Demodulation reference signal configuration method and apparatus

Abstract

The present application provides a demodulation reference signal configuration method and apparatus. In the method, in response to an adjustment condition being met, a first base station determines configuration information of a reconfigurable intelligent surface device; the first base station sends the configuration information of the reconfigurable intelligent surface device to a terminal device; the terminal device determines a performance parameter on the basis of the configuration information; when it is determined that the performance parameter meets a demodulation reference signal configuration condition, the terminal device determines first index information; the terminal device sends, to the first base station, first adjustment information determined on the basis of the first index information; and on the basis of the first adjustment information, the first base station configures a demodulation reference signal according to an indicated demodulation reference signal configuration scheme. In this way, when determining that performance is affected by the reconfigurable intelligent surface device, the terminal device can adaptively determine an appropriate demodulation reference signal configuration scheme, thereby improving the accuracy of time-varying channel estimation and the throughput performance.

Description

A method and apparatus for configuring a demodulation reference signal

[0001] This application claims priority to Chinese Patent Application No. 202510085902.8, filed on January 17, 2025, entitled "A Method and Apparatus for Demodulating Reference Signals", the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of communication technology, and in particular to a method and apparatus for configuring a demodulation reference signal. Background Technology

[0003] A Reconfigurable Intelligent Surface (RIS) is a metamaterial surface capable of intelligently manipulating the wireless electromagnetic environment. By integrating numerous miniature antennas and electronic components onto its surface, it intelligently configures the wireless propagation environment and dynamically controls the electromagnetic beam, significantly improving the performance of wireless communication networks. Currently, RIS devices are deployed between base stations (BS) and terminal equipment. By adjusting and optimizing the phase and amplitude of the reflected electromagnetic beam, the RIS device achieves directional reflection of incident signals, thereby improving base station coverage and reducing signal blind spots.

[0004] Due to limited spectrum resources, the operating frequency bands of equipment from different operators are relatively close together. These closely spaced operating frequency bands are considered adjacent. The operating bandwidth of a RIS (Radio Frequency Reflector) device can encompass the operating frequency bands of equipment from multiple operators. For RIS devices deployed for base stations of a specific operator, adjacent base stations can also achieve beam reflection through the RIS device. For example, if a RIS device is deployed to cover the cell coverage of BS1 of operator A, BS2 of operator B, as an adjacent base station of BS1, can also reflect its transmitted beams to the same area through the RIS device.

[0005] Base stations can control the operational status of deployed RIS (Radio Responsibility Array) devices. During the base station's beam scanning phase, the RIS devices are in beam-switching mode; during the base station's downlink data transmission phase, the RIS devices are in beam-fixed mode. However, adjacent channel base stations cannot control the operational status of the RIS devices, which may result in the adjacent channel base station being in downlink data transmission while the RIS devices are in beam-switching mode. This causes the downlink channel of the adjacent channel base station to be time-varying, and the terminal equipment of the adjacent channel base station cannot accurately estimate the time-varying channel caused by the RIS devices, leading to a significant decrease in data transmission performance between the adjacent channel base station and the terminal equipment. Summary of the Invention

[0006] Based on this, this application provides a method and apparatus for configuring a demodulation reference signal to enable adjacent-channel terminal equipment to accurately estimate the time-varying channel caused by the RIS device, thereby improving the data transmission performance between adjacent-channel base stations and terminal equipment.

[0007] In a first aspect, embodiments of this application provide a method for configuring a demodulation reference signal, which is applied to a terminal device. The terminal device acquires configuration information of a smart reflective surface device sent by a first base station. The smart reflective surface device is controlled by an adjacent-channel base station of the first base station. Based on the configuration information of the smart reflective surface device, the terminal device determines performance parameters that characterize the performance of the terminal device. If the performance parameters meet the configuration conditions of the demodulation reference signal, it is determined that the performance of the terminal device is affected by the smart reflective surface device. The terminal device determines first index information. The first index information includes at least a first time slot index. The first time slot index indicates the time slot that needs adjustment. The terminal device sends first adjustment information to the first base station to indicate a demodulation reference signal configuration scheme. The first adjustment information is determined based on the first index information. Thus, the terminal device can effectively detect the interference effect of the smart reflective surface device on the performance of the terminal device based on the configuration information of the smart reflective surface device and the performance parameters of the terminal device. Furthermore, the terminal device accurately determines the time slot affected by the interference. By adopting a suitable demodulation reference signal configuration scheme, the accuracy of time-varying channel estimation and throughput performance are improved.

[0008] In one possible implementation, the terminal device determines m time slots in the physical downlink shared channel with a decoding rate lower than a decoding rate threshold, and n symbols in the m time slots with adjacent phase differences greater than a phase difference threshold. Here, m and n are both positive integers. The terminal device determines a second duration for consecutive symbols within the n symbols. The second duration is a performance parameter. The second duration reflects the duration of phase abrupt changes, indicating the impact of the smart reflective surface device on the terminal device. Correspondingly, the configuration information of the smart reflective surface device includes the first duration of the beam during beam scanning. The demodulation reference signal configuration condition is that the second duration equals the first duration. That is, when the second duration is equal to the first duration, it can be determined that the phase abrupt change is caused by the smart reflective surface device. The second duration can accurately measure the phase abrupt change. Based on the second duration, the interference effect of the reflective surface device on the terminal device can be detected more effectively.

[0009] In one possible implementation, the first index information includes the first time slot index of m time slots and the first symbol index of n symbols. This allows for a more accurate determination of the time slots and symbols that need adjustment.

[0010] In one possible implementation, the terminal device sends indication information to the first base station. The indication information includes the optimal beam and a first time slot index of m time slots. The indication information instructs the first base station to transmit data with the optimal beam in time slots other than the m time slots. In these other time slots, there is no interference from the smart reflective surface device, eliminating the need to adjust the demodulation reference signal configuration scheme and reducing the cost of adjusting the demodulation reference signal configuration scheme.

[0011] In one possible implementation, when n is greater than a symbol count threshold and m is less than or equal to a time slot count threshold, the terminal device sends first information to the first base station. The first information includes a first identifier. The first identifier is used to instruct the first base station to map demodulation reference signal pilots onto each symbol within the m time slots. This allows for a time slot-granular demodulation reference signal configuration scheme when the number of symbols requiring adjustment is large and the number of time slots is small.

[0012] When n is less than or equal to the symbol count threshold, the terminal device sends second information to the first base station. The second information includes a first symbol index for the n symbols and a second identifier. The second identifier instructs the first base station to map demodulation reference signal pilots across the n symbols in the m time slots. This allows for a symbol-level demodulation reference signal configuration scheme when the number of symbols requiring adjustment is small, saving pilot resources.

[0013] In one possible implementation, when n is greater than the symbol count threshold and m is greater than the time slot count threshold, the terminal device adjusts the decoding rate threshold until it is determined that n is less than or equal to the symbol count threshold, and / or m is determined to be less than or equal to the time slot count threshold. This allows for the selection of a suitable demodulation reference signal configuration scheme based on the adjusted values ​​of n and m, achieving adaptive adjustment of the demodulation reference signal configuration scheme according to the scenario.

[0014] In one possible implementation, the configuration information of the smart reflective surface device includes a target frame number. A target frame is determined based on the target frame number. The target frame is the frame representing the target frame number after the terminal device receives the configuration information of the smart reflective surface device. The terminal device determines the throughput within the target frame. The throughput within the target frame is a performance parameter.

[0015] In one possible implementation, the demodulation reference signal is configured such that the throughput is greater than or equal to a throughput threshold. A throughput greater than or equal to the throughput threshold indicates that the performance of the terminal device has improved after controlling the operating state of the intelligent reflective surface device, suggesting that the intelligent reflective surface device has a certain impact on the performance of the terminal device.

[0016] In one possible implementation, the terminal device determines a first time slot index for m time slots within the physical downlink shared channel, where the decoding rate is below a decoding rate threshold, and a first symbol index for n symbols within the m time slots, where the adjacent phase difference is greater than a phase difference threshold. The first index information determined by the terminal device includes the first time slot index for the m time slots and the first symbol index for the n symbols. This facilitates accurate estimation of signals with phase abrupt changes based on the first index information.

[0017] In one possible implementation, when m is less than or equal to a threshold number of time slots, the terminal device sends third information to the first base station. The third information includes a first time slot index and a third identifier for the m time slots. The third identifier instructs the first base station to map demodulation reference signal pilots across each symbol within the m time slots. This allows for a symbol-level demodulation reference signal configuration scheme when the number of symbols requiring adjustment is small, thus saving pilot resources.

[0018] When m is greater than the threshold for the number of time slots, the terminal device sends fourth information to the first base station. The fourth information includes the first time slot index of the m time slots, the first symbol index of the n symbols, and a fourth identifier. The fourth identifier is used to instruct the first base station to map demodulation reference signal pilots in the m time slots, including the first symbol of each time slot and the n symbols. This allows for a symbol-level demodulation reference signal configuration scheme, including configuration of the demodulation reference signal for the first symbol, even when the number of time slots requiring adjustment is large. This improves the accuracy of channel estimation while conserving pilot resources.

[0019] In one possible implementation, the terminal device determines that the index adjustment conditions are met, determines second index information, and sends second adjustment information to the first base station. The second adjustment information is determined based on the second index information. The second adjustment information is used to instruct the first base station to execute a demodulation reference signal configuration scheme according to the second index information. The index adjustment conditions can trigger the terminal device to adjust the index, enabling a more flexible adjustment of the demodulation reference signal configuration scheme.

[0020] Secondly, embodiments of this application provide a method for configuring a demodulation reference signal, applicable to a first base station. Under certain adjustment conditions, the first base station determines the configuration information of a smart reflective surface device. The smart reflective surface device is controlled by a second base station. The frequency band of the second base station is adjacent to that of the first base station. The first base station sends the configuration information of the smart reflective surface device to a terminal device, enabling the terminal device to detect whether the smart reflective surface device interferes with it based on the configuration information. The first base station obtains first adjustment information sent by the terminal device. Based on the first adjustment information, the first base station configures the demodulation reference signal according to the demodulation reference signal configuration scheme indicated by the first adjustment information. This allows for adaptive determination of a suitable demodulation reference signal configuration scheme based on channel changes, thereby improving the accuracy and throughput performance of time-varying channel estimation.

[0021] In one possible implementation, the configuration information of the smart reflective surface device includes a first duration. The first duration is obtained from a second base station. The first base station sends a first request message to other base stations. The first request message instructs the base station controlling the smart reflective surface device to provide its configuration information. Based on the first request message, the first base station can determine the second base station. The first base station obtains the configuration information of the smart reflective surface device sent by the second base station. The configuration information of the smart reflective surface device includes the first duration of the beam of the smart reflective surface device during beam scanning.

[0022] In one possible implementation, the configuration information of the smart reflective surface device includes a target number of frames. The target number of frames is, for example, a preset value. The first base station acquires the target number of frames.

[0023] In one possible implementation, the first base station sends a first indication message to the second base station. The first indication message instructs the second base station to control the smart reflective surface device to stop beam scanning within subsequent target frames and transmit data using the target beam. The target beam is the beam used by the second base station during the data transmission phase of this frame. In this way, the first base station can control the smart reflective surface device to switch its operating state via the second base station, enabling the terminal device to perform performance testing.

[0024] In one possible implementation, the first base station acquires second indication information sent by the terminal device. The second indication information includes an optimal beam and a first time slot index of m time slots. The m time slots are the m time slots included in the physical downlink shared channel whose decoding rate is below a decoding rate threshold. The first base station transmits data using the optimal beam in the time slots other than the m time slots. In the other time slots, it is not affected by interference from the smart reflective surface device, and there is no need to adjust the demodulation reference signal configuration scheme, reducing the cost of adjusting the demodulation reference signal configuration scheme.

[0025] In one possible implementation, the first adjustment information is first information. The first information includes a first symbol index and a first identifier for n symbols. The n symbols are n symbols within m time slots whose adjacent phase difference is greater than a phase difference threshold. The m time slots are m time slots within the physical downlink shared channel whose decoding rate is lower than a decoding rate threshold. The first identifier is used to indicate mapping demodulation reference signal pilots on the n symbols within the m time slots. The first base station maps demodulation reference signal pilots on the n symbols within the m time slots. Alternatively, the first adjustment information is second information including a second identifier, which indicates mapping demodulation reference signal pilots on each symbol within the m time slots. The first base station maps demodulation reference signal pilots on each symbol within the m time slots.

[0026] In one possible implementation, the first adjustment information is the third information. The third information includes a first time slot index and a third identifier for m time slots. The m time slots are the m time slots included in the physical downlink shared channel with a decoding rate lower than the decoding rate threshold. The third identifier is used to indicate the mapping of demodulation reference signal pilots on each symbol included in the m time slots.

[0027] The first base station maps demodulation reference signal pilots on each symbol included in the m time slots.

