CN112491523A - Demodulation reference signal scheduling method and device, electronic equipment and storage medium - Google Patents

Demodulation reference signal scheduling method and device, electronic equipment and storage medium Download PDF

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CN112491523A
CN112491523A CN202011297272.4A CN202011297272A CN112491523A CN 112491523 A CN112491523 A CN 112491523A CN 202011297272 A CN202011297272 A CN 202011297272A CN 112491523 A CN112491523 A CN 112491523A
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CN112491523B (en
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唐兵
武传国
谭定富
是元吉
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Shanghai Qingkun Information Technology Co Ltd
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Abstract

The invention provides a demodulation reference signal scheduling method and device, electronic equipment and a storage medium, wherein the demodulation reference signal scheduling method comprises the following steps: acquiring speed estimation of a user, signal-to-noise ratio estimation of a data channel and first scheduling information; determining the number of initial DMRS symbols according to the speed estimation of a user; determining a DMRS configuration mode according to the number of the initial DMRS symbols; dynamically adjusting the number of the initial DMRS symbols according to the DMRS configuration mode and the first scheduling information to obtain the final number of the DMRS symbols; and scheduling the demodulation reference signals of the corresponding data channels for the users according to the DMRS configuration mode and the final DMRS symbol number. The invention can adaptively select the proper DMRS configuration mode and the number of DMRS symbols, and improve the spectrum efficiency and the overall performance of the system.

Description

Demodulation reference signal scheduling method and device, electronic equipment and storage medium
Technical Field
The present invention relates to the field of wireless communications, and in particular, to a demodulation reference signal scheduling method and apparatus, an electronic device, and a storage medium.
Background
DMRS (Demodulation Reference Signal) is a Reference Signal used for uplink and downlink data Demodulation. DMRS related information of a PDSCH (Physical Downlink Shared Channel) or a PUSCH (Physical Uplink Shared Channel) is uniformly scheduled by a base station and transmitted to a User Equipment (UE) through Uplink and Downlink scheduling information.
DMRS design in a 5GNR (New Radio, New air interface) system adopts a combination mode of a preamble DMRS symbol and an additional DMRS symbol.
In order to reduce demodulation and decoding time delay, a front DMRS symbol is designed in a 5G NR system, and the idea is as follows: within each scheduling time unit, the position where the DMRS symbol first appears should be as close as possible to the starting point of scheduling.
Taking the DMRS of the PDSCH as an example, the time domain mapping mode of the preamble DMRS symbol depends on the mapping mode of the PDSCH, and the latter is classified into TypeA and TypeB:
PDSCH mapping type a (slot based scheduling): the location of the preamble DMRS symbol should be immediately after the PDCCH region, so the location of the preamble DMRS symbol depends on the configuration of the PDCCH. If the PDCCH occupies 2 OFDM symbols, the DMRS starts from the third symbol; if the PDCCH occupies 3 symbols, the DMRS starts from the fourth symbol.
PDSCH mapping type b (non-slot based scheduling): the preamble DMRS symbol is transmitted from the first symbol of the scheduling region.
For a low mobility scenario, only setting the preamble DMRS symbol can obtain channel estimation performance meeting demodulation requirements with low overhead. However, in medium-high speed scenarios, in addition to the preamble DMRS symbol, more DMRS symbols need to be inserted within the scheduling duration to meet the estimation accuracy of the channel time-variability.
Aiming at the problem, a DMRS symbol structure combining a preamble DMRS symbol and an additional DMRS symbol with configurable time domain density is adopted in a 5G NR system. Each group of additional DMRS symbols is repetition of a preamble DMRS symbol, that is, each group of additional DMRS symbols and the preamble DMRS symbol occupy the same subcarrier and the same OFDM symbol number.
DMRSs of PDSCH are divided into two configurations, i.e., single-symbol configuration and dual-symbol configuration. The single symbol configuration indicates that 1 OFDM (Orthogonal Frequency-Division Multiplexing) symbol is mapped to a DRMS symbol, and the dual symbol configuration indicates that 2 consecutive OFDM symbols are mapped to DMRS symbols.
In a single symbol configuration, up to 3 additional sets of DMRS symbols may be added; in a two-symbol configuration, at most, a set of additional DMRS symbols may be added.
In the 5G NR system, DMRS time domain mapping of the PUSCH is substantially consistent with the PDSCH, and is not described herein again.
To summarize, DMRS time domain mapping for shared channels of 5G NR system, as shown in table 1:
TABLE 1
Figure BDA0002785759790000021
Generally, a DMRS time domain mapping algorithm for a base station to schedule a shared channel mainly considers mobility of a UE. The basic principle is as follows: only the front DMRS symbols are configured in the low-speed scene, the additional DMRS symbols are configured in the medium-high speed scene, and the more the additional DMRS symbols are configured at higher speed. The scheduling method can ensure the channel estimation performance of the shared channel demodulation, but is not optimal for the spectrum efficiency and the overall performance of the system.
