Channel isolation method and system

Abstract

An embodiment of the present invention provides a channel separation method and system, which includes a reconfigurable intelligent surface or relay located between a base station and a terminal, switching a reflected pilot signal to a new codebook at a given symbol position according to a preset codebook reflection coefficient.

Description

[Technical Field]

[0001] Embodiments of the present invention relate to the field of communications, and more specifically, to channel separation methods and systems. [Background technology]

[0002] Reconfigurable intelligent surfaces have already become a popular research direction for Beyond 5th Generation (B5G) and 6th Generation (6G) mobile communication systems as a low-cost radio signal augmentation scheme. With the help of reconfigurable intelligent surfaces, it is possible to significantly improve the elimination of blind spots in radio signals and the capacity of hotspot areas.

[0003] Figure 1 is a schematic diagram of the channel between a base station and a terminal in the case of a reconfigurable intelligent surface in the related technology. As shown in Figure 1, a direct channel H exists between the base station and the terminal. d And reflections through the reconfigurable intelligent surface Channel H r If such a thing exists, and a strong channel exists between the base station, the reconfigurable intelligent surface, and the terminal, that is, H between the base station and the terminal d and H r If both are strong, H d and H r There are time and angular discrepancies, which can severely affect channel estimation and demodulation performance in some situations. At the same time, problems such as positioning errors occur because it is not possible to correctly distinguish whether the channel came directly from the base station or reflected from a reconfigurable intelligent surface. Existing communication systems do not take into account the separation of direct channels and reflected channels, so channels received at the base station or terminal end end up being mixed. [Overview of the project] [Problems that the invention aims to solve]

[0004] Embodiments of the present invention provide a channel separation method and system to solve, at least, the problem of mixed channels received at the base station or terminal side in related technologies. [Means for solving the problem]

[0005] According to one embodiment of the present invention, a channel isolation method is provided which includes the step of switching a reflected pilot signal to a new codebook at a predetermined symbol position according to a preset codebook reflection coefficient, using a reconfigurable intelligent surface or relay located between a base station and a terminal.

[0006] According to another embodiment of the present invention, a channel isolation system is provided which includes a reconfigurable intelligent surface or relay located between a base station and a terminal and configured to switch a reflected pilot signal to a new codebook at a predetermined symbolic position according to a preset codebook reflection coefficient.

[0007] According to yet another embodiment of the present invention, a computer-readable storage medium is further provided which stores a computer program configured, when executed, to perform the steps of any of the above-described method embodiments.

[0008] A further embodiment of the present invention provides an electronic device comprising a memory in which a computer program is stored, and a processor configured to execute the computer program in order to perform the steps of any of the above method embodiments. [Brief explanation of the drawing]

[0009] [Figure 1] This is a schematic diagram of the channel between a base station and a terminal when a reconfigurable intelligent surface exists in related technologies. [Figure 2] This is a flowchart of a channel separation method according to an embodiment of the present invention. [Figure 3]It is a configuration block diagram of a channel separation system according to an embodiment of the present invention. [Figure 4] It is a flowchart of a channel separation method when there is a reconfigurable intelligent surface according to an embodiment of the present invention. [Figure 5] It is a schematic diagram of the coefficients of a reconfigurable intelligent surface under the condition that a 2-symbol pilot signal is set according to an embodiment of the present invention. [Figure 6] It is a schematic diagram of the coefficients of a reconfigurable intelligent surface under the condition that a 4-symbol pilot signal is set according to an embodiment of the present invention. [Figure 7] It is a flowchart of a downlink channel separation method according to an embodiment of the present invention. [Figure 8] It is a flowchart of an uplink channel separation method according to an embodiment of the present invention.

Mode for Carrying Out the Invention

[0010] Hereinafter, embodiments of the present invention will be described in detail in accordance with the embodiments while referring to the drawings. In the related art, a reconfigurable intelligent surface or relay is a low-cost wireless signal enhancement scheme. However, as shown in FIG. 1, when there is a reconfigurable intelligent surface or relay, there is a direct channel H between the base station and the terminal. d And a reflected channel H passing through the reconfigurable intelligent surface. r And as a result, the channels received by the base station or terminal on the receiving side will be mixed. Therefore, in the embodiments of the present invention, there is provided a channel separation method and system applicable when there is a reconfigurable intelligent surface or relay as described above, which can effectively separate the direct channel H between the base station and the terminal. d And the channel H reflected by the reconfigurable intelligent surface. r And improve the performance of demodulation, positioning, etc.