[0028] Alternatively, the first adjustment information can be the fourth information. The fourth information includes the first time slot index of m time slots, the first symbol index of n symbols, and a fourth identifier. The m time slots are the m time slots included in the physical downlink shared channel with a decoding rate lower than the decoding rate threshold. The n symbols are the n symbols included in the m time slots with an adjacent phase difference greater than the phase difference threshold. The fourth identifier is used to indicate the first symbol and the n symbols mapped to the demodulation reference signal pilot in the m time slots. The first symbol and the n symbols included in the m time slots by the first base station are mapped to the demodulation reference signal pilot.

[0029] In one possible implementation, the adjustment conditions include any one of the following:

[0030] The throughput of the terminal device is less than the throughput threshold; after configuring the demodulation reference signal according to the demodulation reference signal configuration scheme indicated by the first adjustment information, the duration for which the throughput of the terminal device is greater than the throughput threshold is greater than a preset duration; after configuring the demodulation reference signal according to the demodulation reference signal configuration scheme indicated by the first adjustment information, the duration for which the throughput of the terminal device is less than the throughput threshold is greater than the preset duration. This enables the reconfiguration of the demodulation reference signal to improve the performance of the terminal device when its performance does not meet requirements or when its performance degrades after adjustment.

[0031] In one possible implementation, a first base station acquires second adjustment information sent by a terminal device. The second adjustment information is determined based on second index information. The second index information includes at least a second timeslot index. The second adjustment information instructs the execution of a demodulation reference signal configuration scheme according to the second index information. The first base station configures the demodulation reference signal according to the demodulation reference signal configuration scheme based on the second adjustment information. This allows for more flexible adjustment of the demodulation reference signal configuration scheme based on the operating conditions of the terminal device.

[0032] Thirdly, this application provides a communication device applied to the terminal device described in the first aspect above. The device includes: a receiving unit, configured to acquire configuration information of a smart reflective surface device transmitted by a first base station, wherein the smart reflective surface device is controlled by a second base station, and the frequency band of the second base station is adjacent to the frequency band of the first base station; a processing unit, configured to determine performance parameters based on the configuration information of the smart reflective surface device; the processing unit is further configured to determine first index information in response to determining that the performance parameters meet demodulation reference signal configuration conditions, wherein the first index information includes at least a first time slot index; and a sending unit, configured to send first adjustment information to the first base station, wherein the first adjustment information is determined based on the first index information, and the first adjustment information is used to instruct the first base station to execute a demodulation reference signal configuration scheme according to the first index information.

[0033] In one possible implementation, the processing unit is configured to determine performance parameters based on the configuration information of the smart reflective surface device, including: the processing unit is configured to determine a first time slot index of m time slots in the physical downlink shared channel with a decoding rate lower than a decoding rate threshold, where m is a positive integer; determine n symbols in the m time slots with an adjacent phase difference greater than a phase difference threshold, where n is a positive integer; determine a second duration of consecutive symbols in the n symbols, where the performance parameter is the second duration; the configuration information of the smart reflective surface device includes a first duration of the beam of the smart reflective surface device during beam scanning, and the demodulation reference signal configuration condition is that the second duration is equal to the first duration.

[0034] In one possible implementation, the first index information includes the first time slot index of the m time slots and the first symbol index of the n symbols.

[0035] In one possible implementation, the transmitting unit is further configured to transmit indication information to the first base station, the indication information including an optimal beam and a first time slot index of the m time slots, the indication information being used to instruct the first base station to transmit data with the optimal beam in time slots other than the m time slots.

[0036] In one possible implementation, the transmitting unit is configured to transmit first adjustment information to the first base station, comprising: the transmitting unit being configured to transmit first information to the first base station in response to determining that n is greater than the symbol count threshold and m is less than or equal to the time slot count threshold, the first information including a first identifier, the first identifier being configured to instruct the first base station to map demodulation reference signal pilots on each symbol included in the m time slots; and in response to determining that n is less than or equal to the symbol count threshold, transmitting second information to the first base station, the second information including a first symbol index of the n symbols and a second identifier, the first identifier being configured to instruct the first base station to map demodulation reference signal pilots on the n symbols in the m time slots.

[0037] In one possible implementation, the processing unit is further configured to adjust the decoding rate threshold in response to determining that n is greater than the symbol count threshold and m is greater than the time slot count threshold, until it is determined that n is less than or equal to the symbol count threshold, and / or that m is less than or equal to the time slot count threshold.

[0038] In one possible implementation, the configuration information of the intelligent reflective surface device includes a target number of frames. The processing unit is configured to determine performance parameters based on the configuration information of the intelligent reflective surface device, including: the processing unit is configured to determine the throughput within the target frame, wherein the target frame is a frame representing the target number of frames after the terminal device receives the configuration information of the intelligent reflective surface device.

[0039] In one possible implementation, the demodulation reference signal is configured such that the throughput is greater than or equal to a throughput threshold.

[0040] In one possible implementation, the processing unit is configured to determine first index information, including: the processing unit is configured to determine a first time slot index for m time slots in the physical downlink shared channel whose decoding rate is lower than a decoding rate threshold; and to determine a first symbol index for n symbols in the m time slots whose adjacent phase difference is greater than a phase difference threshold, wherein the first index information includes the first time slot index of the m time slots and the first symbol index of the n symbols.

[0041] In one possible implementation, the transmitting unit is configured to transmit first adjustment information to the first base station, comprising: the transmitting unit being configured to, in response to determining that m is less than or equal to a time slot number threshold, transmit third information to the first base station, the third information including a first time slot index and a third identifier of the m time slots, the third identifier being used to instruct the first base station to map demodulation reference signal pilots on each symbol included in the m time slots; and in response to determining that m is greater than the time slot number threshold, transmit fourth information to the first base station, the fourth information including a first time slot index of the m time slots, a first symbol index of the n symbols, and a fourth identifier, the fourth identifier being used to instruct the first base station to map demodulation reference signal pilots on the first symbol of each time slot and the n symbols in the m time slots.

[0042] In one possible implementation, the processing unit is further configured to determine that the index adjustment conditions are met and to determine the second index information; the sending unit is further configured to send the second adjustment information to the first base station, the second adjustment information being determined based on the second index information, and the second adjustment information being used to instruct the first base station to execute a demodulation reference signal configuration scheme according to the second index information.

[0043] Fourthly, embodiments of this application provide a demodulation reference signal configuration apparatus. The apparatus is applied to a first base station and includes: a processing unit, configured to determine configuration information of a smart reflective surface device in response to satisfying adjustment conditions, wherein the smart reflective surface device is controlled by a second base station, and the frequency band of the second base station is adjacent to the frequency band of the first base station; a transmitting unit, configured to transmit the configuration information of the smart reflective surface device to a terminal device; and a receiving unit, configured to acquire first adjustment information transmitted by the terminal device, wherein the first adjustment information is determined based on first index information, the first index information including at least a first time slot index, and the first adjustment information instructing the execution of a demodulation reference signal configuration scheme according to the first index information; the processing unit is further configured to configure the demodulation reference signal according to the first adjustment information and the demodulation reference signal configuration scheme.

[0044] In one possible implementation, the processing unit is configured to determine the configuration information of the intelligent reflective surface device, including: the processing unit is configured to send a first request message to other base stations, the first request message being used to instruct the base station controlling the intelligent reflective surface device to provide feedback on the configuration information of the intelligent reflective surface device; the processing unit is configured to obtain the configuration information of the intelligent reflective surface device sent by the second base station, the configuration information of the intelligent reflective surface device including a first duration of the beam during beam scanning of the intelligent reflective surface device.

[0045] In one possible implementation, the processing unit is configured to determine the configuration information of the intelligent reflective surface device, including: the processing unit is configured to acquire a target number of frames, wherein the configuration information of the RIS device includes the target number of frames.

[0046] In one possible implementation, the transmitting unit is further configured to send first indication information to the second base station, the first indication information being configured to instruct the second base station to control the intelligent reflective surface device to stop beam scanning within the subsequent target frame number and transmit data with the target beam, the target beam being the beam used by the second base station in the current frame data transmission phase.

[0047] In one possible implementation, the receiving unit is further configured to acquire second indication information sent by the terminal device, the second indication information including an optimal beam and a first time slot index of m time slots, wherein the m time slots are m time slots included in the physical downlink shared channel with a decoding rate lower than a decoding rate threshold; the processing unit is further configured to transmit data in time slots other than the m time slots using the optimal beam.

[0048] In one possible implementation, the first adjustment information is first information, which includes a first symbol index and a first identifier for n symbols. The n symbols are n symbols in m time slots whose adjacent phase difference is greater than a phase difference threshold. The m time slots are m time slots in the physical downlink shared channel whose decoding rate is lower than a decoding rate threshold. The first identifier is used to indicate that demodulation reference signal pilots are mapped on the n symbols in the m time slots. The processing unit is used to configure the demodulation reference signal according to the first adjustment information and the demodulation reference signal configuration scheme, including mapping demodulation reference signal pilots on the n symbols in the m time slots. Alternatively, the first adjustment information is second information, which includes a second identifier. The second identifier is used to indicate that demodulation reference signal pilots are mapped on each symbol in the m time slots. The processing unit is used to configure the demodulation reference signal according to the first adjustment information and the demodulation reference signal configuration scheme, including mapping demodulation reference signal pilots on each symbol in the m time slots.

[0049] In one possible implementation, the first adjustment information is third information, which includes a first time slot index and a third identifier for m time slots, wherein the m time slots are the m time slots included in the physical downlink shared channel with a decoding rate lower than a decoding rate threshold, and the third identifier is used to indicate the mapping of demodulation reference signal pilots on each symbol included in the m time slots; the processing unit is configured to configure the demodulation reference signal according to the first adjustment information and the demodulation reference signal configuration scheme, including: the processing unit is configured to map demodulation reference signal pilots on each symbol included in the m time slots; or, the first adjustment information is fourth information, which includes m... The processing unit is configured to configure the demodulation reference signal according to the first adjustment information and the demodulation reference signal configuration scheme, including: the first time slot index of the time slot, the first symbol index of the n symbols, and the fourth identifier. The m time slots are the m time slots with a decoding rate lower than the decoding rate threshold included in the physical downlink shared channel. The n symbols are the n symbols included in the m time slots with an adjacent phase difference greater than the phase difference threshold. The fourth identifier is used to indicate the first symbol included in the m time slots and the n symbols mapped to the demodulation reference signal pilot.

[0050] In one possible implementation, the adjustment conditions include any one of the following: the throughput of the terminal device is less than a throughput threshold; after configuring the demodulation reference signal according to the demodulation reference signal configuration scheme indicated by the first adjustment information, the duration for which the throughput of the terminal device is greater than the throughput threshold is greater than a preset duration; after configuring the demodulation reference signal according to the demodulation reference signal configuration scheme indicated by the first adjustment information, the duration for which the throughput of the terminal device is less than the throughput threshold is greater than the preset duration.

[0051] In one possible implementation, the receiving unit is further configured to acquire second adjustment information sent by the terminal device, the second adjustment information being determined based on second index information, the second index information including at least a second time slot index, the second adjustment information indicating the execution of a demodulation reference signal configuration scheme according to the second index information; the processing unit is further configured to configure a demodulation reference signal according to the demodulation reference signal configuration scheme based on the second adjustment information.

[0052] Fifthly, this application provides a communication device including at least one processor coupled to a memory.

[0053] In one example, the processor is configured to execute the method that implements the first aspect or any possible implementation of the first aspect. For example, the memory is configured to store a program or instructions; the at least one processor is configured to execute the program or instructions to cause the apparatus to implement the method that implements the first aspect or any possible implementation of the first aspect.

[0054] In yet another example, the processor is configured to execute the method that implements the second aspect or any possible implementation thereof. For example, the memory is configured to store a program or instructions; the at least one processor is configured to execute the program or instructions to cause the apparatus to implement the method that implements the second aspect or any possible implementation thereof.

[0055] Sixthly, this application provides a communication device including at least one logic circuit and an input / output interface.

[0056] In one example, the logic circuit is used to perform the method described in the first aspect and any of its possible implementations as described above.

[0057] In yet another example, the logic circuit is used to perform the method described in the second aspect described above and any of its possible implementations.

[0058] In a seventh aspect, this application provides a computer-readable storage medium for storing one or more computer-executable instructions, which, when executed by a processor, perform the method as described in any of the possible implementations of any of the first to second aspects described above.

[0059] Eighthly, this application provides a computer program product (or computer program) that, when executed by a processor, performs a method of any possible implementation of any one of the first to second aspects described above.

[0060] Ninthly, this application provides a chip system including at least one processor for supporting a communication device in implementing the functions involved in any possible implementation of any of the first to second aspects described above.

[0061] In one possible design, the chip system may further include a memory for storing program instructions and data necessary for the communication device. The chip system may be composed of chips or may include chips and other discrete devices. Optionally, the chip system may also include interface circuitry that provides program instructions and / or data to the at least one processor.

