Information feedback method and device

Abstract

The invention relates to the technical field of communication, in particular to an information feedback method and device. According to the application, an IEEE (Institute of Electrical and Electronic Engineers) protocol, such as an IEEE 802.11 be / Wi-Fi 7 / EHT protocol, an IEEE 802.11 bn / UHR / Wi-Fi 8 protocol, an IEEE 802.15 / UWB protocol, an IEEE 802.11 bf / perception protocol, an integrated millimeter wave IMMW protocol or a star flash protocol and the like can be supported. In the method, after a first station receives a first signal, a second signal is sent according to a feedback type, and the second signal can comprise channel information determined according to the first signal and first reference information or comprise information determined according to the first signal but not according to the first reference information. After the second station receives the second signal, channel information between the first station and the third station can be determined according to the second signal. Therefore, the overall efficiency of perception and communication is improved.

Description

Technical Field

[0001] This application relates to the field of communication technology, and in particular to an information feedback method and apparatus. Background Technology

[0002] Wireless sensing technology refers to inferring and perceiving the surrounding environment by analyzing wireless signals "modulated" by various obstacles, such as channel status information (CSI). The sensing process in wireless sensing technology includes the capability interaction phase, the sensing and measurement session establishment phase, the sensing and measurement interaction phase, and the sensing and measurement termination phase.

[0003] During the sensing and measurement interaction phase, the sensing transmitter can send a null data packet (NDP) to the sensing receiver. This NDP does not carry any data. The sensing receiver receives the NDP and measures the CSI based on the received NDP.

[0004] However, the above approach affects the overall efficiency of communication and sensing. Summary of the Invention

[0005] This application provides an information feedback method and apparatus that can improve the overall efficiency of communication and sensing.

[0006] In a first aspect, embodiments of this application provide an information feedback method, which can be applied to a first site, the first site including a fifth-generation (5G) th 5G (generation, 5G) communication equipment or sixth-generation (6G) th The method includes: 6G (generation, 6G) communication equipment or wireless local area network (WLAN) equipment (including Wi-Fi devices or equipment involved in the Starlight Alliance, etc.), or chips, functional modules, processing systems, or communication components that can be set in WLAN equipment.

[0007] The first station receives a first signal, which is the signal transmitted by the third station after passing through the channel. The first station sends a second signal to the second station according to the feedback type. The second signal is used by the second station to determine the channel information between the first station and the third station. Wherein, when the feedback type is a first feedback type, the second signal includes first information, which is the channel information determined based on the first signal and the first reference information. Alternatively, when the feedback type is a second feedback type, the second signal includes second information, which is the information determined based on the first signal, and the second information is different from the first information.

[0008] As an example, the third station can be the same as the second station. That is, the second station can determine the channel information between itself and the first station based on the second signal. As another example, the third station is different from both the first and second stations. That is, the second station can determine the channel information between the first and third stations based on the second signal.

[0009] The feedback type refers to the type of second signal fed back by the first station based on the first signal. The first signal and the second signal are named to distinguish different information; similarly, the first information and the second information are also named to distinguish different information. The names of each information or signal are merely examples and are not intended to limit the embodiments of this application. For example, the first information and the second information can also be called different signals. Furthermore, the first signal and the second signal can also be called different information, etc.

[0010] The aforementioned first reference information can be used for channel estimation. Of course, this first reference information can be used for more than just channel estimation; it can also be used for other functions, and the embodiments of this application are not limited thereto.

[0011] The first signal can be a signal transmitted through a channel after being sent by a third station. For example, if the first signal is reference information transmitted through a channel (e.g., the first signal is second reference information), this first signal can be used for sensing. The second reference information can be information transmitted through a channel after the first reference information. Alternatively, if the first signal is non-reference information transmitted through a channel (i.e., the first signal is non-reference information), this first signal can be used for both sensing and communication.

[0012] In this embodiment, regardless of whether the first signal is a signal transmitted through the channel after reference information is received, the first station can feed back a second signal based on the first signal, thereby allowing the second station to determine the channel information between the first and third stations based on the second signal. This improves the overall efficiency of sensing and communication.

[0013] When the first signal is a signal obtained after non-reference information has been transmitted through the channel, not only can normal communication between the first and third stations be guaranteed, but the second station can also obtain the aforementioned channel information. Therefore, the first station can feed back the second signal according to different feedback types, adapting to different application scenarios and further improving the overall efficiency of sensing and communication.

[0014] In one possible implementation, the second information, which is information determined based on the first signal, includes: the second information being determined based on the first signal and information not determined based on the first reference information.

[0015] The first piece of information can be channel status information (CSI), channel frequency response (CFR), or channel impulse response (CIR), etc. The second piece of information can be a composite of the transmitted signal without channel estimation and CSI, or in other words, the second piece of information can be the first signal without channel estimation processing.

[0016] In this embodiment of the application, different feedback types can correspond to different processing methods, so that the first station can feed back different second signals to match different application scenarios and improve the overall efficiency of perception and communication.

[0017] In one possible implementation, the feedback type is determined through negotiation between the first and second sites, or the feedback type is defined by a standard, or the feedback type is determined by the first site.

[0018] In this embodiment, the feedback type can be determined through negotiation between stations, such as by exchanging information. Alternatively, the feedback type can be determined by the first station itself, such as by the first station determining the feedback type and then feeding it back in the second signal. Or, the feedback type can be defined by a standard.

[0019] In one possible implementation, the method further includes: a first station receiving first indication information, the first indication information being used to indicate a feedback type.

[0020] The first station can clearly know the type of feedback through this first instruction information.

[0021] In one possible implementation, the method further includes: a first station sending first indication information, the first indication information being used to indicate the feedback type.

[0022] For example, the first station can send the first instruction information to the second station. Or, the first station can suggest a feedback type to the second station, so the second station can send information to the first station including information indicating the feedback type.

[0023] In one possible implementation, the first indication information is included in a radio frame, or in control information, or in higher-layer signaling.

[0024] For example, control information may include downlink control information (DCI) or link control information sent by the grant (G) node.

[0025] In one possible implementation, the wireless frame is either a sensing measurement request frame or a sensing measurement response frame.

[0026] In one possible implementation, the second signal also includes information indicating the type of feedback.

[0027] In one possible implementation, the feedback type is determined by the resource transmitting the first signal.

[0028] In this embodiment, the feedback type is determined by the resources used to transmit the first signal, or it can be expressed as the feedback type corresponding to the resources used to transmit the first signal. This method of determining the feedback type can be defined by a standard, or determined through negotiation between the first station and the second station, etc., and this embodiment does not limit this approach.

[0029] In one possible implementation, if the resources for transmitting the first signal are included in the resources for transmitting control information, then the feedback type is the second feedback type.

[0030] In other words, the third station can transmit a first signal within resources used for transmitting control information. This first signal can be used to carry either control information or non-control information. Transmitting non-control information within resources designated for control information transmission is possible because those resources may not currently have any control information to transmit; thus, reusing resources not used for control information transmission improves resource utilization. Simultaneously, the first station can also utilize either control or non-control information for sensing, further enhancing the overall efficiency of communication and sensing.

[0031] In one possible implementation, if the resources for transmitting the first signal are included in the resources for transmitting the broadcast signal, then the feedback type is either the first feedback type or the second feedback type.

[0032] The third station can transmit a first signal within resources designated for broadcasting signals. This first signal can be used to carry either broadcast or non-broadcast signals. Transmitting non-broadcast signals within resources designated for broadcasting signals is possible because there may be no broadcast signals to transmit in those resources temporarily; thus, reusing resources not used for broadcasting signals improves resource utilization. Simultaneously, the first station can also utilize either broadcast or non-broadcast signals for sensing, further enhancing the overall efficiency of communication and sensing.

[0033] In this embodiment of the application, the broadcast signal may include, but is not limited to, synchronization information, master information block (MIB), and system information block (SIB).

[0034] In one possible implementation, if the resource transmitting the first signal is the second resource among the first resources, then the feedback type is the second feedback type; or, if the resource transmitting the first signal is another resource among the first resources besides the second resource, then the feedback type is the first feedback type.

[0035] In this embodiment, the first station can determine the feedback type based on the different resources used to transmit the first signal. For example, the first resource can be a resource for sensing, and the second resource is a resource within the first resource used for communication and sensing (such as transmitting non-reference information). For instance, non-reference information can be transmitted on the second resource used for sensing. This non-reference information can be used for communication between the sender and receiver, and also for determining channel information, thereby improving the overall efficiency of communication and sensing.

[0036] In one possible implementation, the method further includes: a first station receiving second indication information, the second indication information being used to indicate resources for transmitting the first signal.

[0037] In one possible implementation, the method further includes: a first station receiving third indication information, the third indication information being used to indicate whether the first signal is second reference information or non-reference information.

[0038] The second reference information can be the information obtained after the first reference information has been transmitted through the channel. The third indication information can be sent by the second station.

[0039] In this embodiment of the application, the third indication information can indicate the type of the first signal, which can be reference information or non-reference information, thereby enabling the first station to determine the feedback type in combination with the type of the first signal.

[0040] In one possible implementation, if the first signal is second reference information, the feedback type is either the first feedback type or the second feedback type; or, if the first signal is non-reference information, the feedback type is the second feedback type.

[0041] In this embodiment, if the first signal is non-reference information, the feedback type can be the second feedback type. This allows the second station to obtain channel information between the first and third stations even if the first station does not perform channel estimation. Consequently, sensing is achieved without affecting communication, improving the overall efficiency of communication and sensing.

