WO2025016124A1 - Feedback information sending method, feedback information receiving method, communication nodes, and storage medium - Google Patents

Abstract

The present application discloses a feedback information sending method, a feedback information receiving method, communication nodes, and a storage medium. The feedback information sending method comprises: receiving at least one reference signal (RS) sent by a second communication node; determining a feedback resource set on the basis of first information related to the at least one RS; on the basis of second information related to each RS among the at least one RS, determining a feedback resource corresponding to each RS in the feedback resource set; and sending feedback information to the second communication node on the feedback resource.

Description

A method for sending and receiving feedback information, a communication node and a storage medium

Cross-references

This application claims priority to a Chinese patent application filed with the China Patent Office on July 18, 2023, with application number 202310884255.8 and titled “A method for sending and receiving feedback information, communication node and storage medium”. The entire contents of the application are incorporated by reference into this application.

Technical Field

The present application relates to the field of communication technology, for example, to a method for sending and receiving feedback information, a communication node and a storage medium.

Background Art

In the beam-based communication process of sidelink (SL) frequency range 2 (FR2), beam measurement and reporting are usually required to facilitate the determination of the beam pair used for communication between the transmitting user equipment (UE) and the receiving UE. The resources used for beam feedback on the SL can usually be considered in the form of a physical sidelink feedback channel (PSFCH). The traditional PSFCH uses the physical uplink control channel (PUCCH) format 0, that is, generally uses 1 physical resource block (PRB) to feedback 1 bit of information for hybrid automatic repeat request (HARQ) feedback. When the transmitting UE transmits multiple reference signals (RS) at one time, according to the traditional correspondence between PSFCH resources and data resources, the receiving UE can only determine one feedback resource and can only feedback 1 bit of information, which makes it impossible to use it for effective beam information feedback. Therefore, in SL FR2, after the receiving UE receives at least one RS (at least one RS is often associated with the same PSCCH or PSSCH), how to determine the beam feedback resource and how to further feedback the beam information to the transmitting UE is an urgent problem to be solved.

Summary of the invention

An embodiment of the present application provides a method for sending feedback information, which is applied to a first communication node, including: receiving at least one reference signal RS sent by a second communication node; determining a feedback resource set based on first information related to at least one RS; determining a feedback resource corresponding to each RS in the feedback resource set based on second information related to each RS in the at least one RS; and sending feedback information to the second communication node on the feedback resource.

An embodiment of the present application provides a method for receiving feedback information, which is applied to a second communication node, including: sending at least one reference signal RS to a first communication node; determining a feedback resource set based on first information related to at least one RS; determining a feedback resource corresponding to each RS in the feedback resource set based on fourth information related to each RS in the at least one RS; and receiving feedback information sent by the first communication node on the feedback resource.

An embodiment of the present application provides a first communication node, including: a processor; the processor is used to implement the method for sending feedback information of any of the above embodiments when executing a computer program.

An embodiment of the present application provides a second communication node, including: a processor; the processor is used to implement the feedback information receiving method of any of the above embodiments when executing a computer program.

An embodiment of the present application also provides a computer-readable storage medium storing a computer program, which implements the method of any of the above embodiments when the computer program is executed by a processor.

With regard to the above embodiments and other aspects of the present application and their implementation, further description is provided in the accompanying drawings, detailed description and claims.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic diagram of a network of an SL communication system provided by an embodiment;

FIG2 is a schematic diagram of a PSFCH resource time domain mapping provided by an embodiment;

FIG3 is a schematic diagram of a PSSCH and PSFCH feedback resource mapping provided by an embodiment;

FIG4 is a schematic flow chart of a method for sending feedback information provided by an embodiment;

FIG5 is a schematic diagram of a non-standalone RS in a data resource pool provided by an embodiment;

FIG6 is a schematic diagram of a PSSCH region including two RSs provided by an embodiment;

FIG7 is a schematic diagram of a standalone RS in an RS resource pool provided by an embodiment;

FIG8 is a time slot structure provided by an embodiment;

FIG9 is a schematic diagram of an RS time slot provided by an embodiment;

FIG10 is a schematic diagram of an RS located in an SSB slot provided by an embodiment;

FIG11 is a schematic diagram of a feedback opportunity provided by an embodiment;

FIG12 is a flow chart of a method for receiving feedback information provided by an embodiment;

FIG13 is a schematic structural diagram of a device for sending feedback information provided by an embodiment;

FIG14 is a schematic structural diagram of a device for receiving feedback information provided by an embodiment;

FIG15 is a schematic diagram of the structure of a UE provided by an embodiment.

DETAILED DESCRIPTION

It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application. The embodiments of the present application will be described in detail below in conjunction with the accompanying drawings.

With the development of wireless communication technology and the increasing demand of users for communication, in order to meet the communication needs of low latency, high reliability and high speed, the fifth generation mobile communication technology (5th Generation, 5G) has become the trend of future network development.

FIG1 is a schematic diagram of a network of an SL communication system provided by an embodiment. As shown in FIG1 , in the SL communication system, when there is a service to be transmitted between terminal devices 1 and 2, the service data between terminal devices 1 and 2 may not pass through the network side, that is, not be forwarded through the cellular link between the terminal device and the access network device, but may be directly transmitted from the source terminal device to the target terminal device through SL. This technology can reduce the burden on the cellular network, reduce the battery power consumption of user devices, and improve the robustness of the network infrastructure, and well meet the requirements of high data rate services and proximity services, and It also supports direct communication in scenarios without network coverage, and can meet special communication needs such as public safety.

SL communication is generally based on a configured or preconfigured SL communication resource pool. Based on the SL communication resource pool configuration, UE-to-UE SL communication supports unicast, multicast, and broadcast. For unicast and multicast, the current 3rd Generation Partnership Project (3GPP) protocol supports enabling HARQ feedback, where ack/nack feedback is supported for unicast, and for multicast, two modes of Nack-only feedback and ack/nack feedback for data from group members are supported.

Regardless of the feedback method, the PSFCH feedback resource corresponding to each transmitting physical sidelink shared channel (PSSCH) is uniquely determined based on the configuration and pre-configured signaling. Taking unicast as an example, assuming that SL HARQ feedback is enabled, the receiving UE will provide feedback on the uniquely determined PSFCH resource for each PSSCH transmission of the transmitter. The specific method for determining the PSFCH feedback resource is as follows:

First, the UE determines the slot where the PSFCH resource is located on the SL communication resource pool according to the configured or pre-configured PSFCH period. The feedback slot is the next PSFCH slot that meets the minimum feedback delay and is closest to the PSSCH. Figure 2 is a schematic diagram of a PSFCH resource time domain mapping provided by an embodiment. As shown in Figure 2, assuming that the PSFCH configuration period is 2 and the minimum feedback delay is 1 slot, then every 2 PSSCH time domain resources will be fixedly mapped to one PSFCH time domain resource.

Furthermore, the system maps a corresponding PSFCH feedback resource set to the receiving UE in the PSFCH slot according to the time-frequency position of the PSSCH transmission and the unicast or multicast attribute of the transmitted data. There are multiple PSFCH feedback resources in a PSFCH feedback resource set, and the feedback resource of each receiving UE is determined by the source ID of the transmitting UE and the member ID of the receiving UE. Therefore, for each transceiver link that requires feedback, the transmitting UE and the receiving UE together determine a feedback resource in a unique PSFCH resource set according to the resource pool configuration. Figure 3 is a schematic diagram of a PSSCH and PSFCH feedback resource mapping provided by an embodiment.

Considering the increase in data transmission rate on SL, 3GPP version 18 (Rel-18) launched the SL FR2 research project to conduct preliminary research on the relevant beam training and feedback process of SL unicast before, during and after link establishment. The beam training signals include sidelink-Synchronization Signal Block (S-SSB), Channel State Information-Reference Signal (CSI-RS), Demodulation Reference Signal (DMRS), etc. Beam feedback includes Media Access Control Control Element (MAC CE), PSFCH, etc. In the process of beam training before, during or after link establishment, in order to complete beam pairing, three steps are generally required:

1) The transmitting UE transmits a reference signal for beam training;

2) The receiving UE performs beam measurement and determines the transmit beam of the transmitting UE, the receive beam of the receiving UE, and may further determine the transmit beam of the receiving UE itself;

3) The receiving UE feeds back the measured beam information on the feedback resources corresponding to the transmission of the transmitting UE.

Through the above three steps, beam pairing or beam maintenance can be completed between the transmitting UE and the receiving UE. However, when the transmitting UE transmits multiple reference signals at one time, according to the traditional correspondence between PSFCH resources and data resources, the receiving UE can only determine one feedback resource and can only feedback 1 bit of information, which makes it impossible to use it for effective beam information feedback.

The method for sending and receiving feedback information provided in the present application can be applied to various wireless communication systems, such as long term evolution (LTE) system, fourth generation mobile communication technology (4G) system, 5G system, LTE and 5G hybrid architecture system, 5G New Radio (NR) system, and new communication systems that will emerge in the future development of communication, such as the sixth generation mobile communication technology (6th-generation, 6G) system, etc. It is particularly suitable for SL communication systems that are networked based on the above systems, such as the SL communication system shown in Figure 1.

