Information feedback method and apparatus

Abstract

The present application relates to the technical field of communications, and in particular to an information feedback method and apparatus. The present application can support IEEE protocols such as an IEEE 802.11be / Wi-Fi 7 / EHT protocol, an IEEE 802.11bn / UHR / Wi-Fi 8 protocol, an IEEE 802.15 / UWB protocol, an IEEE 802.11bf / sensing protocol, an integrated millimeter wave (IMMW) protocol or a NearLink protocol. In the method, upon receiving a first signal, a first station sends a second signal on the basis of a feedback type, wherein the second signal may comprise channel information determined on the basis of the first signal and first reference information, or comprise information determined on the basis of the first signal but not on the basis of first reference information. Upon receiving the second signal, a second station may determine channel information between the first station and a third station on the basis of the second signal. Therefore, the overall efficiency of sensing and communication is improved.

Description

Information feedback method and apparatus

[0001] The present application claims priority to the Chinese patent application No. 202411103661.7, filed on August 9, 2024, entitled "Information feedback method and apparatus", the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0002] The present application relates to the field of communication technology, and in particular to an information feedback method and apparatus. BACKGROUND

[0003] Wireless sensing technology refers to inferring and sensing the surrounding environment by analyzing wireless signals, such as channel status information (CSI), which are "modulated" by various obstacles. The sensing process in wireless sensing technology includes a capability interaction phase, a sensing measurement session establishment phase, a sensing measurement interaction phase, and a sensing measurement termination phase.

[0004] In the sensing measurement interaction phase, the sensing transmitter can send a null data packet (NDP) to the sensing receiver, and the NDP does not carry data. The sensing receiver receives the NDP and measures the CSI according to the received NDP.

[0005] However, the above scheme affects the overall efficiency of communication and sensing. SUMMARY

[0006] Embodiments of the present application provide an information feedback method and apparatus, which can improve the overall efficiency of communication and sensing.

[0007] In a first aspect, embodiments of the present application provide an information feedback method. The method can be applied to a first station, which can include a fifth generation (5G) communication device, a sixth generation (6G) communication device, a wireless local area network (WLAN) device (including a Wi-Fi device or a device involved in the Starlink alliance, etc.), or a chip, functional module, processing system, or communication component, etc. that can be arranged in a WLAN device. The method includes: th th The method includes:

[0008] ​The first station receives a first signal, which is a signal transmitted by the third station after channel transmission; and the first station transmits a second signal to the second station according to a feedback type, the second signal being used by the second station to determine channel information between the first station and the third station; wherein, in the case of the feedback type being a first feedback type, the second signal comprises first information, which is channel information determined according to the first signal and first reference information; or, in the case of the feedback type being a second feedback type, the second signal comprises second information, which is information determined according to the first signal, and the second information is different from the first information.

[0009] As an example, the third station can be the same as the second station. That is, the second station can determine channel information between the second station and the first station according to the second signal. As another example, the third station is different from the first station, and the third station is different from the second station. That is, the second station can determine channel information between the first station and the third station according to the second signal.

[0010] The feedback type refers to a type of the second signal fed back by the first station according to the first signal. The first signal and the second signal are named to distinguish different information, and similarly, the first information and the second information are also named to distinguish different information, and the names of the respective information or signals are only examples and do not limit the embodiments of the present application. For example, the first information and the second information can also be referred to as different signals. For another example, the first signal and the second signal can also be referred to as different information, and the like.

[0011] The first reference information described above can be used for channel estimation. Of course, the first reference information can be used not only for channel estimation but also for other functions, and the embodiments of the present application are not limited thereto.

[0012] The first signal can be a signal transmitted by the third station after channel transmission. For example, the first signal is a signal after channel transmission of reference information (for example, the first signal is second reference information), and the first signal can be used for sensing. The second reference information can be information after channel transmission of the first reference information. For another example, the first signal is a signal after channel transmission of non-reference information (that is, the first signal is non-reference information), and the first signal can be used for sensing and communication.

[0013] In the embodiments of the present application, whether the first signal is a signal after channel transmission of reference information or not, the first station can feed back the second signal according to the first signal, so that the second station can determine channel information between the first station and the third station according to the second signal. In turn, the overall efficiency of sensing and communication is improved.

[0014] When the first signal is a signal of the non-reference information after being transmitted through the channel, not only normal communication between the first station and the third station can be ensured, but also the second station can obtain the channel information. Thus, the first station feeds back the second signal according to different feedback types, which can adapt to different application scenarios and further improve the overall efficiency of sensing and communication.

[0015] In a possible implementation, the second information is determined according to the first signal and not according to the first reference information.

[0016] The first information can be channel status information (CSI) or channel frequency response (CFR) or channel impulse response (CIR) or the like. The second information can be synthesized information of a signal without channel estimation and the CSI, or in other words, the second information can be a signal without channel estimation processing of the first signal.

[0017] In the embodiments of the present application, different feedback types can correspond to different processing manners, so that the first station can feed back different second signals, match different application scenarios, and improve the overall efficiency of sensing and communication.

[0018] In a possible implementation, the feedback type is determined by negotiation between the first station and the second station, or the feedback type is defined by a standard, or the feedback type is determined by the first station.

[0019] In the embodiments of the present application, the feedback type can be determined by negotiation between stations, for example, the stations can determine the feedback type through interaction information. Alternatively, the feedback type can be determined by the first station itself, for example, after the first station determines the feedback type, the first station can feed back the feedback type in the second signal. Alternatively, the feedback type can be defined by a standard.

[0020] In a possible implementation, the method further includes: receiving, by the first station, first indication information, the first indication information being used to indicate the feedback type.

[0021] The first station can explicitly obtain the feedback type through the first indication information.

[0022] In a possible implementation, the method further includes: sending, by the first station, first indication information, the first indication information being used to indicate the feedback type.

[0023] The first station can send the first indication information to the second station. Alternatively, the first station can suggest a feedback type to the second station, and the second station can send the first indication information to the first station.

[0024] In a possible implementation, the first indication information is included in a radio frame, or the first indication information is included in control information, or the first indication information is included in high-layer signaling.

[0025] For example, the control information can include downlink control information (DCI), or link control information sent by a grant (G) node, etc.

[0026] In a possible implementation, the radio frame is a sensing measurement request frame, or a sensing measurement response frame.

[0027] In a possible implementation, the second signal further includes information indicating the feedback type.

[0028] In a possible implementation, the feedback type is determined by a resource for transmitting the first signal.

[0029] In the embodiments of the present application, the feedback type is determined by the resource for transmitting the first signal, which can also be expressed as the feedback type corresponding to the resource for transmitting the first signal. The determination of the feedback type can be defined by a standard, or determined by negotiation between the first station and the second station, which is not limited in the embodiments of the present application.

[0030] In a possible implementation, the resource for transmitting the first signal is included in a resource for transmitting control information, and the feedback type is the second feedback type.

[0031] That is, the third station can transmit the first signal in the resource for transmitting control information, and the first signal can be used to carry control information, or can be used to carry non-control information. The non-control information is transmitted in the resource for transmitting control information because the aforementioned resource can not have control information to be transmitted temporarily, so that the resource without transmitting control information is multiplexed to transmit non-control information, thereby improving the resource utilization. At the same time, the first station can also use the control information or the non-control information for sensing, thereby improving the overall efficiency of communication and sensing.

[0032] In a possible implementation, the resource for transmitting the first signal is included in a resource for transmitting a broadcast signal, and the feedback type is the first feedback type or the second feedback type.

[0033] The third station can transmit the first signal in the resource for transmitting the broadcast signal, and the first signal can be used to carry the broadcast signal or the non-broadcast signal. The non-broadcast signal is transmitted in the resource for transmitting the broadcast signal because there can be no broadcast signal to be transmitted in the resource for transmitting the broadcast signal temporarily, so that the resource in which the broadcast signal is not transmitted is multiplexed to transmit the non-broadcast signal, thereby improving the resource utilization. Meanwhile, the first station can also use the broadcast signal or the non-broadcast signal for sensing, thereby improving the overall efficiency of communication and sensing.

[0034] In the embodiments of the present application, the broadcast signal can include but is not limited to synchronization information, a master information block (MIB), and a system information block (SIB).

[0035] In a possible implementation, if the resource for transmitting the first signal is the second resource in the first resource, the feedback type is the second feedback type; or if the resource for transmitting the first signal is a resource other than the second resource in the first resource, the feedback type is the first feedback type.

[0036] In the embodiments of the present application, the first station can determine the feedback type according to different resources for transmitting the first signal. For example, the first resource can be a resource for sensing, and the second resource can be a resource for communication and sensing (such as transmitting non-reference information) in the first resource. For example, the non-reference information can be transmitted in the second resource in the resource for sensing, and the non-reference information can be used for communication between the two stations and for determining channel information, thereby improving the overall efficiency of communication and sensing.

[0037] In a possible implementation, the method further includes that the first station receives second indication information, and the second indication information is used to indicate the resource for transmitting the first signal.

[0038] In a possible implementation, the method further includes that the first station receives third indication information, and the third indication information is used to indicate whether the first signal is the second reference information or the non-reference information.