[0042] Secondly, embodiments of this application provide an information feedback method, which can be applied to a second site. The second site may include 5G communication equipment, 6G communication equipment, or WLAN equipment (including Wi-Fi equipment or equipment involved in the StarFlash Alliance, etc.), or may be a chip, functional module, processing system, or communication component disposed in the WLAN equipment. The method includes:

[0043] The second station receives a second signal, which is used by the second station to determine channel information between the first station and the third station; the second station determines the channel information between the first station and the third station based on the second signal; wherein, when the feedback type is a first feedback type, the second signal includes first information, which is channel information determined based on the first signal and first reference information; or, when the feedback type is a second feedback type, the second signal includes second information, which is information determined based on the first signal, and the second information is different from the first information.

[0044] The second station determines the channel information between the first and third stations based on the second signal, including: the second station determining the channel information between the first and third stations based on the feedback type. That is, the second station can parse the second signal according to the feedback type and obtain the aforementioned channel information from the second signal. This channel information may include, but is not limited to, CSI, CFR, or CIR.

[0045] The second station determines the channel information between the first station and the third station based on the second signal, including: the second station determines the feedback type based on the second signal, and determines the channel information between the first station and the third station based on the feedback type.

[0046] Further explanations regarding the second aspect can be found in the first aspect, and will not be elaborated upon here.

[0047] In one possible implementation, the second information, which is information determined based on the first signal, includes: the second information being determined based on the first signal and information not determined based on the first reference information.

[0048] In one possible implementation, the feedback type is determined through negotiation between the first and second sites, or the feedback type is defined by a standard, or the feedback type is determined by the first site.

[0049] In one possible implementation, the method further includes: a second station sending first indication information, which is used to indicate the feedback type.

[0050] In one possible implementation, the method further includes: a second station receiving first indication information, the first indication information being used to indicate a feedback type.

[0051] In one possible implementation, the first indication information is contained in a radio frame, or in control information, or in higher-layer signaling.

[0052] In one possible implementation, the wireless frame is either a sensing measurement request frame or a sensing measurement response frame.

[0053] In one possible implementation, the second signal also includes information indicating the type of feedback.

[0054] In one possible implementation, the feedback type is determined by the resource transmitting the first signal.

[0055] In one possible implementation, if the resources for transmitting the first signal are included in the resources for transmitting control information, then the feedback type is the second feedback type.

[0056] In one possible implementation, the first signal is used to carry control information, or the first signal is used to carry non-control information.

[0057] In one possible implementation, the resources for transmitting the first signal are included in the resources for transmitting the broadcast signal, and the feedback type is either a first feedback type or a second feedback type.

[0058] In one possible implementation, the first signal is used to carry a broadcast signal; or, the first signal is used to carry a non-broadcast signal.

[0059] In one possible implementation, if the resource transmitting the first signal is the second resource among the first resources, then the feedback type is the second feedback type; or, if the resource transmitting the first signal is another resource among the first resources besides the second resource, then the feedback type is the first feedback type.

[0060] In one possible implementation, the first resource is a resource for sensing, and the second resource is a resource within the first resource used for communication and sensing.

[0061] In one possible implementation, the method further includes: a first station sending second indication information, the second indication information being used to indicate resources for transmitting the first signal.

[0062] In one possible implementation, the method further includes: a second station sending third indication information, the third indication information also being used to indicate whether the first signal is second reference information or non-reference information.

[0063] In one possible implementation, if the first signal is second reference information, the feedback type is either the first feedback type or the second feedback type; or, if the first signal is non-reference information, the feedback type is the second feedback type.

[0064] Thirdly, embodiments of this application provide a communication device for executing the methods described in the first aspect, the second aspect, or any possible implementation thereof. The communication device includes a module having the function of executing the methods in any one of the first or second aspects or any possible implementation thereof.

[0065] Fourthly, embodiments of this application provide a communication device, which includes a processor and a transceiver. The processor is used to execute the processing steps in the method described in the first aspect, the second aspect, or any possible implementation thereof, and the transceiver is used to execute the sending and receiving steps in the method described in the first aspect, the second aspect, or any possible implementation thereof.

[0066] Fifthly, embodiments of this application provide a chip, the communication device including logic circuitry and an interface, the logic circuitry and the interface being coupled; the interface being used for inputting and / or outputting information, and the logic circuitry being used for performing processing steps in the method as described in the first aspect, the second aspect, or any possible implementation.

[0067] Sixthly, embodiments of this application provide a computer-readable storage medium for storing a computer program that, when run on a computer, causes the methods described in the first aspect, the second aspect, or any possible implementation thereof to be executed.

[0068] In a seventh aspect, embodiments of this application provide a computer program product that, when run on a computer, causes the methods described in the first aspect, the second aspect, or any possible implementation thereof to be executed.

[0069] Eighthly, embodiments of this application provide a communication system including a first station and a second station. The first station is used to execute the method described in the first aspect or any possible implementation thereof, and the second station is used to execute the method described in the second aspect or any possible implementation thereof. Attached Figure Description

[0070] Figure 1a This is a schematic diagram of the architecture of a communication system provided in an embodiment of this application;

[0071] Figure 1b This is a schematic diagram of another architecture of the communication system provided in the embodiments of this application;

[0072] Figure 2 This is a flowchart illustrating the information feedback method provided in an embodiment of this application;

[0073] Figure 3 This is a schematic diagram of the signal processing provided in an embodiment of this application;

[0074] Figure 4a This is a schematic diagram of an interaction flow for a feedback type provided in an embodiment of this application;

[0075] Figure 4b This is a schematic diagram of another interaction flow for the feedback type provided in the embodiments of this application;

[0076] Figure 5a This is a schematic diagram of the format of the perception measurement request frame provided in an embodiment of this application;

[0077] Figure 5b This is a schematic diagram of the format of the sensing measurement response frame provided in an embodiment of this application;

[0078] Figure 6 This is a schematic diagram of a communication device provided in an embodiment of this application;

[0079] Figure 7 This is another schematic diagram of the communication device provided in the embodiments of this application;

[0080] Figure 8 This is another structural schematic diagram of the communication device provided in the embodiments of this application. Detailed Implementation

[0081] To facilitate understanding of the technical solution of this application, the application will be further described below with reference to the accompanying drawings.

[0082] The terms "first" and "second," etc., used in the specification, claims, and drawings of this application are used only to distinguish different objects and not to describe a specific order. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products, or apparatuses.

[0083] The term "embodiment" as used herein means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0084] In this application, "at least one (item)" refers to one or more, "more than one" refers to two or more, "at least two (items)" refers to two or three or more, and "and / or" is used to describe the relationship between related objects, indicating that there can be three relationships. For example, "A and / or B" can mean: only A exists, only B exists, and both A and B exist simultaneously, where A and B can be singular or plural. "Or" indicates that there can be two relationships, such as only A exists and only B exists; when A and B are not mutually exclusive, it can also mean that there are three relationships, such as only A exists, only B exists, and both A and B exist simultaneously. The character " / " generally indicates that the preceding and following related objects are in an "or" relationship. "At least one (item) of the following" or similar expressions refer to any combination of these items. For example, at least one (item) of a, b, or c can mean: a, b, c, "a and b", "a and c", "b and c", or "a and b and c".

[0085] In this application, "instruction" can include direct instruction, indirect instruction, explicit instruction, and implicit instruction. When describing a certain instruction information for the purpose of instructing A, it can be understood that the instruction information carries A, directly instructs A, or indirectly instructs A.

[0086] In this application, the information indicated by the instruction information is called the information to be instructed. In specific implementations, there are many ways to indicate the information to be instructed, such as, but not limited to, directly indicating the information to be instructed, such as the information to be instructed itself or its index. It can also indirectly indicate the information to be instructed by indicating other information, where there is a relationship between the other information and the information to be instructed. It can also indicate only a part of the information to be instructed, while the other parts are known or pre-agreed upon. For example, the instruction of specific information can be achieved by using a pre-agreed (e.g., protocol-defined) arrangement of various pieces of information, thereby reducing instruction overhead to some extent. Furthermore, the information to be instructed can be sent as a whole or divided into multiple sub-information pieces, and the sending period and / or timing of these sub-information pieces can be the same or different.

[0087] In this application, "send" and "receive" indicate the direction of signal transmission. For example, "send information to XX" can be understood as the destination of the information being XX, which can include direct transmission via the air interface or indirect transmission via the air interface from other units or modules. "Receive information from YY" can be understood as the source of the information being YY, which can include direct reception from YY via the air interface or indirect reception from YY via the air interface from other units or modules. "Send" can also be understood as the "output" of a chip interface, and "receive" can also be understood as the "input" of a chip interface. In other words, sending and receiving can occur between devices, such as between network devices and terminal devices, or within a device, such as between components, modules, chips, software modules, or hardware modules within the device via buses, traces, or interfaces.

[0088] This application provides an information feedback method and apparatus, which improves the overall efficiency of communication and sensing.

[0089] The system involved in this application is described below.

