METHOD AND APPARATUS FOR FEEDBACK INDICATION

Abstract

This application provides a method and apparatus for indicating feedback, to more comprehensively indicate feedback, in order to improve the applicability of a sensing technology in a scenario with multiple devices and multiple interactions. The method and apparatus can be applied to a communication system. The method includes: A first device generates a first frame and sends the first frame. The first frame includes first information, and the first information indicates a type of feedback from a first feedback loop and / or a type of feedback from a second feedback loop. The first and second feedback loops are feedbacks at different levels.

Description

Feedback indication method and device

[0001] This application claims priority to the Chinese patent application filed with the State Intellectual Property Office on June 17, 2021, with application number 202110674951.7 and application name “Feedback Indication Method and Device”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to the field of communications, and in particular to a feedback indication method and device. Background Art

[0003] Wireless passive sensing (hereinafter referred to as sensing) is a technology that can sense the state of a target object without the target object carrying a signal source, such as an electronic tag.

[0004] Specifically, the devices in the perception process may include: a sending device and a receiving device. Among them, the sending device and the receiving device may be two different devices. The sending device can send a measurement signal, such as a null data packet (NDP). Accordingly, the receiving device can receive the measurement signal interfered with by the target object, and determine the channel change between the preset reference measurement signal and the measurement signal interfered with by the target object, such as channel state information (CSI). In this way, the receiving device can directly feedback the channel change to the sending device, so that the sending device can determine the state of the target object based on the channel change, thereby realizing functions such as motion monitoring, gesture recognition, and respiratory sleep monitoring.

[0005] However, with the development of technology, the number of devices and the number of interactions in a perception process may increase. The above-mentioned method of receiving devices directly feeding back to the sending device has gradually become unsuitable for scenarios with multiple devices and multiple interactions.

[0006] Summary of the Invention

[0007] The embodiments of the present application provide a feedback indication method and apparatus to achieve more comprehensive feedback indication, thereby improving the applicability of perception technology in multiple devices and multiple interaction scenarios.

[0008] To achieve the above objectives, this application adopts the following technical solutions:

[0009] In a first aspect, a feedback indication method is provided. The method includes: a first device generating a first frame and sending the first frame. The first frame includes first information indicating a feedback type of the first feedback and / or a feedback type of the second feedback. The first feedback and the second feedback are feedback at different levels.

[0010] According to the method described in the first aspect, in a scenario with multiple devices and multiple interactions, by indicating the feedback types of multiple feedbacks at different levels through the first information, such as the feedback type of the first feedback, and / or the feedback type of the second feedback, a more comprehensive and accurate indication of the feedback type can be achieved, thereby improving the applicability of perception technology in scenarios with multiple devices and multiple interactions.

[0011] In one possible design, the first frame may further include mode indication information. The mode indication information may be used to indicate whether the first information indicates any of the following: a feedback type of the first feedback, a feedback type of the second feedback, or a feedback type of both the first feedback and the second feedback. In this way, a receiving device, such as the second device, can accurately determine the indication content of the first information based on the mode indication information, thereby avoiding erroneous feedback caused by misidentification of the indication content of the first information, thereby improving measurement stability.

[0012] In one possible design, the feedback type of the first feedback may include at least one of the following: uncompressed channel state information (CSI), compressed CSI, null data packet (NDP), a perception measurement result, feedback type determined by a perception initiator, feedback type determined by a perception responder, feedback type determined by a perception transmitter, or feedback type determined by a perception receiver, where the perception initiator is the first device. It can be seen that the first device can flexibly determine the feedback type of the first feedback based on actual needs. For example, if communication efficiency needs to be improved, the first device may determine the feedback type of the first feedback to be compressed CSI to reduce the data size of the first feedback, thereby improving communication efficiency and reducing communication overhead. For another example, if the latency of the perception measurement needs to be reduced, the first device may determine the feedback type of the first feedback to be NDP, so that the first device can independently determine the perception measurement result based on the NDP, thereby avoiding the latency caused by other devices, such as the perception responder, the perception transmitter, or the perception receiver, determining the perception measurement result, thereby improving measurement efficiency. For example, if the computational load of the first device needs to be reduced, the first device may determine the feedback type to be a perception measurement result, so that the first device can receive the perception measurement results from other devices, eliminating the need for the first device to calculate the perception measurement results independently, thereby reducing the computational load of the first device. For another example, if the services of other devices require the feedback type of the first feedback, the first device may determine the feedback type of the first feedback to be determined by the other device, so that the first feedback can meet the service requirements of the other devices and improve the reliability and stability of the service.

[0013] In one possible design, the feedback type of the second feedback may include at least one of the following: uncompressed CSI, compressed CSI, NDP, a perception measurement result, the feedback type determined by the perception initiator, the feedback type determined by the perception responder, the feedback type determined by the perception transmitter, or the feedback type determined by the perception receiver, where the perception initiator is the first device. It can be seen that the first device can flexibly determine the feedback type of the second feedback based on actual needs. For example, if communication efficiency needs to be improved, the first device may determine the feedback type of the second feedback to be compressed CSI to reduce the data size of the second feedback, thereby improving communication efficiency and reducing communication overhead. For another example, if perception measurement latency needs to be reduced, the first device may determine the feedback type of the second feedback to be NDP. This allows the first device to independently determine the perception measurement result based on the NDP, thereby avoiding the delay caused by other devices determining the perception measurement result and improving measurement efficiency. For another example, if the computational load of the first device needs to be reduced, the first device may determine the feedback type of the second feedback to be a perception measurement result. This allows the first device to receive the perception measurement result from other devices, eliminating the need for the first device to independently calculate the perception measurement result, thereby reducing the computational load of the first device. For another example, if the services of other devices require the feedback type of the second feedback, the first device may determine that the feedback type of the second feedback is the feedback type determined by the other device, so that the second feedback can meet the service requirements of the other devices to improve the reliability and stability of the service.

[0014] In one possible design scheme, the first information can be carried in at least one of the following: signaling in the perception establishment phase, or a perception request message in the perception measurement phase, so as to achieve signaling multiplexing, thereby reducing communication overhead and improving communication efficiency.

[0015] In one possible design, the first feedback and the second feedback are feedback at different levels, which may mean that the first feedback is sent at a different timing than the second feedback, or the first feedback is sent to a different recipient than the second feedback.

[0016] In one possible design, the first information may include a first field and / or a second field. The first field may be used to indicate the feedback type of the first feedback, and the second field may be used to indicate the feedback type of the second feedback. Thus, if the first device only needs to indicate the first feedback, it may send only the first field without sending the second field. Similarly, if the first device only needs to indicate the second feedback, it may send only the second field without sending the first field. This avoids sending redundant information, thereby reducing communication overhead and improving communication efficiency.

[0017] In a second aspect, a feedback indication method is provided. The method includes: a second device receiving a first frame and parsing the first frame. The first frame includes first information indicating a feedback type of the first feedback and / or a feedback type of the second feedback. The first feedback and the second feedback are feedback at different levels.

[0018] In one possible design, the first frame may further include mode indication information, where the mode indication information may be used to indicate whether the first information indicates any of the following: a feedback type of the first feedback, a feedback type of the second feedback, or a feedback type of the first feedback and a feedback type of the second feedback.

[0019] In one possible design scheme, the feedback type of the first feedback may include at least one of the following: uncompressed CSI, compressed CSI, NDP, perception measurement results, feedback type determined by the perception initiator, feedback type determined by the perception responder, feedback type determined by the perception sending end, or feedback type determined by the perception receiving end, and the perception sending end may be the second device.

[0020] In one possible design scheme, the feedback type of the second feedback may include at least one of the following: uncompressed CSI, compressed CSI, NDP, perception measurement results, feedback type determined by the perception initiator, feedback type determined by the perception responder, feedback type determined by the perception sending end, or feedback type determined by the perception receiving end, and the perception sending end may be the second device.

[0021] In one possible design, the first feedback and the second feedback are feedback at different levels, which may mean that the first feedback is sent at a different timing than the second feedback, or the first feedback is sent to a different recipient than the second feedback.

[0022] In a possible design scheme, if the first information does not indicate the feedback type of the first feedback, or the first information indicates that the feedback type of the first feedback may include: the feedback type is determined by the perception sending end, and the perception sending end may be the second device. In this way, after the second device parses the first frame, the method described in the second aspect may also include: the second device sends second information to the third device. The second information is used to indicate that the feedback type of the first feedback includes at least one of the following: uncompressed CSI, compressed CSI, NDP, perception measurement result, or the feedback type is determined by the perception receiving end, and the perception receiving end may be the third device. It can be seen that if the first information does not indicate that the feedback type of the first feedback is at least one of the following: uncompressed CSI, compressed CSI, NDP, or perception measurement result, that is, the content of the first feedback is not indicated, then the second information can supplement the content of the first feedback to ensure that the third device can send the first feedback normally, thereby ensuring the stability of the measurement.

[0023] Optionally, the second information may be carried in at least one of the following: signaling in the perception measurement phase, or signaling in the perception reporting phase, to achieve signaling multiplexing, thereby reducing communication overhead and improving communication efficiency.

[0024] In one possible design, the first information may include a first field and a second field, wherein the first field may be used to indicate a feedback type of the first feedback, and the second field may be used to indicate a feedback type of the second feedback.

[0025] Optionally, the first field can be used to indicate that the feedback type of the first feedback includes at least one of the following: uncompressed CSI, compressed CSI, NDP, perception measurement results, or the feedback type is determined by the perception receiving end, and the perception receiving end can be a third device. After the second device parses the first frame, the method described in the second aspect may also include: the second device only sends the first field to the third device.

[0026] Optionally, the second field can be used to indicate the feedback type of the second feedback, including: the feedback type is determined by the perception receiving end, and the perception receiving end can be a third device. After the second device parses the first frame, the method described in the second aspect can also include: the second device only sends the second field to the third device.

[0027] As can be seen, if the second device only needs to indicate the first feedback, it can send only the first field without sending the second field. Similarly, if the second device only needs to indicate the second feedback, it can send only the second field without sending the first field. This avoids sending redundant information, thereby reducing communication overhead and improving communication efficiency.

[0028] Furthermore, after the second device sends only the second field to the third device, the method described in the second aspect may also include: the second device receives third information from the third device. The third information can be used to indicate that the feedback type of the second feedback includes at least one of the following: uncompressed CSI, compressed CSI, NDP, or perceptual measurement result. It can be seen that if the second device does not determine that the feedback type of the second feedback is at least one of the following: uncompressed CSI, compressed CSI, NDP, or perceptual measurement result, that is, the content of the second feedback is not determined, the third device can supplement the content of the first feedback to ensure that the second device can send the second feedback normally, thereby ensuring the stability of the measurement.

[0029] In one possible design scheme, the first information can be carried in at least one of the following: signaling in the perception establishment phase, or signaling in the perception measurement phase, to achieve signaling multiplexing, thereby reducing communication overhead and improving communication efficiency.

[0030] In addition, the technical effects of the feedback indication method described in the second aspect can refer to the technical effects of the feedback indication method described in the first aspect, and will not be repeated here.

[0031] In a third aspect, a feedback indication method is provided. The method includes: a first device sending fourth information to receive first feedback and / or second feedback. The fourth information is used to indicate that the first device needs to obtain the first feedback and / or the second feedback, and the first feedback and the second feedback are feedback at different levels.

[0032] According to the method described in the third aspect, the first device can send the fourth information to the second device based on actual needs, such as business requirements. In this way, the second device can send actually needed feedback to the first device based on the fourth information, while not sending actually unnecessary feedback. This avoids sending redundant information, thereby reducing communication overhead and improving communication efficiency.

[0033] In one possible design, the first feedback and the second feedback are feedback at different levels, which may mean that the first feedback is sent at a different timing than the second feedback, or the first feedback is sent to a different recipient than the second feedback.

[0034] In one possible design scheme, the fourth information can be carried in at least one of the following items: signaling in the perception establishment phase and perception request message in the perception measurement phase, so as to achieve signaling multiplexing, thereby reducing communication overhead and improving communication efficiency.

[0035] In a fourth aspect, a feedback indication method is provided. The method includes: a second device receiving fourth information, and then sending first feedback and / or second feedback based on the fourth information. The fourth information is used to indicate that the first device needs to obtain the first feedback and / or the second feedback, and the first feedback and the second feedback are feedback at different levels.

[0036] In one possible design, the first feedback and the second feedback are feedback at different levels, which may mean that the first feedback is sent at a different timing than the second feedback, or the first feedback is sent to a different recipient than the second feedback.

[0037] In a possible design scheme, the fourth information can be carried in at least one of the following: signaling in the perception establishment phase, and a perception request message in the perception measurement phase.

[0038] In addition, the technical effects of the feedback indication method described in the fourth aspect can refer to the technical effects of the feedback indication method described in the third aspect, and will not be repeated here.

[0039] In a fifth aspect, a feedback indication method is provided. The method includes: a first device generating fifth information and sending the fifth information. The fifth information is used to instruct a second device to determine all configuration parameters of the NDPA, or the fifth information is used to indicate a portion of the NDPA configuration parameters, and the other portion of the NDPA configuration parameters is determined by the second device.

[0040] According to the method described in the fifth aspect, since the configuration parameters of NDPA can be determined by the cooperation of the first device and the second device, it is possible to flexibly determine the configuration parameters of NDPA according to business needs so that the configuration parameters of NDPA can meet business needs. For example, if the business of the first device requires the configuration parameters of NDPA, the configuration parameters of NDPA are determined by the first device. However, if the business of the second device requires the configuration parameters of NDPA, the first device instructs the second device to determine at least part of the configuration parameters of NDPA to meet the business needs of the second device.

[0041] In one possible design scheme, the fifth information can be carried in one or more of the following: signaling in the perception establishment phase, or perception request message in the perception measurement phase, to achieve signaling multiplexing, thereby reducing communication overhead and improving communication efficiency.

[0042] In a sixth aspect, a feedback indication method is provided. The method includes: a second device receiving fifth information and parsing the fifth information. The fifth information is used to instruct the second device to determine all configuration parameters of the NDPA, or the fifth information is used to indicate a portion of the NDPA configuration parameters, and the second device determines another portion of the NDPA configuration parameters.

[0043] In a possible design scheme, the fifth information may be carried in one or more of the following: signaling in the perception establishment phase, or a perception request message in the perception measurement phase.

[0044] In addition, the technical effects of the feedback indication method described in the sixth aspect can refer to the technical effects of the feedback indication method described in the fifth aspect, and will not be repeated here.

[0045] In a seventh aspect, a feedback indication device is provided. The feedback indication device includes: a module, unit, or means for executing the method described in the first aspect, the third aspect, or the fifth aspect. The module, unit, or means can be implemented through hardware, software, or by executing the corresponding software implementation through hardware. The hardware or software includes one or more modules or units corresponding to the above-mentioned functions. The feedback indication device can be the first device described in the first aspect, the third aspect, or the fifth aspect, or a device including the first device, or a device included in the first device, such as a chip.

[0046] In an eighth aspect, a feedback indication device is provided. The feedback indication device includes: a module, unit, or means for executing the method described in the second aspect, the fourth aspect, or the sixth aspect. The module, unit, or means can be implemented through hardware, software, or hardware executing the corresponding software implementation. The hardware or software includes one or more modules or units corresponding to the above-mentioned functions. The feedback indication device can be the second device described in the second aspect, the fourth aspect, or the sixth aspect, or a device including the second device, or a device included in the second device, such as a chip.

[0047] In a ninth aspect, a feedback indication device is provided, comprising: a processor and a memory; the memory is used to store computer instructions, and when the processor executes the instructions, the feedback indication device executes the method described in any of the above aspects. The feedback indication device can be the first device described in the first, third or fifth aspects, or a device including the first device, or a device included in the first device. Alternatively, the feedback indication device can be the second device described in the second, fourth or sixth aspects, or a device including the second device, or a device included in the second device.

[0048] In a tenth aspect, a communication system is provided, which includes the first device described in the above aspect and the second device described in the above aspect.

[0049] In an eleventh aspect, a computer-readable storage medium is provided for storing a computer program, wherein the computer program includes instructions for executing any one of the methods of the first to sixth aspects.

[0050] In a twelfth aspect, a computer program is provided, comprising instructions for executing any one of the methods of aspects 1 to 6. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] Figure 1 is a schematic diagram of the architecture of the perception process;

[0052] Figure 2 is a flow chart of the perception process;

[0053] Figure 3 is a second flow chart of the perception process;

[0054] Figure 4 is a second schematic diagram of the perception process architecture;

[0055] FIG5 is a schematic diagram of the architecture of a communication system provided in an embodiment of the present application;

[0056] FIG6 is a flow chart of a feedback indication method according to an embodiment of the present application;

[0057] FIG7 is a schematic diagram of the architecture of scenario A;

[0058] FIG8 is a flow chart of a feedback indication method according to an embodiment of the present application in scenario A;

[0059] FIG9 is a second flow chart of the feedback indication method provided in Scenario A according to an embodiment of the present application;

[0060] FIG10 is a third flow chart of the feedback indication method provided in scenario A according to an embodiment of the present application;

[0061] FIG11 is a fourth flow chart of the feedback indication method provided in scenario A according to an embodiment of the present application;

[0062] FIG12 is a schematic diagram of the architecture of scenario B;

[0063] FIG13 is a flowchart of a feedback indication method according to an embodiment of the present application in scenario B;

[0064] FIG14 is a second flow chart of the feedback indication method provided in an embodiment of the present application in scenario B;

[0065] FIG15 is a third flow chart of the feedback indication method provided in an embodiment of the present application in scenario B;

[0066] FIG16 is a fourth flow chart of the feedback indication method provided in scenario B according to an embodiment of the present application;

[0067] FIG17 is a schematic diagram of the architecture of scenario C;

[0068] FIG18 is a flowchart of a feedback indication method according to an embodiment of the present application in scenario C;

[0069] FIG19 is a second flow chart of the feedback indication method provided in scenario C according to an embodiment of the present application;

[0070] FIG20 is a third flow chart of the feedback indication method provided in scenario C according to an embodiment of the present application;

[0071] FIG21 is a fourth flow chart of the feedback indication method provided in scenario C according to an embodiment of the present application;

[0072] FIG22 is a fifth flow chart of the feedback indication method provided in scenario C according to an embodiment of the present application;

[0073] FIG23 is a second flow chart of the feedback indication method provided in an embodiment of the present application;

[0074] FIG24 is a fifth flow chart of the feedback indication method provided in scenario A according to an embodiment of the present application;

[0075] FIG25 is a fifth flow chart of the feedback indication method provided in scenario B according to an embodiment of the present application;

[0076] FIG26 is a sixth flow chart of the feedback indication method provided in scenario C according to an embodiment of the present application;

[0077] FIG27 is a third flow chart of the feedback indication method provided in an embodiment of the present application;

[0078] FIG28 is a first structural diagram of a feedback indication device applied to a transmitting end according to an embodiment of the present application;

[0079] FIG29 is a first structural diagram of a feedback indication device applied to a receiving end according to an embodiment of the present application;

[0080] FIG30 is a second structural diagram of a feedback indication device applied to a transmitting end according to an embodiment of the present application;

[0081] FIG31 is a second structural diagram of a feedback indication device applied to a receiving end provided in an embodiment of the present application;

[0082] FIG32 is a third structural diagram of a feedback indication device applied to a transmitting end according to an embodiment of the present application;

[0083] FIG33 is a third structural diagram of a feedback indication device applied to a receiving end provided in an embodiment of the present application. DETAILED DESCRIPTION

[0084] The following introduces the technical terms involved in the embodiments of this application.

