Feedback information sending method, feedback information receiving method, communication nodes, and storage medium

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

[0001] Cross-references

[0002] This application claims priority to a Chinese patent application filed with the Patent Office of China 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

[0003] 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

[0004] During beam-based communication in frequency range 2 (FR2) on the sidelink (SL), beam measurement and reporting are typically required to determine the beam pair used for communication between the transmitting user equipment (UE) and the receiving UE. Resources used for beam feedback on the SL can typically be considered in the form of a physical sidelink feedback channel (PSFCH). The traditional PSFCH uses physical uplink control channel (PUCCH) format 0, typically using one physical resource block (PRB) to feedback one bit of information for hybrid automatic repeat request (HARQ) feedback. When a transmitting UE transmits multiple reference signals (RSs) at once, the receiving UE can only determine one feedback resource and can only feedback one bit of information based on the traditional mapping between PSFCH resources and data resources, making it impossible to use it for effective beam information feedback. Therefore, after the receiving UE receives at least one RS in SL FR2 (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.

[0005] Summary of the Invention

[0006] 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 the 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.

[0007] 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 the 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.

[0008] An embodiment of the present application provides a first communication node, comprising: a processor; the processor is configured to implement the method for sending feedback information of any of the above embodiments when executing a computer program.

[0009] An embodiment of the present application provides a second communication node, including: a processor; the processor is configured to implement the method for receiving feedback information of any of the above embodiments when executing a computer program.

[0010] An embodiment of the present application further 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.

[0011] With respect 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

[0012] FIG1 is a schematic diagram of a network of an SL communication system provided by an embodiment;

[0013] FIG2 is a schematic diagram of a time domain mapping of PSFCH resources provided by an embodiment;

[0014] FIG3 is a schematic diagram of a PSSCH and PSFCH feedback resource mapping provided by an embodiment;

[0015] FIG4 is a schematic flow chart of a method for sending feedback information provided by an embodiment;

[0016] FIG5 is a schematic diagram of a non-standalone RS in a data resource pool provided by an embodiment;

[0017] FIG6 is a schematic diagram of a PSSCH region including two RSs provided by an embodiment;

[0018] FIG7 is a schematic diagram of a standalone RS in an RS resource pool provided by an embodiment;

[0019] FIG8 is a time slot structure provided by an embodiment;

[0020] FIG9 is a schematic diagram of an RS time slot provided by an embodiment;

[0021] FIG10 is a schematic diagram of an RS located in an SSB slot according to an embodiment;

[0022] FIG11 is a schematic diagram of a feedback opportunity provided by an embodiment;

[0023] FIG12 is a flow chart of a method for receiving feedback information provided by an embodiment;

[0024] FIG13 is a schematic structural diagram of a device for sending feedback information provided by an embodiment;

[0025] FIG14 is a schematic structural diagram of a device for receiving feedback information provided by an embodiment;

[0026] FIG15 is a schematic structural diagram of a UE provided by an embodiment. DETAILED DESCRIPTION

[0027] It should be understood that the specific embodiments described herein are only used to explain the present application and are not intended to limit the present application. The embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0028] With the development of wireless communication technology and the increasing demand for communication from users, the fifth generation of mobile communication technology (5G) has become the trend of future network development in order to meet the communication requirements of low latency, high reliability and high speed.

[0029] Figure 1 is a networking diagram of an SL communication system provided by an embodiment. As shown in Figure 1, in the SL communication system, when there is a service that needs to be transmitted between terminal devices 1 and 2, the service data between terminal devices 1 and 2 can be transmitted directly from the source terminal device to the target terminal device through SL without passing through the network side, that is, without passing through the cellular link between the terminal device and the access network device. 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. It also supports direct communication in scenarios without network coverage, and can meet special communication needs such as public safety.

[0030] SL communication is typically based on a configured or pre-configured 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 3rd Generation Partnership Project (3GPP) protocol currently supports enabling HARQ feedback. For unicast, this supports ack / nack feedback, and for multicast, it supports both Nack-only feedback and ack / nack feedback for group members.

