Information transmission method, apparatus, and system

Abstract

The present application relates to an information transmission method, an apparatus, and a system. A first apparatus receives a first reference signal from a second apparatus. The first apparatus sends first information, the first information being obtained by correcting the measurement result of the first reference signal on the basis of a first phase. The first phase is a phase determined on the basis of a first path and the measurement result of the first reference signal, or is a phase determined on the basis of the measurement result of a third reference signal. The first path is a path between the first apparatus and the second apparatus, and the third reference signal is a reference signal for phase correction. By correcting the measurement result of the first reference signal on the basis of the first phase, the phase deviation caused by device factors in the measurement result of the first reference signal can be removed as much as possible, so that the first information obtained after correction only comprise environmental information as much as possible but does not comprise the phase deviation caused by device factors, and the environmental information determined on the basis of the first information is accurate.

Description

Information transmission method, device and system

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to the Chinese patent application filed with the State Intellectual Property Office of the People's Republic of China on December 25, 2023, with application number 202311798747.1 and application name "A method, device and system for information transmission", the entire contents of which are incorporated by reference into this application. Technical Field

[0003] The present application relates to the field of communication technology, and in particular to an information transmission method, device and system. Background Art

[0004] Wireless sensing is an important technology for the future. In wireless sensing, a transmitting device can send signals to the surrounding environment, and a receiving device can correspondingly receive signals reflected by the environment. By comparing and analyzing the correlation between the received and transmitted signals, the transceiver can determine relevant information about the surrounding environment. For example, bistatic sensing is a relatively important sensing mode in wireless sensing. In bistatic sensing, the surrounding environment can usually be perceived by having one device send a signal and another device receive the signal. Specifically, the receiving device measures the received signal to obtain a channel measurement result. This channel measurement result is closely related to the surrounding environment. For example, the position of objects in the environment and the movement of objects (including linear motion or periodic vibrations such as breathing and heartbeat) will affect the channel measurement result. Therefore, the channel measurement result can reflect environmental information.

[0005] However, the channel measurement results obtained by the receiving device generally include not only environmental information, but also the influence of equipment factors. Specifically, the channel measurement results obtained by the receiving device are generally equivalent baseband measurement results. Therefore, when the RF device of the device has some non-ideal factors, the baseband measurement results will include both environmental information and the influence of the RF device. For example, when the carrier frequencies of the transceiver devices are inconsistent, the baseband measurement results may include phase deviations caused by carrier frequency deviations; for example, when the crystal oscillator of the transceiver device is non-ideal, the baseband measurement results may include additional phase noise, etc. It can be seen that the channel measurement results obtained by the receiving device include not only environmental information, but also interference information caused by equipment factors. Therefore, the accuracy of the environmental information determined based on the channel measurement results is low, or it can be understood that the accuracy of the perception results is low.

[0006] Summary of the Invention

[0007] The embodiments of the present application provide an information transmission method, device, and system for improving the accuracy of perception results.

[0008] In a first aspect, an information transmission method is provided, which can be performed by a first device. The first device can implement one or more of the functions of perception, positioning or communication. The first device is, for example, a terminal device, or other devices including the functions of a terminal device, or a chip system (or, chip) or other functional modules, which can implement the functions of the terminal device, and the chip system or functional module is, for example, set in the terminal device. Alternatively, the first device is, for example, a network device, or other devices including the functions of a network device, or a chip system (or, chip) or other functional modules, which can implement the functions of the network device, and the chip system or functional module is, for example, set in the network device. Optionally, the network device is an access network device or a core network device. The method includes: receiving a first reference signal from a second device; and sending first information, wherein the first information is obtained by correcting a measurement result of the first reference signal according to a first phase, wherein the first phase is a phase determined according to a measurement result of a first path and the first reference signal, or the first phase is a phase determined according to a measurement result of a third reference signal, wherein the first path is one of one or more paths between the first device and the second device, and the third reference signal is a reference signal used for phase correction.

[0009] In an embodiment of the present application, the measurement result of the first reference signal can be corrected according to the first phase. The first phase can be the phase of the first path, or the phase determined according to the reference signal used for phase correction. For example, the first phase can reflect the phase deviation caused by equipment factors. By correcting the measurement result of the first reference signal according to the first phase, the phase deviation caused by equipment factors in the measurement result of the first reference signal can be removed as much as possible, so that the first information obtained after correction only includes environmental information as much as possible without including the phase deviation caused by equipment factors. In this way, the environmental information determined based on the first information is more accurate.

[0010] In an optional embodiment, the first information includes one or more of the following: a first channel coefficient, phase information of the one or more paths, Doppler frequency information of the one or more paths, first Doppler spectrum information, or first autocorrelation function information. Alternatively, the first information may also include other information, which is not limited to this. By using the first information, for example, the first information removes phase deviations caused by device factors, so that the environmental information determined by the device receiving the first information based on the first information can be more accurate.

[0011] In an optional embodiment, the method further includes: determining the initial channel coefficient H according to the measurement result of the first reference signal on the sub-time unit n n And the first phase is θ n ; Determine the first channel coefficient as: If the first information includes the first channel coefficient and does not include other information, and the first device does not further process the first channel coefficient (e.g., compression), the first device can directly send the first channel coefficient after determining the first channel coefficient, without having to perform the step of determining the first information based on the first channel coefficient. In this embodiment of the present application, the first device can process each time unit or sub-time unit occupied by the first reference signal separately, so that the processing result can cover the time domain resources occupied by the first reference signal, with finer granularity.

[0012] In an optional embodiment, the phase information of the one or more paths is used to indicate: the phase of each of the one or more paths, or the phase difference between the initial phase of each of the one or more paths and the first phase. That is, the phase information of a path can directly indicate the phase of the path (in this case, the phase corrected according to the first phase), making the indication more clear; or the phase information of a path can also indicate the phase difference between the initial phase of the path and the first phase. The bits required to indicate the phase difference are generally fewer than the bits required to indicate the phase, thus saving transmission overhead.

[0013] In an optional embodiment, the first phase is a phase determined according to the first path, wherein the first phase is a phase determined according to a channel coefficient measured after receiving the first reference signal through the first path; or, the first phase is a phase determined according to a channel coefficient of a reference frequency unit measured after receiving the first reference signal through the first path; or, the first phase is a phase determined according to a channel coefficient measured after receiving the first reference signal through the first path and through a reference antenna port and / or a first reference signal port; or, the first phase is a phase determined according to a channel coefficient on a reference frequency unit measured after receiving the first reference signal through the first path and through a reference antenna port and / or a first reference signal port. The first phase may be associated with different parameters, such as one or more of a reference subcarrier, a reference antenna port, or a first reference signal port, or in addition thereto, the first phase may be associated with other parameters, without limitation.

[0014] In an optional embodiment, the first path is a path with the smallest delay among the one or more paths. For example, the first path is a path that is received first in time. This method of determining the first path is relatively simple.

[0015] In an optional embodiment, the first path is the LoS path between the first and second devices. When a LoS path exists between the first and second devices and both are stationary, the phase of the LoS path remains unchanged. Furthermore, since the LoS path itself has a high signal strength and the extracted phase is more accurate, selecting the LoS path as the first path results in better correction results.

[0016] In an optional embodiment, the method further includes: receiving first indication information; wherein the first indication information includes one or more of the following: first delay information, the first delay information is used to indicate the delay of the first path; the index of the first path; or, first precoding vector information or first precoding matrix information, the first precoding vector information or the first precoding matrix information corresponds to the first path. In the embodiment of the present application, the first device can determine the first path based on the measurement result of the first reference signal. Alternatively, the first device can also determine the first path based on the first indication information from other devices, without having to determine the first path by itself, which can simplify the implementation of the first device. For example, if the first device is a device with weaker capabilities, it can determine the first path with the help of the first indication information, so that the solution of the embodiment of the present application can cover more types of devices.

[0017] In an optional embodiment, before receiving the first indication information, the method further includes: receiving a second reference signal from the second device; sending a first measurement result, where the first measurement result is a measurement result of the second reference signal, and the first measurement result includes one or more of the following: at least one second channel coefficient, at least one first delay power spectrum, at least one first precoding matrix indicator PMI, or path information of N paths, where the N paths are all or part of the paths between the first device and the second device, and N is a positive integer. For example, if the first device wants to determine the first path with the help of the first indication information, the first device can first measure the second reference signal, so that other devices can determine the first path based on the measurement result of the second reference signal and then indicate it to the first device. Alternatively, if other devices can use other methods to determine the first path, the first device does not need to measure the second reference signal.

[0018] In an optional embodiment, the N paths include a second path, and the path information of the second path includes one or more of the following: an index of the second path, an identifier of the second path, delay information corresponding to the second path, AoA information of the second path, AoD information of the second path, or LoS path information of the second path. The LoS path information of the second path is used to indicate whether the second path is a LoS path and / or to indicate the probability that the second path is a LoS path. In addition to these parameters, the path information of a path may also include other parameters, or may include other parameters instead of the above parameters, without limitation.

[0019] In an optional embodiment, the method further includes: receiving the third reference signal from the second device, wherein the time domain resources occupied by the first reference signal and the third reference signal overlap. The first phase can be determined based on the measurement result of the third reference signal, for example, the third reference signal can be used for phase correction. Since the additional phase deviation caused by the influence of the equipment may be different in different sub-time units, if the third reference signal is to be used to determine the first phase and correct the measurement result of the first reference signal, the first reference signal resource and the third reference signal resource can be configured on the same sub-time unit to improve the accuracy of the first phase. Therefore, the embodiment of the present application can make the time domain resources occupied by the first reference signal resource and the time domain resources occupied by the third reference signal resource overlap,

[0020] In an optional embodiment, the method further includes: receiving the third reference signal from the second apparatus, wherein time domain resources occupied by the first reference signal and the third reference signal completely overlap. When the time domain resources occupied by the first reference signal and the third reference signal completely overlap, the obtained first phase can be more accurate.

[0021] In an optional embodiment, the type D quasi-co-site QCL source of the resource used to transmit the first reference signal is different from the type D quasi-co-site QCL source of the resource used to transmit the third reference signal. Type D quasi-co-site is generally used to describe that the receiving end can use the same or similar receiving beams for reception when receiving on two reference signal resources (or two channels, or one reference signal resource and one channel). In an embodiment of the present application, different transmit beams can be configured for the first reference signal resource and the third reference signal resource, and / or different receive beams can be configured. Therefore, the type D quasi-co-site source of the first reference signal resource and the type D QCL source of the third reference signal resource are different.

[0022] In an optional embodiment, the method further includes: receiving second indication information, wherein the second indication information indicates that the resources used to transmit the first reference signal are associated with the resources used to transmit the third reference signal, or indicates that the first information is obtained by performing phase correction based on the measurement result of the third reference signal.

[0023] In an optional embodiment, the resources used to transmit the first reference signal are associated with the resources used to transmit the third reference signal, including: the first information is obtained by performing phase correction based on the measurement result of the third reference signal, or it can also be understood that the measurement result of the third reference signal is used to perform phase correction on the measurement result of the first reference signal.

[0024] If the first device determines that the first reference signal resource and the second reference signal resource are associated, phase correction may be performed on the measurement result of the first reference signal based on the measurement result of the third reference signal, for example, phase correction may be performed on the measurement result of the first reference signal based on the first phase. Alternatively, the second indication information may not indicate that the first reference signal resource and the third reference signal resource are associated, but may directly indicate that phase correction is performed on the measurement result of the first reference signal based on the measurement result of the third reference signal.

[0025] In an optional embodiment, the method further includes: receiving third indication information, where the third indication information is used to indicate one or more of the following: a transmit beam associated with the first reference signal resource, a receive beam associated with the first reference signal resource, a transmit beam associated with the third reference signal resource, or a receive beam associated with the third reference signal resource. The first apparatus may transmit or receive the first reference signal and / or the third reference signal according to the beam indicated by the third indication information.

[0026] In an optional embodiment, the first phase is a phase determined according to the measurement result of the third reference signal, wherein the first phase is a phase determined according to the channel coefficient measured after receiving the third reference signal; or, the first phase is a phase determined according to the channel coefficient on the reference frequency unit measured after receiving the third reference signal; or, the first phase is a phase determined according to the channel coefficient measured after receiving the third reference signal through the reference antenna port and / or the first reference signal port; the first phase is a phase determined according to the channel coefficient on the reference frequency unit measured after receiving the third reference signal through the reference antenna port and / or the first reference signal port.

[0027] On the second aspect, another information transmission method is provided, which can be performed by a third device. The third device can implement one or more of the sensing, positioning or communication functions. The third device is, for example, a terminal device, or other devices including the functions of a terminal device, or a chip system (or, chip) or other functional module, which can implement the functions of the terminal device, and the chip system or functional module is, for example, set in the terminal device. Alternatively, the third device is, for example, a network device, or other devices including the functions of a network device, or a chip system (or, chip) or other functional module, which can implement the functions of a network device, and the chip system or functional module is, for example, set in the network device. Optionally, the network device is an access network device or a core network device. Among them, the third device is, for example, the second device, or other devices other than the first device and the second device, and the second device is a device that sends a reference signal to the first device. The method includes: sending first request information to a first device, the first request information instructing the first device to receive and measure a first reference signal, and instructing the second device to report first information, wherein the first information is obtained by correcting the measurement result of the first reference signal according to a first phase, the first phase is a phase determined according to the measurement result of the first path and the first reference signal, or the first phase is a phase determined according to the measurement result of a third reference signal, the first path is one of one or more paths between the first device and the second device, and the third reference signal is a reference signal used for phase correction.

[0028] In an optional embodiment, the first information includes one or more of the following: a first channel coefficient, phase information of the one or more paths, Doppler frequency information of the one or more paths, first Doppler spectrum information, or first autocorrelation function information.

[0029] In an optional implementation, the first path is a path with the smallest delay among the one or more paths.

[0030] In an optional embodiment, the first path is a LoS path between the first device and the second device.

[0031] In an optional embodiment, the method further includes: sending first indication information to the first device, the first indication information including one or more of the following: first delay information, the first delay information being used to indicate the delay of the first path; an index of the first path; or, first precoding vector information or first precoding matrix information, the first precoding vector information or the first precoding matrix information corresponding to the first path.

[0032] In an optional embodiment, the method further includes: sending a second reference signal to the first device; receiving a first measurement result from the first device, the first measurement result being the measurement result of the second reference signal; the first measurement result including one or more of the following: at least one second channel coefficient, at least one first delay power spectrum, at least one first PMI, or path information of N paths, the N paths being all or part of the path between the first device and the second device, and N being a positive integer.

[0033] In an optional embodiment, the N paths include a second path, and the path information of the second path includes one or more of the following: an index of the second path, an identifier of the second path, delay information corresponding to the second path, AoA information of the second path, AoD information of the second path, or LoS path information of the second path, wherein the LoS path information of the second path indicates whether the second path is a LoS path and / or indicates a probability that the second path is a LoS path.

[0034] In an optional implementation manner, time domain resources occupied by the first reference signal and the third reference signal overlap.

[0035] In an optional implementation manner, time domain resources occupied by the first reference signal and the third reference signal completely overlap.

[0036] In an optional implementation manner, a Type D quasi-co-located source of resources used to transmit the first reference signal and a Type D quasi-co-located source of resources used to transmit the third reference signal are different.

[0037] In an optional embodiment, the method further includes: sending second indication information to the first device, wherein the second indication information indicates that the resources used to transmit the first reference signal are associated with the resources used to transmit the third reference signal, or indicates that the first information is obtained by performing phase correction based on the measurement result of the third reference signal.

[0038] In an optional embodiment, the resources used to transmit the first reference signal are associated with the resources used to transmit the third reference signal, including: the first information is obtained by performing phase correction based on the measurement result of the third reference signal, or it can also be understood that the measurement result of the third reference signal is used to perform phase correction on the measurement result of the first reference signal.

[0039] In an optional embodiment, the method further includes: sending third indication information to the first device, wherein the third indication information is used to indicate one or more of the following: the transmitting beam associated with the first reference signal resource, the receiving beam associated with the first reference signal resource, the transmitting beam associated with the third reference signal resource, or the receiving beam associated with the third reference signal resource.

[0040] In an optional implementation, the method further includes: sending third request information to the second apparatus, where the third request information is used to instruct the second apparatus to send the first reference signal.

[0041] In an optional implementation, the third request information is further used to instruct the second apparatus to send the third reference signal.

[0042] Regarding the technical effects brought about by the second aspect or various optional implementations, reference may be made to the introduction to the technical effects of the first aspect or corresponding implementations.