[0085] 1. Perception process:

[0086] A sensing process, or a sensing session, can include multiple roles, such as a sensing initiator, a sensing responder, a sensing transmitter, and a sensing receiver. For a sensing process, the sensing initiator initiates the sensing process, the sensing responder participates in the sensing process initiated by the sensing initiator, the sensing transmitter initiates sensing measurements during the sensing process, such as sending an NDP, and the sensing receiver responds to the sensing measurements, determines sensing measurement results, such as CSI, and feeds back the sensing measurement results to the sensing initiator. It can be seen that the functions of these multiple roles do not conflict with each other. In other words, for a device in the sensing process, a single device can have one or more of these roles. For example, the sensing initiator, sensing responder, sensing transmitter, and sensing receiver can be the same device, or they can be two different devices. For example, as shown in Figure 1, the devices in the sensing process include device A and device B, where device A can be the sensing initiator, which is the sensing transmitter, and device B can be the sensing responder, which is the sensing receiver. For ease of understanding, the following takes device A and device B as examples to specifically describe the above perception process.

[0087] For example, FIG2 is a flowchart of the above-mentioned perception process, and FIG3 is a second flowchart of the above-mentioned perception process.

[0088] As shown in Figure 2, the above perception process may include the following steps:

[0089] S201: Device A and device B exchange signaling to establish a sensing process.

[0090] During the perception establishment phase, device A and device B can exchange signaling. As shown in Figure 3, device A sends a perception establishment request message to device B, and device B sends a perception establishment reception message to device A to inform each other of their roles in the perception process, such as device A as the perception initiator and perception sender, and device B as the perception responder and perception receiver, thereby establishing a perception process, or establishing a perception session.

[0091] S202, device A sends a null data packet announcement (NDPA).

[0092] As shown in Figure 3, after the perception session is established, the perception measurement phase can be entered. During the perception measurement phase, device A can send an NDPA at a certain time point, such as a first time point. The NDPA is used to indicate that device A will perform perception measurement at a second time point after the first time point, such as the next frame separated from the NDPA by a short interframe space (SIFS), such as sending a null data packet (NDP), and indicating the configuration of the NDP, such as a long training field (LTF), so that device B can receive and process the NDP at the second time point.

[0093] S203: Device A sends an NDP.

[0094] S204 , device B determines feedback 1 .

[0095] Among them, device B can determine the feedback (feedback) that needs to be sent to device A, such as feedback 1, based on the pre-configured feedback type (feedback type). Among them, the feedback type can be used to determine the content of the feedback, including one or more of the following: CSI, such as compressed CSI, and uncompressed CSI, perception measurement results, or NDP. Specifically, if the feedback type includes CSI, device B can determine feedback 1, that is, CSI, based on NDP. If the feedback type includes perception measurement results, device B can determine feedback 1, that is, perception measurement results, such as whether the target object is moving, the type of movement, whether it is sleeping, etc., based on CSI, such as the currently determined CSI, and the historically determined CSI. If the feedback type includes NDP, device B can determine feedback 1, that is, NDP, based on the configuration of the above-mentioned NDP.

[0096] S205: Device A sends a feedback trigger message.

[0097] As shown in Figure 3, after device A sends the NDP, it may enter the perception reporting phase. During the perception reporting phase, device A may send a feedback request message at a third time point, such as the next frame one SIFS after the NDP. The feedback request message may be used to instruct device B to perform feedback, such as sending feedback 1, at a fourth time point after the third time point, such as the next frame one SIFS after the feedback request message.

[0098] S206 , device B sends feedback 1 to device A.

[0099] Device B may send feedback 1 to device A at the fourth time point. Feedback 1 may include one or more of the aforementioned CSI, perception measurement results, or NDP. Thus, device A may obtain or determine the perception measurement results of the target object based on feedback 1.

[0100] In summary, according to the processes shown in Figures 2 and 3, when device A is the perception initiator (the perception transmitter) and device B is the perception responder (the perception receiver), there is only one feedback, such as feedback 1 sent by device B to device A. The feedback type of feedback 1 can be determined, such as device B determining the feedback type of feedback 1. Therefore, in other words, the current feedback method can only determine the feedback type of one feedback. However, if the perception process requires a larger number of devices or a greater number of interactions, multiple feedbacks may be required. For example, as shown in Figure 4, if the devices involved in the perception process include device A and device B as described above, and also device C, and device A is the perception initiator, device B is the perception responder (the perception transmitter), and device C is the perception responder (the perception receiver), then two feedbacks are required. For example, device B needs to send one feedback, such as feedback 1, to device A, and device C needs to send another feedback, such as feedback 2, to device B. However, according to the current feedback method, only the feedback type of one feedback, such as feedback 1, can be determined, while the feedback type of the other feedback, such as feedback 2, cannot be determined. In other words, the current feedback method is no longer applicable to scenarios with multiple devices and multiple interactions and multiple feedback.

[0101] The technical solution in this application will be described below with reference to the accompanying drawings.

[0102] The technical solutions of the embodiments of the present application can be applied to various communication systems, such as wireless fidelity (WiFi) systems, vehicle-to-everything (V2X) communication systems, device-to-device (D2D) communication systems, Internet of Vehicles communication systems, 4th generation (4G) mobile communication systems, such as long term evolution (LTE) systems, world-wide interoperability for microwave access (WiMAX) communication systems, 5th generation (5G) mobile communication systems, such as new radio (NR) systems, and future communication systems, such as 6th generation (6G) mobile communication systems.

[0103] This application will present various aspects, embodiments, or features in the context of systems that may include multiple devices, components, modules, etc. It should be understood and appreciated that each system may include additional devices, components, modules, etc., and / or may not include all of the devices, components, modules, etc. discussed in conjunction with the figures. Furthermore, combinations of these aspects may also be used.

[0104] Additionally, in the embodiments of this application, words such as "exemplarily" and "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described in this application as an "exemplary" should not be construed as being preferred or advantageous over other embodiments or designs. Rather, the use of the word "exemplary" is intended to present concepts in a concrete manner.

[0105] In the embodiments of the present application, the terms "information," "signal," "message," "channel," and "signaling" may sometimes be used interchangeably. It should be noted that, when the distinction between them is not emphasized, the meanings they intend to convey are the same. The terms "of," "corresponding," and "corresponding" may sometimes be used interchangeably. It should be noted that, when the distinction between them is not emphasized, the meanings they intend to convey are the same.

[0106] In the embodiments of the present application, sometimes a subscript such as W1 may be mistakenly written as a non-subscript form such as W1. When the difference is not emphasized, the meanings to be expressed are the same.

[0107] The network architecture and business scenarios described in the embodiments of the present application are intended to more clearly illustrate the technical solutions of the embodiments of the present application, and do not constitute a limitation on the technical solutions provided in the embodiments of the present application. Ordinary technicians in this field will know that with the evolution of network architecture and the emergence of new business scenarios, the technical solutions provided in the embodiments of the present application are also applicable to similar technical problems.

[0108] To facilitate understanding of the embodiments of the present application, a communication system applicable to the embodiments of the present application is first described in detail using the communication system shown in Figure 5 as an example. For example, Figure 5 is a schematic diagram of the architecture of a communication system applicable to the feedback indication method provided in the embodiments of the present application.

[0109] As shown in FIG5 , the communication system includes multiple devices, such as a first device, a second device, and a third device. At least one of the multiple devices, such as the first device, can determine the feedback type of all feedback or the feedback type of some feedback, while the remaining feedback, such as the feedback type not determined by the at least one device, can be determined by another device, such as a device other than the first device, such as the second device.

[0110] Specifically, taking the first device, the second device, and the third device as an example, the second device can be connected to the first device and the third device, respectively. Optionally, the third device can also be connected to the first device. In addition, any of the first device, the second device, and the third device can be a network device or a terminal device, without limitation.

[0111] The network device is located on the network side of the communication system and has wireless transceiver functions or is a chip or chip system that can be installed in the device. The network device includes, but is not limited to, an access point (AP) in a wireless fidelity (WiFi) system, such as a home gateway, a router, a server, a switch, a bridge, etc., an evolved Node B (eNB), a radio network controller (RNC), a Node B (NB), a base station controller (BSC), a base transceiver station (BTS), a home base station (e.g., home evolved NodeB, or home Node B, HNB), a baseband unit (BBU), a wireless relay node, a wireless backhaul node, a transmission and reception point (TRP or transmission point, TP), etc. It can also be 5G, such as a gNB in ​​a new radio (NR) system, or a transmission point (TRP or TP), one or a group of antenna panels (including multiple antenna panels) of a base station in a 5G system, or a network node constituting a gNB or a transmission point, such as a baseband unit (BBU) or a distributed unit (DBU). unit (DU), road side unit (RSU) with base station function, etc.

[0112] The terminal device is a terminal that accesses the communication system and has a wireless transceiver function or a chip or chip system that can be set at the terminal. The terminal device can also be called a user device, an access terminal, a user unit, a user station, a mobile station, a mobile station, a remote station, a remote terminal, a mobile device, a user terminal, a terminal, a wireless communication device, a user agent or a user device. The terminal device in the embodiment of the present application can be a mobile phone, a tablet computer, a computer with a wireless transceiver function, a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, a wireless terminal in industrial control, a wireless terminal in self-driving, a wireless terminal in telemedicine, a wireless terminal in smart grid, a wireless terminal in transportation safety, a wireless terminal in smart city, a wireless terminal in smart home, a vehicle-mounted terminal, an RSU with terminal function, etc.

[0113] It should be noted that the feedback indication method provided in the embodiment of the present application can be applicable between two or three devices shown in Figure 5, such as between the first device and the second device, and between the first device, the second device and the third device. The specific implementation can refer to the following method embodiment, which will not be repeated here.

[0114] It should be noted that the solutions in the embodiments of the present application can also be applied to other communication systems, and the corresponding names can also be replaced by the names of corresponding functions in other communication systems.

[0115] It should be understood that FIG5 is only a simplified schematic diagram for ease of understanding, and the communication system may also include other network devices and / or other terminal devices, which are not shown in FIG5 .

[0116] Among them, the feedback indication method provided in this application may include multiple embodiments, such as the first embodiment, the second embodiment and the third embodiment. The various embodiments of the feedback indication method will be specifically described below in conjunction with Figures 6 to 24.

[0117] First embodiment:

[0118] For example, FIG6 is a flow chart of the feedback indication method provided in an embodiment of the present application. The feedback indication method can be applicable to the three devices shown in FIG5 , such as the communication between the first device, the second device and the third device. Among them, any one of the first device, the second device and the third device can be one or more of the following: a perception initiator, a perception responder, a perception transmitter, or a perception receiver. For ease of understanding, the embodiment of the present application takes the perception initiator as the first device, the perception transmitter and the perception responder as the second device, or the second device as the perception responder for the perception transmitter, the perception receiver and the perception responder as the third device, or the third device as the perception responder for the perception receiver as an example, but is not limited thereto.

[0119] As shown in FIG6 , the feedback indication method may include the following steps:

[0120] S601: A first device generates a first frame.

[0121] The first frame may be frame structure data including first information. The first information may be used to indicate feedback types of all feedback or part of the feedback, such as the feedback type of the first feedback and / or the feedback type of the second feedback.

[0122] The first and second feedback described above can be feedback generated during a single perception process, and can be feedback at different levels. Specifically, on the one hand, the first and second feedback being feedback at different levels can mean that the first feedback is sent at a different timing than the second feedback. For example, if the first feedback is sent before the second feedback, the first feedback can be first-level feedback, while the second feedback can be second-level feedback; conversely, if the second feedback is sent before the first feedback, the second feedback can be first-level feedback, while the first feedback can be second-level feedback. Alternatively, on the other hand, the first and second feedback being feedback at different levels can mean that the first feedback is sent to a different recipient than the second feedback. For example, based on the connection relationship shown in FIG5 , the first feedback can be feedback sent by a third device to a second device, or, in other words, feedback sent by a perception responder (a perception receiving end) to a perception responder (a perception sending end). Alternatively, when the first device is connected to a third device, the first feedback can also be feedback sent by the third device to the first device, or, in other words, feedback sent by a perception responder (a perception receiving end) to a perception initiator. In this manner, the first feedback can be considered first-level feedback. The second feedback may be feedback sent by the second device to the first device, or in other words, feedback sent by the perception responder of the perception transmitter to the perception initiator. In this way, the second feedback may be considered as second-level feedback.

[0123] It should be understood that the above-mentioned feedback levels are only an example and are not intended to be limiting. For example, if the first device can send multiple feedbacks continuously or discontinuously to the same device, such as the second device, then the multiple feedbacks can be of the same level, or levels of different levels. Discontinuous transmission means that during the process of the first device sending multiple feedbacks, it also receives feedback from other devices, such as a third device. For another example, if the first device sends feedback to multiple devices, such as the second device and the third device, respectively, then these feedbacks can be of the same level, or levels of different levels. In addition, the feedback levels are not limited to two levels, and there can be more levels, such as three levels, four levels, and so on.

[0124] It should be understood that the embodiments of this application use the first and second feedback as examples, but are not limited thereto. For example, all the aforementioned feedback may also include: third feedback, fourth feedback, fifth feedback, and so on. For specific implementations, please refer to the relevant descriptions of the first and second feedback, and will not be repeated here.

[0125] The feedback type of the first feedback may include at least one of the following: uncompressed CSI, compressed CSI, NDP, a perception measurement result, feedback type determined by a perception initiator, feedback type determined by a perception responder, feedback type determined by a perception transmitter, or feedback type determined by a perception receiver. Alternatively, the feedback type of the first feedback may further include: feedback type determined by an arbitrary device, wherein the perception measurement result may be a change in CSI, or whether the degree of change exceeds a threshold. In addition, the arbitrary device may be at least one of the following: a perception initiator, a perception responder, a perception transmitter, or a perception receiver.

[0126] As can be seen, for the first feedback, the first device can flexibly determine the feedback type of the first feedback based on actual needs. For example, if communication efficiency needs to be improved, the first device may determine the feedback type of the first feedback to be compressed CSI to reduce the data size of the first feedback, thereby improving communication efficiency and reducing communication overhead. For another example, if the latency of the perception measurement needs to be reduced, the first device may determine the feedback type of the first feedback to be NDP, so that the first device can independently determine the perception measurement result based on the NDP, thereby avoiding the latency caused by other devices, such as the perception responder, the perception transmitter, or the perception receiver, to determine the perception measurement result, thereby improving measurement efficiency. For another example, if the computational load of the first device needs to be reduced, the first device may determine the feedback type to be perception measurement result, so that the first device can receive the perception measurement result from the other device, eliminating the need for the first device to calculate the perception measurement result itself, thereby reducing the computational load of the first device. For another example, if the service of the other device requires the feedback type of the first feedback, the first device may determine the feedback type of the first feedback to be determined by the other device, so that the first feedback can meet the service requirements of the other device, thereby improving the reliability and stability of the service.

[0127] Furthermore, the feedback type of the second feedback may include at least one of the following: uncompressed CSI, compressed CSI, NDP, a sensing measurement result, feedback type determined by a sensing initiator, feedback type determined by a sensing responder, feedback type determined by a sensing transmitter, or feedback type determined by a sensing receiver. Alternatively, the feedback type of the second feedback may further include: feedback type determined by an arbitrary device, where the arbitrary device may also be at least one of the following: a sensing initiator, a sensing responder, a sensing transmitter, or a sensing receiver.

[0128] As can be seen from this, for the second feedback, the first device can also flexibly determine the feedback type of the second feedback based on actual needs. For example, if communication efficiency needs to be improved, the first device may determine the feedback type of the second feedback to be compressed CSI to reduce the data size of the second feedback, thereby improving communication efficiency and reducing communication overhead. For another example, if the latency of perception measurement needs to be reduced, the first device may determine the feedback type of the second feedback to be NDP. This allows the first device to independently determine the perception measurement result based on the NDP, thereby avoiding the latency caused by other devices determining the perception measurement result and improving measurement efficiency. For another example, if the computational load of the first device needs to be reduced, the first device may determine the feedback type of the second feedback to be perception measurement result. This allows the first device to receive the perception measurement result from the other device, eliminating the need for the first device to calculate the perception measurement result itself, thereby reducing the computational load of the first device. For another example, if the service of the other device requires the feedback type of the second feedback, the first device may determine the feedback type of the second feedback to be determined by the other device. This allows the second feedback to meet the service requirements of the other device and improve service reliability and stability.

