CN114726491A

CN114726491A - DMRS configuration method, electronic device, and storage medium

Info

Publication number: CN114726491A
Application number: CN202110013322.XA
Authority: CN
Inventors: 徐晓景; 林伟; 芮华; 李瑞梅
Original assignee: ZTE Corp
Current assignee: ZTE Corp
Priority date: 2021-01-06
Filing date: 2021-01-06
Publication date: 2022-07-08
Also published as: WO2022148099A1

Abstract

The embodiment of the invention relates to the technical field of communication, in particular to a DMRS configuration method, electronic equipment and a computer readable storage medium. The DMRS configuration method comprises the following steps: acquiring channel characteristics of a target channel of User Equipment (UE) transmission data; determining the scene type of the target channel according to the channel characteristics and a preset identification model for identifying the scene type of the channel; acquiring a demodulation reference signal DMRS configuration suggestion according to the scene type; wherein the DMRS configuration proposal comprises the number of configured pilot symbols; and indicating the UE to carry out DMRS configuration according to the DMRS configuration suggestion. The DMRS configuration method provided by the embodiment of the invention aims to adaptively adjust the number of DMRS symbols of a service channel according to the channel change condition of a user, thereby effectively improving the performance of a system and improving the throughput of the system.

Description

DMRS configuration method, electronic device, and storage medium

Technical Field

The embodiment of the application relates to the technical field of communication, in particular to a DMRS configuration method, electronic equipment and a storage medium.

Background

With the rapid development of communication technology, in a New wireless (New Radio, NR) of a fifth Generation mobile communication technology (5th Generation wireless systems, abbreviated as 5G), in order to support different wireless channel scenarios and meet the estimation accuracy of channel time-varying property, various combinations of a pilot (i.e. a pilot symbol that appears for the first time) and an additional pilot (more pilot symbols inserted within a scheduling duration to meet the estimation accuracy of channel time-varying property) are formulated by a third Generation Partnership Project (3 GPP standard) to meet the requirements, and the 3GPP standard sets a fixed number of pilot symbols for various scenarios to configure Demodulation Reference signals (DMRS signals).

However, in practical situations, the mobile state of a User Equipment (User Equipment, abbreviated as UE) will change continuously, and if the number of fixed configured pilot symbols is too small, the channel estimation accuracy may be insufficient in a medium-high speed mobile scenario, thereby causing performance loss; if the number of the fixedly configured pilot symbols is too large, when a user moves in a low-speed scene, resource waste can be caused, the frequency spectrum efficiency of a cell system is reduced, namely the performance of the system is not high, the throughput of the system is insufficient, and poor use experience is brought to the user.

Disclosure of Invention

The embodiment of the application mainly aims to provide a DMRS configuration method, electronic equipment and a storage medium. The method aims to adaptively adjust the number of DMRS symbols of a service channel according to the channel change condition of a user, thereby effectively improving the performance of a system and improving the throughput of the system.

In order to achieve the above object, an embodiment of the present application provides a DMRS configuration method, including: acquiring channel characteristics of a target channel of User Equipment (UE) transmission data; determining the scene type of the target channel according to the channel characteristics and a preset identification model for identifying the scene type of the channel; acquiring a demodulation reference signal DMRS configuration suggestion according to the scene type; wherein the DMRS configuration proposal comprises the number of configured pilot symbols; and indicating the UE to carry out DMRS configuration according to the DMRS configuration suggestion.

In order to achieve the above object, an embodiment of the present application further provides a DMRS configuration method, which is applied to a UE, where the UE and a base station transmit data through a target channel, and the method includes: acquiring a DMRS configuration suggestion sent by a base station; the DMRS configuration suggestion comprises the number of configured pilot symbols, the DMRS configuration suggestion is obtained according to the scene type of the target channel, and the scene type of the target channel is determined according to the channel characteristic of the target channel and a preset identification model for identifying the scene type of the channel; and carrying out DMRS configuration according to the DMRS configuration suggestion.

In order to achieve the above object, an embodiment of the present application further provides an electronic device, including: at least one processor; and a memory communicatively coupled to the at least one processor; wherein the memory stores instructions executable by the at least one processor to enable the at least one processor to perform the above-described DMRS configuration method applied to a base station or to perform the above-described DMRS configuration method applied to a UE.