[0031] Regardless of the feedback method, the PSFCH feedback resource corresponding to each transmitting physical sidelink shared channel (PSSCH) is uniquely determined based on configuration and pre-configured signaling. Taking unicast as an example, assuming SL HARQ feedback is enabled, the receiving UE will provide feedback on the unique PSFCH resource for each PSSCH transmission of the transmitter. The specific method for determining the PSFCH feedback resource is as follows:

[0032] First, the UE determines the slot where the PSFCH resource is located in the SL communication resource pool based on the configured or preconfigured PSFCH period. This 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 one embodiment. As shown in Figure 2, assuming the PSFCH configuration period is 2 and the minimum feedback delay is 1 slot, every two PSSCH time-domain resources will be fixedly mapped to one PSFCH time-domain resource.

[0033] Furthermore, based on the time-frequency location of the PSSCH transmission and the unicast or multicast attributes of the transmitted data, the system maps the receiving UE to a uniquely corresponding PSFCH feedback resource set within the PSFCH slot. A PSFCH feedback resource set contains multiple PSFCH feedback resources, and the feedback resource for each receiving UE is determined by the transmitting UE's source ID and the receiving UE's member ID. Therefore, for each transceiver link requiring feedback, the transmitting UE and the receiving UE jointly determine a unique feedback resource within the PSFCH resource set based on the resource pool configuration. Figure 3 is a schematic diagram of a PSSCH and PSFCH feedback resource mapping provided by one embodiment.

[0034] Considering the increase in data transmission rates on SL, 3GPP Release 18 (Rel-18) launched the SL FR2 research project to conduct preliminary research on the beam training and feedback processes related to SL unicast before, during, and after link establishment. Beam training signals include the sidelink-synchronization signal block (S-SSB), channel state information reference signal (CSI-RS), and demodulation reference signal (DMRS). Beam feedback includes the media access control control element (MAC CE) and PSFCH. During beam training before, during, or after link establishment, three steps are generally required to complete beam pairing:

[0035] 1) The transmitting UE transmits a reference signal for beam training;

[0036] 2) The receiving UE performs beam measurement and determines the transmitting UE's transmit beam, the receiving UE's receive beam, and may further determine the receiving UE's own transmit beam;

[0037] 3) The receiving UE feeds back the measured beam information on the feedback resources corresponding to the transmission of the transmitting UE.

[0038] Through the above three steps, beam pairing or beam maintenance can be achieved between the transmitting and receiving UEs. However, when the transmitting UE transmits multiple reference signals at once, 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.

[0039] The method for sending and receiving feedback information provided in this application can be applied to various wireless communication systems, such as long-term evolution (LTE) systems, fourth-generation mobile communication technology (4G) systems, 5G systems, LTE and 5G hybrid architecture systems, 5G New Radio (NR) systems, and new communication systems emerging in future communication developments, such as sixth-generation mobile communication technology (6G) systems. 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.

[0040] A terminal device can be a device with wireless transceiver capabilities, 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 include: UE, mobile phone, mobile station, tablet computer, notebook computer, ultra-mobile personal computer (UMPC), handheld computer, netbook, personal digital assistant (PDA) and other user equipment that can be connected to the Internet, or virtual reality (VR) terminal, augmented reality (AR) terminal, wireless terminal in industrial control, wireless terminal in autonomous driving, wireless terminal in remote medical, wireless terminal in smart grid, wireless terminal in transportation safety, wireless terminal in smart city, wireless terminal in smart home, etc., or Internet of Things node in the Internet of Things, or vehicle-mounted communication device in the Internet of Vehicles, or entertainment, gaming equipment or system, 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 the terminal.

[0041] The access network device is an access device that the terminal device uses to access the wireless communication system wirelessly. 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 may 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 cooperative cells, and location management functions (LMF) devices. It can also be a module or unit that completes part of the functions of the 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.

[0042] The core network equipment may include an access and mobility management network element and a session management network element. For example, a terminal device may access the core network through the access network equipment to achieve data transmission.

[0043] 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.

[0044] The subbands mentioned in the following embodiments of this application, which may also be referred to as subchannels or subchannels, refer to a group of resources in the frequency domain. In addition, the signaling of the SL UE in this application can be obtained through configuration or pre-configuration, and this application does not make further distinctions. Configuration in this application can include the network configuring a device, a device configuring another device, or pre-configuration.

[0045] The following describes the method for sending and receiving feedback information, the communication nodes, and the technical effects thereof.

[0046] Figure 4 is a flowchart of a method for sending feedback information provided by one embodiment. As shown in Figure 4, the method provided by this embodiment is applicable to a first 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.