[0062] In a tenth aspect, this application provides a communication system comprising: a terminal device performing the methods described in the first aspect and any one of the first aspects above, and a first base station performing the methods described in the second aspect and any one of the second aspects above.

[0063] The technical effects of any of the design methods in aspects three through ten can be found in the first and second aspects and their different design methods mentioned above, and will not be repeated here. Attached Figure Description

[0064] Figure 1 is a schematic diagram of a communication system provided in an embodiment of this application;

[0065] Figure 2 is a schematic diagram of a frame structure considering RIS beam scanning requirements provided in an embodiment of this application;

[0066] Figure 3 is a schematic diagram of a frame structure provided in an embodiment of this application;

[0067] Figure 4 is a schematic diagram of another frame structure provided in an embodiment of this application;

[0068] Figure 5 is a downlink data signal demodulation constellation diagram provided in an embodiment of this application;

[0069] Figure 6 is a schematic diagram of a DMRS pilot configuration provided in the application embodiment;

[0070] Figure 7 is a schematic diagram of a communication system architecture according to this application;

[0071] Figure 8 is an interactive schematic diagram of a method for configuring a demodulation reference signal according to an embodiment of this application;

[0072] Figure 9 is a schematic diagram of an initial DMRS configuration scheme provided in an embodiment of this application;

[0073] Figure 10 is a schematic diagram of a DMRS configuration scheme provided in an embodiment of this application;

[0074] Figure 11 is a schematic diagram of another DMRS configuration scheme provided in the embodiments of this application;

[0075] Figure 12 is a schematic diagram of another DMRS configuration scheme provided in the embodiments of this application;

[0076] Figure 13 is an interactive schematic diagram of another method for configuring a demodulation reference signal provided in an embodiment of this application;

[0077] Figure 14 is a flowchart illustrating a method for configuring a demodulation reference signal according to an embodiment of this application;

[0078] Figure 15 is an interaction flowchart of a first base station, a second base station and a terminal device provided in an embodiment of this application;

[0079] Figure 16 is a flowchart illustrating another method for configuring a demodulation reference signal according to an embodiment of this application;

[0080] Figure 17 is an interaction flowchart of a first base station, a second base station and a terminal device provided in an embodiment of this application;

[0081] Figures 18-21 are schematic diagrams of the structure of a communication device provided in an embodiment of this application. Detailed Implementation

[0082] To facilitate understanding of the technical solutions provided in this application, the technical background involved in this application will be explained below.

[0083] Referring to Figure 1, this figure is a schematic diagram of a communication system provided in an embodiment of this application. User Equipment (UE) 1 is located in a weak coverage area of ​​BS1, such as coverage area 1. UE2 is located in a weak coverage area of ​​BS2. BS1 enhances coverage in the area where UE1 is located through cooperation with the RIS device. BS2 is an adjacent channel base station of BS1. The beam transmitted by BS2 can cover UE2 through the RIS device.

[0084] BS1 controls the operating state of the RIS device. When BS1 is in the beam scanning phase, the RIS device is in the beam switching state. Figure 2 shows a schematic diagram of a frame structure considering RIS beam scanning requirements. In the figure, 0 represents the Synchronization Signal Block Beam (SSB Beam). 1 represents the Channel State Information-Reference Signal (CSI-RS) beam. 2 represents the Physical Downlink Shared Channel (PDSCH). 3 represents the Physical Uplink Shared Channel (PUSCH). 4 represents the DMRS.

[0085] Taking Channel State Information-Reference Signal (CSI-RS) beam scanning as an example, each CSI-RS beam lasts for 3 symbols. During beam switching, the coverage area 1 of the RIS device continuously switches beams within the scanning period. UE1 selects the optimal beam based on the principle of maximizing received signal energy and feeds it back to BS1. BS1 controls the RIS device to consistently reflect this optimal beam during the downlink data transmission phase, thus maximizing UE1 performance.

[0086] For adjacent-channel base station BS2, the operating state of the RIS device is uncontrolled. Referring to Figure 3, if the phases of BS2 and BS1 completely overlap, their time slots are perfectly aligned. When BS2 is in the downlink data transmission phase, the RIS device is in a fixed-beam state. The signal transmitted by BS2 can be reflected back to UE2 when the RIS device is in a fixed-beam state. UE2 can passively gain performance gains. In another case, as shown in Figure 4, if the phases of BS2 and BS1 do not completely overlap, the RIS device is in a beam-switching state when BS2 is in the downlink data transmission phase. Within time T, the downlink channel of BS2 is time-varying. Because the density of the Demodulation Reference Signal (DMRS) is limited during data transmission, it is only periodically placed on a small number of specific symbols. UE2 uses time-domain extrapolation based on the DMRS to estimate the channel for other symbols. If a channel change occurs on a symbol other than the one where the DMRS is placed, UE2 will be unable to accurately estimate the time-varying channel, resulting in a significant decrease in demodulation performance.

[0087] For example, the DMRS is periodically placed on symbols 2 and 11. UE2 uses the DMRS pilots on symbols 2 and 11 for channel estimation. The first 7 symbols use the time-domain extrapolation of the channel estimate on symbol 2, and the last 7 symbols use the time-domain extrapolation of the channel estimate on symbol 11. Since each CSI-RS beam lasts for 3 symbols, the channel between BS2 and UE2 changes every 3 symbols due to the RIS beam switching. See Figure 5, which is a downlink data signal demodulation constellation diagram provided in this embodiment. After time-domain extrapolation based on the DMRS placed on symbol 2, the channel between BS2 and UE2 changes again starting from symbol 5, with significant channel changes from symbol 5 to symbol 10. Time-domain extrapolation based solely on the DMRS placed on symbols 2 and 11 cannot achieve accurate channel estimation, cannot meet decoding requirements, and causes a decrease in demodulation performance.

[0088] Currently, methods to improve the accuracy of channel estimation for time-varying channels mainly target high-speed mobile scenarios of terminal devices. When terminal devices move at high speeds, Doppler shift occurs, leading to channel changes. When the coherent reception window length caused by the Doppler shift is less than the DMRS interval, the accuracy of channel estimation decreases. By increasing the number of DMRS symbols configured in a time slot, frequency offset can be estimated and compensated, enabling the detection of channel continuity changes caused by the high-speed movement of terminal devices. For example, as shown in Figure 6, the pre-pilot refers to the first pilot symbol appearing. Additional pilots are more pilot symbols configured within the scheduling duration. Additional pilots are used to improve the estimation accuracy of channel time-varying characteristics. By configuring additional pilots in the time domain, the problem of decreased channel time correlation caused by Doppler shift can be solved. For example, as shown in Figure 6, Figure (a) is a schematic diagram without additional DMRS symbols. Figures (b)-(d) are schematic diagrams with 1-3 additional DMRS symbols configured in a time slot, respectively.

[0089] However, adding additional pilots cannot solve the problem of inaccurate channel estimation caused by channel time-varying characteristics induced by RIS devices. For downlink channels of adjacent-channel base stations, the beam switching of RIS devices is abrupt, and data transmission performance can only be improved by accurately estimating the channel abrupt changes at the corresponding time-frequency locations. Adjacent-channel terminal equipment cannot determine the beam switching time of RIS devices, and the time-frequency locations affected by RIS devices are random. Adding fixed additional pilots may fail to detect the locations of channel abrupt changes, thus failing to effectively solve the problem of inaccurate channel estimation, and also leading to wasted resources and reduced spectrum efficiency.

[0090] Based on this, this application provides a method for configuring a demodulation reference signal. In response to meeting adjustment conditions, a first base station determines configuration information for a smart reflective surface device (RIS). The smart reflective surface device is controlled by a second base station, which is an adjacent-channel base station of the first base station. The first base station sends the configuration information of the smart reflective surface device to a terminal device. The terminal device obtains the configuration information. The terminal device determines performance parameters based on the configuration information of the smart reflective surface device. The performance parameters reflect whether the terminal device is affected by the RIS device. If the performance parameters meet the demodulation reference signal configuration conditions, the terminal device determines first index information. The first index information includes at least a first time slot index. The terminal device sends first adjustment information determined based on the first index information to the first base station. The first adjustment information instructs the first base station to execute a demodulation reference signal configuration scheme according to the first index information. The first base station obtains the first adjustment information and configures the demodulation reference signal according to the indicated demodulation reference signal configuration scheme. Thus, when the terminal device determines that its performance is affected by the RIS device, it can adaptively determine a suitable demodulation reference signal configuration scheme based on channel changes, thereby improving the accuracy and throughput performance of time-varying channel estimation.

[0091] This application can be applied to various communication systems, such as 5th generation (5G) systems or New Radio (NR) systems, satellite communication systems, Long Term Evolution (LTE) systems, and Non-Terrestrial Network (NTN) systems. This application can also be applied to future communication systems, such as 6th generation mobile communication systems. This application can also be applied to device-to-device (D2D) communication, vehicle-to-everything (V2X) communication, machine-to-machine (M2M) communication, machine-type communication (MTC), and Internet of Things (IoT) communication systems or other communication systems.

[0092] The communication system architecture of this application is illustrated in Figure 7. This wireless communication system includes at least two network devices, such as network device 111 and network device 112 shown in Figure 7. The wireless communication system also includes at least two terminal devices, such as terminal device 121 and terminal device 122 shown in Figure 7. The wireless communication system further includes at least one RIS device, such as RIS device 130. RIS device 130 is controlled by network device 111. Network device 111 communicates with terminal device 121 through cooperation with RIS device 130. Network device 112 and network device 111 are adjacent-channel devices. Network device 112 communicates with terminal device 122 through RIS device 130.

[0093] Terminal equipment in a communication system can be referred to as user equipment (UE), access terminal, user unit, user station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication equipment, user agent, or user device. Terminal equipment can be a device that provides voice / data connectivity to a user, such as a handheld device with wireless connectivity or an in-vehicle device. Currently, examples of terminals include: mobile phones, tablets, laptops, PDAs, mobile internet devices (MIDs), wearable devices, virtual reality (VR) devices, augmented reality (AR) devices, wireless terminals in industrial control, wireless terminals in autonomous driving, wireless terminals in remote medical surgery, wireless terminals in smart grids, wireless terminals in transportation safety, wireless terminals in smart cities, wireless terminals in smart homes, cellular phones, cordless phones, session initiation protocol (SIP) phones, wireless local loop (WLL) stations, personal digital assistants (PDAs), handheld devices with wireless communication capabilities, computing devices or other processing devices connected to a wireless modem, wearable devices, terminal devices in 5G networks, or future public land mobile communication networks. The embodiments of this application do not limit the terminal devices in a network (PLMN), etc. In vehicle-to-everything (V2X) communication, the communication terminal on the vehicle is a type of terminal device, and the roadside unit (RSU) can also be considered a type of terminal device. A drone carrying a communication terminal can also be regarded as a type of terminal device.

[0094] Terminal devices can also be wearable devices. Wearable devices, also known as wearable smart devices, are a general term for devices that utilize wearable technology to intelligently design and develop everyday wearables, such as glasses, gloves, watches, clothing, and shoes. Wearable devices are portable devices that are worn directly on the body or integrated into the user's clothing or accessories. Wearable devices are not just hardware devices, but also achieve powerful functions through software support, data interaction, and cloud interaction. Broadly speaking, wearable smart devices include those that are feature-rich, large in size, and can achieve complete or partial functions without relying on a smartphone, such as smartwatches or smart glasses, as well as those that focus on a specific application function and require the use of other devices such as smartphones, such as various smart bracelets and smart jewelry for vital sign monitoring.

[0095] Terminal devices can also be terminal devices in Internet of Things (IoT) systems. IoT is an important part of the future development of information technology. Its main technical feature is to connect objects to the network through communication technology, thereby realizing an intelligent network that connects people and machines and things.

[0096] In a communication system, network devices can be devices that communicate with terminal devices. These network devices can also be called access network devices or wireless access network devices, such as base stations. Network devices can also refer to radio access network (RAN) nodes (or devices) that connect terminal devices to a wireless network. A base station can broadly encompass, or be replaced by, various names including: NodeB, evolved NodeB (eNB), next-generation NodeB (gNB), relay station, access point, transmitting and receiving point (TRP), transmitting point (TP), master eNodeB (MeNB), secondary eNodeB (SeNB), multi-standard radio (MSR) node, home base station, network controller, access node, wireless node, access point (AP), transmission node, transceiver node, baseband unit (BBU), remote radio unit (RRU), active antenna unit (AAU), remote radio head (RRH), central unit (CU), distributed unit (DU), positioning node, etc. A base station can be a macro base station, micro base station, relay node, donor node, or similar entities, or combinations thereof. A base station can also refer to a communication module, modem, or chip installed within the aforementioned equipment or apparatus. A base station can also be a mobile switching center, equipment performing base station functions in D2D, V2X, and M2M communications, network-side equipment in 6G networks, and equipment performing base station functions in future communication systems. A base station can support networks using the same or different access technologies. This application does not limit the specific technologies or equipment forms used in the network equipment.

