: the network device is used for providing services for the first terminal device and/or the second terminal device.

According to the information feedback method, device, equipment and storage medium provided by the embodiment of the application, when the first terminal equipment receives the sidestream reference signals on the plurality of carriers, after sidestream measurement results of the plurality of carriers are obtained according to the sidestream reference signals, one or more target carriers for feeding back the sidestream measurement results of the plurality of carriers can be determined, and feedback or reporting is performed on the one or more target carriers. The technical scheme provides an implementation scheme for feeding back or reporting the multi-carrier side-row measurement result by the receiving terminal in the side-row multi-carrier system, which can improve the utilization rate of system resources, reduce the influence of half duplex or improve the success rate of the feedback of the side-row measurement result.

Drawings

FIG. 1 is a schematic diagram of a V2X communication architecture;

FIG. 2 is a system architecture diagram of sidestream communications within a network overlay;

FIG. 3 is a system architecture diagram of partial network coverage sidestream communications;

FIG. 4 is a system architecture diagram of sidestream communications outside of the network coverage;

Fig. 5 is a schematic diagram of a unicast transmission manner between terminals;

fig. 6 is a schematic diagram of a multicast transmission mode between terminals;

fig. 7 is a schematic diagram of a broadcast transmission manner between terminals;

fig. 8 is a schematic flow chart of a first embodiment of an information feedback method provided in the present application;

fig. 9 is a schematic flow chart of a second embodiment of an information feedback method provided in the present application;

fig. 10 is a schematic diagram of receiving SL CSI on M carriers and feeding back the M CSI on 1 carrier;

fig. 11 is a schematic diagram of receiving SL CSI on M carriers and feeding back M CSI on M carriers, respectively;

fig. 12 is a first structural diagram of information corresponding to each carrier in the MAC CE in the embodiment of the present application;

fig. 13 is a second structural diagram of information corresponding to each carrier in the MAC CE according to the embodiment of the present application;

fig. 14 is a third structural diagram of information corresponding to each carrier in the MAC CE according to the embodiment of the present application;

fig. 15 is a fourth structural diagram of information corresponding to each carrier in the MAC CE in the embodiment of the present application;

fig. 16 is a fifth structural diagram of information corresponding to each carrier in the MAC CE according to the embodiment of the present application;

fig. 17 is a sixth structural diagram of information corresponding to each carrier in the MAC CE according to the embodiment of the present application;

Fig. 18 is a schematic flow chart of a third embodiment of an information feedback method provided in the present application;

FIG. 19 is a schematic diagram of an embodiment of an information feedback device provided in the present application;

fig. 20 is a schematic structural diagram of an embodiment of a terminal device provided in the present application;

fig. 21 is a schematic structural diagram of an embodiment of a communication system provided in the present application.

Detailed Description

For the purposes of making the objects, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.

The terms first, second and the like in the description of embodiments of the present application, in the claims and in the above-described figures, are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the present application described herein may be implemented in other sequences than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

With the development of network technology and intelligent vehicle technology, the internet of vehicles is receiving more and more attention. The vehicle networking system is a side-link transmission technology based on D2D, is mainly researched aiming at the scene of vehicle-to-vehicle communication, is mainly oriented to the traffic of vehicle-to-vehicle and vehicle-to-person communication which move at a relatively high speed, is different from the traditional mode that communication data is received or sent through a base station in an LTE system, adopts a terminal-to-terminal direct communication mode, and has higher frequency spectrum efficiency and lower transmission delay.

Currently, in a vehicle networking system, a vehicle networking terminal realizes interaction of a vehicle and X (vehicle, person, traffic road side infrastructure and network) intelligent information through a vehicle-to-evaluation technology (V2X). The interaction modes of V2X communication include: communication between vehicles (vehicle to vehicle, V2V), between vehicles and roadside infrastructure (vehicle to infrastructure, V2I), between vehicles and pedestrians (vehicle to pedestrian, V2P), between vehicles and network (vehicle to network, V2N). Illustratively, the roadside infrastructure may be a Road Side Unit (RSU).

Fig. 1 is a schematic diagram of an architecture of V2X communication. As shown in fig. 1, V2X communication includes V2V communication, V2P communication, V2I communication, and V2N communication, and V2X traffic is transmitted through a sidelink (sidelink) or Uu port during V2X communication.

In practical application, V2X realizes typical application scenes such as information service, traffic safety, traffic efficiency and the like by virtue of omnibearing connection and efficient information interaction with people, vehicles, roads and cloud platforms. The internet of vehicles terminal can obtain various information services through V2I and V2N communication, including traffic signal lamp information, nearby area vehicle information, vehicle navigation, emergency rescue, information entertainment services and the like. The information such as the speed, the position, the driving condition and the pedestrian activity of surrounding vehicles can be obtained in real time through V2V and V2P communication, and the collision early warning function is realized through an intelligent algorithm, so that traffic accidents are avoided. The functions of guiding the vehicle speed and the like can be realized through V2I communication, and the traffic efficiency is improved.

With the continued development of technology, new wireless (NR) communication systems are currently being introduced, in which V2X is referred to as NR-V2X. In the NR-V2X system, automatic driving needs to be supported, and thus, higher requirements are put on data interaction between vehicle terminals, such as higher throughput, lower latency, higher reliability, larger coverage, more flexible resource allocation, and the like.

In the NR-V2X system, communication through the side-link is called side-link communication. Optionally, the sidestream communications in different network coverage environments are different. Specifically, in the sidestream communication, the sidestream communication in the network coverage, the sidestream communication in the partial network coverage, and the sidestream communication outside the network coverage can be classified according to the network coverage condition of the terminal device for communication.

As an example, fig. 2 is a system architecture diagram of sidestream communications within a network overlay. As shown in fig. 2, in the sidestream communication within the network coverage, all terminals performing sidestream communication (for example, the first terminal device and the second terminal device in fig. 2) are within the coverage of the same network device (base station), and thus, all the terminals may receive the configuration instruction of the network device and perform sidestream communication based on the same sidestream configuration information.

As another example, fig. 3 is a system architecture diagram of partial network coverage sidestream communications. As shown in fig. 3, in the case of the sidestream communication of the partial network coverage, only a partial terminal performing sidestream communication is located within the coverage of the network device (base station), and this partial terminal can receive the configuration signaling of the network device and perform sidestream communication according to the configuration signaling.

It will be appreciated that in this example, the terminal outside the network coverage area cannot receive the configuration signaling of the base station, and at this time, the terminal outside the network coverage area will determine the sidestream configuration information according to the pre-configuration information and the information carried in the physical sidestream broadcast channel (physical sidelink broadcast channel, PSBCH) received from the terminal inside the network coverage area, and then perform sidestream communication based on the sidestream configuration information.

For example, in the system shown in fig. 3, the first terminal device is located within the coverage area of the network device, and the second terminal device is located outside the network coverage area, so that the first terminal device may perform sidestream communication with the second terminal device based on the configuration instruction received from the network device, and the second terminal device determines sidestream configuration information according to the pre-configuration information and information carried in the PSBCH received from the first terminal device, and then performs sidestream communication with the first terminal device based on the sidestream configuration information.

As yet another example, fig. 4 is a system architecture diagram of side-by-side communications outside of network coverage. As shown in fig. 4, in the network coverage outside line communication, all terminals (first terminal device and second terminal device) performing the outside line communication are located outside the network coverage, and at this time, all terminals (first terminal device and second terminal device) determine the outside line configuration information according to the pre-configuration information, and then perform the outside line communication based on the outside line configuration information.

Optionally, in the system shown in fig. 2 to fig. 4, the first terminal device and the second terminal device are terminal devices with V2X communication capability, and are configured to perform V2X communication, where V2X communication is performed between the first terminal device and the second terminal device through a wireless communication interface, and communication is performed between the first terminal device and the network device, or between the second terminal device and the network device through a wireless communication interface. For clarity, the wireless communication interface between the first terminal device and the second terminal device is referred to as a first air interface, for example, a sidelink, and the wireless communication interface between the first terminal device and the network device or between the second terminal device and the network device is referred to as a second air interface, for example, a Uu interface.

Optionally, the internet of vehicles system adopts a terminal-to-terminal direct communication mode. Specifically, two transmission modes are defined in 3 GPP: a first mode and a second mode.

First mode: the transmission resources of the terminal equipment are distributed by the network equipment (base station), and the terminal equipment transmits data on the side links according to the resources distributed by the network equipment; the network device may allocate resources for single transmission to the terminal device, or may allocate resources for semi-static transmission to the terminal device, which will not be described herein. In the system shown in fig. 2, the first terminal device and the second terminal device are both located in the network coverage area, and the network device allocates transmission resources used for side transmission to each terminal device.

Second mode: the terminal equipment selects one resource from the resource pool to transmit data. In the system shown in fig. 2, the first terminal device and the second terminal device may autonomously select transmission resources from a resource pool configured by the network to perform side transmission; in the system shown in fig. 3, the first terminal device and the second terminal device may select transmission resources from the resource pool in a listening manner, or select transmission resources from the resource pool in a random selection manner; in the system shown in fig. 4, the first terminal device and the second terminal device adopt the second mode to transmit outside the network coverage, and at this time, transmission resources can be selected from a preconfigured resource pool for side transmission, where the resource pool is obtained by a preconfigured mode. The manner in which the first terminal device and the second terminal device select the transmission resource may be determined according to the actual situation, which is not described herein.

Optionally, the LTE-V2X supports a broadcast transmission mode, and the NR-V2X may support both a broadcast transmission mode and a unicast and multicast transmission mode.

Fig. 5 is a schematic diagram illustrating a unicast transmission manner between terminals. For the unicast transmission mode, each transmitting terminal corresponds to only one receiving terminal. As in fig. 5, unicast transmission is performed between the first terminal device and the second terminal device.

Optionally, fig. 6 is a schematic diagram of a multicast transmission manner between terminals. For the multicast transmission mode, each transmitting terminal may correspond to all terminals in a communication group or all terminals within a certain transmission distance. As shown in fig. 6, the first terminal device, the second terminal device, the third terminal device, and the fourth terminal device constitute one communication group. When the first terminal device is used as a transmitting terminal to transmit data, other terminal devices (second terminal device, third terminal device and fourth terminal device) in the communication group are all receiving terminal devices.

Optionally, fig. 7 is a schematic diagram of a broadcast transmission manner between terminals. For the broadcast transmission mode, the receiving terminal corresponding to each transmitting terminal may be any terminal around the transmitting terminal. As shown in fig. 7, if the first terminal device is a transmitting terminal, other terminals (second terminal device, third terminal device, fourth terminal device, fifth terminal device, sixth terminal device) around the first terminal device may be receiving terminal.

At present, in order to better support unicast communication, the NR-V2X supports feedback (or CSI reporting) of the sidelink channel state information (channel state information, CSI), the transmitting end terminal transmits a reference signal (SL CSI-RS) of the sidelink channel state information, the receiving end terminal performs channel measurement according to the CSI-RS transmitted by the transmitting end terminal, acquires CSI, and feeds back (or reports) the CSI to the transmitting end terminal, so as to assist the transmitting end terminal to adjust transmission parameters, for example, adjust modulation and coding strategies (modulation and coding scheme, MCS), and the like.

In practical application, the transmitting terminal transmits the SL CSI-RS only when the following 3 conditions are satisfied:

1. the transmitting terminal transmits the corresponding physical side uplink shared channel (physical sidelink shared channel, PSSCH):

that is, only when the transmitting terminal transmits the PSSCH, the SL CSI-RS can be simultaneously transmitted, and the transmitting terminal cannot transmit only the SL CSI-RS;

2. the high layer signaling activates the sidelink CSI reporting:

the radio resource control (radio resource control, RRC) configuration parameters include a parameter SL-CSI-Acquisition-r16, and the transmitting terminal supports the transmission of SL-CSI-RS only when the parameter is configured as an enable;

3. Under the condition that the high-layer signaling activates the side CSI reporting, the corresponding bit in the second-order SCI sent by the sending terminal triggers the side CSI reporting;

specifically, the second-order SCI (e.g., SCI format 2-a or SCI format 2-B) includes an information field "CSI request", and when the information field indicates CSI reporting, the transmitting terminal transmits the SL CSI-RS.

In addition, the NR-V2X R version supports the feedback of CSI from the receiving end terminal to the transmitting end terminal in a unicast scenario, and since no complex multi-antenna technology is introduced, only the feedback of channel quality indication (channel quality indicator, CQI)/Rank Indication (RI) is supported, and the feedback of precoding matrix indication (precoding matrix indicator, PMI) is not supported.

Meanwhile, when the receiving terminal feeds back CQI/RI, the receiving terminal requires that CQI (4-bit information) and RI (1-bit information) are bound together and fed back to the transmitting terminal. In R16, since the sidelink physical feedback channel (physical sidelink feedback channel, PSFCH) is only used for hybrid automatic repeat request (hybrid automatic repeat request, HARQ) information feedback, CQI/RI information feedback is only transmitted through the traffic channel (PSSCH) and is carried in the Control Element (CE) of the medium access layer (Medium Access Control, MAC).

The CQI fed back by the receiving end terminal is a wideband CQI, i.e., a CQI corresponding to the bandwidth occupied by the PSSCH, and each codeword (codeword) corresponds to one wideband CQI feedback. In addition, the transmitting terminal indicates a delay boundary to the receiving terminal through a radio resource control (PC 5-RRC) signaling between direct communication interfaces, specifically, a PC5-RRC instruction sent by the transmitting terminal to the receiving terminal carries a parameter SL-LatencyBoundCSI-Report, so that the receiving terminal can determine the delay boundary according to the parameter SL-LatencyBoundCSI-Report, and correspondingly, when the receiving terminal detects SL CSI, the receiving terminal needs to feed back the CSI to the transmitting terminal in a time interval corresponding to the delay boundary.

Further, to improve throughput of the sidelink transmission system, multicarrier transmission may be supported on the sidelink link. In the Rel-15 internet of vehicles system, a multi-carrier transmission scheme is introduced, and data of terminal equipment can be transmitted on one or more carriers, so that the problem of transmission carrier selection exists. One common way is to select the carrier with the lowest CBR for data transmission by the terminal device according to the channel occupancy (channel busy ratio, CBR) of each carrier.

It can be appreciated that CBR reflects channel occupancy over a period of time in the past (e.g., 100 ms), with lower CBR indicating lower system resource occupancy, more available resources; the higher CBR means that the higher the system resource occupancy, the more congested, the more likely transmission collisions and interference will occur.