The terminal device can be a device with wireless transceiver functions, which can be deployed on land (such as indoors or outdoors, handheld, wearable or vehicle-mounted, etc.); it can also be deployed on the water (such as ships, etc.); it can also be deployed in the air (such as airplanes, balloons and satellites, etc.). Some examples of terminal devices are: UE, mobile phones, mobile stations, tablet computers, laptops, ultra-mobile personal computers (UMPC), handheld computers, netbooks, personal digital assistants (PDA) and other user devices that can be connected to the Internet, or virtual reality (VR) terminals, augmented reality (AR) terminals, wireless terminals in industrial control, wireless terminals in autonomous driving, wireless terminals in remote medical, wireless terminals in smart grids, wireless terminals in transportation safety, wireless terminals in smart cities, wireless terminals in smart homes, etc., or Internet of Things nodes in the Internet of Things, or vehicle-mounted communication devices in the Internet of Vehicles, or entertainment and gaming equipment or systems, or global positioning system equipment, etc. The embodiments of the present application do not limit the specific technology and specific device form adopted by the terminal device. In addition, the terminal device can be referred to as a terminal.

Access network equipment is the access equipment that the terminal equipment uses to access the wireless communication system through wireless means. It can be a base station, an evolved NodeB (eNB or eNodeB) in Long Term Evolution advanced (LTEA), a transmission reception point (TRP), a base station or gNB in a 5G mobile communication system, a base station in a future mobile communication system, or an access node in a Wireless Fidelity (WiFi) system. The base station can include various macro base stations, micro base stations, home base stations, wireless remote stations, routers, WIFI devices, or various network-side devices such as primary cells and secondary cells, and location management function (LMF) devices. It can also be a module or unit that completes some functions of a base station, for example, it can be a centralized unit (CU) or a distributed unit (DU). The embodiments of the present application do not limit the specific technology and specific device form adopted by the access network device. In addition, the access network device can be referred to as a base station.

The core network device may include an access and mobility management network element and a session management network element. Exemplarily, the terminal device may access the core network through the access network device to achieve data transmission.

In an embodiment of the present application, a method for sending and receiving feedback information that can be operated in the above-mentioned wireless communication system is provided, a communication node and a storage medium, which can determine the feedback resources corresponding to each RS sent by the transmitting UE, and send/receive feedback information on the feedback resources, thereby improving system performance.

The subband mentioned in the following embodiments of this application may also be called a subchannel or subchannel, which refers to a group of resources in the frequency domain. In addition, the signaling of the SL UE in this application may be obtained through configuration or pre-configuration, and this application will not make further distinctions. Configuration in this application may include network configuration of a device, a device configuring another device, or pre-configuration.

The following describes the method for sending and receiving feedback information, the communication nodes and their technical effects.

FIG4 is a flow chart of a method for sending feedback information provided by an embodiment. As shown in FIG4, the method provided by this embodiment is applicable to a first communication node. The first communication node (also called the first communication node device or the first node) is a receiving UE (also called the target UE), and the second communication node (also called the second communication node device or the second node) is a transmitting UE (also called the source UE). The method includes the following steps.

S110. Receive at least one RS sent by a second communication node.

The number of RSs sent by the second communication node and received by the first communication node may be one or more. At least one RS is used for beam measurement.

S120. Determine a feedback resource set according to first information related to at least one RS.

In one embodiment, the first information related to at least one RS may include at least one of the following: the time-frequency resource position of each RS in at least one RS, the time-frequency resource position of a control channel associated with at least one RS, and the time-frequency resource position of a data channel containing at least one RS.

Accordingly, the method of “determining a feedback resource set according to first information related to at least one RS” in step S120 may include at least one of the following methods 1 to 5:

Method 1: determining a feedback resource set corresponding to each RS according to the time-frequency resource position of each RS in at least one RS;

Method 2: Determine a feedback resource set corresponding to at least one RS according to the time-frequency resource position of a control channel associated with at least one RS;

Method 3: Determine a feedback resource set corresponding to at least one RS according to the time-frequency resource position of a data channel including at least one RS;

Method 4: determining a feedback resource set corresponding to each RS in at least one RS according to a time-frequency resource position of a control channel associated with at least one RS;

Method 5: Determine a feedback resource set corresponding to each RS in at least one RS according to the time-frequency resource position of a data channel including at least one RS.

It should be noted that, for method 2, the number of control channels associated with at least one RS can be 1 or more. When the number of control channels associated with at least one RS is 1, the number of feedback resource sets corresponding to at least one RS is 1; when the number of control channels associated with at least one RS is more than one, the number of feedback resource sets corresponding to at least one RS is more than one, and the number of control channels associated with at least one RS is equal to the number of feedback resource sets corresponding to at least one RS, and one control channel corresponds to a uniquely determined feedback resource set. Therefore, the difference between method 2 and method 4 is that the feedback resource set determined by method 2 is the feedback resource set corresponding to the control channel associated with at least one RS, the number of feedback resource sets is related to the number of control channels associated with at least one RS, and the feedback resource set is related to the control channel associated with at least one RS, while the feedback resource set determined by method 4 is the feedback resource set corresponding to each RS in at least one RS, and the number of feedback resource sets is related to the number of RSs in at least one RS. The difference between method 3 and method 5 is similar to the difference between method 2 and method 4.

In one embodiment, the feedback resource set satisfies at least one of the following characteristics:

The feedback resource set and RS are located in the same Listen Before Talk (LBT) bandwidth;

The feedback resource set and the control channel associated with at least one RS are located in the same LBT bandwidth;

The feedback resource set and the data channel including at least one RS are located in the same LBT bandwidth.

Among them, the LBT bandwidth is usually 20M.

In one embodiment, for the above method 3, the data channel including at least one RS may be a PSSCH including at least one RS, and at least one RS pair is determined according to the time-frequency resource position of the data channel including at least one RS. The method for providing a corresponding feedback resource set may include the following steps a1 to a3:

Step a1. Determine the feedback resource time slot position in the time domain of the data resource pool according to the configured or pre-configured feedback time slot period, and determine the first time slot according to the time domain resource position of the PSSCH containing at least one RS. The first time slot is the first feedback resource time slot containing feedback resources that is located after the time domain resource position of the PSSCH containing at least one RS in the data resource pool and meets the processing delay.

Step a2: According to the configuration information or pre-configuration information, a number of frequency domain resource units are determined in the frequency domain of the data resource pool, and the number of frequency domain resource units are evenly distributed to each subband on each time slot associated with the feedback resource time slot in the data resource pool, and each subband on each time slot associated with the feedback resource time slot corresponds to at least one frequency domain resource unit.

Step a3: determine a target subband according to the frequency domain resource position of the PSSCH containing at least one RS, and use at least one frequency domain resource unit corresponding to the target subband in the first time slot as a feedback resource set.

In another embodiment, for the above-mentioned method 3, the data channel containing at least one RS may be a PSSCH containing at least one RS, and according to the time-frequency resource position of the data channel containing at least one RS, the method for determining the feedback resource set corresponding to at least one RS may be: using the PSFCH resource set corresponding to the time-frequency resource position of the data channel containing at least one RS as the feedback resource set.

In one embodiment, for the above method 2, at least one RS-associated control channel may be at least one RS-associated physical sidelink control channel (PSCCH), and according to the time-frequency resource position of at least one RS-associated control channel, the method for determining the feedback resource set corresponding to at least one RS may include the following steps b1 to b3:

Step b1. Determine the feedback resource time slot position in the time domain of the RS resource pool according to the configured or pre-configured feedback time slot period, and determine the second time slot according to the time domain resource position of at least one RS-associated physical side link control channel PSCCH. The second time slot is the first feedback resource time slot containing feedback resources that is located after the time domain resource position of at least one RS-associated PSCCH in the RS resource pool and meets the processing delay.

Step b2: According to the configuration information or pre-configuration information, a number of frequency domain resource units are determined in the frequency domain of the RS resource pool, and the number of frequency domain resource units are evenly distributed to each PSCCH on each time slot associated with the feedback resource time slot in the RS resource pool, and each PSCCH on each time slot associated with the feedback resource time slot corresponds to at least one frequency domain resource unit.

Step b3: According to the frequency domain resource position of the PSCCH associated with at least one RS, at least one frequency domain resource unit corresponding to the second time slot is used as a feedback resource set.

In another embodiment, for the above method 2, the method for determining the feedback resource set corresponding to at least one RS according to the time-frequency resource position of the control channel associated with at least one RS may include the following steps c1 to c4:

Step c1. According to a specific synchronization signal block occasion SSB occasion and the third information, determine K consecutive RS time slots, each of the K RS time slots includes J PSCCHs, each PSCCH is associated with at least one RS resource, and the third information includes at least one of the following information: a configured or preconfigured RS time slot offset, the number of consecutive RS time slots, the number of consecutive RS symbols, a starting RS symbol position, a starting RS time slot position, a starting frequency domain position of an RS resource, a frequency domain bandwidth of an RS resource, and a frequency domain comb of an RS resource.