[0011] In this embodiment, a channel separation method is provided. FIG. 2 is a flowchart of the channel separation method according to an embodiment of the present invention. As shown in FIG. 2, the flow includes the following step S202.

[0012] Step S202: A reconfigurable intelligent surface or relay located between the base station and the terminal switches the reflected pilot signal to a new codebook according to a preset codebook reflection coefficient at a predetermined symbol position.

[0013] In one exemplary embodiment, before the reconfigurable intelligent surface or relay switches the reflected pilot signal to a new codebook at a predetermined symbol position, the base station notifies the terminal of the settings regarding the pilot signal, the pilot signal appears as a set of two pilot symbols, and the method further includes the step of setting one or more sets of pilot symbols.

[0014] In one exemplary embodiment, the two pilot symbols are consecutive symbols, or there is at most one pilot symbol between the two pilot symbols. The pilot signals of the two pilot symbols occupy the same RB, and the number of REs occupied in each RB is the same.

[0015] In one exemplary embodiment, the pilot signal is any one of DMRS, SSB, PRS, CSI-RS, SRS, and PTRS.

[0016] In one exemplary embodiment, before the reconfigurable intelligent surface or relay switches the reflected pilot signal to a new codebook at a predetermined symbol position, the base station sets or determines a parameter set for the reconfigurable intelligent surface or relay, the parameter set further including at least any one of a first parameter, a second parameter, and a third parameter, the first parameter being used to indicate the codebook reflection coefficient, the second parameter being used to indicate at which position of the pilot symbol the reconfigurable intelligent surface or relay performs codebook switching, and the third parameter being used to indicate the time when the reconfigurable intelligent surface or relay performs codebook switching, the time including at least any one of a time slot and a pilot symbol.

[0017] In one exemplary embodiment, the step in which the reconfigurable intelligent surface or relay switches the reflected pilot signal to a new codebook is a step in which the reconfigurable intelligent surface or relay switches the pilot signal from an old codebook to a new codebook at one of the two set pilot symbols, the new codebook being the product of multiplying the old codebook by the codebook reflection coefficient.

[0018] In one exemplary embodiment, after switching the pilot signal of the reflection channel to a new codebook at a predetermined symbol position and after the terminal or the base station receives the pilot signal, according to the codebook at different pilot symbols of the pilot signal, the method further includes separating the direct channel between the base station and the terminal and the reflection channel reflected by the reconfigurable intelligent surface or relay.

[0019] In one exemplary embodiment, after separating the direct channel and the reflected channel reflected by a reconfigurable intelligent surface or relay between the base station and the terminal, the terminal further includes the step of individually or collectively feeding back the measurement results of the direct channel and the reflected channel based on measurement feedback signaling.

[0020] In the steps described above, the reconfigurable intelligent surface or relay switches the reflected pilot signal to a new codebook at a predetermined symbol position according to a preset codebook reflection coefficient, thereby constructing code decomposition of the direct and reflected channels in the time domain. The terminal or base station then performs channel separation according to the received pilot signal, effectively separating the direct and reflected channels between the base station and the terminal. This solves the problem of mixed channels received at the base station or terminal in the prior art, improving positioning accuracy and enhancing performance in radio signal demodulation and positioning.

[0021] From the above description of the embodiments, it will be understood that the method according to the above embodiments can be implemented by adding a general-purpose hardware flap form necessary for the software, and can also be implemented by hardware, but in many cases it is preferable to implement it by the previous method. Based on this, the essence of the technical aspects of the present invention or a part that contributes to the prior art can be implemented in the form of a software product, and the computer software product is stored in a storage medium (for example, read-only memory / random access memory (ROM / RAM), magnetic disk, optical disk) that contains a plurality of instructions that cause a terminal device (which may be a mobile phone, computer, server, or network device, etc.) to execute the method according to each embodiment of the present invention.