As can be seen from the above analysis, in the internet of vehicles system, when the multi-carrier transmission scheme is introduced, the transmitting end terminal may perform information transmission on multiple carriers, for example, when the transmitting end is satisfying the condition of transmitting the SL CSI-RS, if the transmitting end terminal transmits the SL CSI-RS to the receiving end terminal through multiple carriers, that is, the receiving end terminal receives the SL CSI-RS on multiple carriers and obtains CSI of the multiple carriers, how the receiving end terminal feeds back CSI obtained by multiple carriers to the transmitting end terminal is a problem to be solved.

Aiming at the problems, the technical conception process of the application is as follows: the inventor of the application finds that the receiving terminal can feed back or report the CSI on a plurality of carriers or a plurality of PSSCH channels respectively, so that the aim of reporting a plurality of CSI can be fulfilled, but the problems of resource waste, low transmission efficiency and low transmission success rate possibly exist in the mode, and if the CSI of a plurality of carriers are fed back on one carrier and fed back on one PSSCH, the feedback resource can be saved, the utilization rate of the system resource can be improved, and the influence of half duplex can be reduced. In addition, the receiving terminal can feed back or report the CSI on a plurality of carriers, and feed back or report a plurality of CSI on each carrier, so that the success rate of CSI feedback can be improved.

Based on the above technical conception process, the embodiment of the present application provides an information feedback method, when a first terminal device receives a sidestream reference signal on M carriers, M is an integer greater than or equal to 2, which may first obtain sidestream measurement results of the M carriers according to the sidestream reference signal, and then determine Q target carriers, where Q is a positive integer, and finally feedback the sidestream measurement results of the M carriers on the Q target carriers. In the technical scheme, the side-line measurement results of the M carriers are fed back on the Q carriers, so that the utilization rate of system resources can be improved, the influence of half duplex is reduced, or the success rate of feedback of the side-line measurement results is improved.

It can be appreciated that the information feedback method provided in the embodiments of the present application may be used in an internet of vehicles system, may also be used in any D2D system or side transmission system, and may also be applied to a third generation mobile communication (the 3rd generation mobile communication,3G), a long term evolution (long term evolution, LTE) system, a fourth generation mobile communication (the 4th generation mobile communication,4G) system, a long term evolution advanced system (advanced long term evolution, LTE-a), a third generation partnership project (the 3rd generation partnership project,3GPP) related cellular system, a fifth generation mobile communication (the 5th generation mobile communication,5G) system, and a subsequent evolution communication system. The embodiments of the present application are not limited thereto.

The network device involved in the embodiments of the present application may be a general base station (such as a NodeB or eNB or gNB), a new radio controller (new radio controller, NR controller), a centralized network element (centralized unit), a new radio base station, a remote radio module, a micro base station, a relay, a distributed network element (distributed unit), a receiving point (transmission reception point, TRP), a transmission point (transmission point, TP), or any other device, but the embodiments of the present application are not limited thereto.

The terminal device, such as the first terminal device or the second terminal device, in this embodiment of the present application is a terminal device with a sidestream communication capability, and is a device that provides voice and/or data connectivity to a user, for example, a handheld device with a wireless connection function, an on-board device, a roadside unit, and so on. Common terminal devices include: a cell phone, tablet, notebook, palm top, mobile internet device (mobile internet device, MID), wearable device, such as a smart watch, smart bracelet, pedometer, etc.

The following describes the technical scheme of the present application in detail through specific embodiments. It should be noted that the following embodiments may be combined with each other, and the same or similar concepts or processes may not be described in detail in some embodiments.

Fig. 8 is a flowchart of an embodiment of an information feedback method provided in the present application. The method can be applied to any one of communication equipment in the Internet of vehicles system, for example, in the embodiment of the application, the information feedback method is applied to first terminal equipment for explanation, and the first terminal equipment communicates with other terminal equipment through a side uplink.

As shown in fig. 8, the information feedback method may include the steps of:

s801, receiving side line reference signals on M carriers, wherein M is an integer greater than or equal to 2.

In this embodiment, the terminal devices may perform sidestream communication on multiple carriers. The embodiments of the present application are illustratively explained in terms of multi-carrier side communication between a first terminal device and a second terminal device. The second terminal device is a terminal device transmitting the sidestream reference signal, and the first terminal device is a terminal device receiving the sidestream reference signal.

It should be noted that, in the embodiment of the present application, the first terminal device and the second terminal device are only for distinguishing the sender and the receiver of the sending side line reference signal, and do not represent a sequence and a precedence relationship.

Optionally, feedback of the sidelink measurement result (or referred to as reporting of the sidelink measurement result) is supported in the sidelink communication system, that is, the second terminal device may send the sidelink reference signal to the first terminal device on a plurality of carriers under a certain condition, and correspondingly, the first terminal device may receive the sidelink reference signal on the plurality of carriers. Alternatively, in the embodiment of the present application, it is assumed that the second terminal device may send the sidelink reference signals to the first terminal device on M carriers or more, respectively, and the first terminal device receives the sidelink reference signals on M carriers.

It can be understood that the embodiments of the present application are mainly used for solving the problem of information feedback during multicarrier transmission, and thus, in the embodiments of the present application, M is an integer greater than or equal to 2.

It should be noted that, in the embodiment of the present application, the first terminal device and the second terminal device are only for distinguishing the sender and the receiver of the sending side line data information, and do not represent a sequence and a precedence relationship.

Optionally, in an embodiment of the present application, the side reference signal is any one of the following information:

sidestream channel state information reference signals (Sidelink channel state information reference signal, SL CSI-RS), physical sidestream shared channel demodulation reference signals (physical sidelink shared channel demodulation reference signal, PSSCH DMRS), physical sidestream control channel demodulation reference signals (physical sidelink control channel demodulation reference signal, PSCCH DMRS).

The SL CSI-RS is used for indicating measurement and CSI feedback of the sidestream CSI, and PSSCH DMRS and PSCCH DMRS are used for indicating measurement and feedback of sidestream reference signal received power (Sidelink Reference Signal Received Power, S-RSRP).

Optionally, in the embodiment of the present application, the side reference signals on the M carriers may or may not be sent simultaneously, which is not limited in this application.

Optionally, the second terminal device sends the sidelink reference signal on each of the M carriers.

Optionally, the second terminal device sends at least one sidestream reference signal on each of the M carriers, where the at least one sidestream reference signal includes, for example, at least one of the following: SL CSI-RS, PSSCH-DMRS, PSCCH-DMRS. The SL CSI-RS is used for measuring CSI by the first terminal equipment, and the PSSCH-DMRS and the PSCCH-DMRS are used for measuring sidestream RSRP by the first terminal equipment.

S802, acquiring side line measurement results of M carriers according to the side line reference signals.

Optionally, after receiving the sidelink reference signals on the M carriers, the first terminal device may measure on the M carriers based on the sidelink reference signals, so as to obtain sidelink measurement results of the M carriers.

Optionally, the side-row measurement result of the M carriers includes at least one of the following information:

channel quality indication (channel quality indicator, CQI), rank Indication (RI), precoding matrix indication (precoding matrix indicator, PMI), or S-RSRP.

For example, when the sidelink reference signal is a SL CSI-RS, the first terminal device may measure on M carriers based on the SL CSI-RS, so as to obtain CSI on the M carriers. Alternatively, the CSI may include, but is not limited to including, one or more of the following: CQI, RI, PMI.

For example, when the sidelink reference signal is PSSCH DMRS or PSCCH DMRS, the first terminal device performs measurement on M carriers based on PSSCH DMRS or PSCCH DMRS, respectively, so as to obtain S-RSRP on M carriers.

S803, determining Q target carriers, wherein Q is a positive integer;

optionally, before the first terminal device feeds back or reports the acquired side measurement results of the M carriers, it needs to determine Q carriers occupied by feeding back or reporting the side measurement results of the M carriers.

As an example, the first terminal device may perform feedback or report of the side measurement results of the M carriers on one carrier among the multiple carriers supported by the side communication system, where the first terminal device needs to determine 1 target carrier.

As another example, the first terminal device may further perform feedback or report of the side measurement results of the M carriers on at least two carriers among the multiple carriers supported by the side communication system, where the first terminal device needs to determine at least two target carriers.

It may be understood that, in the embodiment of the present application, Q target carriers are Q carriers in the maximum carrier number N supported by the side communication system where the first terminal device is located, which may be Q carriers in M carriers of the above receiving side reference signal, or may not be Q carriers in M carriers or Q carriers in M carriers, and the embodiment of the present application does not limit a specific relationship between Q target carriers and M carriers, which may be determined according to actual situations, and will not be described herein.

It can be understood that in the embodiment of the present application, the manner in which the first terminal device determines Q target carriers is various, and the following description will exemplify taking the sidelink reference signal as SL CSI-RS and the sidelink measurement result as CSI. It should be appreciated that the following embodiments are equally applicable to cases where the sidestream reference signal is PSSCH DRMS or PSCCH DMRS and the sidestream measurement is S-RSRP.

In one possible design of the present application, S803, i.e., determining Q target carriers, may be implemented as follows:

according to the first information, Q target carriers are determined;

wherein the first information includes at least one of the following information:

a1, a carrier wave where a sidestream reference signal is located or a carrier wave which receives the sidestream reference signal;

for example, the first terminal device may determine Q target carriers according to a carrier on which the SL CSI-RS is located or a carrier on which the SL CSI-RS is received.

For example, if the first terminal device receives the SL CSI-RS on M carriers, the first terminal device may only select one carrier or Q carriers from the M carriers to perform feedback or reporting of CSI, but may not perform feedback or reporting of CSI on the carrier that does not receive the SL CSI-RS.

A2, priority information corresponding to PSSCH related to the sidestream reference signal;

alternatively, the first terminal device may determine Q target carriers according to priorities corresponding to PSSCH channels transmitted together with the SL CSI-RS.

Specifically, the second terminal device sends the SL CSI-RS and the PSSCH to the first terminal device, and accordingly, the first terminal device may receive the SL CSI-RS on M carriers, and at this time, the first terminal device may select a carrier feeding back or reporting CSI according to the priority of the PSSCH associated with the SL CSI-RS on the M carriers.

For example, the first terminal device may select Q carriers corresponding to the highest priority of the PSSCH, or select Q carriers corresponding to the lowest priority of the PSSCH. For example, when the number of target carriers is 1, the first terminal device may select the carrier corresponding to the highest priority of the PSSCH, or select the carrier corresponding to the lowest priority of the PSSCH. Wherein the priority of the PSSCH is determined based on priority indication information in side control information (sidelink control information, SCI) scheduling the PSSCH.

A3, channel occupancy rate;

for example, the first terminal device may measure CBR of each carrier, obtain CRB measurement results of each carrier, and further perform carrier selection according to the CBR measurement results of each carrier, for example, select Q carriers with the lowest CBR as target carriers for feeding back CSI.

Alternatively, the CBR measurement result may be a CBR measurement result corresponding to any one of the resource pools in the carrier, or the CBR measurement result may be a lowest CBR measurement result among the CBR measurement results corresponding to all the resource pools in the carrier.

A4, carrier index information;

for example, if the first terminal device detects the SL CSI-RS on M carriers, Q carriers corresponding to the lowest or highest carrier index in the M carriers are selected as carriers for feeding back or reporting CSI.

A5, indicating information of the second terminal equipment or indicating information of the first terminal equipment;

optionally, in the process that the second terminal device and the first terminal device perform the sidelink RRC connection establishment, the second terminal device sends indication information to the first terminal device, where the indication information is used to instruct the first terminal device to feed back or report carrier information used by CSI, and correspondingly, the first terminal device may determine Q target carriers for feeding back or reporting CSI according to the indication information of the second terminal device; or the first terminal equipment sends the indication information to the second terminal equipment, and the indication information is used for indicating the first terminal equipment to feed back or report the carrier information used by the CSI.

Optionally, when the second terminal device sends the SL CSI-RS to the first terminal device, the SCI associated with the SL CSI-RS carries indication information, which is used for indicating carrier information used when the first terminal performs CSI feedback. For example, carrier index information is carried in the SCI, and the first terminal device determines a corresponding carrier according to the carrier index information and feeds back CSI on the carrier.

Alternatively, the indication information of the second terminal device or the indication information of the first terminal device may be carried in SCI, MAC CE or PC5-RRC signaling, which is not limited in the embodiment of the present application.

A6, carrier information corresponding to the logic channel associated with the sidestream measurement result;

for example, since the sideline measurement result is associated with the logical channel, and the logical channel has a corresponding relationship or a mapping relationship with the carrier information, the first terminal device may determine Q target carriers for feedback or reporting of the sideline measurement result according to the carrier information corresponding to the logical channel associated with the sideline measurement result.

Optionally, table 1 is a table of correspondence between side CSI reporting information carried by the MAC CE and a logical channel. As shown in table 1, the logical channel identifier value corresponding to the side CSI reporting is 62, and further, according to the corresponding relationship between the logical channel and the carrier, carrier information corresponding to the logical channel carrying the side CSI reporting can be determined, so that Q target carriers for CSI feedback or reporting can be selected from the carriers corresponding to the logical channel associated with the CSI.

Table 1 side-channel CSI report information and logical channel corresponding relation table carried by MAC CE

A7, carrying carrier information corresponding to a logic channel associated with PSSCH channels of side line measurement results of M carriers;

optionally, since the sidelink measurement result is carried in the MAC CE or the PSSCH, where the MAC CE is also carried through the PSSCH, and a logical channel associated with sidelink data (e.g., service data) carried by the PSSCH channel itself has a corresponding carrier, Q target carriers for reporting or feeding back the sidelink measurement result may also be determined according to carrier information corresponding to the logical channel associated with the sidelink data carried by the PSSCH channel carrying the sidelink measurement result of M carriers.

A8, the carrier information which is selected by the first terminal equipment and used for transmitting the PSSCH;

for example, when the first terminal device has selected a carrier that is to transmit a PSSCH, and at this time, the first terminal device needs to feed back or report a sidestream measurement result, the first terminal device may directly carry the sidestream measurement result in the PSSCH to be transmitted, and feed back or report the sidestream measurement result on Q carriers that have been selected for transmitting the PSSCH.

Further, in the embodiment of the present application, when Q target carriers are determined, the value of Q may be determined according to the second information.

Wherein the second information includes at least one of the following information:

b1, priority information;

alternatively, the first terminal device may determine the number of carriers for feeding back the sidelink measurement result based on priority information corresponding to the PSSCH transmitted with the sidelink reference signal.