Step c2: Determine M consecutive feedback resource time slots according to the configured or pre-configured feedback time slot offset, wherein the initial time slot positions of the M consecutive feedback resource time slots are based on the time domain position of the specific SSB occasion and the first time slot. The initial time slot position of the consecutive M feedback resource time slots is determined according to the time domain position of the RS time slot determined according to the specific SSB occasion and the second time slot offset; each feedback resource time slot in the consecutive M feedback resource time slots includes N feedback opportunities.

Step c3: According to the configuration information or pre-configuration information, determine the P frequency domain resource units corresponding to each feedback opportunity in the frequency domain, and evenly distribute the M*N*P frequency domain resource units to the PSCCH of each time slot in the consecutive K RS time slots, and each PSCCH corresponds to at least one frequency domain resource unit.

Step c4: According to the frequency domain resource position of the PSCCH associated with at least one RS, at least one frequency domain resource unit corresponding to the PSCCH is used as a feedback resource set, where K, J, M, N, and P are all positive integers.

In one embodiment, for the above method 1, according to the time-frequency resource position of each RS in at least one RS, the method for determining the feedback resource set corresponding to each RS may include the following steps d1 to d4:

Step d1. Determine the time-frequency resource position of the RS resource according to a specific SSB occasion, and determine the time-domain resource index and frequency-domain resource index of each RS resource according to at least one of the configured or pre-configured number of consecutive RS symbols, the starting RS symbol position, the starting frequency-domain position of the RS resource, the RS resource frequency-domain bandwidth, and the RS resource frequency-domain comb.

Step d2: Determine M consecutive feedback resource time slots based on the configured or preconfigured feedback time slot offset, wherein the initial time slot positions of the M consecutive feedback resource time slots are determined based on the time domain position of a specific SSB occasion and the third time slot offset, and each of the M consecutive feedback resource time slots contains N feedback opportunities.

Step d3: According to the configuration information or pre-configuration information, determine P frequency domain resource units corresponding to each feedback opportunity in the frequency domain, and evenly distribute the M*N*P frequency domain resource units to each RS resource determined according to the specific SSB occasion, and each RS corresponds to at least one frequency domain resource unit.

Step d4: use at least one frequency domain resource unit corresponding to the time-frequency resource position of each RS as a feedback resource set, where M, N, and P are all positive integers.

In the present application, a specific SSB occasion can be determined based on the SSB occasion configured or pre-configured on the side link and the bitmap mapping method, or it can be determined based on the SSB occasion configured or pre-configured on the side link and the configured or pre-configured signaling. The embodiments of the present application do not impose specific restrictions on this.

S130. Determine, according to second information related to each RS in the at least one RS, a feedback resource corresponding to each RS in a feedback resource set.

In one embodiment, the second information includes at least one of the following: a source identification ID carried by the RS, a target address ID carried by the RS, a source ID indicated by a physical side link control channel PSCCH associated with the RS, a target address ID indicated by the PSCCH associated with the RS, an index of the RS indicated by the PSCCH associated with the RS, a relative index of the RS among all RSs indicated by the PSCCH associated with the RS, an index of the RS among all RSs corresponding to the associated PSCCH, an RSRP index corresponding to a reference signal receiving power (RSRP) on the RS, and an SINR index corresponding to a signal to interference plus noise ratio (SINR) on the RS.

In the present application, the RSRP index can be determined according to the system configuration, pre-configuration or pre-defined RSRP quantization interval. For example, -inf to -100dbm corresponds to index 0, -100dbm to -80dbm corresponds to index 1, -80 to inf corresponds to index 2, and when the measured RSRP is -90dbm, the index is 1. Similarly, the SINR index can be determined according to the system configuration, pre-configuration or pre-defined SINR quantization interval. Compared with the determination method of the RSRP index, the only difference is that the unit of SINR is db, and the unit of RSRP is dbm.

Example 1: In the data resource pool, the RS used for beam training is in the PSSCH area in the slot. The RS transmission will be Accompanied by PSSCH, and the bandwidth of RS is the same as PSSCH, that is, RS in this scenario can be called non-standalone RS. Fig. 5 is a schematic diagram of a non-standalone RS in a data resource pool provided by an embodiment.

As shown in Figure 5, the period of the data resource pool PSFCH feedback resource is 2, the frequency domain is 2 sub-bands, and the PSSCH area of each sub-band in each time slot is accompanied by one or more RSs for beam training. Figure 6 is a schematic diagram of a PSSCH area including 2 RSs provided by an embodiment.

For the time domain of the data resource pool, the feedback resource time slot position is determined in the time domain of the data resource pool according to the configured or pre-configured feedback time slot period, and the first time slot is determined according to the time domain resource position of the PSSCH containing at least one RS, the first time slot is the first feedback resource time slot containing feedback resources that is located after the time domain resource position of the PSSCH containing at least one RS in the data resource pool and meets the processing delay.

For the frequency domain of the data resource pool, according to the configuration information or pre-configuration information, determine the frequency domain of the data resource pool. PRBs, the data resource pool includes N _subch subbands, and the PSFCH resource period in the data resource pool is Then every less than or equal to Each slot will be associated with one PSFCH feedback opportunity. of the PRBs PRBs are allocated to subband j on time slot i in the data resource pool that is associated with the PSFCH feedback resource time slot, And the allocation rule is to allocate in ascending order of i first and then in ascending order of j.

Then, according to the number of subbands occupied by the received PSSCH data Number of cyclic shift pairs configured in the system The PSFCH candidate resource type determines the number of available candidate PSFCH resources, that is, the number of feedback resources included in the feedback resource set. For example, the number of available candidate PSFCH resources Or the number of available candidate PSFCH resources The PSFCH feedback resources are sorted in the order of frequency domain first and then code domain.

Finally, according to the second information related to each RS in the at least one RS, The index of the feedback resource corresponding to each RS is determined in the feedback resources: Wherein, P _ID is the source ID indicated on the received SCI of the scheduled PSSCH. M _ID is the index of each RS associated with the received PSCCH or PSSCH. When N reference signals are associated with the PSCCH or PSSCH (beam index is 0 to N-1), the UE can determine 1 corresponding feedback resource for each reference signal (each beam); or, M _ID refers to the relative index of the reference signal indicated in the received SCI of the scheduled PSSCH. When the SCI indicates N' reference signals, the UE can determine 1 corresponding feedback resource for each reference signal (each beam).

Alternatively, according to the second information related to each RS in the at least one RS, in the feedback resource set The index of the feedback resource corresponding to each RS is determined according to the source ID, the destination ID, the M _ID and at least one of the energy range index corresponding to the RSRP, such as Wherein, V _RSRP represents the energy index when the beam index is M _ID , and D _ID is the target address ID indicated on the SCI of the received scheduling PSSCH or RS.

It should be noted that the index of RS in the present application can be an absolute index or a relative index. For example, PSCCH or PSSCH is associated with 4 beam RS indexes, recorded as RS1, RS2, RS3, RS4, and the numbers can be recorded as 0, 1, 2, 3. In one transmission, the UE may transmit part of the RS. Assuming that the UE actually only transmits RS1 and RS3, if the absolute index is used, then when the UE determines the resource, the index of beam RS1 corresponds to M _ID 0, and the index of beam RS2 corresponds to M _ID 2. If the relative index is used, then when the UE determines the resource, the index of beam RS is determined according to the number of RS actually transmitted, that is, the index of beam RS1 corresponds to M _ID 0, and the index of beam RS1 corresponds to M _ID 1.

Example 2: When the RS resource pool is configured or preconfigured, the frequency domain of the RS resource pool is divided into at least one frequency domain unit, and the time domain is configured or preconfigured with multiple slots within the system vibration period. In this scenario, the RS can be called a standalone RS, and the transmission of the RS has nothing to do with the PSSCH. The RS resource pool is not in the SL data resource pool. Figure 7 is a schematic diagram of a standalone RS in an RS resource pool provided by an embodiment.

As shown in FIG7 , the period of the PSFCH feedback resource is 2, that is, in the RS resource pool, there is one PSFCH transmission opportunity for every 2 RS slots. In a time slot, FIG8 is a time slot structure provided by an embodiment. As shown in FIG8 , the PSCCH channel and RS signal in the slot are time-divided, and different PSCCH channels are frequency-divided. One PSCCH resource corresponds to four RS resources (RS1 to RS4) in a time slot.

For the time domain of the RS resource pool, the feedback resource time slot position is determined in the time domain of the RS resource pool according to the configured or pre-configured feedback time slot period, and the second time slot is determined according to the time domain resource position of at least one RS-associated physical side link control channel PSCCH, the second time slot is the first feedback resource time slot containing feedback resources that is located after the time domain resource position of at least one RS-associated PSCCH in the RS resource pool and meets the processing delay.

For the frequency domain of the RS resource pool, according to the configuration information or pre-configuration information, the frequency domain of the RS resource pool is determined PRBs, the frequency domain of the RS resource pool includes N _PSCCH PSCCH channels, and the PSFCH resource period in the RS resource pool is Then one PSFCH feedback opportunity on the RS resource pool will be associated or less than RS time slots. of the PRBs PRBs are allocated to PSCCH j on time slot i associated with the PSFCH feedback resource time slot in the RS resource pool, And the allocation rule is to allocate in ascending order of i first and then in ascending order of j.