[0047] S110. Receive at least one RS sent by the second communication node.

[0048] 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.

[0049] S120. Determine a feedback resource set according to first information related to at least one RS.

[0050] 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.

[0051] Accordingly, the method of “determining a feedback resource set according to the first information related to at least one RS” in step S120 may include at least one of the following methods 1 to 5:

[0052] Method 1: Determine a feedback resource set corresponding to each RS according to the time-frequency resource position of each RS in at least one RS;

[0053] Method 2: Determine a feedback resource set corresponding to at least one RS based on the time-frequency resource position of a control channel associated with at least one RS;

[0054] Method 3: Determine a feedback resource set corresponding to at least one RS based on the time-frequency resource position of a data channel containing at least one RS;

[0055] Method 4: Determine a 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;

[0056] 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 containing at least one RS.

[0057] 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, 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.

[0058] In one embodiment, the feedback resource set satisfies at least one of the following characteristics:

[0059] The feedback resource set and the RS are located in the same Listen Before Talk (LBT) bandwidth;

[0060] The feedback resource set and the control channel associated with at least one RS are located in the same LBT bandwidth;

[0061] The feedback resource set and the data channel including at least one RS are located in the same LBT bandwidth.

[0062] Among them, the LBT bandwidth is usually 20M.

[0063] In one embodiment, for the above-mentioned method 3, the data channel including at least one RS may be a PSSCH including at least one RS. The method for determining the feedback resource set corresponding to the at least one RS according to the time-frequency resource position of the data channel including at least one RS may include the following steps a1 to a3:

[0064] 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.

[0065] Step a2: According to the configuration information or 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.

[0066] 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.

[0067] 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 the method for determining the feedback resource set corresponding to at least one RS based on the time-frequency resource position of the data channel containing 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.

[0068] In one embodiment, for the above-mentioned method 2, the at least one RS-associated control channel may be at least one RS-associated physical sidelink control channel (PSCCH), and the method for determining the feedback resource set corresponding to at least one RS according to the time-frequency resource position of the at least one RS-associated control channel may include the following steps b1 to b3:

[0069] 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.

[0070] Step b2: According to the configuration information or pre-configuration information, determine several frequency domain resource units in the frequency domain of the RS resource pool, and evenly distribute the several frequency domain resource units to each PSCCH on each time slot associated with the feedback resource time slot in the RS resource pool. Each PSCCH on each time slot associated with the feedback resource time slot corresponds to at least one frequency domain resource unit.

[0071] Step b3: Based on the frequency domain resource position of the PSCCH associated with at least one RS, use at least one frequency domain resource unit corresponding to the second time slot as a feedback resource set.

[0072] 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:

[0073] Step c1. Determine K consecutive RS time slots according to a specific synchronization signal block occasion SSB occasion and third information, each RS time slot in 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 pre-configured RS time slot offset, the number of consecutive RS time slots, the number of consecutive RS symbols, the starting RS symbol position, the starting RS time slot position, the starting frequency domain position of the RS resource, the RS resource frequency domain bandwidth, and the RS resource frequency domain comb.

[0074] Step c2: Determine M consecutive feedback resource time slots based on a configured or preconfigured feedback time slot offset, where an initial time slot position of the M consecutive feedback resource time slots is determined based on a time domain position of a specific SSB occasion and a first time slot offset, or the initial time slot position of the M consecutive feedback resource time slots is determined based on a time domain position of an RS time slot determined based on the specific SSB occasion and a second time slot offset; each of the M consecutive feedback resource time slots includes N feedback opportunities.

[0075] 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.

[0076] 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.

[0077] In one embodiment, for the above-mentioned method 1, the method for determining the feedback resource set corresponding to each RS according to the time-frequency resource position of each RS in at least one RS may include the following steps d1 to d4:

[0078] 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.

[0079] Step d2: Determine M consecutive feedback resource time slots based on a configured or preconfigured feedback time slot offset. 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 a third time slot offset. Each of the M consecutive feedback resource time slots includes N feedback opportunities.

[0080] Step d3: Determine P frequency domain resource units corresponding to each feedback occasion in the frequency domain according to the configuration information or pre-configuration information, and evenly allocate 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.

[0081] 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.

[0082] 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.

[0083] 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.

[0084] 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 the Reference Signal Receiving Power (RSRP) on the RS, and an SINR index corresponding to the Signal to Interference plus Noise Ratio (SINR) on the RS.