[0022] In this embodiment, a channel isolation system is further provided, which is for realizing the above embodiment and preferred embodiments, and the description of parts already described is omitted. The term "module" as used below refers to a combination of software and / or hardware capable of realizing a predetermined function. While it is preferable to realize the devices described in the following embodiments in software, they can also be realized in hardware, or in combination of software and hardware.

[0023] Figure 3 is a block diagram of the configuration of a channel isolation system according to an embodiment of the present invention. As shown in Figure 3, the system includes a reconfigurable intelligent surface or relay 10, a base station 20, and a terminal 30.

[0024] The reconfigurable intelligent surface or relay 10 is located between the base station and the terminal and is configured to switch the reflected pilot signal to a new codebook at a predetermined symbol position according to a preset codebook reflection coefficient.

[0025] The base station 20 is configured to notify the terminal of the settings related to the pilot signal, and the pilot signal appears as a pair of two pilot symbols, and one or more pairs of pilot symbols are set.

[0026] The base station 20 or terminal 30 is further configured to receive the pilot signal and then separate the direct channel between the base station and the terminal from the reflected channel reflected by a reconfigurable intelligent surface or relay, according to the codebook of different pilot symbols of the pilot signal.

[0027] In one exemplary embodiment, the base station is configured to further set a parameter set on the reconfigurable intelligent surface or relay, or to arrange the parameter set with the reconfigurable intelligent surface or relay, wherein the parameter set further comprises the base station including a first parameter, a second parameter, and a third parameter, the first parameter being used to indicate the codebook reflectance coefficient, the second parameter being used to indicate at which pilot symbol position the reconfigurable intelligent surface or relay switches the codebook, and the third parameter being used to indicate the time for the reconfigurable intelligent surface or relay to switch the codebook, the time including at least one of a time slot and a pilot symbol.

[0028] In one exemplary embodiment, the terminal is further configured to provide feedback, either individually or collectively, of the measurement results of the direct channel and the reflective channel based on measurement feedback signaling.

[0029] Each of the above modules can be implemented in software or hardware. If implemented in hardware, all of the modules can be located on the same processor, or they can be located on different processors in any combination, but are not limited to these configurations.

[0030] To facilitate understanding of the technical aspects provided by the present invention, a detailed explanation will be provided below with reference to specific examples.

[0031] In embodiments of the present invention, a channel isolation method is provided in the presence of a reconfigurable intelligent surface, and a direct channel H between the base station and the terminal is provided. d And ChannelH reflected by a reconfigurable intelligent surface rThis method effectively separates the channels and improves performance in demodulation, positioning, and other functions. Figure 4 is a flowchart of a channel separation method according to an embodiment of the present invention when a reconfigurable intelligent surface is present. As shown in Figure 4, this method includes the following steps S401 to S405.

[0032] Step S401: The base station notifies the terminal of the pilot's configuration parameters. Specifically, for the pilot's setting parameters, one or more sets can be set, with two consecutive symbols in the time domain considered as one pair.

[0033] Step S402: The base station sets the parameter set for the Reconfigurable Intelligence Surface (RIS).

[0034] Specifically, this parameter set includes the following three parts: 1. The first parameter represents the codebook reflection coefficient, which can indicate that the RIS multiplies the entire codebook by a scalar. This parameter may be predetermined and defaults to -1.

[0035] 2. The second parameter indicates which orthogonal frequency division multiplexing (OFDM) symbol the RIS will switch its codebook for. This parameter may be predetermined; for example, it may typically default to switching for the second of two pilot symbols.

[0036] 3.3 The third parameter indicates the time slot and OFDM symbol in which the pilot signal appears.

[0037] Step S403: The base station or terminal transmits a pilot signal, and the RIS switches the codebook in response to the reflected pilot signal with the configured symbol.

[0038] Specifically, the new switched-out codebook is obtained by multiplying the original codebook by a specified scalar. For example, a 1-bit reconfigurable intelligent surface can multiply the codebook of the reconfigurable intelligent surface by -1 in the second pilot symbol of the reference signals of two consecutive symbols. In this embodiment, other forms of codebook coefficients can also be employed.