Then according to the number of cyclic shift pairs configured by the system Determine the number of available candidate PSFCH resources, that is, the number of feedback resources included in the feedback resource set. For example, the number of available candidate PSFCH resources The PSFCH feedback resources are sorted in the order of frequency domain first and then code domain.

Finally, according to the second information related to each RS in the at least one RS, The index of the feedback resource corresponding to each RS is determined in the feedback resources: Wherein, P _ID is the source ID indicated on the SCI of the received scheduling PSSCH. M _ID is the index of each RS associated with the received PSCCH. When the PSCCH is associated with N reference signals, the UE can determine 1 corresponding feedback resource for each reference signal (each beam); or, M _ID refers to the relative index of the reference signal indicated in the SCI of the received PSCCH. When the SCI indicates N' reference signals, the UE can determine 1 corresponding feedback resource for each reference signal (each beam).

Example 3: RS time slot is determined according to SSB slot. Each SSB slot in the system frame period can determine K consecutive RS slots or RS slots with fixed gaps according to system configuration or pre-configuration. The timing of the feedback resources corresponding to the RS resources on the K RS time slots is determined according to the last time slot of the K RS time slots and a time slot offset. The RS time slot includes two parts, PSCCH and RS, which are time-divided.

FIG9 is a schematic diagram of an RS time slot provided by an embodiment. As shown in FIG9, a PSFCH feedback time slot is associated with K RS time slots, and one RS time slot includes N PSCCH channels, which are determined in the frequency domain according to configuration or pre-configuration information. PRBs, determined in the time domain within a time slot feedback opportunity. of the PRBs PRBs are allocated to PSCCH j on time slot i associated with the PSFCH feedback opportunity, And the allocation rule is to allocate in ascending order of i first and then in ascending order of j.

Furthermore, according to the number of cyclic shift pairs configured in the system Determine the number of available candidate PSFCH resources, that is, the number of feedback resources included in the feedback resource set. For example, the number of available candidate PSFCH resources The PSFCH feedback resources are sorted in the order of frequency domain first and then code domain.

Finally, according to the second information related to each RS in the at least one RS, The index of the feedback resource corresponding to each RS is determined in the feedback resources: Wherein, P _ID is the source ID indicated on the SCI of the received scheduling PSSCH. M _ID is the index of each RS associated with the received PSCCH. When the PSCCH is associated with N reference signals, the UE can determine 1 corresponding feedback resource for each reference signal (each beam); or, M _ID refers to the relative index of the reference signal indicated in the SCI of the received PSCCH. When the SCI indicates N' reference signals, the UE can determine 1 corresponding feedback resource for each reference signal (each beam).

Example 4, FIG. 10 is a schematic diagram of an RS located in an SSB slot provided by an embodiment. FIG. 11 is a schematic diagram of a feedback opportunity provided by an embodiment. As shown in FIG. 10 and FIG. 11, after the time slot offset time offset configured by the system after the SSB, is the time slot where the PSFCH feedback opportunity on the SSB slot is located.

There are N RS resources in the SSB slot, and the PSFCH feedback slot is associated with 1 SSB slot, which is determined in the frequency domain according to the configuration or pre-configuration information. PRBs, determined in the time domain within a time slot feedback opportunities, as shown in Figure 11 At this time of the PRBs PRBs are allocated to RS j on time slot i associated with the PSFCH feedback opportunity,

Furthermore, according to the number of cyclic shift pairs configured in the system Determine the number of available candidate PSFCH resources, that is, the number of feedback resources included in the feedback resource set. For example, the number of available candidate PSFCH resources The PSFCH feedback resources are sorted in the order of frequency domain first and then code domain.

Finally, according to the second information related to each RS in the at least one RS, The index of the feedback resource corresponding to each RS is determined in the feedback resources: Among them, P _ID is the source ID carried on the received RS, and each UE can uniquely determine a PSFCH feedback resource for beam information feedback based on the received RS information.

Alternatively, according to the second information related to each RS in the at least one RS, in the feedback resource set The index of the feedback resource corresponding to each RS is determined in the feedback resources: Among them, P _ID is the source ID carried on the received RS, and some indexes corresponding to the RSRP range are configured or pre-configured or pre-defined, for example, RSRP>0 corresponds to index 1, RSRP≤0 corresponds to index 0, and M _ID is the received RSRP range index. Each UE can uniquely determine a PSFCH feedback resource for beam information feedback based on the received RS information.

S140. Send feedback information to the second communication node on the feedback resource.

In one embodiment, the method of sending feedback information to the second communication node on the feedback resource may include: measuring RSRP according to the RS or measuring SINR according to the RS to determine the measurement result; sending feedback information to the second communication node on the feedback resource, the feedback information including the measurement result. Generally, the feedback information occupies 1 bit.

The first communication node may send feedback information to the second communication node on the feedback resource corresponding to the RS whose RSRP is greater than the preset threshold; or send feedback information to the second communication node on the feedback resource corresponding to the RS whose SINR is greater than the preset threshold; or send feedback information to the second communication node on the feedback resource corresponding to the RS with the largest RSRP. Information; or, sending feedback information to the second communication node on the feedback resource corresponding to the RS with the largest SINR.

In one embodiment, the transmit beam used by the first communication node to send the feedback information is the transmit beam corresponding to the receive beam of the PSCCH associated with the RS;

Alternatively, the transmit beam used by the first communication node to send the feedback information is a transmit beam corresponding to a receive beam of a physical side link shared channel PSSCH including the RS;

Alternatively, the transmission beam used by the first communication node to send feedback information is a transmission beam that can spatially cover the receiving beams of each RS that needs to be fed back simultaneously.

FIG12 is a flow chart of a method for receiving feedback information provided by an embodiment. As shown in FIG12, the method provided by this embodiment is applicable to a second communication node. In this example, the first communication node (also referred to as a first communication node device or a first node) is a receiving UE (also referred to as a target UE), and the second communication node (also referred to as a second communication node device or a second node) is a transmitting UE (also referred to as a source UE). The method includes the following steps.

S210. Send at least one RS to the first communication node.

The number of RSs sent by the second communication node to the first communication node may be one or more. At least one RS is used by the first communication node to perform beam measurement.

S220. Determine a feedback resource set according to first information related to at least one RS.

In one embodiment, the first information related to at least one RS may include at least one of the following: the time-frequency resource position of each RS in at least one RS, the time-frequency resource position of a control channel associated with at least one RS, and the time-frequency resource position of a data channel containing at least one RS.

Accordingly, the method of “determining a feedback resource set according to first information related to at least one RS” in step S220 may include at least one of the following methods 1 to 5:

Method 1: determining a feedback resource set corresponding to each RS according to the time-frequency resource position of each RS in at least one RS;

Method 2: Determine a feedback resource set corresponding to at least one RS according to the time-frequency resource position of a control channel associated with at least one RS;

Method 3: Determine a feedback resource set corresponding to at least one RS according to the time-frequency resource position of a data channel including at least one RS;

Method 4: determining a feedback resource set corresponding to each RS in at least one RS according to a time-frequency resource position of a control channel associated with at least one RS;

Method 5: Determine a feedback resource set corresponding to each RS in at least one RS according to the time-frequency resource position of a data channel including at least one RS.

It should be noted that, for method 2, the number of control channels associated with at least one RS can be one or more. When the number of control channels associated with at least one RS is one, the number of feedback resource sets corresponding to at least one RS is one; when the number of control channels associated with at least one RS is more than one, the number of feedback resource sets corresponding to at least one RS is more than one, and the number of control channels associated with at least one RS is equal to the number of feedback resource sets corresponding to at least one RS, and one control channel corresponds to a uniquely determined feedback resource set. Therefore, the difference between method 2 and method 4 is that the feedback resource set determined by method 2 is the feedback resource set corresponding to the control channel associated with at least one RS, and the number of feedback resource sets is related to the number of control channels associated with at least one RS. The feedback resource set is related to the control channel associated with at least one RS, and the feedback resource set determined by method 4 is a feedback resource set corresponding to each RS in at least one RS, and the number of feedback resource sets is related to the number of RSs in at least one RS. The difference between method 3 and method 5 is similar to the difference between method 2 and method 4.

In one embodiment, the feedback resource set satisfies at least one of the following characteristics:

The feedback resource set and RS are located in the same Listen Before Talk (LBT) bandwidth;

The feedback resource set and the control channel associated with at least one RS are located in the same LBT bandwidth;

The feedback resource set and the data channel including at least one RS are located in the same LBT bandwidth.

Among them, the LBT bandwidth is usually 20M.

In one embodiment, for the above method 3, the data channel including at least one RS may be a PSSCH including at least one RS, and according to the time-frequency resource position of the data channel including at least one RS, the method for determining the feedback resource set corresponding to the at least one RS may include the following steps a1 to a3:

Step a1. Determine the feedback resource time slot position in the time domain of the data resource pool according to the configured or pre-configured feedback time slot period, and determine the first time slot according to the time domain resource position of the PSSCH containing at least one RS. The first time slot is the first feedback resource time slot containing feedback resources that is located after the time domain resource position of the PSSCH containing at least one RS in the data resource pool and meets the processing delay.