[0085] In this application, the RSRP index can be determined based on a system configuration, pre-configured, or pre-defined RSRP quantization interval. For example, -inf to -100dBm corresponds to index 0, -100dBm to -80dBm corresponds to index 1, and -80 to inf corresponds to index 2. When the measured RSRP is -90dBm, the index is 1. Similarly, the SINR index can be determined based on a system configuration, pre-configured, or pre-defined SINR quantization interval. Compared to the RSRP index determination method, the only difference is that the SINR unit is decibels, while the RSRP unit is dBm.

[0086] In Example 1, within a data resource pool, the RS used for beam training is located in the PSSCH region within a slot. RS transmission is accompanied by the PSSCH, and the RS bandwidth is the same as the PSSCH. This RS in this scenario is referred to as a non-standalone RS. Figure 5 is a schematic diagram of a non-standalone RS in a data resource pool, provided by one embodiment.

[0087] As shown in Figure 5, the period of the PSFCH feedback resource in the data resource pool is 2, the frequency domain is 2 subbands, and the PSSCH region of each subband in each time slot is accompanied by one or more RSs used for beam training. Figure 6 is a schematic diagram of a PSSCH region including two RSs, provided by an embodiment.

[0088] 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.

[0089] For the frequency domain of the data resource pool, according to the configuration information or pre-configuration information, the frequency domain of the data resource pool is determined. PRBs, the data resource pool includes N subch subbands, the PSFCH resource period in the data resource pool is Then every time the data resource pool is less than or equal to Each slot will be associated with one PSFCH feedback opportunity. The first of the PRBs PRBs are allocated to subband j on time slot i in the data resource pool and 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.

[0090] 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.

[0091] 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 The source ID indicated on the received SCI of the scheduling PSSCH. ID 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 one corresponding feedback resource for each reference signal (each beam); or, M ID It refers to the relative index of the reference signal indicated in the received SCI for scheduling PSSCH. When the SCI indicates N' reference signals, the UE can determine one corresponding feedback resource for each reference signal (each beam).

[0092] Alternatively, 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 according to source ID, destination ID, M ID and at least one of the energy range indexes corresponding to RSRP, such as Where V RSRP Indicates that the beam index is M ID Energy index, D ID It is the target address ID indicated on the SCI of the received scheduling PSSCH or RS.

[0093] It should be noted that the index of RS in this 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 is 0, the index of beam RS1 corresponds to M ID If relative index is used, then when the UE determines the resource, the index of the beam RS is determined according to the number of RS actually transmitted, that is, the index of beam RS1 corresponds to M ID is 0, the index of beam RS1 corresponds to M ID is 1.

[0094] In Example 2, when an RS resource pool is configured or preconfigured, the RS resource pool frequency domain is divided into at least one frequency domain unit, and the time domain is configured or preconfigured with multiple slots within the system oscillation period. In this scenario, the RS can be called a standalone RS, and the RS transmission has nothing to do with the PSSCH. The RS resource pool is not within the SL data resource pool. Figure 7 is a schematic diagram of a standalone RS in an RS resource pool, provided by one embodiment.

[0095] As shown in Figure 7, the period of the PSFCH feedback resource is 2, that is, in the RS resource pool, there is one PSFCH transmission opportunity for every two RS slots. Within a time slot, Figure 8 shows a time slot structure provided by one embodiment. As shown in Figure 8, the PSCCH channel and RS signal within the slot are time-divided, and different PSCCH channels are frequency-divided. One PSCCH resource corresponds to four RS resources (RS1 to RS4) within a time slot.

[0096] 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.

[0097] 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, 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.

[0098] 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.

[0099] 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 The source ID indicated on the received SCI of the scheduling PSSCH. 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 one corresponding feedback resource for each reference signal (each beam); or, M ID It 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 one corresponding feedback resource for each reference signal (each beam).

[0100] In Example 3, the RS time slot is determined based on the SSB slot. Each SSB slot within the system frame period can determine K consecutive RS slots or RS slots with fixed gaps based on system configuration or pre-configuration. The timing of the feedback resources corresponding to the RS resources in the K RS time slots is determined based on the last time slot of the K RS time slots and a time slot offset. The RS time slot consists of two parts: the PSCCH and the RS, which are time-divided.