[0039] The second reference information can be information after the first reference information is transmitted through a channel. The third indication information can be sent by the second station.

[0040] In the embodiments of the present application, the third indication information can indicate the type of the first signal, and the type of the first signal can be reference information or non-reference information, so that the first station can determine the feedback type in combination with the type of the first signal.

[0041] In a possible implementation, if the first signal is the second reference information, the feedback type is 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.

[0042] In the embodiments of the present application, if the first signal is non-reference information, the feedback type can be the second feedback type, so that the second station can obtain the channel information between the first station and the third station even if the first station does not perform channel estimation. Then, the awareness is realized without affecting the communication, and the overall efficiency of the communication and the awareness is improved.

[0043] In a second aspect, the embodiments of the present application provide an information feedback method, which can be applied to a second station. The second station can include a 5G communication device or a 6G communication device or a WLAN device (including a Wi-Fi device or a device involved in the Starlink alliance, etc.), or can be a chip, a functional module, a processing system or a communication component, etc. arranged in the WLAN device. The method includes:

[0044] 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 between the first station and the third station according to the second signal. In the case of the first feedback type, the second signal includes first information, which is channel information determined according to the first signal and the first reference information. Or, in the case of the second feedback type, the second signal includes second information, which is information determined according to the first signal, and the second information is different from the first information.

[0045] The second station determines the channel information between the first station and the third station according to the second signal, including that the second station determines the channel information between the first station and the third station according to the feedback type. That is, the second station can parse the second signal according to the feedback type, and obtain the above-mentioned channel information from the second signal. The channel information can include but is not limited to CSI or CFR or CIR, etc.

[0046] The second station determines the channel information between the first station and the third station according to the second signal, including that the second station determines the feedback type according to the second signal, and determines the channel information between the first station and the third station according to the feedback type.

[0047] The other descriptions about the second aspect can refer to the first aspect, which will not be described in detail here.

[0048] In a possible implementation, the second information determined according to the first signal includes that the second information is determined according to the first signal and not according to the first reference information.

[0049] In a possible implementation, the feedback type is determined by negotiation between the first station and the second station, or the feedback type is defined by a standard, or the feedback type is determined by the first station.

[0050] In a possible implementation, the method further includes: the second station sending first indication information used for indicating the feedback type.

[0051] In a possible implementation, the method further includes: the second station receiving first indication information used for indicating the feedback type.

[0052] In a possible implementation, the first indication information is included in a radio frame, or the first indication information is included in control information, or the first indication information is included in high-layer signaling.

[0053] In a possible implementation, the radio frame is a sensing measurement request frame or a sensing measurement response frame.

[0054] In a possible implementation, the second signal further includes information used for indicating the feedback type.

[0055] In a possible implementation, the feedback type is determined by a resource for transmitting the first signal.

[0056] In a possible implementation, the resource for transmitting the first signal is included in a resource for transmitting control information, and the feedback type is the second feedback type.

[0057] In a possible implementation, the first signal is used for carrying control information, or the first signal is used for carrying non-control information.

[0058] In a possible implementation, the resource for transmitting the first signal is included in a resource for transmitting a broadcast signal, and the feedback type is the first feedback type or the second feedback type.

[0059] In a possible implementation, the first signal is used for carrying a broadcast signal, or the first signal is used for carrying non-broadcast signal.

[0060] In a possible implementation, if the resource for transmitting the first signal is a second resource in a first resource, the feedback type is the second feedback type, or if the resource for transmitting the first signal is a resource other than the second resource in the first resource, the feedback type is the first feedback type.

[0061] In a possible implementation, the first resource is a resource for sensing, and the second resource is a resource for communication and sensing in the first resource.

[0062] In a possible implementation, the method further includes: the first station sending second indication information, the second indication information being used for indicating a resource for transmitting the first signal.

[0063] In a possible implementation, the method further includes: the second station sending third indication information, the third indication information being further used for indicating that the first signal is second reference information or non-reference information.

[0064] In a possible implementation, if the first signal is the second reference information, the feedback type is the first feedback type or the second feedback type; or, if the first signal is the non-reference information, the feedback type is the second feedback type.

[0065] In a third aspect, an embodiment of the present application provides a communication apparatus, which is used for executing the method in the first aspect or the second aspect or any possible implementation.

[0066] In a fourth aspect, an embodiment of the present application provides a communication apparatus, which includes a processor and a transceiver, the processor is used for executing the processing steps in the method in the first aspect or the second aspect or any possible implementation, and the transceiver is used for executing the transceiving steps in the method in the first aspect or the second aspect or any possible implementation.

[0067] In a fifth aspect, an embodiment of the present application provides a chip, which includes a logic circuit and an interface, the logic circuit and the interface are coupled; the interface is used for inputting and / or outputting information, and the logic circuit is used for executing the processing steps in the method in the first aspect or the second aspect or any possible implementation.

[0068] In a sixth aspect, an embodiment of the present application provides a computer readable storage medium, which is used for storing a computer program, when the computer program is executed on a computer, the method in the first aspect or the second aspect or any possible implementation is executed.

[0069] In a seventh aspect, an embodiment of the present application provides a computer program product, when the computer program product is executed on a computer, the method in the first aspect or the second aspect or any possible implementation is executed.

[0070] In an eighth aspect, an embodiment of the present application provides a communication system, which includes a first station and a second station, the first station is used for executing the method in the first aspect or any possible implementation of the first aspect, and the second station is used for executing the method in the second aspect or any possible implementation of the second aspect. BRIEF DESCRIPTION OF DRAWINGS

[0071] Fig. 1a is a schematic diagram of an architecture of a communication system according to an embodiment of the present application;

[0072] Fig. 1b is a schematic diagram of another architecture of a communication system according to an embodiment of the present application;

[0073] Fig. 2 is a schematic diagram of a method of information feedback according to an embodiment of the present application;

[0074] Fig. 3 is a schematic diagram of a method of signal processing according to an embodiment of the present application;

[0075] Fig. 4a is a schematic diagram of an interaction procedure of a feedback type according to an embodiment of the present application;

[0076] Fig. 4b is a schematic diagram of another interaction procedure of a feedback type according to an embodiment of the present application;

[0077] Fig. 5a is a schematic diagram of a format of a sensing measurement request frame according to an embodiment of the present application;

[0078] Fig. 5b is a schematic diagram of a format of a sensing measurement response frame according to an embodiment of the present application;

[0079] Fig. 6 is a schematic diagram of a structure of a communication apparatus according to an embodiment of the present application;

[0080] Fig. 7 is a schematic diagram of another structure of a communication apparatus according to an embodiment of the present application;

[0081] Fig. 8 is a schematic diagram of yet another structure of a communication apparatus according to an embodiment of the present application. DETAILED DESCRIPTION

[0082] For the purpose of understanding the technical solution of the present application, the present application will be further described below with reference to the accompanying drawings.

[0083] The terms "first" and "second" and the like in the description, claims, and drawings of the present application merely mean different objects and do not imply a particular order. Furthermore, the terms "include" and "have" and any variations thereof are intended to cover a non-exclusive inclusion. For example, a process, a method, a system, a product, or an apparatus, or the like, including a series of steps or units is not limited to the listed steps or units but can optionally further include other steps or units not listed or inherent to such processes, methods, products, or apparatuses.

[0084] Reference herein to an "example" means that a particular feature, structure, or characteristic described in connection with the example can be included in at least one example of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same example, nor are they necessarily mutually exclusive or alternative examples. One of skill in the art will understand that an example described herein can be combined with another example to create another example.

[0085] In the present application, "at least one" means one or more, "multiple" means two or more, "at least two" means two or three or more, and "and / or" is used to describe the relationship between the associated objects, which means that there can be three relationships, for example, "A and / or B" can mean: only A, only B, and A and B exist at the same time, where A and B can be singular or plural. "Or" means that there can be two relationships, such as only A, only B; when A and B are not mutually exclusive, it can also mean that there are three relationships, such as only A, only B, and A and B exist at the same time. The character " / " generally represents an "or" relationship between the associated objects. "At least one of the following" or similar expressions means any combination of these items. For example, at least one 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".

[0086] In the present application, "indication" can include direct indication, indirect indication, display indication, and implicit indication. When describing an indication information for indicating A, it can be understood that the indication information carries A, directly indicates A, or indirectly indicates A.

[0087] In the present application, the information indicated by the indication information is referred to as the to-be-indicated information. In the specific implementation process, there are many ways to indicate the to-be-indicated information, for example, but not limited to, the to-be-indicated information can be directly indicated, such as the to-be-indicated information itself or the index of the to-be-indicated information. The to-be-indicated information can also be indirectly indicated by indicating other information, where the other information and the to-be-indicated information have an associated relationship. The to-be-indicated information can also be indicated only by a part, and the other part of the to-be-indicated information is known or agreed in advance. For example, the indication of a specific information can also be achieved by means of the arrangement order of each information agreed in advance (for example, the protocol stipulates), thereby reducing the indication overhead to a certain extent. In addition, the to-be-indicated information can be sent as a whole, or can be sent separately in multiple sub-information, and the sending period and / or sending time of these sub-information can be the same or different.