Disclosure of Invention
One of the objectives of the present invention is to provide a demodulation reference signal scheduling method and apparatus, an electronic device, and a storage medium, so as to overcome the disadvantages in the prior art.
The technical scheme provided by the invention is as follows:
a demodulation reference signal scheduling method comprises the following steps: acquiring speed estimation of a user, signal-to-noise ratio estimation of a data channel and first scheduling information; the first scheduling information comprises at least one of a modulation and coding mode, a service quality grade and a scheduling bandwidth; determining the number of initial DMRS symbols according to the speed estimation of the user; determining a DMRS configuration mode according to the initial DMRS symbol number; the DMRS configuration mode comprises a single symbol configuration and a dual symbol configuration; dynamically adjusting the initial DMRS symbol number according to the DMRS configuration mode and the first scheduling information to obtain a final DMRS symbol number; and scheduling the demodulation reference signals of the corresponding data channels for the users according to the DMRS configuration mode and the final DMRS symbol number.
Further, the determining the DMRS configuration pattern according to the initial DMRS symbol number includes: and if the initial DMRS symbols are even numbers and the signal-to-noise ratio estimation is smaller than a first signal-to-noise ratio threshold, determining that the DMRS configuration mode is dual-symbol configuration.
Further, the dynamically adjusting the initial DMRS symbol number according to the DMRS configuration pattern and the first scheduling information to obtain a final DMRS symbol number includes: the first scheduling information comprises a modulation coding mode; and if the DMRS configuration mode is single symbol configuration and the initial DMRS symbol number is greater than the first symbol number, judging whether the number of the DMRS symbols needs to be reduced according to the modulation coding mode and the signal-to-noise ratio estimation.
Further, the determining whether the number of DMRS symbols needs to be reduced according to the modulation and coding scheme and the snr estimation includes: if the modulation coding mode is smaller than a preset modulation threshold and the signal-to-noise ratio estimation is larger than a second signal-to-noise ratio threshold, reducing the number of the initial DMRS symbols to obtain the number of final DMRS symbols; the second signal-to-noise ratio threshold is greater than the first signal-to-noise ratio threshold.
Further, the dynamically adjusting the initial DMRS symbol number according to the DMRS configuration pattern and the first scheduling information to obtain a final DMRS symbol number further includes: the first scheduling information comprises a service quality grade and a scheduling bandwidth; if the DMRS configuration mode is single symbol configuration and the initial DMRS symbol number is less than a second symbol number, judging whether the number of the DMRS symbols needs to be increased or not according to the service quality level and the scheduling bandwidth; the second number of symbols is greater than the first number of symbols.
Further, the determining whether the number of DMRS symbols needs to be increased according to the service quality level and the scheduling bandwidth includes: and if the service quality grade is greater than a preset service quality threshold and the scheduling bandwidth is less than a preset bandwidth threshold, increasing the number of the initial DMRS symbols to obtain the number of the final DMRS symbols.
The present invention also provides a demodulation reference signal scheduling apparatus, including: the information acquisition module is used for acquiring the speed estimation of a user, the signal-to-noise ratio estimation of a data channel and first scheduling information; the first scheduling information comprises at least one of a modulation and coding mode, a service quality grade and a scheduling bandwidth; an initial number determination module, configured to determine, according to the speed estimation of the user, an initial DMRS symbol number; a configuration mode determining module, configured to determine a DMRS configuration mode according to the initial DMRS symbol number; the DMRS configuration mode comprises a single symbol configuration and a dual symbol configuration; a target number determination module, configured to dynamically adjust the number of the initial DMRS symbols according to the DMRS configuration pattern and the first scheduling information, to obtain a final number of DMRS symbols; and the symbol scheduling module is used for scheduling the demodulation reference signals of the corresponding data channels for the users according to the DMRS configuration mode and the final DMRS symbol quantity.
Further, the configuration mode determining module is further configured to determine that the DMRS configuration mode is a dual-symbol configuration if the initial DMRS symbol number is an even number and the snr estimation is smaller than a first snr threshold.
The present invention also provides an electronic device comprising: a memory for storing a computer program; a processor configured to implement the demodulation reference signal scheduling method according to any one of the preceding claims when the computer program is executed.
The present invention also provides a computer readable storage medium having stored thereon a computer program which, when being executed by a processor, carries out the steps of the demodulation reference signal scheduling method as set forth above.
The demodulation reference signal scheduling method and device, the electronic device and the storage medium provided by the invention can at least bring the following beneficial effects: according to the speed estimation of the user, the signal-to-noise ratio estimation of the data channel and the first scheduling information, the proper DMRS configuration mode and the number of DMRS symbols are selected in a self-adaptive mode, and the spectrum efficiency and the overall performance of the system can be improved.
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The above features, technical features, advantages and implementations of a demodulation reference signal scheduling method and apparatus, an electronic device, and a storage medium will be further described in the following detailed description of preferred embodiments with reference to the accompanying drawings.
