DMRS configuration self-adaption method and device and storage medium

Abstract

The invention discloses a DMRS configuration self-adaption method and device and a storage medium, and the method comprises the steps: judging whether the distance between UE and a base station is a far point or a near point through obtaining the channel quality of an uplink and a downlink of the UE, obtaining a frequency offset value of a UE physical layer to judge the moving speed of the UE, and then according to the position between the UE and the base station and the moving speed of the UE, determining the DMRS configuration self-adaption according to the position between the UE and the base station and the moving speed of the UE. The symbol type and the symbol position of the DMRS are adaptively configured. The present invention can improve the communication performance of the UE. The method can be widely applied to the technical field of 5G communication.

Description

Technical Field

[0001] The present invention relates to the field of 5G communication technologies, and in particular, to a method, apparatus, and storage medium for adapting DMRS configuration. Background Art

[0002] After a user equipment (UE) accesses the configuration of DMRS in a base station system, due to the fact that the position and moving speed of the UE may change at any time, a fixed DMRS demodulation reference signal configuration may lead to inaccurate channel estimation accuracy of the UE and poor radio link performance. Summary of the Invention

[0003] The present invention aims to solve at least one of the technical problems in the related art to some extent. For this purpose, an object of the present invention is to provide a method, apparatus, and storage medium for adapting DMRS configuration, which can adaptively configure the symbol type of DMRS according to the position of the UE from the base station and / or the moving speed of the UE, thereby improving the communication performance of the UE.

[0004] The technical solution adopted by the present invention is as follows: In a first aspect, the present invention provides a method for adapting DMRS configuration. The method includes: obtaining the channel quality of the uplink and downlink of the UE to determine whether the position of the UE from the base station is a near point or a far point; obtaining the physical layer frequency offset value of the UE to determine whether the moving speed of the UE is slow, medium, or fast; if the position of the UE from the base station is a near point and the moving speed of the UE is slow, setting the DMRS configuration to single-symbol preposed DMRS; if the position of the UE from the base station is a far point and the moving speed of the UE is slow, setting the DMRS configuration to single-symbol preposed DMRS + additional DMRS; if the position of the UE from the base station is a near point and the moving speed of the UE is medium, setting the DMRS configuration to double-symbol preposed DMRS; if the position of the UE from the base station is a far point and the moving speed of the UE is medium, setting the DMRS configuration to single-symbol preposed DMRS + additional DMRS; if the position of the UE from the base station is a near point and the moving speed of the UE is high, setting the DMRS configuration to single-symbol preposed DMRS + additional DMRS; if the position of the UE from the base station is a far point and the moving speed of the UE is high, setting the DMRS configuration to double-symbol preposed DMRS + additional DMRS; sending the DMRS configuration to the UE in the form of RRC signaling to enable the UE to switch the DMRS configuration.

[0005] Among them, obtaining the channel quality of the uplink and downlink of the UE to determine whether the position of the UE relative to the base station is close or far includes: obtaining the signal-to-noise ratio of the PUSCH channel in the UE uplink, or the signal-to-noise ratio of the SRS signal; or obtaining the CSI information in the UE downlink and obtaining the cqi value from the CSI information. If the signal-to-noise ratio of the PUSCH channel is higher than a preset first threshold, or the signal-to-noise ratio of the SRS signal is higher than a preset second threshold, or the cqi value is higher than a preset third threshold, it is determined that the position of the UE relative to the base station is a near point; otherwise, it is determined that the position of the UE relative to the base station is a far point.

[0006] Among them, the UE physical layer frequency offset value is the frequency offset value of the UE when sending uplink data. Among them, obtaining the UE physical layer frequency offset value to determine whether the moving speed of the UE is slow, medium or fast includes: if the frequency offset value is less than or equal to a preset fourth threshold, it is determined that the moving speed of the UE is slow; otherwise, if the frequency offset value is greater than or equal to a preset fifth threshold, it is determined that the moving speed of the UE is high; otherwise, if the frequency offset value is greater than the fourth threshold and less than the fifth threshold, it is determined that the moving speed of the UE is medium. In a second aspect, the present invention provides a device for DMRS configuration adaptation. The device includes: a UE position determination module for obtaining the channel quality of the uplink and downlink of the UE to determine whether the position of the UE relative to the base station is a near point or a far point; a UE moving speed determination module for obtaining the UE physical layer frequency offset value to determine whether the moving speed of the UE is slow, medium or fast; a DMRS configuration setting module for setting the DMRS configuration to single-symbol prefixed DMRS if the position of the UE relative to the base station is a near point and the moving speed of the UE is slow; setting the DMRS configuration to single-symbol prefixed DMRS + additional DMRS if the position of the UE relative to the base station is a far point and the moving speed of the UE is slow; setting the DMRS configuration to double-symbol prefixed DMRS if the position of the UE relative to the base station is a near point and the moving speed of the UE is medium; setting the DMRS configuration to single-symbol prefixed DMRS + additional DMRS if the position of the UE relative to the base station is a far point and the moving speed of the UE is medium; setting the DMRS configuration to single-symbol prefixed DMRS + additional DMRS if the position of the UE relative to the base station is a near point and the moving speed of the UE is high; setting the DMRS configuration to double-symbol prefixed DMRS + additional DMRS if the position of the UE relative to the base station is a far point and the moving speed of the UE is high; a DMRS configuration sending module for sending the DMRS configuration to the UE in the form of RRC signaling to enable the UE to switch the DMRS configuration.