[0039] Step S404: After the terminal or base station receives the pilot signal, the base station separates the direct channel between the base station and the terminal from the reflected channel through the reconfigurable intelligent surface according to coefficients in different symbols of the reconfigurable intelligent surface set by the base station, and then performs operations such as channel estimation.

[0040] Step S405: If the terminal needs to report measurement results, double the terminal's resource overhead in the existing protocol or standard and report the measurement results for the direct channel and reflected channel, respectively.

[0041] Furthermore, in this embodiment, we will also describe the time domains under which the switching of RIS codebook coefficients can occur under the conditions in which two pilot symbols are set and under the conditions in which four pilot signals are set.

[0042] Specifically, in the case of a 2-symbol pilot, When two pilot symbols are set, the time-domain positions of the pilot symbols and the coefficients of the reconfigurable intelligent surface can be represented in Figure 5. Figure 5 shows 14 symbols (i.e., symbols 0-13) in one slot. Here, the location of the black box is the location of the pilot, and if there is a -1 in the box where this symbol exists, it means that the codebook of the reconfigurable intelligent surface at the time the symbol exists is the original codebook multiplied by -1.

[0043]

number

[0044] Specifically, in the case of a 4-symbol pilot, When four pilot symbols are set, the time-domain positions of the pilot symbols and the coefficients of the reconfigurable intelligent surface can be represented in Figure 6.

[0045]

number

[0046] Although the embodiments of this invention only show DMRS settings for 2 symbols and 4 symbols, there are various combinations of actual setting types. The objective of the embodiments of this invention is to achieve channel separation by having the RIS multiply its entire codebook by a single coefficient and constructing a sign partition of direct and reflected channels in the time domain.

[0047] The present invention further provides a method for downstream channel separation. Figure 7 is a flowchart of a downstream channel separation method according to an embodiment of the present invention, and as shown in Figure 7, this method includes the following steps S701 to S705.

[0048] Step S701: The base station notifies the terminal of the setting parameters for the downlink pilot signal.

[0049] Specifically, the pilot signal setting parameters can be set in sets of one or more, with each set consisting of two consecutive symbols in the time domain. For example, suppose pilot signals are set for symbols 2 and 3, and the parameters set by the base station to the terminal indicate that the reconfigurable intelligent surface multiplies symbol 3 to the entire codebook by -1, or that the base station and the terminal agree to multiply the second of the two consecutive pilot symbols by -1. The base station can also set up feedback from the terminal, which may request simultaneous feedback of channel measurement results for direct and reflected channels, including but not limited to parameters such as Reference Signal Receiving Power (RSRP), delay, and signal-to-interference power-to-noise ratio.

[0050] Step S702: The base station sets the parameter set in the RIS. Specifically, this parameter set includes the following three parts:

[0051] 1. The first parameter represents the codebook reflection coefficient, which can indicate that the RIS or relay multiplies its entire codebook by a scalar, which we assume here to be -1. This parameter may be predetermined and is not set by default.

[0052] 2. The second parameter indicates which symbols the RIS switches between in its codebook, for example, by multiplying the entire codebook by -1 from the starting position of symbol 3. This parameter may be predetermined and is not set by default.

[0053] 3.3 The third parameter indicates the time for switching the reconfigurable intelligent surface according to the instructions of the base station, and this time may be a specific time slot, a specific index of the time slot and OFDM symbol, or a specific time, but is not specifically limited here.

[0054] Step S703: The base station transmits a downlink pilot signal, and the reconfigurable intelligent surface multiplies the entire codebook of the starting position where it received symbol 3 by -1.

[0055] Step S704: After receiving the pilot signal, the terminal performs channel separation.

[0056]

number

[0057] Step S705: If the base station sends a signaling to the terminal requesting that it feed back the relevant measurements for the direct channel and the reflected channel, the terminal will require approximately twice the resource overhead to provide the feedback. The feedback for the direct channel and the reflected channel may be done together or individually.