[0088] In the present application, "sending" and "receiving" represent the direction of signal transmission. For example, "sending information to XX" can be understood as the destination of the information is XX, which can include direct transmission through the air interface, and also includes indirect transmission through the air interface by other units or modules. "Receiving information from YY" can be understood as the source of the information is YY, which can include direct reception from YY through the air interface, and also includes indirect reception from YY through the air interface from other units or modules. "Sending" can also be understood as the "output" of the chip interface, and "receiving" can also be understood as the "input" of the chip interface. In other words, sending and receiving can be 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 a device through a bus, wire or interface.

[0089] The embodiments of the present application provide an information feedback method and device, which improve the overall efficiency of communication and perception.

[0090] The following introduces a system related to the present application.

[0091] The technical solutions provided in the embodiments of the present application can be applied to a wireless local area network (WLAN) system, such as a spark link or nearlink or Wi-Fi, and the like. The technical solutions provided in the embodiments of the present application can also be applied to a spark link standard protocol, such as a spark link low energy (SLE) wireless communication system, and the like. For example, the technical solutions provided in the embodiments of the present application can be applied to an institute of electrical and electronics engineers (IEEE) 802.11 series protocol (or standard), such as an 802.11be protocol, an 802.11bn protocol (or Wi-Fi 8, also referred to as ultra high reliability (UHR) or ultra high reliability and throughput (UHRT), and the like), a next generation protocol of the 802.11bn protocol, or an ambient power (AMP) supported protocol, and the like, which are not listed one by one. The technical solutions provided in the embodiments of the present application can also be applied to a wireless personal area network (WPAN) based on millimeter wave (MMW), such as an integrated MMW (IMMW), an ultra wideband (UWB) technology, and the like. The technical solutions provided in the embodiments of the present application can be applied to an IEEE 802.15 series protocol, such as an 802.15.4a protocol, an 802.15.4z protocol, or an 802.15.4ab protocol, or a future generation UWB WPAN protocol, and the like, which are not listed one by one. The technical solutions provided in the embodiments of the present application can also be applied to a communication system, such as an internet of things (IoT) system, a vehicle-to-everything (V2X) system, a device-to-device (D2D) system, a narrow band IoT (NB-IoT) system, a long term evolution (LTE) system, a 5th-generation (5G) communication system, and a new communication system to be developed in future communication development, and the like.For example, the V2X can include vehicle to vehicle (V2V), vehicle to infrastructure (V2I), vehicle to pedestrian (V2P) or vehicle to network (V2N) communication, etc.

[0092] The method provided by the embodiments of the present application can be implemented by a communication device in a communication system.

[0093] As a possible implementation manner, the communication device can be an access point (AP) or a station (STA).

[0094] The AP is a device with wireless communication function, supports communication or sensing or energy transmission using WLAN protocol, has the function of communication or sensing with other devices (such as non-AP station (non-AP STA) or other access points) in the WLAN network or energy transmission, and of course, can also have the function of communication or sensing or energy transmission with other devices. Alternatively, the access point is equivalent to a bridge connecting wired network and wireless network, and the main function is to connect various wireless network clients together, and then access the wireless network to the Ethernet. In the WLAN system, the access point can be called an access point station (AP STA). The device with wireless communication function can be a whole device, or a chip, processing system or functional module installed in the whole device, and the device installed with the chip or processing system or functional module can realize the method and function of the embodiments of the present application under the control of the chip or processing system or functional module. The AP in the embodiments of the present application is a device providing services for non-AP STA, and can support 802.11 series protocol or subsequent protocol, etc. For example, the access point can be an access point for terminals (such as mobile phones) to enter wired (or wireless) network, mainly deployed in homes, buildings and parks, and the typical coverage radius is dozens of meters to hundreds of meters, and of course, it can also be deployed outdoors. For another example, the AP can be a communication server, a router, a switch, a network bridge, etc. The AP can include various forms of macro base stations, micro base stations, relay stations, etc. Of course, the AP can also be a chip or processing system or module in the above various forms of devices, so as to realize the method and function of the embodiments of the present application.

[0095] The STA is a device with wireless communication function, which supports communication or sensing or energy transmission by using WLAN protocol, and has the ability to communicate or sense or energy transmission with other non-AP STAs or access points in the WLAN network. In the WLAN system, the station can be referred to as a non-access point station (non-AP STA). For example, the STA is any user communication device that allows a user to communicate or sense or energy transmission with an AP and then communicate with the WLAN. The device with wireless communication function can be a whole device, or a chip or processing system or functional module installed in the whole device. The device installed with the chip or processing system or functional module can realize the method and function of the embodiments of the present application under the control of the chip or processing system or functional module. For example, the STA can be a wireless communication chip, a wireless sensor or a wireless communication terminal, and can also be referred to as a user. For another example, the STA can be a mobile phone supporting Wi-Fi communication function, a tablet computer supporting Wi-Fi communication function, a set-top box supporting Wi-Fi communication function, a smart television supporting Wi-Fi communication function, a smart wearable device supporting Wi-Fi communication function, a vehicle-mounted communication device supporting Wi-Fi communication function, and a computer supporting Wi-Fi communication function. Of course, the STA can also be a chip or processing system or module in the above various forms of devices, thereby realizing the method and function of the embodiments of the present application.

[0096] FIG. 1a is a schematic diagram of an architecture of a communication system according to an embodiment of the present application. As shown in FIG. 1a, the embodiments of the present application can be applied to the communication or sensing between an AP and a non-AP STA, between an AP and an AP, or between a non-AP STA and a non-AP STA in a WLAN, which is not limited in the embodiments of the present application. For example, the AP can communicate or sense with a single non-AP STA, or the AP can simultaneously communicate or sense with multiple non-AP STAs. For another example, the communication or sensing between the AP and the multiple non-AP STAs can be divided into downlink transmission in which the AP sends signals to the multiple non-AP STAs, and uplink transmission in which the multiple non-AP STAs send signals to the AP. In FIG. 1a, the non-AP STA is a mobile phone and the AP is a router, which is only an example and does not limit the types of the AP and the non-AP STA in the embodiments of the present application. Meanwhile, the number of APs and the number of non-AP STAs shown in FIG. 1a are only examples, and the number of APs or non-AP STAs can be more or less in specific implementations, which is not limited in the embodiments of the present application.

[0097] As another possible implementation, the communication device can be a grant (G) station or a terminal (T) station.

[0098] The G station can have communication capability and management capability, and the management capability includes management capability on communication, such as connection management, resource scheduling, or information security management. For example, the G station can send resource management information or data scheduling information, such as access layer resource management information. The T station can have communication capability, and can transmit service with the G station. For example, the T station is a station that receives resource management information (such as access layer resource management information) or data scheduling information, and transmits data according to the resource management information or the data scheduling information. For example, the T station can include a barcode, a radio frequency identification (RFID), a sensor, a global positioning system (GPS), a laser radar, a battery, and the like.

[0099] The identities of the G station and the T station are relative. For example, in one network topology, a station A can be a G station, but in another network topology, the station A can be a T station. That is, when a station belongs to two or more network topologies, the station can be a T station in some network topologies, and can be a G station in another network topology.

[0100] FIG. 1b is another schematic diagram of a communication system according to an embodiment of the present application. The communication system can include one or more G stations and one or more T stations. FIG. 1b exemplarily shows one G station and two T stations. The T stations can be connected with the G station, and the T stations can also be connected with each other.

[0101] The communication systems shown in FIG. 1a and FIG. 1b are only examples, and are not intended to limit the embodiments of the present application.

[0102] The following describes a method according to an embodiment of the present application.

[0103] The first signal and the second signal shown below are named for distinguishing different information, and similarly, the first information and the second information are also named for distinguishing different information. The names of the information or the signals are only examples, and are not intended to limit the embodiments of the present application. For example, the first information and the second information can also be referred to as different signals. For example, the first signal and the second signal can also be referred to as different information.

[0104] FIG. 2 is a flow diagram of an information feedback method according to an embodiment of the present application. The first station, the second station, or the third station involved in the method can be referred to FIG. 1a or FIG. 1b, and will not be described in detail here. For example, the first station can be a non-AP STA1, the second station can be an AP, and the third station can be a non-AP STA2. For example, the first station can be a T node 1, the second station can be a G node, and the third station can be a T node 2. The specific product form of the first station, the second station, or the third station will not be listed here.

[0105] As an example, the third station is the same as the second station. The second station is the sending end of the first signal and the receiving end of the second signal. For example, the first station feeds back the second signal through the second feedback type, so that only the second station can determine the channel information, and the information security is improved. For example, the first station feeds back the second signal through the first feedback type, so that the implementation complexity is reduced.

[0106] As another example, the third station is different from the first station, and the third station is different from the second station. The third station is the sending end of the first signal, and the second station is the receiving end of the second signal. For example, the target receiving end of the first signal is not the first station. In this case, the first station can still feed back the second signal through the first signal, so that the resource utilization rate is improved. The first station feeds back the second signal through the second feedback type, so that only the second station can determine the channel information, and the information security is improved. The first station feeds back the second signal through the first feedback type, so that the implementation complexity is reduced.