Fig. 1 is a flow chart of an embodiment of a demodulation reference signal scheduling method of the present invention;
fig. 2 is a schematic structural diagram of an embodiment of a demodulation reference signal scheduling apparatus according to the present invention;
fig. 3 is a schematic structural diagram of an embodiment of an electronic device of the present invention.
The reference numbers illustrate:
100. an information acquisition module, 200, an initial number determination module, 300, a configuration mode determination module, 400, a target number determination module, 500, a symbol scheduling module, 20, an electronic device, 30, a memory, 40, a processor, 50, a computer program.
Detailed Description
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following description will be made with reference to the accompanying drawings. It is obvious that the drawings in the following description are only some examples of the invention, and that for a person skilled in the art, other drawings and embodiments can be derived from them without inventive effort.
For the sake of simplicity, the drawings only schematically show the parts relevant to the present invention, and they do not represent the actual structure as a product. In addition, in order to make the drawings concise and understandable, components having the same structure or function in some of the drawings are only schematically depicted, or only one of them is labeled. In this document, "one" means not only "only one" but also a case of "more than one".
An embodiment of the present invention, as shown in fig. 1, is a demodulation reference signal scheduling method, including:
step S100 obtains a speed estimate of a user, a signal-to-noise ratio estimate of a data channel, and first scheduling information.
Specifically, the speed estimate of the UE and the Signal-to-noise ratio estimate (i.e., SNR) of the data channel for data transmission of the UE may be obtained according to various reference signals for assisting data transmission, such as PUSCH DMRS, PUCCH (physical uplink control channel) DMRS, SRS (Sounding reference Signal), and PT-RS (Phase-tracking reference Signal) in 5G NR.
The first scheduling information includes at least one of a modulation and coding scheme, a quality of service class, and a scheduling bandwidth. The first scheduling information may be obtained according to an upper layer message.
Step S200 determines the number of initial DMRS symbols according to the velocity estimation of the user.
The number of DMRS symbols refers to the total number of DMRS symbols to be used in one scheduling. In 5G NR, the number of DMRS symbols is equal to the total number of DMRS symbols determined by a preamble DMRS symbol and an additional DMRS symbol to be used in one-time scheduling, and is also equal to the number of OFDM symbols to be mapped to DMRS symbols.
For example, the speed of the user is divided into several mobile scenarios in advance, such as low/medium/high mobility, and different mobile scenarios correspond to different numbers of DMRS symbols. The higher the mobile speed, the larger the number of DMRS symbols required.
And judging which interval the speed estimation of the user falls in, obtaining the DMRS symbol number corresponding to the corresponding interval, and taking the DMRS symbol number as the initial DMRS symbol number.
For example, a first speed decision threshold, a second speed decision threshold and a third speed decision threshold are set, and if the user speed is not greater than the first speed decision threshold, the number of DMRS symbols is set to 1; if the user speed is greater than a first speed judgment threshold value and not greater than a second speed judgment threshold value, setting the number of DMRS symbols to be 2; if the user speed is greater than the second speed judgment threshold and not greater than the third speed judgment threshold, setting the number of DMRS symbols to be 3; and if the user speed is greater than the third speed judgment threshold, setting the number of DMRS symbols to be 4.
The number of DMRS symbols affects the quality of the channel estimation, the probability of correct demodulation. More DMRS symbols may improve channel estimation quality and improve the probability of correct demodulation. But excessive DMRS symbols consume excessive power/time/frequency resources, limiting the use of other data or symbols; too few DMRS symbols will reduce the probability of correct demodulation, so it is necessary to dynamically adjust the number of initial DMRS symbols according to actual conditions to obtain the number of DMRS symbols that meets the required performance requirements.
Step S300 determines a DMRS configuration mode according to the initial DMRS symbol number.
Specifically, there are two DMRS configuration modes, namely, single symbol configuration and dual symbol configuration.
And if the initial DMRS symbol number is an odd number, determining that the DMRS configuration mode is single symbol configuration. If the number of the initial DMRS symbols is an even number, theoretically, single symbol configuration or double symbol configuration can be adopted; the DMRS configuration pattern may be further accurately determined from the signal-to-noise ratio estimate.
Preferably, if the initial DMRS symbol number is even and the snr estimation is smaller than the first snr threshold, determining that the DMRS configuration mode is dual-symbol configuration; otherwise, the configuration is a single symbol configuration.
Step S400 is to dynamically adjust the number of the initial DMRS symbols according to the DMRS configuration mode and the first scheduling information to obtain the final number of the DMRS symbols.
Optionally, if the DMRS configuration mode is a two-symbol configuration, the initial DMRS symbol number is used as the final DMRS symbol number. And if the DMRS configuration mode is single symbol configuration, dynamically adjusting the number of the initial DMRS symbols according to the first scheduling information, and taking the adjusted result as the final DMRS symbol number.
Optionally, the first scheduling information includes a modulation and coding scheme; and if the DMRS configuration mode is single symbol configuration and the initial DMRS symbol number is greater than the first symbol number, judging whether the number of the DMRS symbols needs to be reduced according to a modulation coding mode and signal-to-noise ratio estimation. The first symbol number is not less than 1. For example, the first symbol number is 1.