[0129] Furthermore, in combination with the various feedback types of the first feedback and the various feedback types of the second feedback, the indication method of the first information may specifically be any of the following methods:

[0130] In mode 1, the first information is only used to indicate that the feedback type of the first feedback includes at least one of the following: uncompressed CSI, compressed CSI, NDP, or perceptual measurement result (hereinafter referred to as the "specific feedback type of the first feedback"), and is only used to indicate that the feedback type of the second feedback includes at least one of the following: uncompressed CSI, compressed CSI, NDP, or perceptual measurement result (hereinafter referred to as the "specific feedback type of the second feedback"), or is used to indicate the specific feedback type of the first feedback and the specific feedback type of the second device.

[0131] In mode 2, the first information is only used to indicate that the feedback type of the first feedback is the feedback type determined by the perception sending end, that is, the feedback type of the first feedback is determined by the second device, and is only used to indicate that the feedback type of the second feedback is the feedback type determined by the perception sending end, that is, the feedback type of the second feedback is determined by the second device, or is used to indicate that the feedback type of the first feedback and the feedback type of the second feedback are both determined by the second device.

[0132] Mode 3: The first information is only used to indicate that the feedback type of the first feedback is determined by the perception receiving end, that is, the feedback type of the first feedback is determined by the third device, and is only used to indicate that the feedback type of the second feedback is determined by the perception receiving end, that is, the feedback type of the second feedback is determined by the third device, or is used to indicate that the feedback type of the first feedback and the feedback type of the second feedback are both determined by the third device.

[0133] In mode 4, the first information is used to indicate that the feedback type of the first feedback is determined by the second device, and the feedback type of the second feedback is determined by the third device.

[0134] In mode 5, the first information is used to indicate that the feedback type of the second feedback is determined by the second device, and the feedback type of the first feedback is determined by the third device.

[0135] In mode 6, the first information is used to indicate a specific feedback type of the first feedback, and the feedback type of the second feedback is determined by the second device.

[0136] Mode 7: The first information is used to indicate a specific feedback type of the second feedback, and the feedback type of the first feedback is determined by the second device.

[0137] In mode 8, the first information is used to indicate a specific feedback type of the first feedback, and the feedback type of the second feedback is determined by the third device.

[0138] Mode 9: The first information is used to indicate a specific feedback type of the second feedback, and the feedback type of the first feedback is determined by the third device.

[0139] Method 10, the first information is used to indicate the specific feedback type of the first feedback, and the feedback type of the second feedback is determined by any device among the perception responding end, the perception sending end, and the perception receiving end, that is, the feedback type of the second feedback is determined by any device among the second device and the third device.

[0140] In mode 11, the first information is used to indicate that the feedback type of the first feedback is determined by the second device, and the feedback type of the second feedback is determined by any device of the second device and the third device.

[0141] In mode 12, the first information is used to indicate that the feedback type of the first feedback is determined by the third device, and the feedback type of the second feedback is determined by any device of the second device and the third device.

[0142] Method 13, the first information is used to indicate the specific feedback type of the second feedback, and the feedback type of the first feedback is determined by any device among the perception responding end, the perception sending end, and the perception receiving end, that is, the feedback type of the first feedback is determined by any device among the second device and the third device.

[0143] In mode 14, the first information is used to indicate that the feedback type of the second feedback is determined by the second device, and the feedback type of the first feedback is determined by any device of the second device and the third device.

[0144] In mode 15, the first information is used only to indicate that the feedback type of the first feedback is determined by any device of the second device and the third device, and is used only to indicate that the feedback type of the second feedback is determined by any device of the second device and the third device, or is used to indicate that the feedback type of the first feedback is determined by any device of the second device and the third device, and the feedback type of the second feedback is determined by any device of the second device and the third device.

[0145] It should be noted that the first device can determine the above-mentioned multiple indication methods of the first information based on one or more of the following: the status of the first device, such as load, packet loss rate, etc., the status of the second device, the status of the third device, the business needs of the first device, the business needs of the second device, or the business needs of the third device, without limitation. Moreover, the indication method of the first information may also be different for different application scenarios. For example, if the business of the first device has requirements for a specific feedback type of feedback, the first information can indicate the specific feedback type according to the business requirements to meet the business requirements of the first device and ensure the business reliability of the first device. For another example, if the business of the first device has no requirements for a specific feedback type of feedback, the first information can instruct other devices to determine the feedback type so that the feedback can meet the business requirements of other devices and ensure the business reliability of other devices.

[0146] It should be understood that in the above-mentioned methods 1 to 3, if the first information only indicates the specific feedback type of the first feedback, or only indicates that the feedback type of the first feedback is determined by the second device or the third device, then the feedback type of the second feedback can be determined by default, such as predefined or preconfigured by the protocol, or the feedback type of the second feedback can be determined by other devices, such as the second device or the third device. For example, the second device or the third device can send information to indicate the specific feedback type of the second feedback, or indicate that the feedback type of the second feedback is determined by the second device or the third device. For specific implementation, please refer to the relevant introduction in S603 below. Similarly, if the first information only indicates the specific feedback type of the second feedback, or only indicates that the feedback type of the second feedback is determined by the second device or the third device, then the feedback type of the first feedback can be determined by default, such as predefined or preconfigured by the protocol, or the feedback type of the first feedback can be determined by other devices, such as the second device or the third device. For example, the second device or the third device may send information to indicate that the information can be used to indicate the specific feedback type of the first feedback, or to indicate that the feedback type of the first feedback is determined by the second device or the third device. For specific implementation, please refer to the relevant description in S603 below. In other words, if the first information only indicates the specific feedback type of some of the feedback in all the feedback, or only indicates that the feedback type of some of the feedback in all the feedback is determined by other devices, then the feedback type of the remaining feedback in all the feedback, that is, the feedback not indicated by the first information, may be determined by default or determined by other devices.

[0147] It should also be understood that in Modes 10-15, the first information is used to indicate that the feedback type of the first feedback is determined by any of the second or third devices. This can be understood as the first information not indicating the feedback type of the first feedback. Thus, the first information has the same indication effect as in Modes 1-3, where the first information is used only to indicate the feedback type of the second feedback. That is, the feedback type of the first feedback can be determined by default or by another device. Similarly, in Modes 10-15, the first information is used to indicate that the feedback type of the second feedback is determined by any of the second or third devices. This can be understood as the first information not indicating the feedback type of the second feedback. Thus, the first information has the same indication effect as in Modes 1-3, where the first information is used only to indicate the feedback type of the first feedback. That is, the feedback type of the second feedback can be determined by default or by another device. However, since in Modes 1 to 3, the first information is only used to indicate the feedback type of the first feedback, or only used to indicate the feedback type of the second feedback, compared to the mode in which the feedback types of all feedbacks are indicated in Modes 10 to 15, the indication content carried by the first information can be reduced, thereby reducing the data size of the first information, and further reducing communication overhead, thereby improving communication efficiency.

[0148] In summary, for the feedback type of the first feedback, the first information may indicate that the feedback type of the first feedback includes at least one of the following: uncompressed CSI, compressed CSI, NDP, or perception measurement result, that is, the specific feedback type of the first feedback, and / or, the feedback type of the first feedback includes at least one of the following: the feedback type is determined by the perception initiator, the feedback type is determined by the perception responder, the feedback type is determined by the perception sending end, the feedback type is determined by the perception receiving end, or the feedback type is determined by other devices, that is, determined by the second device, the third device, or any device among the second device and the third device. Similarly, for the feedback type of the second feedback, the first information may indicate that the feedback type of the second feedback includes at least one of the following: uncompressed CSI, compressed CSI, NDP, or perception measurement result, that is, the specific feedback type of the second feedback, and / or, the feedback type of the second feedback includes at least one of the following: the feedback type is determined by the perception initiator, the feedback type is determined by the perception responder, the feedback type is determined by the perception transmitter, the feedback type is determined by the perception receiver, or the feedback type is determined by another device, that is, the feedback type is determined by the second device, the third device, or any device between the second device and the third device. Further, the indication principle of the first information is introduced below using the first feedback and the second feedback as examples.

[0149] Exemplarily, the first information may include one or more fields, each of which may be used to indicate the feedback type of a corresponding piece of feedback among all feedbacks. For example, the first information may include a first field and / or a second field. The first field may indicate the feedback type of the first feedback. Similarly, the second field may indicate the feedback type of the second feedback. In this way, if the first device only needs to indicate the first feedback, it may send only the first field without sending the second field. Similarly, if the first device only needs to indicate the second feedback, it may send only the second field without sending the first field. This avoids sending redundant information, thereby reducing communication overhead and improving communication efficiency.

[0150] For ease of understanding, the first field is used as an example for introduction below. For the specific implementation of the second field, please refer to the relevant introduction of the first field below.

[0151] Specifically, the first field includes multiple bits, such as 3-9 bits, etc. In this way, the first field can indicate the feedback type of the first feedback through an index composed of multiple bits, or through a bit map of multiple bits, or bit positions, indicating the feedback type of the first feedback, which are introduced below.

[0152] A. Index indication:

[0153] Among them, since multiple bits can form different indexes, and different indexes can indicate different feedback types of the first feedback, for example, as shown in Table 1 below.

[0154] Table 1

[0155]

[0156]

[0157] As can be seen from Table 1, the index may include 5 bits to indicate the various feedback types shown in Table 1. Thus, the first device may traverse Table 1 to determine the index corresponding to the feedback type that the first device wants to indicate, thereby generating first information including the index to indicate the feedback type that the first device wants to indicate.

[0158] For example, if the first device wants to indicate that the feedback type of the first feedback is uncompressed CSI, it traverses Table 1 to generate first information carrying index 00000 to indicate that the feedback type of the first feedback is uncompressed CSI.

[0159] For another example, if the first device wants to indicate that the feedback type of the first feedback includes uncompressed CSI and perceptual measurement results, it traverses Table 1 to generate first information carrying index 00110 to indicate that the feedback type of the first feedback includes uncompressed CSI and perceptual measurement results.

[0160] For another example, if the first device wants to indicate that the feedback type of the first feedback is determined by the perception sending end (the perception sending end is the second device), it traverses Table 1 to generate first information carrying index 10001, which is used to indicate that the feedback type of the first feedback is the feedback type determined by the perception sending end. It can be seen that in this case, since the second device and the third device are both perception responders, or there are multiple perception responders, the first device cannot determine the index based on the second device as the perception responder. Instead, it needs to determine the index based on the second device as the perception sending end to avoid misdetermination and misindication.

[0161] It should be understood that the manner in which the indices in Table 1 are indicated is merely an example and is not intended to be limiting. For example, a single index in Table 1 may also indicate the feedback type of multiple feedbacks at different levels, such as indicating first-level feedback, where the feedback type of the first feedback is uncompressed CSI, and indicating second-level feedback, where the feedback type of the second feedback is compressed CSI. Furthermore, the order in which the indices in Table 1 are assigned values, i.e., in ascending binary order, is merely an example and is not intended to be limiting. For example, the indices in Table 1 may also be assigned values ​​in descending binary order, or randomly, without limitation.

[0162] It should be noted that the indication method in Table 1 above is only an example and is not intended to be limiting. For example, the first information may also include multiple indexes, each index used to indicate the feedback type. For example, the feedback type of the first feedback and / or the feedback type of the second feedback may be determined by the Nth device corresponding to the index, where N is a positive integer. The Nth device may be the Nth device after the device corresponding to the index, or the Nth hop device. For example, the link hop relationship is first device → second device → third device. If the feedback type of the first feedback is determined by the third device, the first information sent by the first device to the second device may include a first index and a second index, wherein the first index corresponds to the first device and is used to indicate that the feedback type of the first feedback is determined by the second device (the third device), and the second index corresponds to the second device and is used to indicate that the feedback type of the first feedback is determined by the first device (the third device). In this way, after the second device receives the first information, the first information sent by the second device to the third device may only include the second index to indicate that the feedback type of the first feedback is determined by the first device.

[0163] It should be understood that in actual applications, if it is not necessary to indicate a combination of various specific feedback types, it can also be as shown in Table 2 below.

[0164] Table 2

[0165] Index Feedback Type 0000 Uncompressed CSI 0001 Compressed CSI 0010 NDP 0011 Perception Measurement Result 0100 Feedback Type Determined by the Perception Initiator 0101 Feedback Type Determined by the Perception Responder 0110 Feedback Type Determined by the Perception Sender 0111 Feedback Type Determined by the Perception Receiver 1000 Feedback Type Determined by Any Device / Uncertain Feedback Type

[0166] It can be seen that the index in Table 2 is 4 bits. Compared with the index in Table 1 which is 5 bits, the data length of the index in Table 2 is shorter and the data volume is smaller, thereby reducing the communication overhead and improving the communication efficiency.

[0167] It should also be understood that in actual applications, if it is not necessary to indicate the combination of various specific feedback types and which device determines the feedback type, it can be as shown in Table 3 below.

[0168] Table 3

[0169] Index Feedback Type 000 Uncompressed CSI 001 Compressed CSI 010 NDP 011 Perceptual Measurement Result 100 Feedback Type Determined by Any Device / Uncertain Feedback Type

[0170] It can be seen that compared with the 4-bit index in Table 2, the data length of the index in Table 3 is further shortened to 3 bits, which can further reduce the communication overhead and further improve the communication efficiency.

[0171] B. Bitmap indication:

[0172] The first field includes multiple bits, and each bit can indicate a feedback type, for example, as shown in Table 4 below.

[0173] Table 4

[0174]

[0175] Among them, according to Table 4, it can be seen that the bit map in Table 4 may include 9 bits, and the 9 bits are in order from left to right, and each bit can be used to indicate a feedback type. For example, the first bit can be used to indicate whether the feedback type of the first feedback includes uncompressed CSI, which is 1, indicating that it includes uncompressed CSI, and 0, indicating that it does not include uncompressed CSI. The second bit can be used to indicate whether the feedback type of the first feedback includes compressed CSI, which is 1, indicating that it includes compressed CSI, and 0, indicating that it does not include compressed CSI. The third bit can be used to indicate whether the feedback type of the first feedback includes NDP, which is 1, indicating that it includes NDP, and 0, indicating that it does not include NDP. Similarly, the ninth bit can be used to indicate whether the first information does not indicate the feedback type, which is 1, indicating that the first information does not indicate the feedback type of the first feedback, and 0, indicating that the first information indicates the feedback type of the first feedback.

[0176] Furthermore, the first device may traverse Table 4 to determine the bitmap corresponding to the feedback type that the first device wants to indicate, thereby generating first information carrying the bitmap to indicate the feedback type that the first device wants to indicate.

[0177] For example, if the first device wants to indicate that the feedback type of the first feedback is uncompressed CSI, it traverses Table 1 to generate first information carrying the bitmap 100000000 to indicate that the feedback type of the first feedback is uncompressed CSI.

[0178] For another example, if the first device wants to indicate that the feedback type of the first feedback includes uncompressed CSI and perceptual measurement results, it traverses Table 1 to generate first information carrying the bitmap 100100000 to indicate that the feedback type of the first feedback includes uncompressed CSI and perceptual measurement results.

[0179] For another example, if the first device wants to indicate that the feedback type of the first feedback is determined by the sensing sender (the second device is the sensing sender), it traverses Table 1 to generate first information carrying the bitmap 000000100 to indicate that the feedback type of the first feedback is the feedback type determined by the sensing sender. It can be seen that in this case, since the second device and the third device are both sensing responders, the first device cannot determine the bitmap based on the second device as the sensing responder. Instead, it needs to determine the bitmap based on the second device as the sensing sender to avoid misdetermination and misindication.

[0180] It should be understood that in actual applications, if it is not necessary to indicate a combination of various specific feedback types, the following Table 5 may be used.

[0181] Table 5

[0182] Bitmap feedback type 100000000 Uncompressed CSI 010000000 Compressed CSI 001000000 NDP 000100000 Perception measurement result 000010000 Determined by the perception initiator Feedback type 000001000 Determined by the perception responder Feedback type 000000100 Determined by the perception sender Feedback type 000000010 Determined by the perception receiver Feedback type 000000001 Determined by any device Feedback type / Uncertain feedback type

[0183] It can be seen that compared with Table 4 which includes 21 bitmaps, Table 5 only includes 9 bitmaps, so that the first device can determine the corresponding bitmap more quickly by traversing Table 5, thereby improving processing efficiency.

[0184] It should also be understood that in actual applications, if it is not necessary to indicate the combination of various specific feedback types and which device determines the feedback type, it can be as shown in the following Table 6.

[0185] Table 6

[0186] Bitmap feedback type 10000 Uncompressed CSI 01000 Compressed CSI 00100 NDP 00010 Perception measurement result 00001 Feedback type determined by the perception initiator

[0187] It can be seen that the bitmap in Table 6 is 5 bits, compared with the bitmap in Table 5 which is 9 bits. The data length of the bitmap in Table 6 is shorter and the data volume is smaller, which can reduce communication overhead and improve communication efficiency.

[0188] It should be noted that since the first feedback may be feedback sent by a third device to the second device, and the second feedback may be feedback sent by the second device to the first device, after receiving the first feedback, the second device can determine the second feedback based on the first feedback. In other words, the second feedback is determined based on the first feedback. Therefore, the feedback type of the first feedback and the feedback type of the second feedback must satisfy the determination logic between the first feedback and the second feedback. For example, based on the determination logic of NDP→CSI→perceptual measurement result, if the feedback type of the first feedback is NDP, the feedback type of the second feedback may include one or more of the following: NDP, CSI (such as compressed CSI or uncompressed CSI), or measurement result. However, if the feedback type of the first feedback is CSI, the feedback type of the second feedback may include one or more of the following: CSI or measurement result, but not NDP.

[0189] S602: The first device sends a first frame, and the second device receives the first frame.

[0190] Among them, the first frame includes first information, which can be carried in one or more of the following: signaling in the perception establishment phase, such as a perception establishment request message, a perception establishment reception message, or signaling in the perception measurement phase, such as a perception request message, to achieve signaling multiplexing, thereby reducing communication overhead and improving communication efficiency.