[0097] Base stations can be fixed or mobile. For example, a helicopter or drone can be configured to act as a mobile base station, and one or more cells can move depending on the location of the mobile base station. In other examples, a helicopter or drone can be configured as a device to communicate with another base station.

[0098] Network equipment and terminal equipment can be deployed on land, including indoors or outdoors, handheld or vehicle-mounted; they can also be deployed on water; and they can also be deployed in the air on aircraft, balloons, and satellites. This application does not limit the scenario in which the network equipment and terminal equipment are located.

[0099] It should be understood that Figure 7 above is an illustrative example and this application is not limited thereto.

[0100] To facilitate understanding of the technical solution of this application, specific embodiments will be described below.

[0101] Referring to Figure 8, this figure is an interactive schematic diagram of a demodulation reference signal configuration method provided in an embodiment of this application, including:

[0102] S801: In response to the satisfaction of the adjustment conditions, the first base station determines the configuration information of the intelligent reflective surface device.

[0103] The RIS device is controlled by the second base station. The first and second base stations are adjacent frequency base stations. The operating frequency band of the second base station is adjacent to that of the first base station.

[0104] It should be noted that the number of RIS devices can be one or more. Taking the communication system shown in Figure 7 as an example, with one RIS device, the first base station is, for example, network device 112, the second base station is, for example, network device 111, and the RIS device is, for example, RIS device 130. The number of RIS devices can also be multiple. The number of second base stations can be the same as the number of RIS devices. Each second base station controls one corresponding RIS device. The number of second base stations can also be less than the number of RIS devices. One second base station can control multiple RIS devices.

[0105] The adjustment conditions are those that trigger the first base station to adjust the demodulation reference signal configuration scheme. The adjustment conditions can be determined based on the performance of the terminal equipment.

[0106] The adjustment condition is, for example, that the throughput of the terminal device is less than a throughput threshold. The first base station can obtain the throughput transmitted by the terminal device and determine the relationship between the throughput and the throughput threshold. If it is determined that the throughput is less than the throughput threshold, the adjustment condition is satisfied.

[0107] In other possible scenarios, the DMRS configuration scheme needs to be dynamically adjusted according to changes in the performance of the terminal device in order to achieve the best adjustment effect.

[0108] As another example, the adjustment condition is that after configuring the demodulation reference signal based on the demodulation reference signal configuration scheme, the throughput state of the terminal device lasts for a duration longer than a preset duration. The throughput state duration includes the duration during which the throughput is greater than a throughput threshold, or the duration during which the throughput is less than a throughput threshold. If the terminal device's throughput is consistently greater than the throughput threshold, it indicates that communication between the first base station and the terminal device may no longer be affected by the RIS device, or that the RIS device is no longer switching beams. In such cases, the demodulation reference signal configuration scheme needs to be readjusted to avoid wasting resources. If the terminal device's throughput is consistently less than the throughput threshold, it indicates that the DMRS configuration scheme for the RIS scenario has failed; for example, the terminal device has moved out of the RIS device's coverage area. The reduced throughput of the terminal device may be due to other reasons, requiring a readjustment of the DMRS configuration scheme. When the DMRS configuration scheme is readjusted, subsequent adjustment steps can be performed based on the current DMRS configuration scheme.

[0109] As another example, the adjustment condition is that after configuring the demodulation reference signal based on the demodulation reference signal configuration scheme, the throughput state of the terminal device lasts for a duration longer than a preset duration, and after adopting the initial DMRS configuration scheme, the throughput of the terminal device is less than the throughput threshold. Data transmission between the first base station and the terminal device is first performed using the initial DMRS configuration scheme. The initial DMRS configuration scheme is a pre-set DMRS configuration scheme. For example, referring to Figure 9, the initial DMRS configuration scheme configures DMRS pilots for symbols 2 and 11 in each time slot. The horizontal axis represents time slot S in the time domain. i The 14 symbols on the top axis represent a resource block (RB) occupied in the frequency domain. i is a positive integer less than or equal to m, representing the i-th slot out of m slots.

[0110] The configuration information of the RIS device includes information related to its operating status. This configuration information is used to determine the operating status of the RIS device. For example, the configuration information includes the first duration of the beam during beam scanning. For instance, taking Figure 1 above as an example where each CSI-RS beam lasts for 3 symbols, the first duration is the length of those 3 symbols. Thus, based on the first duration and the duration during which the terminal device's performance is affected, it can be determined whether the RIS device impacts the terminal device's performance. As another example, the configuration information includes a target frame number. The target frame number is used to instruct the RIS device to stop beam scanning within the target frame number. For example, the target frame number is X frames, where X is a positive integer. After receiving the target frame number, the second base station controls the RIS device to stop beam scanning within the next X frames. Based on the target frame number, the RIS device can be controlled to switch its operating status when it is in a fixed beam state. After the RIS device switches its operating status, it is determined whether the terminal device's performance changes, and thus whether the RIS device impacts the terminal device's performance.

[0111] S802: The first base station sends the configuration information of the intelligent reflective surface device to the terminal device.

[0112] S803: The terminal device obtains the configuration information of the intelligent reflective surface device sent by the first base station.

[0113] S804: The terminal device determines the performance parameters based on the configuration information of the intelligent reflective surface device.

[0114] The terminal device determines the corresponding performance parameters based on the configuration information of the RIS device. These performance parameters characterize the terminal device's performance, making it easier to determine whether the terminal device is affected by the RIS device.

[0115] As an example, taking the configuration information of the aforementioned RIS device, including the first duration of the beam during beam scanning, as an example, the terminal device determines the first time slot index of m time slots in the physical downlink shared channel whose decoding rate is lower than the decoding rate threshold. Then, from the symbols included in the m time slots, it determines n symbols whose adjacent phase difference is greater than the phase difference threshold. Here, m and n are positive integers. Symbols with adjacent phase differences greater than the phase difference threshold reflect channel changes. From the n symbols, the second duration of consecutive symbols is determined. It should be understood that the n symbols may include one or more sets of consecutive symbols; correspondingly, the number of second durations may be one or more.

[0116] As another example, taking the configuration information of the aforementioned RIS device, which includes a target frame number, as an example, the terminal device determines the throughput within the target frame. The target frame is the frame containing the target frame number after the terminal device receives the configuration information from the RIS device. Taking the target frame number as X frames as an example, the target frame is the X frames after the terminal device receives the target frame number. The terminal device determines the throughput within the X frames after receiving the configuration information from the RIS device.

[0117] S805: In response to determining that the performance parameters meet the demodulation reference signal configuration conditions, the terminal device determines the first index information.

[0118] The demodulation reference signal configuration conditions are used to trigger the determination of a new DMRS configuration scheme. Based on the DMRS configuration conditions and performance parameters, it can be determined whether the performance of the terminal device is affected by the RIS device.

[0119] As an example, when the performance parameter is a second duration, the DMRS configuration condition is that the second duration equals the first duration. When the second duration equals the first duration, it indicates that the beam scanning phase of the RIS device affects the channel changes of the terminal device, and the performance of the terminal device will be affected by the RIS device. If there are multiple second durations, the existence of one second duration equal to the first duration is sufficient to satisfy the DMRS configuration condition.

[0120] As another example, when the performance parameter is the throughput within the target frame, the DMRS configuration condition is that the throughput within the target frame is greater than or equal to a throughput threshold. If the throughput within the target frame is greater than or equal to the throughput threshold, it indicates that the throughput of the terminal device is improved when the RIS device is in a fixed beam state, thus proving that the RIS device switching beams affects the performance of the terminal device.

[0121] If it is determined that the RIS device affects the performance of the terminal device, the terminal device determines first index information. The first index information includes at least a first time slot index. The first time slot index is used to indicate the time slots for which DMRS configuration needs to be adjusted. In another possible implementation, the first index information includes a first time slot index and a first symbol index. The first symbol index is used to indicate the symbols for which DMRS configuration needs to be adjusted.

[0122] As an example, the first index information includes a first time slot index which is the first time slot index of m time slots included in the PDSCH where the decoding rate is lower than the decoding rate threshold. The first symbol index included in the first index information is the first symbol index of n symbols included in m time slots where the adjacent phase difference is greater than the phase difference threshold.

[0123] This application does not limit the method of determining the first index information. In one possible implementation, given a performance parameter of a second duration and m time slots and n symbols already determined, the first time slot index of the m time slots and the first symbol index of the n symbols are determined. In another possible implementation, the first time slot index of the m time slots included in the PDSCH with a decoding rate lower than a decoding rate threshold, and the first symbol index of the n symbols included in the m time slots with an adjacent phase difference greater than a phase difference threshold are determined.

[0124] S806: The terminal device sends the first adjustment information to the first base station.

[0125] The terminal device determines a suitable DMRS configuration scheme based on the first index information and generates first adjustment information. The first adjustment information instructs the first base station to execute a demodulation reference signal configuration scheme according to the first index information. The demodulation reference signal configuration scheme can be pre-stored in the terminal device and the first base station. The first adjustment information may include, for example, one or more of a first time slot index and a first symbol index, as well as an identifier. The identifier is used to indicate the DMRS configuration scheme.

[0126] Taking the first index information including a first time slot index of m time slots with a decoding rate lower than the decoding rate threshold, and a first symbol index of n symbols with an adjacent phase difference greater than the phase difference threshold included in the m time slots as an example, this application provides three possible implementation methods for determining the first adjustment information.

[0127] The first type: m is less than or equal to the number of time slots threshold, or n is greater than the number of symbols threshold and m is less than or equal to the number of time slots threshold.

[0128] The number of time slots threshold is a preset value. The number of time slots threshold affects the extent to which DMRS consumes data resources.

[0129] The symbol count threshold is a preset value. The symbol count threshold affects the amount of information that the terminal device sends to the first base station.

[0130] If m is determined to be less than or equal to the threshold for the number of time slots, it indicates that the data resources required for adjusting m time slots are relatively small. The terminal device determines to adopt DMRS configuration scheme 1. DMRS configuration scheme 1 maps demodulation reference signal pilots onto each symbol of m time slots.

[0131] Referring to Figure 10, this figure is a schematic diagram of a DMRS configuration scheme provided in an embodiment of this application.

[0132] For time slots other than the m time slots, the initial DMRS configuration scheme can be used.

[0133] In one possible implementation, after determining the first time slot index of m time slots, the terminal device sends indication information to the first base station. The indication information includes the optimal beam and the first time slot index of the m time slots. The indication information is used to instruct the first base station to transmit data with the optimal beam in time slots other than the m time slots.

[0134] As an example, the first adjustment information determined by the terminal system is called first information. The first information includes a first identifier. The first identifier is used to instruct the first base station to execute DMRS configuration scheme 1. That is, the first identifier is used to instruct the first base station to map demodulation reference signal pilots on each symbol included in the m time slots.

[0135] As another example, the first adjustment information determined by the terminal system is the third information. The third information includes a first time slot index and a third identifier for m time slots. The third identifier is used to instruct the first base station to execute DMRS configuration scheme 1, that is, to map demodulation reference signal pilots on each symbol included in the m time slots.

[0136] The second type: n is less than or equal to the threshold number of symbols.

[0137] If n is determined to be less than or equal to the symbol count threshold, it indicates that adjusting n symbols has a relatively small impact on the amount of information transmitted by the terminal device to the first base station. The terminal device then determines to use DMRS configuration scheme 2. DMRS configuration scheme 2 involves mapping demodulation reference signal pilots across n symbols in m time slots.

[0138] Referring to Figure 11, this figure is a schematic diagram of another DMRS configuration scheme provided in an embodiment of this application. The n symbols include symbol 4 and symbol 8.

[0139] For time slots other than the m time slots, the initial DMRS configuration scheme can be used.

[0140] In one possible implementation, after determining the first time slot index of m time slots, the terminal device sends indication information to the first base station. The indication information includes the optimal beam and the first time slot index of the m time slots. The indication information is used to instruct the first base station to transmit data with the optimal beam in time slots other than the m time slots.

[0141] As an example, the first adjustment information determined by the terminal system is the second information. The second information includes a first symbol index of n symbols and a second identifier. The second identifier is used to instruct the first base station to execute DMRS configuration scheme 2. That is, the second identifier is used to instruct the first base station to map demodulation reference signal pilots on n symbols in m time slots.

[0142] The third type: m is greater than the threshold for the number of time slots.

[0143] If m is determined to be greater than the threshold for the number of time slots, the terminal device determines to adopt DMRS configuration scheme 3. DMRS configuration scheme 3 involves mapping demodulation reference signal pilots on the first symbol of m time slots and mapping demodulation reference signal pilots on n symbols.

[0144] Referring to Figure 12, this figure is a schematic diagram of another DMRS configuration scheme provided in an embodiment of this application. The first symbol is symbol 0, and the n symbols include symbols 4 and 8.