Step a2: According to the configuration information or pre-configuration information, a number of frequency domain resource units are determined in the frequency domain of the data resource pool, and the number of frequency domain resource units are evenly distributed to each subband on each time slot associated with the feedback resource time slot in the data resource pool, and each subband on each time slot associated with the feedback resource time slot corresponds to at least one frequency domain resource unit.

Step a3: determine a target subband according to the frequency domain resource position of the PSSCH containing at least one RS, and use at least one frequency domain resource unit corresponding to the target subband in the first time slot as a feedback resource set.

In another embodiment, for the above-mentioned method 3, the data channel containing at least one RS may be a PSSCH containing at least one RS, and according to the time-frequency resource position of the data channel containing at least one RS, the method for determining the feedback resource set corresponding to at least one RS may be: using the PSFCH resource set corresponding to the time-frequency resource position of the data channel containing at least one RS as the feedback resource set.

In one embodiment, for the above method 2, at least one RS-associated control channel may be at least one RS-associated physical sidelink control channel (PSCCH), and according to the time-frequency resource position of at least one RS-associated control channel, the method for determining the feedback resource set corresponding to at least one RS may include the following steps b1 to b3:

Step b1. Determine the feedback resource time slot position in the time domain of the RS resource pool according to the configured or pre-configured feedback time slot period, and determine the second time slot according to the time domain resource position of at least one RS-associated physical side link control channel PSCCH. The second time slot is the first feedback resource time slot containing feedback resources that is located after the time domain resource position of at least one RS-associated PSCCH in the RS resource pool and meets the processing delay.

Step b2: According to the configuration information or pre-configuration information, a number of frequency domain resource units are determined in the frequency domain of the RS resource pool, and the number of frequency domain resource units are evenly distributed to each PSCCH on each time slot associated with the feedback resource time slot in the RS resource pool, and each PSCCH on each time slot associated with the feedback resource time slot corresponds to at least one frequency domain resource unit.

Step b3: according to the frequency domain resource position of the PSCCH associated with at least one RS, at least A frequency domain resource unit is used as a feedback resource set.

In another embodiment, for the above method 2, the method for determining the feedback resource set corresponding to at least one RS according to the time-frequency resource position of the control channel associated with at least one RS may include the following steps c1 to c4:

Step c1. According to a specific synchronization signal block occasion SSB occasion and the third information, determine K consecutive RS time slots, each of the K RS time slots includes J PSCCHs, each PSCCH is associated with at least one RS resource, and the third information includes at least one of the following information: a configured or preconfigured RS time slot offset, the number of consecutive RS time slots, the number of consecutive RS symbols, a starting RS symbol position, a starting RS time slot position, a starting frequency domain position of an RS resource, a frequency domain bandwidth of an RS resource, and a frequency domain comb of an RS resource.

Step c2, based on the configured or preconfigured feedback time slot offset, determine M consecutive feedback resource time slots, the initial time slot positions of the M consecutive feedback resource time slots are determined based on the time domain position of a specific SSB occasion and the first time slot offset, or the initial time slot positions of the M consecutive feedback resource time slots are determined based on the time domain position of the RS time slot determined based on the specific SSB occasion and the second time slot offset; each of the M consecutive feedback resource time slots contains N feedback opportunities.

Step c3: According to the configuration information or pre-configuration information, determine the P frequency domain resource units corresponding to each feedback opportunity in the frequency domain, and evenly distribute the M*N*P frequency domain resource units to the PSCCH of each time slot in the consecutive K RS time slots, and each PSCCH corresponds to at least one frequency domain resource unit.

Step c4: According to the frequency domain resource position of the PSCCH associated with at least one RS, at least one frequency domain resource unit corresponding to the PSCCH is used as a feedback resource set, where K, J, M, N, and P are all positive integers.

In one embodiment, for the above method 1, according to the time-frequency resource position of each RS in at least one RS, the method for determining the feedback resource set corresponding to each RS may include the following steps d1 to d4:

Step d1. Determine the time-frequency resource position of the RS resource according to a specific SSB occasion, and determine the time-domain resource index and frequency-domain resource index of each RS resource according to at least one of the configured or pre-configured number of consecutive RS symbols, the starting RS symbol position, the starting frequency-domain position of the RS resource, the RS resource frequency-domain bandwidth, and the RS resource frequency-domain comb.

Step d2: Determine M consecutive feedback resource time slots based on the configured or preconfigured feedback time slot offset, wherein the initial time slot positions of the M consecutive feedback resource time slots are determined based on the time domain position of a specific SSB occasion and the third time slot offset, and each of the M consecutive feedback resource time slots contains N feedback opportunities.

Step d3: According to the configuration information or pre-configuration information, determine P frequency domain resource units corresponding to each feedback opportunity in the frequency domain, and evenly distribute the M*N*P frequency domain resource units to each RS resource determined according to the specific SSB occasion, and each RS corresponds to at least one frequency domain resource unit.

Step d4: use at least one frequency domain resource unit corresponding to the time-frequency resource position of each RS as a feedback resource set, where M, N, and P are all positive integers.

In the present application, a specific SSB occasion can be determined based on the SSB occasion configured or pre-configured on the side link and the bitmap mapping method, or it can be determined based on the SSB occasion configured or pre-configured on the side link and the configured or pre-configured signaling. The embodiments of the present application do not impose specific restrictions on this.

S230. Determine, according to fourth information related to each RS in the at least one RS, a feedback resource corresponding to each RS in a feedback resource set.

In one embodiment, the fourth information includes at least one of the following: a source identification ID carried by the RS, a target address ID carried by the RS, a source ID indicated by a physical side link control channel PSCCH associated with the RS, and a source ID indicated by a PSCCH associated with the RS. Target address ID, index of RS indicated by PSCCH associated with RS, relative index of RS among all RS indicated by PSCCH associated with RS, index of RS among all RS corresponding to associated PSCCH, quantization interval index of reference signal received power RSRP configured, preconfigured or predefined by the system, quantization interval index of signal to interference plus noise ratio SINR configured, preconfigured or predefined by the system.

S240. Receive feedback information sent by the first communication node on the feedback resource.

In one embodiment, the feedback information includes a measurement result, where the measurement result is determined by the first communication node based on RS measurement of RSRP, or the measurement result is determined by the first communication node based on RS measurement of SINR.

In one embodiment, the method for receiving feedback information sent by the first communication node on the feedback resource may include:

When there is a system-configured, pre-configured or pre-defined RSRP quantization interval index, feedback information corresponding to each RSRP energy index corresponding to each RS resource sent by the first communication node is received on the feedback resource determined by each RSRP energy index corresponding to the RS resource;

Alternatively, when there is a system-configured, pre-configured or pre-defined SINR quantization interval index, feedback information corresponding to each RSRP energy index corresponding to each RS resource sent by the first communication node is received on the feedback resource determined by each RSRP energy index corresponding to the RS;

Alternatively, when a system-configured, pre-configured or pre-defined RSRP quantization interval index exists and is enabled, feedback information corresponding to each RSRP energy index corresponding to each RS resource sent by the first communication node is received on a feedback resource determined by each RSRP energy index corresponding to the RS resource;

Alternatively, when a system-configured, pre-configured or pre-defined SINR quantization interval index exists and is enabled, feedback information corresponding to each SINR energy index corresponding to each RS resource sent by the first communication node is received on a feedback resource determined by each SINR energy index corresponding to the RS;

Alternatively, when there is no RSRP quantization interval index configured, preconfigured, or predefined by the system but not enabled, feedback information corresponding to each RS sent by the first communication node is received on the feedback resource corresponding to the RS;

Alternatively, when a system-configured, pre-configured or pre-defined SINR quantization interval index does not exist or exists but is not enabled, feedback information corresponding to each RS sent by the first communication node is received on the feedback resource corresponding to the RS.

The method for sending and receiving the feedback information described above in the present application can determine the feedback resources corresponding to each RS sent by the transmitting UE, and send/receive feedback information on the feedback resources, thereby improving system performance.

FIG13 is a schematic structural diagram of a device for sending feedback information provided by an embodiment. The device may be configured in a first communication node. As shown in FIG13 , the device includes: a receiving module 10 , a determining module 11 and a sending module 12 .

The receiving module 10 is configured to receive at least one reference signal RS sent by the second communication node; the determining module 11 is configured to determine a feedback resource set based on first information related to at least one RS; and determine the feedback resource corresponding to each RS in the feedback resource set based on second information related to each RS in the at least one RS; the sending module 12 is configured to send feedback information to the second communication node on the feedback resource.

The device for sending feedback information provided in this embodiment is to implement the method for sending feedback information in the embodiment shown in FIG. 4 . The implementation principle and technical effect of the device for sending feedback information provided in this embodiment are similar to those of the above embodiment and will not be described in detail here.

In one embodiment, the determination module 11 is configured to perform at least one of the following methods: determining a feedback resource set corresponding to each RS according to the time-frequency resource position of each RS in at least one RS; determining a feedback resource set corresponding to each RS according to at least one RS Determine the feedback resource set corresponding to at least one RS according to the time-frequency resource position of the associated control channel; determine the feedback resource set corresponding to at least one RS according to the time-frequency resource position of the data channel containing at least one RS; determine the feedback resource set corresponding to each RS in at least one RS according to the time-frequency resource position of the control channel associated with at least one RS; determine the feedback resource set corresponding to each RS in at least one RS according to the time-frequency resource position of the data channel containing at least one RS.