For example, when the first terminal device receives or detects M SL CSI-RS on M carriers, it may acquire M priority information of PSSCH associated with the M SL CSI-RS, and further determine the number of carriers for carrying CSI feedback information according to a relationship between a highest priority (or a lowest priority) and a first correspondence in the M priority information. The first correspondence represents a correspondence between priorities and the number of carriers. Optionally, the first correspondence is preconfigured or network configured.

For example, table 2 is an example of correspondence between priority information and the number of carriers carrying CSI feedback. For example, as shown in table 2, the number of carriers corresponding to priority 1 and priority 2 is 4, the number of carriers corresponding to priority 3 and priority 4 is 3, the number of carriers corresponding to priority 5 and priority 6 is 2, and the number of carriers corresponding to priority 7 and priority 8 is 1.

Table 2 example of correspondence between priority information and number of carriers carrying CSI feedback information

Priority value	1	2	3	4	5	6	7	8
Number of carriers Q	4	4	3	3	2	2	1	1

For example, the CSI to be fed back by the first terminal device corresponds to priority 1, and the number of carriers carrying CSI feedback information is determined to be 4 according to the correspondence between the priority 1 and the number of carriers Q.

B2, indicating information of the second terminal equipment or indicating information of the first terminal equipment;

as an example, in the process of establishing the sidelink RRC connection between the second terminal device and the first terminal device, the second terminal device (the transmitting end terminal) sends indication information to the first terminal device (the receiving end terminal) to indicate the number of carriers for the first terminal device to carry CSI feedback information, and correspondingly, the first terminal device may determine the number of carriers for feeding back or reporting CSI, that is, the size of Q, according to the indication information of the second terminal device; or the first terminal equipment sends indication information to the second terminal equipment, wherein the indication information is used for indicating the number of carriers used by the first terminal equipment for feeding back or reporting the CSI, namely the size of Q.

As another example, the SCI or MAC CE transmitted by the second terminal device to the first terminal device includes indication information for indicating the number of carriers carrying CSI feedback information.

As yet another example, the SCI or MAC CE transmitted by the first terminal device to the second terminal device includes indication information for indicating the number of carriers carrying CSI feedback information.

B3, configuration information sent by the network equipment;

optionally, in a scenario that the first terminal device and the second terminal device are in network coverage or network part coverage, when the network device sends configuration information to the first terminal device or the second terminal device, the first terminal device or the second terminal device may obtain, correspondingly, the configuration information sent by the network device from the network device, and determine, based on indication information included in the configuration information, the number of carriers carrying CSI feedback information, that is, the size of Q described above.

Alternatively, the configuration information may be a bandwidth part on side (BWP) configuration information, and the indication information in the BWP configuration information is used to indicate the number of carriers carrying CSI feedback.

Alternatively, the configuration information may be Resource Pool (RP) configuration information, where indication information in the RP configuration information is used to indicate the number of carriers carrying CSI feedback.

B4, pre-configuring information;

optionally, when the first terminal device and the second terminal device are both located outside the network coverage, the first terminal device may select transmission resources from the resource pool according to the preconfigured information, and determine the number of carriers used to carry CSI feedback information.

Alternatively, the pre-configuration information may be a bandwidth part on side (BWP) configuration information, and the indication information in the BWP configuration information is used to indicate the number of carriers carrying CSI feedback.

Alternatively, the pre-configuration information may be Resource Pool (RP) configuration information, where indication information in the RP configuration information is used to indicate the number of carriers carrying CSI feedback.

And B5, taking the value of M.

The first terminal device may also determine the number of carriers used to carry the sidelink measurement result based on the number of carriers of the receiving sidelink reference signal. For example, when the first terminal device receives the SL CSI-RS on M carriers, CSI may be fed back on the M carriers. That is, the first terminal device may determine the value of the number of carriers Q used for feeding back or carrying CSI according to the value of M.

It will be appreciated that the above manner of determining the Q value is merely illustrative and is not intended to be limiting in this application.

S804, feeding back the side measuring results of M carriers on the Q target carriers.

In the embodiment of the present application, when the first terminal device receives the sidestream reference signals on the M carriers and obtains the sidestream measurement results on the M carriers, the sidestream measurement results of the M carriers may be fed back or reported on the selected Q target carriers.

The side-row multi-carrier system where the first terminal device and the second terminal device are located supports N carriers, the first terminal device receives the SL CSI-RS sent by the second terminal device on M carriers of the N carriers, performs measurement based on the SL CSI-RS, obtains CSI of the M carriers, and further selects Q target carriers from the N carriers, and feeds back or reports CSI of the M carriers on each carrier of the Q target carriers.

It can be understood that when q=1, the first terminal device feeds back or reports CSI of M carriers on the selected one carrier; when q=m, the first terminal device feeds back or reports M CSI on M carriers, respectively, where each carrier feeds back or reports CSI of M carriers; in addition, Q may be any other value than 1 or M, and this embodiment is not limited thereto.

Alternatively, in the sidestream multi-carrier system, the first terminal device feeds back CSI of M carriers on Q target carriers, which may be interpreted as feeding back a sidestream measurement result of M carriers in each of the Q target carriers. Specifically, the MAC CE on each of the Q target carriers includes CSI corresponding to the M carriers.

From the above analysis, as an example, CSI of M carriers may be fed back on the same carrier; as another example, CSI for M carriers are carried in the same PSSCH or MAC CE.

Alternatively, the first terminal device may not detect the SL CSI-RS on the M carriers simultaneously, i.e., the SL CSI-RS on the M carriers may not be transmitted simultaneously. The embodiments of the present application are not limited thereto.

According to the information feedback method provided by the embodiment of the application, when the first terminal equipment receives the sidestream reference signals on M carriers, M is an integer greater than or equal to 2, sidestream measurement results of the M carriers are firstly obtained according to the sidestream reference signals, Q target carriers are then determined, wherein Q is a positive integer, and finally, the sidestream measurement results of the M carriers are fed back on the Q target carriers. In the technical scheme, the side-line measurement results of the M carriers are fed back on the Q carriers, so that the utilization rate of system resources can be improved, the influence of half duplex is reduced, or the success rate of CSI feedback is improved.

Fig. 9 is a schematic flow chart of a second embodiment of the information feedback method provided in the present application. As shown in fig. 9, the information feedback method may further include the steps of:

s901, determining a first time interval.

Optionally, the step S901 may be located before the step S804, that is, before feeding back the side measurement results of the M carriers on the determined Q target carriers, first determining a first time interval for feeding back the side measurement results, and then feeding back the side measurement results in the determined first time interval.

Illustratively, in one possible design of the present application, this S901 may be implemented by:

and C1, determining a second time interval of an mth carrier in M carriers, wherein M is a positive integer less than or equal to M.

The second time interval is determined according to delay boundary information fed back by a side line measurement result of an mth carrier in the M carriers.

Specifically, since the first terminal device detects the sidelink reference signals on the M carriers, in order to timely feed back or report the sidelink measurement results of the M carriers to the second terminal device, when determining the first time interval of the feedback of the sidelink measurement results of the M carriers, the second time interval of each carrier of the M carriers is first determined, and the explanation is given by using the mth carrier of the M carriers, where M is a positive integer less than or equal to M.

Optionally, the first terminal device determines a second time interval of an mth carrier in the M carriers, specifically:

the first terminal equipment firstly acquires time delay boundary information fed back by the side line measuring result of the mth carrier, and then determines a second time interval of the mth carrier according to the time delay boundary information fed back by the side line measuring result of the mth carrier and time slot information of the side line reference signal on the mth carrier.

For example, for an mth carrier (m=1, 2, … …, M) of the M carriers, the first terminal device may determine, according to the delay boundary information and the time slot information of the SL CSI-RS detected on the carrier, a second time interval corresponding to the CSI fed back on the mth carrier by the mth carrier.

The delay boundary information may be determined according to a parameter SL-latency bound si-Report in the PC5-RRC signaling, and specifically, the parameter SL-latency bound si-Report is used to indicate a delay boundary from a time slot in which the SL CSI-RS is received or a time slot in which the signaling indicating CSI reporting is received, where the parameter is expressed as the number of time slots.

For example, if the first terminal device detects the SL CSI-RS on the mth carrier in the time slot n, and the delay boundary determined according to the parameter SL-latencylboundsi-Report in the PC5-RRC signaling is 20 time slots, the first terminal device needs to feed back the CSI on the mth carrier before the time slot n+20.

Further, if the processing time of the first terminal device is T1, the time interval for feeding back CSI on the mth carrier is [ n+t1, n+20]. The processing time of the first terminal device may include, but is not limited to,: the time of detecting SCI, the time of obtaining CSI by measurement according to SL CSI-RS, the preparation time of PSSCH carrying CSI feedback information, and the like.

C2, determining the first time interval according to the overlapped part of M second time intervals of M carriers.

Optionally, the first time interval is determined according to M second time intervals of the M carriers. Illustratively, the first time interval is determined from overlapping portions of M second time intervals of the M carriers.

Optionally, the overlapping portion of the M second time intervals of the M carriers is greater than or equal to the first threshold value. Wherein the first threshold value is determined according to at least one of the following information:

indication information of the second terminal device or indication information of the first terminal device;

configuration information sent by the network equipment;

pre-configuration information.

Optionally, since the first terminal device needs to feed back or report the side measurement results of the M carriers on each of the Q carriers, it is first required to determine an overlapping portion of the M second time intervals of the M carriers, and ensure that the overlapping portion of the M second time intervals of the M carriers is greater than or equal to the first threshold value. That is, only when the overlapping part of the time intervals of the feedback CSI corresponding to each of the M carriers is greater than or equal to the first threshold, the CSI on the M carriers can be fed back on one carrier, and further, the CSI of the M carriers is carried in the same PSSCH or MAC CE.

Optionally, the resource pool configuration information or the side BWP configuration information includes indication information, where the indication information is used to indicate a first threshold, that is, a minimum value of overlapping portions of M second time intervals when side measurement results of M carriers are transmitted on the same carrier.

Optionally, in the process that the second terminal device and the first terminal device perform the side RRC connection establishment, the indication information sent by the second terminal device to the first terminal device or the indication information sent by the first terminal device to the second terminal device may be used to indicate the first threshold, that is, the minimum value of the overlapping portion of the M second time intervals when the side measurement results of the M carriers are sent on the same carrier.

Optionally, the first terminal device may further determine the first threshold according to priority information or other information.

For example, when the first terminal device receives or detects M SL CSI-RS on M carriers, it may acquire M priority information of PSSCH associated with the M SL CSI-RS, and further determine the first threshold according to a relationship between a highest priority (or a lowest priority) and a second correspondence in the M priority information. The second corresponding relation represents the corresponding relation between the priority and the first threshold value. Optionally, the second correspondence is preconfigured or network configured.

The CSI to be fed back by the first terminal device corresponds to a first priority, and the first threshold is determined according to the first priority.

In another possible design of the present application, this S901 (determining the first time interval) may be implemented by:

determining a first time interval according to at least one of the following information:

time delay boundary information fed back by the lateral measurement result;

the earliest time slot position in the time slots of the M sidelink reference signals;

the latest time slot position in the time slots where the M sidelink reference signals are located.

It should be understood that, when the second terminal device sends the sidestream reference signal, the second terminal device sends the indication information at the same time to instruct the first terminal device to perform sidestream feedback, that is, the sidestream reference signal and the indication information instructing the first terminal device to perform sidestream feedback are located in the same time slot, so that the time slot in which the M sidestream reference signals are located is also the time slot in which the indication information instructing the first terminal device to perform sidestream feedback is located. For example, when the second terminal device sends the SL CSI-RS, the second terminal device instructs the receiving end to perform side feedback in the "CSI request" information field in the SCI sent simultaneously with the SL CSI-RS, that is, the SL CSI-RS and the instruction information "CSI request" that instructs the receiving end to perform side feedback are located in the same timeslot.

Alternatively, the first terminal device may be based on M carriersAnd directly determining a first time interval by the time delay boundary information fed back by the side line measurement result, namely feeding back the CSI before the end position corresponding to the time interval with the earliest end position in the time intervals of the corresponding M pieces of fed back CSI on the M carriers. For example, the end positions of the time intervals of the feedback CSI on the M carriers respectively correspond to time slots t _m M=1, 2, … …, M, the minimum of the M end positions being t _k The first terminal device needs to be at t _k The CSI is fed back before the corresponding time domain position.

Optionally, in the sidelink multi-carrier system, when the second terminal device sends the SL CSI-RS, the instruction information indicates the first terminal device to perform sidelink feedback, so that the first terminal device may determine the first time interval according to the earliest time slot position in the time slots where the signaling information for indicating the first terminal device to perform sidelink feedback is located, and may determine the first time interval according to the latest time slot position in the time slots where the signaling information for indicating the first terminal device to perform sidelink feedback is located. For example, the time slots in which the signaling information indicating the first terminal device to perform the sidestream feedback is located correspond to time slot t respectively _m M=1, 2, … …, M, and the earliest slot of the M slots is at t _x X=1, 2, … …, M, the latest slot at t _y Y=1, 2, … …, M, and thus the first terminal device can be based on time slot t _x And time slot t _y Is determined for the first time interval.

Optionally, the first terminal device may further determine the first time interval according to time delay boundary information fed back by the side measurement results on the M carriers and a time slot where the side reference signals on the M carriers are located or a time slot where signaling information for instructing the first terminal device to perform side feedback is located. That is, according to the time slot where the sidestream reference signal on the M carriers is located or the time slot where the signaling information for instructing the first terminal device to perform sidestream feedback is located, and the time delay boundary information fed back by the sidestream measurement result on the M carriers, respectively determining M second time intervals on the M carriers, and according to the time slot and the node with the latest starting position in the M second time intervalsThe earliest slot of the beam position determines the first time interval. For example, the end positions of the second time intervals on the M carriers respectively correspond to time slots t _m M=1, 2, … …, M, the minimum of the M end positions being t _k1 The time slot with the latest starting position of the second time interval on the M carriers is t _y Y=1, 2, … …, M, the maximum of the M starting positions being t _k2 Then can be t according to the maximum value in M initial positions _k2 Determining the initial position of the first time interval and determining the minimum value t among the M end positions _k1 An end position of the first time interval is determined.

Correspondingly, the step S804 may specifically be:

s902, feeding back side measurement results of M carriers on Q target carriers in a first time interval.

Optionally, the first terminal device may determine, on each of the Q target carriers, a time for feeding back the side measurement results of the M carriers according to the determined first time interval, where the time for feeding back the side measurement results of the M carriers is a time that belongs to the first time interval. That is, the first terminal device may determine a transmission resource in the first time interval in which the M sidelink measurement results are fed back, and feed back CSI of the M carriers using the transmission resource.