If the modulation coding mode is smaller than a preset modulation threshold and the signal-to-noise ratio estimation is larger than a second signal-to-noise ratio threshold, reducing the number of the initial DMRS symbols to obtain the number of the final DMRS symbols; the second signal-to-noise ratio threshold is greater than the first signal-to-noise ratio threshold. For example, the initial number of DMRS symbols is reduced by one to obtain the final number of DMRS symbols.
For example, when a user is in a high-speed scene, the number of initial DMRS symbols obtained according to the speed estimation of the user is 3. However, under high SNR and low mcs (modulation and Coding scheme) scheduling, even in a high-speed scenario, 3 additional DMRS symbols are not required, and the number of DMRS symbols can be appropriately reduced.
Optionally, the first scheduling information includes a service quality level and a scheduling bandwidth; if the DMRS configuration mode is single symbol configuration and the initial DMRS symbol number is less than the second symbol number, judging whether the number of the DMRS symbols needs to be increased according to the service quality level and the scheduling bandwidth; the second number of symbols is greater than the first number of symbols.
And if the service quality grade is greater than a preset service quality threshold and the scheduling bandwidth is less than a preset bandwidth threshold, increasing the number of the initial DMRS symbols to obtain the number of the final DMRS symbols. For example, the initial DMRS symbol number is increased by one to obtain a final DMRS symbol number.
For example, in 5G NR, when a scheduling bandwidth is small for a Service with a high QoS (Quality of Service) level, additional DMRS symbols may be added to ensure the reception performance of the UE.
Step S500, according to the DMRS configuration mode and the final DMRS symbol number, the demodulation reference signal of the corresponding data channel is scheduled for the user.
For example, in 5G NR, the number of pre-DMRS symbols and the number of additional DMRS symbols are determined according to the DMRS configuration pattern and the final DMRS symbol number; and then carrying out DMRS scheduling according to the DMRS configuration mode, the number of the preposed DMRS symbols and the number of the additional DMRS symbols.
In this embodiment, according to the speed estimation of the user, the snr estimation of the data channel, and the first scheduling information, the appropriate DMRS configuration pattern and the number of DMRS symbols are adaptively selected, which may improve the spectrum efficiency and the overall performance of the system.
An embodiment of the present invention, as shown in fig. 2, is a demodulation reference signal scheduling apparatus, including:
the information obtaining module 100 is configured to obtain a speed estimate of a user, a signal-to-noise ratio estimate of a data channel, and first scheduling information.
Specifically, the speed estimate of the UE and the Signal-to-noise ratio estimate (i.e., SNR) of the data channel for data transmission of the UE may be obtained according to various reference signals for assisting data transmission, such as PUSCH DMRS, PUCCH (physical uplink control channel) DMRS, SRS (Sounding reference Signal), and PT-RS (Phase-tracking reference Signal) in 5G NR.
The first scheduling information includes at least one of a modulation and coding scheme, a quality of service class, and a scheduling bandwidth. The first scheduling information may be obtained according to an upper layer message.
An initial number determining module 200, configured to determine an initial DMRS symbol number according to a speed estimation of a user.
The number of DMRS symbols refers to the total number of DMRS symbols to be used in one scheduling. In 5G NR, the number of DMRS symbols is equal to the total number of DMRS symbols determined by a preamble DMRS symbol and an additional DMRS symbol to be used in one-time scheduling, and is also equal to the number of OFDM symbols to be mapped to DMRS symbols.
For example, the speed of the user is divided into several mobile scenarios in advance, such as low/medium/high mobility, and different mobile scenarios correspond to different numbers of DMRS symbols. The higher the mobile speed, the larger the number of DMRS symbols required.
And judging which interval the speed estimation of the user falls in, obtaining the DMRS symbol number corresponding to the corresponding interval, and taking the DMRS symbol number as the initial DMRS symbol number.
For example, a first speed decision threshold, a second speed decision threshold and a third speed decision threshold are set, and if the user speed is not greater than the first speed decision threshold, the number of DMRS symbols is set to 1; if the user speed is greater than a first speed judgment threshold value and not greater than a second speed judgment threshold value, setting the number of DMRS symbols to be 2; if the user speed is greater than the second speed judgment threshold and not greater than the third speed judgment threshold, setting the number of DMRS symbols to be 3; and if the user speed is greater than the third speed judgment threshold, setting the number of DMRS symbols to be 4.
The number of DMRS symbols affects the quality of the channel estimation, the probability of correct demodulation. More DMRS symbols may improve channel estimation quality and improve the probability of correct demodulation. But excessive DMRS symbols consume excessive power/time/frequency resources, limiting the use of other data or symbols; too few DMRS symbols will reduce the probability of correct demodulation, so it is necessary to dynamically adjust the number of initial DMRS symbols according to actual conditions to obtain the number of DMRS symbols that meets the required performance requirements.