In one embodiment, the feedback resource set satisfies at least one of the following characteristics:

The feedback resource set and RS are located in the same listen-before-transmit LBT bandwidth;

The feedback resource set and the control channel associated with at least one RS are located in the same LBT bandwidth;

The feedback resource set and the data channel including at least one RS are located in the same LBT bandwidth.

In one embodiment, the determination module 11 is configured to determine the feedback resource time slot position in the time domain of the data resource pool according to a configured or pre-configured feedback time slot period, and determine the first time slot according to the time domain resource position of the physical side link shared channel PSSCH containing at least one RS, the first time slot being the first feedback resource time slot containing feedback resources that is located after the time domain resource position of the PSSCH containing at least one RS in the data resource pool and meets the processing delay; according to the configuration information or the pre-configuration information, determine a number of frequency domain resource units in the frequency domain of the data resource pool, and evenly distribute the number of frequency domain resource units to each subband on each time slot associated with the feedback resource time slot in the data resource pool, and each subband on each time slot associated with the feedback resource time slot corresponds to at least one frequency domain resource unit; according to the frequency domain resource position of the PSSCH containing at least one RS, determine the target subband, and use at least one frequency domain resource unit corresponding to the target subband in the first time slot as the feedback resource set; or, the determination module 11 is configured to use the PSFCH resource set corresponding to the time-frequency resource position of the data channel containing at least one RS as the feedback resource set.

In one embodiment, the determination module 11 is configured to determine the feedback resource time slot position in the time domain of the RS resource pool according to a configured or pre-configured feedback time slot period, and determine the second time slot according to the time domain resource position of at least one RS-associated physical side link control channel PSCCH, the second time slot being the first feedback resource time slot containing feedback resources that is located after the time domain resource position of at least one RS-associated PSCCH in the RS resource pool and meets the processing delay; determine a number of frequency domain resource units in the frequency domain of the RS resource pool according to the configuration information or pre-configuration information, and evenly distribute the number of frequency domain resource units to each PSCCH on each time slot associated with the feedback resource time slot in the RS resource pool, and each PSCCH on each time slot associated with the feedback resource time slot corresponds to at least one frequency domain resource unit; according to the frequency domain resource position of at least one RS-associated PSCCH, use at least one frequency domain resource unit corresponding to the second time slot as a feedback resource set.

In one embodiment, the determination module 11 is configured to determine K consecutive RS time slots according to a specific synchronization signal block occasion SSB occasion and third information, each of the K RS time slots includes J PSCCHs, each PSCCH is associated with at least one RS resource, and the third information includes at least one of the following information: a configured or preconfigured RS time slot offset, a continuous number of RS time slots, a continuous number of RS symbols, a starting RS symbol position, a starting RS time slot position, a starting frequency domain position of an RS resource, a frequency domain bandwidth of an RS resource, and a frequency domain comb of an RS resource; according to the configured or preconfigured feedback time slot offset, determine M consecutive feedback resource time slots, the initial time slot position of the M consecutive feedback resource time slots is determined according to the time domain position of the specific SSB occasion and the first time slot offset, or the initial time slot position of the M consecutive feedback resource time slots is determined according to the specific SSB occasion. The time domain position of the RS time slot determined by the first occasion and the second time slot offset are determined; each feedback resource time slot in the continuous M feedback resource time slots includes N feedback opportunities; and P frequency slots corresponding to each feedback opportunity are determined in the frequency domain according to the configuration information or the pre-configuration information. domain resource unit, and evenly distribute M*N*P frequency domain resource units to the PSCCH of each time slot in K consecutive RS time slots, each PSCCH corresponds to at least one frequency domain resource unit; according to the frequency domain resource position of the PSCCH associated with at least one RS, at least one frequency domain resource unit corresponding to the PSCCH is used as a feedback resource set, and K, J, M, N, and P are all positive integers.

In one embodiment, the determination module 11 is configured to determine the time-frequency resource position of the RS resource according to a specific SSB occasion, and determine the time domain resource index and the frequency domain resource index of each RS resource according to at least one of the configured or pre-configured number of consecutive RS symbols, the starting RS symbol position, the starting frequency domain position of the RS resource, the frequency domain bandwidth of the RS resource, and the frequency domain comb of the RS resource; determine M consecutive feedback resource time slots according to the configured or pre-configured feedback time slot offset, the initial time slot position of the M consecutive feedback resource time slots is determined according to the time domain position of the specific SSB occasion and the third time slot offset, and each feedback resource time slot of the M consecutive feedback resource time slots contains N feedback opportunities; determine P frequency domain resource units corresponding to each feedback opportunity in the frequency domain according to the configuration information or the pre-configuration information, and evenly distribute the M*N*P frequency domain resource units to each RS resource determined according to the specific SSB occasion, and each RS corresponds to at least one frequency domain resource unit; take at least one frequency domain resource unit corresponding to the time-frequency resource position of each RS as a feedback resource set, and M, N, and P are all positive integers.

In one embodiment, the second information includes at least one of the following: a source identification ID carried by the RS, a target address ID carried by the RS, a source ID indicated by a physical side link control channel PSCCH associated with the RS, a target address ID indicated by the PSCCH associated with the RS, an index of the RS indicated by the PSCCH associated with the RS, a relative index of the RS among all RSs indicated by the PSCCH associated with the RS, an index of the RS among all RSs corresponding to the associated PSCCH, an RSRP index corresponding to a reference signal received power on the RS, and an SINR index corresponding to a signal to interference plus noise ratio on the RS.

In one embodiment, the sending module 12 is configured to determine a measurement result based on RS measurement of RSRP or based on RS measurement of SINR; and send feedback information to the second communication node on a feedback resource, wherein the feedback information includes the measurement result.

In one embodiment, the sending module 12 is configured to send feedback information to the second communication node on the feedback resources corresponding to the RS whose RSRP is greater than a preset threshold; or, to send feedback information to the second communication node on the feedback resources corresponding to the RS whose SINR is greater than a preset threshold; or, to send feedback information to the second communication node on the feedback resources corresponding to the RS with the largest RSRP; or, to send feedback information to the second communication node on the feedback resources corresponding to the RS with the largest SINR.

In one embodiment, the transmit beam used by the first communication node to send the feedback information is the transmit beam corresponding to the receive beam of the PSCCH associated with the RS;

Alternatively, the transmit beam used by the first communication node to send the feedback information is a transmit beam corresponding to a receive beam of a physical side link shared channel PSSCH including the RS;

Alternatively, the transmission beam used by the first communication node to send feedback information is a transmission beam that can spatially cover the receiving beams of each RS that needs to be fed back simultaneously.

FIG14 is a schematic structural diagram of a device for receiving feedback information provided by an embodiment. The device may be configured in a second communication node. As shown in FIG14 , the device includes: a sending module 20 , a determining module 21 and a receiving module 22 .

The sending module 20 is configured to send at least one reference signal RS to the first communication node; the determining module 21 is configured to determine a feedback resource set according to first information related to at least one RS; and determine a feedback resource corresponding to each RS in the feedback resource set according to fourth information related to each RS in the at least one RS; the receiving module 22, The system is configured to receive feedback information sent by the first communication node on the feedback resource.

The device for receiving feedback information provided in this embodiment is to implement the method for receiving feedback information in the embodiment shown in FIG. 12 . The implementation principle and technical effect of the device for receiving feedback information provided in this embodiment are similar to those in the above embodiment and will not be described in detail here.

In one embodiment, the fourth information includes at least one of the following: a source identification ID carried by the RS, a target address ID carried by the RS, a source ID indicated by a physical side link control channel PSCCH associated with the RS, a target address ID indicated by a PSCCH associated with the RS, an index of the RS indicated by the PSCCH associated with the RS, a relative index of the RS among all RSs indicated by the PSCCH associated with the RS, an index of the RS among all RSs corresponding to the associated PSCCH,

System configuration, preconfigured or predefined reference signal received power RSRP quantization interval index,

System configured, preconfigured or predefined signal to interference plus noise ratio SINR quantization interval index.

In one embodiment, the feedback information includes a measurement result, where the measurement result is determined by the first communication node based on RS measurement of RSRP, or the measurement result is determined by the first communication node based on RS measurement of SINR.

In one embodiment, the receiving module 22 is configured to have a system-configured, pre-configured or pre-defined RSRP quantization interval index, and receive feedback information corresponding to each RSRP energy index corresponding to each RS resource sent by the first communication node on the feedback resource determined by each RSRP energy index corresponding to the RS; or, there is a system-configured, pre-configured or pre-defined SINR quantization interval index, and receive feedback information corresponding to each RSRP energy index corresponding to the RS sent by the first communication node on the feedback resource determined by each RSRP energy index corresponding to each RS resource; or, there is and enables a system-configured, pre-configured or pre-defined RSRP quantization interval index, and receive feedback information corresponding to each RSRP energy index corresponding to the RS sent by the first communication node on the feedback resource determined by each RSRP energy index corresponding to each RS resource. The feedback information corresponding to each RSRP energy index corresponding to the RS sent by the first communication node is received on the feedback resource determined by each SINR energy index corresponding to each RS resource; or, the system configured, preconfigured or predefined SINR quantization interval index exists and is enabled, and the feedback information corresponding to each SINR energy index corresponding to the RS sent by the first communication node is received on the feedback resource corresponding to each RS; or, the system configured, preconfigured or predefined RSRP quantization interval index does not exist or exists but is not enabled, and the feedback information corresponding to the RS sent by the first communication node is received on the feedback resource corresponding to each RS; or, the system configured, preconfigured or predefined SINR quantization interval index does not exist or exists but is not enabled, and the feedback information corresponding to the RS sent by the first communication node is received on the feedback resource corresponding to each RS.