[0191] Furthermore, the first device can send the first frame, so that the second device can receive the first frame. In this way, the second device can determine the feedback type of the first feedback and / or the feedback type of the second feedback based on the first information in the first frame. For specific implementation, please refer to the relevant introduction of the second application scenario below and will not be repeated here.

[0192] Optionally, in the first application scenario, the first frame may further include mode indication information. This mode indication information may be used to indicate whether the first information indicates any of the following: the feedback type of the first feedback, the feedback type of the second feedback, or both the feedback type of the first feedback and the feedback type of the second feedback. In this way, a receiving device, such as the second device, can accurately determine the indication content of the first information based on the mode indication information, thereby avoiding erroneous feedback caused by misidentification of the indication content of the first information, thereby improving measurement stability.

[0193] Optionally, in the second application scenario, after S602, the feedback indication method may further include: step 1, the second device sends the second information and / or the second information to the third device, and the third device receives the first information and / or the second information from the second device.

[0194] The second information can be independently indicated, that is, the content indicated by the second information is independent of the content indicated by the first information and can be the same or different. Alternatively, the second information can be used in conjunction with the first information to indicate, for example, the second information can be used to indicate the feedback type of other feedback, or to indicate that the feedback type of other feedback is determined by another device. The other feedback can be feedback not indicated by the first information among all feedback, and / or the first information indicates feedback determined by another device.

[0195] For example, taking the first feedback and the second feedback as an example, if the first information does not indicate the feedback type of the first feedback, or indicates that the feedback type of the first feedback includes: the feedback type is determined by the perception transmitting end (the second device), then the second information may indicate any of the following: the specific feedback type of the first feedback (including at least one of the following: uncompressed CSI, compressed CSI, NDP, or perception measurement result), the feedback type of the first feedback is determined by the perception receiving end, i.e., the feedback type of the first feedback is determined by a third device, or the perception transmitting end does not determine the feedback type of the first feedback (the feedback type of the first feedback is determined by any device among the other devices). And / or, if the first information does not indicate the feedback type of the first feedback, or indicates that the feedback type of the second feedback includes: the feedback type is determined by the perception transmitting end (the second device), then the first information may also indicate any of the following: the feedback type of the second feedback is determined by the perception receiving end, i.e., the feedback type of the second feedback is determined by a third device, or the perception transmitting end (the second device) does not determine the feedback type of the second feedback (the feedback type of the second feedback is determined by any device among the other devices).

[0196] It should be understood that the specific implementation principle of the second information can refer to the relevant introduction of the first information in S601 and will not be repeated here. In addition, the first information and / or the second information sent by the second device can carry at least one of the following: signaling in the perception measurement phase, such as NDPA or NDP, or signaling in the perception reporting phase, such as feedback request messages, thereby realizing signaling multiplexing to reduce communication overhead and improve communication efficiency.

[0197] Furthermore, according to the relevant introduction in S601, there can be multiple ways to indicate the first information, such as the above-mentioned methods 1 to 15. Therefore, the second device can determine to send the first information and / or the second information based on the various indication methods in the above-mentioned methods 1 to 15, which are described in detail below.

[0198] Method 1:

[0199] In the first implementation, if the first information is only used to indicate the specific feedback type of the first feedback, the feedback type of the second feedback can be determined according to the protocol pre-definition, such as by the perception sending end, that is, the second device. In this way, on the one hand, the second device can forward the first information (including the above-mentioned first field and second field) to the third device based on the first information, or only send the first field without sending the second field to indicate the feedback type of the first feedback. On the other hand, the second device can determine the specific feedback type of the second feedback based on the second device status and / or the business needs of the second device, or the feedback type of the second feedback is determined by the perception receiving end, that is, the feedback type of the second feedback is determined by the third device, thereby sending the second information to the third device to indicate that the feedback type of the second feedback is determined by the third device. That is, in this case, the second device can send the first information and the second information to the third device. Among them, the first information and the second information can be sent in a package or separately, and there is no limitation on this.

[0200] In a second implementation, if the first information is used only to indicate the specific feedback type of the second feedback (including at least one of the following: uncompressed CSI, compressed CSI, NDP, or perception measurement result), the feedback type of the first feedback may be determined according to a protocol predefined definition, such as by the second device. In this way, the second device may determine the specific feedback type of the first feedback based on the second device state and / or the service requirements of the second device, or the feedback type of the first feedback may be determined by a third device, thereby sending the second information to the third device to indicate the specific feedback type of the first feedback, or the feedback type of the first feedback may be determined by the third device.

[0201] In a third implementation, the first information is used to indicate the specific feedback type of the first feedback and the specific feedback type of the second device. Thus, the second device can forward the first information to the third device based on the first information, or send only the first field without sending the second field to indicate the specific feedback type of the first feedback.

[0202] Method 2:

[0203] In the fourth implementation, the first information is only used to indicate that the feedback type of the first feedback is determined by the second device. In this way, on the one hand, the second device can determine the specific feedback type of the first feedback based on the first information, or the feedback type of the first feedback is determined by the third device, and thus send the second information to the third device to indicate the specific feedback type of the first feedback, or the feedback type of the first feedback is determined by the third device. On the other hand, for the second feedback not indicated by the first information, according to the relevant introduction in the above-mentioned first implementation, the second device can send the second information to the third device to indicate that the feedback type of the second feedback is determined by the third device. That is to say, in this case, the second information can be used to indicate the specific feedback type of the first feedback, or the feedback type of the first feedback is determined by the third device, and optionally, it can also be used to indicate that the feedback type of the second feedback is determined by the third device.

[0204] In the fifth implementation, the first information is only used to indicate that the feedback type of the second feedback is determined by the second device. In this way, on the one hand, the second device can determine the specific feedback type of the second feedback based on the first information, or the feedback type of the second feedback is determined by the third device, and thus send the second information to the third device to indicate that the feedback type of the second feedback is determined by the third device. On the other hand, for the first feedback not indicated by the first information, according to the relevant introduction in the above second implementation, the second device can send the second information to the third device to indicate the specific feedback type of the first feedback, or the feedback type of the first feedback is determined by the third device. That is to say, in this case, the second information can be used to indicate that the feedback type of the second feedback is determined by the third device, and optionally, it can also be used to indicate the specific feedback type of the first feedback, or the feedback type of the first feedback is determined by the third device.

[0205] In a sixth implementation, the first information is used to indicate that the feedback type of the first feedback and the feedback type of the second feedback are both determined by the second device. In this way, the second device can determine the specific feedback type of the first feedback based on the first information, or the feedback type of the first feedback is determined by the third device. Furthermore, the second device can also determine the specific feedback type of the second feedback based on the first information, or the feedback type of the second feedback is determined by the third device. Thus, the second device can send second information to the third device to indicate the specific feedback type of the first feedback, or the feedback type of the first feedback is determined by the third device, and optionally, to indicate that the feedback type of the second feedback is determined by the third device.

[0206] Method 3:

[0207] In the seventh implementation, the first information is used only to indicate that the feedback type of the first feedback is determined by the third device. Thus, on the one hand, the second device can forward the first information to the third device based on the first information, or send only the first field without sending the second field to indicate that the feedback type of the first feedback is determined by the third device. On the other hand, for the second feedback not indicated by the first information, as described in the first implementation above, the second device can send second information to the third device to indicate that the feedback type of the second feedback is determined by the third device.

[0208] In the eighth implementation, the first information is used only to indicate that the feedback type of the second feedback is determined by the third device. Thus, on the one hand, the second device can forward the first information to the third device based on the first information, or send only the second field without sending the first field to indicate that the feedback type of the second feedback is determined by the third device. On the other hand, for first feedback not indicated by the first information, as described in the second implementation above, the second device can send second information to the third device to indicate the specific feedback type of the first feedback, or to indicate that the feedback type of the first feedback is determined by the third device.

[0209] In a ninth implementation, the first information is used to indicate that the feedback type of the first feedback and the feedback type of the second feedback are both determined by a third device. In this manner, the second device can forward the first information to the third device based on the first information, indicating that the feedback type of the first feedback and the feedback type of the second feedback are both determined by the third device.

[0210] Method 4:

[0211] The first information is used to indicate that the feedback type of the first feedback is determined by the second device, and the feedback type of the second feedback is determined by the third device. In this way, on the one hand, the second device can determine the specific feedback type of the first feedback based on the first information, or the feedback type of the first feedback is determined by the third device, and then send the second information to the third device to indicate the specific feedback type of the first feedback, or the feedback type of the first feedback is determined by the third device. On the other hand, the second device can forward the first information to the third device based on the first information, or only send the second field without sending the first field to indicate that the feedback type of the second feedback is determined by the third device.

[0212] Method 5:

[0213] The first information is used to indicate that the feedback type of the second feedback is determined by the second device, and that the feedback type of the first feedback is determined by the third device. In this way, on the one hand, the second device can determine the specific feedback type of the second feedback based on the first information, or that the feedback type of the second feedback is determined by the third device, and thus send the second information to the third device to indicate that the feedback type of the second feedback is determined by the third device. On the other hand, the second device can forward the first information to the third device based on the first information, or send only the first field without sending the second field to indicate that the feedback type of the first feedback is determined by the third device.

[0214] Method 6:

[0215] The first information is used to indicate the specific feedback type of the first feedback, and the feedback type of the second feedback is determined by the second device. Thus, on the one hand, the second device can forward the first information to the third device based on the first information, or send only the first field without sending the second field to indicate the specific feedback type of the first feedback. On the other hand, the second device can determine the specific feedback type of the second feedback based on the first information, or the feedback type of the second feedback is determined by the third device, and thus send the second information to the third device to indicate that the feedback type of the second feedback is determined by the third device.

[0216] Method 7:

[0217] The first information is used to indicate the specific feedback type of the second feedback, and the feedback type of the first feedback is determined by the second device. In this way, the second device can determine the specific feedback type of the first feedback based on the first information, or the feedback type of the first feedback is determined by the third device, and then send the second information to the third device to indicate the specific feedback type of the first feedback, or the feedback type of the first feedback is determined by the third device.

[0218] Method 8:

[0219] The first information is used to indicate the specific feedback type of the first feedback, and the feedback type of the second feedback is determined by the third device. In this way, the second device can forward the first information to the third device based on the first information to indicate the specific feedback type of the first feedback, and the feedback type of the second feedback is determined by the third device.

[0220] Method 9:

[0221] The first information is used to indicate the specific feedback type of the second feedback, and the feedback type of the first feedback is determined by the third device. In this way, the second device can forward the first information to the third device based on the first information, or send only the first field without sending the second field to indicate that the feedback type of the first feedback is determined by the third device.

[0222] Method 10:

[0223] The first information is used to indicate the specific feedback type of the first feedback, and the feedback type of the second feedback is determined by any device of the second device and the third device. In this way, on the one hand, the second device can forward the first information to the third device based on the first information, or only send the first field without sending the second field to indicate the specific feedback type of the first feedback. On the other hand, the second device can determine the specific feedback type of the second feedback based on the first information, the feedback type of the second feedback is determined by the third device, or the second device does not determine the feedback type of the second feedback. Among them, if the feedback type of the second feedback is determined by the third device, or the second device is not sure of the feedback type of the second feedback, the second device can also send the second information to the third device to indicate that the feedback type of the second feedback is determined by the third device, or the second device is not sure of the feedback type of the second feedback.

[0224] Method 11:

[0225] The first information can be used to indicate that the feedback type of the first feedback is determined by the second device, and the feedback type of the second feedback is determined by any device of the second device and the third device. In this way, on the one hand, the second device can determine the specific feedback type of the first feedback based on the first information, or the feedback type of the first feedback is determined by the third device, and thus send the second information to the third device to indicate the specific feedback type of the first feedback, or the feedback type of the first feedback is determined by the third device. On the other hand, for the second feedback, according to the relevant introduction of method 10 in the second application scenario, the second device can send the second information to the third device to indicate that the feedback type of the second feedback is determined by the third device, or the second device does not determine the feedback type of the second feedback. In other words, in this case, the second information can be used to indicate the specific feedback type of the first feedback, or the feedback type of the first feedback is determined by the third device. Optionally, it can also be used to indicate that the feedback type of the second feedback is determined by the third device, or the second device does not determine the feedback type of the second feedback.

[0226] Method 12:

[0227] The first information is used to indicate that the feedback type of the first feedback is determined by the third device, and the feedback type of the second feedback is determined by any of the second and third devices. In this way, on the one hand, the second device can forward the first information to the third device based on the first information, or only send the first field without sending the second field to indicate that the feedback type of the first feedback is determined by the third device. On the other hand, for the second feedback, according to the relevant introduction of method 10 in the second application scenario, the second device can send the second information to the third device to indicate that the feedback type of the second feedback is determined by the third device, or the second device cannot determine the feedback type of the second feedback.

[0228] Method 13:

[0229] The first information is used to indicate the specific feedback type of the second feedback, and the feedback type of the first feedback is determined by any of the second device and the third device. In this way, the second device can determine the specific feedback type of the first feedback, the feedback type of the first feedback is determined by the third device, or the second device is unsure of the feedback type of the first feedback based on the first information, and then send the second information to the third device to indicate the specific feedback type of the first feedback, the feedback type of the first feedback is determined by the third device, or the second device is unsure of the feedback type of the first feedback.

[0230] Method 14:

[0231] The first information is used to indicate that the feedback type of the second feedback is determined by the second device, and the feedback type of the first feedback is determined by any device of the second device and the third device. In this way, on the one hand, the second device can determine the specific feedback type of the second feedback based on the first information, or the feedback type of the second feedback is determined by the third device, and thus send the second information to the third device to indicate that the feedback type of the second feedback is determined by the third device. On the other hand, for the first feedback, according to the relevant introduction of method 13 in the second application scenario, the second device can send the second information to the third device to indicate the specific feedback type of the first feedback, the feedback type of the first feedback is determined by the third device, or the second device is not sure of the feedback type of the first feedback. In other words, in this case, the second information can be used to indicate the specific feedback type of the first feedback, the feedback type of the first feedback is determined by the third device, or the second device is not sure of the feedback type of the first feedback, and optionally, it is also used to indicate that the feedback type of the second feedback is determined by the third device.

[0232] Method 15:

[0233] In the tenth implementation, the first information is only used to indicate that the feedback type of the first feedback is determined by any device of the second device and the third device. In this way, on the one hand, for the first feedback, according to the relevant introduction of method 13 in the second application scenario, the second device can send second information to the third device to indicate the specific feedback type of the first feedback, the feedback type of the first feedback is determined by the third device, or the second device is not sure of the feedback type of the first feedback. On the other hand, for the second feedback not indicated by the first information, according to the relevant introduction in the above-mentioned first implementation, the second device can send second information to the third device to indicate that the feedback type of the second feedback is determined by the third device. That is, in this case, the second information can be used to indicate the specific feedback type of the first feedback, the feedback type of the first feedback is determined by the third device, or the second device is not sure of the feedback type of the first feedback. Optionally, it can also be used to indicate that the feedback type of the second feedback is determined by the third device.

[0234] In the eleventh implementation manner, the first information is only used to indicate that the feedback type of the second feedback is determined by any device of the second device and the third device. In this way, on the one hand, for the second feedback, according to the relevant introduction of method 10 in the second application scenario, the second device can send the second information to the third device to indicate that the feedback type of the second feedback is determined by the third device, or the second device does not determine the feedback type of the second feedback. On the other hand, for the first feedback not indicated by the first information, according to the relevant introduction in the above-mentioned second implementation manner, the second device can send the second information to the third device to indicate the specific feedback type of the first feedback, or the feedback type of the first feedback is determined by the third device. That is to say, in this case, the second information can be used to indicate that the feedback type of the second feedback is determined by the third device, or the second device does not determine the feedback type of the second feedback. Optionally, it can also be used to indicate the specific feedback type of the first feedback, or the feedback type of the first feedback is determined by the third device.

[0235] In the twelfth implementation, the first information is used to indicate that the feedback type of the first feedback is determined by any of the second and third devices, and the feedback type of the second feedback is determined by any of the second and third devices. Thus, the specific implementation of the first feedback can refer to the tenth implementation above, and the specific implementation of the second feedback can refer to the eleventh implementation above.

[0236] As can be seen, in the second application scenario described above, in Methods 1 to 15, if the second device only needs to indicate the feedback type of the first feedback, the second device can send only the first field without sending the second field. Similarly, if the second device only needs to indicate the feedback type of the second feedback, the second device can send only the second field without sending the first field. This avoids sending redundant information, thereby reducing communication overhead and improving communication efficiency.

[0237] Optionally, in combination with the above-mentioned second application scenario, in the second application scenario, after step 1, the feedback indication method may further include: step 2, the third device sends third information to the second device, and the second device receives the third information from the third device.

[0238] Among them, the third information can be used to indicate that the feedback type of the second feedback includes at least one of the following: uncompressed CSI, compressed CSI, NDP, or perception measurement result, that is, indicating the specific feedback type of the second feedback, which can be carried in the signaling of the perception reporting stage, such as in the above-mentioned first feedback, to achieve signaling multiplexing, reduce communication overhead, and improve communication efficiency.

[0239] Specifically, in combination with the above S601 and the relevant introduction in Methods 1 to 15 of the above second application scenario, it can be seen that if the first information and / or second information sent by the second device to the third device is used to indicate that the feedback type of the second feedback is determined by the third device, then the third device can determine the specific feedback type of the second feedback based on the state of the third device and / or the business needs of the third device, and thus send the third information to the second device to indicate the specific feedback type of the second feedback. In addition, if the first information and / or second information sent by the second device to the third device is also used to indicate that the feedback type of the first feedback is determined by the third device, then the third device can also determine the specific feedback type of the first feedback based on the state of the third device and / or the business needs of the third device.

[0240] It should be understood that the above S601-S602, as well as the above first and third application scenarios, are examples of interactions between the first, second, and third devices and are not intended to be limiting. For example, the second device may generate the first information and send it to the first and third devices. For another example, the third device may generate the first information and send it to the second device, so that the second device can send the first information to the first device.