A configuration mode determining module 300, configured to determine a DMRS configuration mode according to the initial DMRS symbol number; the DMRS configuration pattern includes a single symbol configuration and a dual symbol configuration.
Specifically, if the initial DMRS symbol number is odd, it is determined that the DMRS configuration pattern is a single symbol configuration. If the number of the initial DMRS symbols is an even number, theoretically, single symbol configuration or double symbol configuration can be adopted; the DMRS configuration pattern may be further accurately determined from the signal-to-noise ratio estimate.
Preferably, if the initial DMRS symbol number is even and the snr estimation is smaller than the first snr threshold, determining that the DMRS configuration mode is dual-symbol configuration; otherwise, the configuration is a single symbol configuration.
And a target number determining module 400, configured to dynamically adjust the initial DMRS symbol number according to the DMRS configuration pattern and the first scheduling information, to obtain a final DMRS symbol number.
Optionally, if the DMRS configuration mode is a two-symbol configuration, the initial DMRS symbol number is used as the final DMRS symbol number. And if the DMRS configuration mode is single symbol configuration, dynamically adjusting the number of the initial DMRS symbols according to the first scheduling information, and taking the adjusted result as the final DMRS symbol number.
Optionally, the first scheduling information includes a modulation and coding scheme; and if the DMRS configuration mode is single symbol configuration and the initial DMRS symbol number is greater than the first symbol number, judging whether the number of the DMRS symbols needs to be reduced according to a modulation coding mode and signal-to-noise ratio estimation. The first symbol number is not less than 1. For example, the first symbol number is 1.
If the modulation coding mode is smaller than a preset modulation threshold and the signal-to-noise ratio estimation is larger than a second signal-to-noise ratio threshold, reducing the number of the initial DMRS symbols to obtain the number of the final DMRS symbols; the second signal-to-noise ratio threshold is greater than the first signal-to-noise ratio threshold. For example, the initial number of DMRS symbols is reduced by one to obtain the final number of DMRS symbols.
For example, when a user is in a high-speed scene, the number of initial DMRS symbols obtained according to the speed estimation of the user is 3. However, under high SNR and low mcs (modulation and Coding scheme) scheduling, even in a high-speed scenario, 3 additional DMRS symbols are not required, and the number of DMRS symbols can be appropriately reduced.
Optionally, the first scheduling information includes a service quality level and a scheduling bandwidth; if the DMRS configuration mode is single symbol configuration and the initial DMRS symbol number is less than the second symbol number, judging whether the number of the DMRS symbols needs to be increased according to the service quality level and the scheduling bandwidth; the second number of symbols is greater than the first number of symbols.
And if the service quality grade is greater than a preset service quality threshold and the scheduling bandwidth is less than a preset bandwidth threshold, increasing the number of the initial DMRS symbols to obtain the number of the final DMRS symbols. For example, the initial DMRS symbol number is increased by one to obtain a final DMRS symbol number.
For example, in 5G NR, when a scheduling bandwidth is small for a Service with a high QoS (Quality of Service) level, additional DMRS symbols may be added to ensure the reception performance of the UE.
And a symbol scheduling module 500, configured to perform scheduling on the demodulation reference signal of the corresponding data channel for the user according to the DMRS configuration pattern and the final DMRS symbol number.
For example, in 5G NR, the number of pre-DMRS symbols and the number of additional DMRS symbols are determined according to the DMRS configuration pattern and the final DMRS symbol number; and then carrying out DMRS scheduling according to the DMRS configuration mode, the number of the preposed DMRS symbols and the number of the additional DMRS symbols.
In this embodiment, according to the speed estimation of the user, the snr estimation of the data channel, and the first scheduling information, the appropriate DMRS configuration pattern and the number of DMRS symbols are adaptively selected, which may improve the spectrum efficiency and the overall performance of the system.
It should be noted that the embodiment of the demodulation reference signal scheduling apparatus according to the present invention and the embodiment of the demodulation reference signal scheduling method according to the foregoing embodiments are based on the same inventive concept, and can achieve the same technical effects. Therefore, other specific contents of the embodiment of the demodulation reference signal scheduling apparatus can refer to the description of the above-mentioned embodiment of the demodulation reference signal scheduling method.
The invention also provides a concrete implementation scene example, and the demodulation reference signal scheduling method and the demodulation reference signal scheduling device provided by the invention are applied to a 5G NR system. The method comprises the following specific steps:
step 1) the base station obtains the speed estimation v of the UE and the signal-to-noise ratio estimation SNR of the shared channel according to the relevant reference signals sent by the UE, such as PUSCH DMRS/PUCCH DMRS/SRS/PT-RS.
And step 2) obtaining first scheduling information from an upper layer message, wherein the first scheduling information comprises a Modulation Coding Scheme (MCS), a service quality level (QoS) (the value is 1, 2 and 3 …, and the larger the value is, the higher the quality level is), and a scheduling bandwidth (B).
The scheduling bandwidth refers to the bandwidth allocated to the UE by the current scheduling.