[0058] In this embodiment, the base station sets parameters for the terminal, and these setting parameters must include setting parameters for the downlink pilot signal that the base station notifies the terminal of. The pilot signal must appear as a pair of two OFDM symbols, preferably consecutive symbols, and one or more pairs can be set. Considering the switching limitations of the RIS, if switching cannot be achieved in consecutive symbols, the distance between the two pilot symbols is at most one symbol. The pilots of the two symbols occupy the same RE and RB. The pilots here may be DMRS, SSB, PRS, CSI-RS, SRS, PTRS, etc., and all must appear simultaneously in both symbols.

[0059] In this example, a parameter indicating the RIS codebook switching coefficient is set on the terminal; here, it defaults to -1 and is optional. The new codebook after RIS switching is obtained by multiplying the set coefficient by the old RIS codebook.

[0060] In this embodiment, when a base station requests a terminal to perform feedback on the direct channel and reflected channel, such as RSRP or CSI feedback including signal-to-interference power-to-noise ratio, it is necessary to set up signaling to indicate whether the feedback is for the direct channel, the reflected channel, or both. The direct channel and reflected channel may be grouped together and fed back individually, or they may be fed back together.

[0061] In this example, the base station sets parameters in the RIS, and these setting parameters must include the following:

[0062] A parameter related to the codebook reflection coefficient. This parameter indicates that the RIS multiplies the entire codebook by a scalar, and defaults to -1. This setting parameter is optional. The base station transmits a downlink pilot signal, and the reconfigurable intelligent surface must switch to a new codebook at a given symbol location, where new codebook = set reflection coefficient * old codebook.

[0063] This parameter indicates which OFDM symbol the RIS switched codebooks within. The symbol location where the codebook switch occurred may also be predetermined. Due to the large number of pilot types, the predetermined default value should only apply to commonly used pilot signals. Because of the variety of pilot types and settings, this parameter is almost always not the default.

[0064] A parameter indicating the time at which the base station instructs a reconfigurable intelligent surface to switch over. This time may be a specific time slot, a specific index of a time slot + OFDM symbol, or a specific time, but is not specifically limited here.

[0065] In this embodiment, when the base station requests the terminal to feed back the channel measurement results, if both the direct channel and the reflected channel are fed back, the resource overhead of the feedback must be increased to twice the original amount. If it is not possible to distinguish between them, the terminal must inform the base station whether the feedback is from the direct channel, the reflected channel, both channels, or a combined channel.

[0066] An upstream channel separation method is further provided in embodiments of the present invention. Figure 8 is a flowchart of the upstream channel separation method according to embodiments of the present invention, and as shown in Figure 8, it includes the following steps S801 to S804.

[0067] Step S801: The base station notifies the terminal of the setting parameters for the downlink pilot signal.

[0068] Specifically, for setting pilot signals, one or more sets can be set, with two consecutive symbols in the time domain considered as one pair. Let's assume that pilots are set for symbol 2 and symbol 3.

[0069] Step S802: The base station sets the parameter set in the RIS. Specifically, this parameter set includes the following three parts:

[0070] 1. The first parameter represents the codebook reflection coefficient, which can indicate that the RIS multiplies the entire codebook by a scalar. This parameter does not need to be set and defaults to -1.

[0071] 2. The second parameter indicates which symbols the RIS switches between in its codebook, for example, by multiplying the entire codebook by -1 from the starting position of symbol 3. This parameter may be predetermined and is not set by default.

[0072] 3.3 The third parameter indicates the time at which the base station instructs the reconfigurable intelligent surface to switch over. This time may be a specific time slot, a specific index of the time slot and OFDM symbol, or a specific time, but is not specifically limited here.

[0073] Step S803: The terminal transmits an upwind pilot signal, and the reconfigurable intelligent surface multiplies the entire codebook of the starting position where symbol 3 was received by -1.

[0074] Step S804: After receiving the pilot signal, the base station performs channel separation.

[0075]

number

[0076] In this embodiment, the base station notifies the terminal of the setting parameters for the uplink pilot signal. The pilot must appear as a pair of two OFDM symbols, preferably consecutive symbols, and one or more pairs can be set. Considering the switching limitations of the RIS, if switching cannot be achieved with consecutive symbols, the two pilot symbols are separated by a maximum of one symbol. The pilots of the two symbols occupy the same RE and RB. The pilots here may be DMRS, SRS, etc., and both must appear simultaneously on both symbols.