Optionally, the first terminal device autonomously selects the sidelink transmission resource in the first time interval, and feeds back CSI of the M carriers by using the sidelink transmission resource.

Optionally, the first terminal device acquires a sidelink transmission resource allocated by the network device, and feeds back CSI of the M carriers by using the sidelink transmission resource. It should be appreciated that the network allocated sidelink transmission resources are transmission resources located within a first time interval. Optionally, the first terminal device sends indication information to the network, where the indication information is used to indicate the first time interval, so that the network device may allocate side transmission resources for the first terminal device in the first time interval.

Specifically, the side-row measurement results of M carriers are fed back on each of the Q target carriers, for example, M CSI are fed back on each of the target carriers. Optionally, the M CSI bearers are in the same PSSCH or MAC CE.

Optionally, the scheme that the first terminal device feeds back M sidestream measurement results on Q target carriers is described below by using two specific examples.

Example one: and the first terminal equipment receives the SL CSI-RS on M carriers and feeds back the M CSI on 1 carrier when the M CSI are acquired.

Fig. 10 is a schematic diagram of receiving SL CSI on M carriers and feeding back M CSI on 1 carrier. As shown in fig. 10, assuming that the sidelink multi-carrier system supports 4 sidelink carriers, the first terminal device and the second terminal device perform sidelink transmission by using the 4 sidelink carriers, in a time slot a, the second terminal device sends SL CSI-RS to the first terminal device on a carrier 0 and a carrier 1, in a time slot b, the second terminal device sends SL CSI-RS to the first terminal device on a carrier 3, and the first terminal device calculates corresponding CSI according to the SL CSI-RS on the carrier 0, the carrier 1 and the carrier 3, respectively.

On the three carriers, the first terminal device determines a second time interval of CSI feedback on each carrier according to a time slot where the SL CSI-RS received by each carrier is located and a time delay boundary, as shown by a dashed frame in fig. 10, and as shown in fig. 10, the end positions of the second time intervals of CSI feedback on carrier 0 and carrier 1 are time slots c, and the end position of the second time interval of CSI feedback on carrier 3 is time slot d. The first time interval determined from the three second time intervals on the three carriers comprises a time slot between time slot b and time slot c.

Referring to fig. 10, it is assumed that the overlapping area of the second time interval on three carriers is greater than the first threshold value, and thus, CSI on the three carriers may be carried in the same MAC CE or PSSCH and fed back on one carrier.

Optionally, when determining the carrier feeding back CSI, the first terminal device may perform carrier selection in the 3 carriers, because the first terminal device receives the SL CSI-RS in carrier 0, carrier 1, and carrier 3. Further, assuming that the CBR result measured on the carrier 0 is the lowest, at this time, the carrier 0 may be selected to feed back or report CSI on 3 carriers, and the first terminal device needs to feed back CSI of 3 carriers before the time corresponding to the time slot c, as shown in fig. 10, the first terminal device may feed back or report CSI of 3 carriers in the time slot k.

In this example, when the first terminal device receives SL CSI-RS on M carriers, the CSI of the M carriers is fed back or reported on one carrier and fed back on one PSSCH, which not only can save feedback resources, improve the system resource utilization, but also can reduce the half duplex effect.

Example two: when the first terminal equipment receives SL CSI-RS on M carriers and acquires M CSI, the first terminal equipment feeds back the CSI on the M carriers, and each carrier feeds back the M CSI.

Fig. 11 is a schematic diagram of receiving SL CSI on M carriers and feeding back M CSI on M carriers, respectively. Fig. 11 differs from fig. 10 described above in that in fig. 10, the first terminal device feeds back or reports the side-row measurement results of 3 carriers on 1 carrier, whereas in fig. 11, the first terminal device feeds back the side-row measurement results of 3 carriers on each of the 3 carriers.

As shown in fig. 11, the second time intervals for CSI feedback on carrier 0, carrier 1 and carrier 3 are shown by dashed boxes in fig. 11, and the end positions of the second time intervals for CSI feedback on carrier 0 and carrier 1 are time slots c and the end positions of the second time intervals for CSI feedback on carrier 3 are time slots d; at this time, the first terminal device may feedback CSI using the three carriers, and feedback CSI corresponding to 3 carriers on each carrier. The first time interval determined from the three second time intervals on the three carriers comprises a time slot between time slot b and time slot c.

Optionally, the first terminal device needs to perform resource selection in the first time interval, as shown in fig. 11, where a transmission resource of a time slot k1 is selected on a carrier 0, a transmission resource of a time slot k2 is selected on a carrier 1, and a transmission resource of a time slot k3 is selected on a carrier 3; and the CSI on the 3 carriers is included in the PSSCH transmitted on each carrier. Alternatively, the time slot k1, the time slot k2, and the time slot k3 selected by the first terminal device may be the same time slot or different time slots, which is not limited in the embodiment of the present application.

In this example, when the first terminal device receives the SL CSI-RS on M carriers, CSI is fed back on all the M carriers, and M CSI is fed back in each carrier, which improves the success rate of feeding back CSI.

It may be understood that, in fig. 10 and 11, the first terminal device receiving the SL CSI-RS means receiving the PSSCH with the SL CSI-RS, or receiving the SCI indicating the transmission of the SL CSI-RS, or receiving the SCI including the indication information indicating the CSI feedback, and the first terminal device feeding back the CSI means feeding back or reporting the PSSCH with the CSI feedback.

In yet another possible design of the present application, this S901 may be implemented by:

according to time delay boundary information fed back by a side line measurement result of a Q-th target carrier in the Q-th target carriers, determining a third time interval of the Q-th target carrier, wherein Q is a positive integer smaller than or equal to Q;

and determining the third time interval as the first time interval.

Optionally, in the embodiment of the present application, for the determined Q target carriers, delay boundary information fed back by a side measurement result of the Q target carrier may be determined, and further, according to the delay boundary information fed back by the side measurement result of the Q target carrier and time slot information where the side measurement result of the Q target carrier is located, a third time interval of the Q target carrier is determined. It is understood that the qth target carrier is any one of the determined Q target carriers.

Alternatively, in one possible design, the third time interval may be determined as the first time interval described above.

Correspondingly, the S804 (on Q target carriers, feedback the side measurement results of the M carriers) may specifically be: and feeding back the side measurement results of the M carriers on the q-th target carrier in the first time interval.

Optionally, when the third time interval of the q-th target carrier is determined as the first time interval, the side measurement results of the M carriers may be fed back or reported on the q-th target carrier in the first time interval.

In the embodiment of the present application, when the first terminal device receives M sidelink reference signals on M carriers and obtains the sidelink measurement results of the M carriers, a first time interval for feeding back the sidelink measurement results of the M carriers may be determined first, and in the first time interval, the sidelink measurement results of the M carriers may be fed back on Q target carriers. According to the technical scheme, the success rate of feedback can be accurately improved based on the time delay boundary information feedback of the side-going measurement result of each carrier.

Optionally, in the embodiment of the present application, delay boundary information fed back by the corresponding sidelink measurement result on each carrier is the same. For example, when the first terminal device and the second terminal device establish the PC5 connection, the second terminal device sends indication information to the first terminal device, where the indication information is used to indicate delay boundary information fed back by the sidelink measurement result, and the delay boundary information is applicable to all sidelink carriers, or all carriers used by the second terminal device and the first terminal device for sidelink communications.

From the analysis of the above embodiments, the above embodiments describe how to determine Q target carriers for feeding back or reporting the sidelink measurement results, and how to feed back the sidelink measurement results of M carriers on each target carrier for feeding back CSI. Optionally, in the embodiment of the present application, the side row measurement results of the M carriers are carried in the same MAC CE, or the side row measurement results of the M carriers are carried in the same PSSCH. The following describes how to carry the side-row measurement results of M carriers in the MAC CE through a specific embodiment.

In the embodiment of the present application, when the side-row measurement results of M carriers are carried in the MAC CE, the problem to be solved is how to let the second terminal device (transmitting terminal) know which of the side-row measurement results fed back by the first terminal device (receiving terminal) are the side-row measurement results including which carriers.

It can be understood that in the embodiment of the present application, CSI is taken as an example for explanation, and the information feedback method provided in the present application may be applicable to a case where the first terminal device (receiving terminal) feeds back other information to the second terminal device (transmitting terminal), for example, feeding back the S-RSRP measurement result, etc. For example, the CSI included in the MAC CE in the embodiment is replaced with S-RSRP information. Wherein S-RSRP is measured according to PSCCH DMRS or PSSCH DMRS.

Optionally, when the sideline reference signal is the SL CSI-RS and the sideline measurement result is CSI, when the second terminal device sends the SL CSI-RS on M carriers, but due to the half duplex limitation or the influence of CSI detection performance, the first terminal device may not detect the SL CSI-RS in all M carriers, but only detects the SL CSI-RS on a part of the carriers, at this time, the first terminal device may only feed back the detected CSI on the part of carriers, and at this time, it is required to let the second terminal device know which carriers the CSI fed back by the first terminal device corresponds to.

In the embodiment of the present application, the side row measurement results of the M carriers are illustratively carried in the same MAC CE.

Optionally, the MAC CE further includes carrier index information corresponding to the M carriers.

Specifically, in the embodiment of the present application, when the first terminal device feeds back or reports the side measurement results of the M carriers, in one possible design, the MAC CE includes the side measurement results of the M carriers; in another possible design, the MAC CE includes both side-row measurement results of M carriers and carrier index information corresponding to the M carriers.

For example, the first terminal device may include M sideline measurement results and carrier indexes corresponding to the sideline measurement results in the MAC CE, and when the second terminal device (the terminal device that sends the sideline reference signal on the M carriers) acquires the MAC CE, carrier information corresponding to each sideline measurement result may be determined.

For example, the first terminal device includes CSI to be fed back or reported and carrier indexes corresponding to each CSI in the MAC CE, and at this time, when the second terminal device (terminal device transmitting SL CSI-RS on M carriers) acquires the MAC CE, carrier information corresponding to each CSI may be determined.

Illustratively, the following description will exemplify the side-row reference signal as SL CSI-RS, and the side-row measurement result as CSI. The CSI is assumed to include CQI including 4 bits and RI including 1 bit. Alternatively, if the side-row multi-carrier system supports 8 carriers, the carrier index information corresponds to 3 bits.

Optionally, fig. 12 is a schematic diagram of a first structure of information corresponding to each carrier in the MAC CE in the embodiment of the present application. Optionally, when the first terminal device receives the SL CSI-RS on 3 carriers, for example, carrier 0, carrier 2, and carrier 3, 3 CSI needs to be fed back, and as shown in fig. 12, the MAC CE carrying CSI feedback information occupies one byte of carrier index information, RI information, and CQI information of each carrier, for example, carrier 0 index information, ri#0, and cqi#0 are located in the position of byte 1. Alternatively, in fig. 12, ri#k represents RI information corresponding to carrier k, and cqi#k represents CQI index information corresponding to carrier k, where k is any one of 0, 2, and 3.

It may be appreciated that in the above embodiment, the order of the information corresponding to each carrier shown in fig. 12 in the MAC CE may be arbitrary, and not necessarily from low to high, because when the MAC CE includes the index information of each carrier, the order of the information fields (including the carrier index, CQI, RI information) corresponding to each carrier in the MAC CE may be arbitrary. For example, for the example shown in fig. 12, the information corresponding to carrier 2 (including carrier index information and CSI) may be first discharged in the MAC CE, and then the information corresponding to each of carrier 0 and carrier 3 may be discharged.

In another possible design of the present application, the MAC CE includes M information fields, where each information field includes carrier index information and a sidelink measurement result corresponding to one carrier of the M carriers.

In this possible design, when the first terminal device receives the sidelink reference signal on M carriers, the MAC CE may include M information fields, and accordingly, each information field includes carrier index information and a sidelink measurement result corresponding to one carrier of the M carriers.

Alternatively, in this possible design, a differential index approach may be used when indicating the side row measurement results of the M carriers in the MAC CE. Correspondingly, the side-line measurement result comprises a measurement result corresponding to the first measurement quantity, and correspondingly, the MAC CE comprises first index information and M-1 differential index information.

The first index information is index information determined according to a measurement result corresponding to a first measurement quantity of the first carrier; the differential index information is differential index information determined from the measurement result of the first carrier. Optionally, the first carrier is a carrier having a measurement result corresponding to the highest first measurement quantity. It may be understood that the first carrier may also be a carrier with a measurement result corresponding to the lowest first measurement quantity, which is not limited in the embodiment of the present application.

Optionally, in the MAC CE, the carrier index information and the sidelink measurement result corresponding to the first carrier are located before the carrier index information and the sidelink measurement result corresponding to the other carriers.

Optionally, there are various ways to determine the differential index information, and the following exemplary two ways are given:

mode 1: the differential index information is determined according to a difference between a measurement result of the other carriers than the first carrier among the M carriers and a measurement result of the first carrier.

Illustratively, the CSI is a side-row measurement result, and the CQI information is a first measurement quantity. Specifically, when the first terminal device obtains CSI of M carriers, if differential CQI is adopted, the first terminal device may determine a maximum (or minimum) CQI value (note that, here, a maximum CQI value is not a maximum CQI index value) among M CQI information to be fed back, and use the maximum CQI value as a reference CQI, then determine M-1 CQI differences between other M-1 CQI values and the reference CQI, further determine M-1 differential CQI indexes corresponding to the M-1 CQI differences, and CQI indexes corresponding to the reference CQI, and accordingly, include a CQI index corresponding to the reference CQI and M-1 differential CQI indexes in the MAC CE.

It can be understood that the carrier corresponding to the reference CQI is the first carrier, and the index information corresponding to the reference CQI is the first index information.

Optionally, in the MAC CE, the carrier index information corresponding to the reference CQI and the CSI are located at a starting position in the MAC CE, and the subsequent M-1 information fields carry carrier index information and CSI corresponding to other M-1 carriers, where the CSI corresponding to the reference CQI includes the first index information and the CSI of other M-1 carriers includes the differential index information.

Optionally, in the MAC CE, the carrier index information corresponding to the reference CQI and the CSI are located in the last information field of the M information fields in the MAC CE, and the remaining M-1 information fields carry carrier index information and CSI corresponding to other M-1 carriers, where the CSI corresponding to the reference CQI includes the first index information, and the CSI of the other M-1 carriers includes the differential index information.