[0241] The above describes in detail the overall process of the feedback indication method provided in the embodiment of the present application in combination with Figure 6. The following describes in detail the process of the feedback indication method shown in Figure 6 in scenarios A to C in combination with Figures 7 to 22.

[0242] Scenario A:

[0243] For example, Figure 7 is a schematic diagram of the architecture of Scenario A, and Figure 8 is a flowchart diagram of the feedback indication method in Scenario A. As shown in Figures 7 and 8, the devices performing the method may include: a first device and a second device. The first device may be a perception initiator, which is a perception receiver. The second device may be a perception responder, which is a perception transmitter, and there may be one or more of them. Thus, the feedback indication method may include two levels of feedback: the first level of feedback is the first feedback sent by the first device to the second device, and the second level of feedback is the second feedback sent by the second device to the first device. In this case, there are three ways to determine the feedback type (determination methods 1-3): Determination method 1: The first device determines the specific feedback type of the first feedback and the second feedback. Determination method 2: The first device determines the specific feedback type of the first feedback, and the second device determines the specific feedback type of the second feedback. Determination method 3: The first device determines the specific feedback type of the second feedback, and the second device determines the specific feedback type of the first feedback. The following details the corresponding processes of each of the above determination methods 1-3.

[0244] Determination method 1:

[0245] FIG9 is a second flow chart of the feedback indication method in scenario A. As shown in FIG9 , taking the perception measurement phase and the perception reporting phase as an example, the steps of the feedback indication method may include:

[0246] S901: A first device sends a perception request message to a second device, and the second device receives the perception request message from the first device.

[0247] The perception request message may include the first information. The first information includes a first field and a second field. The first field may be used to indicate a specific feedback type of the first feedback, such as CSI, and the second field may be used to indicate a specific feedback type of the second feedback, such as a perception measurement result. For specific implementation, reference may be made to the relevant introduction in S601-S602 above, which will not be repeated here.

[0248] Optionally, the perception request message may also include the above-mentioned mode indication information. For specific implementation, please refer to the relevant introduction in the above-mentioned first application scenario, which will not be repeated here.

[0249] S902: The second device sends an NDPA.

[0250] As shown in Figure 8, after receiving the perception request message, the second device can send NDPA according to the perception request message, such as sending NDPA after a SIFS after receiving the perception request message. In addition, the specific implementation of NDPA can refer to the relevant introduction of S202 above, which will not be repeated here.

[0251] S903: The second device sends an NDP.

[0252] As shown in FIG8 , the second device may send the NDP after a SIFS after sending the NDPA.

[0253] It should be noted that the NDPA and NDP sent by the second device may carry the above-mentioned first information or may not carry the first information, and there is no limitation on this.

[0254] S904: The first device sends first feedback to the second device, and the second device receives the first feedback from the first device.

[0255] The first device may determine the first feedback, such as CSI, according to the specific feedback type indicated by the first field.

[0256] In addition, as shown in Figure 8, since the first device is not only a perception initiator but also a perception receiver, the first device can send a first feedback to the second device, which is a perception responder of the perception sender, such as after sending the NDP, sending the first feedback after a SIFS.

[0257] S905: The second device sends second feedback to the first device, and the first device receives the second feedback from the second device.

[0258] As shown in Figure 8, the second device can determine the second feedback, such as the perception measurement result, based on the specific feedback type indicated by the second field, such as the perception measurement result, and the first feedback, such as CSI. For specific implementation, please refer to the relevant introduction in the second application scenario above and will not be repeated here. In this way, after receiving the first feedback, the second device can send the second feedback to the second device after one SIFS.

[0259] Determination method 2:

[0260] FIG10 is a flow chart of the third method for feedback indication in scenario A. As shown in FIG10 , taking the perception measurement phase and the perception reporting phase as an example, the steps of the feedback indication method may include:

[0261] S1001: A first device sends a perception request message to a second device, and the second device receives the perception request message from the first device.

[0262] Among them, the perception request message may include the first field in the above-mentioned first information, and the first field can be used to indicate the specific feedback type of the first feedback, such as CSI. The specific implementation can refer to the relevant introduction in the above-mentioned S601-S602, which will not be repeated here.

[0263] Optionally, the perception request message may also include the above-mentioned mode indication information. For specific implementation, please refer to the relevant introduction in the above-mentioned first application scenario, which will not be repeated here.

[0264] S1002: The second device sends an NDPA.

[0265] S1003: The second device sends an NDP.

[0266] Among them, the specific implementation of S1002 can refer to the relevant introduction of S202 and S902 above, and the specific implementation of S1003 can refer to the relevant introduction of S202 and S903 above, which will not be repeated here.

[0267] S1004: The first device sends first feedback to the second device, and the second device receives the first feedback from the first device.

[0268] As shown in FIG8 , the first device may determine the first feedback, such as CSI, according to the specific feedback type indicated by the first field, so as to send the first feedback to the second device after a SIFS after sending the NDP.

[0269] The first feedback may include the second field in the first information, which is used to indicate that the feedback type of the second feedback is determined by the second device. For specific implementation, please refer to the relevant introduction in S601-S602 above, which will not be repeated here.

[0270] In other words, the first feedback and the second feedback can be indicated separately, such as indicating the first feedback through a perception request message and indicating the second feedback through the first feedback, so as to avoid packet loss due to a single data packet sent being too large, thereby improving the reliability of communication.

[0271] It should be understood that the above-mentioned separate indication method is only an example and is not intended to be limiting. For example, the first feedback and the second feedback may also be combined into an indication, such as the perception request message may also include a first field and a second field.

[0272] S1005: The second device determines a specific feedback type of the second feedback according to the first information.

[0273] The second device can determine the specific feedback type of the second feedback based on the second field in the first information, such as a perception measurement result. For specific implementation, please refer to the relevant description in the second application scenario above and will not be repeated here. In this way, the second device can determine the second feedback, i.e., the perception measurement result, based on the received first feedback, such as CSI, and the specific feedback type of the second feedback.

[0274] S1006: The second device sends second feedback to the first device, and the first device receives the feedback from the second device.

[0275] As shown in FIG8 , after receiving the first feedback, the second device may send the second feedback to the second device after a SIFS.

[0276] Determination method 3:

[0277] FIG11 is a fourth flow chart of the feedback indication method in scenario A. As shown in FIG11 , taking the perception measurement phase and the perception reporting phase as an example, the steps of the feedback indication method may include:

[0278] S1101: A first device sends a perception request message to a second device, and the second device receives the perception request message from the first device.

[0279] The perception request message may include the first field and the second field in the first information. The first field may be used to indicate that the feedback type of the first feedback is determined by the second device, and the second field may be used to indicate the specific feedback type of the second feedback, such as a perception measurement result. For specific implementation, reference may be made to the relevant description in S601-S602 above, and will not be repeated here.

[0280] Optionally, the perception request message may also include the above-mentioned mode indication information. For specific implementation, please refer to the relevant introduction in the above-mentioned first application scenario, which will not be repeated here.

[0281] S1102: The second device determines a specific feedback type of the first feedback according to the first information.

[0282] Among them, after the second device receives the perception request message, it can determine the specific feedback type of the first feedback based on the first field in the first information, such as CSI. The specific implementation can refer to the relevant introduction in the above-mentioned second application scenario, which will not be repeated here.

[0283] S1103: The second device sends an NDPA.

[0284] S1104: The second device sends an NDP.

[0285] The second information may be carried in the NDPA sent by the second device to indicate the specific feedback type of the first feedback, but is not limited thereto, and may also be carried in the NDP. In other words, S1102 may be performed before S1104.

[0286] In addition, the specific implementation of S1103-S1104 can refer to the relevant introduction of S202, S902-S903 above, which will not be repeated here.

[0287] S1105: The first device sends first feedback to the second device, and the second device receives the first feedback from the first device.

[0288] As shown in FIG8 , the first device may determine the first feedback, such as CSI, according to the specific feedback type indicated by the second information, so as to send the first feedback after a SIFS after sending the NDP.

[0289] S1106: The second device sends second feedback to the first device, and the first device receives the feedback from the second device.

[0290] As shown in Figure 8, the second device can determine the second feedback, i.e., the perception measurement result, based on the specific feedback type indicated by the second field, such as the perception measurement result, and the first feedback, such as CSI. For specific implementation, please refer to the relevant introduction in the second application scenario above and will not be repeated here. In this way, after receiving the first feedback, the second device can send the second feedback after a SIFS.

[0291] It should be understood that in the above scenario A, in addition to the above determination methods AC, there may be other determination methods, such as the second device determining the specific feedback type of the first feedback and the specific feedback type of the second feedback. For specific implementation, please refer to the relevant introduction in the above determination methods AC, which will not be repeated here.

[0292] Scenario B:

[0293] For example, Figure 12 is a schematic diagram of the architecture of Scenario B, and Figure 13 is a flowchart diagram of the feedback indication method in Scenario B. As shown in Figures 12 and 13, the devices performing the method may include: a first device, a second device, and a third device. The second device is connected to the first and third devices, and optionally, the third device may be connected to the first device. The first device may be a perception initiator, the second device may be a perception responder that is a perception transmitter, and the third device may be a perception responder that is a perception receiver. Both the second and third devices may be one or more. Thus, the feedback indication method may include two levels of feedback: the first level of feedback is first feedback sent by the third device to the first or second device, and the second level of feedback is second feedback sent by the second device to the first device. In this case, three determination methods (determination methods 4-6) are possible: Determination method 4: The first device determines the specific feedback type of the first feedback and the specific feedback type of the second feedback. Determination method 5: The first device determines the specific feedback type of the first feedback, and the second device determines the specific feedback type of the second feedback. Determination method 6: The first device determines the specific feedback type of the second feedback, and the second device determines the specific feedback type of the first feedback. The following describes in detail the processes corresponding to the above determination methods 4-6.

[0294] Determination method 4:

[0295] FIG14 is a second flow chart of the feedback indication method in scenario B. As shown in FIG14 , taking the perception measurement phase and the perception reporting phase as an example, the steps of the feedback indication method may include:

[0296] S1401: The first device sends a perception request message to the second device, and the second device receives the perception request message from the first device.

[0297] The perception request message may include the first information. The first information may include a first field and a second field. The first field may be used to indicate a specific feedback type of the first feedback, such as CSI, and the second field may be used to indicate a specific feedback type of the second feedback, such as a perception measurement result. For specific implementation, reference may be made to the relevant introduction in S601-S602 above, which will not be repeated here.

[0298] Optionally, the perception request message may also include the above-mentioned mode indication information. For specific implementation, please refer to the relevant introduction in the above-mentioned first application scenario, which will not be repeated here.

[0299] S1402: The second device sends an NDPA.

[0300] As shown in Figure 13, after the second device receives the perception request message, it can send NDPA after a SIFS based on the perception request message. For specific implementation, please refer to the relevant introduction of S202 above, which will not be repeated here.

[0301] S1403: The second device sends an NDP.

[0302] As shown in FIG13 , the second device may send the NDP after a SIFS after sending the NDPA.

[0303] S1404: The second device sends a feedback request message.

[0304] As shown in FIG13 , the second device may send a feedback request message after a SIFS after sending the NDP. For the specific implementation of the feedback request message, reference may be made to the relevant introduction in the above S205 .

[0305] S1405: The third device sends first feedback to the second device, and the third device receives the first feedback from the second device.

[0306] S1406: The third device sends first feedback to the first device, and the third device receives the first feedback from the first device.

[0307] The first device may determine the first feedback, such as CSI, according to the specific feedback type indicated by the first field.

[0308] In addition, S1405 and S1406 are optional steps. Specifically, as shown in Figure 13, if the third device is not directly connected to the first device, the third device can send the first feedback to the second device, such as after receiving the NDP, and then send the first feedback after a SIFS, that is, executing S1405. Alternatively, if the third device is directly connected to the first device, the third device can send the first feedback to the first device, that is, executing S1406.

[0309] S1407: The second device sends second feedback to the first device, and the first device receives the second feedback from the second device.

[0310] As shown in Figure 13, the second device can determine the second feedback, i.e., the perception measurement result, based on the specific feedback type indicated by the second field, such as the perception measurement result, and the first feedback, such as CSI. For specific implementation, please refer to the relevant introduction in the second application scenario above and will not be repeated here. In this way, after receiving the first feedback, the second device can send the second feedback after a SIFS.

[0311] Determination method 5:

[0312] FIG15 is a flow chart of the third method for feedback indication in scenario B. As shown in FIG15 , taking the perception measurement phase and the perception reporting phase as an example, the steps of the feedback indication method may include:

[0313] S1501: A first device sends a perception request message to a second device, and the second device receives the perception request message from the first device.

[0314] The perception request message may include the first field and the second field in the first information. The first field may be used to indicate the specific feedback type of the first feedback, such as CSI, and the second field may be used to indicate that the feedback type of the second feedback is determined by the second device. For specific implementation, reference may be made to the relevant introduction in S601-S602 above, which will not be repeated here.

[0315] Optionally, the perception request message may also include the above-mentioned mode indication information. For specific implementation, please refer to the relevant introduction in the above-mentioned first application scenario, which will not be repeated here.

[0316] S1502: The second device sends an NDPA.

[0317] S1503: The second device sends an NDP.

[0318] S1504: The second device sends a feedback request message.

[0319] Among them, the above-mentioned first information (including the first field and the second field), or only the first field in the first information, is carried in the NDPA sent by the second device to indicate the specific feedback type of the first feedback, but is not limited to it. For example, it can also be carried in the NDP sent by the second device and the feedback request message.

[0320] In addition, the specific implementation of S1502-S1504 can refer to the relevant introduction in the above S202, S205, S1402-S1404, which will not be repeated here.

[0321] S1505: The third device sends first feedback to the second device, and the third device receives the first feedback from the second device.

[0322] S1506: The third device sends first feedback to the first device, and the third device receives the first feedback from the first device.

[0323] The first device may determine the first feedback, such as CSI, according to the specific feedback type indicated by the first field.

[0324] In addition, S1505 and S1506 are optional steps. For specific implementation, please refer to the relevant introduction in the above S1405 and S1406, which will not be repeated here.

[0325] S1507: The second device determines a specific feedback type of the second feedback according to the first information.

[0326] The second device can determine the specific feedback type of the second feedback based on the second field in the first information, such as a perception measurement result. For specific implementation, please refer to the relevant description in the second application scenario above and will not be repeated here. In this way, the second device can determine the second feedback, i.e., the perception measurement result, based on the received first feedback, such as CSI, and the specific feedback type of the second feedback.

[0327] It should be noted that the execution order between S1507 and S1502-S1506 is not limited.

[0328] S1508: The second device sends second feedback to the first device, and the first device receives the second feedback from the second device.

[0329] The specific implementation of S1508 may refer to the relevant introduction in the above S1407 and will not be repeated here.

[0330] Determination method 6:

[0331] FIG16 is a fourth flow chart of the feedback indication method in scenario B. As shown in FIG16 , taking the perception measurement phase and the perception reporting phase as an example, the steps of the feedback indication method may include:

[0332] S1601: The first device sends a perception request message to the second device, and the second device receives the perception request message from the first device.

[0333] The perception request message may include the first field and the second field in the first information. The first field may be used to indicate that the feedback type of the first feedback is determined by the second device, and the second field may be used to indicate the specific feedback type of the second feedback, such as a perception measurement result. For specific implementation, reference may be made to the relevant description in S601-S602 above, and will not be repeated here.

[0334] Optionally, the perception request message may also include the above-mentioned mode indication information. For specific implementation, please refer to the relevant introduction in the above-mentioned first application scenario, which will not be repeated here.

[0335] S1602: The second device determines a specific feedback type of the first feedback according to the first information.

[0336] Among them, after the second device receives the perception request message, it can determine the specific feedback type of the first feedback based on the first field in the first information, such as CSI. The specific implementation can refer to the relevant introduction in the above-mentioned second application scenario, which will not be repeated here.

[0337] S1603: The second device sends an NDPA.

[0338] S1604: The second device sends an NDP.

[0339] S1605: The second device sends a feedback request message.

[0340] The second information may be carried in the NDPA sent by the second device to indicate the specific feedback type of the first feedback, but is not limited thereto. For example, the second information may also be carried in the NDP sent by the second device and the feedback request message. In other words, S1602 may be executed before S1605.

[0341] In addition, the specific implementation of S1603-S1605 can refer to the relevant introduction in the above S202, S205, S1402-S1404, which will not be repeated here.

[0342] S1606: The third device sends first feedback to the second device, and the third device receives the first feedback from the second device.

[0343] S1607: The third device sends first feedback to the first device, and the third device receives the first feedback from the first device.

[0344] Among them, the first device can determine the first feedback according to the specific feedback type indicated by the first field, such as CSI. The specific implementation can refer to the relevant introduction in the above second application scenario, which will not be repeated here.

[0345] In addition, S1606 and S1607 are optional steps. For specific implementation, please refer to the relevant introduction in the above S1405 and S1406, which will not be repeated here.

[0346] S1608: The second device sends second feedback to the first device, and the first device receives the second feedback from the second device.

[0347] For the specific implementation of S1608, please refer to the relevant introduction in S1407 above, which will not be repeated here.

[0348] It should be understood that in the above scenario B, in addition to the above determination methods 4-6, there may be other determination methods, such as the second device determining the specific feedback type of the first feedback and the specific feedback type of the second feedback, and the second device determining the specific feedback type of the first feedback, and the third device determining the specific feedback type of the second feedback, etc. For specific implementation, please refer to the relevant introduction in the above determination methods 4-6, which will not be repeated here.

