Demodulation reference signal configuration method and terminal

Abstract

The invention discloses a demodulation reference signal configuration method and a terminal, which are used for enabling the number of additional DMRSs configured by a base station to be more adaptive to the terminal capability and the terminal environment, and are beneficial to improving the time-frequency resource utilization rate and the terminal demodulation performance / throughput rate. The method comprises the following steps: determining an additional DMRS parameter corresponding to a preset performance requirement under a current channel time-varying degree, wherein the channel time-varying degree represents a change degree of a terminal in a time domain relative to a base station; and sending the additional DMRS parameters to the base station for the base station to configure the number of the additional DMRS according to the received additional DMRS parameters.

Description

Technical Field

[0001] The present invention relates to the technical field of wireless communications, and in particular to a configuration method and terminal for a demodulation reference signal. Background Art

[0002] In base station-terminal wireless communication scenarios, there are scenarios of high-speed relative movement. In high-speed mobile scenarios, the wireless channel is prone to rapid time variations in the time domain, which can affect the demodulation performance of the data channel. To address the above problems and phenomena, the 3gpp 5G protocol configures additional demodulation pilots (Additional DMRS (Demodulation Reference Signal)) for data channels (such as PDSCH (Physical Downlink Shared Channel)).

[0003] Currently, the number of additional DMRSs is configured by the base station, and the terminal passively accepts the configuration method given by the base station. This has the following two disadvantages:

[0004] 1) The base station is unaware of the terminal's capabilities and may configure an amount of Additional DMRS that exceeds the terminal's capabilities. However, the terminal, limited by its own processing power, will only use a portion of the Additional DMRS. This results in a waste of time and frequency resources and fails to optimize throughput efficiency.

[0005] 2) The base station may not be aware of the terminal's environment in a timely manner or may not know it. The number of configured Additional DMRS may be unreasonable. For example, it may be configured too little, resulting in the terminal's demodulation capability being limited by the insufficient number of DMRS time-domain symbols, and failing to achieve higher throughput efficiency. Summary of the Invention

[0006] The present invention provides a demodulation reference signal configuration method and terminal, which are used to make the number of additional DMRS configured by the base station more adaptable to the terminal capability and terminal environment, which is conducive to improving the time-frequency resource utilization and the terminal demodulation performance / throughput.

[0007] In a first aspect, an embodiment of the present invention provides a method for configuring a demodulation reference signal, the method comprising:

[0008] Determining additional DMRS parameters corresponding to meeting preset performance requirements under the current channel time variation degree, wherein the channel time variation degree represents the degree of change of the terminal relative to the base station in the time domain;

[0009] The additional DMRS parameter is sent to the base station, so that the base station configures the number of additional DMRSs according to the received additional DMRS parameter.

[0010] The demodulation reference signal configuration method provided by the present invention determines additional DMRS parameters through the terminal and feeds them back to the base station. The base station refers to the additional DMRS parameters when configuring the number of additional DMRSs for the terminal, so that the configured number of additional DMRSs is more adapted to the terminal capabilities, which is conducive to improving the utilization of time-frequency resources; and is more compatible with the terminal environment, which is conducive to improving the terminal demodulation performance / throughput.

[0011] In a second aspect, an embodiment of the present invention provides a terminal, comprising a processor and a memory, wherein the memory is configured to store a program executable by the processor, and the processor is configured to read the program in the memory and perform the following steps:

[0012] Determining additional DMRS parameters corresponding to meeting preset performance requirements under the current channel time variation degree, wherein the channel time variation degree represents the degree of change of the terminal relative to the base station in the time domain;

[0013] The additional DMRS parameter is sent to the base station, so that the base station configures the number of additional DMRSs according to the received additional DMRS parameter.

[0014] In a third aspect, an embodiment of the present invention further provides a configuration device for a demodulation reference signal, including:

[0015] A parameter determination module is configured to determine additional DMRS parameters corresponding to a preset performance requirement under a current channel time variation degree, wherein the channel time variation degree represents a degree of change of the terminal relative to the base station in the time domain;

[0016] The parameter sending module is used to send the additional DMRS parameter to the base station, so that the base station configures the number of additional DMRS according to the received additional DMRS parameter.

[0017] In a fourth aspect, an embodiment of the present invention further provides a computer storage medium on which a computer program is stored, and when the program is executed by a processor, it is used to implement the steps of the method described in the first aspect above.

[0018] In a fifth aspect, the present application provides a computer program product, comprising: a computer program code, which, when executed on a computer, enables the computer to execute any one of the methods described in the first aspect.

[0019] These and other aspects of the present application will be more clearly understood in the description of the following embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0021] Figure 1 A schematic diagram of a PDSCH DMRS / additional DMRS provided in an embodiment of the present invention;

[0022] Figure 2 A schematic diagram of the current Additional DMRS quantity configuration provided by an embodiment of the present invention;

[0023] Figure 3 A flowchart of a method for configuring a demodulation reference signal according to an embodiment of the present invention;

[0024] Figure 4 A schematic diagram of additional DMRS configuration for a terminal to feedback additional DMRS parameters provided in an embodiment of the present invention;

[0025] Figure 5 A flowchart of a method for configuring a terminal to feedback a demodulated signal provided in an embodiment of the present invention;

[0026] Figures 6A-6B A schematic diagram of the effect of feeding back additional DMRS parameters provided by an embodiment of the present invention;

[0027] Figure 7 A schematic diagram of a terminal provided by an embodiment of the present invention;

[0028] Figure 8 A schematic diagram of a demodulation reference signal configuration device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0029] To make the objectives, technical solutions, and advantages of the present invention more apparent, the present invention will be further described in detail below with reference to the accompanying drawings. It is apparent that the embodiments described are only some, not all, of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort are intended to fall within the scope of protection of the present invention.

