Channel feedback method, information transmission method and device

Abstract

The present invention provides a channel feedback method, an information transmission method and a device to solve the problem in the prior art that the terminal cannot perform channel estimation and feedback on the reflected channel. The method of the present invention comprises: receiving a Class I reference signal and a Class II reference signal, the Class I reference signal corresponds to a Class I codebook, and the Class II reference signal corresponds to a Class II codebook; based on the Class I reference signal, feedback is given to a codeword selected based on the Class I codebook and a corresponding codebook type; based on the Class II reference signal, feedback is given to a codeword selected based on the Class II codebook and a corresponding codebook type. By introducing a Class II reference signal, the present invention can realize channel estimation and feedback of the reflected channel, thereby accurately reflecting the characteristics of the reflected channel, so that the base station obtains accurate channel information, and provides an accurate basis for the subsequent precoding calculation of the base station side when performing beamforming.

Description

Technical Field

[0001] The present invention relates to the field of wireless communication technology, and in particular to a channel feedback method, an information transmission method and a device. Background Art

[0002] Smart reflectors are a new type of intelligent passive surface that uses meta-materials to control the phase of the surface in real time, thereby controlling the reflection angle of the incident wave and forming reflection beams in different directions. Smart reflectors have the characteristics of low cost and low power consumption, so they can forward signals without complex radio frequency (RF) circuits.

[0003] In the existing system, the terminal estimates only the channel from the base station to the terminal. Even in the integrated relay / access backhaul (IAB) system, the terminal estimates the separate relay-to-terminal channel. In the intelligent reflective surface system, the terminal can only estimate the channel after the signal is reflected by the surface, and its channel characteristics and structure are quite different from those of the general transmitting node-receiving node channel. In the existing technology, the terminal cannot perform channel estimation and feedback on the reflected channel. Summary of the invention

[0004] The object of the present invention is to provide a channel feedback method, an information transmission method and a device, which are used to solve the problem in the prior art that a terminal cannot perform channel estimation and feedback on a reflection channel.

[0005] In order to achieve the above object, the present invention provides a channel feedback method, which is applied to a terminal and includes:

[0006] receiving a class I reference signal and a class II reference signal, wherein the class I reference signal corresponds to a class I codebook, and the class II reference signal corresponds to a class II codebook;

[0007] Based on the I-type reference signal, feeding back a codeword selected based on the I-type codebook and a corresponding codebook type;

[0008] Based on the Class II reference signal, a codeword selected based on the Class II codebook and a corresponding codebook type are fed back.

[0009] The type I reference signal is one of a reference signal when there is no node device and a reference signal when the node device parameters are not adjusted;

[0010] The type II reference signal is one of a reference signal when a node device is present and a reference signal when a node device parameter is adjusted, and the node device has a function of reflecting a signal or forwarding a reflected signal.

[0011] Wherein, the method further comprises:

[0012] Configuration information of the Class II reference signal and a Class II codebook corresponding to the Class II reference signal are received.

[0013] The phase and / or amplitude of the node device is configured by a base station or determined by the node device.

[0014] Wherein, the method further comprises:

[0015] Acquire channel state information and / or location related information of the terminal, the channel state information is obtained by the type I reference signal, and the location related information includes geographical location information and / or receiving angle;

[0016] Report target information to a base station so that the base station determines, based on the target information and uplink measurement information, that the distance between the terminal and the node device is within a preset range and then sends a Class II reference signal; or, based on the target information, determines that the distance between the terminal and the node device is within a preset range and then sends a first request to the base station, wherein the first request is used to request the base station to send a Class II reference signal, and the target information includes the channel state information and / or the position-related information.

[0017] The feeding back, based on the Class II reference signal, a codeword selected based on a Class II codebook and a corresponding codebook type, includes:

[0018] A Class II reference signal configuration parameter is obtained, where the Class II reference signal configuration parameter includes: multiple parameter adjustments, and different time domain positions corresponding to different parameters.

[0019] The method of feeding back a codeword selected based on a type II codebook and a corresponding codebook type based on the type II reference signal further includes:

[0020] Based on the configuration parameters of the Class II reference signal, a channel estimated by a Class II reference signal configured according to a first parameter at a first time domain position is subtracted from a channel estimated by a Class II reference signal configured according to a second parameter at a second time domain position to obtain an equivalent channel, and the first parameter configuration and the second parameter configuration are different.

[0021] The method of feeding back a codeword selected based on a type II codebook and a corresponding codebook type based on the type II reference signal further includes:

[0022] Based on the Class II codebook, the equivalent channel is quantized and estimated to obtain a codeword selected based on the Class II codebook, and the codeword selected based on the Class II codebook and the corresponding codebook type are fed back to the base station.

[0023] Wherein, the method further comprises:

[0024] The receiving node device adjusts the phase and / or amplitude of the reflected service signal based on the configuration information during service transmission, where the configuration information is configured by the base station based on the codeword selected by the type II codebook and the corresponding codebook type.

[0025] The present invention also provides an information transmission method, applied to a base station, comprising:

[0026] Sending a class I reference signal and a class II reference signal, wherein the class I reference signal corresponds to a class I codebook, and the class II reference signal corresponds to a class II codebook;

[0027] Receiving a codeword selected based on a type I codebook and a corresponding codebook type;

[0028] A codeword selected based on a Class II codebook and a corresponding codebook type are received.

[0029] The type I reference signal is one of a reference signal when there is no node device and a reference signal when the node device parameters are not adjusted;

[0030] The type II reference signal is one of a reference signal when a node device is present and a reference signal when a node device parameter is adjusted, and the node device has a function of reflecting a signal or forwarding a reflected signal.

[0031] The sending of a type II reference signal includes:

[0032] When the preset conditions are met, a Class II reference signal is sent;

[0033] The preset condition includes one of the following conditions:

[0034] Determine, based on uplink measurement information and channel state information and / or location related information reported by the terminal, that the distance between the terminal and the node device is within a preset range, wherein the location related information includes geographic location information and / or a receiving angle;

[0035] A first request sent by a terminal is received, where the first request is used to request the base station to send a Class II reference signal.

[0036] Wherein, the method further comprises:

[0037] Sending a Class II reference signal configuration parameter and a Class II codebook corresponding to the Class II reference signal to the terminal;

[0038] Sending Class II reference signal configuration parameters and phase and / or amplitude configuration information of the node device to the node device;

[0039] The Class II reference signal configuration parameters include: multiple parameter adjustments, and different time domain positions corresponding to different parameters.

[0040] Wherein, the method further comprises:

[0041] According to the codeword selected based on the Class II codebook and the corresponding codebook type, a channel matrix is ​​obtained;

[0042] Perform precoding processing according to the channel matrix to obtain a first result;

[0043] Based on the first result, configure the phase and / or amplitude configuration information corresponding to the service transmission and the transmission resources corresponding to the phase and / or amplitude configuration information for the node device;

[0044] A service signal is sent, and the service signal is reflected by the node device on the transmission resource using the phase and / or amplitude configuration information.

[0045] The present invention also provides an information transmission method, which is applied to a node device, wherein the node device has a function of reflecting a signal or forwarding a reflected signal, and comprises:

[0046] Class II reference signal configuration parameters and node device phase and / or amplitude configuration information are received, wherein the Class II reference signal configuration parameters include: multiple parameter adjustments, and different time domain positions corresponding to different parameters.

[0047] Wherein, the method further comprises:

[0048] Report the available phase to the base station.

[0049] Wherein, the method further comprises:

[0050] Acquire the phase and / or amplitude configuration information corresponding to the service transmission and the transmission resource corresponding to the phase and / or configuration information, wherein the phase and / or amplitude configuration information is configured by a codeword selected by the base station based on a Class II codebook and a corresponding codebook type, and the Class II codebook corresponds to a Class II reference signal.

[0051] Wherein, the method further comprises:

[0052] On the transmission resource corresponding to the phase and / or amplitude configuration information, the service signal from the base station is reflected after adjusting the phase based on the phase and / or amplitude configuration information.

[0053] The present invention also provides a channel feedback device, comprising:

[0054] A first receiving module, configured to receive a type I reference signal and a type II reference signal, wherein the type I reference signal corresponds to a type I codebook, and the type II reference signal corresponds to a type II codebook;

[0055] A first feedback module, configured to feed back a codeword selected based on a type I codebook and a corresponding codebook type based on the type I reference signal;

[0056] The second feedback module is configured to feed back a codeword selected based on a type II codebook and a corresponding codebook type based on the type II reference signal.

[0057] The type I reference signal is one of a reference signal when there is no node device and a reference signal when the node device parameters are not adjusted;

[0058] The type II reference signal is one of a reference signal when a node device is present and a reference signal when a node device parameter is adjusted, and the node device has a function of reflecting a signal or forwarding a reflected signal.

[0059] Wherein, the channel feedback device further comprises:

[0060] The second receiving module is configured to receive configuration information of the Class II reference signal and a Class II codebook corresponding to the Class II reference signal.

[0061] The phase and / or amplitude of the node device is configured by a base station or determined by the node device.