[0349] Scenario C:

[0350] For example, Figure 17 is a schematic diagram of the architecture of scenario C, and Figure 18 is a flowchart diagram of the feedback indication method in scenario C. As shown in Figures 17 and 18, the devices performing the method may include: a first device, a second device, and a third device. The second device is connected to the first and third devices. The first device may be a perception initiator, the second device may be a perception responder that is a perception receiver, and the third device may be a perception responder that is a perception transmitter. Both the second and third devices may be one or more. Thus, the feedback indication method may include three levels of feedback: the first level of feedback is the first feedback sent by the second device to the third device, the second level of feedback is the second feedback sent by the third device to the second device, and the third level of feedback is the third feedback sent by the second device to the first device. In this case, four determination methods (determination methods 7-10) are possible: determination method 7: the first device determines the specific feedback type of the first feedback, the specific feedback type of the second feedback, and the specific feedback type of the third feedback. Determination method 8: the first device determines the specific feedback type of the first feedback and the specific feedback type of the second feedback, and the second device determines the specific feedback type of the third feedback. Determination Method 9: The first device determines the specific feedback type of the first feedback and the specific feedback type of the third feedback, and the second device determines the specific feedback type of the second feedback. Determination Method 10: The first device determines the specific feedback type of the second feedback and the specific feedback type of the third feedback, and the third device determines the specific feedback type of the first feedback. The following details the corresponding processes of Determination Methods 7-10.

[0351] Determination method 7:

[0352] FIG19 is a second flow chart of the feedback indication method in scenario C. As shown in FIG19 , taking the perception measurement phase and the perception reporting phase as an example, the steps of the feedback indication method may include:

[0353] S1901: The first device sends a perception request message to the second device, and the second device receives the perception request message from the first device.

[0354] The perception request message may include the first information. The first information may include a first field, a second field, and a third field. The first field may be used to indicate a specific feedback type of the first feedback, such as uncompressed CSI. The second field may be used to indicate a specific feedback type of the second feedback, such as compressed CSI. The third field may be used to indicate a specific feedback type of the third feedback, such as a perception measurement result. For specific implementation, reference may be made to the relevant description in S601-S602 above, and will not be repeated here.

[0355] Optionally, the perception request message may also include the above-mentioned mode indication information. For specific implementation, please refer to the relevant introduction in the above-mentioned first application scenario, which will not be repeated here.

[0356] S1902: The second device sends a perception request message to the third device, and the third device receives the perception request message from the second device.

[0357] As shown in Figure 18, since the second device is a perception receiving end and the third device is a perception sending end, the second device needs to forward the perception request message to the third device. For example, after receiving the perception request message, it resends the perception request message after a SIFS. The perception request message forwarded by the second device may include the first field, the second field, and the third field in the first information, or may only include the second field, without limitation.

[0358] S1903: The third device sends an NDPA.

[0359] As shown in Figure 18, after the third device receives the perception request message, it can send NDPA after a SIFS based on the perception request message. For specific implementation, please refer to the relevant introduction of S202 above, which will not be repeated here.

[0360] S1904: The third device sends an NDP.

[0361] As shown in FIG18 , the third device may send the NDP after a SIFS after sending the NDPA.

[0362] S1905: The third device sends a feedback request message.

[0363] As shown in FIG18 , the third device may send a feedback request message after a SIFS after sending the NDP. For the specific implementation of the feedback request message, reference may be made to the relevant introduction in the above S205 .

[0364] S1906: The second device sends first feedback to the third device, and the third device receives the first feedback from the second device.

[0365] As shown in Figure 18, the third device can determine the first feedback based on the specific feedback type indicated by the first field, such as uncompressed CSI. For specific implementation, please refer to the relevant introduction in the second application scenario above and will not be repeated here. In this way, after receiving the feedback request message, the third device can send the first feedback after a SIFS.

[0366] S1907: The third device sends second feedback to the second device, and the second device receives the second feedback from the third device.

[0367] As shown in Figure 18, the second device can determine the second feedback, i.e., compressed CSI, based on the specific feedback type indicated by the second field, such as compressed CSI, and the first feedback, such as uncompressed CSI. For specific implementation, please refer to the relevant introduction in the second application scenario above and will not be repeated here. In this way, after receiving the first feedback, the second device can send the second feedback to the second device after one SIFS.

[0368] S1908: The second device sends third feedback to the first device, and the first device receives the third feedback from the second device.

[0369] As shown in Figure 18, the second device can determine the third feedback, i.e., the perceptual measurement result, based on the specific feedback type indicated by the above-mentioned third field, such as the perceptual measurement result, and the second feedback, such as compressed CSI, so as to send the third feedback after a SIFS after receiving the second feedback.

[0370] Determination method 8:

[0371] FIG20 is a flow chart of the third method for feedback indication in scenario C. As shown in FIG20 , taking the perception measurement phase and the perception reporting phase as an example, the steps of the feedback indication method may include:

[0372] S2001: The first device sends a perception request message to the second device, and the second device receives the perception request message from the first device.

[0373] The perception request message may include the first field and the second field in the first information, and also include a third field. The first field may be used to indicate a specific feedback type of the first feedback, such as uncompressed CSI; the second field may be used to indicate a specific feedback type of the second feedback, such as compressed CSI; and the third field may be used to indicate that the feedback type of the third feedback is determined by the second device. For specific implementation, reference may be made to the relevant introduction in S601-S602 above, and will not be repeated here.

[0374] Optionally, the perception request message may also include the above-mentioned mode indication information. For specific implementation, please refer to the relevant introduction in the above-mentioned first application scenario, which will not be repeated here.

[0375] S2002: The second device sends a perception request message to the third device, and the third device receives the perception request message from the second device.

[0376] Among them, the specific implementation of S2002 can refer to the relevant introduction in the above S1902, which will not be repeated here.

[0377] S2003: The third device sends an NDPA.

[0378] S2004: The third device sends an NDP.

[0379] S2005: The third device sends a feedback request message.

[0380] S2006: The second device sends first feedback to the third device, and the third device receives the first feedback from the second device.

[0381] S2007: The third device sends second feedback to the second device, and the second device receives the second feedback from the third device.

[0382] Among them, the specific implementation of S2003-S2007 can refer to the relevant introduction in the above S1903-S1907, which will not be repeated here.

[0383] S2008: The second device determines a specific feedback type of the third feedback based on the first information.

[0384] The second device can determine the specific feedback type of the third feedback based on the third field in the first information, such as a perception measurement result. For specific implementation, please refer to the relevant description in the second application scenario above and will not be repeated here. In this way, the second device can determine the third feedback, i.e., the perception measurement result, based on the received second feedback, such as CSI, and the specific feedback type of the third feedback. Furthermore, the order in which S2003-S2007 and S2008 are executed is not limited.

[0385] S2009: The second device sends third feedback to the first device, and the first device receives the third feedback from the second device.

[0386] Among them, the specific implementation of S2009 can refer to the relevant introduction in the above S1908, which will not be repeated here.

[0387] Determination method 9:

[0388] FIG21 is a fourth flow chart of the feedback indication method in scenario C. As shown in FIG21 , taking the perception measurement phase and the perception reporting phase as an example, the steps of the feedback indication method may include:

[0389] S2101: The first device sends a perception request message to the second device, and the second device receives the perception request message from the first device.

[0390] The perception request message may include the first field and the second field in the first information, and also include a third field. The first field may be used to indicate a specific feedback type of the first feedback, such as uncompressed CSI; the second field may be used to indicate that the feedback type of the second feedback is determined by the second device; and the third field may be used to indicate a specific feedback type of the third feedback, such as a perception measurement result. For specific implementation, reference may be made to the relevant introduction in S601-S602 above, which will not be repeated here.

[0391] Optionally, the perception request message may also include the above-mentioned mode indication information. For specific implementation, please refer to the relevant introduction in the above-mentioned first application scenario, which will not be repeated here.

[0392] S2102: The second device determines a specific feedback type of the second feedback based on the first information.

[0393] After receiving the perception request message, the second device may determine the specific feedback type of the second feedback based on the second field in the first information, such as compressed CSI. For specific implementation, please refer to the relevant introduction in the second application scenario above and will not be repeated here. In this way, the second device can generate second information to indicate the specific feedback type of the second feedback.

[0394] S2103: The second device sends a perception request message to the third device, and the third device receives the perception request message from the second device.

[0395] As shown in Figure 18, since the second device is a perception receiving end and the third device is a perception sending end, the second device needs to forward the perception request message to the third device. For example, after receiving the perception request message, it resends the perception request message after a SIFS. The perception request message forwarded by the second device may include the second information described above, or may include only any of the following of the first information described above: the first field, the second field and the third field, the first field and the second field, or the second field, without limitation.

[0396] S2104: The third device sends an NDPA.

[0397] S2105: The third device sends an NDP.

[0398] S2106: The third device sends a feedback request message.

[0399] S2107: The second device sends first feedback to the third device, and the third device receives the first feedback from the second device.

[0400] It should be understood that the second information may also be carried in the first feedback sent by the second device to the third device, and this is not limited to this. In other words, S2102 only needs to be executed before S2107.

[0401] S2108: The third device sends second feedback to the second device, and the second device receives the second feedback from the third device.

[0402] S2109: The second device sends third feedback to the first device, and the first device receives the third feedback from the second device.

[0403] Among them, the specific implementation of S2104-S2109 can refer to the relevant introduction in the above S1903-S1908, which will not be repeated here.

[0404] Determination method 10:

[0405] FIG22 is a fifth flow chart of the feedback indication method in scenario C. As shown in FIG22 , taking the perception measurement phase and the perception reporting phase as an example, the steps of the feedback indication method may include:

[0406] S2201: The first device sends a perception request message to the second device, and the second device receives the perception request message from the first device.

[0407] The perception request message may include the first field and the second field in the first information, and also include a third field. The first field may be used to indicate that the feedback type of the first feedback is determined by the third device, the second field may be used to indicate the specific feedback type of the second feedback, such as compressed CSI, and the third field may be used to indicate the specific feedback type of the third feedback, such as perception measurement results. For specific implementation, reference may be made to the relevant introduction in S601-S602 above, and will not be repeated here.

[0408] Optionally, the perception request message may also include the above-mentioned mode indication information. For specific implementation, please refer to the relevant introduction in the above-mentioned first application scenario, which will not be repeated here.

[0409] S2202: The second device sends a perception request message to the third device, and the third device receives the perception request message from the second device.

[0410] As shown in Figure 18, since the second device is a perception receiver and the third device is a perception transmitter, the second device needs to forward the perception request message to the third device. For example, after receiving the perception request message, it resends the perception request message after a SIFS. The perception request message forwarded by the second device may include only any of the following: the first field, the second field, and the third field, or the first field and the second field, without limitation.

[0411] S2203: The third device determines a specific feedback type of the first feedback according to the first information.

[0412] After receiving the perception request message, the third device may determine the specific feedback type of the first feedback based on the first field in the first information, such as uncompressed CSI. For specific implementation, please refer to the relevant introduction in the second application scenario above and will not be repeated here. In this way, the third device may generate second information to indicate the specific feedback type of the first feedback.

[0413] S2204: The third device sends an NDPA.

[0414] S2205: The third device sends an NDP.

[0415] S2206: The third device sends a feedback request message.

[0416] The second information may be carried in the NDPA sent by the second device to indicate the specific feedback type of the first feedback, but is not limited thereto. For example, it may also be carried in the NDP sent by the third device and the feedback request message. In other words, S2203 may be executed before S2206.

[0417] S2207: The second device sends first feedback to the third device, and the third device receives the first feedback from the second device.

[0418] S2208: The third device sends second feedback to the second device, and the second device receives the second feedback from the third device.

[0419] S2209: The second device sends third feedback to the first device, and the first device receives the third feedback from the second device.

[0420] Among them, the specific implementation of S2204-S2209 can refer to the relevant introduction in the above S1903-S1908, which will not be repeated here.

[0421] It should be understood that in the above scenario C, in addition to the above determination methods 7-10, there may be other determination methods, such as the second device determining the specific feedback type of the first feedback, the specific feedback type of the second feedback, and the specific feedback type of the third feedback, and the second device determining the specific feedback type of the first feedback, the third device determining the specific feedback type of the second feedback, and the specific feedback type of the third feedback, etc. For specific implementation, please refer to the relevant introduction in the above determination methods 7-10, which will not be repeated here.

[0422] Based on the methods shown in Figures 6-22, it can be seen that in scenarios with multiple devices and multiple interactions, by indicating the feedback types of multiple feedbacks at different levels through the first information, such as the feedback type of the first feedback, and / or the feedback type of the second feedback, a more comprehensive and accurate indication of the feedback type can be achieved, thereby improving the applicability of perception technology in scenarios with multiple devices and multiple interactions.

[0423] Second embodiment:

[0424] For example, Figure 23 is a second flow chart of the feedback indication method provided in an embodiment of the present application. The feedback indication method can be applied to two of the three devices shown in Figure 5, such as the first device, the second device, and the third device, and the communication between the first device and the second device. The first device can be a perception initiator, the second device can be a perception responder that is a perception transmitter, and the third device can be a perception responder that is a perception receiver.

[0425] As shown in FIG23 , the feedback indication method may include the following steps:

[0426] S2301: The first device sends fourth information, and the second device receives the fourth information.

[0427] Among them, the fourth information can be used to indicate that the first device needs to obtain all feedback or part of the feedback, such as the first feedback and / or the second feedback. The specific implementation of the first feedback and the second feedback can refer to the above-mentioned first embodiment and will not be repeated here.

[0428] Specifically, the fourth information may include multiple bits, such as 2 or 3 bits. In this way, the fourth information may indicate that the first device needs to obtain the first feedback and / or the second feedback through an index composed of multiple bits or a bit map of multiple bits, which are introduced below.

[0429] a. Index indication:

[0430] Multiple bits may form different indexes, and different indexes may indicate that the first device needs to obtain the first feedback and / or the second feedback, as shown in Table 7 below.

[0431] Table 7

[0432] Feedback that the index needs to obtain

[0433] 00 Need to get the first feedback 01 Need to get the second feedback 11 Need to get the first feedback and the second feedback

[0434] According to Table 7, the above index may include 2 bits to indicate the various feedbacks that the first device needs to obtain. In this way, the first device can traverse Table 7 to determine the index corresponding to the feedback that the first device needs to obtain, thereby generating fourth information carrying the index to indicate that the first device needs to obtain the feedback. For example, if the first device needs to obtain the first feedback, it traverses Table 7 to generate fourth information carrying index 00 to indicate that the first device needs to obtain the first feedback. For another example, if the first device needs to obtain the second feedback, it traverses Table 7 to generate fourth information carrying index 01 to indicate that the first device needs to obtain the second feedback. For another example, if the first device needs to obtain the first feedback and the second feedback, it traverses Table 7 to generate fourth information carrying index 11 to indicate that the first device needs to obtain the first feedback and the second feedback.

[0435] b. Bitmap indication:

[0436] The fourth information may include multiple bits, each of which may be used to indicate whether the first device needs to obtain a corresponding type of feedback, as shown in Table 8 below.

[0437] Table 8

[0438] Bitmap needs to obtain feedback 10 needs to obtain the first feedback 01 needs to obtain the second feedback 11 needs to obtain the first feedback and the second feedback

[0439] As can be seen from Table 8, the bitmap in Table 8 may include two bits. The two bits, in order from left to right, each bit can be used to indicate whether the first device needs to obtain a corresponding type of feedback. For example, the first bit can be used to indicate whether the first device needs to obtain first feedback. A value of 1 indicates that the first device needs to obtain first feedback, while a value of 0 indicates that the first device does not need to obtain first feedback. The second bit can be used to indicate whether the first device needs to obtain second feedback. A value of 1 indicates that the first device needs to obtain second feedback, while a value of 0 indicates that the first device does not need to obtain second feedback. Thus, if both the first and second bits are 1, it indicates that the first device needs to obtain both first and second feedback.

[0440] Furthermore, the above-mentioned fourth information can be carried in one or more of the following: signaling in the perception establishment phase, such as a perception establishment request message, a perception establishment reception message, or signaling in the perception measurement phase, such as a perception request message, to achieve signaling multiplexing, thereby reducing communication overhead and improving communication efficiency.

[0441] Optionally, if the fourth information indicates that the first device needs to obtain the first feedback, the second device may further send the fourth information to a third device (not shown in FIG23 ). In this way, if the third device is directly connected to the first device, the third device may send the first feedback directly to the first device based on the fourth information, so that the first device can obtain the first feedback more quickly, thereby reducing communication latency and improving communication efficiency.

[0442] S2302: The second device sends the first feedback and / or the second feedback according to the fourth information, and the first device receives the first feedback and / or the second feedback.

[0443] In which, after the first device sends the feedback request message, the second device can receive the first feedback from the third device. If the fourth information indicates that the first device needs to obtain partial feedback, such as the first feedback, the second device can send the first feedback to the first device, that is, forward the first feedback. If the fourth information indicates that the first device needs to obtain partial feedback, such as the second feedback, the second device can determine the second feedback based on the first feedback, such as the perception measurement result, and then send the second feedback to the second device. If the fourth information indicates that the first device needs to obtain all feedback, such as the first feedback and the second feedback, the second device can determine the second feedback based on the first feedback, and then send the first feedback and the second feedback to the second device, such as sending the first feedback and the second feedback in a package or separately.

[0444] The above describes in detail the overall process of the feedback indication method provided in the embodiment of the present application in combination with Figure 23. The following describes in detail the process of the feedback indication method shown in Figure 23 in the above scenarios A to C in combination with Figures 24 to 26.

[0445] For example, FIG24 is a flowchart diagram 5 of the feedback indication method in scenario A. As shown in FIG24 , taking the above-mentioned determination method 1, and the perception measurement phase and the perception reporting phase as an example, the steps of the feedback indication method may include:

[0446] S2401: The first device sends a perception request message to the second device, and the second device receives the perception request message from the first device.

[0447] Among them, the perception request message can also carry the above-mentioned fourth information, and the fourth information can be used to indicate that the first device needs to obtain the first feedback and the second feedback. For specific implementation, please refer to the relevant introduction in the above S2301-S2302, which will not be repeated here.

[0448] S2402: The second device sends an NDPA.

[0449] S2403: The second device sends an NDP.

[0450] S2404: The first device sends first feedback to the second device, and the second device receives the first feedback from the first device.

[0451] S2405: The second device sends second feedback to the first device, and the first device receives the second feedback from the second device.

[0452] Among them, the specific implementation of S2401-S2405 can refer to the relevant introduction in the above S901-S905, which will not be repeated here.