[0007] Among them, the UE location determination module includes: a channel quality parameter acquisition unit, configured to acquire the signal-to-noise ratio of the PUSCH channel in the uplink of the UE, or the signal-to-noise ratio of the SRS signal; or acquire CSI information in the downlink of the UE, and obtain a cqi value from the CSI information; a UE location distance determination unit, configured to determine that the location of the UE from the base station is a near point if the signal-to-noise ratio of the PUSCH channel is higher than a preset first threshold, or the signal-to-noise ratio of the SRS signal is higher than a preset second threshold, or the cqi value is higher than a preset third threshold; otherwise, determine that the location of the UE from the base station is a far point.

[0008] In a third aspect, the present invention provides a computer-readable storage medium, where the computer-readable storage medium stores computer-executable instructions for causing a computer of a base station to execute the method as described above.

[0009] The beneficial effects of the present invention are: The present invention determines whether the distance between the UE and the base station is a far point or a near point by acquiring the channel quality of the uplink and downlink of the UE, acquires the physical layer frequency offset value of the UE to determine the moving speed of the UE, and then adaptively configures the symbol type and symbol position of the DMRS according to the position of the UE from the base station and the moving speed of the UE, thereby improving the communication performance of the UE. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 is a schematic flowchart of an embodiment of the method for DMRS configuration adaptation of the present invention; Figure 2 is Figure 1 a schematic flowchart of an embodiment of step S11 of Figure 3 is a schematic structural diagram of an embodiment of the apparatus for DMRS configuration adaptation of the present invention; Figure 4 is Figure 3 a schematic structural diagram of an embodiment of the UE location determination module 11 of DETAILED DESCRIPTION OF THE EMBODIMENTS

[0011] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments may be combined with each other. Embodiment 1

[0012] Please refer to Figure 1 , Figure 1 is a schematic flowchart of an embodiment of the method for DMRS configuration adaptation of the present invention. As Figure 1 shown, the method includes the following steps: S11: Acquire the channel quality of the uplink and downlink of the UE, so as to determine whether the location of the UE from the base station is a near point or a far point; Specifically, please refer to Figure 2 , Figure 2 which Figure 1 is a schematic flow diagram of an embodiment of step S11. As Figure 2 shown, this step S11 includes the following sub-steps: S111: Obtain the signal-to-noise ratio of the PUSCH channel in the uplink of the UE, or the signal-to-noise ratio of the SRS signal; or obtain the CSI information in the downlink of the UE, and obtain the cqi value from this CSI information; S112: If the signal-to-noise ratio of the PUSCH channel is higher than a preset first threshold, or the signal-to-noise ratio of the SRS signal is higher than a preset second threshold, or the cqi value is higher than a preset third threshold, then determine that the position of the UE from the base station is a near point; otherwise, determine that the position of the UE from the base station is a far point.

[0013] S12: Obtain the physical layer frequency offset value of the UE, so as to determine whether the moving speed of the UE is slow, medium or fast; Preferably, the physical layer frequency offset value of the UE is the frequency offset value of the UE sending uplink data. Since the UE is moving at a certain speed, its uplink data signal will generate a Doppler frequency offset. Conversely, according to the frequency offset value of the UE sending uplink data, it can be determined whether the moving speed of the UE is fast or slow.

[0014] Step S12 includes the following judgment steps: If the frequency offset value is less than or equal to a preset fourth threshold, then determine that the moving speed of the UE is slow; otherwise, if the frequency offset value is greater than or equal to a preset fifth threshold, then determine that the moving speed of the UE is high; otherwise, if the frequency offset value is greater than the fourth threshold and less than the fifth threshold, then determine that the moving speed of the UE is medium.