[0062] Wherein, the channel feedback device further comprises:

[0063] A first acquisition module, configured to acquire channel state information and / or location-related information of a terminal, wherein the channel state information is obtained from the Class I reference signal, and the location-related information includes geographical location information and / or a receiving angle;

[0064] A first sending module is used to report target information to a base station, so that the base station sends a Class II reference signal when it determines, based on the target information and uplink measurement information, that the distance between the terminal and the node device is within a preset range; or, when it is determined, based on the target information, that the distance between the terminal and the node device is within a preset range, a first request is sent to the base station, wherein the first request is used to request the base station to send a Class II reference signal, and the target information includes the channel state information and / or the position-related information.

[0065] Wherein, the second feedback module includes:

[0066] The first acquisition unit is used to acquire Class II reference signal configuration parameters, where the Class II reference signal configuration parameters include: multiple parameter adjustments, and different time domain positions corresponding to different parameters.

[0067] Wherein, the second feedback module further includes:

[0068] A first calculation unit is used to subtract a channel estimated by a Class II reference signal configured according to a first parameter at a first time domain position from a channel estimated by a Class II reference signal configured according to a second parameter at a second time domain position based on the Class II reference signal configuration parameters, to obtain an equivalent channel, wherein the first parameter configuration and the second parameter configuration are different.

[0069] Wherein, the second feedback module further includes:

[0070] The channel estimation unit is used to perform quantization estimation on the equivalent channel based on the Class II codebook, obtain the codeword selected based on the Class II codebook, and feed back the codeword selected based on the Class II codebook and the corresponding codebook type to the base station.

[0071] Wherein, the channel feedback device further comprises:

[0072] The third receiving module is used to receive the service signal reflected after the node device adjusts the phase and / or amplitude based on the configuration information during service transmission, and the configuration information is configured by the base station based on the codeword selected by the type II codebook and the corresponding codebook type.

[0073] The present invention also provides a terminal, comprising a processor and a transceiver, wherein the processor is configured to execute the following process:

[0074] Receiving, by the transceiver, a type I reference signal and a type II reference signal, wherein the type I reference signal corresponds to a type I codebook, and the type II reference signal corresponds to a type II codebook;

[0075] Based on the I-type reference signal, feeding back a codeword selected based on the I-type codebook and a corresponding codebook type;

[0076] Based on the Class II reference signal, a codeword selected based on the Class II codebook and a corresponding codebook type are fed back.

[0077] The type I reference signal is one of a reference signal when there is no node device and a reference signal when the node device parameters are not adjusted;

[0078] The type II reference signal is one of a reference signal when a node device is present and a reference signal when a node device parameter is adjusted, and the node device has a function of reflecting a signal or forwarding a reflected signal.

[0079] Wherein, the transceiver is also used for:

[0080] Configuration information of the Class II reference signal and a Class II codebook corresponding to the Class II reference signal are received.

[0081] The phase and / or amplitude of the node device is configured by a base station or determined by the node device.

[0082] Wherein, the processor is further used for:

[0083] Acquire channel state information and / or location related information of the terminal, the channel state information is obtained by the type I reference signal, and the location related information includes geographical location information and / or receiving angle;

[0084] The transceiver reports the target information to the base station, so that the base station determines, based on the target information and the uplink measurement information, that the distance between the terminal and the node device is within a preset range and then sends a Class II reference signal; or, based on the target information, determines that the distance between the terminal and the node device is within a preset range, a first request is sent to the base station, wherein the first request is used to request the base station to send a Class II reference signal, and the target information includes the channel state information and / or the position-related information.

[0085] Wherein, the processor is further used for:

[0086] Configuration parameters of a Class II reference signal are obtained, where the configuration parameters of the Class II reference signal include: multiple parameter adjustments, and different time domain positions corresponding to different parameters.

[0087] Wherein, the processor is further used for:

[0088] Based on the configuration parameters of the Class II reference signal, a channel estimated by a Class II reference signal configured according to a first parameter at a first time domain position is subtracted from a channel estimated by a Class II reference signal configured according to a second parameter at a second time domain position to obtain an equivalent channel, and the first parameter configuration and the second parameter configuration are different.

[0089] Wherein, the processor is further used for:

[0090] Based on the Class II codebook, the equivalent channel is quantized and estimated to obtain a codeword selected based on the Class II codebook, and the codeword selected based on the Class II codebook and the corresponding codebook type are fed back to the base station.

[0091] Wherein, the transceiver is also used for:

[0092] The receiving node device adjusts the phase and / or amplitude of the reflected service signal based on the configuration information during service transmission, where the configuration information is configured by the base station based on the codeword selected by the type II codebook and the corresponding codebook type.

[0093] The present invention also provides a terminal, comprising a memory, a processor, and a program stored in the memory and executable on the processor; when the processor executes the program, the channel feedback method as described above is implemented.

[0094] The present invention also provides a channel transmission device, comprising:

[0095] A second sending module, configured to send a type I reference signal and a type II reference signal, wherein the type I reference signal corresponds to a type I codebook, and the type II reference signal corresponds to a type II codebook;

[0096] A fourth receiving module, configured to receive a codeword selected based on the type I codebook and a corresponding codebook type;

[0097] The fifth receiving module is configured to receive a codeword selected based on the type II codebook and a corresponding codebook type.

[0098] The type I reference signal is one of a reference signal when there is no node device and a reference signal when the node device parameters are not adjusted;

[0099] The type II reference signal is one of a reference signal when a node device is present and a reference signal when a node device parameter is adjusted, and the node device has a function of reflecting a signal or forwarding a reflected signal.

[0100] The second sending module may include:

[0101] A first sending unit, configured to send a Class II reference signal when a preset condition is met;

[0102] The preset condition includes one of the following conditions:

[0103] Determine, based on uplink measurement information and channel state information and / or location related information reported by the terminal, that the distance between the terminal and the node device is within a preset range, wherein the location related information includes geographic location information and / or a receiving angle;

[0104] A first request sent by a terminal is received, where the first request is used to request the base station to send a Class II reference signal.

[0105] Wherein, the information transmission device further includes:

[0106] A third sending module, configured to send a Class II reference signal configuration parameter and a Class II codebook corresponding to the Class II reference signal to a terminal;

[0107] A fourth sending module, used to send Class II reference signal configuration parameters and phase and / or amplitude configuration information of the node device to the node device;

[0108] The Class II reference signal configuration parameters include: multiple parameter adjustments, and different time domain positions corresponding to different parameters.

[0109] Wherein, the information transmission device further includes:

[0110] A first processing module, configured to obtain a channel matrix according to a codeword selected based on a Class II codebook and a corresponding codebook type;

[0111] A second processing module, configured to perform precoding processing according to the channel matrix to obtain a first result;

[0112] A configuration module, configured to configure, for the node device, phase and / or amplitude configuration information corresponding to service transmission and transmission resources corresponding to the phase and / or amplitude configuration information based on the first result;

[0113] The fifth sending module is used to send a service signal, and the service signal is reflected by the node device on the transmission resource using the phase and / or amplitude configuration information.

[0114] The present invention also provides a base station, comprising a processor and a transceiver, wherein the transceiver receives and sends data under the control of the processor, and the processor is used to perform the following operations:

[0115] Sending a type I reference signal and a type II reference signal by the transceiver, the type I reference signal corresponds to a type I codebook, and the type II reference signal corresponds to a type II codebook;

[0116] Receiving a codeword selected based on a type I codebook and a corresponding codebook type;

[0117] A codeword selected based on a Class II codebook and a corresponding codebook type are received.

[0118] The type I reference signal is one of a reference signal when there is no node device and a reference signal when the node device parameters are not adjusted;

[0119] The type II reference signal is one of a reference signal when a node device is present and a reference signal when a node device parameter is adjusted, and the node device has a function of reflecting a signal or forwarding a reflected signal.

[0120] Wherein, the transceiver is also used for:

[0121] When the preset conditions are met, a Class II reference signal is sent;

[0122] The preset condition includes one of the following conditions:

[0123] Determine, based on uplink measurement information and channel state information and / or location related information reported by the terminal, that the distance between the terminal and the node device is within a preset range, wherein the location related information includes geographic location information and / or a receiving angle;

[0124] A first request sent by a terminal is received, where the first request is used to request the base station to send a Class II reference signal.

[0125] Wherein, the transceiver is also used for:

[0126] Sending a Class II reference signal configuration parameter and a Class II codebook corresponding to the Class II reference signal to the terminal;

[0127] Sending Class II reference signal configuration parameters and phase and / or amplitude configuration information of the node device to the node device;

[0128] The Class II reference signal configuration parameters include: multiple parameter adjustments, and different time domain positions corresponding to different parameters.

[0129] Wherein, the processor is further used for:

[0130] According to the codeword selected based on the Class II codebook and the corresponding codebook type, a channel matrix is ​​obtained;

[0131] Perform precoding processing according to the channel matrix to obtain a first result;

[0132] Based on the first result, configure the phase and / or amplitude configuration information corresponding to the service transmission and the transmission resources corresponding to the phase and / or amplitude configuration information for the node device;

[0133] The service signal is sent through the transceiver, and the service signal is reflected by the node device on the transmission resource using the phase and / or amplitude configuration information.

[0134] The present invention also provides a base station, comprising a memory, a processor, and a program stored in the memory and executable on the processor; when the processor executes the program, the information transmission method as described above is implemented.