[0090] The technical solutions provided in this application can be applied to wireless local area network (WLAN) systems, such as SparkLink (or NearLink) or Wi-Fi. For example, the technical solutions provided in this application can also be applied to SparkLink (or NearLink) standard protocols, such as SparkLink Low Energy (SLE) wireless communication systems. Furthermore, the technical solutions provided in this application can be applied to the Institute of Electrical and Electronics Engineers (IEEE) 802.11 series protocols (or standards), such as the 802.11be protocol, the 802.11bn protocol (or Wi-Fi 8, also known as Ultra High Reliability (UHR) or Ultra High Reliability and Throughput (UHRT)), or next-generation protocols of the 802.11bn protocol, or protocols supporting ambient power (AMP), etc., and will not be listed exhaustively. The technical solutions provided in this application can also be applied to wireless personal area networks (WPANs) based on millimeter wave (MMW) technologies, such as integrated millimeter wave (IMMW) and ultra-wideband (UWB) technologies. For example, the technical solutions provided in this application can be applied to IEEE 802.15 series protocols, such as 802.15.4a, 802.15.4z, or 802.15.4ab, or a future generation of UWB WPAN protocols, etc., and will not be listed exhaustively. The technical solutions provided in this application can also be applied to the following communication systems, such as Internet of Things (IoT) systems, vehicle-to-everything (V2X, where X can represent anything), device-to-device (D2D), narrowband Internet of Things (NB-IoT) systems, long term evolution (LTE) systems, 5th generation (5G) communication systems, and other new communication systems that will emerge in the future development of communication.For example, V2X can include vehicle-to-vehicle (V2V), vehicle-to-infrastructure (V2I), vehicle-to-pedestrian (V2P), or vehicle-to-network (V2N) communication.

[0091] The method provided in this application embodiment can be implemented by a communication device in a communication system.

[0092] As one possible implementation, the communication device can be an access point (AP) or a station (STA).

[0093] An Access Point (AP) is a device with wireless communication capabilities that supports communication, sensing, or power transmission using WLAN protocols. It has the function of communicating or sensing with other devices in a WLAN network (such as non-access point stations (non-APSTAs) or other access points), and can also communicate, sense, or transmit power with other devices. Alternatively, an access point acts as a bridge connecting wired and wireless networks, primarily connecting various wireless network clients together and then connecting the wireless network to an Ethernet network. In a WLAN system, an access point can be called an Access Point Station (AP STA). This wireless communication device can be a complete device or a chip, processing system, or functional module installed within a complete device. Devices with these chips, processing systems, or functional modules can implement the methods and functions of the embodiments in this application under the control of the chips, processing systems, or functional modules. The AP in the embodiments of this application is a device that provides services to non-AP STAs and can support 802.11 series protocols or subsequent protocols. For example, an access point can be an access point for a terminal (such as a mobile phone) to enter a wired (or wireless) network, mainly deployed in homes, buildings, and parks, with a typical coverage radius of tens to hundreds of meters. Of course, it can also be deployed outdoors. Another example is that an AP can be a communication entity such as a communication server, router, switch, or bridge; APs can include various forms of macro base stations, micro base stations, and repeater stations. Of course, an AP can also be a chip, processing system, or module within the above-mentioned devices, thereby implementing the methods and functions of the embodiments of this application.

[0094] A Station-Style (STA) is a device with wireless communication capabilities that supports communication, sensing, or power transmission using the WLAN protocol. It has the ability to communicate, sense, or transmit power with other non-AP STAs or access points in a WLAN network. In a WLAN system, a station can be called a non-access point station (non-AP STA). For example, an STA is any user communication device that allows a user to communicate with an AP (Access Point) or sense or transmit power, and thus communicate with the WLAN. This wireless communication device can be a complete device, or it can be a chip, processing system, or functional module installed in a complete device. Devices with these chips, processing systems, or functional modules can implement the methods and functions of the embodiments of this application under the control of the chips, processing systems, or functional modules. For example, an STA can be a wireless communication chip, a wireless sensor, or a wireless communication terminal, and can also be referred to as a user. Furthermore, an STA can be a mobile phone supporting Wi-Fi communication, a tablet computer supporting Wi-Fi communication, a set-top box supporting Wi-Fi communication, a smart TV supporting Wi-Fi communication, a smart wearable device supporting Wi-Fi communication, an in-vehicle communication device supporting Wi-Fi communication, and a computer supporting Wi-Fi communication. Of course, STA can also be a chip, processing system, or module in the various types of devices described above, thereby implementing the methods and functions of the embodiments of this application.

[0095] Figure 1a This is a schematic diagram of the architecture of a communication system provided in an embodiment of this application. For example... Figure 1a As shown, the embodiments of this application can be applied to scenarios such as communication or sensing between AP and non-AP STA, between APs, or between non-AP STAs in WLAN, and the embodiments of this application are not limited thereto. For example, an AP can communicate or sense with a single non-AP STA, or an AP can communicate or sense with multiple non-AP STAs simultaneously. For example, communication or sensing between an AP and multiple non-AP STAs can be further divided into downlink transmission (AP simultaneously sending signals to multiple non-AP STAs) and uplink transmission (multiple non-AP STAs sending signals to the AP). Figure 1a The example of a non-AP STA (phone) and an AP (router) is provided and is not intended to limit the types of APs and non-AP STAs in this application. Furthermore, Figure 1a The number of APs and non-AP STAs shown are merely examples. In a specific implementation, the number of APs or non-AP STAs may be more or less, and this application embodiment does not limit this.

[0096] As another possible implementation, the communication device can be a grant (G) station or a terminal (T) station.

[0097] The G site can possess communication and management capabilities. Management capabilities include communication management, such as connection management, resource scheduling, or information security management. For example, the G site can send resource management information or data scheduling information, such as access layer resource management information. The T site can possess communication capabilities and can transmit services with the G site. For instance, the T site is a site that receives resource management information (such as access layer resource management information) or data scheduling information and sends data based on that information. For example, the T site may include barcodes, radio frequency identification (RFID), sensors, global positioning system (GPS), lidar, battery cells, etc.

[0098] The roles of G and T stations are relative. For example, in one network topology, station A can be a G station, but in another network topology, station A might be a T station. In other words, when a station belongs to two or more network topologies simultaneously, this station can be a T station in some network topologies and a G station in others.

[0099] Figure 1b This is a schematic diagram of another architecture of the communication system provided in this application embodiment. The communication system may include one or more G sites and one or more T sites. Figure 1b An example is shown with one G site and two T sites. T sites can connect to G sites, and T sites can also connect to each other.

[0100] Figure 1a and Figure 1b The communication system shown is merely an example and is not intended to limit the embodiments of this application.

[0101] The following describes the methods involved in the embodiments of this application.

[0102] The first signal and the second signal shown below are named to distinguish different information. Similarly, the first information and the second information are also named to distinguish different information. The names of each information or signal are merely examples and are not intended to limit the embodiments of this application. For example, the first information and the second information can also be called different signals. Furthermore, the first signal and the second signal can also be called different information, etc.

[0103] Figure 2This is a flowchart illustrating the information feedback method provided in an embodiment of this application. For a description of the first, second, or third station involved in this method, please refer to... Figure 1a or Figure 1b And so on, which will not be detailed here. For example, the first site can be a non-AP STA1, the second site can be an AP, and the third site can be a non-AP STA2. For example, the first site can be T node 1, the second site can be a G node, and the third site can be T node 2. The specific product forms of the first, second, or third site will not be listed here.

[0104] As an example, the third station is the same as the second station. The second station is both the transmitter and receiver of the first signal. For instance, the first station feeds back the second signal using a second feedback type, thereby ensuring that only the second station can determine the channel information, improving information security. Alternatively, the first station can feed back the second signal using a first feedback type, reducing implementation complexity.

[0105] As another example, the third station differs from the first station and also from the second station. The third station is the transmitter of the first signal, and the second station is the receiver of the second signal. For instance, the target receiver of the first signal may not be the first station. In this case, the first station can still use the first signal to feed back the second signal, improving resource utilization. The first station feeds back the second signal using a second feedback type, thereby ensuring that only the second station can determine the channel information, improving information security. The first station feeding back the second signal using a first feedback type reduces implementation complexity.

[0106] like Figure 2 As shown, the method includes:

[0107] 201. The third station sends a signal. Correspondingly, the first station receives the first signal, which is the signal sent by the third station after being transmitted through the channel.

[0108] As an example, the first signal is the information obtained after the first reference information has been transmitted through the channel. The information obtained after the first reference information has been transmitted through the channel can be the second reference information, that is, the first signal is the second reference information. In this case, the first signal can be used for sensing. The first reference information can be used for channel estimation. The first reference information can be used for more than just channel estimation, but also for other functions, which is not limited in this application embodiment. The first reference information can also be called known information or predefined information, that is, information known to both the sender and receiver. If a set of reference information is agreed upon, the first reference information is the information in that set of reference information. The above-mentioned set of reference information can be defined by a standard, or defined by a third station, or negotiated by a third station and a first station, or negotiated by a third station and other stations, which is not limited in this application embodiment.

[0109] As another example, the first signal is information that has been transmitted through the channel after non-reference information has been received. In this case, the first signal can be used for both communication and sensing. Non-reference information can also be referred to as unknown information.

[0110] In this embodiment of the application, even if the first signal is information transmitted through the channel after non-reference information is transmitted, the first station can still determine the second information based on the first signal. The second information can be used by the second station to determine the channel information between the first station and the third station.

[0111] The target receiver of the first signal may be the first station, or it may not be the first station (such as the second station or a station other than the first and second stations). For example, the target medium access control (MAC) address in the first signal indicates that the target receiver is the first station, or another station. Or, for example, the target identifier in the first signal indicates that the target receiver is the first station, or another station.

[0112] In one possible implementation, before the first station receives the first signal, Figure 2 The method further includes: a second station sending a second indication message, and a first station receiving the second indication message, the second indication message being used to indicate the resources for transmitting the first signal.