[0145] As an example, the first adjustment information determined by the terminal system is the fourth information. The fourth information includes the first time slot index of m time slots, the first symbol index of n symbols, and the fourth identifier. The fourth identifier is used to instruct the first base station to execute DMRS configuration scheme 3. That is, the fourth identifier is used to instruct the first base station to map demodulation reference signal pilots in m time slots, including the first symbol of each time slot and n symbols.

[0146] Furthermore, if it is determined that n is greater than the symbol count threshold and m is greater than the time slot count threshold, the terminal device adjusts the decoding rate threshold until a suitable DMRS configuration scheme is determined based on n and m. For example, the terminal device lowers the decoding rate threshold until it is determined that n is less than or equal to the symbol count threshold, and / or, it is determined that m is less than or equal to the time slot count threshold.

[0147] S807: The first base station obtains the first adjustment information sent by the terminal device.

[0148] S808: The first base station configures the demodulation reference signal according to the demodulation reference signal configuration scheme indicated by the first adjustment information based on the first adjustment information.

[0149] Thus, the first base station can send the configuration information of the RIS device to the terminal when the adjustment conditions are met. The terminal device determines performance information based on the RIS device's configuration information. The terminal device then determines whether it is affected by the RIS device based on the performance information. If the terminal device determines that the performance is affected by the RIS device, it determines and instructs the first base station to execute a suitable DMRS configuration scheme. The terminal device can accurately determine the time-domain location of channel mutations based on the first index information, such as the aforementioned m time slots and n symbols, and thus determine a suitable DMRS configuration scheme to effectively address the randomness of adjacent-channel interference caused by the RIS device.

[0150] Furthermore, the DMRS configuration scheme is executed for time-frequency locations affected by RIS equipment interference, while the initial DMRS configuration scheme can still be used for unaffected time-frequency locations, reducing the scope of DMRS configuration adjustments. The terminal device can perform channel estimation and coherent demodulation based on the DMRS configuration scheme. Specifically, taking the above example of adjusting the DMRS configuration scheme for m time slots, the terminal device performs channel estimation and demodulation within the m time slots using the DMRS configuration scheme based on the first adjustment information indication.

[0151] Furthermore, in one possible implementation, after executing the instructed DMRS configuration scheme based on the first adjustment information, the adjusted DMRS configuration scheme may fail due to changes in the operating status of the RIS device or terminal device. Referring to Figure 13, which is an interactive schematic diagram of another demodulation reference signal configuration method provided in this application embodiment, in addition to the above-described S801-S808, it also includes S809-S812:

[0152] S809: The terminal device determines that the index adjustment conditions are met and determines the second index information.

[0153] Index adjustment conditions are the conditions that trigger a terminal device to re-determine index information. Index adjustment conditions can be determined based on the performance of the terminal device.

[0154] Indexing adjustment conditions include, for example, a terminal device's throughput being less than or equal to a throughput threshold. If the terminal device's throughput is determined to be less than or equal to the throughput threshold, then the indexing adjustment condition is deemed met.

[0155] The terminal device re-determines the index information to obtain second index information. The second index information includes at least a second timeslot index. The second timeslot index is used to indicate the timeslots for which DMRS configuration needs adjustment. In another possible implementation, the second index information includes a second timeslot index and a second symbol index. The second symbol index is used to indicate the symbols for which DMRS configuration needs adjustment.

[0156] The method for determining the second index information is similar to that for determining the first index information, and will not be repeated here.

[0157] S810: The terminal device sends the second adjustment information to the first base station.

[0158] The terminal device determines a suitable DMRS configuration scheme based on the second index information and generates second adjustment information. The second adjustment information is used to instruct the first base station to execute the DMRS configuration scheme according to the second index information. The implementation method of determining the second adjustment information based on the second index information is similar to the implementation method of determining the first adjustment information based on the first index information described above; please refer to the description above for details.

[0159] S811: The first base station obtains the second adjustment information sent by the terminal device.

[0160] S812: The first base station configures the demodulation reference signal according to the demodulation reference signal configuration scheme indicated by the second adjustment information, based on the second adjustment information.

[0161] The terminal device can dynamically adjust the DMRS configuration scheme based on performance changes, reduce the interference of the RIS device to adjacent channel devices, and improve the data transmission performance between the first base station and the terminal device.

[0162] Furthermore, regarding the different numbers of RIS devices, two possible implementation methods can be distinguished: a single RIS device scenario and a multiple RIS device scenario. The number of RIS devices can be determined based on the interaction between the first base station and other base stations. The following describes the configuration method of the demodulation reference signal provided in the embodiments of this application, using these two possible implementation scenarios as examples.

[0163] The first type: for a single RIS device scenario.

[0164] Referring to Figure 14, which is a flowchart illustrating a method for configuring a demodulation reference signal according to an embodiment of this application.

[0165] The initial DMRS configuration scheme is used between the first base station and the terminal equipment. For example, the initial DMRS configuration scheme configures DMRS pilots in the 2nd and 11th symbols of each time slot.

[0166] Referring to Figure 15, this figure is an interaction flowchart of a first base station, a second base station, and a terminal device provided in an embodiment of this application.

[0167] The first base station and the terminal device perform beam scanning and data transmission. The terminal device reports its throughput to the first base station. The adjustment condition is that the terminal device's throughput is less than a throughput threshold. If the first base station determines that the terminal device's throughput is less than the throughput threshold, it triggers the terminal device to determine whether the performance is affected by the RIS device. The first base station sends a first request message to other base stations. The first request message is used by the second base station, which controls the RIS device, to feed back the configuration information of the RIS device. The second base station receives the first request message and feeds back information 15-1 to the first base station. Information 15-1 includes the identification information of the paired RIS device of the second base station and the configuration information of the RIS device controlled by the second base station. The configuration information of the RIS device includes the first duration of the beam during beam scanning. The first base station obtains the first duration.

[0168] In addition, the terminal equipment selects the optimal beam from the beam scan transmitted by the first base station based on the principle of maximizing received power, and detects the slot indices of the m slots with decoding rates lower than the decoding rate threshold out of the M slots in the PDSCH. The m slot indices are represented as s1, s2, s3, ..., s m The terminal device sends information 15-2 to the first base station. Information 15-2 is indication information. Information 15-2 includes the beam index of the optimal beam and the time slot indexes of the m time slots.

[0169] The first base station sends information 15-1 to the terminal device, which is the configuration information of the RIS device. Based on the acquired information 15-2, the first base station configures the DMRS pilots for m time slots out of the M time slots included in the PDSCH using the initial DMRS configuration scheme, and transmits data using the optimal beam for the remaining time slots. M is a positive integer. M is greater than or equal to m.

[0170] The performance parameter is the second duration. The terminal device performs channel estimation on the CSI-RS to determine the phase difference of the CSI-RS channel between adjacent symbols in m time slots. The terminal device identifies n symbols whose phase difference is greater than the phase difference threshold. The symbol indices of the n symbols are represented as l1, l2, l3, ..., l n n is less than the product of m and 14. 14 is the number of symbols included in a time slot. The terminal device determines the duration of n symbols to obtain the second duration. In another possible implementation, if no symbol with a phase difference greater than the phase difference threshold is detected, the second duration is 0.

[0171] Correspondingly, the demodulation reference signal configuration condition is that the second duration equals the first duration. If the terminal device determines that the second duration equals the first duration, it indicates that the terminal device's performance is affected by the RIS device. If the terminal device determines that the second duration does not equal the first duration, it indicates that the terminal device's performance is not affected by the RIS device, and the terminal device exits this DRMS ​​configuration adjustment.

[0172] Once the performance parameters are determined to meet the demodulation reference signal configuration conditions, the terminal device determines the index information, obtaining the first index information. The first index information includes the first time slot index of m time slots and the first symbol index of n symbols. Based on the first index information, the terminal device determines the DMRS configuration scheme.

[0173] For example, when n is greater than the symbol count threshold and m is less than or equal to the time slot count threshold, DMRS configuration scheme 1 is adopted. When n is less than or equal to the symbol count threshold, DMRS configuration scheme 2 is adopted. Alternatively, when n is greater than the symbol count threshold and m is greater than the time slot count threshold, the terminal device adjusts the decoding rate threshold, redetermines m time slots and n symbols, until m is less than or equal to the time slot count threshold, in which case DMRS configuration scheme 1 is determined; or, if n is less than or equal to the symbol count threshold, DMRS configuration scheme 2 is determined.

[0174] Given DMRS configuration scheme 1, the first base station needs to implement DMRS encryption at the time slot granularity. The terminal device sends first information to the first base station. The first information includes a first identifier. The first identifier is used to instruct the first base station to map demodulation reference signal pilots on each symbol included in the m time slots.

[0175] The first base station receives the first information. Based on the first information, and according to the m time slots indicated by the indication information, the first base station maps DMRS pilots onto all symbols within the m time slots. The first base station uses the initial DMRS configuration scheme for time slots outside the m time slots. The terminal device performs channel estimation based on the DMRS pilots.

[0176] Given DMRS configuration scheme 2, the first base station needs to implement symbol-level DMRS encryption. The terminal device sends second information to the first base station. The second information includes a first symbol index of n symbols and a second identifier. The second identifier is used to instruct the first base station to map demodulation reference signal pilots on n symbols across m time slots.

[0177] The first base station receives the second information. Based on the second information, and according to the m time slots indicated by the indication information, the first base station maps DMRS pilots onto n symbols within those m time slots. The first base station uses the initial DMRS configuration scheme for time slots outside the m time slots. The terminal device performs channel estimation based on the DMRS pilots.

[0178] The terminal device processes symbol l within m time slots. k Channel estimation is performed on the DMRS pilot and time-domain extrapolation is performed to the symbol [l] k ,l k+1 ), symbol l n The channel estimate is extrapolated to the last symbol of m time slots. k takes the value [1, n].

[0179] After adjusting the DMRS configuration scheme, the terminal device monitors the throughput in real time. If the throughput is greater than the throughput threshold, the current DMRS configuration scheme is valid. If the throughput is less than or equal to the throughput threshold, the index adjustment condition is met. The terminal device re-determines the index information to obtain second index information. Based on the second index information, the terminal device sends second adjustment information to the first base station to adjust the DMRS configuration scheme. If the throughput remains less than or equal to the throughput threshold, the current DMRS configuration scheme has become invalid. The terminal device sends an instruction to the first base station to adjust to the initial DMRS configuration scheme. After executing the initial DMRS configuration scheme, the first base station re-determines whether the adjustment condition is met. If the throughput remains greater than the throughput threshold, continuing to execute the current DMRS configuration scheme may result in resource waste. The terminal device sends an instruction to the first base station to adjust to the initial DMRS configuration scheme. After executing the initial DMRS configuration scheme, the first base station re-determines whether the adjustment condition is met.

[0180] This allows for the determination of whether a RIS device interferes with a terminal device based on the RIS device's configuration information and the terminal device's performance parameters. The terminal device, by determining the first index information, can effectively detect the interference caused by the deployment of a single RIS device to adjacent-channel terminal devices. Based on the first index information, a suitable DMRS configuration scheme is determined, enabling adaptive and dynamic adjustment of the DMRS configuration scheme to improve data transmission performance between adjacent-channel base stations and adjacent-channel terminal devices.

[0181] The second type: for scenarios involving multiple RIS devices.

[0182] Referring to Figure 16, which is a flowchart illustrating another method for configuring a demodulation reference signal according to an embodiment of this application.

[0183] The initial DMRS configuration scheme is used between the first base station and the terminal equipment. For example, the initial DMRS configuration scheme configures DMRS pilots in the 2nd and 11th symbols of each time slot.

[0184] Referring to Figure 17, this figure is an interaction flowchart of a first base station, a second base station, and a terminal device provided in an embodiment of this application.

[0185] The first base station and the terminal device perform beam scanning and data transmission. The terminal device reports its throughput to the first base station. The adjustment condition is that the terminal device's throughput is less than a throughput threshold. If the first base station determines that the terminal device's throughput is less than the throughput threshold, it triggers the terminal device to determine whether the performance is affected by the RIS device. The first base station sends a second request message to other base stations. The second request message is used to control the second base station of the RIS device to feed back the configuration information of the RIS device. The second base station obtains the second request message and feeds back message 17-1 to the first base station. Message 17-1 includes the identification information of the RIS device that the second base station has paired with. The first base station sends message 17-2 to the second base station. Message 17-2 is a first indication message, which includes the configuration information of the RIS device. The first indication message is used to instruct the second base station to record the fixed beam index used in the current frame data transmission phase and control the RIS device to stop beam scanning in the subsequent target frame number and transmit data using the target beam according to the fixed beam index. Based on the first indication message, the second base station controls the RIS device to be in a fixed beam state in the target frame number and transmit data according to the target beam used in the current frame data transmission phase. This ensures that the RIS device remains in a fixed beam state within the target frame number, making it easier for the terminal device to detect whether its performance has changed and thus determine whether the RIS device affects the performance of the terminal device.