[0135] The present invention also provides an information transmission device, comprising:

[0136] The sixth receiving module is used to receive Class II reference signal configuration parameters and node device phase and / or amplitude configuration information, wherein the Class II reference signal configuration parameters include: multiple parameter adjustments, and different time domain positions corresponding to different parameters.

[0137] Wherein, the information transmission device further includes:

[0138] The sixth sending module is used to report the available phase to the base station.

[0139] Wherein, the information transmission device further includes:

[0140] The second acquisition module is used to obtain the phase and / or amplitude configuration information corresponding to the service transmission and the transmission resources corresponding to the phase and / or configuration information, wherein the phase and / or amplitude configuration information is configured by a codeword selected by the base station based on a Class II codebook and a corresponding codebook type, and the Class II codebook corresponds to a Class II reference signal.

[0141] Wherein, the information transmission device further includes:

[0142] The first reflection module is used to reflect the service signal from the base station after adjusting the phase based on the phase and / or amplitude configuration information on the transmission resource corresponding to the phase and / or amplitude configuration information.

[0143] The present invention also provides a node device, the node device having a function of reflecting a signal or forwarding a reflected signal, comprising a processor and a transceiver, the processor being configured to execute the following process:

[0144] The transceiver receives Class II reference signal configuration parameters and node device phase and / or amplitude configuration information, wherein the Class II reference signal configuration parameters include: multiple parameter adjustments, and different time domain positions corresponding to different parameters.

[0145] Wherein, the transceiver is also used for:

[0146] Report the available phase to the base station.

[0147] Wherein, the processor is further used for:

[0148] Acquire the phase and / or amplitude configuration information corresponding to the service transmission and the transmission resource corresponding to the phase and / or configuration information, wherein the phase and / or amplitude configuration information is configured by a codeword selected by the base station based on a Class II codebook and a corresponding codebook type, and the Class II codebook corresponds to a Class II reference signal.

[0149] Wherein, the processor is further used for:

[0150] On the transmission resource corresponding to the phase and / or amplitude configuration information, the service signal from the base station is reflected after adjusting the phase based on the phase and / or amplitude configuration information.

[0151] The present invention also provides a node device, comprising a memory, a processor, and a program stored in the memory and executable on the processor; when the processor executes the program, the information transmission method as described above is implemented.

[0152] The present invention also provides a computer-readable storage medium on which a computer program is stored. When the program is executed by a processor, the steps in the channel feedback method described above or the steps in the information transmission method described above are implemented.

[0153] The above technical solution of the present invention has at least the following beneficial effects:

[0154] In an embodiment of the present invention, by receiving a Class I reference signal and a Class II reference signal, the Class I reference signal corresponds to a Class I codebook, and the Class II reference signal corresponds to a Class II codebook; based on the Class I reference signal, a codeword selected based on the Class I codebook and a corresponding codebook type are fed back; based on the Class II reference signal, a codeword selected based on the Class II codebook and a corresponding codebook type are fed back. In this way, by introducing the Class II reference signal, channel estimation and feedback of the reflected channel can be achieved, thereby accurately reflecting the characteristics of the reflected channel, so that the base station obtains accurate channel information, and provides an accurate basis for the subsequent precoding calculation of the base station side when performing beamforming. BRIEF DESCRIPTION OF THE DRAWINGS

[0155] Figure 1 A schematic diagram showing a transmission model of a smart reflective surface;

[0156] Figure 2 A schematic diagram showing a flow chart of a channel feedback method according to an embodiment of the present invention;

[0157] Figure 3 A schematic diagram showing a flow chart of a method for acquiring channel information according to an embodiment of the present invention;

[0158] Figure 4 A schematic diagram showing a flow chart of a signal reflection method according to an embodiment of the present invention;

[0159] Figure 5 A schematic diagram showing the process interaction between a terminal, a reflector and a base station according to an embodiment of the present invention;

[0160] Figure 6 A schematic diagram showing a time domain pattern of a Class II reference signal;

[0161] Figure 7 A schematic diagram showing a module of a channel feedback device according to an embodiment of the present invention;

[0162] Figure 8 A schematic diagram showing a module of a channel information acquisition device according to an embodiment of the present invention;

[0163] Fig. 9 A schematic diagram showing a module of a signal reflection device according to an embodiment of the present invention;

[0164] Fig.10 A schematic diagram showing the structure of a terminal according to an embodiment of the present invention;

[0165] Fig.11 A schematic diagram showing the structure of a base station according to an embodiment of the present invention;

[0166] Fig.12 A schematic structural diagram of a reflector according to an embodiment of the present invention is shown. DETAILED DESCRIPTION

[0167] In order to make the technical problems, technical solutions and advantages to be solved by the present invention more clear, a detailed description will be given below with reference to the accompanying drawings and specific embodiments.

[0168] The present invention aims at the problem in the prior art that a terminal cannot perform channel estimation and feedback on a reflection channel, and provides a channel feedback method, a channel information acquisition method, a signal reflection method and a device.

[0169] In order to enable those skilled in the art to better understand the method of the embodiment of the present invention, the following description is first given. Figure 1 The figure shows the transmission model of the intelligent reflective surface. After the signal is reflected by the reflector 1, it will be reflected by the direct link h. d They are superimposed on the terminal side to form an equivalent channel.

[0170] The reflection coefficient of the mth array of the reflector is Where M is the number of reflectors, γ m is the reflection amplitude, θ m is the phase shift.

[0171] The received signal of a single-antenna terminal can be expressed as:

[0172]

[0173] Among them, the specific form of the equivalent channel in the brackets is:

[0174]

[0175] It should be noted that represents the channel matrix of the direct link between the kth terminal and the base station; x can be a known reference signal or a signal sent by an unknown base station; represents the channel matrix between the kth terminal and the reflector; F represents the channel matrix between the base station and the reflector.

[0176] The received signal of the multi-antenna terminal can be expressed as:

[0177]

[0178] Among them, the specific form of the equivalent channel in the brackets is:

[0179]

[0180] Since there is generally no RF link on the reflector, when forwarding the signal, the terminal can only obtain a cascaded equivalent channel. or H k +G k ΓF, however, when performing beamforming, the base station needs to obtain channel information for precoding calculation. Unlike traditional relays, reflectors cannot actively transmit signals for channel estimation, so how to obtain G and F in the equivalent channel is an important issue that needs to be solved in reflector communications.

[0181] Since the phase of each array on the reflector can be adjusted, the simplest channel estimation method is to adjust the phase of the reflector multiple times, and the terminal will receive the equivalent channel twice. or H k +G k After subtracting ΓF, the channel estimation is performed. Here, it is assumed that the channel is slowly changing during the reference signal transmission process, so the cascade channel can be obtained after subtracting or The estimated value of the cascaded channel can be obtained because the phase is known or

[0182] If the transmission is carried out according to the existing communication process between the base station and the terminal (the base station sends a reference signal, the terminal estimates the channel, the terminal performs channel feedback, and the base station performs precoding calculation and scheduling), during this process, the reflector needs to perform multiple phase adjustments to allow the terminal to perform multiple channel estimates. The phase control of the reflector should be consistent with the transmission format of the reference signal. Currently, there is no solution for the phase control of the reflector, and the relationship between the phase control solution and the reference signal has not yet been designed.

[0183] In addition to the lack of the above phase control scheme, according to the existing process, the terminal can only feedback or H k +G k In the existing system, the terminal estimates only the channel from the base station to the terminal. or H k , even in the integrated relay / access backhaul (IAB) system, the terminal estimates the individual relay-terminal channel F. In the intelligent reflecting surface system, the terminal can only estimate the channel after the signal is reflected by the surface, and its channel characteristics and structure are quite different from those of the general transmitting node-receiving node channel. Therefore, if the terminal only quantizes and estimates the equivalent channel according to the current codebook format and then feeds it back, it is difficult to accurately reflect the characteristics of the reflection link channel.

[0184] Based on this, Figure 2 As shown, an embodiment of the present invention provides a channel feedback method, which is applied to a terminal and includes:

[0185] Step 201: receiving a type I reference signal and a type II reference signal, wherein the type I reference signal corresponds to a type I codebook, and the type II reference signal corresponds to a type II codebook.

[0186] Here, optionally, the type I reference signal is one of a reference signal when there is no node device and a reference signal when a node device parameter is not adjusted;

[0187] The type II reference signal is one of a reference signal when a node device is present and a reference signal when a node device parameter is adjusted, and the node device has a function of reflecting a signal or forwarding a reflected signal.

[0188] Here, the node device may be a reflection plate.

[0189] Here, the Type II reference signal is used for channel estimation in the reflector communication system.

[0190] It should be noted that the Class II reference signal may be a Channel State Information-Reference Signal (CSI-RS). Here, the CSI-RS is used as a Class II reference signal and is used for channel estimation in a reflector communication system.

[0191] It should be noted that the type II codebook corresponding to the type II reference signal is a codebook matching the reflection channel.

[0192] Step 202: Based on the Class I reference signal, feedback is given of a codeword selected based on the Class I codebook and a corresponding codebook type;

[0193] It should be noted that the Class I reference signal may include a synchronization signal, a CSI-RS, and the like.

[0194] Step 203: Based on the Class II reference signal, a codeword selected based on the Class II codebook and a corresponding codebook type are fed back.