[0015] For example: Set the fourth threshold to 50 and the fifth threshold to 250. If the frequency offset value is less than or equal to 50HZ, then determine that the moving speed of the UE is slow; if the frequency offset value is greater than or equal to 250HZ, then determine that the moving speed of the UE is high; if the frequency offset value is greater than 50 and less than 250, then determine that the moving speed of the UE is medium.

[0016] It should be noted that the execution order of step S11 and step S12 can be exchanged.

[0017] S13: If the position of the UE relative to the base station is a near point and the moving speed of the UE is slow, set the DMRS configuration to single-symbol prefixed DMRS; if the position of the UE relative to the base station is a far point and the moving speed of the UE is slow, set the DMRS configuration to single-symbol prefixed DMRS + additional DMRS; if the position of the UE relative to the base station is a near point and the moving speed of the UE is medium, set the DMRS configuration to double-symbol prefixed DMRS; if the position of the UE relative to the base station is a far point and the moving speed of the UE is medium, set the DMRS configuration to single-symbol prefixed DMRS + additional DMRS; if the position of the UE relative to the base station is a near point and the moving speed of the UE is high, set the DMRS configuration to single-symbol prefixed DMRS + additional DMRS; if the position of the UE relative to the base station is a far point and the moving speed of the UE is high, set the DMRS configuration to double-symbol prefixed DMRS + additional DMRS; S14: Send the DMRS configuration to the UE via RRC signaling to cause the UE to switch the DMRS configuration. Embodiment 2

[0018] Please refer to Figure 3 , Figure 3 which is a schematic structural diagram of an embodiment of the device for adaptive DMRS configuration of the present invention. As Figure 3 shown, the device includes a UE position determination module 11, a UE moving speed determination module 12, a DMRS configuration setting module 13, and a DMRS configuration sending module 14.

[0019] The UE position determination module 11 is used to obtain the channel quality of the uplink and downlink of the UE, so as to determine whether the position of the UE relative to the base station is a near point or a far point. Specifically, please refer to Figure 4 , the UE position determination module 11 includes a channel quality parameter acquisition unit 111 and a UE position near / far determination unit 112. The channel quality parameter acquisition unit 111 is used to obtain the signal-to-noise ratio of the PUSCH channel in the uplink of the UE, or the signal-to-noise ratio of the SRS signal; or obtain the CSI information in the downlink of the UE and obtain the cqi value from the CSI information. The UE position near / far determination unit 112 is used to determine that the position of the UE relative to the base station is a near point if the signal-to-noise ratio of the PUSCH channel is higher than a preset first threshold, or the signal-to-noise ratio of the SRS signal is higher than a preset second threshold, or the cqi value is higher than a preset third threshold; otherwise, determine that the position of the UE relative to the base station is a far point.

[0020] The UE moving speed determination module 12 is used to obtain the physical layer frequency offset value of the UE, so as to determine whether the moving speed of the UE is slow, medium, or fast.

[0021] The DMRS configuration setting module 13 is used to set the DMRS configuration to single-symbol preposed DMRS if the position of the UE relative to the base station is a near point and the moving speed of the UE is slow; to set the DMRS configuration to single-symbol preposed DMRS + additional DMRS if the position of the UE relative to the base station is a far point and the moving speed of the UE is slow; to set the DMRS configuration to double-symbol preposed DMRS if the position of the UE relative to the base station is a near point and the moving speed of the UE is medium; to set the DMRS configuration to single-symbol preposed DMRS + additional DMRS if the position of the UE relative to the base station is a far point and the moving speed of the UE is medium; to set the DMRS configuration to single-symbol preposed DMRS + additional DMRS if the position of the UE relative to the base station is a near point and the moving speed of the UE is high; to set the DMRS configuration to double-symbol preposed DMRS + additional DMRS if the position of the UE relative to the base station is a far point and the moving speed of the UE is high; The DMRS configuration sending module 14 is used to send the DMRS configuration to the UE by means of RRC signaling, so that the UE switches the DMRS configuration.

[0022] It should be noted that the execution order of the UE position judgment module 11 and the UE moving speed judgment module 12 can be exchanged. Specifically, for the working methods of each module in this embodiment, please refer to Embodiment 1, which will not be elaborated here. Embodiment 3

[0023] The present invention also provides a computer-readable storage medium, which stores computer-executable instructions for causing a computer of a base station to execute the method described in Embodiment 1.

[0024] The above is a specific description of the preferred embodiments of the present invention, but the present invention is not limited to the described embodiments. Those skilled in the art can make various equivalent deformations or substitutions without departing from the spirit of the present invention, and these equivalent deformations or substitutions are all included in the scope defined by the claims of this application.