[0101] Figure 9 is a schematic diagram of an RS time slot provided by an embodiment. As shown in Figure 9, the 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 the configuration or pre-configuration information. PRBs are determined in the time domain within the time slot Feedback opportunity. The first 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.

[0102] 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.

[0103] 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 The source ID indicated on the received SCI of the scheduling PSSCH. 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 one corresponding feedback resource for each reference signal (each beam); or, M ID It 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 one corresponding feedback resource for each reference signal (each beam).

[0104] In Example 4, Figure 10 is a schematic diagram of an RS located within an SSB slot, provided by an embodiment. Figure 11 is a schematic diagram of a feedback opportunity, provided by an embodiment. As shown in Figures 10 and 11, the time slot after the system-configured time slot offset after the SSB is the time slot where the PSFCH feedback opportunity for the SSB slot is located.

[0105] 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 are determined in the time domain within the time slot feedback opportunity, as shown in Figure 11 At this time, The first of the PRBs PRBs are allocated to RS j on time slot i associated with the PSFCH feedback opportunity,

[0106] 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.

[0107] 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 The source ID is carried on the received RS. Each UE can uniquely determine a PSFCH feedback resource for beam information feedback based on the received RS information.

[0108] Alternatively, 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 For the source ID carried on the received RS, configure or preconfigure or predefine some indexes corresponding to the RSRP range, for example, RSRP>0 corresponds to index 1, RSRP≤0 corresponds to index 0, at this time M ID The received RSRP range index is used. Each UE can uniquely determine a PSFCH feedback resource for beam information feedback based on the received RS information.

[0109] S140. Send feedback information to the second communication node on the feedback resource.

[0110] In one embodiment, the method for sending feedback information to the second communication node on a feedback resource may include: measuring RSRP based on an RS or measuring SINR based on an RS to determine a measurement result; and sending feedback information to the second communication node on the feedback resource, the feedback information including the measurement result. Typically, the feedback information occupies 1 bit.

[0111] In which, the first communication node can 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, 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, send feedback information to the second communication node on the feedback resources corresponding to the RS with the largest RSRP; or, send feedback information to the second communication node on the feedback resources corresponding to the RS with the largest SINR.

[0112] 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;

[0113] 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;

[0114] 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.

[0115] Figure 12 is a schematic flow diagram of a method for receiving feedback information provided by one embodiment. As shown in Figure 12, the method provided in 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.

[0116] S210. Send at least one RS to the first communication node.

[0117] 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.

[0118] S220. Determine a feedback resource set according to first information related to at least one RS.

[0119] 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.

[0120] Accordingly, the method of “determining a feedback resource set according to the first information related to at least one RS” in step S220 may include at least one of the following methods 1 to 5:

[0121] Method 1: Determine a feedback resource set corresponding to each RS according to the time-frequency resource position of each RS in at least one RS;

[0122] Method 2: Determine a feedback resource set corresponding to at least one RS based on the time-frequency resource position of a control channel associated with at least one RS;

[0123] Method 3: Determine a feedback resource set corresponding to at least one RS based on the time-frequency resource position of a data channel containing at least one RS;

[0124] Method 4: Determine a 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;

[0125] 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 containing at least one RS.

[0126] 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 in Method 2 is the feedback resource set corresponding to the control channels 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 channels associated with at least one RS, while the feedback resource set determined in 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.

[0127] In one embodiment, the feedback resource set satisfies at least one of the following characteristics:

[0128] The feedback resource set and the RS are located in the same Listen Before Talk (LBT) bandwidth;

[0129] The feedback resource set and the control channel associated with at least one RS are located in the same LBT bandwidth;

[0130] The feedback resource set and the data channel including at least one RS are located in the same LBT bandwidth.

[0131] Among them, the LBT bandwidth is usually 20M.

[0132] In one embodiment, for the above-mentioned method 3, the data channel including at least one RS may be a PSSCH including at least one RS. The method for determining the feedback resource set corresponding to the at least one RS according to the time-frequency resource position of the data channel including at least one RS may include the following steps a1 to a3:

[0133] 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.

[0134] Step a2: According to the configuration information or 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.

[0135] 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.

[0136] 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 the method for determining the feedback resource set corresponding to at least one RS based on the time-frequency resource position of the data channel containing 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.