[0043] In a third aspect, a device is provided. The device may be the first device described in any one of the first to second aspects above. The device has the functions of the first device above. The device is, for example, a terminal device, or other device including the functions of a terminal device, or a chip system (or chip) or other functional module, the chip system or functional module can implement the functions of the terminal device, and the chip system or functional module is, for example, set in the terminal device. Alternatively, the device is, for example, a network device, or other device including the functions of a network device, or a chip system (or chip) or other functional module, the chip system or functional module can implement the functions of a network device, and the chip system or functional module is, for example, set in the network device. In an optional implementation, the device includes a baseband device and a radio frequency device. In another optional implementation, the device includes a processing unit (sometimes also referred to as a processing module) and a transceiver unit (sometimes also referred to as a transceiver module). The transceiver unit can implement a sending function and a receiving function. When the transceiver unit implements the sending function, it can be called a sending unit (sometimes also referred to as a sending module), and when the transceiver unit implements the receiving function, it can be called a receiving unit (sometimes also referred to as a receiving module). The sending unit and the receiving unit can be the same functional module, which is called a transceiver unit, and the functional module can realize the sending function and the receiving function; or the sending unit and the receiving unit can be different functional modules, and the transceiver unit is a general term for these functional modules.

[0044] In an optional embodiment, the transceiver unit (or, the receiving unit) is used to receive a first reference signal from a second device; the transceiver unit (or, the sending unit) is used to send first information, where the first information is obtained by correcting the measurement result of the first reference signal according to a first phase, the first phase is a phase determined according to the measurement result of the first path and the first reference signal, or the first phase is a phase determined according to the measurement result of a third reference signal, the first path is one of one or more paths between the first device and the second device, and the third reference signal is a reference signal for phase correction.

[0045] In an optional embodiment, the device also includes a storage unit (sometimes also referred to as a storage module), and the processing unit is used to couple with the storage unit and execute the program or instructions in the storage unit, so that the device can perform the function of the first device described in any one of the first to second aspects above.

[0046] In a fourth aspect, a device is provided. The device may be the third device described in any one of the first to second aspects above. The device has the functions of the third device above. The device is, for example, a terminal device, or other device including the functions of a terminal device, or a chip system (or, chip) or other functional module, and the chip system or functional module can realize the functions of the terminal device, and the chip system or functional module is, for example, set in the terminal device. Alternatively, the device is, for example, a network device, or other device including the functions of a network device, or a chip system (or, chip) or other functional module, and the chip system or functional module can realize the functions of the network device, and the chip system or functional module is, for example, set in the network device. In an optional implementation, the device includes a baseband device and a radio frequency device. In another optional implementation, the device includes a processing unit (sometimes also referred to as a processing module) and a transceiver unit (sometimes also referred to as a transceiver module). For the implementation of the transceiver unit, reference can be made to the introduction of the third aspect.

[0047] In an optional embodiment, the transceiver unit (or, the sending unit) is used to send first request information to the first device, where the first request information instructs the first device to receive and measure a first reference signal, and instructs the second device to report first information, wherein the first information is obtained by correcting the measurement result of the first reference signal according to a first phase, the first phase is a phase determined according to the measurement result of the first path and the first reference signal, or the first phase is a phase determined according to the measurement result of a third reference signal, the first path is one of one or more paths between the first device and the second device, and the third reference signal is a reference signal used for phase correction.

[0048] In an optional embodiment, the device further includes a storage unit (sometimes also referred to as a storage module), and the processing unit is used to couple with the storage unit and execute the program or instructions in the storage unit, so as to enable the device to perform the function of the third device described in any one of the first to second aspects above.

[0049] In a fifth aspect, an apparatus is provided. The apparatus may be a terminal device, or a chip or chip system used in a terminal device. Alternatively, the apparatus may be a network device, or a chip or chip system used in a network device. The apparatus includes a communication interface and a processor, and optionally, a memory. The memory is used to store a computer program, and the processor is coupled to the memory and the communication interface. When the processor reads the computer program or instructions, the apparatus executes the method performed by the first apparatus in each of the above aspects.

[0050] In a sixth aspect, an apparatus is provided. The apparatus may be a network device, or a chip or chip system used in a network device. Alternatively, the apparatus may be a terminal device, or a chip or chip system used in a terminal device. The apparatus includes a communication interface and a processor, and optionally, a memory. The memory is used to store a computer program, and the processor is coupled to the memory and the communication interface. When the processor reads the computer program or instructions, the apparatus executes the method performed by the third apparatus in each of the above aspects.

[0051] In a seventh aspect, a system is provided, comprising a first device and a third device, wherein the first device is configured to execute the method described in the first or second aspect and executed by the first device, and the third device is configured to execute the method described in the first or second aspect and executed by the third device. For example, the first device may be implemented by the device described in the third or fifth aspect, and the third device may be implemented by the device described in the fourth or sixth aspect. Optionally, the system may further include other devices or equipment. For example, when the third device is not the second device, the system may further include the second device, without limitation.

[0052] In an eighth aspect, a computer-readable storage medium is provided, wherein the computer-readable storage medium is used to store a computer program or instruction. When the computer program or instruction is executed, the method performed by the first device and / or the third device in the above aspects is implemented.

[0053] In a ninth aspect, a computer program product comprising instructions is provided, which enables the methods described in the above aspects to be implemented when the computer program or instructions are executed on a computer.

[0054] In a tenth aspect, a chip system is provided, comprising a processor and an interface, wherein the processor is configured to call and execute instructions from the interface, so that the chip system implements the methods of the above aspects. BRIEF DESCRIPTION OF THE DRAWINGS

[0055] FIG1 is a schematic diagram of an application scenario of an embodiment of the present application;

[0056] FIG2 is a flow chart of an information transmission method provided in an embodiment of the present application;

[0057] FIG3 is a schematic diagram showing the distribution of first reference signal resources within a time slot according to an embodiment of the present application;

[0058] FIG4 is a schematic diagram of the periodic distribution of the first reference signal resource in an embodiment of the present application;

[0059] FIG5 is a schematic diagram of obtaining a first channel coefficient in an embodiment of the present application;

[0060] FIG6 is a flowchart of another information transmission method provided in an embodiment of the present application;

[0061] FIG7 is a schematic diagram of a second apparatus sending a first reference signal and a third reference signal according to an embodiment of the present application;

[0062] FIG8 is a flowchart of another information transmission method provided in an embodiment of the present application;

[0063] FIG9 is a schematic diagram of a device provided in an embodiment of the present application;

[0064] FIG10 is a schematic diagram of another device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0065] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the embodiments of the present application will be further described in detail below with reference to the accompanying drawings.

[0066] In the embodiments of the present application, the number of nouns, unless otherwise specified, means "singular noun or plural noun", that is, "one or more". "At least one" means one or more, and "plural" means two or more. "And / or" describes the association relationship of associated objects, indicating that there may be three relationships. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone, where A and B can be singular or plural. The character " / " generally indicates that the previous and next associated objects are in an "or" relationship. For example, A / B means: A or B. "At least one of the following items" or similar expressions refers to any combination of these items, including any combination of single items or plural items. For example, at least one of a, b, or c means: a, b, c, a and b, a and c, b and c, or a and b and c, where a, b, c can be single or multiple.

[0067] In the embodiments of this application, ordinal numbers such as "first" and "second" are used to distinguish multiple objects and are not used to define the size, content, order, timing, priority, or importance of multiple objects. In addition, the numbering of steps in the various embodiments introduced in this application is only to distinguish different steps and is not used to define the order of the steps. For example, S201 can occur before S202, or after S202, or simultaneously with S202.

[0068] Below, some terms or concepts in the embodiments of the present application are explained to facilitate understanding by those skilled in the art.

[0069] In the embodiments of the present application, a terminal device is a device with wireless transceiver capabilities, and may be a fixed device, a mobile device, a handheld device (such as a mobile phone), a wearable device, an in-vehicle device, or a wireless device built into the above devices (such as a communication module, a modem, or a chip system, etc.). The terminal device in the embodiments of the present application can implement one or more functions such as perception, positioning, or communication. The terminal device is used to connect people, objects, machines, etc., and can be widely used in various scenarios, such as but not limited to the following scenarios: perception scenarios, positioning scenarios, cellular communications, device-to-device communications (D2D), vehicle to everything (V2X), machine-to-machine / machine-type communications (M2M / MTC), Internet of Things (IoT), virtual reality (VR), augmented reality (AR), industrial control, self-driving, remote medical, smart grid, smart furniture, smart office, smart wearable, smart transportation, smart city, drones, robots, indoor commercial scenarios (such as mobile phone screen projection, file sharing, and mobile phone to VR glasses video transmission) and other scenarios. When the terminal device is applied to V2X, it can also be called a V2X device, for example, a smart car (or intelligent car), a digital car, an unmanned car (or driverless car or pilotless car or automobile), a self-driving car (or autonomous car), a pure electric vehicle (or battery EV), a hybrid electric vehicle (HEV), a range-extended EV (REEV), a plug-in hybrid electric vehicle (PHEV), a new energy vehicle (new energy vehicle), or a roadside unit (RSU). The terminal device can also be a device used in D2D communication, such as an electricity meter or water meter.

[0070] In addition, in the embodiments of the present application, the terminal device can also be a terminal device in an IoT system. IoT is an important part of the future development of information technology. Its main technical feature is to connect objects to the network through communication technology, thereby realizing an intelligent network of human-machine interconnection and object-to-object interconnection.

[0071] The various terminal devices described above, if located on a vehicle (e.g., placed in or installed in a vehicle), can be considered as vehicle-mounted terminal devices, which are also referred to as on-board units (OBUs). The terminal device of the present application can also be an on-board module, on-board module, on-board component, on-board chip, or on-board unit built into a vehicle as one or more components or units, and the vehicle can implement the method of the present application through the built-in on-board module, on-board module, on-board component, on-board chip, or on-board unit.

[0072] The terminal device may sometimes be referred to as user equipment (UE), terminal, access station, UE station, remote station, wireless communication device, or user equipment, etc.

[0073] In the embodiments of the present application, the apparatus for implementing the terminal device function may be a terminal device, or may be a device capable of supporting the terminal device to implement the function, such as a chip system, which may be installed in the terminal device. In the technical solutions provided in the embodiments of the present application, the apparatus for implementing the terminal device function is a terminal device as an example to describe the technical solutions provided in the embodiments of the present application. In addition, for the convenience of description, the terminal device in the embodiments of the present application is described as a UE.

[0074] The network devices in the embodiments of the present application include, for example, access network devices and / or core network devices. The network devices in the embodiments of the present application can implement one or more functions such as perception, positioning or communication. The access network device is a device with wireless transceiver function, which is used to communicate with the terminal device. The access network devices include but are not limited to base stations (base transceiver station (BTS), node B (Node B), evolved node B (eNodeB) / eNB, or next generation node B (gNodeB) / gNB), transmission reception points (TRP), base stations subsequently evolved by the third generation partnership project (3GPP), access nodes in wireless fidelity (Wi-Fi) systems, wireless relay nodes, wireless backhaul nodes, etc. The base station can be: a macro base station, a micro base station, a pico base station, a small station, a relay station, etc. Multiple base stations can support networks with the same access technology or networks with different access technologies. The base station can include one or more co-sited or non-co-sited transmission and reception points. The access network device may also be a wireless controller, a centralized unit (CU), and / or a distributed unit (DU) in a cloud radio access network (CRAN) scenario. The access network device may also be a server, etc. For example, the network device in the V2X technology may be a road side unit (RSU). The following describes the access network device using a base station as an example. The base station can communicate with the terminal device, or it can communicate with the terminal device through a relay station. The terminal device can communicate with multiple base stations in different access technologies. The core network device is used to implement functions such as mobility management, data processing, session management, policy and billing. The names of the devices that implement core network functions in systems with different access technologies may be different, and the embodiments of the present application are not limited to this.Taking the fifth generation mobile communication technology (5G) system as an example, the core network equipment includes: access and mobility management function (AMF), session management function (SMF), policy control function (PCF), user plane function (UPF), function for sensing (such as sensing function (SF), or function for positioning (such as location management function (LMF), etc.

[0075] In the embodiments of the present application, the apparatus for implementing the network device function may be a network device, or may be a device capable of supporting the network device in implementing the function, such as a chip system, which may be installed in the network device. In the technical solutions provided in the embodiments of the present application, the technical solutions provided in the embodiments of the present application are described by taking the network device as an example.

[0076] The following describes the technical features involved in the embodiments of this application.

[0077] Wireless sensing is a key technology for the future. In wireless sensing, a transmitting device can send signals to its surroundings, and a receiving device can receive the signals reflected by the environment. By comparing and analyzing the correlation between the received and transmitted signals, the transceiver can determine relevant information about the surrounding environment, such as the presence of a target object to be detected or sensed, the distance between the scatterer and the transceiver, the orientation or angle (including horizontal and vertical) of the scatterer relative to the transceiver, and the speed of the scatterer relative to the transceiver. For example, in V2X scenarios, vehicles can use wireless sensing to obtain information about their surroundings, including the position and speed of moving objects such as vehicles and pedestrians, as well as information about relatively stationary objects such as road surfaces and fences. For another example, in scenarios such as airports, sensing devices can be deployed to monitor drones to prevent them from impacting the takeoff and landing of passenger aircraft. In homes, wireless sensing can be used to detect intruders, improving security and privacy.

[0078] Dual-base sensing is a relatively important sensing mode in wireless sensing. In dual-base sensing, the surrounding environment can usually be perceived by having one device send a signal and another device receive the signal. Specifically, the receiving device measures the received signal to obtain a channel measurement result. The channel measurement result is closely related to the surrounding environment. For example, the position of objects in the environment and the movement of objects (including linear motion or periodic vibrations such as breathing and heartbeat) will affect the channel measurement result. The channel measurement result obtained by the receiving device includes both amplitude information and phase information. The combination of the two reflects the environmental information that needs to be perceived.

[0079] However, the channel measurement results obtained by the receiving device generally include not only environmental information, but also the influence of equipment factors. Specifically, the channel measurement results obtained by the receiving device are generally equivalent baseband measurement results. Therefore, when the RF device of the device has some non-ideal factors, the baseband measurement results will include both environmental information and the influence of the RF device. For example, when the carrier frequencies of the transceiver devices are inconsistent, the baseband measurement results may include phase deviations caused by carrier frequency deviations; for example, when the crystal oscillator of the transceiver device is non-ideal, the baseband measurement results may include additional phase noise, etc. It can be seen that the channel measurement results obtained by the receiving device include not only environmental information, but also interference information caused by equipment factors. Therefore, the accuracy of the environmental information determined based on the channel measurement results is low, or it can be understood that the accuracy of the perception results is low.

[0080] For example, referring to Figure 1, device 2 sends a reference signal to device 1, and device 1 measures the reference signal to obtain a channel measurement result. For example, the channel measurement result is represented by a channel coefficient, which includes two parts. The first part is the environmental information (H s +H d ), which is the perception result to be obtained, where H s is the channel coefficient corresponding to the line of sight (LoS) path between the two devices, H d is the channel coefficient corresponding to the path between the two devices after being reflected by the target (such as the person in Figure 1). When both devices remain stationary, H s It is usually a constant value; when the sensing target is in a non-stationary state, such as human movement, human limb movement, human breathing and heartbeat, or human speech, etc., it will cause H d Changes have occurred. d The changes in H include changes in amplitude and / or phase, and when the linear movement distance of the target is small, H d The change is mainly reflected in the change of phase. According to some algorithms, H dThe target information can be inferred by the changes in the target, such as the target's moving speed, movement pattern, breathing rate, heart rate, and even language content. However, due to the above-mentioned equipment influencing factors, the actual channel coefficient measured by device 1 is (H s +H d )e jθ , where θ is the additional phase caused by equipment factors such as phase noise or carrier frequency deviation, and j is the imaginary unit, which can be expressed as Generally speaking, the existence of carrier frequency deviation will introduce additional phase deviation that varies with time, and the phase noise may also vary with time, so the overall e jθ It changes dynamically over time. jθ The existence of will reduce the accuracy of the perception results.

[0081] In 5G communication scenarios, the phase deviation caused by the above-mentioned equipment factors will also cause the equivalent baseband channel of the communication to fluctuate in time. Therefore, in the 5G system, the transmitter can add a phase tracking reference signal (PTRS) to the transmitted signal when sending the signal. Since the phase change caused by phase noise and carrier frequency deviation changes less in the frequency domain and changes more in the time domain, the PTRS is relatively sparse in the frequency domain and denser in the time domain, and is usually distributed on each orthogonal frequency division multiplexing (OFDM) symbol. By receiving the PTRS, the receiver of the signal can track the phase change of the signal on each OFDM symbol, thereby recovering the signal sent by the transmitter.