[0195] The channel feedback method of an embodiment of the present invention receives a Class I reference signal and a Class II reference signal, wherein the Class I reference signal corresponds to a Class I codebook, and the Class II reference signal corresponds to a Class II codebook; based on the Class I reference signal, a codeword selected based on the Class I codebook and a corresponding codebook type are fed back; based on the Class II reference signal, a codeword selected based on the Class II codebook and a corresponding codebook type are fed back. In this way, by introducing a Class II reference signal, channel estimation and feedback of the reflected channel can be achieved, thereby accurately reflecting the characteristics of the reflected channel, so that the base station obtains accurate channel information, and provides an accurate basis for the subsequent precoding calculation of the base station side when performing beamforming.

[0196] As an optional implementation, the method of the embodiment of the present invention may further include:

[0197] Configuration information of the Class II reference signal and a Class II codebook corresponding to the Class II reference signal are received.

[0198] Here, the configuration information of the Class II reference signal includes at least but is not limited to: the transmission resources for transmitting the Class II reference signal (such as the time-frequency position corresponding to the transmission of the Class II reference signal), the correspondence between the Class II reference signal and the transmission resources, such as which reference signals on which symbols correspond to the same parameters.

[0199] It should be noted that the configuration information of the Class II reference signal and the Class II codebook corresponding to the Class II reference signal are configured by the base station. Specifically, the terminal receives the configuration information of the Class II reference signal sent by the base station, and receives the Class II reference signal sent by the base station and reflected by the reflector through the configuration information.

[0200] Optionally, the phase and / or amplitude of the node device is configured by a base station or determined by the node device.

[0201] Specifically, the phase and / or amplitude of the reflector is configured by the base station or determined by the reflector.

[0202] It should be noted that the type II reference signal is reflected by the node device at the phase of the node device. Here, the number of phases of the node device is greater than or equal to 2.

[0203] As an optional implementation, the method of the embodiment of the present invention may further include:

[0204] Acquire channel state information and / or location related information of the terminal, the channel state information is obtained by the type I reference signal, and the location related information includes geographical location information and / or receiving angle;

[0205] In this step, specifically, the terminal performs channel measurement according to the type I reference signal to obtain the channel state information of the terminal.

[0206] Here, the location-related information may be obtained by the terminal using existing information, or may be obtained by the base station based on signal status information reported by the terminal, measurement information of the base station, and deployment information.

[0207] Report target information to a base station so that the base station determines, based on the target information and uplink measurement information, that the distance between the terminal and the node device is within a preset range and then sends a Class II reference signal; or, based on the target information, determines that the distance between the terminal and the node device is within a preset range and then sends a first request to the base station, wherein the first request is used to request the base station to send a Class II reference signal, and the target information includes the channel state information and / or the position-related information.

[0208] Here, the terminal can report the target information to the base station. The base station determines whether the terminal is located near a node device (such as a reflector) based on the target information and uplink measurement information. If so, the base station needs to send a Class II reference signal for reflection channel estimation. Otherwise, no processing is performed.

[0209] Optionally, the terminal can determine whether it is located near a node device (such as a reflector) based on the obtained target information; if so, the base station is triggered to send a Class II reference signal for reflection channel estimation; otherwise, no processing is performed.

[0210] Here, if the target information is geographic location information, the base station can determine whether the terminal is located near the node device based on the geographic location of the terminal reported by the terminal and the location of the node device (such as a reflector).

[0211] If the target information is the receiving angle, the base station compares the receiving angle of the Class I reference signal reported by the terminal with the position of the node device (such as a reflector) to obtain the position of the terminal relative to the node device, thereby determining whether the terminal is near the node device.

[0212] If the target information is channel state information, the base station can obtain the possible location of the terminal based on the channel strength reported by the terminal and the location of the existing base station and node equipment (such as a reflector), and can determine whether the terminal is near the node equipment.

[0213] As an optional implementation, step 203 of the method in the embodiment of the present invention may include:

[0214] A Class II reference signal configuration parameter is obtained, where the Class II reference signal configuration parameter includes: multiple parameter adjustments, and different time domain positions corresponding to different parameters.

[0215] Here, the parameters involved in the Class II reference signal configuration parameters in this step specifically refer to phase. Specifically, each configured phase may be one phase corresponding to one time domain position, or multiple phases corresponding to one time domain position. The configured phase may be represented in vector form.

[0216] Furthermore, step 203 of the method of the embodiment of the present invention may also include:

[0217] Based on the Class II reference signal configuration parameters, a channel estimated by a Class II reference signal configured according to a first parameter at a first time domain position is subtracted from a channel estimated by a Class II reference signal configured according to a second parameter at a second time domain position to obtain an equivalent channel, and the first parameter configuration and the second parameter configuration are different.

[0218] In one example, the reflector adjusts its phase at multiple RS transmission positions, and it can be obtained that, at the i-th adjustment, the terminal / base station can obtain an estimated value of the equivalent channel, that is:

[0219]

[0220] H k +G k ΓF=A i

[0221] Subtracting the two equivalent channels, we can get:

[0222]

[0223]

[0224] It can be seen that this process eliminates the influence of the direct-line path and obtains the channel estimation of the pure reflection link.

[0225] Furthermore, step 203 of the method of the embodiment of the present invention may also include:

[0226] Based on the Class II codebook, the equivalent channel is quantized and estimated to obtain a codeword selected based on the Class II codebook, and the codeword selected based on the Class II codebook and the corresponding codebook type are fed back to the base station.

[0227] In this step, since the characteristics of the reflection link are different from those of the direct link, when feedback is given, the Class II codebook is selected for feedback according to the configuration of the base station. The channel feedback information includes a codeword selected based on the Class II codebook (for example, a precoding matrix index PMI) and a corresponding codebook type, in order to enable the base station to distinguish which type of codebook the currently fed back codeword is based on.

[0228] As an optional implementation, the method of the embodiment of the present invention may further include:

[0229] The receiving node device adjusts the phase and / or amplitude of the reflected service signal based on the configuration information during service transmission, where the configuration information is configured by the base station based on the codeword selected by the type II codebook and the corresponding codebook type.

[0230] Here, since the channel feedback information takes into account the characteristics of the reflection link channel, the configuration information configured by the base station based on the channel feedback information is more accurate in terms of the phase and / or amplitude of the node device. The reflected service signal is adjusted using the configuration information to adjust the phase and / or amplitude, which can enhance the signal strength, reduce interference between users, and improve system capacity.

[0231] The channel feedback method of an embodiment of the present invention receives a Class I reference signal and a Class II reference signal, wherein the Class I reference signal corresponds to a Class I codebook, and the Class II reference signal corresponds to a Class II codebook; based on the Class I reference signal, a codeword selected based on the Class I codebook and a corresponding codebook type are fed back; based on the Class II reference signal, a codeword selected based on the Class II codebook and a corresponding codebook type are fed back. In this way, by introducing a Class II reference signal, channel estimation and feedback of the reflected channel can be achieved, thereby accurately reflecting the characteristics of the reflected channel, so that the base station obtains accurate channel information, and provides an accurate basis for the subsequent precoding calculation of the base station side when performing beamforming.

[0232] like Figure 3 As shown, an embodiment of the present invention further provides an information transmission method, which is applied to a base station and includes:

[0233] Step 301, sending a type I reference signal and a type II reference signal, wherein the type I reference signal corresponds to a type I codebook, and the type II reference signal corresponds to a type II codebook;

[0234] Here, optionally, the type I reference signal is one of a reference signal when there is no node device and a reference signal when a node device parameter is not adjusted;

[0235] The type II reference signal is one of a reference signal when a node device is present and a reference signal when a node device parameter is adjusted, and the node device has a function of reflecting a signal or forwarding a reflected signal.

[0236] Here, the node device may be a reflection plate.

[0237] Here, the Type II reference signal is used for channel estimation in the reflector communication system.

[0238] It should be noted that the Class II reference signal may be a Channel State Information-Reference Signal (CSI-RS). Here, the CSI-RS is used as a Class II reference signal and is used for channel estimation in a reflector communication system.

[0239] It should be noted that the type II codebook corresponding to the type II reference signal is a codebook matching the reflection channel.

[0240] Here, the purpose of sending a Class I reference signal to the terminal is to enable the terminal to perform channel measurement based on the Class I reference signal and report channel state information, thereby determining whether the terminal is located near a node device, and sending a Class II reference signal when the terminal is located near a node device.

[0241] As an optional implementation, sending a type II reference signal includes:

[0242] When the preset conditions are met, a Class II reference signal is sent;

[0243] The preset condition includes one of the following conditions:

[0244] Determine, based on uplink measurement information and channel state information and / or location related information reported by the terminal, that the distance between the terminal and the node device is within a preset range, wherein the location related information includes geographic location information and / or a receiving angle;

[0245] A first request sent by a terminal is received, where the first request is used to request the base station to send a Class II reference signal.

[0246] Here, the specific implementation steps for determining that the distance between the terminal and the node device (such as a reflector) is within a preset range based on the channel state information and / or location-related information reported by the terminal have been described in the method embodiment on the terminal side and will not be repeated here.

[0247] Step 302, receiving a codeword selected based on a type I codebook and a corresponding codebook type;

[0248] It should be noted that the Class I reference signal may include a synchronization signal, a CSI-RS, and the like.