[0137] In one embodiment, for the above-mentioned method 2, the at least one RS-associated control channel may be at least one RS-associated physical sidelink control channel (PSCCH), and the method for determining the feedback resource set corresponding to at least one RS according to the time-frequency resource position of the at least one RS-associated control channel may include the following steps b1 to b3:

[0138] 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.

[0139] Step b2: According to the configuration information or pre-configuration information, determine several frequency domain resource units in the frequency domain of the RS resource pool, and evenly distribute the several frequency domain resource units to each PSCCH on each time slot associated with the feedback resource time slot in the RS resource pool. Each PSCCH on each time slot associated with the feedback resource time slot corresponds to at least one frequency domain resource unit.

[0140] Step b3: Based on the frequency domain resource position of the PSCCH associated with at least one RS, use at least one frequency domain resource unit corresponding to the second time slot as a feedback resource set.

[0141] 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:

[0142] Step c1. Determine K consecutive RS time slots according to a specific synchronization signal block occasion SSB occasion and third information, each RS time slot in 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 pre-configured RS time slot offset, the number of consecutive RS time slots, the number of consecutive RS symbols, the starting RS symbol position, the starting RS time slot position, the starting frequency domain position of the RS resource, the RS resource frequency domain bandwidth, and the RS resource frequency domain comb.

[0143] Step c2: Determine M consecutive feedback resource time slots based on a configured or preconfigured feedback time slot offset, where an initial time slot position of the M consecutive feedback resource time slots is determined based on a time domain position of a specific SSB occasion and a first time slot offset, or the initial time slot position of the M consecutive feedback resource time slots is determined based on a time domain position of an RS time slot determined based on the specific SSB occasion and a second time slot offset; each of the M consecutive feedback resource time slots includes N feedback opportunities.

[0144] 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.

[0145] 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.

[0146] In one embodiment, for the above-mentioned method 1, the method for determining the feedback resource set corresponding to each RS according to the time-frequency resource position of each RS in at least one RS may include the following steps d1 to d4:

[0147] 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.

[0148] Step d2: Determine M consecutive feedback resource time slots based on a configured or preconfigured feedback time slot offset. 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 a third time slot offset. Each of the M consecutive feedback resource time slots includes N feedback opportunities.

[0149] Step d3: Determine P frequency domain resource units corresponding to each feedback occasion in the frequency domain according to the configuration information or pre-configuration information, and evenly allocate 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.

[0150] 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.

[0151] 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.

[0152] 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.

[0153] 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 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, a system-configured, pre-configured or predefined reference signal received power RSRP quantization interval index, a system-configured, pre-configured or pre-defined signal to interference plus noise ratio SINR quantization interval index.

[0154] S240. Receive feedback information sent by the first communication node on the feedback resource.

[0155] 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.

[0156] In one embodiment, the method for receiving feedback information sent by the first communication node on the feedback resource may include:

[0157] When 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 resource;

[0158] Alternatively, when there is a system-configured, pre-configured, 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 resource;

[0159] 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;

[0160] Alternatively, when a system configuration, preconfigured, 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;

[0161] Alternatively, when there is no RSRP quantization interval index or when it exists but is not enabled, receiving feedback information corresponding to each RS sent by the first communication node on the feedback resource corresponding to the RS;

[0162] Alternatively, when the 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.

[0163] 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.

[0164] 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 .

[0165] 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 the 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; and the sending module 12 is configured to send feedback information to the second communication node on the feedback resource.

[0166] 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 effects 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.

[0167] 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 based on the time-frequency resource position of each RS in at least one RS; determining a feedback resource set corresponding to at least one RS based on the time-frequency resource position of a control channel associated with at least one RS; determining a feedback resource set corresponding to at least one RS based on the time-frequency resource position of a data channel containing at least one RS; determining a feedback resource set corresponding to each RS in at least one RS based on the time-frequency resource position of a control channel associated with at least one RS; determining a feedback resource set corresponding to each RS in at least one RS based on the time-frequency resource position of a data channel containing at least one RS.

[0168] In one embodiment, the feedback resource set satisfies at least one of the following characteristics:

[0169] The feedback resource set and RS are located in the same listen-before-transmit (LBT) bandwidth;

[0170] The feedback resource set and the control channel associated with at least one RS are located in the same LBT bandwidth;

[0171] The feedback resource set and the data channel including at least one RS are located in the same LBT bandwidth.