[0030] In embodiments of the present invention, the term "and / or" describes the association relationship between associated objects, indicating that three possible relationships exist. For example, "A and / or B" can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone. The character " / " generally indicates that the associated objects are in an "or" relationship.

[0031] A demodulation reference signal configuration method provided by an embodiment of the present invention can be applied to a terminal.

[0032] It should be noted that the terminal involved in this embodiment is a device with wireless communication capabilities, which can be deployed on land, including indoors or outdoors, handheld or vehicle-mounted; can also be deployed on water (such as ships); and can also be deployed in the air (for example, on airplanes, balloons, and satellites). The terminal can be a mobile phone, a tablet computer, a computer with wireless transceiver capabilities, a virtual reality (VR) terminal, an augmented reality (AR) terminal, a wireless terminal in industrial control, a wireless terminal in self-driving, a wireless terminal in remote medical care, a wireless terminal in a smart grid, a wireless terminal in transportation safety, a wireless terminal in a smart city, a wireless terminal in a smart home, etc. It can also be various forms of UE, mobile station (MS), or terminal device.

[0033] The application scenarios described in the embodiments of the present invention are intended to more clearly illustrate the technical solutions of the embodiments of the present invention and do not constitute a limitation on the technical solutions provided by the embodiments of the present invention. Persons skilled in the art will appreciate that as new application scenarios emerge, the technical solutions provided by the embodiments of the present invention will also be applicable to similar technical problems. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0034] Before introducing the method for configuring a demodulation reference signal provided in an embodiment of the present application, for ease of understanding, the technical background of the embodiment of the present application is first introduced in detail below.

[0035] In base station-terminal wireless communication scenarios, high-speed relative motion is common. For example, when a base station is deployed on a satellite, the base station is in a high-speed motion state; or when a terminal is a high-speed aircraft, the terminal is in a high-speed motion state. In high-speed motion scenarios, the wireless channel is prone to rapid time-varying in the time domain. This phenomenon affects the demodulation performance of the data channel: within a time slot, due to the time-varying channel, the difference between the air interface channel and the channel estimate estimated by the reference signal increases for symbols farther from the reference signal, resulting in poor data demodulation performance for these symbols far from the reference signal.

[0036] In response to the above problems and phenomena, the 3gpp 5G protocol configures the data channel (PDSCH) with Additional DMRS (Additional Demodulation Pilot), and there are multiple configuration methods. Figure 1 As shown, a PDSCH DMRS / Additional DMRS schematic diagram is provided, which shows a time-frequency domain schematic diagram of PDSCH configuration of 0 to 3 Additional DMRS. For all possible configuration methods, please refer to Table 7.4.1.1.2-2 to Table 7.4.1.1.2-4 of the 3gpp 38.211 protocol. Figure 1 Taking the sending of two Additional DMRSs as an example, the terminal side may adopt a solution of using the DMRS on symbol 2 and the Additional DMRS on symbols 7 and 11 to perform time domain channel estimation interpolation, thereby obtaining the channel estimation value on symbols 0 to 13.

[0037] like Figure 2 As shown, a schematic diagram of the current Additional DMRS number configuration is provided. In the prior art, the number of Additional DMRS is configured by the base station, and the terminal side passively accepts the configuration method given by the base station, which has the following two disadvantages:

[0038] 1) The base station is unaware of the terminal's capabilities and may configure an amount of Additional DMRS that exceeds the terminal's capabilities. However, the terminal, limited by its own processing power, will only use a portion of the Additional DMRS. This results in a waste of time and frequency resources and fails to optimize throughput efficiency.

[0039] 2) The base station may not be aware of the terminal's environment in a timely manner or may not know it at all. The number of configured Additional DMRS may be unreasonable. For example, it may be configured too little, resulting in the terminal's demodulation capability being limited by the insufficient number of DMRS time-domain symbols, and unable to achieve higher throughput efficiency.

[0040] Based on this, this embodiment provides a method for configuring a demodulation reference signal, by calculating additional DMRS parameters that meet preset performance requirements under the current channel time-varying degree, and feeding back the additional DMRS parameters to the base station, so that the base station determines the number of additional DMRSs that is more in line with the terminal capabilities and performance requirements based on the fed-back additional DMRS parameters, thereby optimizing the throughput efficiency.

[0041] like Figure 3 As shown, the demodulation reference signal configuration method provided in this embodiment can be applied to a terminal. The implementation process of the method is as follows:

[0042] Step 300: Determine additional DMRS parameters corresponding to a preset performance requirement under a current channel time variation degree, where the channel time variation degree indicates a degree of change of the terminal relative to the base station in the time domain;

[0043] The greater the channel time variation, the greater the time domain variation of the terminal relative to the base station, and the faster the terminal moves relative to the base station. Conversely, the smaller the channel time variation, the smaller the time domain variation of the terminal relative to the base station, and the slower the terminal moves relative to the base station.