[0113] The second indication information may be included in the control information, such as DCI or link control information sent by the G node. Alternatively, the second indication information may be included in higher-layer signaling or radio frames, etc., and this application embodiment does not limit this.

[0114] Optionally, the resource for transmitting the first signal is included in the first resource. This first resource is a resource for sensing. That is, the first resource has been configured to perform a sensing task. Alternatively, the first resource can be used to transmit reference information. The resource for transmitting the first signal, as indicated by the second indication information, can be the first resource.

[0115] Optionally, the resource for transmitting the first signal can be a second resource among the first resources. This second resource is a resource used for communication and sensing. Alternatively, the second resource can be used to transmit non-reference information. For example, the resource for transmitting the first signal indicated by the second indication information can be a second resource among the first resources. That is, although the first resource is configured for transmitting reference information, the second indication information can indicate that the second resource among the first resources is used for transmitting non-reference information. Optionally, the resource for transmitting the first signal can also be other resources among the first resources besides the second resource. This other resource can be used to transmit reference information.

[0116] The information indicating the first resource and the information indicating the second resource may be included in the same second instruction information or in different second instruction information, such as the information indicating the first resource being included in second instruction information #1 and the information indicating the second resource being included in second instruction information #2.

[0117] In one possible implementation, the resources for transmitting the first signal are included within the resources for transmitting information A. This information A includes, but is not limited to, control information, broadcast signals, channel status information reference signals (CSI-RS), or sounding reference signals (SRS). Optionally, the first signal may or may not be information A. Transmitting non-information A within the resources used for transmitting information A is because there is no information A to transmit in a portion of the resources used for transmitting information A; thus, by multiplexing idle resources to transmit non-information A, resource utilization is improved.

[0118] In one possible implementation, before the first station receives the first signal, Figure 2 The method shown further includes: a second station sending third indication information, and a first station receiving the third indication information, which is used to indicate whether the first signal is second reference information or non-reference information.

[0119] In other words, before the first station receives the first signal, the second station can indicate to the first station whether the first signal received by the first station is reference information or non-reference information. This allows the first station to promptly and effectively ascertain the type of the first signal (reference information or non-reference information). Optionally, the first station can also determine the feedback type based on the type of the first signal. The method for determining the feedback type is detailed below and will not be elaborated upon here.

[0120] The third indication information may be included in the control information, such as DCI or link control information sent by the G node. Alternatively, the third indication information may be included in higher-layer signaling or radio frames, etc., and this application embodiment does not limit this.

[0121] As an example, the type of the first signal can be explicitly indicated by the third indication information. This third indication information can occupy one bit, and different values ​​of this bit can correspond to different types of the first signal. Alternatively, the third indication information can occupy two bits, and so on, without further listing. Furthermore, the third indication information can carry an index of reference information, which can be information from a set of reference information. For example, an index of 0 indicates that the third indication information is non-reference information, while an index greater than 0 indicates that the third indication information is reference information.

[0122] As another example, the type of the first signal can be determined by the function of the third indication information itself. For instance, if the third indication information is included in the DCI, the DCI can implicitly indicate that the first signal is non-reference information when it is used to schedule the first site or to allocate resources to the first site. That is, the DCI can also implicitly indicate that the first signal is non-reference information when it performs its original function.

[0123] 202. The first station sends a second signal to the second station according to the feedback type. This second signal is used by the second station to determine the channel information between the first station and the third station. Correspondingly, the second station receives the second signal.

[0124] The second signal is used to determine the channel information between the first and third stations. The feedback type corresponds to the type of the second signal. In other words, the feedback type determines the type of the second signal. Different feedback types contain different information in the second signal.

[0125] When the feedback type is the first feedback type, the second signal includes first information, which is channel information determined based on the first signal and the first reference information. Optionally, the first signal is the information after the first reference information has been transmitted through the channel, i.e., the second reference information.

[0126] When the feedback type is the second feedback type, the second signal includes second information, which is information determined based on the first signal, and the second information is different from the first information. For example, the second information is determined based on the first signal, but not based on the first reference information. That is, the first station did not use the first reference information in determining the second information. As an example, the first signal is the second reference information. As another example, the first signal is not reference information.

[0127] Figure 2 This example illustrates the transmission of a second signal from the first station to the second station. In a more concrete implementation, the first station can also report the second signal to other stations. For instance, the first station can send the second signal to station A, which is not the second station.

[0128] The first and second information are explained in detail below.

[0129] The first information is the channel information obtained by the first station after performing channel estimation based on the first signal and the first reference information. For example, the first information may be channel status information (CSI), channel frequency response (CFR), or channel impulse response (CIR), etc.

[0130] As an example, the first information includes channel information for all subcarriers. For instance, the CSI mentioned above includes the CSI of each individual subcarrier in the entire spectrum. Similarly, the CFR mentioned above includes the CFR of all subcarriers. All subcarriers are all subcarriers on the resources used to transmit the first signal.

[0131] As another example, the first information includes channel information for a portion of the subcarriers. For instance, the CSI mentioned above includes the CSI for a portion of the subcarriers. Similarly, the CFR mentioned above includes the CFR for a portion of the subcarriers.

[0132] In other words, the first station can use either a full feedback mode or a partial feedback mode to feed back the first information. For the full feedback mode, the first information includes channel information for all subcarriers. For the partial feedback mode, the first information includes channel information for a portion of the subcarriers. The feedback mode can be determined by the first station, negotiated by the first and second stations, or defined by a standard, etc. This application embodiment does not limit the method of determining the feedback mode. Optionally, if the feedback mode is determined by the first station, the second signal may further include information indicating the feedback mode, which may include a full feedback mode or a partial feedback mode. Details regarding the feedback mode can be found in the description of the feedback type, and will not be elaborated here. Optionally, the method of determining the feedback mode can be the same as or different from the method of determining the feedback type; this application embodiment does not limit this.

[0133] In this embodiment, the module used to determine channel information can be called a channel estimation module. The process by which the first station estimates channel information based on the first signal and the first reference information can be called a channel estimation process, and the module that implements this process is called the channel estimation module.

[0134] Optionally, for the first signal, the first station may perform at least one of the following processes: cyclic prefix removal (CP), serial-to-parallel conversion, discrete fourier transform (DFT), channel estimation, equalization, demapping, or parallel-to-serial conversion.

[0135] Figure 3 This is a schematic diagram of the signal processing flow provided in an embodiment of this application. For example... Figure 3 As shown, the signal transmitted by the second station can undergo the following processing: serial-to-parallel conversion, mapping, inverse discrete Fourier transform (IDFT), parallel-to-serial conversion, or addition of CP. For example... Figure 3 As shown, the first signal can undergo the following processing: CP removal, serial-to-parallel conversion, DFT, channel estimation, equalization, demapping, or parallel-to-serial conversion. The first station can obtain the first information through the channel estimation module. Figure 3 The signal processing procedures shown are merely examples and are not intended to limit the embodiments of this application.

[0136] For example, for a subcarrier k, the signal transmitted by the second station is... N TX This indicates the number of transmitting antennas. The signal received by the first station is... N RX This indicates the number of receiving antennas. The received signal and the transmitted signal can satisfy the following relationship:

[0137] y k =H k x k +n

[0138] Among them, H k N represents RX ×N TX A channel matrix of dimension n, where each element can be called a channel coefficient, and n is white Gaussian noise.

[0139] CSI can be an estimate of the channel coefficients mentioned above. For a single-input single-output (SISO) system, H... k It includes a channel coefficient, which is a complex value corresponding to subcarrier k.

[0140] The second information is the combined information of the transmitted signal without channel estimation (i.e., the signal transmitted by the third station) and CSI. Alternatively, the second information is the information of the first signal before channel estimation processing. Or, the second information is information determined based on the first signal, but not on the first reference information. Or, the second information is information about the first signal before it is transmitted to the channel estimation module.

[0141] by Figure 3 For example, the information of the first signal after DFT processing is not input to the channel estimation module, and the second information is the output information after DFT. The first signal can be processed as follows: CP removal, serial-to-parallel conversion, and DFT.

[0142] As an example, the second information is information determined based on the first signal, but not on the first reference information. As another example, the second information is information determined based on a portion of the first signal, or a portion of the information determined by the first signal. That is, the first station can use either a full feedback mode or a partial feedback mode to feed back the second information. For an explanation of the feedback modes, please refer to the above; further details will not be provided here.

[0143] Optionally, the feedback type can be determined before the first station sends the second signal. The following describes how the feedback type is determined.

[0144] As one possible implementation method, the feedback type is defined by the standard. This simplifies implementation and improves efficiency.

[0145] As an example, the standard can define the feedback type as either the first feedback type or the second feedback type.

[0146] As another example, a standard can define the correspondence between feedback types and the type of the first signal. If the first signal is second reference information, then the feedback type can be the first feedback type. Conversely, if the first signal is non-reference information, then the feedback type can be the second feedback type.

[0147] As another example, the standard can define the correspondence between feedback types and resources used to transmit the first signal. Optionally, if the resources used to transmit the first signal are included in the resources used to transmit information A, the feedback type can be either the second feedback type or the first feedback type. For example, if information A is control information, the feedback type is the second feedback type. As another example, if information A is a broadcast signal, the feedback type can be either the first or the second feedback type. If the resources used to transmit the first signal are the second resource within the first resources, the feedback type can be the second feedback type. If the resources used to transmit the first signal are other resources within the first resources besides the second resource, the feedback type can be either the first or the second feedback type.