[0107] As shown in FIG. 2, the method includes the following steps.

[0108] 201. The third station sends a signal. Correspondingly, the first station receives a first signal, which is the signal sent by the third station after channel transmission.

[0109] As an example, the first signal is the information of the first reference information after channel transmission. The information of the first reference information after channel transmission 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 not only for channel estimation, but also for other functions, which are not limited by the embodiments of the present application. The first reference information can also be referred to as known information or predefined information, that is, information known by both the sending and receiving parties. For example, a set of reference information is agreed, and the first reference information is the information in the set of reference information. The set of reference information can be defined by a standard, or defined by the third station, or negotiated by the third station and the first station, or negotiated by the third station and other stations, which are not limited by the embodiments of the present application.

[0110] As another example, the first signal is information after the non-reference information is transmitted through the channel. In this case, the first signal can be used for both communication and sensing. The non-reference information can also be referred to as non-known information.

[0111] In the embodiments of the present application, even if the first signal is information after the non-reference information is transmitted through the channel, the first station can determine the second information according to the first signal, and the second information can be used by the second station to determine the channel information between the first station and the third station.

[0112] The target receiving end of the first signal can be the first station or can not be the first station (such as the second station or a station other than the first station and the second station, etc.). For example, the target receiving end indicated by the target medium access control (MAC) address in the first signal is the first station or other stations. For another example, the target receiving end indicated by the target identifier in the first signal is the first station or other stations.

[0113] In a possible implementation, before the first station receives the first signal, the method shown in FIG. 2 further includes that the second station sends second indication information, and the first station receives the second indication information, where the second indication information is used to indicate the resource for transmitting the first signal.

[0114] The second indication information can be included in control information, such as DCI, or link control information sent by a node, etc. Alternatively, the second indication information can be included in high-layer signaling or a radio frame, etc., which is not limited in the embodiments of the present application.

[0115] Optionally, the resource for transmitting the first signal is included in first resources. The first resources are resources for sensing. That is, the first resources have been configured to perform sensing tasks. Alternatively, the first resources can be used to transmit reference information. The resource for transmitting the first signal indicated by the second indication information can be the first resources.

[0116] Optionally, the resource for transmitting the first signal can be second resources in the first resources. The second resources are resources for communication and sensing. Alternatively, the second resources can be used to transmit non-reference information. The resource for transmitting the first signal indicated by the second indication information can be the second resources in the first resources. That is, the first resources have been configured to transmit reference information, but the second resources in the first resources can be indicated by the second indication information to transmit non-reference information. Optionally, the resource for transmitting the first signal can also be other resources in the first resources except the second resources. The other resources can be used to transmit reference information.

[0117] The information indicating the first resource and the information indicating the second resource can be included in the same second indication information or different second indication information, for example, the information indicating the first resource is included in second indication information #1 and the information indicating the second resource is included in second indication information #2.

[0118] In a possible implementation, the resource for transmitting the first signal is included in the resource for transmitting information A. The information A includes, but is not limited to, control information, a broadcast signal, a channel status information reference signal (CSI-RS), a sounding reference signal (SRS), or the like. Alternatively, the first signal can be information A or not information A. The non-information A is transmitted in the resource for transmitting information A because there is no information A to be transmitted in part of the resource for transmitting information A, thereby transmitting the non-information A by multiplexing the idle resource, improving the resource utilization.

[0119] In a possible implementation, before the first station receives the first signal, the method shown in FIG. 2 further includes that the second station sends third indication information, and the first station receives the third indication information. The third indication information is used to indicate whether the first signal is second reference information or non-reference information.

[0120] That is, before receiving 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, so that the first station can timely and effectively know the type (reference information or non-reference information) of the first signal. Alternatively, the first station can also determine the feedback type according to the type of the first signal. The determination manner of the feedback type can be referred to below, which is not described here in detail.

[0121] The third indication information can be included in control information, for example, the control information can be DCI or link control information sent by a node B, or the like. Alternatively, the third indication information can be included in high-layer signaling or a radio frame, and the present embodiment is not limited in this regard.

[0122] As an example, the type of the first signal can be explicitly indicated by the third indication information. For example, the third indication information can occupy 1 bit, and different values of the 1 bit can correspond to different types of the first signal. For another example, the third indication information can occupy 2 bits, and the like, which are not listed one by one here. For another example, the third indication information can carry an index of reference information, and the reference information can be information in a reference information set. For example, index 0 indicates that the third indication information is non-reference information, and an index greater than 0 indicates that the third indication information is reference information.

[0123] As another example, the type of the first signal can be determined by the role of the third indication information itself. For example, the third indication information is contained in a DCI. In the case that the DCI is used for scheduling the first station or for allocating resources for the first station, the DCI can be used to implicitly indicate that the first signal is non-reference information. That is, in the case that the DCI implements its original role, the DCI can also implicitly indicate that the first signal is non-reference information.

[0124] 202、the first station sends a second signal to the second station according to the feedback type, the second signal being 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.

[0125] The second signal is used to determine the channel information between the first station and the third station. The feedback type corresponds to the type of the second signal. Or, the feedback type is used to determine the type of the second signal. Different feedback types, different information in the second signal.

[0126] When the feedback type is a first feedback type, the second signal includes first information, the first information being channel information determined according to the first signal and first reference information. Optionally, the first signal is second reference information after channel transmission of the first reference information.

[0127] When the feedback type is a second feedback type, the second signal includes second information, the second information being information determined according to the first signal and different from the first information. For example, the second information is determined according to the first signal but not according to the first reference information. That is, the first station does not use the first reference information in the process of determining the second information. As an example, the first signal is the second reference information. As another example, the first signal is non-reference information.

[0128] Fig. 2 is an example in which the first station sends a second signal to the second station. In a specific implementation, the first station can also report the second signal to other stations. For example, the first station can send the second signal to a station A other than the second station.

[0129] The first information and the second information are described in detail below.

[0130] The first information is channel information obtained by the first station after channel estimation according to the first signal and the first reference information. For example, the first information can be channel status information (CSI) or channel frequency response (CFR) or channel impulse response (CIR) or the like.

[0131] As an example, the first information comprises channel information of all subcarriers. As an example, the CSI comprises CSI of each of the all subcarriers. As an example, the CFR comprises CFR of all the subcarriers. The all subcarriers are all the subcarriers on the resource used for transmitting the first signal.

[0132] As another example, the first information comprises channel information of part of the subcarriers. As an example, the CSI comprises CSI of part of the subcarriers. As an example, the CFR comprises CFR of part of the subcarriers.

[0133] That is, the first station can feed back the first information in a full feedback mode or in a partial feedback mode. For the full feedback mode, the first information comprises channel information of all subcarriers. For the partial feedback mode, the first information comprises channel information of part of the subcarriers. The feedback mode can be determined by the first station, or determined by the first station and the second station, or defined by a standard, etc. The application embodiments do not limit the determination manner of the feedback mode. Optionally, in the case that the feedback mode is determined by the first station, the second signal can further comprise information for indicating the feedback mode, the feedback mode comprising the full feedback mode or the partial feedback mode. The related details of the feedback mode can be referred to the description of the feedback type, which will not be repeated here. Optionally, the determination manner of the feedback mode can be the same as or different from the determination manner of the feedback type, which will not be limited by the application embodiments.

[0134] In the application embodiments, the module for determining the channel information can be referred to as a channel estimation module. The process of estimating the channel information according to the first signal and the first reference information by the first station can be referred to as a channel estimation process, and the module for implementing the process can be referred to as a channel estimation module.

[0135] Optionally, for the first signal, the first station can perform at least one of the following processing: cyclic prefix (CP) removal, serial-parallel conversion, discrete fourier transform (DFT), channel estimation, equalization, demapping or parallel-serial conversion.

[0136] Figure 3 is a schematic flowchart of the signal processing provided in an embodiment of this application. As shown in Figure 3, 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. As shown in Figure 3, the first signal can undergo the following processing: removal of CP, 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. The signal processing process shown in Figure 3 is only an example and is not intended to limit the embodiments of this application.

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

[0138] Among them, H k N represents RX ×N T0 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] Taking Figure 3 as an 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. For example, 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 according to the first signal but not according to the first reference information. As another example, the second information is information determined according to part of the first signal, or part of the information determined according to the first signal. That is, the first station can feed back the second information in a full feedback mode, or in a partial feedback mode. The description of the feedback mode can refer to the foregoing, and will not be repeated here.

[0143] Optionally, the first station can determine the feedback type before sending the second signal. The following describes the determination of the feedback type.

[0144] As a possible implementation manner 1, the feedback type is defined by a standard. In this way, the implementation is simple, and the efficiency is improved.

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

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

[0147] As yet another example, the standard can define the correspondence between the feedback type and the resource for transmitting the first signal. Optionally, if the resource for transmitting the first signal is included in the resource for transmitting the information A, the feedback type can be the second feedback type or the first feedback type. For example, if the information A is control information, the feedback type is the second feedback type. For another example, if the information A is a broadcast signal, the feedback type is the first feedback type or the second feedback type. If the resource for transmitting the first signal is the second resource in the first resource, the feedback type can be the second feedback type. If the resource for transmitting the first signal is other than the second resource in the first resource, the feedback type can be the first feedback type or the second feedback type.