[0082] However, although the receiving end can track the phase change of the signal on each OFDM symbol through PTRS, the phase change also includes the phase deviation caused by equipment factors and the phase deviation caused by environmental factors. That is, since the goal in the communication scenario is to recover the signal sent by the signal transmitter, the phase deviation caused by equipment factors and the phase caused by environmental factors can be eliminated through PTRS to determine the signal originally sent by the signal transmitter. The perception scenario requires extracting the phase caused by environmental information factors, so as to perceive the environmental information based on the phase. Therefore, even if PTRS is applied to the perception scenario, it is impossible to eliminate only the phase deviation caused by equipment factors and extract the phase information related to environmental factors alone. In other words, it can be understood that the elimination result of PTRS is a comprehensive reflection of the phase deviation caused by equipment factors and the phase caused by environmental factors, and cannot reflect the phase caused by environmental information factors alone, so it is impossible to determine the environmental information based on the elimination result.

[0083] In view of this, the embodiment of the present application can correct the measurement result of the first reference signal according to the first phase. The first phase can be the phase of the first path, or the phase determined according to the reference signal used for phase correction. For example, the first phase can reflect the phase deviation caused by equipment factors. By correcting the measurement result of the first reference signal according to the first phase, the phase deviation caused by equipment factors in the measurement result of the first reference signal can be removed as much as possible, so that the first information obtained after correction only includes environmental information as much as possible without including the phase deviation caused by equipment factors. The environmental information determined according to the first information is more accurate.

[0084] For an application scenario of an embodiment of the present application, please continue to refer to Figure 1. Figure 1 takes a dual-base sensing scenario as an example, which can also be understood as a "self-transmitting and other-receiving" scenario. The so-called "spontaneous transmission and other-receiving" refers to a working mode in which one device acts as a signal transmitter and the other device acts as a signal receiver. For example, in Figure 1, device 2 can send a signal, and other devices (such as device 1 in Figure 1) can receive the signal reflected after the signal reaches the target. Device 1 can measure the received signal and determine the environmental information based on the measurement result. In an embodiment of the present application, device 1 can correct the measurement result based on the first phase, which will be introduced later. Figure 1 takes the target as a person as an example, but it is not limited to this.

[0085] The scenario shown in Figure 1 is only an example, and the embodiments of the present application can also be applied to other perception scenarios. For example, the embodiments of the present application can also be applied to the "self-transmitting and self-receiving" scenario. The so-called "self-transmitting and self-receiving" refers to a working mode in which a device acts as both a signal transmitter and a signal receiver. For example, a device can send a signal and also receive a signal reflected after the signal reaches the target. The device can measure the received signal and determine environmental information based on the measurement results. In this scenario, the first device and the second device involved in the embodiments of the present application can be the same device.

[0086] Among them, the first device can realize one or more functions such as perception, positioning or communication, and the first device is, for example, a terminal device or a functional module set in a terminal device, such as a chip system or a module in a chip system, or the first device is, for example, a network device or a functional module set in a network device, such as a chip system or a module in a chip system, etc.; the second device can realize one or more functions such as perception, positioning or communication, and the second device is, for example, a terminal device or a functional module set in a terminal device, such as a chip system or a module in a chip system, etc., or the second device is, for example, a network device or a functional module set in a network device, such as a chip system or a module in a chip system, etc. Among them, the first device and the second device can be devices of the same type, such as both are terminal devices; or the first device and the second device can also be devices of different types, such as the first device is a terminal device and the second device is a network device, etc., and the embodiments of the present application do not limit this.

[0087] The method provided by the embodiment of the present application is described below in conjunction with the accompanying drawings. In the various embodiments of the present application, "correction" may also be referred to as "calibration", "adjustment" or "modification", etc., and there is no limitation on the name. For example, "correcting B according to A" can be understood as changing B according to A, or changing the value of B according to A. In the various embodiments of the present application, the time unit is, for example, a frame, and the sub-time unit is, for example, a sub-frame, a slot, a mini-slot, an OFDM symbol group or an OFDM symbol; or, the time unit is, for example, a sub-frame, and the sub-time unit is, for example, a slot, a mini-slot, an OFDM symbol group or an OFDM symbol; or, the time unit is, for example, a slot, and the sub-time unit is, for example, a mini-slot, an OFDM symbol group or an OFDM symbol; or, the time unit is, for example, a mini-slot, and the sub-time unit is, for example, an OFDM symbol group or an OFDM symbol; or, the time unit is, for example, an OFDM symbol group, and the sub-time unit is, for example, an OFDM symbol; or, the time unit is an OFDM symbol. In various embodiments of the present application, frequency units are, for example, subcarriers, or other units in the frequency domain. Subcarriers are primarily used as examples in the description herein. "Subcarrier" can be replaced with "frequency unit," and "reference subcarrier" can be replaced with "reference frequency unit." In various embodiments of the present application, antennas, antenna ports, antenna units, antenna arrays, etc. can be understood as the same concept and can be interchanged.

[0088] The various embodiments herein may be applied to the network architecture shown in Figure 1. For example, the first device described in the various embodiments herein may be device 1 in Figure 1, and the second device described in the various embodiments herein may be device 2 in Figure 1. The third device described in the various embodiments herein may be, for example, the second device, or may be a third-party device not shown in Figure 1. In the figures corresponding to the various embodiments herein, all steps indicated by dashed lines are optional steps.

[0089] An embodiment of the present application provides an information transmission method. Please refer to FIG2 , which is a flowchart of the method.

[0090] S201. The third device configures a first reference signal resource for the first device. For example, the third device may send first configuration information to the first device, and the first configuration information is used to configure the first reference signal resource. The first reference signal resource can be used to send and / or receive a first reference signal. Generally speaking, the reference signal resource and the reference signal have an associated relationship, so the configuration information of the reference signal resource can also be understood as the configuration information of the reference signal. In the embodiment of the present application, in some cases, the two concepts of reference signal resource and reference signal can replace each other. For example, "associated with xx reference signal resource" can also be understood as "associated with xx reference signal".

[0091] Among them, the third device is, for example, the second device (a device that subsequently sends the first reference signal), or a third-party device other than the first device and the second device. For example, the third-party device is an access network device, or a network element, function or server responsible for the perception function in the core network, or it can also be an application server for processing perception services, etc.

[0092] If the third device and the second device are different devices, then optionally, the third device may further configure the first reference signal resource for the second device in a manner similar to the manner in which the third device configures the first reference signal resource for the first device.

[0093] Optionally, the first configuration information may further instruct the first apparatus to receive and measure the first reference signal. For example, the first configuration information may include first request information, where the first request information instructs the first apparatus to receive and measure the first reference signal. Specifically, the first request information may be to receive the first reference signal on a first reference signal resource. Alternatively, the first configuration information configures the first reference signal resource, which may be considered to implicitly instruct the first apparatus to receive and measure the first reference signal. Therefore, the first configuration information does not need to instruct the first apparatus to receive and measure the first reference signal through additional information.

[0094] If the third device also configures the first reference signal resource for the second device, the third device may also instruct the second device to transmit the first reference signal. For example, the third device may configure the first reference signal resource for the second device by sending second configuration information to the second device. For example, the second configuration information may include third request information, and the third request information instructs the second device to transmit the first reference signal. Specifically, the third request information may be to transmit the first reference signal on the first reference signal resource. Alternatively, the second configuration information configures the first reference signal resource and can be considered to implicitly instruct the second device to transmit the first reference signal. Therefore, the second configuration information does not need to instruct the second device to transmit the first reference signal through additional information.

[0095] The first reference signal resource can be a non-periodic resource or a periodic resource. In an OFDM system, when the first reference signal resource is a periodic resource, the first reference signal resource can present a periodic pattern in the time domain. In addition, the first reference signal resource can be a broadband signal in the frequency domain. For example, the first reference signal resource can be distributed in the frequency domain in a comb manner. Within a period, the first reference signal resource can occupy one or more sub-time units, wherein when occupying multiple sub-time units, the first reference signal resource can correspond to the same or different comb offsets in different sub-time units.

[0096] For example, refer to Figure 3, which shows the structure of the first reference signal resource within a time slot. Figure 3 uses the example of a time slot as the time unit, an OFDM symbol as the sub-time unit, and a time slot consisting of 14 OFDM symbols. Each square in Figure 3 represents a resource element (RE), and the shaded squares in Figure 3 represent the location of the first reference signal resource. As shown in Figure 3, the first reference signal resource has four comb teeth in the frequency domain, meaning that the first reference signal resource occupies one subcarrier every four subcarriers in the frequency domain. Furthermore, the comb tooth offsets corresponding to the first reference signal resource vary across different OFDM symbols. For example, for OFDM symbols 0-3, the comb tooth offsets of the first reference signal resource are {0, 2, 1, 3}, respectively. Optionally, within a time slot, the first reference signal resource may be repeated across different OFDM symbols. For example, in Figure 3, the distribution of the first reference signal resource in OFDM symbols 0-3 is the same as that in OFDM symbols 4-7, equivalent to the first reference signal resource being repeated twice within the time slot.

[0097] Optionally, within a cycle, the first reference signal resource may also be repeated in different time units. For example, referring to Figure 4, one square represents a time unit, and Figure 4 takes the time unit as an example of a time slot. The shaded squares in Figure 4 represent the position of the first reference signal resource, and the distribution of the first reference signal resource in the shaded squares within a cycle may be the same or different (for example, cyclically according to a certain time domain offset and / or frequency domain offset). The distribution of the first reference signal resource in a time slot may refer to Figure 3, or other distribution methods may be used. It can be seen that the first reference signal resource is repeated twice in a cycle in units of time slots, with a repetition interval of 2 time slots. In addition, the repetition method of the first reference signal resource between cycles is also similar.

[0098] When the first reference signal resource is a non-periodic resource, it can be understood that the first reference signal resource only exists in one period. The distribution method of the first reference signal resource in the period is similar to the above method and will not be elaborated herein.

[0099] As can be seen from the above, the first reference signal resource can be a periodic resource, that is, the first reference signal resource can be repeated periodically. Optionally, the resources in different periods included in the first reference signal resource can be configured as different reference signal resources, that is, the first reference signal resource can include multiple reference signal resources, where each reference signal resource corresponds to one period. For example, in Figure 4, the resources of the first reference signal resource in the first period can be configured as reference signal resource A, and the resources of the first reference signal resource in the first period can be configured as reference signal resource B. Alternatively, the resources in all periods included in the first reference signal resource can be configured as the same reference signal resource. For example, in Figure 4, the resources of the first reference signal resource in the first period and the second period (optionally, more subsequent periods) can be uniformly configured as reference signal resource A.

[0100] Within a period, the first reference signal resource may be repeated between time units (e.g., FIG4 ). Optionally, different repetitive time units included in the first reference signal resource may be configured as different reference signal resources. For example, in FIG4 , the resources of the first repetitive time slot within the first period may be configured as reference signal resource C, the resources of the second repetitive time slot within the first period may be configured as reference signal resource D, the resources of the first repetitive time slot within the second period may be configured as reference signal resource E, and the resources of the second repetitive time slot within the second period may be configured as reference signal resource F. Alternatively, all resources included in the first reference signal within a period may be configured as the same reference signal resource. For example, in FIG4 , the resources of the first repetitive time slot and the resources of the second repetitive time slot within the first period may be uniformly configured as reference signal resource C, and the resources of the first repetitive time slot and the resources of the second repetitive time slot within the second period may be uniformly configured as reference signal resource D.

[0101] In addition, the first reference signal resource may also be repeated within a time unit (e.g., FIG3 ). Optionally, different repeated resources included in the first reference signal resource within a time unit may be configured as different reference signal resources. For example, in FIG3 , the resources of OFDM symbols 0 to 3 may be configured as reference signal resource G, and the resources of OFDM symbols 4 to 7 may be configured as reference signal resource H. Alternatively, the resources of the first reference signal resource within a time slot may be uniformly configured as one reference signal resource. For example, in FIG3 , the resources of OFDM symbols 0 to 3 and the resources of OFDM symbols 4 to 7 may be uniformly configured as reference signal resource G.

[0102] When the first reference signal resource is a non-periodic resource, a similar configuration method may be used, which will not be described in detail here.

[0103] Based on the above description, the first reference signal resource may also include multiple reference signal resources, wherein the distribution mode and configuration method of each reference signal resource in the time domain and / or frequency domain, etc., can refer to the above description of the first reference signal resource.

[0104] Alternatively, the first reference signal resource may be pre-configured in the first device, or pre-defined by a protocol, and then S201 may not be performed. Therefore, S201 is an optional step.

[0105] S202: The third device instructs the first device to report the measurement result. For example, the third device sends a second request message to the first device, and the second request message may instruct to report the measurement result.

[0106] The second request information is, for example, included in the first configuration information, that is, the second request information and the first request information may be included in the same information; or the second request information may not be included in the first configuration information, but sent separately.

[0107] Optionally, the second request information may indicate parameters to be reported, and the first device may report the parameters configured by the second request information. For example, the parameters indicated by the second request information include one or more of the following: channel coefficients, phase information of one or more paths between the first device and the second device, Doppler frequency information of one or more paths between the first device and the second device, Doppler spectrum information, or autocorrelation function (ACF) information. Alternatively, if the second request information does not indicate parameters to be reported, the first device may determine the reporting parameters on its own.

[0108] Optionally, the second request information may indicate that the reported parameter is corrected according to the first phase.

[0109] Among them, the first device can determine the channel coefficient by measuring the first reference signal corresponding to the first reference signal resource. Generally speaking, the channel coefficient may include the channel coefficient on each subcarrier occupied by the first reference signal resource. For example, on a certain subcarrier of a certain OFDM symbol occupied by the first reference signal resource, the first device can usually obtain the reference signal from the second device through configuration information and / or standard-related definitions, and the first device can then determine the channel coefficient by comparing it with the received signal. This process can also be understood as channel estimation. Optionally, the first device can also perform windowing, filtering, denoising and other processing in this process.

[0110] The one or more paths include all or part of the transmission path between the first device and the second device. Since the signal received by the first device is a signal transmitted and mixed together through multiple paths, the first device can distinguish the multipaths through some dimensions, such as time delay (usually requiring the reference signal to be a broadband signal), Doppler frequency (usually requiring the reference signal to be sent continuously or intermittently for a period of time), or angle (usually requiring the receiving end to have multiple receiving antennas and / or the transmitting end to use multiple antennas to send the reference signal). For example, for each of the one or more paths, the first device can further determine one or more of the parameters such as time delay, Doppler frequency, or angle of each path, as well as one or more of the power, energy, amplitude, or phase information corresponding to each path.

[0111] For example, in Figure 1, device 2 can transmit a signal from device 2 to device 1 via two paths. One path is the direct path from device 2 to device 1, often referred to as the direct path or LoS path. The other path is the path from device 2 to device 1 after the signal is reflected by the target, also known as the reflection path. The Doppler frequency of the direct path is primarily determined by the speed of devices 1 and 2. For example, when both devices are stationary, the Doppler frequency corresponding to the LoS path is 0. Parameters such as the amplitude and phase of the LoS path are generally related to the transmission distance between the two devices and the medium. The Doppler frequency of the reflection path associated with the target is not only related to the speed of devices 1 and 2, but also to the movement of the target. For example, when both devices 1 and 2 are stationary, the Doppler frequency of the reflection path is primarily determined by the speed of the target. The amplitude and phase of the reflection path are not only related to the distance between device 2 and the target, the distance between the target and device 1, and the transmission medium, but also to the reflection coefficient of the target. The magnitude of the reflection coefficient of the target may be related to the radar cross-section (RCS) of the target.

[0112] Among them, the multiple paths distinguished by the first device through some methods may not necessarily correspond to a certain path in the real channel environment. For example, since the ability of the first device to distinguish multipath is limited, a certain path identified by the first device may correspond to multiple paths with similar parameters in the real environment. For example, when the bandwidth of the first reference signal is limited, the resolution ability of the first device to identify multipath delay is also limited, then the first device may identify multiple paths with similar delays as one path; for example, when the first device has only a single antenna (or a single antenna port), the first device does not have the ability to resolve multipath in the angle domain. At this time, if there are two paths with the same delay and the same Doppler frequency but different arrival angles, the first device may only be able to distinguish the multipath in the delay domain and the Doppler domain, but cannot distinguish the multipath in the angle domain, so the first device may still identify the two paths as one path. In an embodiment of the present application, the multipath information reported by the first device may refer to the multipath information identified by the first device.