[0249] Here, specifically, a codeword selected based on a type I codebook and a corresponding codebook type fed back by the terminal are received.

[0250] Step 303: receiving a codeword selected based on a Class II codebook and a corresponding codebook type.

[0251] Here, specifically, a codeword selected based on a type II codebook and a corresponding codebook type fed back by the terminal are received.

[0252] The information transmission method of the embodiment of the present invention sends a Class I reference signal and a Class II reference signal, wherein the Class I reference signal corresponds to a Class I codebook, and the Class II reference signal corresponds to a Class II codebook; receives a codeword selected based on the Class I codebook and a corresponding codebook type; receives a codeword selected based on the Class II codebook and a corresponding codebook type, so that the codeword selected based on the Class II codebook and the corresponding codebook type that can accurately reflect the channel characteristics are fed back by the terminal. Based on this, the base station can obtain accurate channel information, thereby providing an accurate basis for its subsequent precoding calculation during beamforming.

[0253] As an optional implementation, the method further includes:

[0254] Sending a Class II reference signal configuration parameter and a Class II codebook corresponding to the Class II reference signal to the terminal;

[0255] It should be noted that the Class II reference signal configuration parameters and the Class II codebook are configured by the base station. Here, the base station may send a Class II reference signal based on the Class II reference signal configuration parameters.

[0256] Sending Class II reference signal configuration parameters and phase and / or amplitude configuration information of the node device to the node device, wherein the Class II reference signal configuration parameters include: multiple parameter adjustments, and different time domain positions corresponding to different parameters.

[0257] Here, the Class II reference signal configuration parameters are associated with the node device phase and / or amplitude configuration information, and the node device phase and / or amplitude configuration information is sent to the node device in order to instruct the node device to make corresponding phase adjustments so that the terminal can make appropriate channel estimation and feedback.

[0258] As an optional implementation, the method of the embodiment of the present invention may further include:

[0259] According to the codeword selected based on the Class II codebook and the corresponding codebook type, a channel matrix is ​​obtained;

[0260] In one example, considering that the position of the node device (such as a reflector) is relatively fixed, its deployment position is more likely to be selected at a position with a direct line of sight with the base station. Therefore, the channel between the base station and the node device is a deterministic known channel and can be approximately considered to be unchanged (the channel from the node device to the base station can be obtained by uplink and downlink reciprocity in the early stage of deployment). In addition, the channel between the node device and the base station can also be solved by some approximate methods. During the channel estimation process, the phase of the node device can be adjusted multiple times, so it is considered that the matrix Assume that the matrix F (the channel matrix between the reflector and the base station) is also a known matrix.

[0261] Therefore, in order to obtain or G k The estimated value of can be calculated using the following equation:

[0262]

[0263]

[0264] in, N T is the number of antennas at the base station, matrix To select any M-(N-1)N in the matrix F T In this way, the coefficient matrix of the full-rank square matrix can be constructed Matrix, according to the zero-breaking ZF criterion and the minimum mean square error MMSE criterion, can be solved or G k .

[0265] According to the above equation, we only need to be able to pass a sufficient number of times ( times) training to obtain a coefficient matrix of sufficient dimension, the above equation can be used to solve or G k Compared with the existing method which requires M+1 training times, it can reduce training times, thereby reducing the reference signal overhead. For example, M = 100, N T When =64, the reference signal overhead can be reduced by 98%.

[0266] Perform precoding processing according to the channel matrix to obtain a first result;

[0267] Based on the first result, configure the phase and / or amplitude configuration information corresponding to the service transmission and the transmission resources corresponding to the phase and / or amplitude configuration information for the node device;

[0268] A service signal is sent, and the service signal is reflected by the node device on the transmission resource using the phase and / or amplitude configuration information.

[0269] The information transmission method of the embodiment of the present invention sends a Class I reference signal and a Class II reference signal, wherein the Class I reference signal corresponds to a Class I codebook, and the Class II reference signal corresponds to a Class II codebook; receives a codeword selected based on the Class I codebook and a corresponding codebook type; receives a codeword selected based on the Class II codebook and a corresponding codebook type, so that the codeword selected based on the Class II codebook and the corresponding codebook type that can accurately reflect the channel characteristics are fed back by the terminal. Based on this, the base station can obtain accurate channel information, thereby providing an accurate basis for its subsequent precoding calculation during beamforming.

[0270] like Figure 4 As shown, an embodiment of the present invention further provides an information transmission method, which is applied to a node device, wherein the node device has a function of reflecting a signal or forwarding a reflected signal, and the method includes:

[0271] Step 401: receiving Class II reference signal configuration parameters and node device phase and / or amplitude configuration information, wherein the Class II reference signal configuration parameters include: multiple parameter adjustments, and different time domain positions corresponding to different parameters.

[0272] Here, the Class II reference signal configuration parameters and the node device phase and / or amplitude configuration information are configured by the base station. It should be noted that the phase and / or amplitude can be configured by the base station or reported by the terminal.

[0273] Specifically, the type II reference signal configuration parameters and the node device phase and / or amplitude configuration information sent by the base station are received.

[0274] The information transmission method of an embodiment of the present invention receives Class II reference signal configuration parameters and node device phase and / or amplitude configuration information, wherein the Class II reference signal configuration parameters include: multiple parameter adjustments, and different time domain positions corresponding to different parameters. In this way, the node device can be instructed to make corresponding adjustments, so that the terminal can make appropriate channel estimation and feedback.

[0275] As an optional implementation, the method further includes:

[0276] Report the available phase to the base station.

[0277] Here, the node device reports the available phase to the base station, which is intended to facilitate the base station to configure the node device phase and / or amplitude configuration information based on the phase reported by the node device. Specifically, the phase included in the node device phase and / or amplitude configuration information is taken from the available phase reported by the node device.

[0278] As an optional implementation, the method of the embodiment of the present invention may further include:

[0279] Acquire the phase and / or amplitude configuration information corresponding to the service transmission and the transmission resources corresponding to the phase and / or amplitude configuration information.

[0280] Furthermore, the method of the embodiment of the present invention may also include:

[0281] On the transmission resource corresponding to the phase and / or amplitude configuration information, the service signal from the base station is reflected after adjusting the phase based on the phase and / or amplitude configuration information.

[0282] It should be noted that since the node device reflects the Class II reference signal, after the terminal receives it, channel estimation is performed based on the Class II reference signal to obtain a codeword selected based on the Class II codebook and a corresponding codebook type. The codeword selected based on the Class II codebook and the corresponding codebook type take into account the characteristics of the reflection link channel. Here, the base station configures the node device for the corresponding phase and / or amplitude configuration information during service transmission based on the codeword selected based on the Class II codebook and the corresponding codebook type, so that the phase and / or amplitude configuration of the node device is more accurate. The reflected service signal after adjusting the phase using the phase and / or amplitude configuration information can reduce interference between users and improve system capacity.

[0283] The information transmission method of an embodiment of the present invention receives Class II reference signal configuration parameters and node device phase and / or amplitude configuration information, wherein the Class II reference signal configuration parameters include: multiple parameter adjustments, and different time domain positions corresponding to different parameters. In this way, the node device can be instructed to make corresponding adjustments, so that the terminal can make appropriate channel estimation and feedback.

[0284] Based on the reflector communication system, the implementation process of the method of the present invention is specifically described below from the perspective of process interaction between the terminal, the reflector and the base station.

[0285] like Figure 5 As shown in the figure, the specific interaction process is as follows:

[0286] S1: The terminal receives a type I reference signal sent by the base station;

[0287] S2: The terminal reports target information to the base station, where the target information includes channel state information and / or location related information;

[0288] Here, after receiving the type I reference signal sent by the base station, the terminal performs channel measurement to obtain channel state information.

[0289] Optionally, S3: when the terminal determines that it is located near the reflector based on the target information, the terminal triggers the base station to send configuration information of a type II reference signal;

[0290] S4: The base station sends configuration information of a Class II reference signal and a Class II codebook to the terminal;

[0291] It should be noted that, when the base station determines that it is located near the reflector based on the target information reported by the terminal, it sends the configuration information of the type II reference signal.

[0292] S5: The base station sends configuration information of the type II reference signal and phase information of the reflector to the reflector;

[0293] S6: The base station sends a Class II reference signal, and the reflector adjusts the phase reflection signal at the corresponding RS transmission position based on the configuration information of the Class II reference signal and the reflector phase information.

[0294] Specifically, Figure 6 As shown, the reflector obtains the time domain pattern of the Class II reference signal configured by the base station from the base station, and adjusts the phase of the reflector at different time domain positions, thereby ensuring that the terminal can receive the Class II reference signal reflected at different phases.

[0295] S7: The terminal performs channel estimation of the reflection link based on the Class II reference signal and selects the Class II codebook for feedback;

[0296] Since the characteristics of the reflection link are different from those of the direct link, the type II codebook is selected for feedback according to the configuration of the base station. In the feedback information, it should be distinguished which type of codebook the currently fed back PMI is based on.

[0297] S8: phase configuration information when the base station configures the reflector for actual transmission;

[0298] It should be noted that the base station calculates the channel matrix based on the feedback from the terminal; performs precoding calculation based on the channel matrix to obtain a first result, and configures the phase configuration information of the reflector during actual transmission based on the first result. The transmission resource information corresponding to the phase configuration information also needs to be configured to the reflector.