[0453] S2406: The second device sends first feedback to the first device, and the first device receives the first feedback from the second device.

[0454] As described in S2401 above, the second device can send the first feedback to the first device based on the fourth information, such as by bundling the first feedback and the second feedback. Furthermore, if the fourth information indicates that the first device needs to obtain the first feedback, the second device can directly forward the first feedback from the second device to the first device based on the fourth information without generating the second feedback.

[0455] For example, FIG25 is a flowchart diagram 5 of the feedback indication method in scenario B. As shown in FIG25 , taking the above-mentioned determination method 4, and the perception measurement phase and the perception reporting phase as an example, the steps of the feedback indication method may include:

[0456] S2501: The first device sends a perception request message to the second device, and the second device receives the perception request message from the first device.

[0457] Among them, the perception request message can also carry the above-mentioned fourth information, and the fourth information can be used to indicate that the first device needs to obtain the first feedback and the second feedback. For specific implementation, please refer to the relevant introduction in the above S2301-S2302, which will not be repeated here.

[0458] S2502: The second device sends an NDPA.

[0459] S2503: The second device sends an NDP.

[0460] S2504: The second device sends a feedback request message.

[0461] S2505: The third device sends first feedback to the second device, and the third device receives the first feedback from the second device.

[0462] S2506: The third device sends first feedback to the first device, and the third device receives the first feedback from the first device.

[0463] S2507: The second device sends second feedback to the first device, and the first device receives the second feedback from the second device.

[0464] Among them, the specific implementation of the above S2501-S2507 can refer to the relevant introduction in the above S1401-S1407, which will not be repeated here.

[0465] S2508: The second device sends first feedback to the first device, and the first device receives the first feedback from the second device.

[0466] As described in S2501 above, the second device can send the first feedback to the first device based on the fourth information, such as by bundling the first feedback and the second feedback. It should be noted that if the fourth information indicates that the first device needs to obtain the first feedback, the second device can directly forward the first feedback from the third device to the first device based on the fourth information without generating the second feedback. Furthermore, if the second device knows that the third device can communicate directly with the first device, the second device may not send the first feedback.

[0467] For example, FIG26 is a flowchart of the feedback indication method in scenario C. As shown in FIG26 , taking the above-mentioned determination method 7 and the perception measurement phase and the perception reporting phase as an example, the steps of the feedback indication method may include:

[0468] S2601: The first device sends a perception request message to the second device, and the second device receives the perception request message from the first device.

[0469] Among them, the perception request message can also carry the above-mentioned fourth information, and the fourth information can be used to indicate that the first device needs to obtain the first feedback, the second feedback and the third feedback. For specific implementation, please refer to the relevant introduction in the above S2301-S2302, which will not be repeated here.

[0470] S2602: The second device sends a perception request message to the third device, and the third device receives the perception request message from the second device.

[0471] S2603: The third device sends an NDPA.

[0472] S2604: The third device sends an NDP.

[0473] S2605: The third device sends a feedback request message.

[0474] S2606: The second device sends first feedback to the third device, and the third device receives the first feedback from the second device.

[0475] S2607: The third device sends second feedback to the second device, and the second device receives the second feedback from the third device.

[0476] Among them, the specific implementation of the above S2601-S2607 can refer to the relevant introduction in the above S1901-S1907, which will not be repeated here.

[0477] S2608: The third device sends first feedback to the second device, and the second device receives the first feedback from the third device.

[0478] As described in S2601 above, the third device can send the first feedback to the second device based on the fourth information, such as by bundling the first feedback and the second feedback. It should be noted that if the fourth information indicates that the first device only needs to obtain the first feedback, the third device can directly forward the first feedback from the second device to the second device based on the fourth information without generating the second feedback.

[0479] S2609: The second device sends third feedback to the first device, and the first device receives the third feedback from the second device.

[0480] Among them, the specific implementation of the above S2609 can refer to the relevant introduction in the above S1909, which will not be repeated here.

[0481] S2610: The second device sends first feedback and second feedback to the first device, and the first device receives the first feedback and second feedback from the second device.

[0482] As described in S2601 above, the second device can send the first feedback and the second feedback to the first device based on the fourth information, such as by sending the first feedback, the second feedback, and the third feedback in a package. It should be noted that if the fourth information indicates that the first device only needs to obtain the first feedback and / or the second feedback, the second device can directly forward the first feedback and / or the second feedback from the second device to the first device based on the fourth information without generating the second feedback.

[0483] Based on the methods shown in Figures 23-26, it can be seen that the first device can send the fourth information to the second device based on actual needs, such as business needs. In this way, the second device can send actually required feedback to the first device based on the fourth information, while not sending actually unnecessary feedback, thereby avoiding sending redundant information, thereby reducing communication overhead and improving communication efficiency.

[0484] It should be noted that, in the embodiments of the present application, the above-mentioned first embodiment and the above-mentioned second embodiment can be implemented independently or in combination, and there is no limitation on this.

[0485] Third embodiment:

[0486] For example, Figure 27 is a flowchart diagram of the third embodiment of the feedback indication method provided in the embodiment of the present application. The feedback indication method can be applied to two of the three devices shown in Figure 5, such as the first device, the second device, and the third device, and the communication between the first device and the second device. The first device can be a perception initiator, the second device can be a perception responder that is a perception transmitter, and the third device can be a perception responder that is a perception receiver.

[0487] As shown in FIG27 , the feedback indication method may include the following steps:

[0488] S2701: The first device generates fifth information.

[0489] Among them, the fifth information can be used to instruct the second device to determine all the configuration parameters of NDPA, or to indicate a part of the configuration parameters of NDPA, and another part of the configuration parameters of NDPA are determined by the second device. For example, all the configuration parameters of NDPA may include: the physical layer protocol data unit (PPDU) type of NDPA, LTF size, target user, feedback time limit, determination of the perception receiving end participating in the perception process, determination of the number of the perception process, or the number of the perception session, or determination of the frequency band information and resource information of the perception process. The feedback time limit is used to indicate that the first device, such as the perception initiator, will trigger feedback within a preset time period thereafter so that the second device is ready for feedback. In this way, some of the configuration parameters determined by the second device may include one or more of the following: determination of the perception receiving end participating in the perception process, determination of the number of the perception process, or the number of the perception session, or determination of the frequency band information and resource information of the perception process, etc.

[0490] Furthermore, the first device may determine the fifth information based on one or more of the following: the status of the first device, the status of the second device, the status of the third device, the business requirements of the first device, the business requirements of the second device, or the business requirements of the third device, without limitation.

[0491] S2702, the first device sends the fifth information, and the second device receives the fifth information.

[0492] Among them, the fifth information can be carried in one or more of the following: signaling in the perception establishment phase, such as a perception establishment request message, a perception establishment reception message, or signaling in the perception measurement phase, such as a perception request message, to achieve signaling multiplexing, thereby reducing communication overhead and improving communication efficiency.

[0493] S2703: The second device parses the fifth information.

[0494] The second device may determine all configuration parameters of the NDPA by parsing the fifth information.

[0495] Based on the method shown in Figure 27, it can be seen that since the configuration parameters of NDPA can be determined by the first device and the second device in cooperation, it is possible to flexibly determine the configuration parameters of NDPA according to business needs so that the configuration parameters of NDPA can meet business needs. For example, if the business of the first device requires the configuration parameters of NDPA, the configuration parameters of NDPA are determined by the first device. However, if the business of the second device requires the configuration parameters of NDPA, the first device instructs the second device to determine at least part of the configuration parameters of NDPA to meet the business needs of the second device.

[0496] It should be noted that, in the embodiments of the present application, the above-mentioned first embodiment, the above-mentioned second embodiment and the above-mentioned third embodiment can be implemented independently, or any two or three embodiments can be implemented in combination, and there is no limitation on this.

[0497] The above introduces the feedback indication method of the embodiment of the present application. The following introduces the feedback indication device of the embodiment of the present application. The feedback indication device of the embodiment of the present application includes a feedback indication device applied to the sending end and a feedback indication device applied to the receiving end, which are introduced below respectively.

[0498] In some embodiments, the feedback indication device applied to the transmitting end may be applicable to the communication system shown in FIG5 and have the functions of the first device in the feedback indication method shown in FIG6. The feedback indication device applied to the receiving end may be applicable to the communication system shown in FIG5 and have any functions of the second device in the feedback indication method shown in FIG6.

[0499] Exemplarily, Figure 28 is a structural diagram of a feedback indication device 2800 applied to a sending end. As shown in Figure 28, the feedback indication device 2800 includes units for performing the functions of the first device in the feedback indication method shown in Figure 6, such as a transceiver unit 2801 and a processing unit 2802.

[0500] The processing unit 2802 is configured to generate a first frame. The first frame includes first information, the first information being used to indicate a feedback type of the first feedback and / or a feedback type of the second feedback. The first feedback and the second feedback are feedback at different levels.

[0501] The transceiver unit 2801 is configured to send a first frame.

[0502] In one possible design scheme, the first frame may also include: mode indication information, which can be used to indicate that the first information indicates any one of the following: the feedback type of the first feedback, the feedback type of the second feedback, or the feedback type of the first feedback and the feedback type of the second feedback.

[0503] In one possible design scheme, the feedback type of the first feedback may include at least one of the following: uncompressed channel state information CSI, compressed CSI, empty data packet NDP, perception measurement result, feedback type determined by the perception initiator, feedback type determined by the perception responder, feedback type determined by the perception sending end, or feedback type determined by the perception receiving end, where the perception initiator is the first device.

[0504] In one possible design scheme, the feedback type of the second feedback may include at least one of the following: uncompressed CSI, compressed CSI, NDP, perception measurement results, feedback type determined by the perception initiator, feedback type determined by the perception responder, feedback type determined by the perception sending end, or feedback type determined by the perception receiving end, where the perception initiator is the first device.

[0505] In a possible design scheme, the first information may be carried in at least one of the following: signaling in the perception establishment phase, or a perception request message in the perception measurement phase.

[0506] In one possible design, the first feedback and the second feedback are feedback at different levels, which may mean that the first feedback is sent at a different timing than the second feedback, or the first feedback is sent to a different recipient than the second feedback.

[0507] In one possible design, the first information may include a first field and / or a second field, wherein the first field may be used to indicate a feedback type of the first feedback, and the second field may be used to indicate a feedback type of the second feedback.

[0508] Optionally, the feedback indication device 2800 may further include a storage unit (not shown in FIG. 28 ) storing a program or instruction. When the processing unit 2802 executes the program or instruction, the feedback indication device 2800 may perform the function of the first device in the feedback indication method shown in FIG. 6 .

[0509] It should be understood that the processing unit 2802 involved in the feedback indication device 2800 can be implemented by a processor or a processor-related circuit component; the transceiver unit 2801 can be implemented by a transceiver or a transceiver-related circuit component.

[0510] It should be noted that the feedback indication device 2800 can be a terminal device or a network device, or a chip (system) or other parts or components that can be set in the terminal device or network device, or a device that includes a terminal device or a network device. This application does not limit this.

[0511] In addition, the specific implementation of the feedback indication device 2800 can refer to the relevant introduction of the feedback indication method shown in Figure 6, and will not be repeated here.

[0512] Exemplarily, Figure 29 is a structural diagram of a feedback indication device 2900 applied to the receiving end. As shown in Figure 29, the feedback indication device 2900 includes a unit for performing the function of the second device in the feedback indication method shown in Figure 6, such as a transceiver unit 2901 and a processing unit 2902.

[0513] The transceiver unit 2901 is configured to receive a first frame. The first frame includes first information, the first information being used to indicate a feedback type of a first feedback and / or a feedback type of a second feedback. The first feedback and the second feedback are feedback at different levels.

[0514] The processing unit 2902 is configured to parse the first frame.

[0515] In one possible design, the first frame may further include mode indication information, where the mode indication information may be used to indicate whether the first information indicates any of the following: a feedback type of the first feedback, a feedback type of the second feedback, or a feedback type of the first feedback and a feedback type of the second feedback.

[0516] In one possible design scheme, the feedback type of the first feedback may include at least one of the following: uncompressed CSI, compressed CSI, NDP, perception measurement results, feedback type determined by the perception initiator, feedback type determined by the perception responder, feedback type determined by the perception sending end, or feedback type determined by the perception receiving end, and the perception initiator may be the first device.

[0517] In one possible design scheme, the feedback type of the second feedback may include at least one of the following: uncompressed CSI, compressed CSI, NDP, perception measurement results, feedback type determined by the perception initiator, feedback type determined by the perception responder, feedback type determined by the perception sending end, or feedback type determined by the perception receiving end, and the perception initiator may be the first device.

[0518] In one possible design, the first feedback and the second feedback are feedback at different levels, which may mean that the first feedback is sent at a different timing than the second feedback, or the first feedback is sent to a different recipient than the second feedback.

[0519] In one possible design, if the first information does not indicate the feedback type of the first feedback, or the first information indicates that the feedback type of the first feedback may include: the feedback type is determined by the perception transmitting end, and the perception transmitting end may be the second device. In this case, the processing unit 2902 is further configured to control the transceiver unit 2901 to send second information to the third device after parsing the first frame. The second information is used to indicate that the feedback type of the first feedback includes at least one of the following: uncompressed CSI, compressed CSI, NDP, perception measurement result, or the feedback type is determined by the perception receiving end, and the perception receiving end may be the third device.

[0520] Optionally, the second information may be carried in signaling during the perception measurement phase.

[0521] In one possible design, the first information may include a first field and a second field, wherein the first field may be used to indicate a feedback type of the first feedback, and the second field may be used to indicate a feedback type of the second feedback.

[0522] Optionally, the first field can be used to indicate that the feedback type of the first feedback includes at least one of the following: uncompressed CSI, compressed CSI, NDP, perception measurement results, or the feedback type is determined by the perception receiving end, and the perception receiving end can be a third device. The processing unit 2902 is also used to control the transceiver unit 2901 to send only the first field to the third device after parsing the first frame.

[0523] Optionally, the second field can be used to indicate the feedback type of the second feedback, including: the feedback type is determined by the perception receiving end, and the perception receiving end can be a third device, and the processing unit 2902 is also used to control the transceiver unit 2901 to send only the second field to the third device after parsing the first frame.

[0524] Furthermore, the transceiver unit 2901 is further configured to receive third information from the third device after sending only the second field to the third device. The third information may be used to indicate that the feedback type of the second feedback includes at least one of the following: uncompressed CSI, compressed CSI, NDP, or perception measurement result.

[0525] In one possible design scheme, the first information can be carried in at least one of the following: signaling in the perception establishment phase, or signaling in the perception measurement phase, to achieve signaling multiplexing, thereby reducing communication overhead and improving communication efficiency.

[0526] Optionally, the feedback indication device 2900 may further include a storage unit (not shown in FIG. 29 ) storing a program or instruction. When the processing unit 2902 executes the program or instruction, the feedback indication device 2900 may perform the function of the second device in the feedback indication method shown in FIG. 6 .

[0527] It should be understood that the processing unit 2902 involved in the feedback indication device 2900 can be implemented by a processor or a processor-related circuit component; the transceiver unit 2901 can be implemented by a transceiver or a transceiver-related circuit component.

[0528] It should be noted that the feedback indication device 2900 can be a terminal device or a network device, or a chip (system) or other parts or components that can be set in the terminal device or network device, or a device that includes a terminal device or a network device. This application does not limit this.

[0529] In addition, the specific implementation of the feedback indication device 2900 can refer to the relevant introduction of the feedback indication method shown in Figure 6, and will not be repeated here.

[0530] In other embodiments, the feedback indication device applied to the transmitting end may be applicable to the communication system shown in FIG5 and have the functions of the first device in the feedback indication method shown in FIG23. The feedback indication device applied to the receiving end may be applicable to the communication system shown in FIG5 and have any functions of the second device in the feedback indication method shown in FIG23.

[0531] Exemplarily, Figure 30 is a structural diagram of a feedback indication device 3000 applied to a sending end. As shown in Figure 30, the feedback indication device 3000 includes a unit for performing the function of the first device in the feedback indication method shown in Figure 23, such as a sending unit 3001 and a receiving unit 3002.

[0532] The sending unit 3001 is configured to send fourth information, wherein the fourth information is used to indicate that the first device needs to obtain first feedback and / or second feedback, and the first feedback and the second feedback are feedback at different levels.

[0533] The receiving unit 3002 is configured to receive the first feedback and / or the second feedback.

[0534] In one possible design, the first feedback and the second feedback are feedback at different levels, which may mean that the first feedback is sent at a different timing than the second feedback, or the first feedback is sent to a different recipient than the second feedback.

[0535] In one possible design scheme, the fourth information can be carried in at least one of the following items: signaling in the perception establishment phase and perception request message in the perception measurement phase, so as to achieve signaling multiplexing, thereby reducing communication overhead and improving communication efficiency.

[0536] Optionally, the sending unit 3001 and the receiving unit 3002 may also be integrated into one unit, such as a transceiver unit (not shown in FIG30 ). The transceiver unit is used to implement the sending function and the receiving function of the feedback indication device 3000 .

[0537] Optionally, the feedback indication device 3000 may further include a processing unit 3003 (shown as a dotted box in FIG30 ). The processing unit 3003 is configured to implement the processing function of the feedback indication device 3000 .

[0538] Optionally, the feedback indication device 3000 may further include a storage unit (not shown in FIG. 30 ) storing a program or instruction. When the processing unit 3003 executes the program or instruction, the feedback indication device 3000 may perform the function of the first device in the feedback indication method shown in FIG. 23 .

[0539] It should be understood that the processing unit 3001 involved in the feedback indication device 3000 can be implemented by a processor or a processor-related circuit component, which can be a processor or a processing unit; the transceiver unit can be implemented by a transceiver or a transceiver-related circuit component.

[0540] It should be noted that the feedback indication device 3000 can be a terminal device or a network device, or it can be a chip (system) or other parts or components set in the above-mentioned terminal device or network device, or a device including the terminal device or network device. The embodiment of the present application does not limit this.