[0186] While sending information 17-2 to the second base station, the first base station also sends information 17-3 to the terminal device. Information 17-3 includes the target frame number. Information 17-3 instructs the terminal device to initiate throughput detection based on the target frame number. After acquiring the target frame number, the terminal device determines the target frame corresponding to the target frame number and then determines the throughput within the target frame. The throughput within the target frame is a performance parameter.

[0187] The DMRS configuration condition is that the throughput within the target frame is greater than or equal to the throughput threshold. If the throughput within the target frame is greater than or equal to the throughput threshold, it indicates that the terminal device's throughput is improved when the RIS device is in a fixed beam state, thus proving that the RIS device's beam switching affects the terminal device's performance. If the throughput within the target frame is less than the throughput threshold, it indicates that the RIS device's switching state does not affect the terminal device's throughput, and the RIS device does not affect the terminal device's performance. The terminal device exits this DMRS configuration scheme adjustment.

[0188] Assuming the performance parameters meet the demodulation reference signal configuration conditions, the terminal device determines that the PDSCH includes m time slots with a decoding rate lower than the decoding rate threshold, and n symbols within those m time slots whose adjacent phase difference is greater than the phase difference threshold. The terminal device then determines first index information. This first index information includes a first time slot index for the m time slots and a first symbol index for the n symbols.

[0189] The terminal device determines the DMRS configuration scheme based on the first index information.

[0190] For example, when m is less than or equal to the number of time slots threshold, DMRS configuration scheme 1 is adopted. When m is greater than the number of time slots threshold, DMRS configuration scheme 3 is adopted.

[0191] Given DMRS configuration scheme 1, the first base station needs to implement DMRS encryption at the time slot granularity. The terminal device sends third information to the first base station. The third information includes the first time slot index of m time slots and a third identifier. The third identifier is used to instruct the first base station to map demodulation reference signal pilots on each symbol included in the m time slots.

[0192] The first base station receives the third information. Based on the third information, and using the time slot index (including m time slots) within the third information, the first base station maps DMRS pilots onto all symbols within the m time slots. The first base station uses the initial DMRS configuration scheme for time slots outside the m time slots. The terminal device performs channel estimation based on the DMRS pilots.

[0193] Given DMRS configuration scheme 3, the first base station must implement symbol-level DMRS encryption. The terminal device sends fourth information to the first base station. The fourth information includes the first time slot index of m time slots, the first symbol index of n symbols, and a fourth identifier. The fourth identifier is used to instruct the first base station to map demodulation reference signal pilots on the first and n symbols of the m time slots.

[0194] The first base station receives the fourth information. Based on the fourth information and the m time slots indicated by the indication information, the first base station maps DMRS pilots on the first and nth symbols within the m time slots. The first base station uses the initial DMRS configuration scheme for time slots outside the m time slots. The terminal equipment performs channel estimation based on the DMRS pilots.

[0195] The terminal equipment performs channel estimation on the DMRS pilot on the first symbol within m time slots and extrapolates it in the time domain to the symbols before the first phase-jump symbol l1, and performs channel estimation on symbol l1. k Channel estimation is performed on the DMRS pilot and time-domain extrapolation is performed to the symbol [l] k ,l k+1 ), symbol l nThe channel estimate is extrapolated to the last symbol of m time slots. k takes the value [1, n].

[0196] After adjusting the DMRS configuration scheme, the terminal device monitors the throughput in real time. If the throughput is greater than the throughput threshold, the current DMRS configuration scheme is valid. If the throughput is less than or equal to the throughput threshold, the index adjustment condition is met. The terminal device re-determines the index information to obtain second index information. Based on the second index information, the terminal device sends second adjustment information to the first base station to adjust the DMRS configuration scheme. If the throughput remains less than or equal to the throughput threshold, the current DMRS configuration scheme has become invalid. The terminal device sends an instruction to the first base station to adjust to the initial DMRS configuration scheme. After executing the initial DMRS configuration scheme, the first base station re-determines whether the adjustment condition is met. If the throughput remains greater than the throughput threshold, continuing to execute the current DMRS configuration scheme may result in resource waste. The terminal device sends an instruction to the first base station to adjust to the initial DMRS configuration scheme. After executing the initial DMRS configuration scheme, the first base station re-determines whether the adjustment condition is met.

[0197] In scenarios with multiple RIS devices, the beam switching times of different RIS devices vary, leading to more complex channel impacts on adjacent-channel terminal devices. The DMRS configuration method for multiple RIS devices effectively detects interference caused by RIS devices to adjacent-channel users by controlling their operating states. Based on the first index information, a suitable DMRS configuration scheme is determined and automatically adjusted to address the performance degradation of adjacent-channel terminal devices caused by RIS device deployment.

[0198] It should be noted that the above two scenario divisions are merely examples and do not limit the application scenarios of the demodulation reference signal configuration method. For instance, the above method for configuring the demodulation reference signal for multiple RIS devices can also be applied to a single RIS device scenario.

[0199] Referring to Figure 18, this application embodiment provides a communication device 1800, which includes a transceiver unit 1801 and a processing unit 1802. The transceiver unit 1801 includes a receiving unit for receiving data and a transmitting unit for sending data.

[0200] The communication device 1800 can realize the functions of the terminal device or base station in the above method embodiments, and therefore can also achieve the beneficial effects of the above method embodiments. In the embodiments of this application, the communication device 1800 can be a terminal device or base station, or it can be an integrated circuit or component inside the terminal device or base station, such as a chip.

[0201] In some embodiments, the apparatus 1800 is used to execute the configuration method for the demodulation reference signal applied to the terminal device in the foregoing embodiments. In this case:

[0202] A receiving unit is used to acquire configuration information of a smart reflective surface device sent by a first base station, wherein the smart reflective surface device is controlled by a second base station, and the frequency band of the second base station is adjacent to the frequency band of the first base station.

[0203] Processing unit 1802 is used to determine performance parameters based on the configuration information of the intelligent reflective surface device;

[0204] The processing unit 1802 is further configured to respond to determining that the performance parameters meet the demodulation reference signal configuration conditions, wherein the determination of the first index information includes at least a first time slot index;

[0205] The transmitting unit is configured to transmit first adjustment information to the first base station. The first adjustment information is determined based on the first index information and is used to instruct the first base station to execute a demodulation reference signal configuration scheme according to the first index information.

[0206] In one possible implementation, the processing unit 1802 is configured to determine performance parameters based on the configuration information of the intelligent reflective surface device, including:

[0207] The processing unit 1802 is configured to determine the first time slot index of m time slots in the physical downlink shared channel whose decoding rate is lower than the decoding rate threshold, where m is a positive integer; determine n symbols in the m time slots whose adjacent phase difference is greater than the phase difference threshold, where n is a positive integer; and determine the second duration of consecutive symbols in the n symbols, where the performance parameter is the second duration.

[0208] The configuration information of the intelligent reflective surface device includes the first duration of the beam during beam scanning, and the demodulation reference signal configuration condition is that the second duration is equal to the first duration.

[0209] In one possible implementation, the first index information includes the first time slot index of the m time slots and the first symbol index of the n symbols.

[0210] In one possible implementation, the sending unit is further configured to:

[0211] The first base station is sent an indication message, which includes an optimal beam and a first time slot index of the m time slots. The indication message is used to instruct the first base station to transmit data with the optimal beam in time slots other than the m time slots.

[0212] In one possible implementation, the sending unit is configured to send first adjustment information to the first base station, including:

[0213] The transmitting unit is configured to transmit first information to the first base station in response to determining that n is greater than the symbol number threshold and m is less than or equal to the time slot number threshold. The first information includes a first identifier, which is used to instruct the first base station to map demodulation reference signal pilots on each symbol included in the m time slots.

[0214] In response to determining that n is less than or equal to a symbol count threshold, a second message is sent to the first base station. The second message includes a first symbol index and a second identifier for the n symbols. The first identifier is used to indicate that the first base station maps demodulation reference signal pilots on the n symbols in the m time slots.

[0215] In one possible implementation, the processing unit 1802 is further configured to adjust the decoding rate threshold in response to determining that n is greater than the symbol count threshold and m is greater than the time slot count threshold, until it is determined that n is less than or equal to the symbol count threshold, and / or that m is less than or equal to the time slot count threshold.

[0216] In one possible implementation, the configuration information of the intelligent reflective surface device includes a target number of frames, and the processing unit 1802 is configured to determine performance parameters based on the configuration information of the intelligent reflective surface device, including:

[0217] The processing unit 1802 is used to determine the throughput within a target frame, wherein the target frame is the frame of the target frame number after the terminal device receives the configuration information of the intelligent reflective surface device.

[0218] In one possible implementation, the demodulation reference signal is configured such that the throughput is greater than or equal to a throughput threshold.

[0219] In one possible implementation, the processing unit 1802 is configured to determine the first index information, including:

[0220] The processing unit 1802 is configured to determine the first time slot index of m time slots in the physical downlink shared channel whose decoding rate is lower than the decoding rate threshold; and to determine the first symbol index of n symbols in the m time slots whose adjacent phase difference is greater than the phase difference threshold, wherein the first index information includes the first time slot index of the m time slots and the first symbol index of the n symbols.

[0221] In one possible implementation, the sending unit is configured to send first adjustment information to the first base station, including:

[0222] The transmitting unit is configured to, in response to determining that m is less than or equal to a time slot number threshold, transmit third information to the first base station, the third information including a first time slot index and a third identifier of the m time slots, the third identifier being used to instruct the first base station to map demodulation reference signal pilots on each symbol included in the m time slots; and in response to determining that m is greater than the time slot number threshold, transmit fourth information to the first base station, the fourth information including a first time slot index of the m time slots, a first symbol index of the n symbols, and a fourth identifier, the fourth identifier being used to instruct the first base station to map demodulation reference signal pilots on the first symbol of each time slot and the n symbols in the m time slots.

[0223] In one possible implementation, the processing unit 1802 is further configured to determine that the index adjustment conditions are met and to determine the second index information;

[0224] The transmitting unit is further configured to send second adjustment information to the first base station, the second adjustment information being determined based on the second index information, and the second adjustment information being used to instruct the first base station to execute a demodulation reference signal configuration scheme according to the second index information.

[0225] In other embodiments, the device 1800 is configured to perform the demodulation reference signal configuration method applied to the first base station in the foregoing embodiments, in which case:

[0226] A processing unit is configured to determine configuration information of an intelligent reflective surface device in response to the satisfaction of adjustment conditions, wherein the intelligent reflective surface device is controlled by a second base station, and the frequency band of the second base station is adjacent to that of the first base station.

[0227] The sending unit is used to send the configuration information of the intelligent reflective surface device to the terminal device;

[0228] The receiving unit is configured to acquire first adjustment information sent by the terminal device, the first adjustment information being determined based on first index information, the first index information including at least a first time slot index, and the first adjustment information indicating the execution of a demodulation reference signal configuration scheme according to the first index information.

[0229] The processing unit is further configured to configure the demodulation reference signal according to the first adjustment information and the demodulation reference signal configuration scheme.

[0230] In one possible implementation, the processing unit is configured to determine configuration information of the intelligent reflective surface device, including:

[0231] The processing unit is used to send a first request information to other base stations, the first request information being used to instruct the base station controlling the intelligent reflective surface device to provide feedback on the configuration information of the intelligent reflective surface device;

[0232] The processing unit is used to obtain the configuration information of the intelligent reflective surface device sent by the second base station. The configuration information of the intelligent reflective surface device includes the first duration of the beam of the intelligent reflective surface device during beam scanning.

[0233] In one possible implementation, the processing unit is configured to determine configuration information of the intelligent reflective surface device, including:

[0234] The processing unit is used to obtain the target number of frames, and the configuration information of the RIS device includes the target number of frames.

[0235] In one possible implementation, the transmitting unit is further configured to send first indication information to the second base station, the first indication information being configured to instruct the second base station to control the intelligent reflective surface device to stop beam scanning within the subsequent target frame number and transmit data with the target beam, the target beam being the beam used by the second base station in the current frame data transmission phase.

[0236] In one possible implementation, the receiving unit is further configured to acquire second indication information sent by the terminal device, the second indication information including an optimal beam and a first time slot index of m time slots, wherein the m time slots are m time slots included in the physical downlink shared channel with a decoding rate lower than the decoding rate threshold;

[0237] The processing unit is also configured to transmit data in the optimal beam in time slots other than the m time slots.

[0238] In one possible implementation, the first adjustment information is first information, which includes a first symbol index and a first identifier for n symbols. The n symbols are n symbols in m time slots whose adjacent phase difference is greater than a phase difference threshold. The m time slots are m time slots in the physical downlink shared channel whose decoding rate is lower than a decoding rate threshold. The first identifier is used to indicate the mapping of demodulation reference signal pilots on the n symbols in the m time slots.