The embodiment of the present application also provides a communication node, including: a processor, the processor is used to implement the method provided in any embodiment of the present application when executing a computer program. Specifically, the communication node can be the first communication node or the second communication node provided in any embodiment of the present application, and the present application does not make specific restrictions on this.

Illustratively, the following embodiment provides a structural diagram in which a communication node is a UE.

Figure 15 is a structural diagram of a UE provided by an embodiment. The UE can be implemented in various forms. The UE in this application may include but is not limited to mobile terminal devices such as mobile phones, smart phones, laptops, digital broadcast receivers, personal digital assistants (PDA), tablet computers (Portable Device, PAD), portable multimedia players (Portable Media Player, PMP), navigation devices, vehicle-mounted terminal equipment, vehicle-mounted display terminals, vehicle-mounted electronic rearview mirrors, etc., as well as fixed terminal devices such as digital televisions (television, TV), desktop computers, etc.

As shown in FIG. 15 , UE 50 may include a wireless communication unit 51, an audio/video (Audio/Video, A/V) input The UE includes an input unit 52, a user input unit 53, a sensing unit 54, an output unit 55, a memory 56, an interface unit 57, a processor 58, and a power supply unit 59, etc. FIG15 shows a UE including various components, but it should be understood that it is not required to implement all the components shown. More or fewer components may be implemented alternatively.

In this embodiment, the wireless communication unit 51 allows radio communication between the UE 50 and a base station or a network. The A/V input unit 52 is configured to receive audio or video signals. The user input unit 53 can generate key input data according to commands input by the user to control various operations of the UE 50. The sensing unit 54 detects the current state of the UE 50, the position of the UE 50, the presence or absence of a user's touch input to the UE 50, the orientation of the UE 50, the acceleration or deceleration movement and direction of the UE 50, etc., and generates commands or signals for controlling the operation of the UE 50. The interface unit 57 serves as an interface through which at least one external device can be connected to the UE 50. The output unit 55 is configured to provide output signals in a visual, audio and/or tactile manner. The memory 56 can store software programs for processing and control operations performed by the processor 58, etc., or can temporarily store data that has been output or is to be output. The memory 56 may include at least one type of storage medium. Moreover, the UE 50 can cooperate with a network storage device that performs the storage function of the memory 56 through a network connection. The processor 58 generally controls the overall operation of the UE 50. The power supply unit 59 receives external power or internal power under the control of the processor 58 and provides appropriate power required to operate various elements and components.

The processor 58 executes at least one functional application and data processing by running the program stored in the memory 56, such as implementing the method provided in the embodiment of the present application.

An embodiment of the present application further provides a computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, the method provided in any embodiment of the present application is implemented.

The computer storage medium of the embodiment of the present application may adopt any combination of one or more computer-readable media. The computer-readable medium may be a computer-readable signal medium or a computer-readable storage medium. The computer-readable storage medium may be, for example, but not limited to: an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, device or device, or any combination of the above. Computer-readable storage media include (a non-exhaustive list): an electrical connection with one or more wires, a portable computer disk, a hard disk, a random access memory (Random Access Memory, RAM), a read-only memory (Read-Only Memory, ROM), an erasable programmable read-only memory (electrically erasable, programmable Read-Only Memory, EPROM), a flash memory, an optical fiber, a portable compact disk read-only memory (Compact Disc Read-Only Memory, CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above. In the present application, a computer-readable storage medium may be any tangible medium containing or storing a program that can be used by or in combination with an instruction execution system, device or device.

A computer-readable signal medium may include a data signal propagated in baseband or as part of a carrier wave, the data signal carrying a computer-readable program code. Such propagated data signals may take a variety of forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination of the above. A computer-readable signal medium may also be any computer-readable medium other than a computer-readable storage medium, which may send, propagate, or transmit a program for use by or in conjunction with an instruction execution system, apparatus, or device.

The program code contained on the computer-readable medium can be transmitted using any appropriate medium, including but not limited to wireless, wire, optical cable, radio frequency (RF), etc., or any suitable combination of the above.

Computer program code for performing operations of the present disclosure may be written in one or more programming languages, or a combination of programming languages, including object-oriented programming languages such as Java, Smalltalk, C++, Ruby, Go), and also conventional procedural programming languages (such as "C" or similar programming languages). The program code can be executed entirely on the user's computer, partially on the user's computer, as a separate software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In the case of a remote computer, the remote computer can be connected to the user's computer through any type of network (including a network (Local Area Network, LAN) or a wide area network (Wide Area Network, WAN)), or can be connected to an external computer (for example, using an Internet service provider to connect through the Internet).

It will be appreciated by those skilled in the art that the term user terminal covers any suitable type of wireless user equipment, such as a mobile phone, a portable data processing device, a portable web browser or a vehicle-mounted mobile station.

In general, various embodiments of the present application can be implemented in hardware or dedicated circuits, software, logic or any combination thereof. For example, some aspects can be implemented in hardware, while other aspects can be implemented in firmware or software that can be executed by a controller, microprocessor or other computing device, although the present application is not limited thereto.

Embodiments of the present application may be implemented by executing computer program instructions by a data processor of a mobile device, for example in a processor entity, or by hardware, or by a combination of software and hardware. The computer program instructions may be assembly instructions, instruction set architecture (ISA) instructions, machine instructions, machine-dependent instructions, microcode, firmware instructions, state setting data, or source code or object code written in any combination of one or more programming languages.

The block diagram of any logic flow in the drawings of the present application may represent program steps, or may represent interconnected logic circuits, modules and functions, or may represent a combination of program steps and logic circuits, modules and functions. A computer program may be stored on a memory. The memory may be of any type suitable for the local technical environment and may be implemented using any suitable data storage technology, such as but not limited to read-only memory (ROM), random access memory (RAM), optical memory devices and systems (digital versatile discs DVD or CD discs), etc. Computer-readable media may include non-transient storage media. The data processor may be of any type suitable for the local technical environment, such as but not limited to a general-purpose computer, a special-purpose computer, a microprocessor, a digital signal processor (Digital Signal Processing, DSP), an application-specific integrated circuit (Application Specific Integrated Circuit, ASIC), a programmable logic device (Field-Programmable Gate Array, FPGA) and a processor based on a multi-core processor architecture.

Claims (18)