[0113] The Doppler spectrum information can be used to reflect the Doppler frequency distribution of the channel between the first device and the second device. The Doppler spectrum may include one or more of a Doppler power spectrum, a Doppler energy spectrum, a Doppler amplitude spectrum, or a Doppler phase spectrum. That is, the Doppler spectrum indicates one or more of the power, energy, amplitude, or phase corresponding to each Doppler frequency component. In the Doppler spectrum, the Doppler frequency components are generally equally spaced (in the extreme case, including all Doppler frequencies within a certain Doppler frequency range). The Doppler spectrum can be determined based on the channel coefficients measured by the first device. Furthermore, in addition to being related to the Doppler frequency, the Doppler spectrum may also be related to other dimensions. For example, the Doppler spectrum may be a delay-Doppler frequency spectrum, which may reflect the joint distribution of the delay and Doppler frequency of the channel between the first device and the second device. For another example, the Doppler spectrum may be an angle-Doppler frequency spectrum, which may reflect the joint distribution of the angle and Doppler frequency of the channel between the first device and the second device, wherein the angle may be the angle of arrival, the angle of departure (also referred to as the angle of departure), or the angle of arrival plus the angle of departure, wherein both the angle of arrival and the angle of departure may include the horizontal angle and / or the vertical angle. For another example, the Doppler spectrum may be a delay-angle-Doppler frequency spectrum, which may reflect the joint distribution of the delay, angle, and Doppler frequency of the channel between the first device and the second device. During the actual processing process, the first device can determine a channel distribution spectrum related to certain dimensions based on channel coefficients (e.g., channel coefficients in different frequency units, sub-time units, and antennas) using methods such as Fourier transform, multiple signal classification (MUSIC), and compressed sensing. Furthermore, the first device can identify multipath at locations where parameters such as energy, amplitude, or power on the channel distribution spectrum are greater than a threshold.

[0114] The autocorrelation function information is generally used to describe the degree of correlation between channels at different time periods. Generally speaking, when a channel exhibits a certain periodic variation, the channel's autocorrelation function will exhibit local peaks at the periodicity. The autocorrelation coefficient can also be determined based on the channel coefficient measured by the first device.

[0115] Optionally, the second request information may further instruct the first device to report the corrected measurement result, or instruct the first device to perform phase correction when reporting the measurement result, for example, instructing the first device to report the measurement result corrected according to the first phase. The first phase will be described later.

[0116] Alternatively, the first device may also proactively report the measurement result without configuration by the third device, so S202 is an optional step.

[0117] S203: The second device sends a first reference signal. Correspondingly, the first device receives the first reference signal. The second device may send the first reference signal through a first reference signal resource, and the first device may also receive the first reference signal through the first reference signal resource.

[0118] Optionally, the first device may receive the first reference signal directly from the second device, or may receive the first reference signal indirectly from the second device. For example, when the first device is a chip, the first reference signal may be first received by an external antenna that is not part of the first device, and then the first reference signal received by the antenna may be transmitted to the first device via the communication interface of the first device. The first device may receive other reference signals (e.g., the second reference signal and / or the third reference signal) or information (e.g., configuration information and / or indication information) in a similar manner, which will not be further described below.

[0119] S204: The first device sends the first information to the third device. Correspondingly, the third device receives the first information from the first device.

[0120] The first information may be obtained by correcting the measurement result of the first reference signal based on the first phase. For example, the first device measures the first reference signal to obtain a measurement result, such as measurement result A. The first device corrects measurement result A based on the first phase to obtain the first information, which may also be referred to as the corrected measurement result. Alternatively, it can be understood more broadly that the first information may be determined based on the measurement results of the first phase and the first reference signal.

[0121] The first reference signal resource may occupy one or more sub-time units, and the first device may determine the first phase for each of the sub-time units. For example, for the sub-time unit n occupied by the first reference signal resource, the first phase determined by the first device is θ n .

[0122] For any sub-time unit, the first phase may be a phase determined based on the first path, or a phase determined based on the measurement results of the first path and the first reference signal. The first path may be, for example, one of the one or more paths between the first device and the second device. Optionally, the first path may be, for example, a path with the smallest delay among the one or more paths, or a path that is first detected (or received) by the first device in time among the multiple paths. For example, the first path is the LoS path between the first device and the second device. Alternatively, the first path may be any other path among the one or more paths, without limitation.

[0123] The first path in the embodiments of the present application can also be understood as a reference path. That is, the embodiments of the present application use the first path as a phase reference. When the first path is stationary, the phase of the first path remains constant. However, due to equipment factors, the phase actually measured by the first device may vary. Therefore, the phase of the first path also reflects the phase variation caused by equipment factors. Correcting the measurement results of the first reference signal based on the first phase can minimize the impact of equipment factors on the measurement results and improve perception accuracy. When a LoS path exists between the first and second devices and both the first and second devices are stationary, the phase of the LoS path itself remains unchanged. Furthermore, because the LoS path itself has a high signal strength and the extracted phase is more accurate, selecting this LoS path as the first path results in a better correction effect. Alternatively, when no LoS ​​path exists between the first and second devices, the first and second devices can search for another path with stable phase and higher signal strength as the first path. Optionally, even if a LoS path exists between the first and second devices, the first and second devices can search for another path with stable phase other than the LoS path as the first path. The embodiments of the present application do not limit the specific method by which the first and second devices determine the first path.

[0124] In another case, when the target to be sensed and the first device are in a similar motion state, the result of sensing the target may include the target's motion information. For example, if the target to be sensed is a person and the first device is a mobile phone, and the person is walking with the mobile phone, the sensing result obtained by sensing the person may include information about the person's motion. However, if the sensing service needs to sense micro-motion information such as a person's breathing or heartbeat, the person's motion may cause significant interference to the detection of the person's breathing or heartbeat. In this case, the first path can be set to the LoS path between the mobile phone and the second device. Since the speed and direction of the person's and the mobile phone's motion are roughly the same, the phase change of the LoS path mainly contains the person's motion information. In this case, the phase of the LoS path is used to correct the sensing result, which can suppress the interference of the person's motion on the sensing results of parameters such as breathing or heartbeat.

[0125] Optionally, for any sub-time unit, the first phase is, for example, a phase determined based on a channel coefficient measured after receiving the first reference signal via the first path. The first reference signal resource may occupy multiple subcarriers. After the first device receives the first reference signal via the first path, a channel coefficient can be measured for each subcarrier occupied by the first reference signal resource. In this case, the first phase may be determined based on the phases of the channel coefficients on all subcarriers measured after receiving the first reference signal via the first path. For example, the first phase is the phase corresponding to the channel coefficient measured after receiving the first reference signal via the first path.

[0126] Alternatively, for any sub-time unit, the first phase is, for example, a phase determined based on a channel coefficient on a reference subcarrier measured after receiving the first reference signal via the first path. For example, the first phase is a phase corresponding to a channel coefficient on a reference subcarrier measured after receiving the first reference signal via the first path. In this implementation, the first phase may be associated with a reference subcarrier. The reference subcarrier may be, for example, one of the subcarriers occupied by the first reference signal resource, or a subcarrier in a resource pool where the first reference signal resource is located, or a subcarrier in a bandwidth part (BWP) where the first reference signal resource is located, or a subcarrier in a frequency layer where the first reference signal resource is located, or a subcarrier with a center frequency of 0. When the reference subcarrier is one of the subcarriers occupied by the first reference signal resource, for example, the reference subcarrier is the subcarrier with the lowest or highest frequency occupied by the first reference signal resource, or the center subcarrier occupied by the first reference signal resource, or may be any subcarrier occupied by the first reference signal resource.

[0127] Alternatively, for any sub-time unit, the first phase is, for example, a phase determined based on a channel coefficient measured after receiving the first reference signal via the first path and via the reference antenna port and / or the first reference signal port. For example, the first phase is a phase corresponding to a channel coefficient measured after receiving the first reference signal via the first path and via the reference antenna port and / or the first reference signal port. In this implementation, the first phase may be associated with the reference antenna port and / or the first reference signal port. When the first reference signal resource is a multi-port reference signal resource, the second device may transmit a first reference signal having multiple ports, also referred to as a multi-port first reference signal. Generally speaking, the second device may use multiple antenna ports to transmit the multi-port first reference signal. The reference signal resource ports used by the multiple antenna ports may be orthogonal (e.g., orthogonal in the joint space of the time domain, frequency domain, and code domain), so the reference antenna port may be associated with the transmitting antenna port. In addition, the first device may also use multiple receive antenna ports for reception when receiving the first reference signal. For example, the first device may use these multiple receive antenna ports for angle estimation. In this case, the first reference signal may not need to have multiple receive antenna ports. When the second device transmits a multi-port first reference signal using multiple transmit antenna ports, even if the first device receives the first reference signal at the multiple ports using the same receive antenna port via the first path, the measured phases may differ. When the first device receives the first reference signal using multiple receive antenna ports, even if the first reference signal has only one port (which can also be understood as the second device using only one antenna port to transmit the first reference signal), the phases measured by different antenna ports of the first device receiving the first reference signal via the first path may differ. The situation is similar when the first reference signal has multiple ports and the first device has multiple receive antenna ports, and will not be further described. Therefore, in the above situation, it can be stipulated or defined that, in different sub-time units, the antenna port (which can include the transmit antenna port and / or the receive antenna port) and the reference signal port (e.g., the first reference signal port) associated with the first phase can each be a fixed port, thereby ensuring consistency of measurement results in different sub-time units.

[0128] Alternatively, for any sub-time unit, the first phase is, for example, a phase determined based on a channel coefficient on a reference subcarrier measured after receiving a first reference signal via the first path and via a reference antenna port and / or a first reference signal port. For example, the first phase is a phase corresponding to a channel coefficient on a reference subcarrier measured after receiving a first reference signal via the first path and via a reference antenna port and / or a first reference signal port. In this implementation, the first phase may be associated with a reference subcarrier, as well as with a reference antenna port and / or a first reference signal port.

[0129] Optionally, in the above manner, the reference frequency unit (or reference subcarrier), the first reference signal port, and the reference antenna port (including the transmitting antenna port and / or the receiving antenna port) may be predefined or preconfigured, or may be determined by specific configuration information, for example, the first configuration information indicates one or more of the specific reference frequency unit, the first reference signal port, or the reference antenna port. For example, the reference antenna port is one of the antenna ports used by the second device to send the first reference signal, for example, the antenna port with the smallest or largest port number among the antenna ports used by the second device to send the first reference signal. For another example, the reference antenna port is one of the antenna ports used by the first device to receive the first reference signal, for example, the antenna port with the smallest or largest port number among the antenna ports used to receive the first reference signal. For another example, the first reference signal port is one of the multiple reference signal ports corresponding to the first reference signal, for example, the first reference signal port is the reference signal port with the smallest or largest port number among the multiple reference antenna ports.

[0130] Optionally, when the first device has multiple reference antenna ports or reference signal ports, the first device may also determine a first phase for each reference antenna port or reference signal port corresponding to a sub-time unit. For example, for a sub-time unit n, the first device may determine the first phase on the reference antenna port p to be θ n,p .

[0131] To determine the first phase, the first device must first determine the first path. In the embodiment of the present application, the first device can determine the first path in a variety of ways, as described below with examples.

[0132] 1. In the first mode, the first device determines the first path by itself according to the measurement result of the first reference signal.

[0133] In this manner, after receiving the first reference signal, the first device can determine the first path independently without the need for instructions from other devices (such as the second device), which helps to save signaling overhead.

[0134] Optionally, the first device may distinguish multiple paths based on the measurement results of the first reference signal, and then determine the first path therefrom. For example, the first device distinguishes one or more paths between the first device and the second device in the time delay domain by using some existing methods; for another example, the first device may also distinguish multiple paths in the time delay + angle domain (which may include horizontal angle of arrival (AoA), vertical AoA, horizontal angle of departure (AoD), and vertical AoD). Optionally, the first device may determine the path with the smallest time delay among the multiple paths as the first path, or determine the path with the strongest one or more of energy, amplitude, or power as the first path, or may also determine the first path by combining time delay, and one or more of energy, amplitude, or power.

[0135] For example, after receiving the first reference signal, the first device can determine multiple paths, each of which has its corresponding propagation delay, AoA or AoD. The propagation delay corresponding to a path can refer to an absolute propagation delay (i.e., the time interval from the time when the second device sends the first reference signal to the time when the first device receives the first reference signal through the path), or it can be a relative propagation delay, for example, the relative delay is the delay of the reception time of the path relative to the starting time domain position or the ending time domain position of the time unit or time subunit where the first reference signal is located. Generally speaking, the LoS path is the path with the shortest delay between two devices, so the first device can determine the path with the earliest arrival time from multiple paths as the LoS path, and this LoS path can be used as the first path. The AoD of one path may be the AoD in a local coordinate system or a global coordinate system. The special AoD may be the AoD in a local coordinate system relative to the antenna panel of the second device as the xy plane. The AoA of one path may be the AoA in a local coordinate system or a global coordinate system. The AoA and AoD mentioned below are similar and will not be repeated here.

[0136] The method used by the first device to distinguish multipaths may include discrete Fourier transform (DFT), inverse discrete Fourier transform (IDFT), MUSIC, etc., or may also include other algorithms.

[0137] In this manner, the first device may also report indication information of the first path to the third device, such as the delay and angle (including AoA and AoD) corresponding to the first path.

[0138] 2. In the second approach, the third device sends a first indication message to the first device. The first indication message includes parameter information related to the first path. The first device then determines the first path based on the first indication message. This approach simplifies the implementation of the first device and is therefore applicable to devices with lower capabilities.

[0139] In this manner, the first indication information received by the first device may include configuration information for the first path, and the first device may determine the first path based on the configuration information for the first path. The first indication information may be included in the first configuration information, or may be sent separately. In one possible implementation, the configuration information for the first path may include one or more of the following: AoA information associated with the first path, latency information associated with the first path, a precoding vector corresponding to the first path, path index information associated with the first path, identification information for the first path, or a timestamp associated with the first path.

[0140] For example, the second device may send a second reference signal in advance, and after receiving the second reference signal, the first device may send a first measurement result to the third device, where the first measurement result is the measurement result of the second reference signal. The third device may determine the first path based on the first measurement result, for example, the first path is a LoS path. When the third device has strong computing and processing capabilities, it may use some high-performance algorithms to assist in determining a more accurate LoS path. Optionally, the third device may send relevant parameters for determining the LoS path to the first device via the configuration information of the first LoS path, so that the first device can determine the first path based on the configuration information of the first path.

[0141] In one possible implementation, the first measurement result may include one or more of the following: at least one second channel coefficient, at least one first delay power spectrum, at least one first precoding matrix indicator (PMI), or path information of N paths. The N paths are all or part of the paths between the first device and the second device, and N is a positive integer. The path information of a path may include one or more of the following: an index of the path, an identifier of the path, delay information corresponding to the path, AoA information of the path, angle of departure (AoD) information of the path, or LoS path information of the path. The LoS path information of a path may indicate whether the path is a LoS path and / or indicate the probability that the path is a LoS path. For example, if one of the N paths is a second path, the path information of the second path may include one or more of the following: an index of the second path, an identifier of the second path, delay information corresponding to the second path, AoA information of the second path, AoD information of the second path, or LoS path information of the second path. The LoS path information of the second path may indicate whether the second path is a LoS path and / or indicate a probability that the second path is a LoS path.

[0142] When the first measurement result includes at least one second channel coefficient, one of the second channel coefficients may be a channel coefficient vector or a channel coefficient matrix over multiple frequency units and / or multiple time units and / or multiple antenna units. The third device can determine one or more of the following based on at least one second channel coefficient: the delay of each path in part or all of the paths between the first device and the second device (wherein the delay of one path can be the absolute propagation delay from the second device sending the second reference signal to the first device receiving the second reference signal, or it can be the relative propagation delay of the first device receiving the second reference signal relative to the starting time domain position or the ending time domain position of a certain reference time unit or a certain reference sub-time unit. For example, the reference time unit is the time unit or sub-time unit where the second reference signal is located), the AoA (which can be in the local coordinate system of the first device or in the global coordinate system) and / or AoD corresponding to each path in part or all of the paths between the first device and the second device, the amplitude corresponding to each path in part or all of the paths between the first device and the second device, the phase corresponding to each path in part or all of the paths between the first device and the second device, or the received power or energy corresponding to each path in part or all of the paths between the first device and the second device. The configuration information of the first path may indicate one or more of the following: the delay of the first path, the AoA associated with the first path, the AoD associated with the first path, the amplitude corresponding to the first path, the phase corresponding to the first path, or the received power corresponding to the first path. For example, the configuration information of the first path indicates the delay corresponding to the first path. The first device may determine the phase of the channel coefficient at the delay (for example, the phase of the tap coefficient at the delay after the IDFT of each subcarrier channel coefficient) as the first phase when receiving the first reference signal based on the delay. For another example, the configuration information of the first path indicates the AoA associated with the first path. The first device may determine the direction of the first path based on the AoA, and then determine the phase of the channel coefficient in the direction (for example, the phase of the tap coefficient at the frequency corresponding to the AoA after the DFT of the channel coefficient on each receiving antenna port) as the first phase in combination with the channel coefficient on each receiving antenna port.