[0239] The processing unit is configured to configure the demodulation reference signal according to the first adjustment information and the demodulation reference signal configuration scheme, including:

[0240] Demodulation reference signal pilots are mapped onto the n symbols in the m time slots;

[0241] or,

[0242] The first adjustment information is the second information, which includes a second identifier. The second identifier is used to indicate the mapping of demodulation reference signal pilots on each symbol included in the m time slots.

[0243] The processing unit is configured to configure the demodulation reference signal according to the first adjustment information and the demodulation reference signal configuration scheme, including:

[0244] Demodulation reference signal pilots are mapped onto each symbol included in the m time slots.

[0245] In one possible implementation, the first adjustment information is third information, which includes a first time slot index and a third identifier for m time slots, wherein the m time slots are m time slots included in the physical downlink shared channel with a decoding rate lower than the decoding rate threshold, and the third identifier is used to indicate the mapping of demodulation reference signal pilots on each symbol included in the m time slots.

[0246] The processing unit is configured to configure the demodulation reference signal according to the first adjustment information and the demodulation reference signal configuration scheme, including:

[0247] The processing unit is used to map demodulation reference signal pilots onto each symbol included in the m time slots;

[0248] Alternatively, the first adjustment information is a fourth piece of information, which includes a first time slot index of m time slots, a first symbol index of n symbols, and a fourth identifier. The m time slots are the m time slots included in the physical downlink shared channel with a decoding rate lower than the decoding rate threshold. The n symbols are the n symbols included in the m time slots with an adjacent phase difference greater than the phase difference threshold. The fourth identifier is used to indicate the first symbol included in the m time slots and the demodulation reference signal pilot of the n symbols.

[0249] The processing unit is configured to configure the demodulation reference signal according to the first adjustment information and the demodulation reference signal configuration scheme, including:

[0250] The processing unit is used to map and demodulate the reference signal pilot for the first symbol and the n symbols included in the m time slots.

[0251] In one possible implementation, the adjustment conditions include any one of the following:

[0252] The throughput of the terminal device is less than the throughput threshold.

[0253] After configuring the demodulation reference signal according to the demodulation reference signal configuration scheme indicated by the first adjustment information, the duration during which the throughput of the terminal device is greater than the throughput threshold is greater than the preset duration.

[0254] After configuring the demodulation reference signal according to the demodulation reference signal configuration scheme indicated by the first adjustment information, the duration during which the throughput of the terminal device is less than the throughput threshold is greater than the preset duration.

[0255] In one possible implementation, the receiving unit is further configured to acquire second adjustment information sent by the terminal device, the second adjustment information being determined based on second index information, the second index information including at least a second time slot index, and the second adjustment information indicating the execution of a demodulation reference signal configuration scheme according to the second index information;

[0256] The processing unit is further configured to configure the demodulation reference signal according to the demodulation reference signal configuration scheme based on the second adjustment information.

[0257] It should be noted that the information execution process of each unit in the above-mentioned communication device 1800 can be specifically described in the method embodiments shown above in this application, and will not be repeated here.

[0258] Please refer to Figure 19, which is a schematic diagram of another communication device provided in this application. The communication device 1900 includes a logic circuit 1901 and an input / output interface 1902. The communication device 1900 can be a chip or an integrated circuit.

[0259] The communication device 1900 can realize the functions of the terminal device or the first base station in the above method embodiments, and therefore can also achieve the beneficial effects of the above method embodiments. In the embodiments of this application, the communication device 1900 can be a terminal device or a first base station, or it can be an integrated circuit or component inside the terminal device or the first base station, such as a chip.

[0260] In Figure 18, the transceiver unit 1801 can be a communication interface, which can be the input / output interface 1902 in Figure 19. The input / output interface 1902 can include an input interface and an output interface. Alternatively, the communication interface can also be a transceiver circuit, which can include an input interface circuit and an output interface circuit.

[0261] In one possible implementation, when the device 1900 is configured to execute the demodulation reference signal configuration method in the foregoing embodiments, the logic circuit 1901 is configured to determine performance parameters based on the configuration information of the intelligent reflective surface device; in response to determining that the performance parameters satisfy the demodulation reference signal configuration conditions, the first index information is determined, the first index information including at least a first time slot index; the input / output interface 1902 is configured to acquire the configuration information of the intelligent reflective surface device sent by the first base station, the intelligent reflective surface device being controlled by the second base station, the frequency band of the second base station being adjacent to the frequency band of the first base station; and to send first adjustment information to the first base station, the first adjustment information being determined based on the first index information, the first adjustment information being used to instruct the first base station to execute the demodulation reference signal configuration scheme according to the first index information.

[0262] The logic circuit 1901 and the input / output interface 1902 can also perform other steps in the aforementioned embodiments and achieve corresponding beneficial effects, which will not be elaborated here.

[0263] In one possible implementation, when the device 1900 is configured to execute another demodulation reference signal configuration method in the foregoing embodiments, the logic circuit 1901 is configured to determine configuration information of a smart reflective surface device controlled by a second base station, the frequency band of the second base station being adjacent to the frequency band of the first base station, in response to the satisfaction of adjustment conditions; configure a demodulation reference signal according to the demodulation reference signal configuration scheme based on the first adjustment information; the input / output interface 1902 is configured to send the configuration information of the smart reflective surface device to a terminal device; and obtain first adjustment information sent by the terminal device, the first adjustment information being determined based on first index information, the first index information including at least a first time slot index, the first adjustment information indicating the execution of a demodulation reference signal configuration scheme based on the first index information;

[0264] The logic circuit 1901 and the input / output interface 1902 can also perform other steps in the aforementioned embodiments and achieve corresponding beneficial effects, which will not be elaborated here.

[0265] In one possible implementation, the processing unit 1802 shown in FIG18 can be the logic circuit 1901 in FIG19.

[0266] Optionally, the logic circuit 1901 can be a processing device, the functions of which can be partially or entirely implemented in software.

[0267] Optionally, the processing apparatus may include a memory and a processor, wherein the memory is used to store a computer program, and the processor reads and executes the computer program stored in the memory to perform the corresponding processing and / or steps in any of the method embodiments.

[0268] Optionally, the processing device may consist of only a processor. A memory for storing computer programs is located outside the processing device, and the processor is connected to the memory via circuitry / wires to read and execute the computer programs stored in the memory. The memory and processor may be integrated together or physically independent of each other.

[0269] Optionally, the processing device may be one or more chips, or one or more integrated circuits. For example, the processing device may be one or more field-programmable gate arrays (FPGAs), application-specific integrated circuits (ASICs), system-on-chips (SoCs), central processing units (CPUs), network processors (NPs), digital signal processors (DSPs), microcontroller units (MCUs), programmable logic devices (PLDs), or other integrated chips, or any combination of the above chips or processors.

[0270] Please refer to Figure 20, which shows the communication device 2000 involved in the above embodiments provided in the embodiments of this application. The communication device 2000 may include, but is not limited to, at least one processor 2001 and a communication port 2002.

[0271] Further optionally, the device may also include at least one of a memory 2003 and a bus 2004. In embodiments of this application, the at least one processor 2001 is used to control the operation of the communication device 2000.

[0272] Furthermore, the processor 2001 can be a central processing unit, a general-purpose processor, a digital signal processor, an application-specific integrated circuit, a field-programmable gate array, or other programmable logic devices, transistor logic devices, hardware components, or any combination thereof. It can implement or execute the various exemplary logic blocks, modules, and circuits described in conjunction with the disclosure of this application. The processor can also be a combination that implements computing functions, such as a combination of one or more microprocessors, a combination of a digital signal processor and a microprocessor, etc. Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the systems, devices, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0273] The communication device 2000 can implement the functions of the terminal device or the first base station in the above method embodiments. In the embodiments of this application, the communication device 2000 can be a terminal device or a first base station, or it can be an integrated circuit or component, such as a chip, inside the terminal device or the first base station. The specific implementation of the communication device shown in FIG20 can be referred to the description in the foregoing method embodiments, and will not be repeated here.

[0274] Please refer to Figure 21, which is a schematic diagram of the structure of the communication device 2100 involved in the above embodiments provided in the embodiments of this application.

[0275] The communication device 2100 can realize the functions of the terminal device or the first base station in the above method embodiments, and therefore can also achieve the beneficial effects of the above method embodiments. In the embodiments of this application, the communication device 2100 can be a terminal device or a first base station, or it can be an integrated circuit or component, such as a chip, inside the terminal device or the first base station.

[0276] The communication device 2100 includes at least one processor 2111 and at least one network interface 2114. Further optionally, the communication device also includes at least one memory 2112, at least one transceiver 2113, and one or more antennas 2115. The processor 2111, memory 2112, transceiver 2113, and network interface 2114 are connected, for example, via a bus. In this embodiment, the connection may include various interfaces, transmission lines, or buses, etc., and this embodiment is not limited thereto. The antenna 2115 is connected to the transceiver 2113. The network interface 2114 enables the communication device to communicate with other communication devices through a communication link. For example, the network interface 2114 may include a network interface between the communication device and core network equipment, such as an S1 interface; the network interface may also include a network interface between the communication device and other communication devices (e.g., other network devices or core network equipment), such as an X2 or Xn interface.

[0277] The processor 2111 is mainly used to process communication protocols and communication data, control the entire communication device, execute software programs, and process data from the software programs, for example, to support the actions described in the embodiments of the communication device. The communication device may include a baseband processor and a central processing unit (CPU). The baseband processor is mainly used to process communication protocols and communication data, while the CPU is mainly used to control the entire terminal device, execute software programs, and process data from the software programs. The processor 2111 in Figure 21 can integrate the functions of both a baseband processor and a CPU. Those skilled in the art will understand that the baseband processor and CPU can also be independent processors interconnected via technologies such as buses. Those skilled in the art will understand that a terminal device may include multiple baseband processors to adapt to different network standards, and multiple CPUs to enhance its processing capabilities. Various components of the terminal device can be connected via various buses. The baseband processor can also be described as a baseband processing circuit or a baseband processing chip. The CPU can also be described as a central processing circuit or a central processing chip. The function of processing communication protocols and communication data can be built into the processor or stored in memory as a software program, which is then executed by the processor to implement the baseband processing function.

[0278] The memory is primarily used to store software programs and data. The memory 2112 can exist independently or be connected to the processor 2111. Optionally, the memory 2112 can be integrated with the processor 2111, for example, integrated within a single chip. The memory 2112 can store program code that executes the technical solutions of the embodiments of this application, and its execution is controlled by the processor 2111. The various types of computer program code being executed can also be considered as drivers for the processor 2111.

[0279] Figure 21 shows only one memory and one processor. In actual terminal devices, there may be multiple processors and multiple memories. Memory can also be called storage medium or storage device, etc. Memory can be a storage element on the same chip as the processor, i.e., an on-chip storage element, or it can be a separate storage element; this application does not limit this.

[0280] Transceiver 2113 can be used to support the reception or transmission of radio frequency (RF) signals between a communication device and a terminal. Transceiver 2113 can be connected to antenna 2115. Transceiver 2113 includes a transmitter Tx and a receiver Rx. Specifically, one or more antennas 2115 can receive RF signals. The receiver Rx of transceiver 2113 receives the RF signals from the antennas, converts the RF signals into digital baseband signals or digital intermediate frequency (IF) signals, and provides the digital baseband signals or IF signals to processor 2111 so that processor 2111 can perform further processing on the digital baseband signals or IF signals, such as demodulation and decoding. Furthermore, the transmitter Tx in transceiver 2113 is also used to receive modulated digital baseband signals or IF signals from processor 2111, convert the modulated digital baseband signals or IF signals into RF signals, and transmit the RF signals through one or more antennas 2115. Specifically, the receiver Rx can selectively perform one or more stages of downmixing and analog-to-digital conversion on the radio frequency signal to obtain a digital baseband signal or a digital intermediate frequency (IF) signal. The order of these downmixing and IF conversion processes is adjustable. The transmitter Tx can selectively perform one or more stages of upmixing and digital-to-analog conversion on the modulated digital baseband signal or digital IF signal to obtain a radio frequency signal. The order of these upmixing and IF conversion processes is also adjustable. The digital baseband signal and the digital IF signal can be collectively referred to as digital signals.

[0281] The transceiver 2113 can also be called a transceiver unit, transceiver, transceiver device, etc. Optionally, the device in the transceiver unit that performs the receiving function can be regarded as the receiving unit, and the device in the transceiver unit that performs the transmitting function can be regarded as the transmitting unit. That is, the transceiver unit includes a receiving unit and a transmitting unit. The receiving unit can also be called a receiver, input port, receiving circuit, etc., and the transmitting unit can be called a transmitter, transmitter, or transmitting circuit, etc.

[0282] It should be noted that the communication device 2100 shown in Figure 21 can be used to implement the steps implemented by the terminal device or the first base station in the aforementioned method embodiments, and achieve the corresponding technical effects. The specific implementation of the communication device 2100 shown in Figure 21 can be referred to the description in the aforementioned method embodiments, and will not be repeated here.