[0044] Optionally, the terminal determines the timing for additional DMRS parameters, including but not limited to, when the terminal determines that the current channel time-varying degree is higher than a threshold, determining the additional DMRS parameters corresponding to the preset performance requirements under the current channel time-varying degree; or, when the terminal determines that the performance indicators under the current channel time-varying degree do not meet the preset performance requirements, determining the additional DMRS parameters corresponding to the preset performance requirements under the current channel time-varying degree.

[0045] Optionally, different channel time-varying degrees correspond to different additional DMRS parameters. At the same time, in order to ensure terminal performance requirements, when calculating the additional DMRS parameters under the current channel time-varying degree, it is also necessary to meet the preset performance requirements. The additional DMRS parameters thus calculated include the terminal's own capabilities, as well as the measurement and statistical results of the performance and environment. When the additional DMRS parameters are fed back to the base station, the number of additional DMRSs determined by the base station based on the additional DMRS parameters is more adapted to the terminal capabilities and terminal environment, which is conducive to improving time-frequency resource utilization and demodulation performance / throughput.

[0046] In some embodiments, this embodiment may determine the current channel time variation degree by any one or more of the following methods:

[0047] Method 1a) Determine the current channel time variation based on global navigation satellite system and ephemeris measurement information;

[0048] During implementation, the terminal may calculate the time-varying degree of the terminal's current channel based on GNSS (Global Navigation Satellite System) measurement information, such as measured speed and other information, and satellite ephemeris measurement information.

[0049] Mode 1b) Determine the current channel time variation degree based on the Doppler spread calculated from the reference signal.

[0050] During implementation, the terminal may calculate the Doppler spread based on the reference signal sent by the base station, and determine the current channel time variation degree based on the magnitude of the Doppler spread.

[0051] In some embodiments, the additional DMRS parameters corresponding to the preset performance requirements under the current channel time variation are determined by the following steps:

[0052] Step a, determining the current signal-to-noise ratio measurement value;

[0053] During implementation, the terminal determines the current channel time-variance level and calculates the current signal-to-noise ratio (SNR) under the current channel time-variance level to obtain a current SNR measurement value. The SNR measurement values ​​obtained by the same terminal under different channel time-variance levels may be different. To more accurately measure the number of additional DMRSs required by the terminal under the current channel time-variance level, the number of additional DMRSs required by the terminal is determined.

[0054] Step b: determining the additional DMRS parameters corresponding to the current channel time variation degree and the current signal-to-noise ratio measurement value according to the pre-stored mapping relationship between the channel time variation degree, the signal-to-noise ratio threshold value and the additional DMRS parameters;

[0055] The signal-to-noise ratio threshold value is the signal-to-noise ratio threshold corresponding to the channel time-varying degree and the additional DMRS parameter in the mapping relationship table when the terminal meets the preset performance requirement.

[0056] In this embodiment, when the additional DMRS parameter in the pre-stored mapping relationship includes the number of additional DMRSs, the number of additional DMRSs includes the maximum number of additional DMRSs that the terminal can process. That is, when determining the mapping relationship, the terminal determines the signal-to-noise ratio threshold value currently corresponding to the terminal, which is less than or equal to the maximum number of additional DMRSs and under different degrees of channel time variation, based on the maximum number of additional DMRSs that the terminal can support.

[0057] During implementation, this embodiment calculates the signal-to-noise ratio threshold value obtained under each channel time variation degree and each additional DMRS parameter in advance based on the historical information of the terminal, including the channel time variation degree and different additional DMRS parameters in the historical period, thereby obtaining a mapping relationship including the signal-to-noise ratio threshold values ​​corresponding to different channel time variation degrees and additional DMRS parameters.

[0058] For example, the terminal determines the mapping relationship based on its own ability to process the number of additional DMRS, performance statistics (such as demodulation threshold, throughput configuration, etc.), movement speed (for example, determined according to GNSS), and Doppler spread (for example, obtained based on the estimation of the reference signal), and calculates the signal-to-noise ratio measurement corresponding to the current channel time-varying degree based on the mapping relationship. According to the current channel time-varying degree and the signal-to-noise ratio measurement value, the corresponding additional DMRS parameters are determined from the mapping relationship, such as the corresponding number of additional DMRS, and fed back to the base station.

[0059] In some embodiments, the pre-stored mapping relationship between the channel time variation degree, the signal-to-noise ratio threshold, and the additional DMRS parameter may be determined by the following steps:

[0060] Step a1) determining, based on the capability of processing the number of additional DMRSs, a signal-to-noise ratio threshold corresponding to meeting preset performance requirements under different channel time variation degrees and different additional DMRS parameters;

[0061] In implementation, the maximum number of additional DMRSs supported by the terminal is determined based on the terminal's ability to process the number of additional DMRSs, thereby calculating each channel time variation degree and each signal-to-noise ratio threshold value less than or equal to the maximum number of additional DMRSs.

[0062] Step a2) determining a mapping relationship between the channel time variation degree, the signal-to-noise ratio threshold and the additional DMRS parameter according to different channel time variation degrees and the signal-to-noise ratio threshold values ​​corresponding to different additional DMRS parameters.