[0077] In this example, the base station configures a set of parameters in the RIS, and these configuration parameters must include the following:

[0078] A parameter related to the codebook reflectance coefficient. This parameter indicates that the RIS multiplies the entire codebook by a scalar, and defaults to -1. This setting parameter is optional. The base station transmits an uplink pilot signal, and the reconfigurable intelligent surface needs to switch to a new codebook at a given symbolic position, where new codebook = set reflectance coefficient * old codebook.

[0079] This parameter indicates which OFDM symbol the RIS switched codebooks within. The symbol location where the codebook switch occurred may also be predetermined. Due to the large number of pilot types, the predetermined default value should only apply to commonly used pilot signals. Because of the variety of pilot types and settings, this parameter is almost always not the default.

[0080] A parameter indicating the time at which a base station instructs a reconfigurable intelligent surface to switch over. This time may be a specific time slot, a specific index of a time slot and OFDM symbol, or a specific time, but is not specifically limited to this.

[0081] In addition, the RIS in all of the above embodiments of the present invention may be replaced with a relay, and specific examples can be found in the examples described in the above embodiments and exemplary embodiments, and a detailed explanation is omitted in this embodiment.

[0082] According to the above-described embodiment of the present invention, the signaling interaction between the base station, the reconfigurable intelligent surface, and the terminal, and the codebook change of the reconfigurable intelligent surface, cause code decomposition in the time domain of the direct channel and the reflected channel through the reconfigurable intelligent surface at the receiving end, thereby enabling easy and effective separation of the direct channel and the reflected channel through the reconfigurable intelligent surface, and achieving objectives such as improving throughput and positioning accuracy.

[0083] In an embodiment of the present invention, a computer-readable storage medium is further provided, the computer-readable storage medium storing a computer program, and the computer program is configured to perform the steps of any of the above method embodiments when executed.

[0084] In one exemplary embodiment, the computer-readable storage medium described above may include, but is not limited to, various media capable of storing computer programs, such as USB drives, read-only memory (ROM), random access memory (RAM), portable hard disks, magnetic disks, or optical disks.

[0085] In embodiments of the present invention, an electronic device is further provided, which includes a memory and a processor, the memory storing a computer program, and the processor is configured to execute the computer program in order to perform the steps of any of the above method embodiments.

[0086] In one exemplary embodiment, the electronic device may further include a transmission device and an input / output device. The transmission device is connected to the processor, and the input / output device is connected to the processor.

[0087] Specific examples in this embodiment can be found in the examples described in the above embodiment and exemplary embodiment, and detailed explanations are omitted in this embodiment.

[0088] Those skilled in the art will understand that each module or step in the embodiments of the present invention described above can be implemented by a general-purpose computer, centralized on a single computer, or distributed across a network of multiple computers, or implemented by computer-executable program code stored in a memory device and executed by the computer, or the disclosed or described steps can be executed in an order different from the order described herein, or they can be manufactured on separate integrated circuit modules, or multiple modules or steps within them can be combined into a single integrated circuit module. Thus, the present invention is not limited to a specific combination of hardware and software.

[0089] The above are merely preferred embodiments of the present invention and do not limit it; those skilled in the art can make various modifications and variations to the present invention. All modifications, equivalent substitutions, improvements, etc., within the principles of the present invention are all within the scope of protection of the present invention.

Claims

1. A reconfigurable intelligent surface or relay located between a base station and a terminal switches the reflected pilot signal from an old codebook to a new codebook at a predetermined symbol position according to a preset codebook reflection coefficient, thereby constructing a code division of the direct channel between the base station and the terminal in the time domain and the reflected channel reflected by the reconfigurable intelligent surface or relay. Includes, The aforementioned pilot signal appears as a pair of two pilot symbols, and one or more pairs of pilot symbols are set. A channel separation method comprising the step of the reconfigurable intelligent surface or relay switching the reflected pilot signal at a predetermined symbol position from the old codebook to the new codebook according to a preset codebook reflection coefficient, the step of the reconfigurable intelligent surface or relay switching the pilot signal at one of two set pilot symbols from the old codebook to the new codebook, wherein the new codebook is the old codebook multiplied by the codebook reflection coefficient.