[0299] S9: base station transmission service;

[0300] S10: The reflector uses the phase in the phase configuration information to reflect the service signal on the corresponding transmission resource.

[0301] like Figure 7 As shown, an embodiment of the present invention further provides a channel feedback device, which is applied to a terminal and includes:

[0302] A first receiving module 701 is configured to receive a type I reference signal and a type II reference signal, wherein the type I reference signal corresponds to a type I codebook, and the type II reference signal corresponds to a type II codebook;

[0303] A first feedback module 702 is configured to feed back a codeword selected based on a type I codebook and a corresponding codebook type based on the type I reference signal;

[0304] The second feedback module 703 is configured to feed back a codeword selected based on a type II codebook and a corresponding codebook type based on the type II reference signal.

[0305] Optionally, the type I reference signal is one of a reference signal when there is no node device and a reference signal when a node device parameter is not adjusted;

[0306] The type II reference signal is one of a reference signal when a node device is present and a reference signal when a node device parameter is adjusted, and the node device has a function of reflecting a signal or forwarding a reflected signal.

[0307] Optionally, the channel feedback device further includes:

[0308] The second receiving module is configured to receive configuration information of the Class II reference signal and a Class II codebook corresponding to the Class II reference signal.

[0309] Optionally, the phase and / or amplitude of the node device is configured by a base station or determined by the node device.

[0310] Optionally, the channel feedback device further includes:

[0311] A first acquisition module, configured to acquire channel state information and / or location-related information of a terminal, wherein the channel state information is obtained from the Class I reference signal, and the location-related information includes geographical location information and / or a receiving angle;

[0312] A first sending module is used to report target information to a base station, so that the base station sends a Class II reference signal when it determines, based on the target information and uplink measurement information, that the distance between the terminal and the node device is within a preset range; or, when it is determined, based on the target information, that the distance between the terminal and the node device is within a preset range, a first request is sent to the base station, wherein the first request is used to request the base station to send a Class II reference signal, and the target information includes the channel state information and / or the position-related information.

[0313] Optionally, the second feedback module 703 includes:

[0314] The first acquisition unit is used to acquire Class II reference signal configuration parameters, where the Class II reference signal configuration parameters include: multiple parameter adjustments, and different time domain positions corresponding to different parameters.

[0315] Optionally, the second feedback module 703 further includes:

[0316] A first calculation unit is used to subtract a channel estimated by a Class II reference signal configured according to a first parameter at a first time domain position from a channel estimated by a Class II reference signal configured according to a second parameter at a second time domain position based on the Class II reference signal configuration parameters, to obtain an equivalent channel, wherein the first parameter configuration and the second parameter configuration are different.

[0317] Optionally, the second feedback module 703 further includes:

[0318] The channel estimation unit is used to perform quantization estimation on the equivalent channel based on the Class II codebook, obtain the codeword selected based on the Class II codebook, and feed back the codeword selected based on the Class II codebook and the corresponding codebook type to the base station.

[0319] Optionally, the channel feedback device further includes:

[0320] The third receiving module is used to receive the service signal reflected after the node device adjusts the phase and / or amplitude based on the configuration information during service transmission, and the configuration information is configured by the base station based on the codeword selected by the type II codebook and the corresponding codebook type.

[0321] The channel feedback device of an embodiment of the present invention receives a Class I reference signal and a Class II reference signal, wherein the Class I reference signal corresponds to a Class I codebook and the Class II reference signal corresponds to a Class II codebook; based on the Class I reference signal, a codeword selected based on the Class I codebook and a corresponding codebook type are fed back; based on the Class II reference signal, a codeword selected based on the Class II codebook and a corresponding codebook type are fed back. In this way, by introducing the Class II reference signal, channel estimation and feedback of the reflected channel can be achieved, thereby accurately reflecting the characteristics of the reflected channel, so that the base station obtains accurate channel information, and provides an accurate basis for the subsequent precoding calculation of the base station side when performing beamforming.

[0322] It should be noted here that the above-mentioned device provided by the embodiment of the present invention can implement all the method steps implemented by the above-mentioned terminal side method embodiment, and can achieve the same technical effect. The parts and beneficial effects that are the same as the method embodiment in this embodiment will not be described in detail here.

[0323] like Figure 8 As shown, an embodiment of the present invention further provides an information transmission device, which is applied to a base station and includes:

[0324] A second sending module 801 is configured to send a type I reference signal and a type II reference signal, wherein the type I reference signal corresponds to a type I codebook, and the type II reference signal corresponds to a type II codebook;

[0325] A fourth receiving module 802 is configured to receive a codeword selected based on a type I codebook and a corresponding codebook type;

[0326] The fifth receiving module 803 is configured to receive a codeword selected based on a type II codebook and a corresponding codebook type.

[0327] Optionally, the type I reference signal is one of a reference signal when there is no node device and a reference signal when a node device parameter is not adjusted;

[0328] The type II reference signal is one of a reference signal when a node device is present and a reference signal when a node device parameter is adjusted, and the node device has a function of reflecting a signal or forwarding a reflected signal.

[0329] Optionally, the second sending module 801 may include:

[0330] A first sending unit, configured to send a Class II reference signal when a preset condition is met;

[0331] The preset condition includes one of the following conditions:

[0332] Determine, based on uplink measurement information and channel state information and / or location related information reported by the terminal, that the distance between the terminal and the node device is within a preset range, wherein the location related information includes geographic location information and / or a receiving angle;

[0333] A first request sent by a terminal is received, where the first request is used to request the base station to send a Class II reference signal.

[0334] Optionally, the information transmission device further includes:

[0335] A third sending module, configured to send a Class II reference signal configuration parameter and a Class II codebook corresponding to the Class II reference signal to a terminal;

[0336] A fourth sending module, used to send Class II reference signal configuration parameters and phase and / or amplitude configuration information of the node device to the node device;

[0337] The Class II reference signal configuration parameters include: multiple parameter adjustments, and different time domain positions corresponding to different parameters.

[0338] Optionally, the information transmission device further includes:

[0339] A first processing module, configured to obtain a channel matrix according to a codeword selected based on a Class II codebook and a corresponding codebook type;

[0340] A second processing module, configured to perform precoding processing according to the channel matrix to obtain a first result;

[0341] A configuration module, configured to configure, for the node device, phase and / or amplitude configuration information corresponding to service transmission and transmission resources corresponding to the phase and / or amplitude configuration information based on the first result;

[0342] The fifth sending module is used to send a service signal, and the service signal is reflected by the node device on the transmission resource using the phase and / or amplitude configuration information.

[0343] The information transmission device of the embodiment of the present invention sends a Class I reference signal and a Class II reference signal, wherein the Class I reference signal corresponds to a Class I codebook, and the Class II reference signal corresponds to a Class II codebook; receives a codeword selected based on the Class I codebook and a corresponding codebook type; receives a codeword selected based on the Class II codebook and a corresponding codebook type, so that the codeword selected based on the Class II codebook and the corresponding codebook type that can accurately reflect the channel characteristics are fed back by the terminal. Based on this, the base station can obtain accurate channel information, thereby providing an accurate basis for its subsequent precoding calculation when performing beamforming.

[0344] It should be noted here that the above-mentioned device provided by the embodiment of the present invention can implement all the method steps implemented by the above-mentioned base station side method embodiment, and can achieve the same technical effect. The parts and beneficial effects that are the same as the method embodiment in this embodiment will not be described in detail here.

[0345] like Fig. 9 As shown, an embodiment of the present invention further provides an information transmission device, which is applied to a node device, and the node device has a function of reflecting a signal or forwarding a reflected signal, including:

[0346] The sixth receiving module 901 receives Class II reference signal configuration parameters and node device phase and / or amplitude configuration information, wherein the Class II reference signal configuration parameters include: multiple parameter adjustments, and different time domain positions corresponding to different parameters.

[0347] Optionally, the information transmission device further includes:

[0348] The sixth sending module is used to report the available phase to the base station.

[0349] Optionally, the information transmission device further includes:

[0350] The second acquisition module is used to obtain the phase and / or amplitude configuration information corresponding to the service transmission and the transmission resources corresponding to the phase and / or configuration information, wherein the phase and / or amplitude configuration information is configured by a codeword selected by the base station based on a Class II codebook and a corresponding codebook type, and the Class II codebook corresponds to a Class II reference signal.

[0351] Optionally, the information transmission device further includes:

[0352] The first reflection module is used to reflect the service signal from the base station after adjusting the phase based on the phase and / or amplitude configuration information on the transmission resource corresponding to the phase and / or amplitude configuration information.

[0353] The information transmission device of an embodiment of the present invention receives Class II reference signal configuration parameters and node device phase and / or amplitude configuration information, wherein the Class II reference signal configuration parameters include: multiple parameter adjustments, and different time domain positions corresponding to different parameters. In this way, the node device can be instructed to make corresponding adjustments, so that the terminal can make appropriate channel estimation and feedback.

[0354] It should be noted here that the above-mentioned device provided by the embodiment of the present invention can implement all the method steps implemented by the above-mentioned reflection plate side method embodiment, and can achieve the same technical effect. The parts and beneficial effects of this embodiment that are the same as the method embodiment will not be described in detail here.