Claims

1. A method for DMRS configuration adaptation, characterized in that including: Obtain the channel quality of the uplink and downlink of the UE, so as to determine whether the position of the UE from the base station is a near point or a far point; Obtain the physical layer frequency offset value of the UE, so as to determine whether the moving speed of the UE is slow, medium or fast; If the position of the UE from the base station is a near point and the moving speed of the UE is slow, then set the DMRS configuration to single-symbol prefixed DMRS; If the position of the UE from the base station is a far point and the moving speed of the UE is slow, then set the DMRS configuration to single-symbol prefixed DMRS + additional DMRS; if the position of the UE from the base station is a near point and the moving speed of the UE is medium, then set the DMRS configuration to double-symbol prefixed DMRS; if the position of the UE from the base station is a far point and the moving speed of the UE is medium, then set the DMRS configuration to single-symbol prefixed DMRS + additional DMRS; if the position of the UE from the base station is a near point and the moving speed of the UE is high, then set the DMRS configuration to single-symbol prefixed DMRS + additional DMRS; if the position of the UE from the base station is a far point and the moving speed of the UE is high, then set the DMRS configuration to double-symbol prefixed DMRS + additional DMRS; Send the DMRS configuration to the UE by means of RRC signaling, so that the UE switches the DMRS configuration.

2. The method according to claim 1, wherein The obtaining the channel quality of the uplink and downlink of the UE, so as to determine whether the position of the UE from the base station is near or far, includes: Obtain the signal-to-noise ratio of the PUSCH channel in the uplink of the UE, or the signal-to-noise ratio of the SRS signal; or obtain the CSI information in the downlink of the UE, and obtain the cqi value from the CSI information; If the signal-to-noise ratio of the PUSCH channel is higher than a preset first threshold, or the signal-to-noise ratio of the SRS signal is higher than a preset second threshold, or the cqi value is higher than a preset third threshold, then determine that the position of the UE from the base station is a near point; otherwise, determine that the position of the UE from the base station is a far point.

3. The method according to claim 1, wherein The physical layer frequency offset value of the UE is the frequency offset value of the UE sending uplink data; Among them, the obtaining the physical layer frequency offset value of the UE, so as to determine whether the moving speed of the UE is slow, medium or fast, includes: If the frequency offset value is less than or equal to a preset fourth threshold, then determine that the moving speed of the UE is slow; otherwise, If the frequency offset value is greater than or equal to a preset fifth threshold, then determine that the moving speed of the UE is high; otherwise, If the frequency offset value is greater than the fourth threshold and less than the fifth threshold, then determine that the moving speed of the UE is medium.

4. A device for adapting DMRS configuration, characterized in that including: A UE position judgment module, configured to obtain the channel quality of the uplink and downlink of the UE, so as to determine whether the position of the UE from the base station is a near point or a far point; A UE moving speed judgment module, configured to obtain the physical layer frequency offset value of the UE, so as to determine whether the moving speed of the UE is slow, medium or fast; The DMRS configuration setting module is used to set the DMRS configuration to single-symbol preposed DMRS if the position of the UE from the base station is a near point and the moving speed of the UE is slow. If the position of the UE from the base station is a far point and the moving speed of the UE is slow, set the DMRS configuration to single-symbol preposed DMRS + additional DMRS; if the position of the UE from the base station is a near point and the moving speed of the UE is medium, set the DMRS configuration to double-symbol preposed DMRS; if the position of the UE from the base station is a far point and the moving speed of the UE is medium, set the DMRS configuration to single-symbol preposed DMRS + additional DMRS; if the position of the UE from the base station is a near point and the moving speed of the UE is high, set the DMRS configuration to single-symbol preposed DMRS + additional DMRS; if the position of the UE from the base station is a far point and the moving speed of the UE is high, set the DMRS configuration to double-symbol preposed DMRS + additional DMRS. The DMRS configuration sending module is used to send the DMRS configuration to the UE in the form of RRC signaling, so that the UE switches the DMRS configuration.

5. The device according to claim 4, characterized in that, The UE position determination module includes: The channel quality parameter acquisition unit is used to acquire the signal-to-noise ratio of the PUSCH channel in the uplink of the UE, or the signal-to-noise ratio of the SRS signal; or acquire the CSI information in the downlink of the UE and obtain the cqi value from the CSI information. The UE position determination unit is used to determine that the position of the UE from the base station is a near point if the signal-to-noise ratio of the PUSCH channel is higher than a preset first threshold, or the signal-to-noise ratio of the SRS signal is higher than a preset second threshold, or the cqi value is higher than a preset third threshold; otherwise, determine that the position of the UE from the base station is a far point.

6. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer-executable instructions, and the computer-executable instructions are used to cause the computer of the base station to execute the method according to any one of claims 1 to 3.

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