[0063] Optionally, different additional DMRS parameters include different numbers of additional DMRSs, where the different numbers of additional DMRSs are less than or equal to the maximum number of additional DMRSs supported by the terminal. Assuming that the terminal processing capability can only support a maximum of 2 additional DMRSs, even if the protocol supports configuration of a maximum of 3 additional DMRSs, the maximum number of additional DMRSs in the mapping relationship is only 2.

[0064] For example, if the maximum number of additional DMRSs that the terminal can support is 3, the signal-to-noise ratio threshold value under 1 additional DMRS and different channel time-varying degrees, the signal-to-noise ratio threshold value under 2 additional DMRSs and different channel time-varying degrees, and the signal-to-noise ratio threshold value under 3 additional DMRSs and different channel time-varying degrees are calculated to obtain a mapping relationship and store the mapping relationship.

[0065] Optionally, different additional DMRS parameters include different additional DMRS quantity intervals, where the maximum number included in the quantity interval is less than or equal to the maximum number of additional DMRSs supported by the terminal. For example, if the maximum number of additional DMRSs supported by the terminal is 3, the quantity interval includes but is not limited to [1, 2] and [2, 3].

[0066] It should be noted that the granularity of different channel time-varying degrees in this embodiment can be defined according to needs. For example, the channel time-varying degree can be defined as M gears, and the number of gears can be adjusted according to needs. The more gears, the smaller the granularity of the channel time-varying degree division. Conversely, the fewer gears, the larger the granularity of the channel time-varying degree division.

[0067] In some embodiments, the mapping relationship in this embodiment can be fixed or updated in real time by the terminal based on historical information. For example, the terminal obtains the time-varying degrees of different channels and additional DMRS parameters within a set period at intervals, thereby calculating the corresponding signal-to-noise ratio threshold value within the period, obtaining the mapping relationship corresponding to the period, and updating the mapping relationship of the previous period stored by the terminal to the mapping relationship of the terminal in the current period. This allows the terminal to obtain real-time measurement and statistical results of performance and environment, thereby improving terminal demodulation performance.

[0068] The mapping relationship in this embodiment can be stored in a table. For example, the dimension of the stored mapping relationship table is "channel time variation degree × number of additional DMRSs", and the content of the mapping relationship table is the signal-to-noise ratio threshold value corresponding to the demodulation threshold (such as BLER (BLock Error Rate)) or throughput configuration (throughput / rate). The mapping relationship table in this embodiment means that the terminal, based on its own capabilities, pre-calculates the signal-to-noise ratio threshold corresponding to achieving a certain demodulation performance under different channel time variation degrees and different numbers of additional DMRSs.

[0069] During implementation, if the current signal-to-noise ratio measurement value is equal to the signal-to-noise ratio threshold value in the mapping relationship, the additional DMRS parameters corresponding to the current signal-to-noise ratio measurement value and the current channel time-varying degree in the mapping relationship are determined as the additional DMRS parameters corresponding to the current channel time-varying degree and the current signal-to-noise ratio measurement value.

[0070] Typically, the current signal-to-noise ratio measurement value calculated by the terminal is not equal to the signal-to-noise ratio threshold value in the mapping relationship. If the current signal-to-noise ratio measurement value is not equal to the signal-to-noise ratio threshold value in the mapping relationship, this embodiment determines the additional DMRS parameter corresponding to the current channel time variation degree and the current signal-to-noise ratio measurement value by any of the following methods:

[0071] Method a) Determine the corresponding additional DMRS parameters based on the signal-to-noise ratio threshold closest to the current signal-to-noise ratio measurement value in the mapping relationship and the current channel time variation degree;

[0072] During implementation, a mapping relationship is searched, and the SNR threshold closest to the current SNR measurement value and the additional DMRS quantity corresponding to the current channel time variation degree are determined as the additional DMRS parameters corresponding to the current channel time variation degree and the current SNR measurement value.

[0073] Method b) determining the corresponding additional DMRS parameters based on the minimum value of the signal-to-noise ratio threshold values ​​greater than the current signal-to-noise ratio measurement value in the mapping relationship and the current channel time variation degree;

[0074] During implementation, a mapping relationship is searched, and the minimum value of the signal-to-noise ratio threshold values ​​greater than the current signal-to-noise ratio measurement value and the number of additional DMRSs corresponding to the current channel time variation degree are determined as additional DMRS parameters corresponding to the current channel time variation degree and the current signal-to-noise ratio measurement value.

[0075] Method c) determining the corresponding additional DMRS parameters based on the maximum value of the signal-to-noise ratio threshold that is less than the current signal-to-noise ratio measurement value in the mapping relationship and the current channel time variation degree;

[0076] During implementation, a mapping relationship is searched, and the maximum value of the signal-to-noise ratio threshold smaller than the current signal-to-noise ratio measurement value and the number of additional DMRSs corresponding to the current channel time variation degree are determined as additional DMRS parameters corresponding to the current channel time variation degree and the current signal-to-noise ratio measurement value.

[0077] Mode d) Determine the corresponding additional DMRS parameters according to the minimum signal-to-noise ratio threshold interval containing the current signal-to-noise ratio measurement value in the mapping relationship and the current channel time variation degree.