[0143] When the first measurement result includes at least one first delay power (or energy, amplitude, or coefficient) spectrum, the third device can determine the delays of different paths based on the first delay power spectrum, and determine the delay of the first path therefrom. The configuration information of the first path can indicate the delay corresponding to the first path, and the first device can determine the phase of the channel coefficient under the delay (for example, the phase of the tap coefficient of each subcarrier channel coefficient under the delay after IDFT) as the first phase when receiving the first reference signal based on the delay. Optionally, the delay power spectrum can be the delay power spectrum on multiple antennas and / or multiple moments (for example, time units or sub-time units), and the third device can independently combine, average, or filter the multiple delay power spectra.

[0144] When the first measurement result includes at least one PMI (in this case, the second reference signal is generally a reference signal for multiple antenna ports), the above-mentioned PMI may be a PMI that performs spatial domain compression, or a PMI that performs spatial and frequency domain compression, or other types of PMI. The third device may determine the departure angles of different paths on the first device side based on at least one PMI, and determine the departure angle corresponding to the first path therefrom. The configuration information of the first path may indicate a precoding vector (or equivalently, a departure angle). The first device may determine the phase of the channel coefficient at the departure angle (for example, the phase of the tap coefficient at the frequency corresponding to the departure angle after DFT of the channel coefficients on each transmitting reference signal port) based on the precoding vector information when receiving the first reference signal (usually the first reference signal is required to be a reference signal for multiple antenna ports), thereby more accurately determining the direction of the first path based on the first reference signal. Among them, when the above-mentioned PMI includes a PMI that performs frequency domain compression, the third device may also determine the delay associated with different paths based on at least one PMI, and therefore may also indicate the delay corresponding to the first path in the configuration information of the first path, which will not be repeated here.

[0145] Optionally, the configuration information of the first path may also indicate the above multiple items, and the first device may combine the multiple items of information to more accurately determine the coefficient and phase information of the first path.

[0146] When the first measurement result includes the path information of N paths, the N paths may be N paths determined by the first device itself. The AoA information of a path may include the AoA of the path, and the AoA of the path may include the horizontal angle of arrival (azimuth angle of arrival, A-AoA) of the path and / or the vertical angle of arrival (zenith angle of arrival, Z-AoA) of the path. The AoA of a path may be an AoA with reference to a local coordinate system (LCS) or an AoA with reference to a global coordinate system (GCS). The AoD of the path may include the horizontal AoD of the path and / or the vertical AoD of the path. The AoA and / or AoD of a path may be with reference to a local coordinate system or a global coordinate system.

[0147] The third device may determine the first path from the N paths, for example, the LoS path, by indicating one or more of the index, identifier, or path information of the first path in the N paths in the configuration information of the first path. The first device may determine the first path based on the configuration information of the first path.

[0148] The number of second reference signals may be one or more, and the first measurement result may include one or more measurement results. The third device may then determine the parameters of the first path based on all or part of the second reference signals, or determine the parameters of the first path based on all or part of the measurement results in the first measurement result. The first device can determine the parameters of the first path based on the configuration information of the first path, but may not be able to determine which second reference signal(s) the first path parameters correspond to, or which measurement results the first path parameters correspond to. To this end, the first indication information may optionally further include indication information of the second reference signal and / or indication information of the first measurement result. The indication information of the second reference signal, for example, referred to as indication information A, may indicate some or all of the one or more second reference signals. The second reference signal indicated by indication information A is the second reference signal used to determine the parameters of the first path. The indication information of the first measurement result, for example, referred to as indication information B, may indicate some or all of the measurement results included in the first measurement result. The measurement result indicated by indication information B is the measurement result used to determine the parameters of the first path. Thus, the first device can determine the parameters of the first path by combining the configuration information of the first path with indication information A and / or indication information B.

[0149] Optionally, indication information A indicates the second reference signal. For example, one indication method is to indicate the transmission time of the second reference signal. For example, if the second reference signal is a periodic signal, indication information A may indicate one or more periods thereof, which is equivalent to indicating that the parameters of the first path are determined based on the second reference signal within these one or more periods. Alternatively, indication information A may also indicate the number of the second reference signal, etc. There is no limitation on the indication method.

[0150] Alternatively, the first indication information may not include indication information A and indication information B. In this case, if there are multiple second reference signals and / or the first measurement result includes multiple measurement results, the first device and the third device may default to determining the parameters of the first path based on the first transmitted second reference signal (or the first transmitted measurement result in the first measurement result) or based on the last transmitted second reference signal (or the last transmitted measurement result in the first measurement result).

[0151] In addition to the two methods described above, the first device can also determine the first path in other ways, which are not limited in the present embodiment. After determining the first path, the first device can determine the first phase. For an introduction to the first phase, please refer to the above.

[0152] Optionally, as described above, when the first device determines the first path according to the first indication information, the method may further include S205 to S207, wherein S205 to S207 may occur before S204, and FIG2 takes S205 to S207 as an example in which S201 occurs before S201.

[0153] S205: The second device sends a second reference signal. Correspondingly, the first device receives the second reference signal.

[0154] For example, the third device may first configure the second reference signal resource for the first device, and the second device may then transmit the second reference signal using the second reference signal resource. The process for configuring the second reference signal resource by the third device can be referred to as described above for configuring the first reference signal resource, and will not be described in detail here. Alternatively, the first device may independently determine the second reference signal resource. Alternatively, the third device does not need to configure the second reference signal resource for the first device; the second reference signal resource may be preconfigured in the first device or predefined via a protocol.

[0155] S206: The first device sends a measurement result of the second reference signal to the third device, for example, referred to as a first measurement result. Correspondingly, the third device receives the first measurement result.

[0156] For more details about S206 , such as the first measurement result, etc., please refer to the above description.

[0157] S207: The third device sends first indication information to the first device. Correspondingly, the first device receives the first indication information from the third device.

[0158] For more information about S207, such as the first instruction information, etc., please refer to the above introduction.

[0159] In the above description of the second approach, the third device determines the parameters of the first path based on the second reference signal (or the second measurement result). Alternatively, the third device may also determine the first path based on other information.

[0160] In addition to the above methods, the first device can also determine the first path according to other methods, which are not limited in the embodiments of the present application.

[0161] Once the first device determines the first path, it can determine the first phase, and thus correct the measurement result of the first reference signal (hereinafter referred to as measurement result A) according to the first phase to obtain the first information. Optionally, the first information includes one or more of the following: a first channel coefficient, phase information of one or more paths between the first device and the second device, Doppler frequency information of the one or more paths, first Doppler spectrum information, or first autocorrelation function information. If the second request information in S202 indicates the parameters to be reported, the first information may include the parameters indicated by the second request information; or, if the second request information in S202 does not indicate the parameters to be reported, the first device may determine the parameters included in the first information on its own.

[0162] The first channel coefficient may be obtained by correcting the measurement result of the first phase on the first reference signal (for example, including the initial channel coefficient). The phase information of the one or more paths may be obtained by correcting the measurement result of the first phase on the first reference signal (for example, the initial phase information of the one or more paths). The first Doppler spectrum information and / or the first autocorrelation function information may be obtained based on the first channel coefficient. However, since the first channel coefficient is obtained by correcting the measurement result of the first phase on the first reference signal, the first Doppler spectrum information and / or the first autocorrelation function information may also be considered to be obtained by correcting the measurement result of the first phase on the first reference signal.

[0163] The first channel coefficient, for example, includes a channel coefficient corresponding to a sub-time unit occupied by the first reference signal resource, or includes a channel coefficient corresponding to each sub-time unit in multiple sub-time units occupied by the first reference signal resource. Optionally, the first channel coefficient may also include a channel coefficient on one or more frequency units, and one or more antenna ports (including a transmitting antenna port and / or a receiving antenna port), so the first channel coefficient may be a scalar, a vector or a matrix (including a two-dimensional matrix or a multi-dimensional matrix). Optionally, the first channel coefficient may be uncompressed information, or it may be information obtained by compressing the corrected channel coefficient in any one or more domains such as the frequency domain, the time domain or the angle domain. For example, the above-mentioned channel coefficient may be compressed and then reported in a form similar to the precoding matrix indication in 5G.

[0164] For example, for the sub-time unit n occupied by the first reference signal resource, the first device can measure the first reference signal received through the sub-time unit n, and according to the obtained measurement result, it can be determined that the initial channel coefficient corresponding to the sub-time unit n is H n (The initial channel coefficient refers to the channel coefficient before the first phase correction, or the channel coefficient obtained by direct measurement (which may include basic channel estimation, time domain windowing, filtering and other operations), and may include the initial channel coefficients on multiple frequency units, that is, at this time H n can be a vector), H n It may include only the resources occupied by the first reference signal resource, or may include the resources not occupied by the first reference signal resource, such as the channel coefficients on the resources not occupied by the first reference signal resource obtained by difference, filtering, or other channel estimation methods. In addition, based on the obtained measurement results and the determined first path, the first phase corresponding to the sub-time unit n may be determined as θ n .

[0165] In one possible manner, the first device may determine that the delay corresponding to the first path is τ n , for example τ n It can be determined by the first device itself or configured by other devices. Then, the first device can determine the first phase θ n for The phase of The phase of H n,k represents the channel coefficient on the sub-time unit n and the frequency unit (such as subcarrier) k, and j represents the imaginary unit, such as k represents the index of the frequency unit subcarrier, k can be an integer greater than or equal to 0, Δf represents the size of the frequency unit subcarrier, for example, represents the frequency width of a subcarrier. kIndicates the absolute frequency magnitude of the frequency unit subcarrier k. In addition, the first device may also determine the first phase by combining the angle through a similar method, which will not be described in detail here.

[0166] The first device can use θ n For H n Correction is performed to obtain a first channel coefficient corresponding to sub-time unit n, or to obtain a channel coefficient corresponding to sub-time unit n included in the first channel coefficient. For example, the first channel coefficient corresponding to sub-time unit n or the channel coefficient corresponding to sub-time unit n included in the first channel coefficient satisfies the following relationship:

[0167] Among them, H′ n It represents the first channel coefficient corresponding to the sub-time unit n or the channel coefficient corresponding to the sub-time unit n included in the first channel coefficient.

[0168] Formula 1 can also be understood as: n The phase of each element in is subtracted by θ n , we can get H′ n .

[0169] The above method can be further extended. For example, when the initial channel coefficient is H n In scenarios including additional antenna port (receiving antenna port and / or transmitting antenna port) domains or reference signal port domains, the implementation method is similar and will not be repeated here.

[0170] Optionally, the first channel coefficient included in the first information includes, for example, H′ n , or including H′ in any one or more domains such as frequency domain, time domain or angle domain n The compressed information, for specific methods, can refer to the PMI reporting in the 5G system. Or, if the first information includes the first channel coefficient H′ n And does not include other information, and the first device does not further process the first channel coefficient (such as compression, etc.), then the first device can directly report after determining the first channel coefficient, and can skip the step of determining the first information based on the first channel coefficient.

[0171] Optionally, when the first reference signal is a multi-port signal, the initial channel coefficient of each port in the multi-port corresponding to the first reference signal on the sub-time unit n can be corrected according to the first phase (for example, the phase of the initial channel coefficient can be subtracted by θ n Or multiply by ). When the first device has multiple receiving antenna ports, the channel coefficient of each receiving antenna port in the sub-time unit n can also be corrected according to the first phase.

[0172] Please refer to Figure 5, which shows an example of a first device obtaining a first channel coefficient. The horizontal axis in Figure 5 represents the delay in seconds; the vertical axis represents the amplitude of the delay component. For example, for N OFDM symbols occupied by the first reference signal resource, the first device first obtains an initial channel coefficient H, which includes channel coefficients corresponding to K subcarriers × N OFDM symbols. The first device determines the first path. In addition, the first device identifies the first phase θ on each OFDM symbol. n For example, for OFDM symbol n, the first device identifies the original coefficient corresponding to the channel coefficient on OFDM symbol n as follows:

[0173] In formula 2, H n represents the original phase corresponding to the channel coefficient on OFDM symbol n (refer to the first peak from left to right in the coordinate diagram below Figure 5), A n Indicates the amplitude corresponding to the LoS path on OFDM symbol n, Represents the first phase corresponding to the LoS path on OFDM symbol n, θ′ n represents the carrier frequency deviation on OFDM symbol n and the phase deviation caused by factors such as phase noise, then The whole is used as the first phase for subsequent phase correction.

[0174] Afterwards, for the initial channel coefficient corresponding to each OFDM symbol, the first device can determine a first phase on the corresponding OFDM symbol, and then use the first phase to perform compensation. The compensation method can refer to Formula 1.

[0175] The phase information of any one of the one or more paths, for example, indicates the phase of the path, or indicates the phase difference of the phase of the path relative to the first phase. Wherein, if the phase information of a path indicates the phase of the path, it can indicate the phase after the initial phase of the path is adjusted by the first phase, which can also be called the adjusted phase. Wherein, the paths other than the LoS path between the first device and the second device can be called reflection paths, and a reflection path generally corresponds to a reflector (or called a target). Therefore, the reflection path can also be understood as being associated with a certain reflector, and the time delay, phase, angle, etc. of a reflection path can also be understood as the time delay, phase, angle, etc. associated with the reflector or a certain target.

[0176] Optionally, the phases of the multiple paths that can be reported by the first device may be multiple paths other than the first path. Since the first path is used as a reference path, according to the method of the embodiment of the present application, the phase corresponding to the first path may always be zero, and the first device may not report this.

[0177] Optionally, the adjusted phase of the one or more paths may also correspond to a time unit or a sub-time unit. For example, for a sub-time unit occupied by the first reference signal, the phase information of any one of the one or more paths may indicate the adjusted phase of the path on the sub-time unit, or indicate the phase difference between the initial phase of the path on the sub-time unit and the first phase on the sub-time unit. For example, for each sub-time unit occupied by the first reference signal resource, the first information may include information of one or more paths corresponding to the sub-time unit, that is, multiple adjusted phases in different time units or different sub-time units may be reported for each path; or, the first information may only include information of one or more paths corresponding to one of the sub-time units occupied by the first reference signal resource. The first device may be configured to receive the information of the one or more paths according to the H signal. n , use DFT, IDFT, MUSIC or other methods to distinguish each path and determine the initial phase of each path.

[0178] The first device can select a subcarrier s from the subcarriers occupied by the first reference signal resource as a reference subcarrier (as mentioned above, the first phase can be associated with the reference subcarrier. The reference subcarrier here and the reference subcarrier associated with the first phase can be the same subcarrier, or can also be different subcarriers. For the sake of convenience, the reference subcarrier here can be called the first reference subcarrier. The first reference subcarrier is, for example, recorded as subcarrier s. The method for determining the first reference subcarrier can refer to the method for determining the reference subcarrier described above, and will not be repeated here.), and the first device uses the first phase to perform phase correction on the channel coefficients on each sub-time unit occupied by the first reference signal resource (the correction method can be referred to above). For each sub-time unit, the channel coefficient corresponding to subcarrier s can be obtained, and the channel coefficients corresponding to subcarrier s on each sub-time unit can be obtained. Where n0, n1, etc. represent the index of the sub-time unit. Doppler spectrum information (e.g., first Doppler spectrum information) or Doppler frequency information of one or more paths can be obtained through DFT, IDFT, or other algorithms. The Doppler spectrum indicated by the first Doppler spectrum information may include one or more of energy information, power information, amplitude information, or phase information corresponding to the multiple Doppler frequencies. The Doppler frequency information of the one or more paths may indicate one or more of the Doppler frequency, energy information, power information, amplitude information, or phase information of each path.

[0179] Optionally, the first device may also select multiple subcarriers occupied by the first reference signal resource as first reference subcarriers. For each first reference subcarrier, the first device may determine Doppler spectrum information or Doppler frequency information of one or more paths. The first Doppler spectrum information in the first information may be determined based on the Doppler spectrum information corresponding to the multiple first reference subcarriers; and / or, the Doppler frequency information of the one or more paths in the first information may be determined based on the Doppler frequency information of the one or more paths corresponding to the multiple first reference subcarriers. Alternatively, the first Doppler spectrum information in the first information may include multiple pieces of Doppler spectrum information determined based on the multiple first reference subcarriers; and / or, the Doppler information of each path in the Doppler frequency information of the one or more paths in the first information may include multiple pieces of Doppler information for each path determined based on the multiple first reference subcarriers. For example, the Doppler frequency information of the one or more paths in the first information may be obtained by linearly combining the Doppler frequency information of the one or more paths corresponding to the multiple first reference subcarriers. For example, in one linear combination method, the first device may linearly combine the Doppler frequency information of one or more paths corresponding to the multiple first reference subcarriers using a maximum combining ratio, thereby obtaining the Doppler frequency information of one or more paths included in the first information.