[0283] This application also provides a computer-readable storage medium for storing one or more computer-executable instructions. When the computer-executable instructions are executed by a processor, the processor performs the method described in the possible implementation of the communication device (e.g., a terminal device or a first base station) as described in the foregoing embodiments.

[0284] This application also provides a computer program product (or computer program) that, when executed by a processor, allows the processor to execute the method described above for implementing a communication device (e.g., a terminal device or a first base station).

[0285] This application also provides a chip system including at least one processor for supporting a communication device in implementing the functions involved in the possible implementations of the communication device described above. Optionally, the chip system further includes an interface circuit that provides program instructions and / or data to the at least one processor. In one possible design, the chip system may further include a memory for storing the program instructions and data necessary for the communication device. The chip system may be composed of chips or may include chips and other discrete devices, wherein the communication device may specifically be the terminal device or base station in the foregoing method embodiments.

[0286] This application also provides a communication system, the network system architecture of which includes the terminal device and the first base station in any of the above embodiments.

[0287] In the several embodiments provided in this application, it should be understood that the disclosed systems, apparatuses, and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection between apparatuses or units through some interfaces, and may be electrical, mechanical, or other forms.

[0288] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0289] Furthermore, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit. If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0290] References to "one embodiment" or "some embodiments" as described in this application mean that one or more embodiments of this application include a specific feature, structure, or characteristic described in connection with that embodiment. Therefore, the phrases "in one embodiment," "in some embodiments," "in other embodiments," "in still other embodiments," etc., appearing in different parts of this specification do not necessarily refer to the same embodiment, but rather mean "one or more, but not all, embodiments," unless otherwise specifically emphasized. The terms "comprising," "including," "having," and variations thereof mean "including but not limited to," unless otherwise specifically emphasized.

[0291] In the description of this application, unless otherwise stated, " / " means "or". For example, A / B can mean A or B. "And / or" in this document is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, and B alone. Furthermore, "at least one" means one or more, and "multiple" means two or more. "At least one of the following" or similar expressions refer to any combination of these items, including any combination of single or multiple items. For example, at least one of a, b, or c can represent: a, b, c; a and b; a and c; b and c; or a and b and c. Where a, b, and c can be single or multiple.

[0292] It is understood that in this application, "instruction" can include direct instruction, indirect instruction, explicit instruction, and implicit instruction. When describing a certain instruction information to indicate A, it can be understood that the instruction information carries A, directly indicates A, or indirectly indicates A.

Claims

1. A method for configuring a demodulation reference signal, characterized in that, The method includes: The terminal device obtains configuration information of the intelligent reflective surface device sent by the first base station. The intelligent reflective surface device is controlled by the second base station, and the frequency band of the second base station is adjacent to the frequency band of the first base station. The terminal device determines the performance parameters based on the configuration information of the intelligent reflective surface device; In response to determining that the performance parameters meet the demodulation reference signal configuration conditions, the terminal device determines first index information, the first index information including at least a first time slot index; The terminal device sends first adjustment information to the first base station. The first adjustment information is determined based on the first index information. The first adjustment information is used to instruct the first base station to execute a demodulation reference signal configuration scheme according to the first index information.

2. The method according to claim 1, characterized in that, The terminal device determines performance parameters based on the configuration information of the intelligent reflective surface device, including: The terminal device determines m time slots in the physical downlink shared channel whose decoding rate is lower than the decoding rate threshold, where m is a positive integer; The terminal device determines n symbols in the m time slots whose adjacent phase difference is greater than the phase difference threshold, where n is a positive integer; The terminal device determines a second duration of consecutive symbols included in the n symbols, and the performance parameter is the second duration; The configuration information of the intelligent reflective surface device includes the first duration of the beam during beam scanning, and the demodulation reference signal configuration condition is that the second duration is equal to the first duration.

3. The method according to claim 2, characterized in that, The first index information includes the first time slot index of the m time slots and the first symbol index of the n symbols.

4. The method according to claim 3, characterized in that, The method further includes: The terminal device sends indication information to the first base station. The indication information includes an optimal beam and a first time slot index of the m time slots. The indication information is used to instruct the first base station to transmit data with the optimal beam in time slots other than the m time slots.

5. The method according to claim 3 or 4, characterized in that, The terminal device sends first adjustment information to the first base station, including: In response to determining that n is greater than the symbol number threshold and m is less than or equal to the time slot number threshold, the terminal device sends first information to the first base station. The first information includes a first identifier, which is used to instruct the first base station to map demodulation reference signal pilots on each symbol included in the m time slots. In response to determining that n is less than or equal to a symbol count threshold, the terminal device sends second information to the first base station. The second information includes a first symbol index and a second identifier for the n symbols. The first identifier is used to instruct the first base station to map demodulation reference signal pilots on the n symbols in the m time slots.

6. The method according to any one of claims 2-5, characterized in that, The method further includes: In response to determining that n is greater than the symbol count threshold and m is greater than the time slot count threshold, the terminal device adjusts the decoding rate threshold until it determines that n is less than or equal to the symbol count threshold, and / or determines that m is less than or equal to the time slot count threshold.

7. The method according to claim 1, characterized in that, The configuration information of the intelligent reflective surface device includes the target number of frames. The terminal device determines performance parameters based on the configuration information of the intelligent reflective surface device, including: The terminal device determines the throughput within the target frame, where the target frame is the number of frames after the terminal device receives the configuration information of the intelligent reflective surface device.

8. The method according to claim 7, characterized in that, The demodulation reference signal configuration condition is that the throughput is greater than or equal to the throughput threshold.

9. The method according to claim 6 or 7, characterized in that, The terminal device determines the first index information, including: The terminal device determines the first time slot index of m time slots whose decoding rate is lower than the decoding rate threshold included in the physical downlink shared channel; The terminal device determines the first symbol index of n symbols whose adjacent phase difference is greater than the phase difference threshold in the m time slots. The first index information includes the first time slot index of the m time slots and the first symbol index of the n symbols.

10. The method according to claim 9, characterized in that, The terminal device sends first adjustment information to the first base station, including: In response to determining that m is less than or equal to the number of time slots threshold, the terminal device sends third information to the first base station. The third information includes a first time slot index and a third identifier for the m time slots. The third identifier is used to instruct the first base station to map demodulation reference signal pilots on each symbol included in the m time slots. In response to determining that m is greater than the number of time slots threshold, the terminal device sends fourth information to the first base station. The fourth information includes the first time slot index of the m time slots, the first symbol index of the n symbols, and a fourth identifier. The fourth identifier is used to indicate to the first base station to map the demodulation reference signal pilot of the first symbol of each of the m time slots and the n symbols.

11. The method according to any one of claims 1-10, characterized in that, The method further includes: The terminal device determines that the index adjustment conditions are met and then determines the second index information. The terminal device sends second adjustment information to the first base station. The second adjustment information is determined based on the second index information. The second adjustment information is used to instruct the first base station to execute a demodulation reference signal configuration scheme according to the second index information.

12. A method for configuring a demodulation reference signal, characterized in that, The method includes: In response to the fulfillment of adjustment conditions, the first base station determines the configuration information of the intelligent reflective surface device, which is controlled by the second base station, and the frequency band of the second base station is adjacent to that of the first base station; The first base station sends the configuration information of the intelligent reflective surface device to the terminal device; The first base station obtains first adjustment information sent by the terminal device. The first adjustment information is determined based on first index information. The first index information includes at least a first time slot index. The first adjustment information indicates that a demodulation reference signal configuration scheme is executed according to the first index information. The first base station configures the demodulation reference signal according to the first adjustment information and the demodulation reference signal configuration scheme.

13. The method according to claim 12, characterized in that, The first base station determines the configuration information of the intelligent reflective surface device, including: The first base station sends a first request message to other base stations, the first request message being used to instruct the base station controlling the intelligent reflective surface device to provide the configuration information of the intelligent reflective surface device; The first base station obtains the configuration information of the intelligent reflective surface device sent by the second base station. The configuration information of the intelligent reflective surface device includes the first duration of the beam during beam scanning of the intelligent reflective surface device.

14. The method according to claim 12, characterized in that, The first base station determines the configuration information of the intelligent reflective surface device, including: The first base station acquires the target number of frames, and the configuration information of the RIS device includes the target number of frames.

15. The method according to claim 14, characterized in that, The method further includes: The first base station sends a first indication message to the second base station. The first indication message is used to instruct the second base station to control the smart reflective surface device to stop beam scanning within the subsequent target number of frames and transmit data with the target beam. The target beam is the beam used by the second base station in the data transmission phase of this frame.

16. The method according to any one of claims 12-15, characterized in that, The method further includes: The first base station obtains the second indication information sent by the terminal device. The second indication information includes the optimal beam and a first time slot index of m time slots. The m time slots are the m time slots included in the physical downlink shared channel with a decoding rate lower than the decoding rate threshold. The first base station transmits data using the optimal beam in time slots other than the m time slots.

17. The method according to any one of claims 12-16, characterized in that, The first adjustment information is first information, which includes a first symbol index and a first identifier for n symbols. The n symbols are n symbols in m time slots whose adjacent phase difference is greater than a phase difference threshold. The m time slots are m time slots in the physical downlink shared channel whose decoding rate is lower than a decoding rate threshold. The first identifier is used to indicate the mapping of demodulation reference signal pilots on the n symbols in the m time slots. The first base station configures the demodulation reference signal according to the first adjustment information and the demodulation reference signal configuration scheme, including: The first base station maps demodulation reference signal pilots on the n symbols of the m time slots; or, The first adjustment information is the second information, which includes a second identifier. The second identifier is used to indicate the mapping of demodulation reference signal pilots on each symbol included in the m time slots. The first base station configures the demodulation reference signal according to the first adjustment information and the demodulation reference signal configuration scheme, including: The first base station maps demodulation reference signal pilots on each symbol included in the m time slots.

18. The method according to any one of claims 12-16, characterized in that, The first adjustment information is the third information, which includes a first time slot index and a third identifier for m time slots. The m time slots are the m time slots included in the physical downlink shared channel with a decoding rate lower than the decoding rate threshold. The third identifier is used to indicate the mapping of demodulation reference signal pilots on each symbol included in the m time slots. The first base station configures the demodulation reference signal according to the first adjustment information and the demodulation reference signal configuration scheme, including: The first base station maps demodulation reference signal pilots on each symbol included in the m time slots; Alternatively, the first adjustment information is a fourth piece of information, which includes a first time slot index of m time slots, a first symbol index of n symbols, and a fourth identifier. The m time slots are the m time slots included in the physical downlink shared channel with a decoding rate lower than the decoding rate threshold. The n symbols are the n symbols included in the m time slots with an adjacent phase difference greater than the phase difference threshold. The fourth identifier is used to indicate the first symbol included in the m time slots and the demodulation reference signal pilot of the n symbols. The first base station configures the demodulation reference signal according to the first adjustment information and the demodulation reference signal configuration scheme, including: The first base station includes the first symbol in the m time slots and the n symbols in the map demodulation reference signal pilot.

19. The method according to any one of claims 12-18, characterized in that, The adjustment conditions include any one of the following: The throughput of the terminal device is less than the throughput threshold. After configuring the demodulation reference signal according to the demodulation reference signal configuration scheme indicated by the first adjustment information, the duration during which the throughput of the terminal device is greater than the throughput threshold is greater than the preset duration. After configuring the demodulation reference signal according to the demodulation reference signal configuration scheme indicated by the first adjustment information, the duration during which the throughput of the terminal device is less than the throughput threshold is greater than the preset duration.

20. The method according to any one of claims 12-19, characterized in that, The method further includes: The first base station obtains the second adjustment information sent by the terminal device. The second adjustment information is determined based on the second index information. The second index information includes at least the second time slot index. The second adjustment information indicates that a demodulation reference signal configuration scheme is executed according to the second index information. The first base station configures the demodulation reference signal according to the demodulation reference signal configuration scheme based on the second adjustment information.

21. A communication device, characterized in that, The communication device includes a transceiver module and a processing module; the transceiver module is used to perform the transceiver operation of the method as described in any one of claims 1 to 11, and the processing module is used to perform the processing operation of the method as described in any one of claims 1 to 11. or, The transceiver module is used to perform the transceiver operation of the method as described in any one of claims 12 to 20, and the processing module is used to perform the processing operation of the method as described in any one of claims 12 to 20.

22. A communication device, characterized in that, The communication device includes a processor configured to execute a computer program or computer instructions in a memory to perform the method as described in any one of claims 1 to 11, or to perform the method as described in any one of claims 12 to 20.

23. A computer-readable storage medium, characterized in that, It stores a computer program thereon, which, when executed by a communication device, causes the communication device to perform the method as described in any one of claims 1 to 11, or to perform the method as described in any one of claims 12 to 20.

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