[0078] During implementation, a mapping relationship is searched and the minimum signal-to-noise ratio threshold interval including the current signal-to-noise ratio measurement value and the additional DMRS number interval corresponding to the current channel time variation degree are determined as additional DMRS parameters corresponding to the current channel time variation degree and the current signal-to-noise ratio measurement value.

[0079] Step 301: Send the additional DMRS parameters to a base station, so that the base station configures the number of additional DMRSs according to the received additional DMRS parameters.

[0080] The number of additional DMRSs configured by the base station is used for terminal demodulation reference signals.

[0081] In some embodiments, the additional DMRS parameter includes the number of additional DMRSs, or the number interval of additional DMRSs.

[0082] During implementation, the terminal searches for the corresponding number or number interval of additional DMRS from the mapping relationship based on the current channel time variation degree and the current signal-to-noise ratio measurement value currently measured in real time. The number or number interval of additional DMRS is carried in the message fed back to the base station and fed back to the base station through an uplink channel such as PUSCH. The base station configures the number of additional DMRS for the terminal based on the number or number interval of additional DMRS received, combined with the measurement, performance statistics and overall scheduling strategy at the base station. The base station can use the number fed back by the terminal as the number of additional DMRS configured for the terminal, or the base station can configure an additional DMRS less than or equal to the number fed back to the terminal in combination with the global throughput configuration.

[0083] In one case, the number of additional DMRSs determined by the terminal is fed back to the base station, and the base station uses the fed-back number of additional DMRSs as the number of additional DMRSs configured for the terminal. Alternatively, the base station configures a number of additional DMRSs less than or equal to the fed-back number of additional DMRSs and a global throughput configuration for the terminal. The throughput configuration includes but is not limited to throughput, throughput rate, etc.

[0084] Another situation is that the number interval of additional DMRS determined by the terminal is fed back to the base station, and the base station selects any number of additional DMRS from the fed-back number interval of additional DMRS as the number of additional DMRS configured for the terminal, or the base station configures the number of additional DMRS within the number interval for the terminal based on the fed-back number interval of additional DMRS and the global throughput configuration.

[0085] like Figure 4 As shown, this embodiment provides a schematic diagram of additional DMRS configuration in which a terminal feeds back additional DMRS parameters. After the terminal feeds back additional DMRS parameters to the base station based on its own capabilities, parameter estimation, performance statistics and other factors, the base station refers to the additional DMRS parameters fed back by the terminal, combines its own measurements, statistics and overall scheduling measurements, and configures the additional DMRS configuration method for the terminal, such as the number of additional DMRS and other information.

[0086] like Figure 5 As shown, this embodiment provides a configuration method for a terminal to feedback a demodulated signal. The specific implementation process of the method is as follows:

[0087] Step 500: The terminal determines, based on its ability to process the number of additional DMRSs, a signal-to-noise ratio threshold corresponding to a preset performance requirement under different channel time variation degrees and different additional DMRS parameters;

[0088] Step 501: The terminal determines a mapping relationship between the channel time variation degree, the signal-to-noise ratio threshold, and the additional DMRS parameters according to the signal-to-noise ratio thresholds corresponding to different channel time variation degrees and different additional DMRS parameters.

[0089] The terminal pre-stores the mapping relationship locally.

[0090] Step 502: The terminal determines the current channel time variation degree and the current signal-to-noise ratio measurement value;

[0091] Step 503: The terminal determines, based on the mapping relationship, additional DMRS parameters corresponding to the current channel time variation degree and the current signal-to-noise ratio measurement value;

[0092] Step 504: The terminal sends the additional DMRS parameters to the base station;

[0093] In implementation, when the additional DMRS parameter includes the number of additional DMRSs, encoding values ​​corresponding to different additional DMRS numbers can be defined. The additional DMRS number can be carried using fewer bits and sent to the base station, reducing resource usage and allowing more terminals to simultaneously send additional DMRS parameters to the base station and request the number of additional DMRSs configured by the base station. For example, if three additional DMRSs are defined as 3, when a terminal sends 3 to the base station, the base station can configure three additional DMRSs for the terminal for demodulation after receiving 3. The terminal can carry the additional DMRS parameters in the PUSCH message and feedback it to the base station.

[0094] Step 505: The base station configures the number of additional DMRSs for demodulation reference signals according to the received additional DMRS parameters.

[0095] like Figures 6A-6B As shown, this embodiment further provides a schematic diagram of the effect of feeding back additional DMRS parameters. In the figure, the front DMRS (Front DMRS) and the additional DMRS (Additional DMRS) together constitute the DMRS in one time slot of the PDSCH channel. Figure 6A In the example, the base station configures one additional DMRS for the terminal, and the terminal feeds back a feedback signal carrying additional DMRS parameters to the base station. It is recommended that the base station configure two additional DMRS parameters. Figure 6B In the example, the base station configures 2 additional DMRSs for the terminal, and the terminal feeds back a feedback signal carrying additional DMRS parameters to the base station. It is recommended that the base station configure 1 additional DMRS parameter.

[0096] This embodiment adds an additional DMRS parameter to the terminal feedback, indicating the number of additional DMRSs recommended by the terminal. For example, the parameter ranges from 0 to 3. This parameter reflects both the terminal's capabilities and the terminal's performance and environmental measurements and statistics. When configuring the additional DMRS number for the terminal, the base station references the additional DMRS parameter provided by the terminal. This ensures that the configured additional DMRS number is more tailored to the terminal's capabilities, improving time-frequency resource utilization and the terminal's environment, thereby enhancing demodulation performance and throughput.