[0180] Alternatively, the first device may also perform similar operations in combination with multiple ports of the first reference signal and / or multiple receiving antenna ports of the first device.

[0181] Alternatively, the Doppler spectrum in the first information may be a delay-Doppler spectrum, an angle-Doppler spectrum, or a delay-angle-Doppler spectrum, etc. With respect to the delay-Doppler spectrum, the first device performs phase correction on the initial channel coefficients on each sub-time unit occupied by the first reference signal resource (the correction method can be referred to above), and the channel coefficients corresponding to each frequency unit and each sub-time unit occupied by the first reference signal resource can be obtained. These channel coefficients can constitute a two-dimensional channel coefficient matrix. For example, the channel coefficient corresponding to the sub-time unit n occupied by the first reference signal resource is expressed as H′ n , then the two-dimensional channel coefficient matrix is ​​expressed as Where n0, n1, etc. represent the index of the sub-time unit. The channel coefficient matrix is ​​processed by a 2D DFT, IDFT or MUSIC algorithm to obtain a delay-Doppler spectrum. With respect to the angle (e.g., angle of arrival)-Doppler spectrum, the first device performs phase correction on the initial channel coefficients on each receiving antenna port and each sub-time unit. For example, on each sub-time unit n, the initial channel coefficients on each receiving antenna port are all phase-corrected according to the first phase θ on the sub-time unit n. nAfter correction, the angle (e.g., angle of arrival)-Doppler spectrum is obtained. Furthermore, the first device may also obtain a corrected delay-angle-Doppler spectrum using a similar method. Optionally, the first device may also use a similar method to determine Doppler frequency information of one or more paths in the first information based on the delay-Doppler spectrum, the angle-Doppler spectrum, or the delay-angle-Doppler spectrum.

[0182] Autocorrelation function information can often reflect the characteristics of periodic motion. For example, in scenarios such as breathing, heartbeat, or mechanical vibration, the target's motion often repeats periodically, so the changes in the channel coefficients caused by the target's motion also exhibit a periodic pattern. Therefore, by determining the autocorrelation function information corresponding to the channel coefficient, the period of the channel coefficient change can be obtained. This period is usually the same as the period of the target's motion. Therefore, the frequency of the target's motion, such as the breathing rate, heartbeat rate, or mechanical vibration frequency, can also be determined using the autocorrelation function information. Exemplarily, the first device can select a subcarrier c from the subcarriers occupied by the first reference signal resource as a reference subcarrier (as mentioned above, the first phase can be associated with the reference subcarrier, and the reference subcarrier here and the reference subcarrier associated with the first phase can be the same subcarrier, or they can also be different subcarriers. In addition, the reference subcarrier here and the first reference subcarrier used to determine the Doppler information can be the same subcarrier, or they can also be different subcarriers. For the sake of convenience, the reference subcarrier here can be referred to as the second reference subcarrier, and the method for determining the second reference subcarrier can refer to the method for determining the reference subcarrier described above, which will not be repeated here.), and the first device uses the first phase to perform phase correction on the channel coefficients on each sub-time unit occupied by the first reference signal resource (the correction method can be referred to above). For each sub-time unit, the channel coefficient corresponding to the second reference subcarrier can be obtained, and the channel coefficients corresponding to the second reference subcarrier on each sub-time unit can be obtained. Where n0, n1, etc. represent the index of the sub-time unit, and s represents the second reference subcarrier. The first device may determine autocorrelation function information, for example, the autocorrelation function information is first autocorrelation function information included in the first information.

[0183] Alternatively, the first device may also select multiple subcarriers occupied by the first reference signal resource as second reference subcarriers, and determine an autocorrelation function information for each second reference subcarrier, so that a total of multiple autocorrelation function information can be obtained. The first autocorrelation function information included in the first information may directly include these multiple autocorrelation functions, or be determined based on these multiple autocorrelation function information. Optionally, the first device may linearly combine these multiple autocorrelation function information to obtain the first autocorrelation function information. For example, one linear combination method is that the first device linearly combines these multiple autocorrelation function information using a maximum combining ratio.

[0184] Alternatively, the first device may also perform similar operations in conjunction with multiple ports of the first reference signal (which may also be equivalent to the transmit antenna ports of the second device) and / or multiple receive antenna ports of the first device. For example, the first device may determine a reference signal port and / or a receive antenna port of the first device from the multiple ports of the first reference signal and / or the multiple receive antenna ports of the first device and then perform the above operations. The specific determination method can refer to the determination method of the reference antenna port and the first reference signal port described above and will not be repeated here. Alternatively, the first device may select multiple ports of the first reference signal as reference ports, determine an autocorrelation function information for each reference port, and obtain multiple autocorrelation function information in total. The first autocorrelation function information included in the first information may directly include these multiple autocorrelation functions or be determined based on these multiple autocorrelation function information. For another example, the first device may select multiple receive antenna ports of the first device as reference ports, determine an autocorrelation function information for each reference port, and obtain multiple autocorrelation function information in total. The first autocorrelation function information included in the first information may be determined based on these multiple autocorrelation function information. Alternatively, the above operations may be performed in conjunction with multiple reference signal ports and receive antenna ports.

[0185] In addition to the above parameters, the first information may also include other parameters corrected according to the first phase, which is not limited.

[0186] Optionally, the first device may also report the first information to a device other than the third device and the first device. That is, the device receiving the first information may be a device other than the device that transmits the first reference signal and the device that configures the first reference signal resources. For example, when the first device and the second device are both terminal devices, the third device may be an access network device, which may configure the first reference signal resources for the first device and the second device. In addition, there is a fourth device, which may be a core network device, which may receive the measurement results (e.g., the first information) from the first device.

[0187] Optionally, the third device obtains the first information and can perceive the environment based on the first information, or determine environmental information based on the first information, such as determining whether there is a target object to be detected or perceived in the environment, the distance between the scatterer and the transceiver device, the orientation or angle (including horizontal or vertical direction) of the scatterer relative to the transceiver device, the moving speed of the scatterer relative to the transceiver device, and other information. The embodiments of the present application do not limit the application method of the first information.

[0188] In an embodiment of the present application, the measurement result of the first reference signal can be corrected according to the first phase. The first phase can be the phase of the first path. For example, the first phase can reflect the phase deviation caused by equipment factors. By correcting the measurement result of the first reference signal according to the first phase, the phase deviation caused by equipment factors in the measurement result of the first reference signal can be removed as much as possible, so that the first information obtained after correction only includes environmental information as much as possible without including the phase deviation caused by equipment factors. In this way, the environmental information determined based on the first information is more accurate.

[0189] An embodiment of the present application provides another information transmission method. Please refer to FIG6 , which is a flowchart of the method.

[0190] S601. A third apparatus configures a first reference signal resource and a third reference signal resource for a first apparatus. For example, the third apparatus may send first configuration information to the first apparatus, where the first configuration information is used to configure the first reference signal resource and the third reference signal resource. The reference signal corresponding to the first reference signal resource is referred to as a first reference signal, where the reference signal corresponding to the first reference signal resource is, for example, a reference signal sent via the first reference signal resource. The reference signal corresponding to the third reference signal resource is referred to as a third reference signal, where the reference signal corresponding to the third reference signal resource is, for example, a reference signal sent via the third reference signal resource.

[0191] Optionally, the first reference signal resource and the second reference signal resource may also be understood as two different ports of the same reference signal resource. The embodiment of the present application is mainly described by taking these two reference signal resources as an example.

[0192] Among them, the third device is, for example, the second device, or a third-party device other than the first device and the second device. For example, the third-party device is an access network device, or a network element or server responsible for the perception function in the core network, or it can also be an application server for processing perception services, etc.

[0193] If the third device and the second device are different devices, then optionally, the third device may also configure the first reference signal resource and the third reference signal resource for the second device in a manner similar to that of configuring the first reference signal resource and the third reference signal resource for the first device.

[0194] Optionally, the first configuration information may further instruct the first apparatus to receive and measure the first reference signal, and instruct the first apparatus to receive and measure the third reference signal. For example, the first configuration information may include first request information, the first request information instructing the first apparatus to receive and measure the first reference signal, and instructing the first apparatus to receive and measure the third reference signal. Alternatively, if the first configuration information configures the first reference signal resource, it can be considered as implicitly instructing the first apparatus to receive and measure the first reference signal, and if the first configuration information configures the third reference signal resource, it can be considered as implicitly instructing the first apparatus to receive and measure the third reference signal. Therefore, the first configuration information does not need to instruct the first apparatus to receive and measure the first reference signal and the third reference signal through additional information.

[0195] If the third device also configures the first reference signal resource and the third reference signal resource for the second device, the third device may also instruct the second device to transmit the first reference signal and the third reference signal. For example, the third device may configure the first reference signal resource and the third reference signal resource for the second device by sending second configuration information to the second device. For example, the second configuration information may include third request information, and the third request information instructs the second device to transmit the first reference signal and the third reference signal. Alternatively, the second configuration information configures the first reference signal resource and the third reference signal resource, which can be considered to implicitly instruct the second device to transmit the first reference signal and the third reference signal. Therefore, the second configuration information does not need to instruct the second device to transmit the first reference signal and the third reference signal through additional information.

[0196] Regarding the distribution of the first reference signal resource in the time domain and frequency domain, etc., please refer to the description of the first reference signal resource in the embodiment shown in FIG2 . Regarding the distribution of the third reference signal resource in the time domain and frequency domain, etc., please refer to the description of the first reference signal resource in the embodiment shown in FIG2 .

[0197] Optionally, in this embodiment of the present application, the first phase may be a phase determined according to a measurement result of the third reference signal.

[0198] In millimeter wave or high-frequency communications, the transmitter and receiver can communicate using a beam-based approach, thereby improving the signal-to-noise ratio between the transceiver devices. Similarly, in sensing, a similar approach can be adopted to align the beam with the target to be sensed. As shown in Figure 7, when transmitting and receiving the first reference signal on the first reference signal resource, the transmit beam of the second device and the receive beam of the first device can be aligned with the target to be sensed. This can minimize the impact of noise and other interference on the measurement results of the first device. In beam-based sensing scenarios, there is also the problem of measurement results being affected by additional phase deviation caused by device factors. In embodiments of the present application, a third reference signal can be used for phase correction. For example, when transmitting the third reference signal, the second device can align its transmit beam with a reference path with relatively stable phase, such as the LoS path between the first and second devices. When receiving the third reference signal, the first device can also align its receive beam with the reference path, thereby concentrating the beam energy as much as possible on the reference path. The measurement result of the third reference signal can also primarily contain information about the reference path, thereby making the measured first phase more accurate. Optionally, the phase of the reference path can be the first phase in embodiments of the present application. Then the role of the reference path can be equivalent to the first path described in the embodiment shown in Figure 2. It is just that the first path in the embodiment shown in Figure 2 is related to the first reference signal, while the reference path in the embodiment of the present application is related to the third reference signal. In the embodiment of the present application, the first device can determine the first phase based on the third reference signal, and then use the first phase to correct the measurement result of the first reference signal to improve the accuracy of the correction result. It can be seen that the embodiment of the present application is different from the embodiment shown in Figure 2 in that the embodiment shown in Figure 2 uses the first reference signal to determine the first phase, while the embodiment of the present application uses another reference signal (the third reference signal) to determine the first phase.

[0199] Because the additional phase deviation caused by device influence may be different in different sub-time units, if the third reference signal is to be used to determine the first phase, the first reference signal resource and the third reference signal resource can be configured in the same sub-time unit. Therefore, in the embodiment of the present application, the time domain resources occupied by the first reference signal resource and the time domain resources occupied by the third reference signal resource can intersect. For example, the number of the same sub-time units occupied by the first reference signal resource and the third reference signal resource can be greater than or equal to 1. In the same sub-time unit occupied by the first reference signal resource and the second reference signal resource, the first reference signal resource and the second reference signal resource can occupy different subcarriers.

[0200] Optionally, the time domain resources occupied by the first reference signal resource and the time domain resources occupied by the third reference signal resource can completely overlap. On the time domain resources, the first reference signal resource and the third reference signal resource can occupy different subcarriers. For example, the subcarriers occupied by the two reference signal resources can be adjacent.

[0201] Optionally, the third device may also send second indication information to the first device, and the second indication information may indicate that the first reference signal resource and the third reference signal resource are associated. If the first device determines that the first reference signal resource and the second reference signal resource are associated, the measurement result of the first reference signal may be phase corrected according to the measurement result of the third reference signal, for example, the measurement result of the first reference signal may be phase corrected according to the first phase. Alternatively, the second indication information may not indicate that the first reference signal resource and the third reference signal resource are associated, but directly indicate that the measurement result of the first reference signal is phase corrected according to the measurement result of the third reference signal (or indicate that the first information is obtained by performing phase correction according to the measurement result of the third reference signal, or indicate that the first information is obtained by performing phase correction according to the measurement result of the third reference signal). The second indication information may be carried in the first configuration information, or may be sent separately.

[0202] Optionally, the third device may further send third indication information to the first device, where the third indication information may indicate one or more of the following: a transmit beam associated with the first reference signal resource, a receive beam associated with the first reference signal resource, a transmit beam associated with the third reference signal resource, or a receive beam associated with the third reference signal resource. For example, the third indication information may indicate the transmit beam associated with the first reference signal resource and the transmit beam associated with the third reference signal resource. The first device may determine the receive beam associated with the first reference signal resource based on the transmit beam associated with the first reference signal resource, and may determine the receive beam associated with the third reference signal resource based on the transmit beam associated with the third reference signal resource. Alternatively, the third indication information may indicate the transmit beam associated with the first reference signal resource, while the transmit beam associated with the third reference signal resource may be preconfigured and does not need to be indicated by the third indication information. The first device may determine the receive beam associated with the first reference signal resource based on the transmit beam associated with the first reference signal resource, and may determine the receive beam associated with the third reference signal resource based on the transmit beam associated with the third reference signal resource.

[0203] The beams described in the various embodiments of the present application may also be understood as beamforming vectors, spatial (or spatial, similarly hereinafter) filters, spatial parameters, or spatial filtering parameters, and the like. Therefore, a transmit beam may be understood as a transmit beamforming vector, a transmit spatial filter, a transmit spatial parameter, or a transmit spatial filtering parameter, and a receive beam may be understood as a receive beamforming vector, a receive spatial filter, a receive spatial parameter, or a receive spatial filtering parameter, and the like. Beam information may include one or more of the following: a beam identifier, a beam direction, a beam width, a specific beamforming vector, or a type D quasi co-location (QCL) source. Type D quasi co-location is generally used to describe that a receiving end can use the same or similar receive beams for reception when receiving on two reference signal resources (or two channels, or one reference signal resource and one channel). In the embodiment of the present application, different transmit beams may be configured for the first reference signal resource and the third reference signal resource, and / or different receive beams may be configured. Optionally, the beam used to send the third reference signal and the beam used to receive the third reference signal can be aligned with the reference path (the reference path is, for example, the first path described in the embodiment shown in FIG2 , or the LoS path between the first device and the second device) in a narrow beam or a wide beam, wherein when a narrow beam is used, it is beneficial to concentrate energy and can improve the accuracy of the measured first phase. The transmitting beam used to send the first reference signal and the receiving beam used to receive the first reference signal can be aligned with the target to be sensed, and the beam can be a wide beam or a narrow beam, but generally needs to be able to cover the sensed target. Therefore, the quasi-co-located source of type D of the first reference signal resource and the QCL source of type D of the third reference signal resource may be different. The third indication information can be carried in the first configuration information, or can also be sent separately.

[0204] Optionally, the first device and the second device can determine the transceiver beam to be used for transmitting and receiving the first reference signal (i.e., the beam corresponding to the perception target) and the transceiver beam to be used for transmitting and receiving the third reference signal (i.e., the beam corresponding to the reference path) through beam training. Optionally, the first device and / or the second device can report the beam training results to the third device, or the third device can determine the beam training results by itself, and then the third device determines the specific beam configuration information of the first reference signal resources and the third reference signal resources based on these results, and carries the beam information in the first configuration information to configure it to the first device and the second device.

[0205] S602: The third device instructs the first device to report the measurement result. For example, the third device sends a second request message to the first device, and the second request message may instruct to report the measurement result.