A method for sending feedback information, applied to a first communication node, comprising: Receiving at least one reference signal RS sent by the second communication node; Determining a feedback resource set according to first information related to the at least one RS; Determining, according to second information related to each RS in the at least one RS, a feedback resource corresponding to each RS in the feedback resource set; Feedback information is sent to the second communication node on the feedback resource. The method according to claim 1, wherein the determining the feedback resource set according to the first information related to the at least one RS comprises at least one of the following: Determine, according to the time-frequency resource position of each RS in the at least one RS, a feedback resource set corresponding to each RS; Determining a feedback resource set corresponding to the at least one RS according to a time-frequency resource position of a control channel associated with the at least one RS; Determining a feedback resource set corresponding to the at least one RS according to a time-frequency resource position of a data channel including the at least one RS; Determine, according to the time-frequency resource position of the control channel associated with the at least one RS, a feedback resource set corresponding to each RS in the at least one RS; A feedback resource set corresponding to each RS in the at least one RS is determined according to the time-frequency resource position of the data channel containing the at least one RS. The method according to claim 2, wherein the feedback resource set satisfies at least one of the following characteristics: The feedback resource set and the RS are located in the same listen-before-transmit LBT bandwidth; The feedback resource set and the control channel associated with the at least one RS are located in the same LBT bandwidth; The feedback resource set and a data channel including the at least one RS are located in the same LBT bandwidth. The method according to claim 2, wherein the determining, according to the time-frequency resource position of the data channel containing the at least one RS, a feedback resource set corresponding to the at least one RS comprises: Determine the feedback resource time slot position in the time domain of the data resource pool according to the configured or preconfigured feedback time slot period, and determine the first time slot according to the time domain resource position of the physical side link shared channel PSSCH containing the at least one RS, wherein the first time slot is located after the time domain resource position of the PSSCH containing the at least one RS in the data resource pool and satisfies the processing delay. The first feedback resource time slot containing feedback resources; According to the configuration information or pre-configuration information, a number of frequency domain resource units are determined in the frequency domain of the data resource pool, and the number of frequency domain resource units are evenly distributed to each subband on each time slot associated with the feedback resource time slot in the data resource pool, and each subband on each time slot associated with the feedback resource time slot corresponds to at least one frequency domain resource unit; Determine a target subband according to a frequency domain resource position of a PSSCH including the at least one RS, and use at least one frequency domain resource unit corresponding to the target subband in the first time slot as the feedback resource set; or, The PSFCH resource set corresponding to the time-frequency resource position of the data channel containing the at least one RS is used as the feedback resource set. The method according to claim 2, wherein the determining, according to the time-frequency resource position of the control channel associated with the at least one RS, a feedback resource set corresponding to the at least one RS comprises: Determine the feedback resource time slot position in the time domain of the RS resource pool according to the configured or preconfigured feedback time slot period, and determine the second time slot according to the time domain resource position of the physical side link control channel PSCCH associated with the at least one RS, wherein the second time slot is located after the time domain resource position of the PSCCH associated with the at least one RS in the RS resource pool and satisfies the processing delay. The first feedback resource time slot containing feedback resources; According to the configuration information or the pre-configuration information, a number of frequency domain resource units are determined in the frequency domain of the RS resource pool, and the number of frequency domain resource units are evenly distributed to each PSCCH in each time slot associated with the feedback resource time slot in the RS resource pool, and each PSCCH in each time slot associated with the feedback resource time slot corresponds to at least one frequency domain resource unit; According to the frequency domain resource position of the PSCCH associated with the at least one RS, at least one frequency domain resource unit corresponding to the second time slot is used as the feedback resource set. The method according to claim 2, wherein the determining, according to the time-frequency resource position of the control channel associated with the at least one RS, a feedback resource set corresponding to the at least one RS comprises: According to a specific synchronization signal block occasion SSB occasion and third information, K consecutive RS time slots are determined, each of the K RS time slots includes J PSCCHs, each of the PSCCHs is associated with at least one RS resource, and the third information includes at least one of the following information: a configured or preconfigured RS time slot offset, a consecutive number of RS time slots, a consecutive number of RS symbols, a starting RS symbol position, a starting RS time slot position, a starting frequency domain position of an RS resource, a frequency domain bandwidth of an RS resource, and a frequency domain comb of an RS resource; Determine M consecutive feedback resource time slots according to a configured or preconfigured feedback time slot offset, wherein an initial time slot position of the M consecutive feedback resource time slots is determined according to a time domain position of the specific SSB occasion and a first time slot offset, or an initial time slot position of the M consecutive feedback resource time slots is determined according to a time domain position of an RS time slot determined according to the specific SSB occasion and a second time slot offset; each feedback resource time slot of the M consecutive feedback resource time slots includes N feedback opportunities; According to the configuration information or pre-configuration information, determine P frequency domain resource units corresponding to each feedback opportunity in the frequency domain, and evenly allocate the M*N*P frequency domain resource units to the PSCCH of each time slot in the continuous K RS time slots, each of the PSCCHs corresponding to at least one frequency domain resource unit; According to the frequency domain resource position of the PSCCH associated with the at least one RS, at least one frequency domain resource unit corresponding to the PSCCH is used as the feedback resource set, and K, J, M, N, and P are all positive integers. The method according to claim 2, wherein the determining, according to the time-frequency resource position of each RS in the at least one RS, a feedback resource set corresponding to each RS comprises: Determine the time-frequency resource position of the RS resource according to a specific SSB occasion, and determine the time-domain resource index and the frequency-domain resource index of each RS resource according to at least one of the configured or pre-configured number of consecutive RS symbols, the starting RS symbol position, the starting frequency-domain position of the RS resource, the RS resource frequency-domain bandwidth, and the RS resource frequency-domain comb; Determine M consecutive feedback resource time slots according to the configured or preconfigured feedback time slot offset, wherein the initial time slot positions of the M consecutive feedback resource time slots are based on the time domain position of the specific SSB occasion and the third time domain position. The feedback resource time slot is determined by the time slot offset, each feedback resource time slot in the M consecutive feedback resource time slots includes N feedback opportunities; According to the configuration information or pre-configuration information, determine P frequency domain resource units corresponding to each feedback opportunity in the frequency domain, and evenly allocate the M*N*P frequency domain resource units to each RS resource determined according to a specific SSB occasion, wherein each RS corresponds to at least one frequency domain resource unit; The at least one frequency domain resource unit corresponding to the time-frequency resource position of each RS is used as the feedback resource set, and M, N, and P are all positive integers. The method according to claim 1, wherein the second information includes at least one of the following: The source ID carried by the RS, The target address ID carried by the RS, The source ID indicated by the physical side link control channel PSCCH associated with the RS, The target address ID indicated by the PSCCH associated with the RS, the index of the RS indicated by the PSCCH associated with the RS, The relative index of the RS among all RSs indicated by the PSCCH associated with the RS, The index of the RS among all RSs corresponding to the associated PSCCH, The reference signal received power RSRP index corresponding to the reference signal received power on the RS, A signal to interference plus noise ratio SINR index corresponding to the signal to interference plus noise ratio on the RS. The method according to claim 1, wherein sending feedback information to the second communication node on the feedback resource comprises: Measuring RSRP according to the RS or measuring SINR according to the RS, and determining a measurement result; The feedback information is sent to the second communication node on the feedback resource, where the feedback information includes the measurement result. The method according to claim 9, wherein sending the feedback information to the second communication node on the feedback resource comprises: Sending the feedback information to the second communication node on a feedback resource corresponding to an RS whose RSRP is greater than a preset threshold; Alternatively, sending the feedback information to the second communication node on a feedback resource corresponding to an RS having an SINR greater than a preset threshold; Alternatively, sending the feedback information to the second communication node on the feedback resource corresponding to the RS with the largest RSRP; Alternatively, the feedback information is sent to the second communication node on the feedback resource corresponding to the RS with the largest SINR. The method according to claim 9, wherein The transmit beam used by the first communication node to send the feedback information is the transmit beam corresponding to the receive beam of the PSCCH associated with the RS; Alternatively, the transmit beam used by the first communication node to send the feedback information is a transmit beam corresponding to a receive beam of a physical side link shared channel PSSCH including the RS; Alternatively, the transmission beam used by the first communication node to send the feedback information is a transmission beam that can spatially cover the receiving beams of each RS that needs to be fed back simultaneously. A method for receiving feedback information, applied to a second communication node, comprising: Sending at least one reference signal RS to the first communication node; Determining a feedback resource set according to first information related to the at least one RS; Determining, according to fourth information related to each RS in the at least one RS, a feedback resource corresponding to each RS in the feedback resource set; Feedback information sent by the first communication node is received on the feedback resource. The method according to claim 12, wherein the fourth information includes at least one of the following: The source ID carried by the RS, The target address ID carried by the RS, The source ID indicated by the physical side link control channel PSCCH associated with the RS, The target address ID indicated by the PSCCH associated with the RS, the index of the RS indicated by the PSCCH associated with the RS, The relative index of the RS among all RSs indicated by the PSCCH associated with the RS, The index of the RS among all RSs corresponding to the associated PSCCH, System configuration, preconfigured or predefined reference signal received power RSRP quantization interval index, System configured, preconfigured or predefined signal to interference plus noise ratio SINR quantization interval index. The method according to claim 12, wherein the feedback information includes a measurement result, and the measurement result is determined by the first communication node based on the RS measurement RSRP, or the measurement result is determined by the first communication node based on the RS measurement SINR. The method according to claim 12, wherein receiving the feedback information sent by the first communication node on the feedback resource comprises: In the case where there is a system-configured, pre-configured or pre-defined RSRP quantization interval index, receiving feedback information corresponding to each RSRP energy index corresponding to each RS resource sent by the first communication node on the feedback resource determined by each RSRP energy index corresponding to the RS; Alternatively, in the presence of a system configured, preconfigured or predefined SINR quantization interval index, feedback information corresponding to each RSRP energy index corresponding to each RS resource sent by the first communication node is received on a feedback resource determined by each RSRP energy index corresponding to the RS; Alternatively, in the case where a system-configured, pre-configured or pre-defined RSRP quantization interval index exists and is enabled, feedback information corresponding to each RSRP energy index corresponding to each RS resource sent by the first communication node is received on a feedback resource determined by each RSRP energy index corresponding to the RS; Alternatively, in the case where a system configuration, preconfiguration or predefined SINR quantization interval index exists and is enabled, feedback information corresponding to each SINR energy index corresponding to each RS resource sent by the first communication node is received on the feedback resource determined by each SINR energy index corresponding to the RS; Alternatively, in a case where a system-configured, pre-configured or pre-defined RSRP quantization interval index does not exist or exists but is not enabled, feedback information corresponding to each RS sent by the first communication node is received on a feedback resource corresponding to the RS; Alternatively, in the case where a system-configured, pre-configured or pre-defined SINR quantization interval index does not exist or exists but is not enabled, feedback information corresponding to each RS sent by the first communication node is received on the feedback resource corresponding to the RS. A first communication node comprises: a processor; the processor is configured to implement the following when executing a computer program: The method for sending feedback information as described in any one of claims 1 to 11. A second communication node comprises: a processor; the processor is used to implement the feedback information receiving method as described in any one of claims 12-15 when executing a computer program. A computer-readable storage medium stores a computer program, wherein when the computer program is executed by a processor, the method for sending feedback information as described in any one of claims 1 to 11 is implemented, or the method for receiving feedback information as described in any one of claims 12 to 15 is implemented.