[0097] Based on the same inventive concept, an embodiment of the present invention further provides a terminal. Since the terminal is the terminal in the method in the embodiment of the present invention, and the principle of solving the problem by the terminal is similar to that of the method, the implementation of the terminal can refer to the implementation of the method, and the repeated parts will not be repeated.

[0098] like Figure 7 As shown, the terminal includes a processor 700 and a memory 701, wherein the memory 701 is used to store a program executable by the processor 700, and the processor 700 is used to read the program in the memory 701 and perform the following steps:

[0099] Determining additional DMRS parameters corresponding to meeting preset performance requirements under the current channel time variation degree, wherein the channel time variation degree represents the degree of change of the terminal relative to the base station in the time domain;

[0100] The additional DMRS parameter is sent to the base station, so that the base station configures the number of additional DMRSs according to the received additional DMRS parameter.

[0101] As an optional implementation manner, the processor 700 is specifically configured to execute:

[0102] determining a current signal-to-noise ratio measurement;

[0103] Determine, based on a pre-stored mapping relationship between a channel time variation degree, a signal-to-noise ratio threshold, and an additional DMRS parameter, an additional DMRS parameter corresponding to a current channel time variation degree and a current signal-to-noise ratio measurement value;

[0104] The signal-to-noise ratio threshold value is the signal-to-noise ratio threshold corresponding to the channel time-varying degree and the additional DMRS parameter in the mapping relationship table when the terminal meets the preset performance requirement.

[0105] As an optional implementation manner, if the current signal-to-noise ratio measurement value is not equal to the signal-to-noise ratio threshold value in the mapping relationship, the processor 700 is specifically configured to execute:

[0106] Determine the corresponding additional DMRS parameters according to the signal-to-noise ratio threshold closest to the current signal-to-noise ratio measurement value and the current channel time variation degree in the mapping relationship; or,

[0107] Determine the corresponding additional DMRS parameter according to the minimum value of the signal-to-noise ratio threshold values ​​greater than the current signal-to-noise ratio measurement value in the mapping relationship and the current channel time variation degree; or,

[0108] Determine the corresponding additional DMRS parameter according to the maximum value of the signal-to-noise ratio threshold that is less than the current signal-to-noise ratio measurement value in the mapping relationship and the current channel time variation degree; or,

[0109] The corresponding additional DMRS parameters are determined according to the minimum signal-to-noise ratio threshold interval containing the current signal-to-noise ratio measurement value in the mapping relationship and the current channel time variation degree.

[0110] As an optional implementation manner, the processor 700 is specifically configured to determine a pre-stored mapping relationship between a channel time variation degree, a signal-to-noise ratio threshold, and an additional DMRS parameter in the following manner:

[0111] Determine, based on the ability to process the number of additional DMRSs, a signal-to-noise ratio threshold corresponding to meeting preset performance requirements under different channel time variation levels and different additional DMRS parameters;

[0112] According to different channel time variation degrees and signal-to-noise ratio thresholds corresponding to different additional DMRS parameters, a mapping relationship among the channel time variation degree, the signal-to-noise ratio threshold and the additional DMRS parameters is determined.

[0113] As an optional implementation manner, the processor 700 is specifically configured to determine the current channel time variation degree in the following manner:

[0114] Determine the current channel time variation based on global navigation satellite system and ephemeris measurement information; or,

[0115] The Doppler spread calculated based on the reference signal is used to determine the current channel time variation.

[0116] As an optional implementation manner, the additional DMRS parameter includes the number of additional DMRSs, or the number interval of additional DMRSs.

[0117] Based on the same inventive concept, an embodiment of the present invention also provides a configuration device for a demodulation reference signal. Since the device is the device in the method in the embodiment of the present invention, and the principle of solving the problem by the device is similar to that of the method, the implementation of the device can refer to the implementation of the method, and the repeated parts will not be repeated.

[0118] like Figure 8 As shown, the device includes:

[0119] A parameter determination module 800 is configured to determine additional DMRS parameters corresponding to a preset performance requirement under a current channel time variation degree, wherein the channel time variation degree indicates a degree of change of the terminal relative to the base station in the time domain;

[0120] The parameter sending module 801 is configured to send the additional DMRS parameter to a base station, so that the base station configures the number of additional DMRSs according to the received additional DMRS parameter.

[0121] As an optional implementation manner, the parameter determination module 800 is specifically configured to:

[0122] determining a current signal-to-noise ratio measurement;

[0123] Determine, based on a pre-stored mapping relationship between a channel time variation degree, a signal-to-noise ratio threshold, and an additional DMRS parameter, an additional DMRS parameter corresponding to a current channel time variation degree and a current signal-to-noise ratio measurement value;

[0124] The signal-to-noise ratio threshold value is the signal-to-noise ratio threshold corresponding to the channel time-varying degree and the additional DMRS parameter in the mapping relationship table when the terminal meets the preset performance requirement.