[0148] As another possible implementation manner 2, the feedback type is determined by the first station and the second station. For example, the first station and the second station interact the feedback type through signaling. In this way, different scene requirements can be flexibly supported.

[0149] Fig. 4a is a schematic diagram of an interaction flow of the feedback type according to an embodiment of the present application. As shown in Fig. 4a, the second station sends first indication information to the first station, the first indication information being used to indicate the feedback type, or in other words, the first indication information being used to determine the feedback type. Correspondingly, the first station receives the first indication information. Optionally, as shown in Fig. 4a, the first station sends response information to the second station, the response information being used to respond to the first indication information. The response information can be used to confirm the first indication information, or the response information can be used to suggest the feedback type. Correspondingly, the second station receives the response information.

[0150] Fig. 4b is another schematic diagram of an interaction flow of the feedback type according to an embodiment of the present application. As shown in Fig. 4b, the first station sends first indication information to the second station, the first indication information being used to indicate the feedback type, or in other words, the first indication information being used to determine the feedback type. Correspondingly, the second station receives the first indication information. Optionally, as shown in Fig. 4b, the second station sends response information to the first station, the response information being used to respond to the first indication information. The response information can be used to confirm the first indication information, or the response information can be used to suggest the feedback type. Correspondingly, the first station receives the response information.

[0151] The first indication information and the response information involved in Fig. 4a and Fig. 4b are described as follows.

[0152] As an example, the first indication information and the response information are contained in a wireless frame. For example, 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 a sensing initiator, and the sensing measurement response frame can be sent by a sensing responder.

[0153] Figure 5a is a format diagram of a sensing measurement request frame according to an embodiment of the present application. As shown in Figure 5a, the sensing measurement request frame includes at least one of the following: category, public action / protected dual of public action, dialog token, sensing comeback information, measurement session ID indication, sensing measurement parameters element. The sensing measurement parameters element can include at least one of the following: element ID, length, element ID extension, sensing measurement parameters, sensing subelement. Optionally, the first indication information can be contained in a feedback type field in the sensing measurement parameters field. The feedback type field can be located in all bits or part of bits of B35-B39 in the sensing measurement parameters field. Figure 5a is an example in which the feedback type field occupies 1 bit, but is not a limitation on the embodiments of the present 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 value and meaning shown here is only an example and is not a limitation on the embodiments of the present application.

[0154] Figure 5b is a format diagram of a sensing measurement response frame according to an embodiment of the present application. As shown in Figure 5b, the sensing measurement response frame includes a status code field. The status code field indicates the case of rejection and suggested changes (rejected_with_suggested_changes), and the sensing measurement response frame can include sensing measurement parameters to suggest the sensing initiator to modify the sensing measurement parameters. Optionally, the response information can be contained in a feedback type field in the sensing measurement parameters field. Other descriptions about Figure 5b can refer to Figure 5a, and will not be described in detail here.

[0155] For another example, the first indication information and the response information are contained in high layer signaling.

[0156] For another example, the first indication information is contained in control information. The control information can be DCI, or link control information sent by a G node, etc.

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

[0158] As an example, before step 202, the first station can determine the feedback type. For example, the first station determines the feedback type according to the resource for transmitting the first signal after obtaining the second indication information. For another example, the first station determines the feedback type according to the type of the first signal after obtaining the third indication information. For yet another example, the first station can determine the feedback type by itself.

[0159] Optionally, after determining the feedback type, the first station can indicate the feedback type to the second station. For example, the first station can send the first indication information to the second station. The first indication information can be implemented as described in the above-mentioned implementation manner 2, and thus will not be described in detail herein.

[0160] Optionally, after determining the feedback type, the first station can carry the feedback type in the second signal. That is, the second signal includes information for indicating the feedback type. Optionally, the second information (or the first information) in the second signal is located after the information for indicating the feedback type. In this way, after receiving the second signal, the second station can first determine the feedback type, and then parse the second information or the first information according to the feedback type. The order of the first information (or the second information) and the information for indicating the feedback type in the second signal is not limited in the embodiments of the present application.

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

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

[0163] As another example, the second station has known the feedback type before receiving the second signal. The second station can determine the channel information between the first station and the third station according to the second signal and the feedback type.

[0164] If the feedback type is the first feedback type, 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, the second information received by the second station is information determined according to the first signal and not according to the first reference information, and the second station can perform channel estimation on the second information to obtain the channel information.

[0166] When the third station is different from the second station, and the target receiving end of the first signal is the second station, the second station determines the channel information between the first station and the third station according to the second signal and the signal received by the second station from the third station.

[0167] When the third station is different from the second station, and the target receiving end of the first signal is not the second station, before the second station determines the channel information between the first station and the third station according to the second signal, the second station can determine the signal sent by the third station. For example, the third station can indicate the signal sent by the third station to the second station. For another example, the third station and the second station can interact the signal sent by the third station through signaling.

[0168] For example, when the second information is included in the second signal, after the first station obtains the second information, the first station can add a cyclic redundancy check (CRC) and / or a preamble. After the second station receives the second signal, the second station can parse the second information according to the preamble in the second signal, and when 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 according to the second information and the signal sent by the third station to obtain the channel information between the first station and the third station. It can be understood that the influence of noise can be ignored in the embodiments of the present application. The second information is not limited whether it includes noise or not.

[0169] In the embodiments of the present application, whether the first signal is a signal after the reference information is transmitted through the channel or not, the first station can feed back the second signal according to the first signal, so that the second station can obtain the channel information between the first station and the third station according to the second signal. In turn, the overall efficiency of sensing and communication is improved.

[0170] When the first signal is a signal after non-reference information is transmitted through the channel, not only the normal communication between the first station and the third station can be ensured, but also the second station can obtain the above-mentioned channel information. Therefore, the first station feeds back the second signal according to different feedback types, which can adapt to different application scenarios, and further improves the overall efficiency of sensing and communication.

[0171] The method provided by the embodiments of the present application can be divided into four stages: a negotiation stage, a signal transmission stage, a reporting stage (or a feedback stage) and an analysis stage (or a stage of determining channel information). The negotiation stage is used to determine at least one of the following: a resource for transmitting a first signal, a type of the first signal or a feedback type. The signal transmission stage is used for a third station to transmit a signal and for a first station to receive the first signal after the signal experiences a channel. The reporting stage is used to feed back a second signal. The analysis stage is used to determine channel information between the first station and the third station. The method provided by the embodiments of the present application is described below in combination with specific examples. The examples shown below are illustrated by taking the third station as the same as the second station, and the schemes in which the third station is different from the second station can refer to the description of FIG. 2 and the examples 1-6, which will not be described in detail below. The details of the content related to FIG. 2 but not described in detail can also refer to the examples 1-6 below.

[0172] Example 1,

[0173] (1) Negotiation stage:

[0174] The first station determines a feedback type.

[0175] The specific manner of determining the feedback type can refer to the above implementation modes 1-4, which will not be described here.

[0176] (2) Signal transmission stage:

[0177] The second station transmits a signal, and the first station receives the first signal. The first signal refers to the signal transmitted by the second station and reaching the first station after experiencing a channel between the first station and the second station.

[0178] (3) Reporting stage:

[0179] The first station transmits a second signal according to the feedback type.

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

[0181] (4) Analysis stage:

[0182] After the second station receives the second signal, the channel information between the first station and the second station is determined according to the feedback type.

[0183] The details of example 1 can refer to FIG. 2, which will not be described here.

[0184] Example 2,

[0185] (1) Negotiation stage:

[0186] The first station and the second station negotiate to perform sensing measurement on a signal on the resource occupied by the transmission DCI (i.e., the resource used for transmitting the transmission DCI).

[0187] Optionally, the first station and the second station can also negotiate the feedback type. For example, the feedback type is the second feedback type.

[0188] Optionally, in the case of performing sensing on the resource occupied by the transmission DCI (i.e., example 2), the feedback type can also be defined by the standard, for example, the second feedback type.

[0189] Optionally, the feedback type can also be determined by the first station according to the type of the first signal received by the first station. For example, the first station can correctly parse the first signal, for example, the first signal is the DCI sent by the second station to the first station, or the first signal is the reference information, and the first station can determine that the feedback type is the first feedback type. For example, the first station cannot correctly parse the first signal, for example, the first signal is not the DCI sent by the second station to the first station, and the first station can determine that the feedback type is the second feedback type. In the case where the feedback type is determined by the first station according to the type of the first signal, the second signal can also include information indicating the feedback type.

[0190] (2) Signal transmission phase:

[0191] The second station transmits a signal, and the first station receives a first signal. The first signal refers to the signal transmitted by the second station after experiencing the channel between the first station and the second station and reaching the first station.

[0192] The first signal can have the following types:

[0193] 1. The second station transmits a DCI to the first station on the resource occupied by the transmission DCI. That is, the first signal can be a DCI. The DCI can be a DCI sent by the second station to the first station, or can not be a DCI 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 according to the DCI, and the second signal includes the second information.