Illustratively, it is assumed that the CSI includes CQI and RI, wherein the CQI includes 4 bits, the differential CQI includes 3 bits, and the RI includes 1 bit. Alternatively, if the side-row multi-carrier system supports 8 carriers, the carrier index information corresponds to 3 bits. Fig. 13 is a second structural diagram of information corresponding to each carrier in the MAC CE in the embodiment of the present application. Alternatively, when the first terminal device receives the SL CSI-RS on 3 carriers such as carrier 0, carrier 2, carrier 3, etc., 3 CSI needs to be fed back, where the CQI value on carrier 2 is the largest, so that the difference between the CQI on carrier 0 and carrier 3 relative to the CQI on carrier 2 can be calculated, and the differential CQI index corresponding to the difference can be determined.

Alternatively, referring to fig. 13, in the MAC CE, information corresponding to carrier 2 (including carrier index information, CSI) is located at a start position of the MAC CE, and information corresponding to carrier 0 and carrier 3 (carrier index information, CSI, where CSI includes a differential CQI index) is located in a subsequent information field. Wherein ri#k represents RI information corresponding to carrier k, cqi#k represents CQI index information corresponding to carrier k, diff_cqi#k represents differential CQI index information corresponding to carrier k, and R represents a reservation information bit.

Mode 2: the differential index information is determined according to a difference between an index corresponding to a measurement result of the other carrier than the first carrier among the M carriers and an index corresponding to the first index information.

Illustratively, the CSI is a side-row measurement result, and the CQI information is a first measurement quantity. Specifically, when the first terminal device obtains CSI of M carriers, if differential CQI is adopted, the first terminal device may determine a maximum (or minimum) CQI index (note that, here, a maximum CQI index value is not the maximum CQI value) from M CQI information to be fed back, and use the CQI corresponding to the maximum CQI index value as a reference CQI, then determine M-1 CQI index differences between other M-1 CQI index values and index values of the reference CQI, and further determine differential CQI indexes corresponding to the M-1 CQI index differences, where correspondingly, the CQI indexes corresponding to the reference CQI and the M-1 differential CQI indexes are included in the MAC CE.

Illustratively, it is also assumed that the CSI includes CQI and RI, wherein the CQI includes 4 bits, the differential CQI includes 2 bits, and the RI includes 1 bit. Alternatively, if the side-row multi-carrier system supports 8 carriers, the carrier index information corresponds to 3 bits. Fig. 14 is a third structural diagram of information corresponding to each carrier in the MAC CE according to the embodiment of the present application. Alternatively, when the first terminal device detects the SL CSI-RS on 3 carriers (for example, carrier 0, carrier 2, and carrier 3), 3 CSI needs to be fed back, for example, the CQI index value on carrier 2 is the largest, at this time, the difference between the CQI indexes of carrier 0 and carrier 3 with respect to the CQI index of carrier 2, respectively, may be calculated, and the differential CQI index corresponding to the difference may be determined.

Alternatively, referring to fig. 14, in the MAC CE, information (carrier index information, CSI) corresponding to carrier 2 is located at a start position of the MAC CE, and information (carrier index information, CSI, where CSI includes differential CQI index) corresponding to carrier 0 and carrier 3 is located in a subsequent information domain. Wherein ri#k represents RI information corresponding to carrier k, cqi#k represents CQI index information corresponding to carrier k, diff_cqi#k represents differential CQI index corresponding to carrier k, and R represents reservation information bits.

As can be seen from the above analysis, in the above embodiment 1, the CQI having the largest CQI value (or the smallest CQI value) among the M CSI is used as the reference CQI, and the difference between the other M-1 CQIs and the reference CQI is calculated to obtain the differential CQI; in the above embodiment 2, the CQI having the largest CQI index value (or the smallest CQI index value) among the M CSI is used as the reference CQI, and the difference between the other M-1 CQIs and the reference CQI is calculated to obtain the differential CQI. It can be understood that in practical application, the CQI corresponding to the first carrier may be used as a reference CQI, and the difference between the CQI of other M-1 carriers and the reference CQI may be calculated to obtain a differential CQI. For example, in the above embodiment 1 or embodiment 2, the CQI #0 corresponding to the carrier 0 is used as the reference CQI, and the difference between the CQI of the carrier 2 and the CQI of the carrier 3 with respect to the CQI of the carrier 0 is calculated, and accordingly, in the MAC CE, the information of the carrier 0 (including the carrier index information and the CSI) is located at the start position of the information field included in the MAC CE, and the information of the carrier 2 and the carrier 3 (including the carrier index information and the CSI) is located after the information of the carrier 0.

In still another possible design of the embodiment of the present application, the MAC CE includes N information fields, where N is a maximum number of carriers for the first terminal device and the second terminal device to perform side communication, or N is a maximum number of carriers supported by the side system, and N is an integer greater than or equal to M.

In this possible design, the maximum number of carriers for the first terminal device and the second terminal device to perform sidelink communication is determined through PC5-RRC interaction or according to pre-configuration information or network information.

As one example, the side row measurements of the N carriers are sequentially arranged in the MAC CE in carrier index order.

Specifically, the N information domains and the N carriers have a first correspondence relationship therebetween, where the first correspondence relationship is predefined, or determined according to pre-configuration information, or determined according to network configuration information. The first correspondence may be a one-to-one correspondence of a positive sequence or a one-to-one correspondence of a negative sequence, which is not described herein.

Optionally, if a second carrier of the N carriers has no sidelink measurement result, the second carrier fills a special symbol in an information field corresponding to the second carrier in the MAC CE, where the special symbol is used to indicate that the information field has no bearer sidelink measurement result. For example, the special symbol is padding bits (padding bits).

For example, when the sidestream multi-carrier system supports N carriers, N information fields are included in the MAC CE, CSI corresponding to the N carriers respectively, each information field includes CSI corresponding to the carrier, and CSI corresponding to each carrier is sequentially arranged in the MAC CE, that is, CSI corresponding to carrier 0 in the first information field, CSI corresponding to carrier 1 in the second information field, and so on; or vice versa, the first information field corresponds to the CSI of carrier N, the second information field corresponds to the CSI of carrier N-1, and so on. If no CSI feedback is available on a carrier, the information field is marked with a padding placeholder or special symbol.

Fig. 15 is a schematic diagram of a fourth structure of information corresponding to each carrier in the MAC CE according to the embodiment of the present application. Alternatively, the CSI includes CQI information and RI information, wherein the CQI information includes 4 bits and the RI information includes 1 bit.

Referring to fig. 15, if the side-row multi-carrier system supports 8 carriers, the MAC CE includes 8 information fields in total, each of which includes RI and CQI information. Correspondingly, when the first terminal equipment detects the SL CSI-RS on the carrier 0, the carrier 2 and the carrier 3, the corresponding information fields of the 3 carriers in the MAC CE comprise corresponding RI/CQI information, and the information fields corresponding to the other 5 carriers are filled with placeholders. Wherein ri#k represents RI information corresponding to carrier k, cqi#k represents CQI information corresponding to carrier k, and N/a represents a placeholder.

Optionally, in an embodiment of the present application, the sidestream measurement result includes a measurement result corresponding to the first measurement quantity, and the corresponding measurement result is: the MAC CE comprises first index information and N-1 differential index information;

the first index information is index information determined according to a measurement result corresponding to a first measurement quantity of the first carrier; the differential index information is differential index information determined according to a measurement result of the first carrier; the first carrier is a carrier having a measurement result corresponding to the highest (or lowest) first measurement quantity.

Optionally, in one possible design, the MAC CE further includes carrier index information of the first carrier.

In this embodiment, the first terminal device may further carry side measurement information of M carriers to a MAC CE having N information domains for feedback or reporting. In order to enable the second terminal device to identify which carrier's side-row measurement information is used as the reference measurement information after receiving the MAC CE, the MAC CE may include carrier index information of the first carrier.

In the MAC CE, the carrier index information and the sidelink measurement result corresponding to the first carrier are located before the sidelink measurement results corresponding to the other carriers.

As an example, side row measurement results of N-1 carriers other than the first carrier among the N carriers are sequentially arranged in the carrier index order after the carrier index information and the side row measurement results corresponding to the first carrier.

It can be understood that, by arranging the carrier index information and the side measurement results corresponding to the first carrier before the side measurement results corresponding to the other carriers, the side measurement results of the other N-1 carriers are sequentially arranged after the carrier index information and the side measurement results corresponding to the first carrier according to the carrier index sequence, and in such an arrangement manner, the second terminal device can also correspondingly determine the side measurement results of the other N-1 carriers after determining the side measurement results of the first carrier.

In one possible design, if a third carrier of the N carriers has no sidelink measurement result, the third carrier fills a special symbol in a corresponding information field of the MAC CE, where the special symbol is used to indicate that the information field has no bearer sidelink measurement result; or the differential index information corresponding to the third carrier is an invalid index or a reserved index.

Alternatively, in this embodiment, the side-row measurement result is taken as CSI, and the first measurement quantity is taken as CQI information for explanation. Specifically, when the first terminal device obtains CSI of M carriers, the first index information and N-1 differential index information included in the MAC CE may be determined by adopting a differential CQI manner based on the maximum carrier number N supported by the side-row multi-carrier system.

It can be understood that, in this embodiment, the manner of determining the differential index information may be referred to the above manner 1 and manner 2, and will not be described herein. However, in the MAC CE, carrier index information of the first carrier corresponding to the reference CQI needs to be carried, and the carrier index information and CSI corresponding to the first carrier are located at a starting position in the MAC CE, differential CQIs of the remaining N-1 carriers are sequentially discharged in the MAC CE, and carrier index information of the remaining N-1 carriers does not need to be carried.

For the carrier without CSI, the CSI padding placeholders or special symbols on the corresponding information fields are marked, and the length of the information fields is the same as the length of the information fields corresponding to the differential CQI.

As an example, in the embodiment of the present application, the differential index information is determined according to a difference between a measurement result of the other carrier than the first carrier among the M carriers and a measurement result of the first carrier.

The determining the first carrier manner may be referred to the description in the above embodiments, and will not be repeated herein.

Fig. 16 is a schematic diagram of a fifth structure of information corresponding to each carrier in the MAC CE according to the embodiment of the present application. Optionally, the CSI includes CQI information and RI information, where the CQI information includes 4 bits, the RI information includes 1 bit, and the differential CQI may be determined in a manner of mode 1, and the differential CQI includes 3 bits; in this embodiment, the side-row multi-carrier system is used to support 8 carriers for explanation, and the carrier index information corresponds to 3 bits correspondingly.

In this example, when the first terminal device detects the SL CSI-RS on 3 carriers (the 3 carriers are, for example, carrier 0, carrier 2, carrier 3), the 3 carriers corresponding to CSI need to be fed back, wherein the CQI value on carrier 2 is the largest, and therefore, taken as the reference CQI, and the difference between the CQI of carrier 0 and carrier 3 with respect to the reference CQI is calculated, respectively, and the differential CQI index corresponding to the difference is determined.

For example, referring to fig. 16, in the MAC CE, the information corresponding to the carrier 2 is located at the start position of the MAC CE, including the carrier index information of the carrier 2 and the corresponding CSI, and the CSI corresponding to the remaining carriers are sequentially discharged, and since there is no CSI on the carrier 1, the carrier 4, the carrier 5, the carrier 6 and the carrier 7, the corresponding information fields thereof are filled with special symbols, such as placeholders or filling bits, and thus, the structure of feeding back CSI on the MAC CE by the first terminal device is as shown in fig. 16. Wherein ri#k represents RI information corresponding to carrier k, cqi#k represents CQI information corresponding to carrier k, diff_cqi#k represents differential CQI information corresponding to carrier k, N/a represents a placeholder, and R represents a reservation information bit.

As another example, in the embodiment of the present application, the differential index information is determined according to a difference between an index corresponding to a measurement result of the other carrier than the first carrier among the M carriers and an index corresponding to the first index information.

Fig. 17 is a schematic diagram of a sixth structure of information corresponding to each carrier in the MAC CE according to the embodiment of the present application. Alternatively, the CSI includes CQI information and RI information, wherein the CQI information includes 4 bits, the RI information includes 1 bit, and the differential CQI may be determined in a manner of 2, and the differential CQI includes 2 bits. In this embodiment, the side-row multi-carrier system is used to support 8 carriers for explanation, and the carrier index information corresponds to 3 bits correspondingly.

In this example, when the first terminal device detects SL CSI-RS on 3 carriers (for example, carrier 0, carrier 2, carrier 3), the 3 carriers corresponding to CSI need to be fed back, wherein the CQI index value on carrier 2 is the largest, and therefore, the CQI on carrier 2 is taken as the reference CQI, and the difference between the CQI indexes of carrier 0 and carrier 3 with respect to the CQI index of the reference CQI is calculated, respectively, and the differential CQI index corresponding to each difference is determined.

Correspondingly, in the MAC CE, the information corresponding to the carrier 2 is located at the starting position of the MAC CE, the information corresponding to the carrier 2 includes carrier index information of the carrier 2 and corresponding CSI (RI information and CQI information), and CSI corresponding to the remaining carriers is sequentially discharged.

Since there is no CSI on carrier 1, carrier 4, carrier 5, carrier 6, and carrier 7, the information fields corresponding to carrier 1, carrier 4, carrier 5, carrier 6, and carrier 7 are filled with special symbols, such as placeholders or filling bits, as shown in fig. 17. Wherein ri#k represents RI information corresponding to carrier k, cqi#k represents CQI information corresponding to carrier k, diff_cqi#k represents differential CQI information corresponding to carrier k, N/a represents a placeholder, and R represents a reservation information bit.

It will be appreciated that in the above embodiments of the present application, the first measurement quantity comprises a sidelink reference signal received power S-RSRP or a channel quality indicator CQI. For example, when the sidelink reference signal is SL CSI-RS, the sidelink measurement result is CSI, and accordingly, the first measurement quantity may be CQI; the first measurement may be S-RSRP when the sidelink reference signal is PSCCH DMRS or PSSCH DMRS. The specific form of the first measurement may be determined according to the actual scenario, which is not described herein.

It should be understood that, in the above embodiment, the CSI includes RI and CQI as an example, and PMI information and/or HARQ-ACK information may also be included in the CSI, which is not limited in this application; in addition, in the above embodiments, the RI occupies 1 bit, the CQI occupies 4 bits, and the differential CQI occupies 2 bits or 3 bits are taken as examples, and the number of bits occupied by each information is not limited in this application, and may be determined according to the actual scenario.

It should be understood that in the above embodiment, the order between the information corresponding to each carrier in the MAC CE is not limited, and may be, for example, the order of carrier index information, RI information, CQI information, or the order of RI information, CQI information, carrier index information.

The analysis shows that the specific implementation of the side-line measurement results of feeding back the M carriers on the same MAC CE is introduced, and based on the technical scheme of the application, the purpose of feeding back the side-line measurement results in the side-line multi-carrier system is achieved, and the feedback success rate of the side-line measurement results is improved.