To achieve the above object, an embodiment of the present application further provides a readable storage medium storing a computer program, which when executed by a processor, implements the above DMRS configuration method applied to a base station, or implements the above DMRS configuration method applied to a UE.

The DMRS configuration method, the electronic device and the storage medium provided by the application can acquire the channel characteristics of the target channel of the data transmission of the user equipment UE, and the channel characteristics of the target channel of the data transmission of the user equipment UE can truly and fully reflect the current channel state and working condition of the target channel. And determining the scene type of the target channel according to the channel characteristics and a preset identification model for identifying the scene type of the channel, wherein the channel characteristics can be more accurately and comprehensively considered by using the identification model in consideration of the fact that the traditional judgment method cannot accurately judge a complex wireless channel environment, so that the scene type of the target channel is determined, and the identification accuracy rate of the scene type of the target channel can be greatly improved. And acquiring a demodulation reference signal (DMRS) configuration suggestion according to the scene type, wherein the configuration suggestion comprises the number of configured pilot symbols, and indicating the UE to carry out DMRS configuration according to the DMRS configuration suggestion. Considering that the related technology only judges a channel scene according to a measurement quantity, the complex channel environment is not accurately depicted, the self-adaptive switching of the DMRS symbols cannot be accurately performed, and the whole process of switching the number of the DMRS symbols is not given, so that the performance of the system cannot be ensured.

Drawings

Fig. 1 is a flowchart of a DMRS configuration method according to a first embodiment of the present invention;

fig. 2 is a flowchart for obtaining channel characteristics of a target channel for data transmission of a user equipment UE according to a first embodiment of the present invention;

fig. 3 is a flowchart for acquiring characteristics of a random access channel according to a first embodiment of the present invention;

fig. 4 is a flowchart of a DMRS configuration method according to a second embodiment of the present invention;

fig. 5 is a flowchart for determining a scene type of a target channel according to an SINR corresponding to each access signaling and a scene type corresponding to each access signaling according to the second embodiment of the present invention;

fig. 6 is a diagram illustrating a specific implementation of a DMRS configuration according to a second embodiment of the present invention;

fig. 7 is a flowchart of a DMRS configuration method according to a third embodiment of the present invention;

fig. 8 is a flowchart for determining a scene type of a PUSCH according to channel characteristics obtained each time and a preset recognition model for recognizing a scene type of a channel according to a third embodiment of the present invention;

fig. 9 is a diagram illustrating a specific implementation of a DMRS configuration according to a third embodiment of the present invention;

fig. 10 is a flowchart of a DMRS configuration method according to a fourth embodiment of the present invention;

fig. 11 is a schematic structural diagram of an electronic device according to a fifth embodiment of the present invention.

Detailed Description

To make the objects, technical solutions and advantages of the embodiments of the present application clearer, the embodiments of the present application will be described in detail below with reference to the accompanying drawings. However, it will be appreciated by those of ordinary skill in the art that in the examples of the present application, numerous technical details are set forth in order to provide a better understanding of the present application. However, the technical solution claimed in the present application can be implemented without these technical details and various changes and modifications based on the following embodiments. The following embodiments are divided for convenience of description, and should not constitute any limitation to the specific implementation manner of the present application, and the embodiments may be mutually incorporated and referred to without contradiction.

The first embodiment of the invention relates to a DMRS configuration method which is applied to a base station. The implementation details of the DMRS configuration method of this embodiment are specifically described below, and the following description is only provided for facilitating understanding of the implementation details, and is not necessary to implement this embodiment.

The specific procedure of the DMRS configuration method of this embodiment may be as shown in fig. 1, and includes:

step 101, obtaining channel characteristics of a target channel of User Equipment (UE) transmission data;

specifically, when the base station instructs the UE to perform DMRS configuration, the base station may first acquire a channel characteristic of a target channel for data transmission by the UE. The target channel, i.e. the channel where the user equipment UE is located, and the channel characteristics of the target channel can truly and sufficiently reflect the current channel state and working condition of the target channel.