[0125] As an optional implementation manner, if the current signal-to-noise ratio measurement value is not equal to the signal-to-noise ratio threshold value in the mapping relationship, the parameter determination module 800 is specifically configured to:

[0126] Determine the corresponding additional DMRS parameters according to the signal-to-noise ratio threshold closest to the current signal-to-noise ratio measurement value and the current channel time variation degree in the mapping relationship; or,

[0127] Determine the corresponding additional DMRS parameter according to the minimum value of the signal-to-noise ratio threshold values ​​greater than the current signal-to-noise ratio measurement value in the mapping relationship and the current channel time variation degree; or,

[0128] Determine the corresponding additional DMRS parameter according to the maximum value of the signal-to-noise ratio threshold that is less than the current signal-to-noise ratio measurement value in the mapping relationship and the current channel time variation degree; or,

[0129] The corresponding additional DMRS parameters are determined according to the minimum signal-to-noise ratio threshold interval containing the current signal-to-noise ratio measurement value in the mapping relationship and the current channel time variation degree.

[0130] As an optional implementation manner, the parameter determination module 800 is specifically configured to determine a pre-stored mapping relationship between a channel time variation degree, a signal-to-noise ratio threshold, and an additional DMRS parameter in the following manner:

[0131] Determine, based on the ability to process the number of additional DMRSs, a signal-to-noise ratio threshold corresponding to meeting preset performance requirements under different channel time variation levels and different additional DMRS parameters;

[0132] According to different channel time variation degrees and signal-to-noise ratio thresholds corresponding to different additional DMRS parameters, a mapping relationship among the channel time variation degree, the signal-to-noise ratio threshold and the additional DMRS parameters is determined.

[0133] As an optional implementation manner, the parameter determination module 800 is specifically configured to determine the current channel time variation degree in the following manner:

[0134] Determine the current channel time variation based on global navigation satellite system and ephemeris measurement information; or,

[0135] The Doppler spread calculated based on the reference signal is used to determine the current channel time variation.

[0136] As an optional implementation manner, the additional DMRS parameter includes the number of additional DMRSs, or the number interval of additional DMRSs.

[0137] Based on the same inventive concept, embodiments of the present disclosure provide a computer storage medium comprising computer program code. When executed on a computer, the computer program code causes the computer to execute any of the demodulation reference signal configuration methods discussed above. Because the principles underlying the problem solved by the computer storage medium are similar to those of the demodulation reference signal configuration method, the implementation of the computer storage medium can be referenced to the implementation of the method, and any repetitions are omitted.

[0138] In a specific implementation process, computer storage media may include: Universal Serial Bus Flash Drive (USB), mobile hard disk, Read-Only Memory (ROM), Random Access Memory (RAM), magnetic disk or optical disk, and other storage media that can store program code.

[0139] Based on the same inventive concept, embodiments of the present disclosure further provide a computer program product, comprising: computer program code, which, when executed on a computer, causes the computer to perform any of the demodulation reference signal configuration methods discussed above. Because the principles underlying the problems solved by the computer program product are similar to those of the demodulation reference signal configuration method, the implementation of the computer program product can be referenced to the implementation of the method, and any repetitions will be omitted.

[0140] The computer program product can employ any combination of one or more readable media. The readable medium can be a readable signal medium or a readable storage medium. The readable storage medium can be, for example, but not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, device or component, or any combination thereof. More specific examples (non-exhaustive list) of readable storage media include: an electrical connection with one or more wires, a portable disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination thereof.

[0141] Those skilled in the art will appreciate that embodiments of the present invention may be provided as methods, systems, or computer program products. Thus, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware. Furthermore, the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to magnetic disk storage and optical storage, etc.) containing computer-usable program code.

[0142] The present invention is described with reference to flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowcharts and / or block diagrams, as well as combinations of processes and / or blocks in the flowcharts and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowcharts and / or block diagrams. Figure 1 a process or multiple processes and / or boxes Figure 1 A device that performs the functions specified in one or more boxes.

[0143] These computer program instructions may also be stored in a computer readable memory that can direct a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer readable memory produce an article of manufacture including an instruction device, which implements the process Figure 1 a process or multiple processes and / or boxes Figure 1 The function specified in one or more boxes.

[0144] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operational steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing the instructions executed on the computer or other programmable device for implementing the process. Figure 1 a process or multiple processes and / or boxes Figure 1 A step that specifies a function in one or more boxes.

[0145] Obviously, those skilled in the art may make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if such changes and modifications fall within the scope of the claims and their equivalents, the present invention is intended to include such changes and modifications.

Claims

1. A method for configuring a demodulation reference signal, characterized in that: The method includes: Determine additional DMRS parameters corresponding to the preset performance requirements under the current channel time variation degree, wherein the channel time variation degree represents the degree of change of the terminal relative to the base station in the time domain; The additional DMRS parameter is sent to a base station, so that the base station configures the number of additional DMRSs according to the received additional DMRS parameter.

2. The method according to claim 1, characterized in that The determining of the additional DMRS parameters corresponding to the preset performance requirements under the current channel time variation degree includes: determining a current signal-to-noise ratio measurement; Determine the additional DMRS parameter corresponding to the current channel time variation degree and the current signal-to-noise ratio measurement value according to the pre-stored mapping relationship between the channel time variation degree, the signal-to-noise ratio threshold value and the additional DMRS parameter; The signal-to-noise ratio threshold value is the signal-to-noise ratio threshold corresponding to the channel time-varying degree and the additional DMRS parameter in the mapping relationship table when the terminal meets the preset performance requirement.