Optionally, in an embodiment of the present application, fig. 18 is a schematic flow chart of a third embodiment of an information feedback method provided in the present application. As shown in fig. 18, the information feedback method may include the steps of:

s1801, receiving side line reference signals on K carriers; wherein K is an integer greater than or equal to M.

Optionally, in the embodiment of the present application, when the second terminal device sends the sidestream reference signal to the first terminal device, the first terminal device may detect on a channel to receive the sidestream reference signal sent by the second terminal device. For example, the first terminal device detects and receives sidestream reference signals on K carriers. It is understood that the second terminal device should have transmitted sidelink reference signals on greater than or equal to K carriers.

S1802, acquiring side line measurement results of K carriers according to the side line reference signals.

In this step, the second terminal device obtains the sidestream measurement result on each of the K carriers according to the received sidestream reference signal, and correspondingly, may obtain the sidestream measurement results of the K carriers.

S1803, selecting M carriers from the K carriers.

Alternatively, the first terminal device may randomly select M carriers from the K carriers.

Alternatively, the first terminal may select M carriers from the K carriers based on the CBR measurement result. For example, the M carriers with the lowest CBR measurement result are selected.

Alternatively, the first terminal may select M carriers from the K carriers based on the priority. For example, the carrier in which the highest M PSSCHs in the priority corresponding to the PSSCHs simultaneously transmitted by the sidelink reference signal are located is selected.

Optionally, the first terminal device selects M carriers meeting the conditions from the K carriers, and feeds back the sidestream measurement results corresponding to the M carriers to the second terminal device.

Optionally, in this embodiment, the first terminal device may further determine the value of M according to third information; wherein the third information includes at least one of the following information:

Priority information;

configuration information sent by the network equipment;

pre-configuration information.

Alternatively, the first terminal device may determine the value of M based on priority information corresponding to the PSSCH transmitted with the sidelink reference signal. For example, when the first terminal device receives or detects K SL CSI-RS on K carriers, it may acquire K priority information of PSSCH associated with the K SL CSI-RS, and further determine, according to the K priority information, the carrier number M of the sidelink measurement result to be fed back.

Alternatively, the second terminal device may send indication information to the first terminal device, where the indication information is used to indicate the number M of carriers of the side-line measurement result to be fed back by the first terminal device, for example, the SCI or the MAC CE sent by the second terminal device to the first terminal device includes indication information, where the indication information is used to indicate the number M of carriers of the side-line measurement result to be fed back by the second terminal device. Or, the first terminal device sends indication information to the second terminal device, where the indication information is used to indicate the number of carriers M of the CSI fed back or reported by the first terminal device, for example, the indication information is included in the SCI or MAC CE sent by the first terminal device to the second terminal device, and is used to indicate the number of carriers M of the fed back sidelink measurement result. For another example, when the first terminal device and the second terminal device establish PC5 connection, the second terminal device sends an indication to the first terminal device through PC5-RRC signaling, where the indication is used to indicate the number M of carriers of the sidestream measurement result to be fed back by the first terminal device; or the first terminal equipment sends an indication to the second terminal equipment through PC5-RRC signaling, wherein the indication is used for indicating the carrier number M of the sidestream measurement result to be fed back by the first terminal equipment.

Optionally, the first terminal device may acquire configuration information sent by the network device from the network device, and determine, based on indication information included in the configuration information, the carrier number M of the side-going measurement result to be fed back. Alternatively, the configuration information may be side BWP configuration information, and the indication information in the side BWP configuration information is used to indicate the number M of carriers of the side measurement result to be fed back. Alternatively, the configuration information may be resource pool RP configuration information, where indication information in the RP configuration information is used to indicate the number M of carriers of the sidelink measurement result to be fed back.

Optionally, the first terminal device may select a transmission resource from the resource pool according to the preconfiguration information, and determine the carrier number M of the side-going measurement result to be fed back. Alternatively, the pre-configuration information may be side row BWP configuration information, and the indication information in the side row BWP configuration information is used to indicate the number M of carriers of the side row measurement result to be fed back. Alternatively, the pre-configuration information may be resource pool RP configuration information, where indication information in the RP configuration information is used to indicate the number M of carriers of the sidelink measurement result to be fed back.

Alternatively, as an example, the specific manner in which the first terminal device selects M carriers from K carriers may be as follows:

And selecting M carriers from the K carriers according to the order of the priority information from high to low. Wherein the priority information is determined according to the priority of PSSCHs transmitted simultaneously with the side reference signals of the K carriers.

In the embodiment of the present application, the first terminal device first determines, according to the third information, the number M of carriers of the sidelink measurement result to be fed back, then selects M carriers with the highest priority from the K carriers, and feeds back the corresponding sidelink measurement result.

As another example, a specific manner of selecting M carriers from K carriers may be as follows:

m carriers are selected according to the overlapping parts of K fourth time intervals corresponding to the K carriers, and the overlapping parts of the fourth time intervals corresponding to the M carriers are larger than or equal to a second threshold value.

Wherein the second threshold value is determined according to at least one of the following information:

configuration information sent by the network equipment;

pre-configuration information.

Optionally, when the first terminal device detects and obtains the side line measurement results of the K carriers on the K carriers, for each carrier of the K carriers, the first terminal device may determine a corresponding fourth time interval. For example, for the kth carrier in the K carriers, the first terminal device may first obtain delay boundary information fed back by the side line measurement result of the kth carrier, and then determine the fourth time interval of the kth carrier according to the delay boundary information fed back by the side line measurement result of the kth carrier and the time slot information where the side line reference signal on the kth carrier is located.

Correspondingly, the first terminal device may first determine an overlapping portion of the K fourth time intervals according to the K fourth time intervals corresponding to the K carriers, and then determine, based on a relationship between the overlapping portion and a second threshold, M carriers, for example, the overlapping portion of the M fourth time intervals corresponding to the M carriers is greater than or equal to the second threshold.

In the embodiment of the present application, the first terminal device may first obtain side measurement results of K carriers, then determine M carriers that satisfy a condition in the K carriers, and feed back the measurement results thereof. The condition is that the overlapping part of the fourth time range corresponding to the M carriers is greater than a second threshold value. If the overlapping portion of the K fourth time ranges of the K carriers is greater than the second threshold, m=k, that is, the side-row measurement results corresponding to all the carriers in the K carriers are fed back.

Optionally, the resource pool or the side BWP configuration information includes indication information, where the indication information is used to indicate the second threshold value. Optionally, in the process that the second terminal device and the first terminal device perform the sidestream RRC connection establishment, the second terminal device sends indication information to the first terminal device or the first terminal device sends indication information to the second terminal device, where the indication information is used to indicate the second threshold value. Optionally, the first terminal device may further determine the first threshold according to priority information or other information, which may be determined according to an actual scenario, which is not described herein.

Optionally, in an embodiment of the present application, a specific implementation of the first terminal device to determine the fourth time interval corresponding to the kth carrier may be as follows:

and acquiring time delay boundary information fed back by the side line measurement result of the kth carrier in the K carriers, and determining a fourth time interval corresponding to the kth carrier according to the time delay boundary information fed back by the side line measurement result of the kth carrier. The fourth time interval is used for indicating a time interval for feeding back the side measurement result on the kth carrier.

Optionally, in the embodiment of the present application, the first terminal device may determine delay boundary information fed back by a side measurement result of a kth carrier in the K carriers according to a parameter sl-latency bound si-Report in the PC5-RRC signaling, where the kth carrier is any one of the K carriers, and then determine a fourth time interval of the kth carrier according to the delay boundary information fed back by the side measurement result of the kth carrier and time slot information where a side reference signal on the kth carrier is located.

In the embodiment of the present application, the first terminal device may receive the sidelink reference signals on K carriers, obtain sidelink measurement results of the K carriers according to the sidelink reference signals, and finally select M carriers from the K carriers. In the technical scheme, the first terminal equipment can select the feedback or reported side-row measurement results of M carriers, and can provide conditions for the second terminal equipment to adjust transmission parameters.

Fig. 19 is a schematic structural diagram of an embodiment of an information feedback device provided in the present application. The device may be integrated in the first terminal device, or may be the first terminal device. As shown in fig. 19, the apparatus may include:

a receiving module 1901, configured to receive side line reference signals on M carriers, where M is an integer greater than or equal to 2;

a receiving module 1902, configured to obtain sidelink measurement results of the M carriers according to the sidelink reference signal;

a determining module 1903, configured to determine Q target carriers, where Q is a positive integer;

and a sending module 1904, configured to feed back side row measurement results of the M carriers on the Q target carriers.

In one possible design of the embodiment of the present application, the determining module 1903 is specifically configured to determine Q target carriers according to the first information;

the carrier wave of the sidestream reference signal or the carrier wave of the received sidestream reference signal;

priority information corresponding to a physical sidelink shared channel PSSCH associated with the sidelink reference signal;

channel occupancy;

carrier index information;

indication information of a second terminal device or indication information of the first terminal device;

Carrier information corresponding to the logical channel associated with the sidestream measurement result;

carrier information corresponding to a logical channel associated with a PSSCH channel carrying side line measurement results of the M carriers;

the first terminal equipment selects carrier information for transmitting PSSCH;

the second terminal device is a terminal device sending the sidestream reference signal.

Optionally, the determining module 1903 is specifically configured to determine the value of Q according to the second information;

priority information;

the indication information of the second terminal device or the indication information of the first terminal device;

configuration information sent by the network equipment;

pre-configuration information;

and the value of M is taken.

Optionally, the sending module 1904 is specifically configured to feed back a sidelink measurement result of the M carriers on each of the Q target carriers.

In another possible design of the embodiment of the present application, the determining module 1903 is further configured to determine a first time interval;

correspondingly, the sending module 1904 is specifically configured to feed back, during the first time interval, side-row measurement results of the M carriers on the Q target carriers.

Optionally, the determining module 1903 is specifically configured to:

determining a second time interval of an mth carrier in the M carriers, wherein M is a positive integer less than or equal to M;

and determining the first time interval according to the overlapped part of M second time intervals of the M carriers, wherein the second time interval is determined according to time delay boundary information fed back by a side line measurement result of an mth carrier in the M carriers.

Optionally, the determining module 1903 is specifically configured to:

acquiring time delay boundary information fed back by a side line measurement result of an mth carrier;

and determining a second time interval of the mth carrier according to the time delay boundary information fed back by the side line measuring result of the mth carrier and the time slot information of the side line reference signal on the mth carrier.

Optionally, the overlapping portion of the M second time intervals of the M carriers is greater than or equal to a first threshold value.

Optionally, the first threshold value is determined according to at least one of the following information:

configuration information sent by the network equipment;

pre-configuration information.

In yet another possible design of the embodiments of the present application, the determining module 1903 is specifically configured to determine the first time interval according to at least one of the following information:

time delay boundary information fed back by the lateral measurement result;

and the latest time slot position in the time slots where the M sidelink reference signals are positioned.

Optionally, the determining module 1903 is specifically configured to:

according to time delay boundary information fed back by a side line measuring result of a Q-th target carrier in the Q target carriers, determining a third time interval of the Q-th target carrier, wherein Q is a positive integer smaller than or equal to Q;

determining the third time interval as the first time interval;

correspondingly, the sending module 1904 is specifically configured to feed back, in the first time interval, the side-row measurement results of the M carriers on the qth target carrier.

In each of the above possible designs of the embodiments of the present application, the side row measurement results of the M carriers are carried in a control unit MAC CE of the same medium access control layer.

Optionally, the MAC CE includes M information fields, where each information field includes carrier index information and a sidelink measurement result corresponding to one carrier of the M carriers.

Optionally, the sidestream measurement result includes a measurement result corresponding to the first measurement quantity, and correspondingly, the MAC CE includes first index information and M-1 differential index information;

the first index information is index information determined according to a measurement result corresponding to a first measurement quantity of a first carrier; the differential index information is determined according to the measurement result of the first carrier wave; the first carrier is a carrier having a measurement result corresponding to the highest first measurement quantity.

Optionally, the differential index information is differential index information determined according to a measurement result of the first carrier, including:

the differential index information is determined according to a difference between a measurement result of the other carriers than the first carrier among the M carriers and a measurement result of the first carrier.

the differential index information is determined according to a difference between indexes corresponding to measurement results of other carriers than the first carrier among the M carriers and indexes corresponding to the first index information.

In yet another possible design of the embodiment of the present application, the MAC CE includes N information fields, where N is a maximum number of carriers for performing side communication by the first terminal device and the second terminal device, and N is an integer greater than or equal to M.

Optionally, the side row measurement results of the N carriers are sequentially arranged in the MAC CE according to a carrier index order.

Optionally, the N information domains and the N carriers have a first correspondence relationship therebetween, where the first correspondence relationship is predefined, or determined according to pre-configuration information, or determined according to network configuration information.

Optionally, if a second carrier of the N carriers has no sidelink measurement result, the second carrier fills a special symbol in an information field corresponding to the MAC CE, where the special symbol is used to indicate that the information field has no bearer sidelink measurement result.

Optionally, the sideways measurement result includes a measurement result corresponding to the first measurement quantity, and the measurement result corresponds to: the MAC CE comprises first index information and N-1 differential index information;

the differential index information is determined according to a difference between a measurement result of the other carriers except the first carrier among the M carriers and the measurement result of the first carrier.

Optionally, the MAC CE further includes carrier index information of the first carrier.

Optionally, in the MAC CE, the carrier index information and the sidelink measurement result corresponding to the first carrier are located before the sidelink measurement results corresponding to other carriers.

Optionally, the side measurement results of the N-1 carriers other than the first carrier are sequentially arranged after the carrier index information and the side measurement results corresponding to the first carrier according to the carrier index sequence.

Optionally, if a third carrier of the N carriers has no sidelink measurement result, the third carrier fills a special symbol in an information field corresponding to the third carrier in the MAC CE, where the special symbol is used to indicate that the information field has no bearer sidelink measurement result; or the differential index information corresponding to the third carrier is an invalid index or a reserved index.

In the above possible design of the embodiment of the present application, the first measurement quantity includes a sidelink reference signal received power S-RSRP or a channel quality indicator CQI.

In yet another possible design of the embodiment of the present application, the receiving module 1901 is further configured to receive sidelink reference signals on K carriers;

the receiving module 1902 is further configured to obtain sidestream measurement results of the K carriers according to the sidestream reference signal;

the determining module 1903 is further configured to select the M carriers from the K carriers; where K is an integer greater than or equal to M.