In a specific implementation, the channel characteristics of the target channel for data transmission of the user equipment UE, acquired by the base station, include, but are not limited to: channel time domain estimated value, channel frequency domain estimated value, data after channel equalization, signal to interference plus noise ratio (SINR), and the like. The base station can also arbitrarily combine the channel time domain estimated value, the channel frequency domain estimated value, the data after channel equalization, the signal-to-interference-plus-noise ratio (SINR), and the like to obtain a channel characteristic set. By comprehensively considering various channel characteristics, the DMRS configuration can be more accurate.

In an example, the channel-equalized data includes channel-equalized IQ data, and the base station may calculate rotation angles of the constellation diagrams on different data symbols according to the channel-equalized IQ data, and use the rotation angles of the constellation diagrams on different data symbols as the channel characteristics.

In an example, obtaining a channel characteristic of a target channel for data transmission by a user equipment UE may be implemented by the sub-steps shown in fig. 2, which specifically include:

substep 1011, determining whether the UE is in the initial access phase, if yes, executing substep 1012, otherwise, executing substep 1014;

specifically, when the base station performs DMRS configuration on the UE, it may first determine whether the UE is in an initial access phase, and if the UE is in the initial access phase, enter a procedure of acquiring a channel characteristic of a target channel of data transmission of the UE in the initial access phase; if the UE is not in the initial access stage, the base station determines that the UE is in the normal service stage, and enters the process of acquiring the channel characteristics of the target channel of the UE transmission data in the normal service stage.

Substep 1012, acquiring a plurality of access signaling sent by the UE to the base station in the initial access phase;

specifically, if the base station determines that the UE is in the initial access phase, several access signaling sent by the UE in the initial access phase may be acquired. Here, the access signaling may also be referred to as an access message, and the access signaling will be described below.

In a specific implementation, the UE may send, to the base station, a first access signaling (message1, abbreviated as MSG1) for accessing the base station in an initial access phase, the base station sends, to the UE, a second access signaling (message2, abbreviated as MSG2) for responding to the MSG1 after receiving the MSG1, the UE sends, to the base station, a third access signaling (message3, abbreviated as MSG3) for requesting Radio Resource Control (RRC) establishment or reestablishment after receiving the MSG2, the base station may send, to the UE, a fourth access signaling (message4, abbreviated as MSG4) for instructing the UE to perform RRC establishment or reestablishment after receiving the MSG3, and the UE may send, to the base station, a fifth access signaling (message5, abbreviated as MSG5) for completing RRC establishment or reestablishment after receiving the MSG 4.

A substep 1013, obtaining channel characteristics of a channel carrying a plurality of access signalings according to the plurality of access signalings;

specifically, after acquiring a plurality of access signaling sent by the UE to the base station in the initial access stage, the base station may acquire channel characteristics of a channel carrying the plurality of access signaling according to the plurality of access signaling. In the initial access stage, the channel characteristics of the channel bearing the plurality of access signaling are obtained according to the plurality of access signaling, so that the obtained channel characteristics are more comprehensive and accurate, and the channel scene identification is carried out in the initial access stage, so that the signaling configuration overhead can be properly reduced.

In a specific implementation, each time the UE sends an access signaling to the base station, the base station may obtain a channel time domain estimation value, a channel frequency domain estimation value, a data and signal to interference plus noise ratio SINR after channel equalization, and the like of a channel carrying the access signaling when the access signaling is transmitted.

In an example, a Channel for transmitting the first Access signaling is a Random Access Channel (PRACH), and the obtaining of the Channel characteristics of the Random Access Channel by the base station may be implemented by the steps shown in fig. 3, which are specifically as follows:

step 201, obtaining a channel estimation value of a first access signaling repeated n times on a PRACH according to a preset number n of repeated transmission times of the first access signaling;

specifically, the base station may obtain a channel estimation value of the first access signaling repeated n times on the PRACH according to a preset number n of times of repeated transmission of the first access signaling. The preset number n of times of the repeated sending of the first access signaling may be set by a person skilled in the art according to actual needs, and this is not specifically limited in the embodiment of the present invention.

In a specific implementation, the preset number n of times of the repeated transmission of the first access signaling is the number of times of the repeated transmission of the first access signaling in the PRACH.