2. The reconfigurable intelligent surface or relay, before switching the reflected pilot signal to a new codebook at a predetermined symbol position, The method according to claim 1, further comprising the step of the base station notifying the terminal of the settings relating to the pilot signal.

3. The method according to claim 2, wherein the two pilot symbols are consecutive symbols, or are separated by at most one pilot symbol, the pilot signals of the two pilot symbols occupy the same RB, and the number of REs occupied in each RB is the same.

4. The method according to claim 1, wherein the pilot signal is one of DMRS, SSB, PRS, or CSI-RS.

5. The reconfigurable intelligent surface or relay, before switching the reflected pilot signal to a new codebook at a predetermined symbol position, The base station further comprises the step of setting or arranging a parameter set for the reconfigurable intelligent surface or relay, wherein the parameter set includes at least one of a first parameter, a second parameter, and a third parameter. The first parameter is used to indicate the codebook reflection coefficient, The second parameter is used to indicate at which pilot symbol position the reconfigurable intelligent surface or relay switches the codebook. The method according to claim 2, wherein a third parameter is used to indicate the time for the reconfigurable intelligent surface or relay to switch codebooks, the time comprising at least one of a time slot or a pilot symbol.

6. After switching the reflected pilot signal to a new codebook at a predetermined symbol position, The method according to claim 5, further comprising the step of separating the direct channel between the base station and the terminal from the reflected channel reflected by the reconfigurable intelligent surface or relay, in accordance with a codebook of different pilot symbols of the pilot signal after the terminal or base station has received the pilot signal.

7. After separating the direct channel between the base station and the terminal from the reflected channel reflected by the reconfigurable intelligent surface or relay, The method according to claim 6, further comprising the step of the terminal individually or collectively providing feedback of the measurement results of the direct channel and the reflective channel based on measurement feedback signaling.

8. A reconfigurable intelligent surface or relay located between a base station and a terminal, configured to switch reflected pilot signals from an old codebook to a new codebook at predetermined symbol positions according to a preset codebook reflection coefficient, thereby constructing a direct channel and a code decomposition of the reflected channel reflected by the reconfigurable intelligent surface or relay in the time domain between the base station and the terminal, Includes, The aforementioned pilot signal appears as a pair of two pilot symbols, and one or more pairs of pilot symbols are set. A channel separation system in which the reconfigurable intelligent surface or relay is configured to switch the pilot signal from the old codebook to the new codebook in one of two set pilot symbols, wherein the new codebook is the old codebook multiplied by the codebook reflection coefficient.

9. The base station is configured to notify the terminal of the settings relating to the pilot signal, further comprising The system according to claim 8.

10. The base station is further configured to set a parameter set on the reconfigurable intelligent surface or relay, or to agree on the parameter set with the reconfigurable intelligent surface or relay, wherein the parameter set includes a first parameter, a second parameter, and a third parameter. The first parameter is used to indicate the codebook reflection coefficient, The second parameter is used to indicate at which pilot symbol position the reconfigurable intelligent surface or relay switches the codebook. A third parameter is used to indicate the time for the reconfigurable intelligent surface or relay to switch codebooks, the time including at least one of a time slot or a pilot symbol. The system according to claim 9.

11. Further including the aforementioned terminal, The base station or terminal is further configured to, after receiving the pilot signal, separate the direct channel between the base station and the terminal from the reflected channel reflected by the reconfigurable intelligent surface or relay, according to the codebook of different pilot symbols in the pilot signal. The system according to claim 8.

12. The terminal is further configured to provide feedback, either individually or collectively, of the measurement results of the direct channel and the reflected channel based on measurement feedback signaling. The system according to claim 11.

13. A computer-readable storage medium storing a computer program that, when executed by a processor, enables the implementation of the steps of the method described in any one of claims 1 to 7.

14. An electronic device comprising memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor, upon execution of the computer program, realizes a step of the method according to any one of claims 1 to 7.

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