[0172] 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, where 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; determine a number of frequency domain resource units in the frequency domain of the data resource pool according to the configuration information or pre-configuration information, 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; determine the target subband according to the frequency domain resource position of the PSSCH containing at least one RS, and use the 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.

[0173] 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.

[0174] In one embodiment, the determination module 11 is configured to determine K consecutive RS time slots based on a specific synchronization signal block occasion SSB occasion and third information, where each RS time slot 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; and determine M consecutive feedback resource time slots based on a configured or preconfigured feedback time slot offset, where the initial time slot position of the M consecutive feedback resource time slots is determined based on 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 based on 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 based on the specific SSB The time domain position of the RS time slot determined by the occasion is determined by the offset of the second time slot; each feedback resource time slot in the M consecutive feedback resource time slots contains N feedback opportunities; according to the configuration information or pre-configuration information, the P frequency domain resource units corresponding to each feedback opportunity are determined in the frequency domain, and the M*N*P frequency domain resource units are evenly allocated to the PSCCH of each time slot in the K consecutive RS time slots, and 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 the feedback resource set, and K, J, M, N, and P are all positive integers.

[0175] In one embodiment, the determination module 11 is configured to determine a time-frequency resource position of an RS resource based on a specific SSB occasion, and determine a time domain resource index and a frequency domain resource index for each RS resource based on at least one of a configured or preconfigured number of consecutive RS symbols, a starting RS symbol position, a starting frequency domain position of the RS resource, an RS resource frequency domain bandwidth, and an RS resource frequency domain comb; determine M consecutive feedback resource slots based on a configured or preconfigured feedback slot offset, where an initial slot position of the M consecutive feedback resource slots is determined based on the time domain position of the specific SSB occasion and a third slot offset, and each of the M consecutive feedback resource slots includes N feedback opportunities; determine P frequency domain resource units corresponding to each feedback opportunity in the frequency domain based on configuration information or preconfiguration information, and evenly distribute the M*N*P frequency domain resource units to each RS resource determined based on the specific SSB occasion, with each RS corresponding to at least one frequency domain resource unit; and define the 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.

[0176] 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 the reference signal received power on the RS, and an SINR index corresponding to the signal to interference plus noise ratio on the RS.

[0177] In one embodiment, the sending module 12 is configured to measure RSRP according to the RS or measure SINR according to the RS to determine a measurement result; and send feedback information to the second communication node on the feedback resource, where the feedback information includes the measurement result.

[0178] 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.

[0179] 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;

[0180] 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;

[0181] 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.

[0182] 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 .

[0183] 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 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 fourth information related to each RS in the at least one RS; and the receiving module 22 is configured to receive feedback information sent by the first communication node on the feedback resource.

[0184] The feedback information receiving device provided in this embodiment is to implement the feedback information receiving method of the embodiment shown in FIG12 . The implementation principle and technical effects of the feedback information receiving device provided in this embodiment are similar to those of the above embodiment and will not be repeated here.

[0185] 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, and an index of the RS among all RSs corresponding to the associated PSCCH.

[0186] System configuration, preconfigured or predefined reference signal received power RSRP quantization interval index,

[0187] System configured, preconfigured or predefined signal to interference plus noise ratio (SINR) quantization interval index.

[0188] 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.

[0189] 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 each RS resource; 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 each RS resource 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 each RS resource sent by the first communication node on the feedback resource determined by each RSRP energy index corresponding to each RS resource. or, there exists and enables a system-configured, pre-configured or predefined SINR quantization interval index, and the 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 each RS resource; or, there does not exist or there exists but the system-configured, pre-configured or pre-defined RSRP quantization interval index 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, there does not exist or there exists but the system-configured, pre-configured or pre-defined SINR quantization interval index 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.

[0190] The present application also provides a communication node, including a processor configured to implement the method provided in any embodiment of the present application when executing a computer program. Specifically, the communication node may be the first communication node or the second communication node provided in any embodiment of the present application, and the present application does not impose any specific limitation thereto.

[0191] Illustratively, the following embodiment provides a structural diagram in which a communication node is a UE.

[0192] 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 (PDAs), tablet computers (PADs), portable multimedia players (PMPs), navigation devices, vehicle-mounted terminal devices, vehicle-mounted display terminals, vehicle-mounted electronic rearview mirrors, etc., as well as fixed terminal devices such as digital televisions (TVs) and desktop computers.