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

[0195] Generally, the resource allocated to the DCI is periodic. Therefore, in the resource for transmitting the DCI, there can be DCI transmission or no DCI transmission. When there is no DCI transmission in the resource for transmitting the DCI, the second station transmits non-DCI on the resource for transmitting the DCI, not only to achieve sensing, but also to avoid resource waste. For example, in the scenario where the transceiver needs to densely obtain channel information, by achieving sensing on the resource for transmitting the DCI, not only the resource utilization can be improved, but also sensing can be achieved, thereby improving the overall efficiency of communication and sensing.

[0196] Example 2 is illustrated by taking the control information as DCI. In the star flash communication system, the control information can also be information sent by the G station to one or more T stations in the domain.

[0197] (3) Reporting stage:

[0198] The first station transmits the second signal according to the feedback type. Optionally, the feedback type is the second feedback type, and the second signal includes the second information. Optionally, the feedback type is the first feedback type, and the second signal includes the first information.

[0199] (4) Analysis stage:

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

[0201] For details of Example 2, refer to FIG. 2, which will not be described here.

[0202] Example 3,

[0203] (1) Negotiation stage:

[0204] The first station and the second station negotiate to use the signal on the resource occupied by the transmission of the broadcast signal for sensing measurement. Generally, the format or content of the broadcast signal can be determined by the transceiver, so the broadcast signal can also be considered as reference information.

[0205] Optionally, the first station and the second station can also negotiate the feedback type. For example, the feedback type is the first feedback type or the second feedback type.

[0206] Optionally, in the scenario of using the resource occupied by the transmission of the broadcast signal for sensing (i.e. Example 3), the feedback type can also be defined by the standard, such as the second feedback type or the first feedback type.

[0207] Optionally, the feedback type can also be determined by the first station according to the type of the first signal received by the first station. For example, if the first signal is a broadcast signal, the feedback type can be the first feedback type. For another example, if the first signal is a non-broadcast signal, and the non-broadcast signal is reference information, the feedback type can be the first feedback type; if the non-broadcast signal is non-reference information, the feedback type can be the second feedback type. In the case where the feedback type is determined by the first station, the second signal can further comprise information indicating the feedback type.

[0208] (2) Signal transmission phase:

[0209] The second station transmits a signal, and the first station receives a first signal. The first signal is the signal transmitted by the second station after experiencing the channel between the first station and the second station and reaching the first station.

[0210] The first signal can have the following types:

[0211] 1. The second station transmits a broadcast signal to the first station on the resource occupied by the transmission of the broadcast signal. That is, the first signal is a broadcast signal.

[0212] 2. The second station transmits a non-broadcast signal to the first station on the resource occupied by the transmission of the broadcast signal. That is, the first signal is a non-broadcast signal. The non-broadcast signal can be reference information or non-reference information. If the non-broadcast signal is the signal after the transmission of the reference information through the channel, the feedback type can be the first feedback type. If the non-broadcast signal is the signal after the transmission of the non-reference information through the channel, the feedback type can be the second feedback type.

[0213] The resource description of Example 3 can refer to the description of Example 2, which will not be described in detail here.

[0214] (3) Reporting phase:

[0215] The first station transmits a second signal according to the feedback type. Optionally, if the feedback type is the first feedback type, the second signal comprises first information. If the feedback type is the second feedback type, the second signal comprises second information.

[0216] (4) Analysis phase:

[0217] After receiving the second signal, the second station determines the channel information between the first station and the second station according to the feedback type.

[0218] The details of Example 3 can refer to FIG. 2, which will not be described in detail here.

[0219] For Examples 2 and 3, control information (such as DCI) or broadcast signals can be used for perception measurement, so that resources for perception can not need to be allocated separately.

[0220] Example 4,

[0221] (1) negotiation phase:

[0222] The second station sends second indication information to the first station, the second indication information being used to indicate the resource for transmitting the first signal. Correspondingly, the first station receives the second indication information.

[0223] The second station sends third indication information to the first station, the third indication information being used to indicate whether the first signal is second reference information or non-reference information. Correspondingly, the first station receives the third indication information.

[0224] The description of the second indication information and the third indication information can refer to FIG. 2, which will not be described in detail here.

[0225] (2) signal transmission phase:

[0226] The second station sends the signal, and the first station receives the first signal. The first signal is the signal sent by the second station after experiencing the channel between the first station and the second station and reaching the first station.

[0227] (3) reporting phase:

[0228] If the first signal is the second reference information, the feedback type is the first feedback type or the second feedback type. If the first signal is the non-reference information, the feedback type is the second feedback type.

[0229] The first station sends the second signal according to the feedback type.

[0230] (4) analysis phase:

[0231] After receiving the second signal, the second station determines the channel information between the first station and the second station according to the feedback type.

[0232] The detailed content of Example 4 can refer to FIG. 2, which will not be described in detail here.

[0233] Example 5,

[0234] (1) negotiation phase:

[0235] The first station and the second station negotiate the resource for sensing measurement. For example, the resource for sensing measurement is the first resource.

[0236] The first station and the second station need to transmit non-reference information on the first resource (if there is a demand for downlink communication service), which can be used for communication and sensing. Therefore, the first station and the second station can interact the resource for transmitting non-reference information through signaling (such as the second indication information), for example, the resource for transmitting non-reference information can be the second resource.

[0237] Optionally, the first station determines the feedback type. The specific manner of determining the feedback type can refer to the above-mentioned implementation mode 1 to implementation mode 4, and will not be described here in detail.

[0238] (2) Signal transmission phase:

[0239] The second station transmits a signal, and the first station receives a first signal. The first signal refers to the signal transmitted by the second station after experiencing the channel between the first station and the second station and reaching the first station.

[0240] The first signal can have the following types:

[0241] 1. The first signal is second reference information. For example, the signal transmitted by the second station is a known signal to the first station, and the first signal is used for sensing.

[0242] 2. The first signal is non-reference information. For example, the first signal is a non-known signal to the first station, and the first signal can be used for sensing and communication. That is, the second station can occupy the second resource in the first resource, and the second resource can be used for communication and sensing.

[0243] (3) Reporting phase:

[0244] The first station transmits a second signal according to the feedback type. The second signal includes the first information or the second information. The second signal also includes information for indicating the feedback type.

[0245] For example, the feedback type can be determined by the first station. Optionally, the feedback type determined by the first station can be the second feedback type. Optionally, the first station can determine the feedback type according to the type of the first signal.

[0246] (4) Analysis phase:

[0247] After receiving the second signal, the second station determines the channel information between the first station and the second station according to the feedback type.

[0248] The details of example 5 can refer to FIG. 2, and will not be described here in detail.

[0249] The communication device provided by the embodiments of the present application will be introduced below.

[0250] The present application divides the functional modules of the communication device according to the above method embodiments. For example, each functional module can be divided according to each function, or two or more functions can be integrated into one processing module. The above integrated module can be realized in the form of hardware or in the form of a software functional module. It should be noted that the division of the modules in the present application is illustrative, and is only a logical functional division. In actual implementation, another division mode can be used. The communication device of the embodiments of the present application will be described in detail below with reference to FIGS. 6 to 8.

[0251] FIG. 6 is a structural schematic diagram of a communication device provided by an embodiment of the present application. As shown in FIG. 6, the communication device includes a processing module 601 and a transceiver module 602. The transceiver module 602 can realize corresponding communication functions, and the processing module 601 is configured to realize corresponding processing functions. The transceiver module 602 can also be referred to as an interface, a communication interface, or a communication module, etc.

[0252] In some embodiments of the present application, the communication device can be configured to perform the actions performed by the first station in the above method embodiments. At this time, the first station can be the device itself or a chip or a functional module configured in the device, etc. The transceiver module 602 is configured to perform the transceiving related operations of the first station in the above method embodiments, and the processing module 601 is configured to perform the processing related operations of the first station in the above method embodiments.

[0253] For example, the transceiver module 602 is configured to receive or input a first signal; the processing module 601 is configured to determine a feedback type; and the transceiver module 602 is further configured to send or output a second signal.

[0254] For example, the transceiver module 602 is further configured to receive or input first indication information.

[0255] For example, the transceiver module 602 is further configured to receive or input second indication information.

[0256] For example, the transceiver module 602 is further configured to receive or input third indication information.

[0257] The descriptions of the first signal, the feedback type, the second signal, the first indication information, the second indication information, or the third indication information can be referred to the above, which will not be described in detail here.

[0258] Referring to FIG. 6, in some other embodiments of the present application, the communication device can be configured to perform the actions performed by the second station in the above method embodiments. At this time, the second station can be the device itself or a chip or a functional module configured in the device, etc. The transceiver module 602 is configured to perform the transceiving related operations of the second station in the above method embodiments, and the processing module 601 is configured to perform the processing related operations of the second station in the above method embodiments.

[0259] The transceiver module 602 is configured to receive the second signal, and the processing module 601 is configured to determine the channel information according to the second signal.

[0260] The transceiver module 602 is further configured to send or output the first indication information.

[0261] The transceiver module 602 is further configured to send or output the second indication information.