Step 3) determining the number N of initial DMRS symbols according to the velocity estimation v of the UEinit：
Figure BDA0002785759790000121
Where Thr1_ V, Thr2_ V, Thr3_ V denotes a first speed decision threshold, a second speed decision threshold, and a third speed decision threshold, respectively, and Thr1_ V < Thr2_ V < Thr3_ V.
And step 4) determining a DMRS configuration mode.
There are two DMRS configuration modes, namely single symbol configuration and dual symbol configuration.
If N is presentinitAnd if the number is odd, the DMRS configuration mode is determined to be single symbol configuration.
If N is presentinitIs an even number, e.g. Ninit2 or NinitIn theory, a single-symbol configuration or a two-symbol configuration may be used.
Preferably, the DMRS configuration pattern is determined according to SNR. The specific judgment method comprises the following steps:
Figure BDA0002785759790000122
where Thr1_ SNR is the first signal-to-noise ratio threshold.
Step 5), if the DMRS scene is a dual-symbol DMRS scene, the final DMRS symbol number N is: N-Ninit。
Step 6) if the scene is a single symbol DMRS scene and N isinitIf the DMRS symbol reduction condition is satisfied, the judgment is made whether the DMRS symbol reduction condition is satisfied, namely whether the DMRS symbol reduction condition is satisfied at the same time:
Figure BDA0002785759790000131
if the condition is satisfied, the final DMRS symbol number N is Ninit-1, otherwise go to step 7, where Thr _ MCS represents the preset modulation threshold, Thr2_ SNR represents the second signal-to-noise ratio threshold, and Thr2_ SNR > Thr1_ SNR.
Step 7) if the scene is a single symbol DMRS scene and N isinitIf the number is less than 4, further judging whether the condition of adding DMRS symbols is met, namely whether the following conditions are met simultaneously:
Figure BDA0002785759790000132
if the condition is satisfied, the final DMRS symbol number N is Ninit+1, otherwise N ═ NinitWherein Thr _ Qos represents a preset QoS gateAnd Thr _ B represents a preset bandwidth threshold.
And step 8) determining the number of the preposed DMRS symbols and the number of the additional DMRS symbols according to the DMRS configuration mode and the final DMRS symbol number. And carrying out DMRS scheduling according to the DMRS configuration mode, the number of the preposed DMRS symbols and the number of the additional DMRS symbols.
Assuming 5G NR system scheduling PDCSH DMRS, the correlation threshold is configured as:
Thr1_V＝5Km/h
Thr2_V＝40Km/h
Thr3_V＝120Km/h
Thr1_SNR＝10dB
Thr2_SNR＝20dB
Thr_MCS＝10
Thr_QoS＝2
Thr_B＝2RB
example 1
The current speed estimation v of the UE is 3Km/h, the SNR estimation SNR is 12dB, the modulation and coding scheme MCS is 5, the QoS level QoS is 1, and the scheduling bandwidth B is 10 RB.
First, according to the above steps 1), 2), 3), N can be obtained from the velocity estimate vinit＝1；
Then, due to NinitDetermining that the DMRS configuration mode is single symbol configuration if the DMRS configuration mode is an odd number;
then, NinitIf the condition is not met, skipping step 5);
then, NinitIf the condition is not satisfied, skipping step 6);
then, NinitIf the condition is met, entering the step 7), but the Qos and the B do not meet the condition of increasing the DMRS symbols;
finally, the final DMRS symbol number N ═ Ninit1, i.e., only 1 OFDM symbol is mapped to a DMRS symbol.
From N and table 1, it can be seen that in a single symbol configuration, there are 1 pre-DMRS symbol and 0 additional DMRS symbol. PDCSH DMRS are scheduled with a single symbol configuration and 1 preamble DMRS symbol.
Example two
The current speed estimation v of the UE is 30Km/h, the SNR estimation SNR is 8dB, the modulation and coding scheme MCS is 5, the QoS level of the service is 1, and the scheduling bandwidth B is 10 RB.
First, according to the above steps 1), 2), 3), N can be obtained from the velocity estimate vinit＝2；
Then, due to NinitFor even numbers, estimating SNR from the signal-to-noise ratio can use a two-symbol configuration;
then, go to step 5), obtain the final DMRS symbol number N ═ Ninit2, i.e., 2 OFDM symbols are mapped to DMRS symbols.
From N and table 1, it can be seen that in the two-symbol configuration, there are 1 pre-DMRS symbol and 0 additional DMRS symbol. PDCSH DMRS is scheduled with a two-symbol configuration and 1 preamble DMRS symbol.
Example three
The current speed estimation v of the UE is 30Km/h, the SNR estimation SNR is 25dB, the modulation and coding scheme MCS is 5, the QoS level QoS is 1, and the scheduling bandwidth B is 10 RB.