[0355] In order to better achieve the above goals, Fig.10 As shown, an embodiment of the present invention further provides a terminal, including a processor 1000 and a transceiver 1010. The terminal also includes a user interface 1020. The processor 1000 is used to perform the following process:

[0356] Receiving, by the transceiver 1010, a type I reference signal and a type II reference signal, wherein the type I reference signal corresponds to a type I codebook, and the type II reference signal corresponds to a type II codebook;

[0357] Based on the I-type reference signal, feeding back a codeword selected based on the I-type codebook and a corresponding codebook type;

[0358] Based on the Class II reference signal, a codeword selected based on the Class II codebook and a corresponding codebook type are fed back.

[0359] Optionally, the type I reference signal is one of a reference signal when there is no node device and a reference signal when a node device parameter is not adjusted;

[0360] The type II reference signal is one of a reference signal when a node device is present and a reference signal when a node device parameter is adjusted, and the node device has a function of reflecting a signal or forwarding a reflected signal.

[0361] Optionally, the transceiver 1010 is further configured to:

[0362] Configuration information of the Class II reference signal and a Class II codebook corresponding to the Class II reference signal are received.

[0363] Optionally, the phase and / or amplitude of the node device is configured by a base station or determined by the node device.

[0364] Optionally, the processor 1000 is further configured to:

[0365] Acquire channel state information and / or location related information of the terminal, the channel state information is obtained by the type I reference signal, and the location related information includes geographical location information and / or receiving angle;

[0366] The transceiver 1010 reports the target information to the base station, so that the base station determines, based on the target information and the uplink measurement information, that the distance between the terminal and the node device is within a preset range and then sends a Class II reference signal; or, based on the target information, determines that the distance between the terminal and the node device is within a preset range, a first request is sent to the base station, wherein the first request is used to request the base station to send a Class II reference signal, and the target information includes the channel state information and / or the position-related information.

[0367] Optionally, the processor 1000 is further configured to:

[0368] A Class II reference signal configuration parameter is obtained, where the Class II reference signal configuration parameter includes: multiple parameter adjustments, and different time domain positions corresponding to different parameters.

[0369] Based on the Class II reference signal configuration parameters, subtracting a channel estimated at a first time domain position according to a Class II reference signal corresponding to a first parameter configuration from a channel estimated at a second time domain position according to a Class II reference signal corresponding to a second parameter configuration to obtain an equivalent channel, wherein the first parameter configuration and the second parameter configuration are different;

[0370] Based on the Class II codebook, the equivalent channel is quantized and estimated to obtain a codeword selected based on the Class II codebook, and the codeword selected based on the Class II codebook and the corresponding codebook type are fed back to the base station.

[0371] Optionally, the transceiver 1010 is further configured to:

[0372] The receiving node device adjusts the phase and / or amplitude of the reflected service signal based on the configuration information during service transmission, where the configuration information is configured by the base station based on the codeword selected by the type II codebook and the corresponding codebook type.

[0373] The terminal of the embodiment of the present invention receives a Class I reference signal and a Class II reference signal, wherein the Class I reference signal corresponds to a Class I codebook and the Class II reference signal corresponds to a Class II codebook; based on the Class I reference signal, a codeword selected based on the Class I codebook and a corresponding codebook type are fed back; based on the Class II reference signal, a codeword selected based on the Class II codebook and a corresponding codebook type are fed back. In this way, by introducing the Class II reference signal, channel estimation and feedback of the reflected channel can be achieved, thereby accurately reflecting the characteristics of the reflected channel, so that the base station obtains accurate channel information, and provides an accurate basis for the subsequent precoding calculation of the base station side when performing beamforming.

[0374] An embodiment of the present invention further provides a terminal, comprising a memory, a processor, and a program stored in the memory and executable on the processor; when the processor executes the program, each process in the channel feedback method embodiment described above is implemented, and the same technical effect can be achieved. To avoid repetition, it will not be described here.

[0375] In order to better achieve the above goals, Fig.11 As shown, an embodiment of the present invention further provides a base station, including a processor 1100 and a transceiver 1110, wherein the transceiver 1110 receives and sends data under the control of the processor 1100, and the processor 1100 is used to perform the following process:

[0376] Sending, by the transceiver 1110, a type I reference signal and a type II reference signal, wherein the type I reference signal corresponds to a type I codebook, and the type II reference signal corresponds to a type II codebook;

[0377] Receiving a codeword selected based on a type I codebook and a corresponding codebook type;

[0378] A codeword selected based on a Class II codebook and a corresponding codebook type are received.

[0379] Optionally, the type I reference signal is one of a reference signal when there is no node device and a reference signal when a node device parameter is not adjusted;

[0380] The type II reference signal is one of a reference signal when a node device is present and a reference signal when a node device parameter is adjusted, and the node device has a function of reflecting a signal or forwarding a reflected signal.

[0381] Optionally, the transceiver 1110 is further configured to:

[0382] When the preset conditions are met, a Class II reference signal is sent;

[0383] The preset condition includes one of the following conditions:

[0384] Determine, based on uplink measurement information and channel state information and / or location related information reported by the terminal, that the distance between the terminal and the node device is within a preset range, wherein the location related information includes geographic location information and / or a receiving angle;

[0385] A first request sent by a terminal is received, where the first request is used to request the base station to send a Class II reference signal.

[0386] Optionally, the transceiver 1110 is further configured to:

[0387] Sending a Class II reference signal configuration parameter and a Class II codebook corresponding to the Class II reference signal to the terminal;

[0388] Sending Class II reference signal configuration parameters and phase and / or amplitude configuration information of the node device to the node device;

[0389] The Class II reference signal configuration parameters include: multiple parameter adjustments, and different time domain positions corresponding to different parameters.

[0390] Optionally, the processor 1100 is further configured to:

[0391] According to the codeword selected based on the Class II codebook and the corresponding codebook type, a channel matrix is ​​obtained;

[0392] Perform precoding processing according to the channel matrix to obtain a first result;

[0393] Based on the first result, configure the phase and / or amplitude configuration information corresponding to the service transmission and the transmission resources corresponding to the phase and / or amplitude configuration information for the node device;

[0394] A service signal is sent, and the service signal is reflected by the node device on the transmission resource using the phase and / or amplitude configuration information.

[0395] The base station of an embodiment of the present invention sends a Class I reference signal and a Class II reference signal, wherein the Class I reference signal corresponds to a Class I codebook, and the Class II reference signal corresponds to a Class II codebook; receives a codeword selected based on the Class I codebook and a corresponding codebook type; receives a codeword selected based on the Class II codebook and a corresponding codebook type, so that the codeword selected based on the Class II codebook and the corresponding codebook type that can accurately reflect the channel characteristics are fed back by the terminal. Based on this, the base station can obtain accurate channel information, thereby providing an accurate basis for its subsequent precoding calculation during beamforming.

[0396] An embodiment of the present invention provides a base station, comprising a memory, a processor, and a program stored in the memory and executable on the processor; the program is characterized in that when the processor executes the program, each process in the information transmission method embodiment described above is implemented, and the same technical effect can be achieved. To avoid repetition, it will not be described here.

[0397] In order to better achieve the above goals, Fig.12 As shown, an embodiment of the present invention further provides a node device, which has a function of reflecting a signal or forwarding a reflected signal, and includes a processor 1200 and a transceiver 1210, and the processor 1200 is used to perform the following process:

[0398] The transceiver 1210 receives Class II reference signal configuration parameters and node device phase and / or amplitude configuration information, wherein the Class II reference signal configuration parameters include: multiple parameter adjustments, and different time domain positions corresponding to different parameters.

[0399] Optionally, the transceiver 1210 is further configured to:

[0400] Report the available phase to the base station.

[0401] Optionally, the processor 1200 is further configured to:

[0402] Acquire phase and / or amplitude configuration information corresponding to service transmission and a transmission resource corresponding to the phase and / or configuration information, wherein the phase and / or amplitude configuration information is configured by a codeword selected by the base station based on a Class II codebook and a corresponding codebook type, and the Class II codebook corresponds to a Class II reference signal;

[0403] On the transmission resource corresponding to the phase and / or amplitude configuration information, the service signal from the base station is reflected after adjusting the phase based on the phase and / or amplitude configuration information.

[0404] The node device of an embodiment of the present invention receives Class II reference signal configuration parameters and node device phase and / or amplitude configuration information, wherein the Class II reference signal configuration parameters include: multiple parameter adjustments, and different time domain positions corresponding to different parameters. In this way, the node device can be instructed to make corresponding adjustments, so that the terminal can make appropriate channel estimation and feedback.

[0405] An embodiment of the present invention also provides a node device, including a memory, a processor, and a program stored in the memory and executable on the processor; when the processor executes the program, the various processes in the information transmission method embodiment described above are implemented, and the same technical effect can be achieved. To avoid repetition, it will not be repeated here.