[0541] In addition, the specific implementation of the feedback indication device 3000 can refer to the relevant introduction in the feedback indication method shown in Figure 23, which will not be repeated here.

[0542] Exemplarily, Figure 31 is a structural diagram of a feedback indication device 3100 applied to a receiving end. As shown in Figure 31, the feedback indication device 3100 includes a unit for performing the function of the second device in the feedback indication method shown in Figure 23, such as a transceiver unit 3101 and a processing unit 3102.

[0543] The transceiver unit 3101 is configured to receive fourth information, wherein the fourth information is used to indicate that the first device needs to obtain first feedback and / or second feedback, and the first feedback and the second feedback are feedback at different levels.

[0544] The processing unit 3102 is configured to control the transceiver unit 3102 to send the first feedback and / or the second feedback according to the fourth information.

[0545] In one possible design, the first feedback and the second feedback are feedback at different levels, which may mean that the first feedback is sent at a different timing than the second feedback, or the first feedback is sent to a different recipient than the second feedback.

[0546] In a possible design scheme, the fourth information can be carried in at least one of the following: signaling in the perception establishment phase, and a perception request message in the perception measurement phase.

[0547] Optionally, the feedback indication device 3100 may further include a storage unit (not shown in FIG. 31 ) storing a program or instruction. When the processing unit 3102 executes the program or instruction, the feedback indication device 3100 may perform the function of the second device in the feedback indication method shown in FIG. 23 .

[0548] It should be understood that the processing unit 3102 involved in the feedback indication device 3100 can be implemented by a processor or a processor-related circuit component, which can be a processor; the transceiver unit 3101 can be implemented by a transceiver or a transceiver-related circuit component.

[0549] It should be noted that the feedback indication device 3100 can be a terminal device or a network device, or a chip (system) or other parts or components that can be set in the terminal device or network device, or a device that includes a terminal device or a network device. This application does not limit this.

[0550] In addition, the specific implementation of the feedback indication device 3100 can refer to the relevant introduction in the feedback indication method shown in Figure 23, which will not be repeated here.

[0551] In still other embodiments, the feedback indication device applied to the transmitting end may be applicable to the communication system shown in FIG5 and have the functions of the first device in the feedback indication method shown in FIG27. The feedback indication device applied to the receiving end may be applicable to the communication system shown in FIG5 and have any functions of the second device in the feedback indication method shown in FIG27.

[0552] Exemplarily, Figure 32 is a structural diagram of a feedback indication device 3200 applied to a sending end. As shown in Figure 32, the feedback indication device 3200 includes units for performing the functions of the first device in the feedback indication method shown in Figure 27, such as a transceiver unit 3201 and a processing unit 3202.

[0553] The processing unit 3202 is configured to generate fifth information, wherein the fifth information is used to instruct the second device to determine all configuration parameters of the NDPA, or the fifth information is used to indicate a portion of the NDPA configuration parameters, and another portion of the NDPA configuration parameters is determined by the second device.

[0554] The transceiver unit 3201 is configured to send fifth information.

[0555] In one possible design scheme, the fifth information can be carried in one or more of the following: signaling in the perception establishment phase, or perception request message in the perception measurement phase, to achieve signaling multiplexing, thereby reducing communication overhead and improving communication efficiency.

[0556] Optionally, the feedback indication device 3200 may further include a storage unit (not shown in FIG. 32 ) storing a program or instruction. When the processing unit 3202 executes the program or instruction, the feedback indication device 3200 may perform the function of the first device in the feedback indication method shown in FIG. 27 .

[0557] It should be understood that the processing unit 3202 involved in the feedback indication device 3200 can be implemented by a processor or a processor-related circuit component; the transceiver unit 3201 can be implemented by a transceiver or a transceiver-related circuit component.

[0558] It should be noted that the feedback indication device 3200 can be a terminal device or a network device, or a chip (system) or other parts or components that can be set in the terminal device or network device, or a device that includes a terminal device or a network device. This application does not limit this.

[0559] In addition, the specific implementation of the feedback indication device 3200 can refer to the relevant introduction in the feedback indication method shown in Figure 27, which will not be repeated here.

[0560] Exemplarily, Figure 33 is a structural diagram of a feedback indication device 3300 applied to a receiving end. As shown in Figure 33, the feedback indication device 3300 includes a unit for executing the function of the second device in the feedback indication method shown in Figure 27, such as a transceiver unit 3301 and a processing unit 3302.

[0561] The transceiver unit 3301 is configured to receive fifth information, wherein the fifth information is used to instruct the second device to determine all configuration parameters of the NDPA, or the fifth information is used to indicate a portion of the NDPA configuration parameters, and another portion of the NDPA configuration parameters is determined by the second device.

[0562] The processing unit 3302 is configured to parse the fifth information.

[0563] In a possible design scheme, the fifth information may be carried in one or more of the following: signaling in the perception establishment phase, or a perception request message in the perception measurement phase.

[0564] Optionally, the feedback indication device 3300 may further include a storage unit (not shown in FIG. 33 ) storing a program or instruction. When the processing unit 3302 executes the program or instruction, the feedback indication device 3300 may perform the function of the second device in the feedback indication method shown in FIG. 27 .

[0565] It should be understood that the processing unit 3302 involved in the feedback indication device 3300 can be implemented by a processor or a processor-related circuit component; the transceiver unit 3301 can be implemented by a transceiver or a transceiver-related circuit component.

[0566] It should be noted that the feedback indication device 3300 can be a terminal device or a network device, or a chip (system) or other parts or components that can be set in the terminal device or network device, or a device that includes a terminal device or a network device. This application does not limit this.

[0567] In addition, the specific implementation of the feedback indication device 3300 can refer to the relevant introduction in the feedback indication method shown in Figure 27, which will not be repeated here.

[0568] The above describes the feedback indication device for a transmitter and the feedback indication device for a receiver according to the embodiments of the present application. The following describes possible product forms of the feedback indication device for a transmitter and the feedback indication device for a receiver. It should be understood that any product having the features of the feedback indication device for a transmitter as described in FIG. 28 , FIG. 30 , or FIG. 32 , and any product having the features of the feedback indication device for a receiver as described in FIG. 29 , FIG. 31 , or FIG. 33 , falls within the scope of protection of the present application. It should also be understood that the following description is for illustrative purposes only and does not limit the product forms of the feedback indication device for a transmitter and the feedback indication device for a receiver according to the embodiments of the present application to these.

[0569] As a possible product form, the feedback indication device applied to the transmitting end and the feedback indication device applied to the receiving end described in the embodiments of the present application can be implemented by a general bus architecture.

[0570] The feedback indication device applied to the transmitting end includes a processor and a transceiver internally connected to and communicating with the processor; the processor is configured to perform the processing functions of the first device in the feedback indication method shown in Figure 6, Figure 23, or Figure 27. The transceiver is configured to perform the transceiver functions of the first device in the feedback indication method shown in Figure 6, Figure 23, or Figure 27. Optionally, the feedback indication device applied to the transmitting end may also include a memory configured to store instructions executed by the processor.

[0571] The feedback indication device applied to the receiving end includes a processor and a transceiver internally connected to and communicating with the processor; the processor is configured to perform the processing functions of the second device in the feedback indication method shown in Figure 6, Figure 23, or Figure 27. The transceiver is configured to perform the transceiver functions of the second device in the feedback indication method shown in Figure 6, Figure 23, or Figure 27. Optionally, the feedback indication device applied to the receiving end may also include a memory configured to store instructions executed by the processor.

[0572] As a possible product form, the feedback indication device applied to the transmitting end and the feedback indication device applied to the receiving end described in the embodiments of the present application can be implemented by a general-purpose processor.

[0573] A general-purpose processor implementing the feedback indication device for a transmitting end includes a processing circuit and an output interface internally connected to and communicating with the processing circuit. The processing circuit is configured to control the output interface to perform transceiver functions. Optionally, the general-purpose processor may also include a storage medium configured to store instructions executed by the processing circuit.

[0574] The general-purpose processor implementing the feedback indication device applied to the receiving end includes a processing circuit, an input interface connected to the internal communication of the processing circuit, and the processing circuit is used to control the output interface to perform the transceiver function. Optionally, the general-purpose processor may also include a storage medium for storing instructions executed by the processing circuit.

[0575] As a possible product form, the feedback indication device applied to the transmitting end and the feedback indication device applied to the receiving end described in the embodiments of the present application can also be implemented using the following: one or more FPGAs (field programmable gate arrays), PLDs (programmable logic devices), controllers, state machines, gate logic, discrete hardware components, any other suitable circuits, or any combination of circuits capable of performing the various functions described throughout this application.

[0576] It should be understood that the feedback indication device applied to the transmitting end and the feedback indication device applied to the receiving end in the above-mentioned various product forms respectively have any functions of the transmitting end and the receiving end in the above-mentioned method embodiments, which will not be repeated here.

[0577] It should be understood that the term "and / or" in this document simply describes a relationship between related objects, indicating that three possible relationships exist. For example, "A and / or B" can represent: A exists alone, A and B exist simultaneously, or B exists alone. Furthermore, the character " / " in this document generally indicates that the related objects are in an "or" relationship.

[0578] Those skilled in the art will appreciate that the various method steps and units described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of the two. In order to clearly illustrate the interchangeability of hardware and software, the steps and components of each embodiment have been generally described in terms of function in the above description. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art may use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.

[0579] Those skilled in the art will clearly understand that, for the sake of convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0580] In the several embodiments provided in this application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are merely schematic. For example, the division of the units is merely a logical function division. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the mutual coupling or direct coupling or communication connection shown or discussed can be an indirect coupling or communication connection through some interfaces, devices or units, or can be electrical, mechanical or other forms of connection.

[0581] The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the embodiments of the present application.

[0582] In addition, the functional units in the various embodiments of the present application may be integrated into a single processing unit, or each unit may exist physically separately, or two or more units may be integrated into a single unit. The aforementioned integrated units may be implemented in the form of hardware or software functional units.

[0583] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application is essentially or the part that contributes to the prior art, or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including a number of instructions for enabling a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes: various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

[0584] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in the present application, and such modifications or substitutions should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. A feedback indication method, It is characterized in that include: The first device generates a first frame, wherein the first frame includes: first information, where the first information is used to indicate a feedback type of the first feedback and / or a feedback type of the second feedback, and the first feedback and the second feedback are feedbacks of different levels; The first device sends the first frame.

2. The method according to claim 1, It is characterized in that The first frame further includes: mode indication information, where the mode indication information is used to indicate that the first information indicates any one of the following: a feedback type of the first feedback, a feedback type of the second feedback, or a feedback type of the first feedback and a feedback type of the second feedback.

3. The method according to claim 1 or 2, It is characterized in that The feedback type of the first feedback includes at least one of the following: uncompressed channel state information CSI, compressed CSI, null data packet NDP, perception measurement result, feedback type determined by a perception initiator, feedback type determined by a perception responder, feedback type determined by a perception transmitter, or feedback type determined by a perception receiver, and the perception initiator is the first device.

4. The method according to claim 1 or 2, It is characterized in that The feedback type of the second feedback includes at least one of the following: uncompressed CSI, compressed CSI, NDP, perception measurement results, feedback type determined by a perception initiator, feedback type determined by a perception responder, feedback type determined by a perception sender, or feedback type determined by a perception receiver, and the perception initiator is the first device.

5. The method according to any one of claims 1 to 4, It is characterized in that The first information is carried in at least one of the following: signaling in a perception establishment phase, or a perception request message in a perception measurement phase.

6. The method according to any one of claims 1 to 5, It is characterized in that The first feedback and the second feedback are feedbacks of different levels, which means that a sending timing of the first feedback is different from a sending timing of the second feedback, or a sending object of the first feedback is different from a sending object of the second feedback.

7. The method according to any one of claims 1 to 6, It is characterized in that The first information includes: a first field and a second field, the first field is used to indicate a feedback type of the first feedback, and the second field is used to indicate a feedback type of the second feedback.

8. A feedback indication method, It is characterized in that include: The second device receives a first frame, wherein the first frame includes: first information, where the first information is used to indicate a feedback type of the first feedback and / or a feedback type of the second feedback, and the first feedback and the second feedback are feedbacks of different levels; The second device parses the first frame.

9. The method according to claim 8, It is characterized in that The first frame further includes: mode indication information, where the mode indication information is used to indicate that the first information indicates any one of the following: a feedback type of the first feedback, a feedback type of the second feedback, or a feedback type of the first feedback and a feedback type of the second feedback.

10. The method according to claim 8 or 9, It is characterized in that The feedback type of the first feedback includes at least one of the following: uncompressed CSI, compressed CSI, NDP, perception measurement results, feedback type determined by a perception initiator, feedback type determined by a perception responder, feedback type determined by a perception sender, or feedback type determined by a perception receiver, and the perception sender is the second device.

11. The method according to claim 8 or 9, It is characterized in that The feedback type of the second feedback includes at least one of the following: uncompressed CSI, compressed CSI, NDP, perception measurement results, feedback type determined by a perception initiator, feedback type determined by a perception responder, feedback type determined by a perception sender, or feedback type determined by a perception receiver, and the perception sender is the second device.

12. The method according to any one of claims 8 to 11, It is characterized in that The first feedback and the second feedback are feedbacks of different levels, which means that a sending timing of the first feedback is different from a sending timing of the second feedback, or a sending object of the first feedback is different from a sending object of the second feedback.

13. The method according to claim 8, It is characterized in that The first information does not indicate a feedback type of the first feedback, or the first information indicates that the feedback type of the first feedback includes: determining the feedback type by a perception sending end, and the perception sending end is the second device. After the second device parses the first frame, the method further includes: The second device sends second information to the third device, wherein the second information is used to indicate that the feedback type of the first feedback includes at least one of the following: uncompressed CSI, compressed CSI, NDP, perceptual measurement results, or the feedback type is determined by a perceptual receiving end, and the perceptual receiving end is the third device.

14. The feedback indication method according to claim 13, It is characterized in that The second information is carried in at least one of the following: signaling in a perception measurement phase, or signaling in a perception reporting phase.

15. The method according to claim 8, It is characterized in that The first information includes: a first field and / or a second field, the first field is used to indicate a feedback type of the first feedback, and the second field is used to indicate a feedback type of the second feedback.

16. The method according to claim 15, It is characterized in that The first field is used to indicate that the feedback type of the first feedback includes at least one of the following: uncompressed CSI, compressed CSI, NDP, a perception measurement result, or a feedback type determined by a perception receiving end, the perception receiving end is a third device, and after the second device parses the first frame, the method further includes: The second device sends only the first field to the third device.

17. The method according to claim 15, It is characterized in that The second field is used to indicate the feedback type of the second feedback, including: the feedback type is determined by the perception receiving end, the perception receiving end is a third device, and after the second device parses the first frame, the method further includes: The second device sends only the second field to the third device.

18. The method according to claim 17, It is characterized in that After sending the second field to the third device, the method further includes: The second device receives third information from the third device, wherein the third information is used to indicate that a feedback type of the second feedback includes at least one of the following: uncompressed CSI, compressed CSI, NDP, or perceptual measurement result.

19. The feedback indication method according to any one of claims 8 to 18, It is characterized in that The first information is carried in at least one of the following: signaling in a perception establishment phase, or signaling in a perception measurement phase.

20. A feedback indication method, It is characterized in that include: The first device sends fourth information, where the fourth information is used to indicate that the first device needs to obtain first feedback and / or second feedback, and the first feedback and the second feedback are feedback at different levels; The first device receives the first feedback and / or the second feedback.

21. The method according to claim 20, It is characterized in that The first feedback and the second feedback are feedbacks of different levels, which means that a sending timing of the first feedback is different from a sending timing of the second feedback, or a sending object of the first feedback is different from a sending object of the second feedback.

22. The method according to claim 20 or 21, It is characterized in that The fourth information is carried in at least one of the following items: signaling in the perception establishment phase, and a perception request message in the perception measurement phase.

23. A feedback indication method, It is characterized in that include: The second device receives fourth information, where the fourth information is used to indicate that the first device needs to obtain first feedback and / or second feedback, and the first feedback and the second feedback are feedback at different levels; The second device sends the first feedback and / or the second feedback according to the fourth information.

24. The feedback indication method according to claim 23, It is characterized in that The first feedback and the second feedback are feedbacks of different levels, which means that a sending timing of the first feedback is different from a sending timing of the second feedback, or a sending object of the first feedback is different from a sending object of the second feedback.

25. The feedback indication method according to claim 23 or 24, It is characterized in that The fourth information is carried in at least one of the following items: signaling in the perception establishment phase, and a perception request message in the perception measurement phase.

26. A feedback indication method, It is characterized in that include: The first device generates fifth information, wherein the fifth information is used to instruct the second device to determine all configuration parameters of the NDPA, or the fifth information is used to indicate a part of the configuration parameters of the NDPA, and another part of the configuration parameters of the NDPA is determined by the second device; The first device sends the fifth information.

27. The method according to claim 26, It is characterized in that The fifth information is carried in one or more of the following: signaling in a perception establishment phase, or a perception request message in a perception measurement phase.

28. A feedback indication method, It is characterized in that include: The second device receives fifth information, wherein the fifth information is used to instruct the second device to determine all configuration parameters of the NDPA, or the fifth information is used to indicate a part of the configuration parameters of the NDPA, and another part of the configuration parameters of the NDPA is determined by the second device; The second device parses the fifth information.

29. The method according to claim 28, It is characterized in that The fifth information is carried in one or more of the following: signaling in a perception establishment phase, or a perception request message in a perception measurement phase.

30. A feedback indicating device, It is characterized in that Comprising means for performing the method of any one of claims 1-7, 20-22, 26 or 27.

31. A feedback indicating device, It is characterized in that Comprising means for performing the method of any one of claims 8-19, 23-25, 28 or 29.

32. A computer-readable storage medium, It is characterized in that Used to store a computer program, the computer program comprising instructions for executing the method according to any one of claims 1 to 29.

33. A computer program, It is characterized in that The computer program comprises instructions for executing the method according to any one of claims 1-29.

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