First, according to the above steps 1), 2), 3), N can be obtained from the velocity estimate vinit＝2；
Then, due to NinitThe DMRS configuration mode is determined to be single symbol configuration when the number is even and the SNR is greater than Thr1_ SNR;
then, step 5) is skipped;
then, NinitThe condition is satisfied, step 6) is carried out, the modulation coding mode MCS and the signal-to-noise ratio estimation SNR satisfy the condition of reducing DMRS symbols, and N is updatedinit＝2-1＝1；
Finally, step 7) is skipped, resulting in N ═ Ninit1, i.e., 1 OFDM symbol is mapped to a DMRS symbol.
From N and table 1, it can be seen that in a single symbol configuration, there are 1 pre-DMRS symbol and 0 additional DMRS symbol. PDCSH DMRS are scheduled with a single symbol configuration and 1 preamble DMRS symbol.
One embodiment of the invention, as shown in FIG. 3, a computer device 20 includes a memory 30, a processor 40; a memory 30 for storing a computer program 50; a processor 40 for implementing the demodulation reference signal scheduling method of any of the foregoing embodiments when executing the computer program 50.
As an example, the processor 40 realizes the steps S100 to S500 according to the foregoing description when executing the computer program. The processor 40 implements the functions of the modules and units in the demodulation reference signal scheduling apparatus described above when executing the computer program. As yet another example, the processor 40 executes the functions of the information acquisition module 100, the initial number determination module 200, the configuration mode determination module 300, the target number determination module 400, and the symbol scheduling module 500 when executing the computer program.
Alternatively, the computer program may be divided into one or more modules/units according to the particular needs to accomplish the invention. Each module/unit may be a series of computer program instruction segments capable of performing a particular function. The computer program instruction segment is used for describing the execution process of the computer program in the demodulation reference signal scheduling device. As an example, the computer program may be divided into various modules/units in the virtual device, such as the information acquisition module 100, the initial number determination module 200, the configuration mode determination module 300, the target number determination module 400, and the symbol scheduling module 500.
The processor 40 may be a Central Processing Unit (CPU), Graphics Processing Unit (GPU), Digital Signal Processor (DSP), Application Specific Integrated Circuit (ASIC), Field Programmable Gate Array (FPGA), general purpose processor or other logic device, etc., as desired.
The memory 30 may be any internal storage unit and/or external storage device capable of implementing data, program storage. For example, the memory 30 may be a hard disk, a smart card (SMC), a Secure Digital (SD) card, a flash memory card, or the like. The memory 30 is used to store computer programs, other programs of the demodulation reference signal scheduling apparatus, and data.
The computer device 20 may also include input and output devices, display devices, network access devices, buses, etc., as desired.
In an embodiment of the present invention, a computer-readable storage medium has a computer program stored thereon, and the computer program can realize the demodulation reference signal scheduling method as described in the foregoing embodiment when executed by a processor. That is, when part or all of the technical solutions of the embodiments of the present invention contributing to the prior art are embodied by means of a computer software product, the computer software product is stored in a computer-readable storage medium. The computer readable storage medium can be any portable computer program code entity apparatus or device. For example, the computer readable storage medium may be a U disk, a removable magnetic disk, a magnetic diskette, an optical disk, a computer memory, a read-only memory, a random access memory, etc.
It should be noted that the above embodiments can be freely combined as necessary. The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims (10)

1. A method for scheduling demodulation reference signals, comprising:
acquiring speed estimation of a user, signal-to-noise ratio estimation of a data channel and first scheduling information; the first scheduling information comprises at least one of a modulation and coding mode, a service quality grade and a scheduling bandwidth;
determining the number of initial DMRS symbols according to the speed estimation of the user;
determining a DMRS configuration mode according to the initial DMRS symbol number; the DMRS configuration mode comprises a single symbol configuration and a dual symbol configuration;
dynamically adjusting the initial DMRS symbol number according to the DMRS configuration mode and the first scheduling information to obtain a final DMRS symbol number;
and scheduling the demodulation reference signals of the corresponding data channels for the users according to the DMRS configuration mode and the final DMRS symbol number.
2. The method according to claim 1, wherein the determining the DMRS configuration pattern according to the initial DMRS symbol number comprises:
and if the initial DMRS symbols are even numbers and the signal-to-noise ratio estimation is smaller than a first signal-to-noise ratio threshold, determining that the DMRS configuration mode is dual-symbol configuration.
3. The method according to claim 1, wherein the dynamically adjusting the initial number of DMRS symbols according to the DMRS configuration pattern and the first scheduling information to obtain a final number of DMRS symbols comprises:
the first scheduling information comprises a modulation coding mode;
and if the DMRS configuration mode is single symbol configuration and the initial DMRS symbol number is greater than the first symbol number, judging whether the number of the DMRS symbols needs to be reduced according to the modulation coding mode and the signal-to-noise ratio estimation.
4. The method according to claim 3, wherein said determining whether the number of DMRS symbols needs to be reduced according to the modulation and coding scheme and the SNR estimation comprises:
if the modulation coding mode is smaller than a preset modulation threshold and the signal-to-noise ratio estimation is larger than a second signal-to-noise ratio threshold, reducing the number of the initial DMRS symbols to obtain the number of final DMRS symbols; the second signal-to-noise ratio threshold is greater than the first signal-to-noise ratio threshold.