[0193] As shown in FIG15 , UE 50 may include a wireless communication unit 51, an audio / video (A / V) 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, among others. FIG15 shows a UE including various components, but it should be understood that implementation of all illustrated components is not required. More or fewer components may be implemented instead.

[0194] In this embodiment, the wireless communication unit 51 allows radio communication between the UE 50 and a base station or 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 based on user input commands to control various operations of the UE 50. The sensing unit 54 detects the current state of the UE 50, the location of the UE 50, the presence or absence of user touch input to the UE 50, the orientation of the UE 50, the acceleration or deceleration movement and direction of the UE 50, 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 connect 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, etc., for processing and control operations executed by the processor 58, or can temporarily store data that has been output or is to be output. The memory 56 can include at least one type of storage medium. Furthermore, the UE 50 can cooperate with a network storage device that performs the storage function of the memory 56 via 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.

[0195] 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.

[0196] 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.

[0197] The computer storage medium of the embodiment of the present application can adopt any combination of one or more computer-readable media. The computer-readable medium can be a computer-readable signal medium or a computer-readable storage medium. The computer-readable storage medium can 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 (non-exhaustive list): an electrical connection with one or more wires, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM), a flash memory, an optical fiber, a portable compact disk 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 can be any tangible medium containing or storing a program, which can be used by an instruction execution system, device or device or used in combination with it.

[0198] A computer-readable signal medium may include a data signal propagated in baseband or as part of a carrier wave, the data signal carrying computer-readable program code. Such propagated data signals may take various forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination thereof. A computer-readable signal medium may also be any computer-readable medium other than a computer-readable storage medium that can transmit, propagate, or transfer a program for use by or in conjunction with an instruction execution system, apparatus, or device.

[0199] The program code contained on the computer-readable medium may 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 foregoing.

[0200] Computer program code for performing the operations of the present disclosure can be written in one or more programming languages ​​or a combination of multiple programming languages, including object-oriented programming languages ​​(such as Java, Smalltalk, C++, Ruby, Go), and also conventional procedural programming languages ​​(such as "C" language 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, it can be connected to an external computer (for example, using an Internet service provider to connect through the Internet).

[0201] 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.

[0202] In general, various embodiments of the present application may be implemented in hardware or dedicated circuits, software, logic, or any combination thereof. For example, some aspects may be implemented in hardware, while other aspects may 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.

[0203] 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.

[0204] Any block diagram of a logical flow in the drawings of this application may represent program steps, or may represent interconnected logical circuits, modules and functions, or may represent a combination of program steps and logical 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), etc. Computer-readable media may include non-transitory storage media. A 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 (DSP), an application-specific integrated circuit (ASIC), a programmable logic device (FPGA), and a processor based on a multi-core processor architecture.

Claims

1. 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.

2. The method according to claim 1, wherein: The determining, according to the first information related to the at least one RS, a feedback resource set includes 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.

3. The method according to claim 2, wherein: The feedback resource set meets 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.

4. 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.

5. 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 includes: 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.

6. 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 includes: 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 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 the 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.

7. 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 includes: According to a specific SSB occasion, determine the time-frequency resource position of the RS resource, 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, P frequency domain resource units corresponding to each feedback occasion are determined in the frequency domain, and the M*N*P frequency domain resource units are evenly allocated to each RS resource determined according to the 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.

8. 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.

9. The method according to claim 1, wherein: Sending feedback information to the second communication node on the feedback resource includes: 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.

10. The method according to claim 9, wherein: Sending the feedback information to the second communication node on the feedback resource includes: 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.

11. 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.

12. 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.

13. 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.

14. The method according to claim 12, wherein: The feedback information includes a measurement result, where the measurement result is determined by the first communication node according to measuring RSRP by the RS, or the measurement result is determined by the first communication node according to measuring SINR by the RS.

15. The method according to claim 12, wherein: Receiving feedback information sent by the first communication node on the feedback resource includes: 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 the absence of or in the absence of a system-configured, pre-configured or pre-defined RSRP quantization interval index, receiving feedback information corresponding to each RS sent by the first communication node 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.

16. A first communication node, comprising: processor; The processor is used to implement the method for sending feedback information as described in any one of claims 1-11 when executing the computer program.

17. A second communication node, comprising: processor; The processor is configured to implement the feedback information receiving method according to any one of claims 12 to 15 when executing a computer program.

18. A computer-readable storage medium storing 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.

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