3. The method according to claim 2, characterized in that If the current signal-to-noise ratio measurement value is not equal to the signal-to-noise ratio threshold value in the mapping relationship, then determining an additional DMRS parameter corresponding to the current channel time variation degree and the current signal-to-noise ratio measurement value, including: Determine the corresponding additional DMRS parameter according to the signal-to-noise ratio threshold closest to the current signal-to-noise ratio measurement value and the current channel time variation degree in the mapping relationship; or, Determine the corresponding additional DMRS parameter according to the minimum value of the signal-to-noise ratio threshold values ​​greater than the current signal-to-noise ratio measurement value in the mapping relationship and the current channel time variation degree; or, Determine the corresponding additional DMRS parameter according to the maximum value of the signal-to-noise ratio threshold that is less than the current signal-to-noise ratio measurement value in the mapping relationship and the current channel time variation degree; or, The corresponding additional DMRS parameters are determined according to the minimum signal-to-noise ratio threshold interval containing the current signal-to-noise ratio measurement value in the mapping relationship and the current channel time variation degree.

4. The method according to claim 2, characterized in that: The mapping relationship between the pre-stored channel time variation degree, the signal-to-noise ratio threshold and the additional DMRS parameter is determined in the following manner: According to the capability of processing the number of additional DMRS, determine the signal-to-noise ratio threshold corresponding to the preset performance requirement under different channel time variation degrees and different additional DMRS parameters; According to different channel time-varying degrees and signal-to-noise ratio thresholds corresponding to different additional DMRS parameters, a mapping relationship between the channel time-varying degree, the signal-to-noise ratio threshold and the additional DMRS parameter is determined.

5. The method according to claim 1, characterized in that The current channel time variation degree is determined by: Determine the current channel time variation based on the measurement information of the global navigation satellite system and the ephemeris; or, The Doppler spread calculated based on the reference signal is used to determine the current channel time variation degree.

6. The method according to any one of claims 1 to 5, characterized in that: The additional DMRS parameter includes the number of additional DMRSs, or a number range of additional DMRSs.

7. A terminal, characterized in that: The terminal includes a processor and a memory, wherein the memory is used to store a program executable by the processor, and the processor is used to read the program in the memory and perform the following steps: Determine additional DMRS parameters corresponding to the preset performance requirements under the current channel time variation degree, wherein the channel time variation degree represents the degree of change of the terminal relative to the base station in the time domain; The additional DMRS parameter is sent to a base station, so that the base station configures the number of additional DMRSs according to the received additional DMRS parameter.

8. The terminal according to claim 7, characterized in that: The processor is specifically configured to execute: determining a current signal-to-noise ratio measurement; Determine the additional DMRS parameter corresponding to the current channel time variation degree and the current signal-to-noise ratio measurement value according to the pre-stored mapping relationship between the channel time variation degree, the signal-to-noise ratio threshold value and the additional DMRS parameter; The signal-to-noise ratio threshold value is the signal-to-noise ratio threshold corresponding to the channel time-varying degree and the additional DMRS parameter in the mapping relationship table when the terminal meets the preset performance requirement.

9. The terminal according to claim 8, characterized in that: If the current signal-to-noise ratio measurement value is not equal to any signal-to-noise ratio threshold value in the mapping relationship, the processor is specifically configured to execute: Determine the corresponding additional DMRS parameter according to the signal-to-noise ratio threshold closest to the current signal-to-noise ratio measurement value and the current channel time variation degree in the mapping relationship; or, Determine the corresponding additional DMRS parameter according to the minimum value of the signal-to-noise ratio threshold value greater than the current signal-to-noise ratio measurement value in the mapping relationship and the current channel time variation degree; or, Determine the corresponding additional DMRS parameter according to the maximum value of the signal-to-noise ratio threshold that is less than the current signal-to-noise ratio measurement value in the mapping relationship and the current channel time variation degree; or, The corresponding additional DMRS parameters are determined according to the minimum signal-to-noise ratio threshold interval containing the current signal-to-noise ratio measurement value in the mapping relationship and the current channel time variation degree.

10. The terminal according to claim 8, characterized in that: The processor is specifically configured to determine a pre-stored mapping relationship between a channel time variation degree, a signal-to-noise ratio threshold, and an additional DMRS parameter in the following manner: According to the capability of processing the number of additional DMRS, determine the signal-to-noise ratio threshold corresponding to the preset performance requirement under different channel time variation degrees and different additional DMRS parameters; According to different channel time-varying degrees and signal-to-noise ratio thresholds corresponding to different additional DMRS parameters, a mapping relationship between the channel time-varying degree, the signal-to-noise ratio threshold and the additional DMRS parameter is determined.

11. The terminal according to claim 7, characterized in that: The processor is specifically configured to determine the current channel time variation degree in the following manner: Determine the current channel time variation based on the measurement information of the global navigation satellite system and the ephemeris; or, The Doppler spread calculated based on the reference signal is used to determine the current channel time variation degree.

12. The terminal according to any one of claims 7 to 11, characterized in that: The additional DMRS parameter includes the additional DMRS quantity, or the additional DMRS quantity interval.

13. A computer storage medium having a computer program stored thereon, characterized in that: When the program is executed by a processor, the steps of the method according to any one of claims 1 to 6 are implemented.

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