5. The method according to claim 1, wherein the dynamically adjusting the initial number of DMRS symbols according to the DMRS configuration pattern and the first scheduling information to obtain a final number of DMRS symbols further comprises:
the first scheduling information comprises a service quality grade and a scheduling bandwidth;
if the DMRS configuration mode is single symbol configuration and the initial DMRS symbol number is less than a second symbol number, judging whether the number of the DMRS symbols needs to be increased or not according to the service quality level and the scheduling bandwidth; the second number of symbols is greater than the first number of symbols.
6. The method according to claim 5, wherein said determining whether the number of DMRS symbols needs to be increased according to the quality of service level and the scheduling bandwidth comprises:
and if the service quality grade is greater than a preset service quality threshold and the scheduling bandwidth is less than a preset bandwidth threshold, increasing the number of the initial DMRS symbols to obtain the number of the final DMRS symbols.
7. A demodulation reference signal scheduling apparatus, comprising:
the information acquisition module is used for acquiring the speed estimation of a user, the signal-to-noise ratio estimation of a data channel and first scheduling information; the first scheduling information comprises at least one of a modulation and coding mode, a service quality grade and a scheduling bandwidth;
an initial number determination module, configured to determine, according to the speed estimation of the user, an initial DMRS symbol number;
a configuration mode determining module, configured to determine a DMRS configuration mode according to the initial DMRS symbol number; the DMRS configuration mode comprises a single symbol configuration and a dual symbol configuration;
a target number determination module, configured to dynamically adjust the number of the initial DMRS symbols according to the DMRS configuration pattern and the first scheduling information, to obtain a final number of DMRS symbols;
and the symbol scheduling module is used for scheduling the demodulation reference signals of the corresponding data channels for the users according to the DMRS configuration mode and the final DMRS symbol quantity.
8. The demodulation reference signal scheduling apparatus according to claim 7, wherein:
the configuration mode determining module is further configured to determine that the DMRS configuration mode is dual-symbol configuration if the initial DMRS symbol number is even and the snr estimation is smaller than a first snr threshold.
9. An electronic device, comprising:
a memory for storing a computer program;
a processor for implementing the demodulation reference signal scheduling method according to any one of claims 1 to 6 when running the computer program.
10. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the steps of the demodulation reference signal scheduling method according to any one of claims 1 to 6.
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114866212A (en) * 2022-06-06 2022-08-05 中国电信股份有限公司 DMRS configuration method and device, and base station
WO2022257848A1 (en) * 2021-06-07 2022-12-15 展讯通信（上海）有限公司 Demodulation reference signal configuration method and apparatus
CN116131999A (en) * 2023-03-29 2023-05-16 新华三技术有限公司 Code rate adjusting method, device, electronic equipment and machine-readable storage medium

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110128909A1 (en) * 2009-10-30 2011-06-02 Qualcomm Incorporated Method and apparatus for mutiplexing reference signal and data in a wireless communication system
US20180069652A1 (en) * 2015-04-10 2018-03-08 Panasonic Intellectual Property Corporation Of America Base station, terminal, receiving method, and transmission method
CN109818722A (en) * 2017-11-20 2019-05-28 深圳市金立通信设备有限公司 Sending method, method of reseptance and the base station of demodulated reference signal, user equipment
CN110679111A (en) * 2017-03-31 2020-01-10 Lg电子株式会社 Method for transmitting and receiving reference signal in wireless communication system and apparatus therefor

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110128909A1 (en) * 2009-10-30 2011-06-02 Qualcomm Incorporated Method and apparatus for mutiplexing reference signal and data in a wireless communication system
US20180069652A1 (en) * 2015-04-10 2018-03-08 Panasonic Intellectual Property Corporation Of America Base station, terminal, receiving method, and transmission method
CN110679111A (en) * 2017-03-31 2020-01-10 Lg电子株式会社 Method for transmitting and receiving reference signal in wireless communication system and apparatus therefor
CN109818722A (en) * 2017-11-20 2019-05-28 深圳市金立通信设备有限公司 Sending method, method of reseptance and the base station of demodulated reference signal, user equipment

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
HUAWEI等: "R1-1706934 "Evaluation results of DMRS design for DL data channel"", 《3GPP TSG_RAN\WG1_RL1》 *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022257848A1 (en) * 2021-06-07 2022-12-15 展讯通信（上海）有限公司 Demodulation reference signal configuration method and apparatus
CN114866212A (en) * 2022-06-06 2022-08-05 中国电信股份有限公司 DMRS configuration method and device, and base station
CN116131999A (en) * 2023-03-29 2023-05-16 新华三技术有限公司 Code rate adjusting method, device, electronic equipment and machine-readable storage medium
CN116131999B (en) * 2023-03-29 2023-07-25 新华三技术有限公司 Code rate adjusting method, device, electronic equipment and machine-readable storage medium

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