[0262] The transceiver module 602 is further configured to send or output the third indication information.

[0263] The descriptions of the first signal, the feedback type, the second signal, the first indication information, the second indication information, or the third indication information can refer to the descriptions above, and will not be repeated here.

[0264] In some embodiments of the application, the communication apparatus can be configured to execute the actions performed by the third station in the method embodiments described above. The third station can be the apparatus itself or a chip or a functional module configured in the apparatus. The transceiver module 602 is configured to perform the transceiving related operations of the third station in the method embodiments described above, and the processing module 601 is configured to perform the processing related operations of the third station in the method embodiments described above.

[0265] The processing module 601 is configured to determine the signal type, and the transceiver module 602 is configured to send the signal.

[0266] The transceiver module 602 is further configured to send or output the first indication information.

[0267] The transceiver module 602 is further configured to send or output the second indication information.

[0268] The transceiver module 602 is further configured to send or output the third indication information.

[0269] The descriptions of the first signal, the feedback type, the second signal, the first indication information, the second indication information, or the third indication information can refer to the descriptions above, and will not be repeated here.

[0270] For example, the transceiver module 602 can be an antenna module. For another example, the transceiver module 602 can be an input / output module. Optionally, the communication apparatus can further include a storage module, which can be configured to store instructions and / or data. The processing module 601 can read the instructions and / or data in the storage module, so that the communication apparatus can implement the method embodiments described above.

[0271] The specific descriptions of the transceiver module and the processing module in each of the above embodiments are only examples. For the specific functions or executed steps of the transceiver module and the processing module, refer to the above method embodiments, which will not be described in detail here.

[0272] It can be understood that the division of the modules in the above apparatus is only a logical function division. One function module can correspond to each function, or two or more functions can be integrated into one function module. In actual implementation, all or part of the modules can be integrated into one physical entity, or can be distributed on different physical entities. In addition, the function modules can be implemented in the form of hardware, software, or a combination of hardware and software.

[0273] In one example, the functional units in any of the above apparatuses can 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 the integrated circuit forms.

[0274] The communication apparatus of the embodiments of the present application is introduced above, and possible product forms of the communication apparatus are introduced below. Any product form that has the functions of the communication apparatus described in FIG. 6 falls within the protection scope of the embodiments of the present application. The following introduction is only an example, and the product form of the communication apparatus of the embodiments of the present application is not limited to this.

[0275] In a possible implementation, in the communication apparatus shown in FIG. 6, 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 sending module and a receiving module, the sending module can be a transmitter, and the receiving module can be a receiver, and the sending module and the receiving module are integrated in one device, for example, a transceiver. In the embodiment of the present application, the processor and the transceiver can be coupled, and the connection manner between the processor and the transceiver is not limited in the embodiment of the present application. In the process of executing the above method, the process about sending information in the above method can be the process that the processor outputs the above information. When the above information is output, the processor outputs the above information to the transceiver, so as to be transmitted by the transceiver. After the above information is output by the processor, the above information can also need to be processed further, and then reaches the transceiver. Similarly, the process about receiving information in the above method can be the process that the processor receives the input above information. When the processor receives the input information, the transceiver receives the above information and inputs the processor. Further, after the transceiver receives the above information, the above information can need to be processed further, and then inputs the processor.

[0276] FIG. 7 is another structural schematic diagram of the communication apparatus provided by the embodiment of the present application. As shown in FIG. 7, the communication apparatus 70 includes one or more processors 720 and a transceiver 710.

[0277] In some embodiments of the present application, the communication apparatus can be used to execute the steps or methods or functions executed by the first station, for example, the processor 720 can be used to execute the functions or steps implemented by the processing module 601 shown in FIG. 6, and the transceiver 710 can be used to execute the functions or steps implemented by the transceiver module 602 shown in FIG. 6. The specific description of the processor 720 and the transceiver 710 can refer to FIG. 6 or the method embodiments shown above, and will not be described in detail here.

[0278] In some embodiments of the present application, the communication apparatus can be used to execute the steps or methods or functions executed by the first station, for example, the processor 720 can be used to execute the functions or steps implemented by the processing module 601 shown in FIG. 6, and the transceiver 710 can be used to execute the functions or steps implemented by the transceiver module 602 shown in FIG. 6. The specific description of the processor 720 and the transceiver 710 can refer to FIG. 6 or the method embodiments shown above, and will not be described in detail here.

[0279] In some embodiments of the application, the communication device is configured to perform the steps or methods or functions performed by the third station, e.g., the processor 720 can be configured to perform the functions or steps implemented by the processing module 601 as shown in FIG. 6, and the transceiver 710 can be configured to perform the functions or steps implemented by the transceiving module 602 as shown in FIG. 6. For details of the processor 720 and the transceiver 710, reference can be made to the method embodiments shown in FIG. 6 or described above, and thus no further elaboration is provided here.

[0280] In various implementations of the communication device shown in FIG. 7, the transceiver can include a receiver configured to perform the functions (or operations) of receiving and a transmitter configured to perform the functions (or operations) of transmitting. The transceiver is configured to communicate with other devices / apparatuses via a transmission medium.

[0281] Optionally, the communication device 70 can further include one or more memories 730 configured to store program instructions and / or data. The memory 730 is coupled to the processor 720. The coupling between the communication device, units or modules in the embodiments of the application is indirect coupling or communication connection between the communication device, units or modules, which can be electrical, mechanical or other forms, for information interaction between the communication device, units or modules. The processor 720 can operate in cooperation with the memory 730. The processor 720 can execute the program instructions stored in the memory 730. Optionally, at least one of the one or more memories can be included in the processor.

[0282] The specific connection medium between the transceiver 710, the processor 720 and the memory 730 in the embodiments of the application is not limited. In FIG. 7, the memory 730, the processor 720 and the transceiver 710 are connected by a bus 740, which is represented by a thick line in FIG. 7. The connection mode between other components is only schematically illustrated and is not limited. The bus can be divided into an address bus, a data bus, a control bus, etc. For convenience of representation, only one thick line is used in FIG. 7, but it does not mean that there is only one bus or only one type of bus.

[0283] In the embodiments of the application, the processor can be a general processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array or other programmable logic device, a discrete gate or transistor logic device, a discrete hardware component, etc., which can implement or execute the disclosed methods, steps and logic block diagrams in the embodiments of the application. The general processor can be a microprocessor or any conventional processor, etc. The steps of the methods disclosed in conjunction with the embodiments of the application can be directly embodied as hardware processor execution or executed by a combination of hardware and software modules in the processor, etc.

[0284] The memory in the embodiments of the present application can include, but is not limited to, a non-volatile memory such as a hard disk drive (HDD) or a solid-state drive (SSD), a random access memory (RAM), an erasable programmable ROM (EPROM), a read-only memory (ROM), a compact disc read-only memory (CD-ROM), and the like. The memory is any storage medium that can be used to carry or store program codes in the form of instructions or data structures and can be read and / or written by a computer (such as the communication device shown in the present application and the like). The memory in the embodiments of the present application can also be a circuit or any other device capable of realizing a storage function, used for storing program instructions and / or data.

[0285] The processor 720 is mainly used for processing communication protocols and communication data, controlling the whole communication device, executing software programs, and processing data of the software programs. The memory 730 is mainly used for storing software programs and data. The transceiver 710 can include a control circuit and an antenna, and the control circuit is mainly used for converting baseband signals and radio frequency signals and processing the radio frequency signals. The antenna is mainly used for receiving and transmitting radio frequency signals in the form of electromagnetic waves. The input and output device, such as a touch screen, a display screen, a keyboard, and the like, is mainly used for receiving user input data and outputting data to the user.

[0286] 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 circuit. The radio frequency circuit converts the baseband signal into a radio frequency signal, and transmits the radio frequency signal in the form of electromagnetic waves through the antenna. When data is transmitted to the communication device, the radio frequency circuit receives the radio frequency signal through the antenna, converts the radio frequency signal into a baseband signal, and outputs the baseband signal to the processor 720. The processor 720 converts the baseband signal into data and processes the data.

[0287] In another implementation, the radio frequency circuit and the antenna can be arranged independently of the processor performing baseband processing, for example, in a distributed scenario, the radio frequency circuit and the antenna can be arranged remotely from the communication device.

[0288] The communication apparatus shown in the embodiments of the present application can also have more components than those shown in FIG. 7, and the embodiments of the present application do not limit this. The method performed by the processor and the transceiver shown above is only an example, and the steps specifically performed by the processor and the transceiver can refer to the method described above. The dashed part in FIG. 7 represents an option.

[0289] In another possible implementation, in the communication apparatus shown in FIG. 6, the processing module 601 can be one or more logic circuits, and the transceiving module 602 can be an input / output interface, also referred to as a communication interface, or an interface circuit, or an interface, etc. Alternatively, the transceiving module 602 can also be a sending module and a receiving module, the sending module can be an output interface, and the receiving module can be an input interface, and the sending module and the receiving module are integrated into one module, for example, an input / output interface.