[0148] As another possible implementation method 2, the feedback type is determined through negotiation between the first and second stations. For example, the first and second stations can exchange feedback types via signaling. This allows for flexible support of different scenario requirements.

[0149] Figure 4a This is a schematic diagram of an interaction flow for a feedback type provided in an embodiment of this application. For example... Figure 4a As shown, the second station sends a first indication message to the first station. This first indication message is used to indicate the feedback type, or in other words, it is used to determine the feedback type. Correspondingly, the first station receives this first indication message. Optionally, as... Figure 4a As shown, the first station sends a response message to the second station, which is used to respond to the first instruction message. The response message can be used to confirm the first instruction message, or it can be used to suggest a feedback type. Correspondingly, the second station receives the response message.

[0150] Figure 4b This is a schematic diagram of another interaction flow for the feedback type provided in an embodiment of this application. For example... Figure 4b As shown, the first station sends a first indication message to the second station. This first indication message is used to indicate the feedback type, or in other words, to determine the feedback type. Correspondingly, the second station receives this first indication message. Optionally, as... Figure 4b As shown, the second station sends a response message to the first station, which is used to respond to the first instruction message. The response message can be used to confirm the first instruction message, or it can be used to suggest a feedback type. Correspondingly, the first station receives the response message.

[0151] The following is an introduction Figure 4a and Figure 4b The first instruction information and response information involved.

[0152] As an example, the first indication information and the response information are contained in a radio frame. For instance, the first indication information is contained in a sensing measurement request frame, and the response information is contained in a sensing measurement response frame. The sensing measurement response frame is used to respond to the sensing measurement request frame. The sensing measurement request frame can be sent by the sensing initiator, and the sensing measurement response frame can be sent by the sensing responder.

[0153] Figure 5a This is a schematic diagram illustrating the format of the perception measurement request frame provided in an embodiment of this application. For example... Figure 5a As shown, the sensing measurement request frame includes at least one of the following: category, public action / protected dual of public action, dialog token, sensing comeback info, measurement session ID indication, and sensing measurement parameter element. The sensing measurement parameter element may include at least one of the following: element ID, length, element ID extension, sensing measurement parameters, and sensing sub-element. Optionally, the first indication information may be included in the feedback type field of the sensing measurement parameter field. For example, the feedback type field may be located in all or part of bits B35-B39 of the sensing measurement parameter field. Figure 5a This example uses a feedback type field occupying 1 bit, but it is not intended to limit the embodiments of this application. The relationship between the value and meaning of the feedback type field is as follows: 1 represents the first feedback type, and 0 represents the second feedback type. The relationship between the values ​​and meanings shown here is merely an example and is not intended to limit the embodiments of this application.

[0154] Figure 5b This is a schematic diagram of the format of the sensing measurement response frame provided in an embodiment of this application. For example... Figure 5bAs shown, the perception measurement response frame includes a status code field. This status code field indicates that in cases of rejection with suggested changes, the perception measurement response frame may include perception measurement parameters to suggest that the perception initiator modify the perception measurement parameters. Optionally, response information may be included in the feedback type field within the perception measurement parameter field. About Figure 5b Other instructions can be found here. Figure 5a This will not be elaborated upon here.

[0155] For example, the first instruction information and response information are contained in the higher-level signaling.

[0156] For example, the first indication information is included in the control information. This control information can be DCI, or it can be link control information sent by the G node, etc.

[0157] As another possible implementation method 3, the feedback type is determined by the first site.

[0158] As an example, before step 202, the first station can determine the feedback type. For instance, after receiving the second indication information, the first station determines the feedback type based on the resources used to transmit the first signal. Alternatively, after receiving the third indication information, the first station determines the feedback type based on the type of the first signal. Or, the first station can determine the feedback type itself.

[0159] Optionally, after determining the feedback type, the first station can indicate that feedback type to the second station. For example, the first station can send a first indication message to the second station. A description of the first indication message can be found in Implementation Method 2 above, and will not be detailed here.

[0160] Optionally, after determining the feedback type, the first station can carry that feedback type in the second signal. That is, the second signal includes information indicating the feedback type. Optionally, the second information (or the first information) in the second signal follows the information indicating the feedback type. Therefore, after receiving the second signal, the second station can first determine the feedback type, and then parse the second or first information according to the feedback type. The order of the first information (or the second information) and the information indicating the feedback type in the second signal is not limited in this embodiment.

[0161] 203. The second station determines the channel information between the first station and the third station based on the second signal.

[0162] As an example, the second signal includes second information and information indicating the type of feedback. Alternatively, the second signal includes first information and information indicating the type of feedback. Optionally, the information indicating the type of feedback is placed before the first or second information.

[0163] As another example, the second station knows the feedback type before receiving the second signal. The second station can determine the channel information between the first and third stations based on the second signal and the feedback type.

[0164] If the feedback type is the first feedback type, then the first information received by the second station is the channel information between the first station and the third station.

[0165] If the feedback type is the second feedback type, then the second information received by the second station is information determined based on the first signal and not based on the first reference information. The second station can perform channel estimation on the second information to parse out the channel information.

[0166] When the third station is different from the second station, and the target receiver of the first signal is the second station, the second station determines the channel information between the first station and the third station based on the second signal and the signal it receives from the third station.

[0167] When the third station is different from the second station, and the target receiver of the first signal is not the second station, the second station can determine the signal transmitted by the third station before determining the channel information between the first and third stations based on the second signal. For example, the third station can indicate the signal it transmitted to the second station. Alternatively, the third station and the second station can exchange information about the signal transmitted by the third station via signaling.

[0168] For example, when the second signal includes second information, after the first station obtains the second information, it can add a cyclic redundancy check (CRC) and / or a preamble. After receiving the second signal, the second station can parse the second information from the preamble. If the CRC check of the second information is successful, it indicates that the second information obtained by the second station is correct. Therefore, the second station can perform channel estimation based on the second information and the signal sent by the third station to obtain the channel information between the first and third stations. It is understood that the influence of noise can be ignored in this embodiment. Whether the second information includes noise is not limited.

[0169] In this embodiment, regardless of whether the first signal is a signal obtained after the reference information has been transmitted through the channel, the first station can feed back a second signal based on the first signal, thereby allowing the second station to obtain the channel information between the first and third stations based on the second signal. This improves the overall efficiency of sensing and communication.

[0170] When the first signal is a signal obtained after non-reference information has been transmitted through the channel, not only is normal communication between the first and third stations guaranteed, but the second station can also obtain the aforementioned channel information. Therefore, the first station can respond with the second signal based on different feedback types, adapting to different application scenarios and further improving the overall efficiency of sensing and communication.

[0171] The method provided in this application can be divided into four stages: a negotiation stage, a signal transmission stage, a reporting stage (or feedback stage), and a resolution stage (or channel information determination stage). The negotiation stage is used to determine at least one of the following: resources for transmitting a first signal, the type of the first signal, or the feedback type. The signal transmission stage is used for the third station to transmit a signal, and for the first station to receive the signal after it has passed through the channel. The reporting stage is used to feed back a second signal. The resolution stage is used to determine the channel information between the first station and the third station. The method provided in this application is illustrated below with specific examples. The examples shown below use the case where the third station and the second station are the same; for schemes where the third station and the second station are different, please refer to... Figure 2 The explanations and references to Examples 1 through 6 are not detailed hereafter. (Above) Figure 2 For details on the relevant content, but not described in detail, please refer to Examples 1 to 6 below.

[0172] Example 1

[0173] (1) Negotiation stage:

[0174] The first site determines the type of feedback.

[0175] For specific methods on determining the feedback type, please refer to Implementation Methods 1 to 4 above, which will not be detailed here.

[0176] (2) Signal transmission stage:

[0177] The second station sends a signal, and the first station receives the first signal. This first signal refers to the signal sent by the second station that arrives at the first station after passing through the channel between the two stations.

[0178] (3) Reporting stage:

[0179] The first station sends a second signal based on the feedback type.

[0180] If the feedback type is the first feedback type, then the second signal includes the first information. If the feedback type is the second feedback type, then the second signal includes the second information.

[0181] (4) Analysis phase:

[0182] After receiving the second signal, the second station determines the channel information between the first station and the second station based on the feedback type.

[0183] For details regarding Example 1, please refer to [link / reference]. Figure 2 This will not be elaborated upon here.

[0184] Example 2

[0185] (1) Negotiation stage:

[0186] The first and second stations negotiate to use the signals on the resources occupied by the DCI transmission (i.e., the resources used for DCI transmission) for sensing and measurement.

[0187] Optionally, the first and second sites can also negotiate the feedback type. For example, the feedback type could be the second feedback type.

[0188] Alternatively, in scenarios where sensing is achieved using the resources occupied by the transmission DCI (i.e., Example 2), the feedback type can also be defined by the standard, such as the second feedback type.

[0189] Optionally, the feedback type can also be determined by the first station based on the type of the first signal it receives. If the first station can correctly parse the first signal, such as if the first signal is a DCI sent to the first station by the second station, or if the first signal is reference information, then the first station can determine the feedback type as a first feedback type. If the first station cannot correctly parse the first signal, such as if the first signal is not a DCI sent to the first station by the second station, then the first station can determine the feedback type as a second feedback type. When the feedback type is determined by the first station based on the type of the first signal, the second signal may further include information indicating the feedback type.

[0190] (2) Signal transmission stage:

[0191] The second station sends a signal, and the first station receives the first signal. This first signal refers to the signal sent by the second station that arrives at the first station after passing through the channel between the two stations.