[0206] Optionally, the second request information may indicate that the reported measurement result is corrected according to the first phase. In this embodiment of the present application, the first phase is a phase determined according to the measurement result of the third reference signal.

[0207] For more details about S602 , please refer to S202 of the embodiment shown in FIG. 2 .

[0208] S603: The second device sends a first reference signal and a third reference signal. Correspondingly, the first device receives the first reference signal and the third reference signal.

[0209] The second device may transmit the first reference signal via the first reference signal resource, and the first device may receive the first reference signal via the first reference signal resource. The second device may transmit the third reference signal via the third reference signal resource, and the first device may receive the third reference signal via the third reference signal resource. Optionally, the first device and the second device may transmit and receive the first reference signal and the third reference signal based on the transmit and receive beams configured in S601. Optionally, the second device may transmit the first reference signal and the third reference signal based on the beam configuration information in S601; optionally, the first device may receive the first reference signal and the third reference signal based on the beam configuration information in S601.

[0210] S604: The first device sends the first information to the third device. Correspondingly, the third device receives the first information from the first device.

[0211] In this embodiment of the present application, the first information may be obtained by correcting the measurement result of the first reference signal based on the first phase. Unlike the embodiment shown in FIG2 , the first phase in this embodiment of the present application is determined based on a third reference signal, for example, based on the measurement result of the third reference signal. Therefore, it can also be considered that the first information is obtained by correcting the measurement result of the first reference signal based on the measurement result of the third reference signal.

[0212] The third reference signal resource may occupy one or more sub-time units, and the first device may determine the first phase for each of the sub-time units. For example, for the sub-time unit n occupied by the third reference signal resource, the first phase determined by the first device is θ n. It can be understood that the embodiment of the present application introduces the first phase as a reference for the phase. For example, the first phase is the phase of the reference path between the first device and the second device (the introduction to the reference path can be found in the previous text). When the reference path is stationary, the phase of the reference path will also remain constant. However, due to equipment factors, the phase actually measured by the first device will change. Therefore, the first phase also reflects the phase change caused by the equipment factors. By correcting the measurement result of the first reference signal according to the first phase, it is possible to eliminate the influence of the equipment factors on the measurement results as much as possible and improve the perception accuracy.

[0213] Optionally, for any sub-time unit, the first phase is, for example, a phase determined based on the channel coefficient measured after receiving the third reference signal. For example, the first phase is the phase corresponding to the channel coefficient measured after receiving the third reference signal. For example, for any sub-time unit, the first phase is, for example, the phase of the channel coefficient measured after receiving the third reference signal. The third reference signal resource may occupy multiple subcarriers. After the first device receives the third reference signal, the channel coefficient can be measured for each subcarrier occupied by the third reference signal resource. In this case, the first phase can be determined based on the phases of the channel coefficients on all subcarriers measured after the third reference signal.

[0214] Alternatively, for any sub-time unit, the first phase is, for example, a phase determined based on the channel coefficient on the reference subcarrier measured after receiving the third reference signal. For example, the first phase is the phase corresponding to the channel coefficient on the reference subcarrier measured after receiving the third reference signal. For example, for any sub-time unit, the first phase is, for example, the phase of the channel coefficient on the reference subcarrier measured after receiving the third reference signal. In this implementation, the first phase can be associated with the reference subcarrier. The reference subcarrier is, for example, one of the subcarriers occupied by the third reference signal resource, or a subcarrier in the resource pool where the third reference signal resource is located, or a subcarrier in the BWP where the third reference signal resource is located, or a subcarrier in the frequency layer where the third reference signal resource is located, or a subcarrier with a center frequency of 0. When the reference subcarrier is one of the subcarriers occupied by the third reference signal resource, for example, the reference subcarrier is the subcarrier with the lowest or highest frequency occupied by the third reference signal resource, or the center subcarrier occupied by the third reference signal resource, or it can also be any subcarrier occupied by the third reference signal resource.

[0215] Alternatively, for any sub-time unit, the first phase is, for example, a phase determined based on a channel coefficient measured after receiving a third reference signal through a reference antenna port and / or a first reference signal port. For example, the first phase is a phase corresponding to a channel coefficient measured after receiving a third reference signal through a reference antenna port and / or a first reference signal port. For example, for any sub-time unit, the first phase is, for example, a phase corresponding to a channel coefficient measured after receiving a third reference signal through a reference antenna port and / or a first reference signal port. In this implementation, the first phase can be associated with the reference antenna port and / or the first reference signal port. For more information on this, please refer to the similar content of S204 in the embodiment shown in Figure 2.

[0216] Alternatively, for any sub-time unit, the first phase is, for example, a phase determined based on a channel coefficient on a reference subcarrier measured after receiving a third reference signal through a reference antenna port and / or a first reference signal port. For example, the first phase is a phase corresponding to the channel coefficient on the reference subcarrier measured after receiving a third reference signal through a reference antenna port and / or a first reference signal port. For example, for any sub-time unit, the first phase is, for example, a phase corresponding to the channel coefficient on the reference subcarrier measured after receiving a third reference signal through a reference path and through a reference antenna port and / or a first reference signal port. In this implementation, the first phase can be associated with the reference subcarrier, as well as with the reference antenna port and / or the first reference signal port.

[0217] Optionally, in the above manner, the reference frequency unit, the first reference signal port, and the reference antenna port (including the transmit antenna port and / or the receive antenna port) may be predefined or preconfigured, or may be determined by specific configuration information. For example, the first configuration information indicates one or more of the specific reference frequency unit, the first reference signal port, or the reference antenna port. For more information on this, please refer to similar content in S204 of the embodiment shown in FIG2 .

[0218] Optionally, when the first device has multiple reference antenna ports or reference signal ports, the first device may also determine a first phase for each reference antenna port or reference signal port corresponding to a sub-time unit. For example, for a sub-time unit n, the first device may determine the first phase on the reference antenna port p to be θ n,p .

[0219] For more details about S604 , such as the phase correction method and the content of the first information, please refer to S204 in the embodiment shown in FIG. 2 .

[0220] Optionally, the third device obtains the first information and can perceive the environment based on the first information, or determine environmental information based on the first information, such as determining whether there is a target object to be detected or perceived in the environment, the distance between the scatterer and the transceiver device, the orientation or angle (including horizontal or vertical direction) of the scatterer relative to the transceiver device, the moving speed of the scatterer relative to the transceiver device, and other information. The embodiments of the present application do not limit the application method of the first information.

[0221] In an embodiment of the present application, the measurement result of the first reference signal can be corrected based on the first phase. The first phase can be a phase determined based on the third reference signal. For example, the first phase can reflect the phase deviation caused by equipment factors. By correcting the measurement result of the first reference signal based on the first phase, the phase deviation caused by equipment factors in the measurement result of the first reference signal can be removed as much as possible, so that the first information obtained after correction only includes environmental information as much as possible without including the phase deviation caused by equipment factors. The environmental information determined based on the first information is more accurate. In addition, the signal received by the first device on the third reference signal resource in the embodiment of the present application is mainly a signal transmitted through the LoS path, which can make the first phase determined by the first device more accurate, thereby further improving the accuracy of the perception result.

[0222] An embodiment of the present application provides another information transmission method. Please refer to FIG8 , which is a flowchart of the method.

[0223] In the embodiment of the present application, the third reference signal can be used for phase correction. For example, the first device can determine the first path based on the third reference signal, determine the phase of the first path (referred to as the first phase), and then use the first phase to correct the measurement result of the first reference signal. This means that one difference between the embodiment of the present application and the embodiment shown in FIG2 is that the embodiment shown in FIG2 uses the first reference signal to determine the first path, while the embodiment of the present application uses another reference signal (the third reference signal) to determine the first path; and one difference between the embodiment of the present application and the embodiment shown in FIG6 is that the embodiment shown in FIG6 uses the third reference signal to determine the first phase, while the embodiment of the present application uses the third reference signal to determine the phase of the first path.

[0224] S801: A third apparatus configures a first reference signal resource and a third reference signal resource for a first apparatus. For more information about S801, such as information related to the first reference signal resource and / or the third reference signal resource, a method for transmitting the third reference signal, and a relationship between the third reference signal and the first reference signal, please refer to S601 in the embodiment shown in FIG6 .

[0225] S802: The third device instructs the first device to report the measurement result. For example, the third device sends a second request message to the first device, and the second request message may instruct to report the measurement result.

[0226] Optionally, the second request information is used to indicate that the reported parameters are corrected according to the first phase. In an embodiment of the present application, the first phase is the phase of the first path determined according to the measurement result of the third reference signal, that is, in the embodiment of the present application, the first path is determined according to the measurement result of the third reference signal, and is no longer determined according to the measurement result of the first reference signal.

[0227] For more details about S802 , please refer to S202 of the embodiment shown in FIG. 2 .

[0228] S803: The second device sends a first reference signal and a third reference signal. Correspondingly, the first device receives the first reference signal and the third reference signal.

[0229] The second device may transmit the first reference signal via the first reference signal resource, and the first device may receive the first reference signal via the first reference signal resource. The second device may transmit the third reference signal via the third reference signal resource, and the first device may receive the third reference signal via the third reference signal resource. Optionally, the first device and the second device may transmit and receive the first reference signal and the third reference signal based on the transmit and receive beams configured in S801.

[0230] S804: The first device sends the first information to the third device. Correspondingly, the third device receives the first information from the first device.

[0231] In this embodiment of the present application, the first information may be obtained by correcting the measurement result of the first reference signal based on the first phase. Unlike the embodiment shown in FIG2 , in this embodiment of the present application, the first phase is determined based on the first path, and the first path may be related to the third reference signal. For example, the first path is determined based on the measurement result of the third reference signal. Therefore, it can also be considered that the first information is obtained by correcting the measurement result of the first reference signal based on the measurement result of the third reference signal.

[0232] In the embodiment of the present application, the first path is associated with the third reference signal. Optionally, the first device may independently determine the first path and / or the first phase based on the measurement result of the third reference signal; alternatively, the first device may also determine the first path and / or the first phase based on the first indication information from the third device. For details on how the first device determines the first path and / or the first phase, please refer to S204 in the embodiment shown in FIG2 . In addition, if the first device determines the first path and / or the first phase based on the first indication information, the method for determining the first path and / or the first phase in the embodiment of the present application may also refer to S205 to S207 in the embodiment shown in FIG2 .

[0233] Optionally, the first path is, for example, a LoS path between the first device and the second device. This means that although the third reference signal is transmitted as concentratedly as possible along the LoS path, energy may still leak to other paths. To further improve the accuracy of the selected reference path (first path), embodiments of the present application further determine the first path corresponding to the third reference signal, thereby enabling more accurate selection of the first path and improving the accuracy of the calibration result.

[0234] Regarding the first phase and correcting the measurement result according to the first phase to obtain the first information, please refer to S604 of the embodiment shown in Figure 6. In addition, regarding more details of S804, such as the phase correction method and the content included in the first information, please refer to S204 of the embodiment shown in Figure 2.

[0235] Optionally, the third device obtains the first information and can perceive the environment based on the first information, or determine environmental information based on the first information, such as determining whether there is a target object to be detected or perceived in the environment, the distance between the scatterer and the transceiver device, the orientation or angle (including horizontal or vertical direction) of the scatterer relative to the transceiver device, the moving speed of the scatterer relative to the transceiver device, and other information. The embodiments of the present application do not limit the application method of the first information.

[0236] In the embodiment of the present application, the measurement result of the first reference signal can be corrected according to the first phase. The first phase can be the phase of the first path, and the first path can be determined according to the third reference signal. For example, the first phase can reflect the phase deviation caused by equipment factors. By correcting the measurement result of the first reference signal according to the first phase, the phase deviation caused by equipment factors in the measurement result of the first reference signal can be removed as much as possible, so that the first information obtained after correction only includes environmental information as much as possible without including the phase deviation caused by equipment factors. The environmental information determined according to the first information is more accurate. In addition, the first device in the embodiment of the present application can determine the first path according to the third reference signal, so that the first path determined by the first device is more accurate, thereby further improving the accuracy of the perception result.

[0237] Optionally, the three embodiments shown in FIG. 2 , FIG. 6 , and FIG. 8 can be applied independently without being combined with each other; or, any two or three of the three embodiments can be applied in combination.

[0238] Taking the embodiment shown in FIG2 in combination with the embodiment shown in FIG6 as an example, the third device may configure both the third reference signal resource and the second reference signal resource for the first device; or the third device may configure both the third reference signal resource and the first device and send the first indication information to the first device; or the third device may configure both the third reference signal resource and the first device, and the first device may also determine the first path by itself based on the measurement result of the first reference signal. That is, for the first device, there may be multiple ways to determine the first phase. The first device can then choose one of the ways to determine the first phase, such as determining the first phase based on the first indication information (see S207 in the embodiment shown in FIG2 ), or determining the first phase based on the third reference signal (see the embodiment shown in FIG6 ). Alternatively, since the first phase determined based on the third reference signal can be more accurate, the first device may give priority to determining the first phase based on the third reference signal.

[0239] Taking the embodiment shown in FIG2 in combination with the embodiment shown in FIG8 as an example, the third device may configure both the third reference signal resource and the second reference signal resource for the first device; or the third device may configure both the third reference signal resource and the first device and send the first indication information to the first device; or the third device may configure both the third reference signal resource and the first device, and the first device may also independently determine the first path based on the measurement results of the first reference signal. In other words, there may be multiple methods for the first device to determine the first path. The first device may then select one of these methods to determine the first path, such as determining the first path based on the first indication information (see S207 in the embodiment shown in FIG2 ) or determining the first path based on the third reference signal (see the embodiment shown in FIG6 ). Alternatively, because the first path determined based on the third reference signal is more accurate, the first device may preferentially choose to determine the first path based on the third reference signal.

[0240] Figure 9 shows a schematic diagram of the structure of a device provided in an embodiment of the present application. The device 900 may be the circuit system of the first device described in the embodiment shown in any one or more of Figures 2, 6 or 8, for implementing the method corresponding to the first device in the above method embodiment. Alternatively, the device 900 may be the circuit system of the third device described in the embodiment shown in any one or more of Figures 2, 6 or 8, for implementing the method corresponding to the third device in the above method embodiment. Alternatively, the device 900 may be the circuit system of the second device described in the embodiment shown in any one or more of Figures 2, 6 or 8, for implementing the method corresponding to the second device in the above method embodiment. For example, one circuit system is a chip system.

[0241] The device 900 includes at least one processor 901. Processor 901 can be used for internal processing of the device, implementing certain control processing functions. Optionally, processor 901 includes instructions. Optionally, processor 901 can store data. Optionally, different processors can be independent devices, located in different physical locations, or on different integrated circuits. Optionally, different processors can be integrated into one or more processors, for example, on one or more integrated circuits.

[0242] Optionally, the apparatus 900 includes one or more memories 903 for storing instructions. Optionally, data may also be stored in the memories 903. The processor and memory may be provided separately or integrated together.

[0243] Optionally, the apparatus 900 includes a communication circuit 902 and at least one communication interface 904. Since the memory 903, the communication circuit 902 and the communication interface 904 are all optional, they are indicated by dotted lines in FIG9 .

[0244] Optionally, the device 900 may further include a transceiver and / or an antenna. The transceiver may be used to send information to or receive information from other devices. The transceiver may be referred to as a transceiver, a transceiver circuit, an input / output interface, etc., and is used to implement the transceiver function of the device 900 via the antenna. Optionally, the transceiver includes a transmitter and a receiver. For example, the transmitter may be used to generate a radio frequency signal from a baseband signal, and the receiver may be used to convert the radio frequency signal into a baseband signal.

[0245] The processor 901 may include a general-purpose central processing unit (CPU), a microprocessor, an application specific integrated circuit (ASIC), or one or more integrated circuits for controlling the execution of the program of the present application.

[0246] Communication link 902 may include a pathway for transmitting information between the aforementioned components.

[0247] The communication interface 904 uses any transceiver or other device for communicating with other devices or communication networks, such as Ethernet, radio access network (RAN), wireless local area network (WLAN), wired access network, etc.

[0248] The memory 903 may be a read-only memory (ROM) or other type of static storage device that can store static information and instructions, a random access memory (RAM) or other type of dynamic storage device that can store information and instructions, or an electrically erasable programmable read-only memory (EEPROM), a compact disc read-only memory (CD-ROM) or other optical disc storage, an optical disc storage (including a compact disc, laser disc, optical disc, digital versatile disc, Blu-ray disc, etc.), a magnetic disk storage medium or other magnetic storage device, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and can be accessed by a computer, but is not limited thereto. The memory 903 may exist independently and be connected to the processor 901 via the communication line 902. Alternatively, the memory 903 may be integrated with the processor 901.