[0406] The embodiment of the present invention further provides a computer-readable storage medium on which a computer program is stored. When the program is executed by a processor, each process in the channel feedback method or information transmission method described above is implemented, and the same technical effect can be achieved. To avoid repetition, it is not repeated here. The computer-readable storage medium is, for example, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

[0407] It will be appreciated by those skilled in the art that embodiments of the present invention may be provided as methods, systems or computer program products. Therefore, the present invention may take the form of a complete hardware embodiment, a complete software embodiment or an embodiment combining software and hardware. Moreover, the present invention may take the form of a computer program product implemented on one or more computer-readable storage media (including but not limited to disk storage and optical storage, etc.) containing computer-usable program code.

[0408] The present invention is described with reference to flowcharts and / or block diagrams of methods, devices (systems) and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as the combination of processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the process in the flowchart. Figure 1 A device that specifies functions in one or more processes and / or one or more blocks.

[0409] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer-readable storage medium produce a paper product including an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0410] These computer program instructions may also be loaded onto a computer or other programmable data processing device so that the computer or other programmable device executes a series of operating steps to produce a computer-implemented process, thereby providing instructions executed on the computer or other programmable device for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0411] The above is a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A channel feedback method, applied to a terminal, characterized in that: include: receiving a type I reference signal and a type II reference signal, wherein the type I reference signal corresponds to a type I codebook, and the type II reference signal corresponds to a type II codebook, wherein the type I reference signal is one of a reference signal when there is no node device and a reference signal when a node device parameter is not adjusted, and the type II reference signal is one of a reference signal when there is a node device and a reference signal when a node device parameter is adjusted, and the node device has a function of reflecting a signal or forwarding a reflected signal; Based on the I-type reference signal, feeding back a codeword selected based on the I-type codebook and a corresponding codebook type; Based on the Class II reference signal, a codeword selected based on the Class II codebook and a corresponding codebook type are fed back.

2. The method according to claim 1, characterized in that The method further comprises: Configuration information of the Class II reference signal and a Class II codebook corresponding to the Class II reference signal are received.

3. The method according to claim 1, characterized in that The phase and / or amplitude of the node device is configured by the base station or determined by the node device.

4. The method according to claim 1, characterized in that: The method further comprises: Acquire channel state information and / or location related information of the terminal, the channel state information is obtained by the type I reference signal, and the location related information includes geographical location information and / or receiving angle; Report target information to a base station so that the base station determines, based on the target information and uplink measurement information, that the distance between the terminal and the node device is within a preset range and then sends a Class II reference signal; or, based on the target information, determines that the distance between the terminal and the node device is within a preset range and then sends a first request to the base station, wherein the first request is used to request the base station to send a Class II reference signal, and the target information includes the channel state information and / or the position-related information.

5. The method according to claim 1, characterized in that The feeding back, based on the Class II reference signal, a codeword selected based on a Class II codebook and a corresponding codebook type, includes: Configuration parameters of a Class II reference signal are obtained, where the configuration parameters of the Class II reference signal include: multiple parameter adjustments, and different time domain positions corresponding to different parameters.

6. The method according to claim 1 or 5, characterized in that: The method further comprises feeding back a codeword selected based on a Class II codebook and a corresponding codebook type based on the Class II reference signal. Based on the configuration parameters of the Class II reference signal, a channel estimated by a Class II reference signal configured according to a first parameter at a first time domain position is subtracted from a channel estimated by a Class II reference signal configured according to a second parameter at a second time domain position to obtain an equivalent channel, and the first parameter configuration and the second parameter configuration are different.

7. The method according to claim 1, characterized in that The step of feeding back a codeword selected based on a Class II codebook and a corresponding codebook type based on the Class II reference signal further includes: Based on the Class II codebook, the equivalent channel is quantized and estimated to obtain a codeword selected based on the Class II codebook, and the codeword selected based on the Class II codebook and the corresponding codebook type are fed back to the base station.

8. The method according to claim 1, characterized in that: The method further comprises: The receiving node device adjusts the phase and / or amplitude of the reflected service signal based on the configuration information during service transmission, where the configuration information is configured by the base station based on the codeword selected by the type II codebook and the corresponding codebook type.

9. An information transmission method, applied to a base station, characterized in that: include: Sending a type I reference signal and a type II reference signal, wherein the type I reference signal corresponds to a type I codebook, and the type II reference signal corresponds to a type II codebook, wherein the type I reference signal is one of a reference signal when there is no node device and a reference signal when a node device parameter is not adjusted, and the type II reference signal is one of a reference signal when there is a node device and a reference signal when a node device parameter is adjusted, and the node device has a function of reflecting a signal or forwarding a reflected signal; Receiving a codeword selected based on a type I codebook and a corresponding codebook type; A codeword selected based on a Class II codebook and a corresponding codebook type are received.

10. The method according to claim 9, characterized in that Sending Class II reference signals, including: When the preset conditions are met, a Class II reference signal is sent; The preset condition includes one of the following conditions: Determine, based on uplink measurement information and channel state information and / or location related information reported by the terminal, that the distance between the terminal and the node device is within a preset range, wherein the location related information includes geographic location information and / or a receiving angle; A first request sent by a terminal is received, where the first request is used to request the base station to send a Class II reference signal.

11. The method according to claim 9, characterized in that The method further comprises: Sending a Class II reference signal configuration parameter and a Class II codebook corresponding to the Class II reference signal to the terminal; Sending Class II reference signal configuration parameters and phase and / or amplitude configuration information of the node device to the node device; The Class II reference signal configuration parameters include: multiple parameter adjustments, and different time domain positions corresponding to different parameters.

12. The method according to claim 9, characterized in that The method further comprises: According to the codeword selected based on the Class II codebook and the corresponding codebook type, a channel matrix is ​​obtained; Perform precoding processing according to the channel matrix to obtain a first result; Based on the first result, configure the phase and / or amplitude configuration information corresponding to the service transmission and the transmission resources corresponding to the phase and / or amplitude configuration information for the node device; A service signal is sent, and the service signal is reflected by the node device on the transmission resource using the phase and / or amplitude configuration information.

13. A channel feedback device, characterized in that: include: a first receiving module, configured to receive a type I reference signal and a type II reference signal, wherein the type I reference signal corresponds to a type I codebook, and the type II reference signal corresponds to a type II codebook, wherein the type I reference signal is one of a reference signal when there is no node device and a reference signal when a node device parameter is not adjusted, and the type II reference signal is one of a reference signal when there is a node device and a reference signal when a node device parameter is adjusted, and the node device has a function of reflecting a signal or forwarding a reflected signal; A first feedback module, configured to feed back a codeword selected based on a type I codebook and a corresponding codebook type based on the type I reference signal; The second feedback module is configured to feed back a codeword selected based on a type II codebook and a corresponding codebook type based on the type II reference signal.

14. A terminal comprising a processor and a transceiver, characterized in that: The processor is used to execute the following process: Receiving, by the transceiver, a type I reference signal and a type II reference signal, wherein the type I reference signal corresponds to a type I codebook, and the type II reference signal corresponds to a type II codebook, wherein the type I reference signal is one of a reference signal when there is no node device and a reference signal when a node device parameter is not adjusted, and the type II reference signal is one of a reference signal when there is a node device and a reference signal when a node device parameter is adjusted, and the node device has a function of reflecting a signal or forwarding a reflected signal; Based on the I-type reference signal, feeding back a codeword selected based on the I-type codebook and a corresponding codebook type; Based on the Class II reference signal, a codeword selected based on the Class II codebook and a corresponding codebook type are fed back.

15. A terminal comprising a memory, a processor, and a program stored in the memory and executable on the processor; characterized in that: When the processor executes the program, the channel feedback method according to any one of claims 1 to 8 is implemented.

16. A channel transmission device, characterized in that: include: a second sending module, configured to send a type I reference signal and a type II reference signal, wherein the type I reference signal corresponds to a type I codebook, the type II reference signal corresponds to a type II codebook, the type I reference signal is one of a reference signal when there is no node device and a reference signal when a node device parameter is not adjusted, and the type II reference signal is one of a reference signal when there is a node device and a reference signal when a node device parameter is adjusted, and the node device has a function of reflecting a signal or forwarding a reflected signal; A fourth receiving module, configured to receive a codeword selected based on the type I codebook and a corresponding codebook type; The fifth receiving module is configured to receive a codeword selected based on the type II codebook and a corresponding codebook type.

17. A base station, comprising a processor and a transceiver, wherein the transceiver receives and sends data under the control of the processor, characterized in that: The processor is configured to perform the following operations: Sending a type I reference signal and a type II reference signal through the transceiver, wherein the type I reference signal corresponds to a type I codebook, and the type II reference signal corresponds to a type II codebook, wherein the type I reference signal is one of a reference signal when there is no node device and a reference signal when a node device parameter is not adjusted, and the type II reference signal is one of a reference signal when there is a node device and a reference signal when a node device parameter is adjusted, and the node device has a function of reflecting a signal or forwarding a reflected signal; Receiving a codeword selected based on a type I codebook and a corresponding codebook type; A codeword selected based on a Class II codebook and a corresponding codebook type are received.

18. A base station, comprising a memory, a processor, and a program stored in the memory and executable on the processor; characterized in that: When the processor executes the program, the information transmission method according to any one of claims 9 to 12 is implemented.

19. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the program is executed by a processor, the steps of the channel feedback method according to any one of claims 1 to 8 or the steps of the information transmission method according to any one of claims 9 to 12 are implemented.

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