[0192] The first signal can be of the following types:

[0193] 1. The second station sends a DCI to the first station using the resources occupied by the DCI transmission. That is, the first signal can be a DCI. This DCI can be a DCI sent from the second station to the first station, or it can be a DCI not sent to the first station. Even if it is not a DCI sent to the first station, the first station can still determine the second signal based on the DCI, and the second signal includes the second information.

[0194] 2. The second station sends a non-DCI signal to the first station using the resources occupied by the DCI transmission. That is, the first signal can be a non-DCI signal. The first station determines the second signal based on the non-DCI signal, and the second signal includes the second information.

[0195] Typically, resources allocated for DCI (Digital Channel Interception) are periodic. Therefore, within the resources designated for DCI transmission, there may or may not be DCI transmission. When there is no DCI transmission within the designated DCI transmission resources, the second station can achieve sensing by transmitting non-DCI data on the same resources, thus avoiding resource waste. For example, in scenarios where both the sender and receiver need to intensively acquire channel information, implementing sensing on the resources designated for DCI transmission can improve resource utilization and achieve sensing capabilities, thereby enhancing the overall efficiency of communication and sensing.

[0196] Example 2 illustrates the control information as DCI. In a Starflash communication system, the control information can also be information sent by a G station to one or more T stations in the domain.

[0197] (3) Reporting stage:

[0198] The first station sends a second signal based on the feedback type. Optionally, the feedback type is a second feedback type, and the second signal includes second information. Optionally, the feedback type is a first feedback type, and the second signal includes first information.

[0199] (4) Analysis phase:

[0200] After receiving the second signal, the second station determines the channel information between the first station and the second station based on the feedback type.

[0201] For details regarding Example 2, please refer to [link / reference]. Figure 2 This will not be elaborated upon here.

[0202] Example 3

[0203] (1) Negotiation stage:

[0204] The first and second stations negotiate to use the resources occupied by the broadcast signal for sensing and measurement. Generally, the format or content of the broadcast signal can be determined by both the sender and receiver, so the broadcast signal can also be considered as reference information.

[0205] Optionally, the first and second sites can also negotiate the feedback type. For example, the feedback type can be either the first feedback type or the second feedback type.

[0206] Alternatively, in scenarios where sensing is achieved using resources occupied by transmitting broadcast signals (i.e., Example 3), the feedback type can also be defined by a standard, such as a second feedback type or a first feedback type.

[0207] Optionally, the feedback type can also be determined by the first station based on the type of the first signal it receives. For example, if the first signal is a broadcast signal, the feedback type can be a first feedback type. Or, if the first signal is a non-broadcast signal, and that non-broadcast signal is reference information, then the feedback type can be a first feedback type; if that non-broadcast signal is non-reference information, then the feedback type can be a second feedback type. When the feedback type is determined by the first station, the second signal may also include information indicating the feedback type.

[0208] (2) Signal transmission stage:

[0209] The second station sends a signal, and the first station receives the first signal. This first signal refers to the signal sent by the second station that arrives at the first station after passing through the channel between the two stations.

[0210] The first signal can be of the following types:

[0211] 1. The second station sends a broadcast signal to the first station using the resources occupied by the broadcast signal. That is, the first signal is a broadcast signal.

[0212] 2. The second station sends a non-broadcast signal to the first station using the resources occupied by the broadcast signal. That is, the first signal is a non-broadcast signal. This non-broadcast signal can be reference information or non-reference information. When the non-broadcast signal is the signal after reference information has been transmitted through the channel, the feedback type can be the first feedback type. When the non-broadcast signal is the signal after non-reference information has been transmitted through the channel, the feedback type can be the second feedback type.

[0213] For resource descriptions of Example 3, please refer to the description of Example 2; they will not be elaborated upon here.

[0214] The first station sends a second signal based on the feedback type. Optionally, the feedback type is a first feedback type, and the second signal includes the first information. Alternatively, the feedback type is a second feedback type, and the second signal includes the second information.

[0215] (4) Analysis phase:

[0216] After receiving the second signal, the second station determines the channel information between the first station and the second station based on the feedback type.

[0217] For details regarding Example 3, please refer to [link / reference]. Figure 2 This will not be elaborated upon here.

[0218] For Examples 2 and 3, control information (such as DCI) or broadcast signals can be used for sensing measurements, thus eliminating the need to allocate resources separately for sensing.

[0219] Example 4

[0220] (1) Negotiation stage:

[0221] The second station sends a second indication message to the first station, which indicates the resources for transmitting the first signal. Correspondingly, the first station receives the second indication message.

[0222] The second station sends a third indication message to the first station, which indicates whether the first signal is a second reference message or a non-reference message. Correspondingly, the first station receives the third indication message.

[0223] For explanations regarding the second and third instruction information, please refer to [link / reference]. Figure 2 This will not be elaborated upon here.

[0224] (2) Signal transmission stage:

[0225] The second station sends a signal, and the first station receives the first signal. This first signal refers to the signal sent by the second station that arrives at the first station after passing through the channel between the two stations.

[0226] (3) Reporting stage:

[0227] If the first signal is the second reference information, the feedback type is either the first feedback type or the second feedback type. If the first signal is not the reference information, the feedback type is the second feedback type.

[0228] The first station sends a second signal based on the feedback type.

[0229] (4) Analysis phase:

[0230] After receiving the second signal, the second station determines the channel information between the first station and the second station based on the feedback type.

[0231] For details regarding Example 4, please refer to [link / reference]. Figure 2 This will not be elaborated upon here.

[0232] Example 5

[0233] (1) Negotiation stage:

[0234] The first station and the second station negotiate the resources used for sensing and measurement. The resource used for sensing and measurement is designated as the first resource.

[0235] The first and second stations need to transmit non-reference information on the first resource (if there is a downlink communication service requirement). This non-reference information can be used for communication and sensing. Therefore, the first and second stations can interact to transmit non-reference information on the resource through signaling (such as second indication information). For example, the resource for transmitting non-reference information can be the second resource.

[0236] Optionally, the first site determines the feedback type. For details on how to determine the feedback type, please refer to Implementation Methods 1 through 4 above; they will not be elaborated upon here.

[0237] (2) Signal transmission stage:

[0238] The second station sends a signal, and the first station receives the first signal. This first signal refers to the signal sent by the second station that arrives at the first station after passing through the channel between the two stations.

[0239] The first signal can be of the following types:

[0240] 1. The first signal is the second reference information. For example, if the signal sent by the second station is a known signal to the first station, the first signal is used for sensing.

[0241] 2. The first signal is non-reference information. If the first signal is not a known signal to the first station, it can be used for both sensing and communication. That is, the second station can occupy the second resource in the first resource, which can be used for both communication and sensing.

[0242] (3) Reporting stage:

[0243] The first station sends a second signal based on the feedback type. This second signal includes either the first or second information. It also includes information indicating the feedback type.

[0244] For example, the feedback type can be determined by the first station. Optionally, the feedback type determined by the first station can be a second feedback type. Optionally, the first station can determine the feedback type based on the type of the first signal.

[0245] (4) Analysis phase:

[0246] After receiving the second signal, the second station determines the channel information between the first station and the second station based on the feedback type.

[0247] For details regarding Example 5, please refer to [link / reference]. Figure 2 This will not be elaborated upon here.

[0248] The following describes the communication device provided in the embodiments of this application.

[0249] This application divides the communication device into functional modules according to the above-described method embodiments. For example, each function can be divided into its own functional modules, or two or more functions can be integrated into one processing module. The integrated modules can be implemented in hardware or as software functional modules. It should be noted that the module division in this application is illustrative and represents only one logical functional division; other division methods may be used in actual implementation. The following will combine... Figures 6 to 8 The communication device of the embodiments of this application is described in detail.

[0250] Figure 6 This is a schematic diagram of a communication device provided in an embodiment of this application. For example... Figure 6 As shown, the communication device includes a processing module 601 and a transceiver module 602. The transceiver module 602 can implement corresponding communication functions, and the processing module 601 is used to implement corresponding processing functions. The transceiver module 602 can also be referred to as an interface, communication interface, or communication module, etc.

[0251] In some embodiments of this application, the communication device can be used to perform the actions performed by the first station in the above method embodiments. In this case, the first station can be the device itself or a chip or functional module configurable in the device. The transceiver module 602 is used to perform the transceiver-related operations of the first station in the above method embodiments, and the processing module 601 is used to perform the processing-related operations of the first station in the above method embodiments.

[0252] For example, transceiver module 602 is used to receive or input a first signal; processing module 601 is used to determine the feedback type; transceiver module 602 is also used to send or output a second signal.

[0253] For example, the transceiver module 602 is also used to receive or input first instruction information.

[0254] For example, the transceiver module 602 is also used to receive or input second instruction information.

[0255] For example, transceiver module 602 is also used to receive or input third instruction information.

[0256] For explanations of the first signal, feedback type, second signal, first indication information, second indication information, or third indication information, please refer to the above text, which will not be elaborated here.

[0257] Reuse Figure 6 In other embodiments of this application, the communication device can be used to perform the actions performed by the second station in the above method embodiments. In this case, the second station can be the device itself or a chip or functional module configurable in the device. The transceiver module 602 is used to perform the transceiver-related operations of the second station in the above method embodiments, and the processing module 601 is used to perform the processing-related operations of the second station in the above method embodiments.

[0258] For example, the transceiver module 602 is used to receive the second signal; the processing module 601 is used to determine channel information based on the second signal.

[0259] For example, the transceiver module 602 is also used to send or output first indication information.

[0260] For example, the transceiver module 602 is also used to send or output second instruction information.