[0290] FIG. 8 is another structural schematic diagram of a communication apparatus provided by the embodiments of the present application. As shown in FIG. 8, the communication apparatus shown in FIG. 8 includes a logic circuit 801 and an interface 802. That is, the processing module 601 can be implemented by the logic circuit 801, and the transceiving module 602 can be implemented by the interface 802. The logic circuit 801 can be a chip, a processing circuit, an integrated circuit, or a system on chip (SoC) chip, etc., and the interface 802 can be a communication interface, an input / output interface, a pin, etc. For example, FIG. 8 is shown by taking the communication apparatus as a chip, and the chip includes the logic circuit 801 and the interface 802.

[0291] In the embodiments of the present application, the logic circuit and the interface can also be coupled to each other. The embodiments of the present application do not limit the specific connection mode of the logic circuit and the interface. For example, the logic circuit 801 can be used to perform the functions or steps implemented by the processing module 601 shown in FIG. 6, and the interface 802 can be used to perform the functions or steps implemented by the transceiving module 602 shown in FIG. 6. For specific descriptions of the logic circuit 801 and the interface 802, refer to the method embodiments shown in FIG. 6 or the above description, which will not be described in detail here.

[0292] The communication apparatus shown in the embodiments of the present application can implement the method provided by the embodiments of the present application in the form of hardware, or implement the method provided by the embodiments of the present application in the form of software, etc., and the embodiments of the present application do not limit this.

[0293] In addition, the embodiments of the present application also provide a communication system, which includes a first station and a second station, and the first station and the second station can be used to perform the method in any of the preceding embodiments. Alternatively, in the case that the second station is different from the third station, the communication system can include the first station, the second station, and the third station. Alternatively, the communication system includes the first station and the third station.

[0294] The application further provides a computer program for implementing the operations and / or processes performed by each station in the method provided by the application.

[0295] The application further provides a computer readable storage medium having computer code stored therein, which, when executed on a computer, causes the computer to perform the operations and / or processes performed by each communication device in the method provided by the application.

[0296] The application further provides a computer program product comprising computer code or a computer program, which, when executed on a computer, causes the operations and / or processes performed by each station in the method provided by the application to be performed.

[0297] In several embodiments provided by the application, it should be understood that the disclosed system, communication device and method can be implemented in other manners. For example, the embodiments of the communication device described above are merely schematic; for example, the division of the modules is merely a logical function division; an actual implementation can be a different division manner; for example, a plurality of modules or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the displayed or discussed mutual couplings or direct couplings or communication connections between different modules can be indirect couplings or communication connections through some interfaces, communication devices or modules, and can be electric, mechanical or in other forms.

[0298] The modules illustrated as separate components can or can not be physically separate, and the components illustrated as modules can or can not be physical modules, i.e., can be located in one place or can be distributed to multiple network modules. Part or all of the modules can be selected according to actual needs to achieve the technical effects of the scheme provided by the embodiments of the application.

[0299] In addition, each functional module in each embodiment of the application can be integrated into a processing module, or each module can exist physically, or two or more modules can be integrated into one module. The integrated module can be implemented in the form of hardware or in the form of a software functional module.

[0300] The integrated module, if implemented in the form of a software function module and sold or used as an independent product, can be stored in a computer readable storage medium. Based on such understanding, the technical solutions of the present application essentially or say the part that contributes to the prior art, or the whole or part of the technical solutions can be embodied in the form of a software product. The computer software product is stored in a readable storage medium, includes a plurality of instructions to make a computer device (which can be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the method described in various embodiments of the present application. The aforementioned readable storage medium includes: a U disk, a mobile hard disk, a read-only memory (read-only memory, ROM), a random access memory (random access memory, RAM), a magnetic disk or an optical disk, and various media that can store program codes.

Claims

1. An information feedback method, characterized by, The method comprises: The first station receives a first signal, which is a signal transmitted by a third station after channel transmission; The first station transmits a second signal to a second station according to a feedback type, wherein the second signal is used by the second station to determine channel information between the first station and the third station; and In a case where the feedback type is a first feedback type, the second signal comprises first information, which is channel information determined according to the first signal and first reference information; or In a case where the feedback type is a second feedback type, the second signal comprises second information, which is information determined according to the first signal, and the second information is different from the first information.

2. The method of claim 1, wherein, The second information is information determined according to the first signal and not according to the first reference information. The feedback type is determined by negotiation between the first station and the second station, or the feedback type is determined by the first station, or the feedback type is defined by a standard.

3. The method according to claim 1 or 2, characterized in that, The method further comprises:

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

5. The method of claim 4, wherein, The radio frame is a sensing measurement request frame or a sensing measurement response frame.

6. The method of claim 5, wherein, The second signal further comprises information used to indicate the feedback type.

7. The method of claim 1 or 2, wherein, The feedback type is determined by a resource for transmitting the first signal.

8. The method of claim 1 or 2, wherein, If the resource for transmitting the first signal is contained in a resource for transmitting control information, the feedback type is the second feedback type.

9. The method according to claim 1 or 2 or 8, characterized in that, The first signal is used to carry the control information, or the first signal is used to carry non-control information.

10. The method of claim 9, wherein, If the resource for transmitting the first signal is contained in a resource for transmitting a broadcast signal, the feedback type is the first feedback type or the second feedback type.

11. The method of claim 1 or 2 or 8, wherein, The first signal is used to carry a broadcast signal, or the first signal is used to carry a non-broadcast signal.

12. The method of claim 11, wherein, If the resource for transmitting the first signal is a second resource in a first resource, the feedback type is the second feedback type; or 13. The method of claim 1 or 2 or 8, wherein, If the resource for transmitting the first signal is a resource other than the second resource in the first resource, the feedback type is the first feedback type. The first resource is a resource for sensing, and the second resource is a resource for communication and sensing in the first resource.

14. The method of claim 13, wherein, The method further comprises:

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

16. The method according to any one of claims 1 to 15, characterized in that, The first station receives third indication information, which is further used to indicate whether the first signal is second reference information or non-reference information. If the first signal is second reference information, the feedback type is the first feedback type or the second feedback type; or 17. The method of claim 1 or 2 or 15 or 16, wherein, ​ If the first signal is non-reference information, the feedback type is the second feedback type.

18. An information feedback method characterized by, The method comprises: The second station receives a second signal, the second signal being used by the second station to determine channel information between the first station and a third station; The second station determines the channel information according to the second signal; wherein, If the feedback type is a first feedback type, the second signal comprises first information, the first information being channel information determined according to a first signal and first reference information; or, If the feedback type is a second feedback type, the second signal comprises second information, the second information being information determined according to the first signal, and the second information being different from the first information.

19. The method of claim 18, wherein, The second information being information determined according to the first signal comprises: The second information being information determined according to the first signal and not according to the first reference information.

20. The method of claim 18 or 19, wherein, The feedback type is determined by negotiation between the first station and the second station, or the feedback type is determined by the first station, or the feedback type is defined by a standard.

21. The method of claim 20, wherein, The method further comprises: The second station sends first indication information, the first indication information being used to indicate the feedback type.

22. The method of claim 21, wherein, 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 high-layer signaling.

23. The method of claim 22, wherein, The radio frame is a sensing measurement request frame or a sensing measurement response frame.

24. The method of claim 18 or 19, wherein, The second signal further comprises information used to indicate the feedback type.

25. The method of claim 18 or 19, wherein, The feedback type is determined by a resource for transmitting the first signal.

26. The method of claim 18 or 19 or 25, wherein, If the resource for transmitting the first signal is contained in a resource for transmitting control information, the feedback type is the second feedback type.

27. The method of claim 26, wherein, The first signal is used to carry the control information, or the first signal is used to carry non-control information.

28. The method of claim 18 or 19 or 25, wherein, If the resource for transmitting the first signal is contained in a resource for transmitting a broadcast signal, the feedback type is the first feedback type or the second feedback type.

29. The method of claim 28, wherein, 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 of claim 18 or 19 or 25, wherein, If the resource for transmitting the first signal is a second resource in a first resource, the feedback type is the second feedback type; or, If the resource for transmitting the first signal is a resource other than the second resource in the first resource, the feedback type is the first feedback type.

31. The method of claim 30, wherein, The first resource is a resource for sensing, and the second resource is a resource for communication and sensing in the first resource.

32. The method of any one of claims 18-31, wherein, The method further comprises: The first station sends second indication information, the second indication information being used to indicate a resource for transmitting the first signal.

33. The method of any one of claims 18-32, wherein, The method further comprises: The second station sends third indication information, the third indication information being further used to indicate that the first signal is second reference information or non-reference information.

34. The method of claim 18 or 19 or 32 or 33, wherein, If the first signal is second reference information, the feedback type is 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.

35. A communications device, characterized by comprising means for performing the method of any of claims 1-34.

36. A computer-readable storage medium, characterized in that, The computer readable storage medium is for storing a computer program which, when executed by a computer, causes the method of any of claims 1-34 to be performed.

37. A computer program product, characterised in that, The computer program product, when executed by a computer, causes the method of any of claims 1-34 to be performed.

38. A communication system, characterized by comprising a first station for performing the method of any of claims 1-17 and a second station for performing the method of any of claims 18-34.

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