[0249] The memory 903 is used to store computer-executable instructions for executing the solution of the present application, and the execution is controlled by the processor 901. The processor 901 is used to execute the computer-executable instructions stored in the memory 903, thereby implementing the steps performed by the first device, the second device, or the third device described in the embodiments shown in any one or more of Figures 2, 6, or 8.

[0250] Optionally, the computer-executable instructions in the embodiments of the present application may also be referred to as application code, which is not specifically limited in the embodiments of the present application.

[0251] In a specific implementation, as an embodiment, the processor 901 may include one or more CPUs, such as CPU0 and CPU1 in FIG. 9 .

[0252] In a specific implementation, as an embodiment, the apparatus 900 may include multiple processors, such as the processor 901 and the processor 905 in FIG9 . Each of these processors may be a single-core (single-CPU) processor or a multi-core (multi-CPU) processor. The processor herein may refer to one or more devices, circuits, and / or processing cores for processing data (e.g., computer program instructions).

[0253] When the device shown in FIG9 is a chip, for example, the first device is the chip, the second device is the chip, or the third device is the chip, or the chip is the chip in the first device, the chip in the second device, or the chip in the third device, then the chip includes a processor 901 (and may also include a processor 905), a communication line 902, and a communication interface 904. Optionally, the chip may include a memory 903. Specifically, the communication interface 904 may be an input interface, a pin, or a circuit. The memory 903 may be a register, a cache, or the like. The processor 901 and the processor 905 may be a general-purpose CPU, a microprocessor, an ASIC, or one or more integrated circuits for controlling the execution of the program of the information transmission method of any of the above embodiments.

[0254] In the embodiment of the present application, the functional modules of the device can be divided according to the above-mentioned method examples. 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-mentioned integrated module can be implemented in the form of hardware or in the form of software functional modules. It should be noted that the division of modules in the embodiment of the present application is schematic and is only a logical function division. There may be other division methods in actual implementation. For example, in the case of dividing each functional module according to each function, Figure 10 is a schematic diagram of a device, and the device 900 can be the first device, the second device, or the third device involved in the above-mentioned various method embodiments, or a chip in the first device, a chip in the second device, or a chip in the third device. The device 900 includes a processing unit 1002 and a transceiver unit 1001.

[0255] It should be understood that the device 900 can be used to implement the steps performed by the first device, the second device, or the third device in the information transmission method of the embodiment of the present application. The relevant features can refer to the embodiments shown in any one or more of Figures 2, 6, or 8 above, and will not be repeated here.

[0256] Optionally, the functions / implementation processes of the transceiver unit 1001 and the processing unit 1002 in FIG10 may be implemented by the processor 901 in FIG9 calling computer-executable instructions stored in the memory 903. Alternatively, the functions / implementation processes of the processing unit 1002 in FIG10 may be implemented by the processor 901 in FIG9 calling computer-executable instructions stored in the memory 903, and the functions / implementation processes of the transceiver unit 1001 in FIG10 may be implemented by the communication interface 904 in FIG9.

[0257] Optionally, when the device 900 is a chip or circuit, the functions / implementation processes of the transceiver unit 1001 may also be implemented via pins or circuits. Optionally, the transceiver unit 1001 may include a transmitting unit and / or a receiving unit, where the transmitting unit is configured to implement the transmitting function and the receiving unit is configured to implement the receiving function. Alternatively, the transceiver unit 1001 may be an integral module capable of implementing the transmitting function and / or the receiving function. Optionally, the transceiver unit 1001 may be implemented via a transceiver.

[0258] The present application also provides a computer-readable storage medium, which stores a computer program or instruction. When the computer program or instruction is executed, the method performed by the first device, the second device, or the third device in the aforementioned method embodiment is implemented. In this way, the functions described in the above embodiments can be implemented in the form of software functional units and sold or used as independent products. Based on this understanding, the technical solution of the present application can essentially or in other words, the part that contributes or the part of the technical solution can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the method described in each embodiment of the present application. The storage medium includes various media that can store program codes, such as a USB flash drive, a mobile hard disk, a ROM, a RAM, a magnetic disk, or an optical disk.

[0259] The present application also provides a computer program product, which includes: computer program code, which, when running on a computer, enables the computer to execute the method executed by the first device, the second device, or the third device in any of the aforementioned method embodiments.

[0260] An embodiment of the present application further provides a processing device, including a processor and an interface; the processor is used to execute the method executed by the first device, the second device, or the third device involved in any of the above method embodiments.

[0261] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware or any combination thereof. When software is used for implementation, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the process or function described in the embodiment of the present application is generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions can be transmitted from one website, computer, server or data center to another website, computer, server or data center via a wired (e.g., coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) method. The computer-readable storage medium can be any available medium that a computer can access or a data storage device such as a server or data center that includes one or more available media integrations. The available medium can be a magnetic medium (e.g., a floppy disk, a hard disk, a tape), an optical medium (e.g., a DVD), or a semiconductor medium (e.g., a solid-state drive (SSD)).

[0262] The various illustrative logic units and circuits described in the embodiments of the present application can be implemented or operated by a general-purpose processor, a digital signal processor (DSP), an ASIC, a field-programmable gate array (FPGA), or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof. The general-purpose processor can be a microprocessor, and optionally, the general-purpose processor can also be any conventional processor, controller, microcontroller or state machine. The processor can also be implemented by a combination of computing devices, such as a digital signal processor and a microprocessor, a plurality of microprocessors, one or more microprocessors in conjunction with a digital signal processor core, or any other similar configuration.

[0263] The steps of the methods or algorithms described in the embodiments of the present application can be directly embedded in hardware, software units executed by a processor, or a combination of the two. The software unit can be stored in RAM, flash memory, ROM, erasable programmable read-only memory (EPROM), EEPROM, registers, hard disks, removable disks, CD-ROMs, or other storage media in any form known in the art. Exemplarily, the storage medium can be connected to the processor so that the processor can read information from the storage medium and write information to the storage medium. Alternatively, the storage medium can also be integrated into the processor. The processor and storage medium can be provided in an ASIC, which can be provided in a terminal device. Alternatively, the processor and storage medium can also be provided in different components in the terminal device.

[0264] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, so that the instructions executed on the computer or other programmable device provide steps for implementing the functions specified in one or more processes in the flowchart and / or one or more boxes in the block diagram.

[0265] The contents of the various embodiments of this application can refer to each other. If there is no special explanation and logical conflict, the terms and / or descriptions between different embodiments are consistent and can be referenced to each other. The technical features in different embodiments can be combined to form new embodiments according to their internal logical relationships.

[0266] It is understood that in the embodiments of the present application, the first device and / or the second device and / or the third device can perform some or all of the steps in the embodiments of the present application. These steps or operations are merely examples. In the embodiments of the present application, other operations or variations of various operations can also be performed. In addition, the various steps can be performed in a different order than those presented in the embodiments of the present application, and it is possible that not all operations in the embodiments of the present application need to be performed.

Claims

1. An information transmission method, characterized in that, Applied to a first device, the method includes: Receiving a first reference signal from a second device; Sending first information, where the first information is obtained by correcting a measurement result of the first reference signal according to a first phase, the first phase being a phase determined according to a first path and a measurement result of the first reference signal, or the first phase being a phase determined according to a measurement result of a third reference signal, the first path being one of one or more paths between the first device and the second device, and the third reference signal being a reference signal for phase correction.

2. The method according to claim 1, wherein The first information includes one or more of the following: A first channel coefficient, Phase information of the one or more paths, Doppler frequency information of the one or more paths, First Doppler spectrum information, or, First autocorrelation function information.

3. The method according to claim 2, wherein The method further includes: Determine that the initial channel coefficient is H according to the measurement result of the first reference signal on the sub-time unit n n and the first phase is θ n ; Determine that the first channel coefficient is:

4. The method according to claim 2, wherein The phase information of the one or more paths is used to indicate: The phase difference of the initial phase of each of the one or more paths relative to the first phase.

5. The method according to any one of claims 1 to 4, characterized in that, The first phase is a phase determined according to the first path, where, The first phase is a phase determined according to a channel coefficient measured after receiving the first reference signal through the first path; or, The first phase is a phase determined according to a channel coefficient of a reference frequency unit measured after receiving the first reference signal through the first path; or, The first phase is a phase determined according to a channel coefficient measured after receiving the first reference signal through the first path and through a reference antenna port and / or a first reference signal port; or, The first phase is a phase determined according to a channel coefficient on a reference frequency unit measured after receiving the first reference signal through the first path and through a reference antenna port and / or a first reference signal port.

6. The method according to any one of claims 1 to 5, characterized in that The first path is the path with the minimum delay among the one or more paths.

7. The method according to any one of claims 1 to 6, characterized in that, The first path is a line-of-sight LoS path between the first device and the second device.

8. The method according to any one of claims 1 to 5, characterized in that, The method further includes: Receiving first indication information; Wherein, the first indication information includes one or more of the following: First delay information, the first delay information being used to indicate the delay of the first path; The index of the first path; or, First precoding vector information or first precoding matrix information, the first precoding vector information or the first precoding matrix information corresponding to the first path.

9. The method according to claim 8, characterized in that Before receiving the first indication information, the method further includes: Receiving a second reference signal from the second device; Sending a first measurement result, the first measurement result being a measurement result of the second reference signal, the first measurement result including one or more of the following: At least one second channel coefficient, At least one first delay power spectrum, At least one first precoding matrix indicator PMI, or, Path information of N paths, the N paths being all or part of the paths between the first device and the second device, and N being a positive integer.

10. The method according to claim 9, wherein The N paths include a second path, and the path information of the second path includes one or more of the following: The index of the second path, The identifier of the second path, The delay information corresponding to the second path, The angle of arrival (AoA) information of the second path, The angle of departure (AoD) information of the second path, or, The line-of-sight (LoS) path information of the second path, where the LoS path information of the second path is used to indicate whether the second path is a LoS path and / or indicate the probability that the second path is a LoS path.

11. The method according to any one of claims 1 to 4, characterized in that The method further includes: Receiving the third reference signal from the second device, where there is an intersection in the time-domain resources occupied by the first reference signal and the third reference signal.

12. The method according to claim 1 to 4 or 11, characterized in that The method further includes: Receiving the third reference signal from the second device, where the time-domain resources occupied by the first reference signal and the third reference signal are completely overlapped.

13. The method according to any one of claims 1 to 4, 11 or 12, characterized in that, The type-D quasi-co-location (QCL) source of the resource for transmitting the first reference signal is different from the type-D QCL source of the resource for transmitting the third reference signal.

14. The method according to any one of claims 1 to 4, 11 to 13, characterized in that The method further includes: Receiving second indication information, where the second indication information indicates that the resource for transmitting the first reference signal and the resource for transmitting the third reference signal are associated, or indicates that the first information is obtained by phase correction based on the measurement result of the third reference signal.

15. The method according to claim 14, characterized in that, The resource for transmitting the first reference signal and the resource for transmitting the third reference signal being associated includes: The first information is obtained by phase correction based on the measurement result of the third reference signal.

16. The method according to any one of claims 1 to 4, 11 to 15, characterized in that, The method further includes: Receiving third indication information, where the third indication information is used to indicate one or more of the following: The transmit beam associated with the first reference signal resource, The receive beam associated with the first reference signal resource, The transmit beam associated with the third reference signal resource, or, The receive beam associated with the third reference signal resource.

17. The method according to any one of claims 1 to 4, 11 to 16, characterized in that, The first phase is the phase determined based on the measurement result of the third reference signal, where The first phase is the phase determined based on the channel coefficient measured after receiving the third reference signal; or, The first phase is the phase determined based on the channel coefficient on the reference frequency unit measured after receiving the third reference signal; or, The first phase is the phase determined based on the channel coefficient measured after receiving the third reference signal through the reference antenna port and / or the first reference signal port; The first phase is the phase determined based on the channel coefficient on the reference frequency unit measured after receiving the third reference signal through the reference antenna port and / or the first reference signal port.

18. An information transmission method, characterized in that, The method includes: Send a first request message to a first device, where the first request message instructs the first device to receive and measure a first reference signal, and instructs the second device to report first information, where the first information is obtained by correcting the measurement result of the first reference signal according to a first phase, the first phase is a phase determined according to a first path and the measurement result of the first reference signal, or the first phase is a phase determined according to the measurement result of a third reference signal, the first path is one of one or more paths between the first device and the second device, and the third reference signal is a reference signal for phase correction.

19. The method according to claim 18, wherein The first information includes one or more of the following: A first channel coefficient, Phase information of the one or more paths, Doppler frequency information of the one or more paths, A first Doppler spectrum information, or, A first autocorrelation function information.

20. The method according to claim 18 or 19, wherein, The first path is the path with the minimum delay among the one or more paths.

21. The method according to any one of claims 18 to 20, characterized in that The first path is the LoS path between the first device and the second device.

22. The method according to any one of claims 18 to 21, characterized in that, The method further includes: Send a first indication message to the first device, the first indication message includes one or more of the following: A first delay information, the first delay information is used to indicate the delay of the first path; An index of the first path; or, A first precoding vector information or a first precoding matrix information, the first precoding vector information or the first precoding matrix information corresponds to the first path.

23. The method according to claim 22, characterized in that, The method further includes: Send a second reference signal to the first device; Receive a first measurement result from the first device, the first measurement result is the measurement result of the second reference signal; the first measurement result includes one or more of the following: At least one second channel coefficient, At least one first delay power spectrum, At least one first PMI, or, Path information of N paths, the N paths are all or part of the paths between the first device and the second device, and N is a positive integer.

24. The method according to claim 23, wherein The N paths include a second path, and the path information of the second path includes one or more of the following: An index of the second path, An identifier of the second path, Delay information corresponding to the second path, AoA information of the second path, AoD information of the departure angle of the second path, or, LoS path information of the second path, where the LoS path information of the second path indicates whether the second path is a LoS path and / or indicates the probability that the second path is a LoS path.

25. The method according to claim 18 or 19, characterized in that, There is an intersection in the time domain resources occupied by the first reference signal and the third reference signal.

26. The method according to claim 25, characterized in that, The time domain resources occupied by the first reference signal and the third reference signal completely overlap.

27. The method according to claim 18, 19, 25 or 26, characterized in that, The type D quasi-co-located QCL source of the resources for transmitting the first reference signal and the type D quasi-co-located QCL source of the resources for transmitting the third reference signal are different.

28. The method according to any one of claims 18, 19, 25 to 27, characterized in that The method further includes: Send second indication information to the first device, where the second indication information indicates that the resources for transmitting the first reference signal are associated with the resources for transmitting the third reference signal, or indicates that the first information is obtained by performing phase correction according to the measurement result of the third reference signal.

29. The method according to claim 18, 19 or 28, characterized in that, The resources for transmitting the first reference signal are associated with the resources for transmitting the third reference signal, including: The first information is obtained by performing phase correction according to the measurement result of the third reference signal.

30. The method according to any one of claims 18, 19, 25 to 28, characterized in that, The method further includes: Send third indication information to the first device, where the third indication information is used to indicate one or more of the following: The transmit beam associated with the first reference signal resource, The receive beam associated with the first reference signal resource, The transmit beam associated with the third reference signal resource, or The receive beam associated with the third reference signal resource.

31. The method according to any one of claims 18 to 30, characterized in that, The method further includes: Send third request information to a second device, where the third request information is used to instruct the second device to send the first reference signal.

32. A device, characterized in that, The device includes a processing unit and a transceiver unit, where the processing unit is coupled to the transceiver unit to perform the method according to any one of claims 1 to 17, or perform the method according to any one of claims 18 to 31.

33. A device, characterized in that, The device includes a processor and a memory, where the memory is used to store a computer program, and the processor is used to execute the computer program stored on the memory, so that the device performs the method according to any one of claims 1 to 17, or so that the device performs the method according to any one of claims 18 to 31.

34. A computer-readable storage medium, characterized in that, The computer-readable storage medium is used to store a computer program, and when the computer program runs on a computer, the computer is caused to perform the method according to any one of claims 1 to 17, or the computer is caused to perform the method according to any one of claims 18 to 31.

35. A computer program product, characterized in that, The computer program product includes a computer program, and when the computer program runs on a computer, the computer is caused to perform the method according to any one of claims 1 to 17, or the computer is caused to perform the method according to any one of claims 18 to 31.

36. A chip system, characterized in that, The chip system includes: A processor and an interface, where the processor is used to call and run instructions from the interface, and when the processor executes the instructions, the method according to any one of claims 1 to 17 is implemented, or the method according to any one of claims 18 to 31 is implemented.

37. A system, characterized in that, Including a first device and a third device, where The first device is used to perform the method according to any one of claims 1 to 17; The third device is used to perform the method according to any one of claims 18 to 31.

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