[0261] For example, the transceiver module 602 is also used to send or output third instruction information.

[0262] For explanations of the first signal, feedback type, second signal, first indication information, second indication information, or third indication information, please refer to the above text, which will not be elaborated here.

[0263] Reuse Figure 6 In some other embodiments of this application, the communication device can be used to perform the actions performed by the third station in the above method embodiments. In this case, the third station can be the device itself or a chip or functional module configurable in the device. The transceiver module 602 is used to perform the transceiver-related operations of the third station in the above method embodiments, and the processing module 601 is used to perform the processing-related operations of the third station in the above method embodiments.

[0264] For example, processing module 601 is used to determine the signal type. For example, transceiver module 602 is used to send the signal.

[0265] For example, the transceiver module 602 is also used to send or output first indication information.

[0266] For example, the transceiver module 602 is also used to send or output second instruction information.

[0267] For example, the transceiver module 602 is also used to send or output third instruction information.

[0268] For explanations of the first signal, feedback type, second signal, first indication information, second indication information, or third indication information, please refer to the above text, which will not be elaborated here.

[0269] For example, the transceiver module 602 described above can be an antenna module. Alternatively, the transceiver module 602 can be an input / output module. Optionally, in the above embodiments, the communication device may further include a storage module, which can be used to store instructions and / or data. The processing module 601 can read the instructions and / or data from the storage module to enable the communication device to implement the aforementioned method embodiments.

[0270] The specific descriptions of the transceiver module and processing module shown in the above embodiments are merely examples. For the specific functions or execution steps of the transceiver module and processing module, please refer to the above method embodiments, which will not be described in detail here.

[0271] It is understandable that the module division in the above-mentioned device is merely a logical functional division. Each function can correspond to a functional module, or two or more functions can be integrated into one functional module. In actual implementation, all or some modules can be integrated into one physical entity, or they can be distributed across different physical entities. Furthermore, the above-mentioned functional modules can be implemented in hardware, software, or a combination of both.

[0272] In one example, the functional unit in any of the above devices may be one or more integrated circuits configured to implement the above methods, such as: one or more application-specific integrated circuits (ASICs), or one or more central processing units (CPUs), one or more microcontroller units (MCUs), one or more digital signal processors (DSPs), or one or more field-programmable gate arrays (FPGAs), or a combination of at least two of these integrated circuit forms.

[0273] The communication device according to the embodiments of this application has been described above. The following describes the possible product forms of the communication device. Any device possessing the above-described... Figure 6 Any form of the communication device described herein falls within the protection scope of the embodiments of this application. The following description is merely illustrative and does not limit the product form of the communication device in the embodiments of this application to this.

[0274] In one possible implementation, Figure 6 In the communication device shown, the processing module 601 can be one or more processors, and the transceiver module 602 can be a transceiver, or the transceiver module 602 can also be a transmitting module and a receiving module. The transmitting module can be a transmitter, and the receiving module can be a receiver. The transmitting module and the receiving module are integrated into one device, such as a transceiver. In the embodiments of this application, the processor and the transceiver can be coupled, etc., and the connection method between the processor and the transceiver is not limited in the embodiments of this application. In the process of executing the above method, the process of sending information in the above method can be the process of the processor outputting the above information. When outputting the above information, the processor outputs the above information to the transceiver so that the transceiver can transmit it. After the above information is output by the processor, it may need to undergo other processing before reaching the transceiver. Similarly, the process of receiving information in the above method can be the process of the processor receiving the above information input. When the processor receives the input information, the transceiver receives the above information and inputs it into the processor. Furthermore, after the transceiver receives the above information, the above information may need to undergo other processing before being input into the processor.

[0275] Figure 7 This is another structural schematic diagram of the communication device provided in the embodiments of this application. For example... Figure 7 As shown, the communication device 70 includes one or more processors 720 and transceivers 710.

[0276] In some embodiments of this application, the communication device can be used to execute the steps, methods, or functions performed by the first station, such as the processor 720 being used to perform... Figure 6 The transceiver 710 can be used to perform the functions or steps implemented by the processing module 601 shown. Figure 6 The transceiver module 602 shown describes the functions or steps implemented by it. For detailed information on the processor 720 and transceiver 710, please refer to [link / reference needed]. Figure 6 Alternatively, the method embodiments shown above will not be described in detail here.

[0277] In other embodiments of this application, the communication device is used to execute steps, methods, or functions performed by the second station, such as the processor 720 being used to perform... Figure 6 The transceiver 710 can be used to perform the functions or steps implemented by the processing module 601 shown. Figure 6 The transceiver module 602 shown describes the functions or steps implemented by it. For detailed information on the processor 720 and transceiver 710, please refer to [link / reference needed]. Figure 6 Alternatively, the method embodiments shown above will not be described in detail here.

[0278] In other embodiments of this application, the communication device is used to execute steps, methods, or functions performed by the third site, such as the processor 720 being used to perform... Figure 6 The transceiver 710 can be used to perform the functions or steps implemented by the processing module 601 shown. Figure 6 The transceiver module 602 shown describes the functions or steps implemented by it. For detailed information on the processor 720 and transceiver 710, please refer to [link / reference needed]. Figure 6 Alternatively, the method embodiments shown above will not be described in detail here.

[0279] exist Figure 7 In various implementations of the communication apparatus shown, the transceiver may include a receiver for performing a receiving function (or operation) and a transmitter for performing a transmitting function (or operation). The transceiver is also used to communicate with other devices / appliances via a transmission medium.

[0280] Optionally, the communication device 70 may further include one or more memories 730 for storing program instructions and / or data. The memory 730 is coupled to the processor 720. The coupling in this embodiment is an indirect coupling or communication connection between communication devices, units, or modules, and can be electrical, mechanical, or other forms, used for information exchange between the communication devices, units, or modules. The processor 720 may operate in conjunction with the memory 730. The processor 720 may execute program instructions stored in the memory 730. Optionally, at least one of the above-mentioned memories may be included in the processor.

[0281] This application embodiment does not limit the specific connection medium between the transceiver 710, processor 720, and memory 730. This application embodiment... Figure 7 The memory 730, processor 720, and transceiver 710 are connected via a bus 740, and the bus is in... Figure 7 The connections between other components are shown in bold and are for illustrative purposes only, not as limiting information. The bus can be divided into address bus, data bus, control bus, etc. For ease of illustration, Figure 7 The bus is represented by a single thick line, but this does not mean that there is only one bus or one type of bus.

[0282] In the embodiments of this application, the processor may be a general-purpose processor, a digital signal processor, an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc., and can implement or execute the various methods, steps, and logic block diagrams disclosed in the embodiments of this application. The general-purpose processor may be a microprocessor or any conventional processor. The steps of the methods disclosed in the embodiments of this application can be directly manifested as being executed by a hardware processor, or being executed by a combination of hardware and software modules within the processor.

[0283] In this application embodiment, the memory may include, but is not limited to, non-volatile memory such as hard disk drive (HDD) or solid-state drive (SSD), random access memory (RAM), erasable programmable read-only memory (EPROM), read-only memory (ROM), or compact disc read-only memory (CD-ROM), etc. Memory is any storage medium capable of carrying or storing program code in the form of instructions or data structures, and capable of being read and / or written by a computer (such as the communication device shown in this application), but is not limited to this. The memory in this application embodiment may also be a circuit or any other device capable of implementing storage functions, used to store program instructions and / or data.

[0284] The processor 720 is primarily used for processing communication protocols and data, controlling the entire communication device, executing software programs, and processing software program data. The memory 730 is primarily used for storing software programs and data. The transceiver 710 may include control circuitry and an antenna. The control circuitry is primarily used for converting baseband signals to radio frequency signals and processing radio frequency signals. The antenna is primarily used for transmitting and receiving radio frequency signals in the form of electromagnetic waves. Input / output devices, such as touchscreens, displays, and keyboards, are primarily used for receiving user input data and outputting data to the user.

[0285] When the communication device is powered on, the processor 720 can read the software program in the memory 730, interpret and execute the instructions of the software program, and process the data of the software program. When data needs to be transmitted wirelessly, the processor 720 performs baseband processing on the data to be transmitted and outputs the baseband signal to the radio frequency (RF) circuit. The RF circuit then performs RF processing on the baseband signal and transmits the RF signal outward in the form of electromagnetic waves through the antenna. When data is sent to the communication device, the RF circuit receives the RF signal through the antenna, converts the RF signal into a baseband signal, and outputs the baseband signal to the processor 720. The processor 720 converts the baseband signal back into data and processes the data.

[0286] In another implementation, the radio frequency circuitry and antenna can be set up independently of the processor performing baseband processing. For example, in a distributed scenario, the radio frequency circuitry and antenna can be arranged remotely, independent of the communication device.

[0287] The communication device shown in the embodiments of this application may also have a higher... Figure 7 This application does not limit the use of other components or other related elements. The methods performed by the processor and transceiver shown above are merely examples; the specific steps performed by the processor and transceiver can be found in the methods described above. Figure 7 The dashed part indicates that it is optional.

[0288] In another possible implementation, Figure 6 In the communication device shown, the processing module 601 can be one or more logic circuits, and the transceiver module 602 can be an input / output interface, or a communication interface, or an interface circuit, or an interface, etc. Alternatively, the transceiver module 602 can also be a transmitting module and a receiving module. The transmitting module can be an output interface, and the receiving module can be an input interface. The transmitting module and the receiving module are integrated into one module, such as an input / output interface.