Optionally, the determining module 1903 is further configured to determine a value of M according to third information;

Wherein the third information includes at least one of the following information:

priority information;

configuration information sent by the network equipment;

pre-configuration information.

Optionally, the determining module 1903 is specifically configured to select the M carriers from the K carriers according to the order of the priority information from high to low.

Optionally, the priority information is determined according to the priority of the PSSCH transmitted simultaneously with the side row reference signals of the K carriers.

Optionally, the determining module 1903 is further configured to:

acquiring time delay boundary information fed back by a side-line measurement result of a kth carrier in the K carriers;

determining a fourth time interval corresponding to the kth carrier according to time delay boundary information fed back by the side line measurement result of the kth carrier; the fourth time interval is used for indicating a time interval for feeding back a sidestream measurement result on the kth carrier.

Optionally, the determining module 1903 is specifically configured to select M carriers according to the overlapping portions of the K fourth time intervals corresponding to the K carriers, where the overlapping portions of the fourth time intervals corresponding to the M carriers are greater than or equal to a second threshold value.

Optionally, the second threshold value is determined according to at least one of the following information:

configuration information sent by the network equipment;

pre-configuration information.

In each possible design of the embodiment of the present application, the sidestream reference signal is any one of the following information:

sidestream channel state information reference signal SL CSI-RS, physical sidestream shared channel demodulation reference signal PSSCH DMRS, physical sidestream control channel demodulation reference signal PSCCH DMRS.

Optionally, the sideways measurement result includes at least one of the following information:

channel quality indication, CQI, rank indication, RI, precoding matrix indication, PMI, or sidelink reference signal received power, S-RSRP.

The apparatus provided in this embodiment is configured to execute the technical solution on the first terminal device side in the foregoing embodiment, where the implementation principle and the technical effects are similar, and when the first terminal device receives the sidelink reference signal on multiple carriers, after obtaining the sidelink measurement results of the multiple carriers according to the sidelink reference signal, one or more target carriers for feeding back the sidelink measurement results of the multiple carriers may be determined, and feedback or report may be performed on the one or more target carriers. The technical scheme provides an implementation scheme for feeding back or reporting the multi-carrier side-row measurement result by the receiving terminal in the side-row multi-carrier system, which can improve the utilization rate of system resources, reduce the influence of half duplex or improve the success rate of the feedback of the side-row measurement result.

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

It should be noted that, it should be understood that the division of the modules of the above apparatus is merely a division of a logic function, and may be fully or partially integrated into a physical entity or may be physically separated. And these modules may all be implemented in software in the form of calls by the processing element; or can be realized in hardware; the method can also be realized in a form of calling software by a processing element, and the method can be realized in a form of hardware by a part of modules. For example, the processing module may be a processing element that is set up separately, may be implemented in a chip of the above apparatus, or may be stored in a memory of the above apparatus in the form of program code, and may be called by a processing element of the above apparatus to execute the functions of the above determination module. The implementation of the other modules is similar. In addition, all or part of the modules can be integrated together or can be independently implemented. The processing element described herein may be an integrated circuit having signal processing capabilities. In implementation, each step of the above method or each module above may be implemented by an integrated logic circuit of hardware in a processor element or an instruction in a software form. For example, the modules above may be one or more integrated circuits configured to implement the methods above, such as: one or more specific integrated circuits (application specific integrated circuit, ASIC), or one or more microprocessors (digital signal processor, DSP), or one or more field programmable gate arrays (field programmable gate array, FPGA), or the like. For another example, when a module above is implemented in the form of a processing element scheduler code, the processing element may be a general purpose processor, such as a central processing unit (central processing unit, CPU) or other processor that may invoke the program code. For another example, the modules may be integrated together and implemented in the form of a system-on-a-chip (SOC).

In the above embodiments, it may be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented in software, may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When loaded and executed on a computer, produces a flow or function in accordance with embodiments of the present application, in whole or in part. The computer may be a general purpose computer, a special purpose computer, a computer network, or other programmable apparatus. The computer instructions may be stored in or transmitted from one computer-readable storage medium to another, for example, by wired (e.g., coaxial cable, optical fiber, digital Subscriber Line (DSL)), or wireless (e.g., infrared, wireless, microwave, etc.). The computer readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server, data center, etc. that contains an integration of one or more available media. The usable medium may be a magnetic medium (e.g., floppy disk, hard disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium (e.g., solid State Disk (SSD)), etc.

Fig. 20 is a schematic structural diagram of an embodiment of a terminal device provided in the present application. The terminal device may be any one of the terminal devices in the sidestream communication system, for example, the terminal device is the first terminal device in the foregoing embodiment. As shown in fig. 20, the terminal device may include: a processor 2001, a memory 2002, a transceiver 2003 and a system bus 2004. The memory 2002 and the transceiver 2003 are connected to the processor 2001 via the system bus 2004 and communicate with each other.

The processor 2001 is configured to obtain computer instructions from the memory 2002, and execute the computer instructions to implement the technical solution of the first terminal device in the method embodiment.

The memory 2002 is used for storing computer instructions, which may be a separate device from the processor 2001, or may be integrated into the processor 2001, without limitation.

The transceiver 2003 is configured to communicate with other devices, and specifically, may acquire a sidestream reference signal sent by the other devices, and feed back or report an acquired sidestream measurement result. It is understood that the transceiver 2003 may be referred to as a communication interface.

In fig. 20, the system bus 2004 may be a peripheral component interconnect standard (peripheral component interconnect, PCI) bus, or an extended industry standard architecture (extended industry standard architecture, EISA) bus, or the like. The system bus may be classified into an address bus, a data bus, a control bus, and the like. For ease of illustration, the figures are shown with only one bold line, but not with only one bus or one type of bus. The communication interface is used to enable communication between the database access apparatus and other devices (e.g., clients, read-write libraries, and read-only libraries). The memory may comprise random access memory (random access memory, RAM) and may also include non-volatile memory (non-volatile memory), such as at least one disk memory.

The processor may be a general-purpose processor, including a Central Processing Unit (CPU), a network processor (network processor, NP), etc.; but may also be a digital signal processor DSP, an application specific integrated circuit ASIC, a field programmable gate array FPGA or other programmable logic device, a discrete gate or transistor logic device, a discrete hardware component.

The memory described above may be volatile memory or nonvolatile memory, or may include both volatile and nonvolatile memory. The nonvolatile memory may be a read-only memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an electrically Erasable EPROM (EEPROM), or a flash memory. The volatile memory may be random access memory (random access memory, RAM) which acts as an external cache.

Fig. 21 is a schematic structural diagram of an embodiment of a communication system provided in the present application. As shown in fig. 21, the communication system includes a first terminal device 2101 and a second terminal device 2102.

Wherein the first terminal device 2101 may be the information feedback apparatus of the above embodiment, and the second terminal device 2102 may be in communication with the first terminal device 2101.

For example, the communication system may be referred to as a car networking system or a D2D system.

Optionally, the communication system of the present application may further include: the network device 2103. The network device 2103 may provide services to the first terminal device 2101 and/or the second terminal device 2102.

In this embodiment, the specific implementation manner of the first terminal device 2101 may be referred to the description in the above method embodiment, and will not be described herein.

The embodiment of the application also provides a computer readable storage medium, wherein the computer readable storage medium stores computer instructions, and the computer instructions are used for realizing the technical scheme of the first terminal device in the embodiment of the method when being executed by a processor.

The embodiment of the application also provides a computer program, which is used for executing the technical scheme of the first terminal device in the embodiment of the method when being executed by a processor.

The embodiment of the application also provides a computer program product, which comprises a computer program, and the computer program is used for realizing the technical scheme of the first terminal device in the embodiment of the method when being executed by a processor.

The embodiment of the application also provides a chip, which comprises: the processing module and the communication interface, where the processing module can execute the technical solution of the first terminal device in the foregoing method embodiment.

Further, the chip further includes a storage module (e.g., a memory), where the storage module is configured to store the instruction, and the processing module is configured to execute the instruction stored in the storage module, and execution of the instruction stored in the storage module causes the processing module to execute the technical solution of the first terminal device in the foregoing method embodiment.

By way of example, the chip may include a memory, a processor, the memory storing code and data, the memory being coupled to the processor, the processor executing the code in the memory causing the chip to perform the technical solution of the first terminal device in the above-described method embodiment.

In the several embodiments provided in this application, it should be understood that the disclosed systems, apparatuses, and methods may be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative, e.g., the division of the units is merely a logical function division, and there may be additional divisions when actually implemented, e.g., multiple units or components may be combined or integrated into another system, or some features may be omitted or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or units, which may be in electrical, mechanical or other form.

In 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 front and rear associated objects are an "or" relationship; in the formula, the character "/" indicates that the front and rear associated objects are a "division" 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).

It will be appreciated that the various numerical numbers referred to in the embodiments of the present application are merely for ease of description and are not intended to limit the scope of the embodiments of the present application. The sequence numbers of the above-mentioned processes do not mean the sequence of execution sequence, and the execution sequence of each process should be determined by its functions and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

Claims

An information feedback method applied to a first terminal device is characterized by comprising the following steps:

Receiving side line reference signals on M carriers, wherein M is an integer greater than or equal to 2;

acquiring side line measurement results of the M carriers according to the side line reference signals;

determining Q target carriers, wherein Q is a positive integer;

and feeding back side-row measurement results of the M carriers on the Q target carriers.
The method of claim 1, wherein the determining Q target carriers comprises:

according to the first information, Q target carriers are determined;

wherein the first information includes at least one of the following information:

the carrier wave of the sidestream reference signal or the carrier wave of the received sidestream reference signal;

priority information corresponding to a physical sidelink shared channel PSSCH associated with the sidelink reference signal;

channel occupancy;

carrier index information;

indication information of a second terminal device or indication information of the first terminal device;

carrier information corresponding to the logical channel associated with the sidestream measurement result;

carrier information corresponding to a logical channel associated with a PSSCH channel carrying side line measurement results of the M carriers;

the first terminal equipment selects carrier information for transmitting PSSCH;

The second terminal device is a terminal device sending the sidestream reference signal.
The method according to claim 1 or 2, wherein said determining Q target carriers comprises:

determining the value of Q according to the second information;

wherein the second information includes at least one of the following information:

priority information;

the indication information of the second terminal device or the indication information of the first terminal device;

configuration information sent by the network equipment;

pre-configuration information;

and the value of M is taken.
A method according to any one of claims 1 to 3, wherein feeding back side row measurements of the M carriers on the Q target carriers comprises:

and feeding back side-row measurement results of the M carriers on each of the Q target carriers.
The method according to any one of claims 1 to 4, further comprising:

determining a first time interval;

correspondingly, the feeding back the side row measurement results of the M carriers on the Q target carriers includes:

and feeding back side measurement results of the M carriers on the Q target carriers in the first time interval.
The method of claim 5, wherein the determining the first time interval comprises:

determining a second time interval of an mth carrier in the M carriers, wherein M is a positive integer less than or equal to M;

and determining the first time interval according to the overlapped part of M second time intervals of the M carriers, wherein the second time interval is determined according to time delay boundary information fed back by a side line measurement result of an mth carrier in the M carriers.
The method of claim 6, wherein the determining the second time interval for the mth carrier of the M carriers comprises:

acquiring time delay boundary information fed back by a side line measurement result of an mth carrier;

and determining a second time interval of the mth carrier according to the time delay boundary information fed back by the side line measuring result of the mth carrier and the time slot information of the side line reference signal on the mth carrier.
The method according to claim 6 or 7, wherein the overlap of M second time intervals of the M carriers is greater than or equal to a first threshold value.
The method of claim 8, wherein the first threshold value is determined based on at least one of:

The indication information of the second terminal device or the indication information of the first terminal device;

configuration information sent by the network equipment;

pre-configuration information.
The method of claim 5, wherein the determining the first time interval comprises:

determining the first time interval according to at least one of the following information:

time delay boundary information fed back by the lateral measurement result;

the earliest time slot position in the time slots of the M sidelink reference signals;

and the latest time slot position in the time slots where the M sidelink reference signals are positioned.
The method according to claim 5 or 6, wherein the determining the first time interval comprises:

according to time delay boundary information fed back by a side line measuring result of a Q-th target carrier in the Q target carriers, determining a third time interval of the Q-th target carrier, wherein Q is a positive integer smaller than or equal to Q;

determining the third time interval as the first time interval;

correspondingly, the feeding back the side row measurement results of the M carriers on the Q target carriers includes: and feeding back side-row measurement results of the M carriers on the q-th target carrier in the first time interval.
The method according to any of claims 1 to 9, wherein the side row measurements of the M carriers are carried in a control unit MAC CE of the same medium access control layer.
The method of claim 12, wherein the step of determining the position of the probe is performed,

the MAC CE further includes carrier index information corresponding to the M carriers.
The method of claim 13, wherein the MAC CE includes M information fields, each information field including carrier index information and a sidelink measurement result corresponding to one of the M carriers.
The method according to claim 13 or 14, wherein the sidestream measurement result includes a measurement result corresponding to the first measurement quantity, and the MAC CE includes first index information and M-1 differential index information, respectively;

the first index information is index information determined according to a measurement result corresponding to a first measurement quantity of a first carrier; the differential index information is determined according to the measurement result of the first carrier wave; the first carrier is a carrier having a measurement result corresponding to the highest first measurement quantity.
The method of claim 15, wherein the differential index information is differential index information determined from a measurement of the first carrier, comprising:

The differential index information is determined according to a difference between a measurement result of the other carriers than the first carrier among the M carriers and a measurement result of the first carrier.
The method of claim 15, wherein the differential index information is differential index information determined from a measurement of the first carrier, comprising:

the differential index information is determined according to a difference between indexes corresponding to measurement results of other carriers than the first carrier among the M carriers and indexes corresponding to the first index information.
The method according to any of claims 15 to 17, wherein in the MAC CE, carrier index information and side row measurement results corresponding to the first carrier precede carrier index information and side row measurement results corresponding to other carriers.
The method of claim 12, wherein the MAC CE includes N information fields, where N is a maximum number of carriers for the first terminal device and the second terminal device to perform side communication, and N is an integer greater than or equal to M.
The method of claim 19, wherein the side row measurements of the N carriers are sequentially ordered in the MAC CE in carrier index order.
The method of claim 19, wherein the N information fields and the N carriers have a first correspondence therebetween, wherein the first correspondence is predefined, or determined from pre-configuration information, or determined from network configuration information.
The method according to any one of claims 19 to 21, wherein if a second carrier of the N carriers has no sidelink measurement result, the corresponding information field of the second carrier is filled with a special symbol in the MAC CE, the special symbol being used to indicate that the information field has no bearer sidelink measurement result.
The method of claim 19, wherein the sideways measurement comprises a measurement corresponding to the first measurement, corresponding to:

the MAC CE comprises first index information and N-1 differential index information;

the first index information is index information determined according to a measurement result corresponding to a first measurement quantity of a first carrier; the differential index information is determined according to the measurement result of the first carrier wave; the first carrier is a carrier having a measurement result corresponding to the highest first measurement quantity.
The method of claim 23, wherein the differential index information is differential index information determined from a measurement of the first carrier, comprising:

the differential index information is determined according to a difference between a measurement result of the other carriers except the first carrier among the M carriers and the measurement result of the first carrier.
The method of claim 23, wherein the differential index information is differential index information determined from a measurement of the first carrier, comprising:

the differential index information is determined according to a difference between indexes corresponding to measurement results of other carriers than the first carrier among the M carriers and indexes corresponding to the first index information.
The method according to any one of claims 23 to 25, wherein the MAC CE further comprises carrier index information of the first carrier.
The method of claim 26, wherein the step of determining the position of the probe is performed,

in the MAC CE, the carrier index information and the sidelink measurement result corresponding to the first carrier are located before the sidelink measurement results corresponding to other carriers.
The method of claim 27, wherein side row measurements for N-1 carriers other than the first carrier among the N carriers are sequentially arranged in carrier index order after carrier index information and side row measurements corresponding to the first carrier.
The method according to any one of claims 23 to 28, wherein if a third carrier of the N carriers has no sidelink measurement result, the corresponding information field of the third carrier is filled with a special symbol in the MAC CE, the special symbol being used to indicate that the information field has no bearer sidelink measurement result; or the differential index information corresponding to the third carrier is an invalid index or a reserved index.
The method according to any of claims 15 to 18, 23 to 29, wherein the first measurement quantity comprises a sidelink reference signal received power, S-RSRP, or a channel quality indication, CQI.
The method according to any one of claims 1 to 30, further comprising:

receiving sidelink reference signals on K carriers;

acquiring side line measurement results of the K carriers according to the side line reference signals;

selecting M carriers from the K carriers; where K is an integer greater than or equal to M.
The method of claim 31, further comprising:

determining the value of M according to third information;

wherein the third information includes at least one of the following information:

Priority information;

the indication information of the second terminal device or the indication information of the first terminal device;

configuration information sent by the network equipment;

pre-configuration information.
The method according to claim 31 or 32, wherein said selecting said M carriers from said K carriers comprises: and selecting the M carriers from the K carriers according to the order of the priority information from high to low.
The method of claim 33, wherein the priority information is determined based on priorities of PSSCHs transmitted simultaneously with side row reference signals of the K carriers.
The method according to claim 31 or 32, characterized in that the method further comprises:

acquiring time delay boundary information fed back by a side-line measurement result of a kth carrier in the K carriers;

determining a fourth time interval corresponding to the kth carrier according to time delay boundary information fed back by the side line measurement result of the kth carrier; the fourth time interval is used for indicating a time interval for feeding back a sidestream measurement result on the kth carrier.
The method of claim 35, wherein selecting the M carriers from the K carriers comprises: and selecting M carriers according to the overlapping parts of K fourth time intervals corresponding to the K carriers, wherein the overlapping parts of the fourth time intervals corresponding to the M carriers are larger than or equal to a second threshold value.
The method of claim 36, wherein the second threshold value is determined based on at least one of:

the indication information of the second terminal device or the indication information of the first terminal device;

configuration information sent by the network equipment;

pre-configuration information.
The method according to any one of claims 1 to 37, wherein the side row reference signal is any one of the following information:

sidestream channel state information reference signal SL CSI-RS, physical sidestream shared channel demodulation reference signal PSSCH DMRS, physical sidestream control channel demodulation reference signal PSCCH DMRS.
The method of any one of claims 1 to 38, wherein the sidestream measurement result comprises at least one of the following information:

channel quality indication, CQI, rank indication, RI, precoding matrix indication, PMI, or sidelink reference signal received power, S-RSRP.
An information feedback device applied to a first terminal device, characterized in that the device comprises:

the receiving module is used for receiving the side line reference signals on M carriers, wherein M is an integer greater than or equal to 2;

the processing module is used for acquiring side line measurement results of the M carriers according to the side line reference signals;

The determining module is used for determining Q target carriers, wherein Q is a positive integer;

and the sending module is used for feeding back the side-row measurement results of the M carriers on the Q target carriers.
The apparatus of claim 40, wherein the means for determining is specifically configured to determine Q target carriers based on the first information;

wherein the first information includes at least one of the following information:

the carrier wave of the sidestream reference signal or the carrier wave of the received sidestream reference signal;

priority information corresponding to a physical sidelink shared channel PSSCH associated with the sidelink reference signal;

channel occupancy;

carrier index information;

indication information of a second terminal device or indication information of the first terminal device;

carrier information corresponding to the logical channel associated with the sidestream measurement result;

carrier information corresponding to a logical channel associated with a PSSCH channel carrying side line measurement results of the M carriers;

the first terminal equipment selects carrier information for transmitting PSSCH;

the second terminal device is a terminal device sending the sidestream reference signal.
The apparatus according to claim 40 or 41, wherein the determining module is configured to determine the value of Q based in particular on the second information;

Wherein the second information includes at least one of the following information:

priority information;

the indication information of the second terminal device or the indication information of the first terminal device;

configuration information sent by the network equipment;

pre-configuration information;

and the value of M is taken.
The apparatus according to any one of claims 40 to 42, wherein the sending module is configured to specifically feed back side row measurements of the M carriers on each of the Q target carriers.
The apparatus of any one of claims 40 to 43, wherein the means for determining is further configured to determine a first time interval;

correspondingly, the sending module is specifically configured to feed back, in the first time interval, side-row measurement results of the M carriers on the Q target carriers.
The apparatus of claim 44, wherein the determining module is specifically configured to:

determining a second time interval of an mth carrier in the M carriers, wherein M is a positive integer less than or equal to M;

and determining the first time interval according to the overlapped part of M second time intervals of the M carriers, wherein the second time interval is determined according to time delay boundary information fed back by a side line measurement result of an mth carrier in the M carriers.
The apparatus of claim 45, wherein the determining module is specifically configured to:

acquiring time delay boundary information fed back by a side line measurement result of an mth carrier;

and determining a second time interval of the mth carrier according to the time delay boundary information fed back by the side line measuring result of the mth carrier and the time slot information of the side line reference signal on the mth carrier.
The apparatus of claim 45 or 46, wherein overlapping portions of M second time intervals of the M carriers are greater than or equal to a first threshold value.
The apparatus of claim 47, wherein the first threshold value is determined based on at least one of:

the indication information of the second terminal device or the indication information of the first terminal device;

configuration information sent by the network equipment;

pre-configuration information.
The apparatus of claim 44, wherein the means for determining is configured to determine the first time interval based on at least one of:

time delay boundary information fed back by the lateral measurement result;

the earliest time slot position in the time slots of the M sidelink reference signals;

And the latest time slot position in the time slots where the M sidelink reference signals are positioned.
The apparatus according to claim 44 or 45, wherein the determining module is specifically configured to:

according to time delay boundary information fed back by a side line measuring result of a Q-th target carrier in the Q target carriers, determining a third time interval of the Q-th target carrier, wherein Q is a positive integer smaller than or equal to Q;

determining the third time interval as the first time interval;

correspondingly, the sending module is specifically configured to feed back, in the first time interval, the side measurement results of the M carriers on the q-th target carrier.
The apparatus according to any of the claims 40-48, wherein the side row measurements of the M carriers are carried in a control unit MAC CE of the same medium access control layer.
The apparatus of claim 51, wherein the MAC CE further comprises carrier index information corresponding to the M carriers.
The apparatus of claim 52, wherein the MAC CE includes M information fields, each information field including carrier index information and a sidelink measurement result corresponding to one of the M carriers.
The apparatus of claim 52 or 53, wherein the sidestream measurement result includes a measurement result corresponding to the first measurement quantity, and the MAC CE includes first index information and M-1 differential index information, respectively;

the first index information is index information determined according to a measurement result corresponding to a first measurement quantity of a first carrier; the differential index information is determined according to the measurement result of the first carrier wave; the first carrier is a carrier having a measurement result corresponding to the highest first measurement quantity.
The apparatus of claim 54, wherein the differential index information is differential index information determined from measurement results of the first carrier, comprising:

the differential index information is determined according to a difference between a measurement result of the other carriers than the first carrier among the M carriers and a measurement result of the first carrier.
The apparatus of claim 54, wherein the differential index information is differential index information determined from measurement results of the first carrier, comprising:

the differential index information is determined according to a difference between indexes corresponding to measurement results of other carriers than the first carrier among the M carriers and indexes corresponding to the first index information.
The apparatus of any one of claims 54 to 56, wherein in the MAC CE, carrier index information and sidelink measurements corresponding to the first carrier precede carrier index information and sidelink measurements corresponding to other carriers.
The apparatus of claim 51, wherein the MAC CE includes N information fields, where N is a maximum number of carriers for the first terminal device and the second terminal device to perform side communication, and N is an integer greater than or equal to M.
The apparatus of claim 58, wherein the side row measurements for the N carriers are sequentially ordered in the MAC CE in carrier index order.
The apparatus of claim 58, wherein the N information fields and the N carriers have a first correspondence therebetween, wherein the first correspondence is predefined, or determined from pre-configuration information, or determined from network configuration information.
The apparatus of any one of claims 58-60, wherein if a second carrier of the N carriers has no sidelink measurement, the second carrier fills a special symbol in a corresponding information field of the MAC CE, the special symbol being used to indicate that the information field has no bearer sidelink measurement.
The apparatus of claim 58, wherein the sideways measurement comprises a measurement corresponding to the first measurement, the corresponding: the MAC CE comprises first index information and N-1 differential index information;

the first index information is index information determined according to a measurement result corresponding to a first measurement quantity of a first carrier; the differential index information is determined according to the measurement result of the first carrier wave; the first carrier is a carrier having a measurement result corresponding to the highest first measurement quantity.
The apparatus of claim 62, wherein the differential index information is differential index information determined from measurement results of the first carrier, comprising:

the differential index information is determined according to a difference between a measurement result of the other carriers except the first carrier among the M carriers and the measurement result of the first carrier.
The apparatus of claim 62, wherein the differential index information is differential index information determined from measurement results of the first carrier, comprising:

the differential index information is determined according to a difference between indexes corresponding to measurement results of other carriers than the first carrier among the M carriers and indexes corresponding to the first index information.
The device of any one of claims 62 to 64,

the MAC CE further includes carrier index information of the first carrier.
The apparatus of claim 65, wherein the device comprises,

in the MAC CE, the carrier index information and the sidelink measurement result corresponding to the first carrier are located before the sidelink measurement results corresponding to other carriers.
The apparatus of claim 66, wherein sidelink measurements for N-1 carriers of the N carriers other than the first carrier are sequentially ordered in a carrier index order after carrier index information and sidelink measurements corresponding to the first carrier.
The apparatus of any one of claims 62 to 67, wherein if a third carrier of the N carriers has no sidelink measurement result, the corresponding information field of the third carrier in the MAC CE is filled with a special symbol, the special symbol being used to indicate that the information field has no bearer sidelink measurement result; or the differential index information corresponding to the third carrier is an invalid index or a reserved index.
The apparatus of any one of claims 54-57, 62-68, wherein the first measurement comprises a sidelink reference signal received power, S-RSRP, or a channel quality indication, CQI.
The apparatus of any one of claims 40 to 69, wherein the receiving module is further configured to receive sidelink reference signals on K carriers;

the processing module is further configured to obtain side row measurement results of the K carriers according to the side row reference signal;

the determining module is further configured to select the M carriers from the K carriers; where K is an integer greater than or equal to M.
The apparatus of claim 70, wherein the means for determining is further configured to determine the value of M based on third information;

wherein the third information includes at least one of the following information:

priority information;

the indication information of the second terminal device or the indication information of the first terminal device;

configuration information sent by the network equipment;

pre-configuration information.
The apparatus according to claim 70 or 71, wherein the determining module is specifically configured to select the M carriers from the K carriers according to a sequence of priority information from high to low.
The apparatus of claim 72, wherein the priority information is determined based on priorities of PSSCHs transmitted simultaneously with side row reference signals of the K carriers.
The apparatus of claim 70 or 71, wherein the determining module is further configured to:

acquiring time delay boundary information fed back by a side-line measurement result of a kth carrier in the K carriers;

determining a fourth time interval corresponding to the kth carrier according to time delay boundary information fed back by the side line measurement result of the kth carrier; the fourth time interval is used for indicating a time interval for feeding back a sidestream measurement result on the kth carrier.
The apparatus of claim 74, wherein the means for determining is specifically configured to select M carriers according to overlapping portions of K fourth time intervals corresponding to the K carriers, where the overlapping portions of the fourth time intervals corresponding to the M carriers are greater than or equal to a second threshold value.
The apparatus of claim 75, wherein the second threshold value is determined based on at least one of:

the indication information of the second terminal device or the indication information of the first terminal device;

configuration information sent by the network equipment;

pre-configuration information.
The apparatus according to any one of claims 40 to 76, wherein the sidelink reference signal is any one of the following information:

Sidestream channel state information reference signal SL CSI-RS, physical sidestream shared channel demodulation reference signal PSSCH DMRS, physical sidestream control channel demodulation reference signal PSCCH DMRS.
The apparatus of any one of claims 40 to 77, wherein the sidestream measurement result comprises at least one of the following information:

channel quality indication, CQI, rank indication, RI, precoding matrix indication, PMI, or sidelink reference signal received power, S-RSRP.
A terminal device, comprising: a processor, a memory, a transceiver, and a system bus;

the memory is used for storing computer execution instructions;

the processor is configured to retrieve computer instructions from the memory and execute the computer instructions to implement the method of any of the preceding claims 1 to 39.
A computer readable storage medium having stored therein computer instructions for implementing the method of any of the preceding claims 1 to 39 when said computer instructions are executed by a processor.
A computer program for implementing the method of any one of the preceding claims 1 to 39 when the computer program is executed by a processor.
A computer program product comprising a computer program for implementing the method of any of the preceding claims 1 to 39 when executed by a processor.
A chip, comprising: a processing module and a communication interface, the processing module being adapted to perform the method of any of the preceding claims 1 to 39.
A communication system, comprising: a first terminal device and a second terminal device;

the first terminal device is an information feedback apparatus according to any of the preceding claims 40 to 78.