[0289] Figure 8 This is another structural schematic diagram of the communication device provided in the embodiments of this application. For example... Figure 8 As shown, Figure 8 The communication device shown includes logic circuit 801 and interface 802. That is, the processing module 601 can be implemented using logic circuit 801, and the transceiver module 602 can be implemented using interface 802. The logic circuit 801 can be a chip, processing circuit, integrated circuit, or system-on-chip (SoC) chip, etc., and the interface 802 can be a communication interface, input / output interface, pins, etc. For example, Figure 8 The above-mentioned communication device is used as an example of a chip, which includes a logic circuit 801 and an interface 802.

[0290] In this embodiment, the logic circuit and the interface can also be coupled to each other. The specific connection method between the logic circuit and the interface is not limited in this embodiment. For example, the logic circuit 801 can be used to perform... Figure 6 The processing module 601 shown implements the functions or steps, and the interface 802 can be used to execute such functions or steps. Figure 6 The transceiver module 602 shown illustrates the functions or steps implemented by this module. For detailed explanations of the logic circuit 801 and interface 802, please refer to [link / reference needed]. Figure 6 Alternatively, the method embodiments shown above will not be described in detail here.

[0291] The communication device shown in the embodiments of this application can implement the method provided in the embodiments of this application in hardware form, or it can implement the method provided in the embodiments of this application in software form, etc., and the embodiments of this application do not limit it in this way.

[0292] Furthermore, embodiments of this application also provide a communication system including a first station and a second station, which can be used to perform the methods in any of the foregoing embodiments. Alternatively, if the second station and the third station are different, the communication system may include a first station, a second station, and a third station. Or, the communication system may include a first station and a third station.

[0293] This application also provides a computer program for implementing the operations and / or processes performed by various sites in the methods provided in this application.

[0294] This application also provides a computer-readable storage medium storing computer code that, when executed on a computer, causes the computer to perform the operations and / or processes performed by various communication devices in the methods provided in this application.

[0295] This application also provides a computer program product comprising computer code or a computer program that, when run on a computer, causes the operations and / or processes performed by various entities in the method provided in this application to be executed.

[0296] In the embodiments provided in this application, it should be understood that the disclosed systems, communication devices, and methods can be implemented in other ways. For example, the communication device embodiments described above are merely illustrative. For instance, the division of modules is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple modules or components may be combined or integrated into another system, or some features may be ignored or not executed. In addition, the mutual coupling or direct coupling or communication connection shown or discussed may be indirect coupling or communication connection through some interfaces, communication devices, or modules, or it may be an electrical, mechanical, or other form of connection.

[0297] The modules described as separate components may or may not be physically separate. The components shown as modules may or may not be physical modules; that is, they may be located in one place or distributed across multiple network modules. Some or all of the modules can be selected according to actual needs to achieve the technical effects of the solutions provided in the embodiments of this application.

[0298] Furthermore, the functional modules in the various embodiments of this application can be integrated into one processing module, or each module can exist physically separately, or two or more modules can be integrated into one module. The integrated modules described above can be implemented in hardware or as software functional modules.

[0299] If the integrated module is implemented as a software functional module 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 this application, in essence, 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. This computer software product is stored in a readable storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this application. The aforementioned readable storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

Claims

1. An information feedback method, characterized in that, The method includes: The first station receives the first signal, which is the signal sent by the third station after being transmitted through the channel. The first station sends a second signal to the second station based on the feedback type. This second signal is used by the second station to determine the channel information between the first station and the third station. When the feedback type is a first feedback type, the second signal includes first information, which is channel information determined based on the first signal and first reference information; or, When the feedback type is the second feedback type, the second signal includes second information, which is information determined based on the first signal, and the second information is different from the first information.

2. The method according to claim 1, characterized in that, The second information, which is determined based on the first signal, includes: The second information is determined based on the first signal and information not based on the first reference information.

3. The method according to claim 1 or 2, characterized in that, The feedback type is determined through negotiation between the first site and the second site, or the feedback type is determined by the first site, or the feedback type is defined by a standard.

4. The method according to any one of claims 1-3, characterized in that, The method further includes: The first station receives first indication information, which is used to indicate the feedback type.

5. The method according to claim 4, characterized in that, The first indication information is contained in a radio frame, or the first indication information is contained in control information, or the first indication information is contained in higher-layer signaling.

6. The method according to claim 5, characterized in that, The wireless frame is either a sensing measurement request frame or a sensing measurement response frame.

7. The method according to claim 1 or 2, characterized in that, The second signal also includes information indicating the type of feedback.

8. The method according to claim 1 or 2, characterized in that, The feedback type is determined by the resource that transmits the first signal.

9. The method according to claim 1, 2, or 8, characterized in that, If the resources for transmitting the first signal are included in the resources for transmitting control information, then the feedback type is the second feedback type.

10. The method according to claim 9, characterized in that, The first signal is used to carry the control information, or the first signal is used to carry non-control information.

11. The method according to claim 1, 2, or 8, characterized in that, The resources for transmitting the first signal are included in the resources for transmitting broadcast signals, and the feedback type is either the first feedback type or the second feedback type.

12. The method according to claim 11, characterized in that, The first signal is used to carry a broadcast signal; or, the first signal is used to carry a non-broadcast signal.

13. The method according to claim 1, 2, or 8, characterized in that, If the resource transmitting the first signal is the second resource within the first resource, then the feedback type is the second feedback type; or, If the resource transmitting the first signal is another resource among the first resources besides the second resource, then the feedback type is the first feedback type.

14. The method according to claim 13, characterized in that, The first resource is a resource used for sensing, and the second resource is a resource in the first resource used for communication and sensing.

15. The method according to any one of claims 1-14, characterized in that, The method further includes: The first station receives second indication information, which is used to indicate the resources for transmitting the first signal.

16. The method according to any one of claims 1-15, characterized in that, The method further includes: The first station receives third indication information, which is also used to indicate whether the first signal is second reference information or non-reference information.

17. The method according to claim 1, 2, 15, or 16, characterized in that, If the first signal is the second reference information, then the feedback type is either the first feedback type or the second feedback type; or, If the first signal is non-reference information, then the feedback type is the second feedback type.

18. An information feedback method, characterized in that, The method includes: The second station receives a second signal, which is used by the second station to determine the channel information between the first station and the third station. The second station determines the channel information based on the second signal; wherein, When the feedback type is a first feedback type, the second signal includes first information, which is channel information determined based on the first signal and first reference information; or, When the feedback type is the second feedback type, the second signal includes second information, which is information determined based on the first signal, and the second information is different from the first information.

19. The method according to claim 18, characterized in that, The second information, which is determined based on the first signal, includes: The second information is determined based on the first signal and information not based on the first reference information.

20. The method according to claim 18 or 19, characterized in that, The feedback type is determined through negotiation between the first site and the second site, or the feedback type is determined by the first site, or the feedback type is defined by a standard.

21. The method according to claim 20, characterized in that, The method further includes: The second station sends a first indication message, which is used to indicate the feedback type.

22. The method according to claim 21, characterized in that, The first indication information is contained in a radio frame, or the first indication information is contained in control information, or the first indication information is contained in higher-layer signaling.

23. The method according to claim 22, characterized in that, The wireless frame is either a sensing measurement request frame or a sensing measurement response frame.

24. The method according to claim 18 or 19, characterized in that, The second signal also includes information indicating the type of feedback.

25. The method according to claim 18 or 19, characterized in that, The feedback type is determined by the resource that transmits the first signal.

26. The method according to claim 18, 19, or 25, characterized in that, If the resources for transmitting the first signal are included in the resources for transmitting control information, then the feedback type is the second feedback type.

27. The method according to claim 26, characterized in that, The first signal is used to carry the control information, or the first signal is used to carry non-control information.

28. The method according to claim 18, 19, or 25, characterized in that, The resources for transmitting the first signal are included in the resources for transmitting broadcast signals, and the feedback type is either the first feedback type or the second feedback type.

29. The method according to claim 28, characterized in that, The first signal is used to carry a broadcast signal; or, the first signal is used to carry a non-broadcast signal.

30. The method according to claim 18, 19, or 25, characterized in that, If the resource transmitting the first signal is the second resource within the first resource, then the feedback type is the second feedback type; or, If the resource transmitting the first signal is another resource among the first resources besides the second resource, then the feedback type is the first feedback type.

31. The method according to claim 30, characterized in that, The first resource is a resource used for sensing, and the second resource is a resource in the first resource used for communication and sensing.

32. The method according to any one of claims 18-31, characterized in that, The method further includes: The first station sends a second indication message, which is used to indicate the resources for transmitting the first signal.

33. The method according to any one of claims 18-32, characterized in that, The method further includes: The second station sends a third indication message, which is also used to indicate whether the first signal is a second reference message or a non-reference message.

34. The method according to claim 18, 19, 32, or 33, characterized in that, If the first signal is the second reference information, then the feedback type is either the first feedback type or the second feedback type; or, If the first signal is non-reference information, then the feedback type is the second feedback type.

35. A communication device, characterized in that, Includes a module for performing the method as described in any one of claims 1-34.

36. A computer-readable storage medium, characterized in that, The computer-readable storage medium is used to store a computer program, which, when executed by a computer, performs the method as described in any one of claims 1-34.

37. A computer program product, characterized in that, When the computer program product is executed by a computer, the method described in any one of claims 1-34 is performed.

38. A communication system, characterized in that, It includes a first site and a second site, wherein the first site is used to perform the method as described in any one of claims 1-17, and the second site is used to perform the method as described in any one of claims 18-34.

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