In an example, the initial access phase uses a short format PRACH format B4, the subcarrier interval is 30kHz, the number of times of repeated transmission of the first access signaling may be set to 12, and the channel estimation value at the first repetition may be recorded as:

step 202, determining a correlation value of a channel estimation value at the ith repetition and a channel estimation value at the (i plus) th Δ n repetition according to a channel estimation value of a PRACH and a preset time interval Δ n;

specifically, after acquiring the channel estimation value of the first access signaling repeated n times on the PRACH, the base station may determine a correlation value between the channel estimation value at the ith repetition time and the channel estimation value at the (i +/Δ n) th repetition time according to the channel estimation value repeated n times on the PRACH and a preset time interval Δ n. Wherein i is an integer greater than 0 and less than n- Δ n. The correlation value of the two values may represent the correlation between the two values, and a larger correlation value indicates that the two values are more correlated, i.e., the UE moves at a slow speed, and a smaller correlation value indicates that the two values are less correlated, i.e., the UE moves at a fast speed. The preset time interval Δ n may be set by a person skilled in the art according to actual needs, and the embodiment of the present invention is not particularly limited thereto.

In one example, the number of times of repeated transmission of the first access signaling is 12, and Δ n may be 1, 2, 4, 6, 8, 10. That is, when Δ n is 1, calculating a correlation value between the channel estimation value at the 1 st repetition and the channel estimation value at the 2 nd repetition, a correlation value between the channel estimation value at the 2 nd repetition and the channel estimation value at the 3rd repetition, and the like; when Δ n is 4, a correlation value between the channel estimation value at the 1 st repetition and the channel estimation value at the 5th repetition, a correlation value between the channel estimation value at the 2 nd repetition and the channel estimation value at the 6 th repetition, and the like are calculated.

Such as: Δ n is 6, and the channel estimate at 1 st repetition is

The channel estimate at the 7 th iteration is

The correlation value between the channel estimation value at the 1 st repetition and the channel estimation value at the 7 th repetition can be written as H_corr,6。

And 203, acquiring the channel characteristics of the PRACH according to the correlation value.

Specifically, after determining a correlation value between the channel estimation value obtained at the ith time and the channel estimation value obtained at the (i + DELTAn) th time, the base station may obtain the channel characteristics of the PRACH according to the correlation value. Only the first access signaling is transmitted on the PRACH, so that the channel characteristics of the PRACH, that is, the channel characteristics of the PRACH corresponding to the first access signaling are obtained.

In a specific implementation, the base station may calculate amplitude and phase values of correlation values between the channel estimation value acquired at the ith time and the channel estimation value acquired at the i +/Δ n times, and the base station may use the amplitude and phase values as a channel feature set of the PRACH.

In one example, the correlation value between the channel estimation value obtained at the 1 st time and the channel estimation value obtained at the 7 th time is H_corr,6The magnitude of the correlation value is: a. the_corr,6＝|H_corr,6The phase value of the correlation is: theta_corr,6＝angle(H_corr,6)。

In another example, the channel for transmitting the third access signaling and the fifth access signaling is an uplink shared channel (PUSCH), and the base station may obtain the channel characteristic of the PUSCH according to the third access signaling and obtain the channel characteristic of the PUSCH according to the fifth access signaling.

Such as: the PUSCH for transmitting MSG3 and MSG5 occupies 14 symbols, 2 pilot symbols adopt DMRS Type1 and are located at symbols 2 and 11, the base station may calculate time-frequency domain normalized signal power according to the channel estimation values of the 2 pilot symbols, and amplitude and phase values of normalized correlation values of the 2 pilot symbol channel estimation values, and the time-frequency domain normalized signal power is calculated from the channel estimation values of the 2 pilot symbols, and the amplitude and phase values of the normalized correlation values of the 2 pilot symbol channel estimation values form a channel feature set.

Substep 1014, acquiring service data sent by the UE to the base station in the normal service phase;

specifically, if the base station determines that the UE is in the normal service phase, the service data sent by the UE to the base station in the normal service phase may be acquired.

In a specific implementation, the UE in the normal service phase may send service data to the base station, where the service data may complete a mobile service of the UE regarding a call, internet, and the like.

Substep 1015, obtaining the channel characteristics of the target channel of the UE transmission data according to the service data;

specifically, after acquiring the service data sent to the base station by the UE in the normal service phase, the base station may acquire the channel characteristics of the target channel of the data transmitted by the UE according to the service data.

In a specific implementation, each time the UE sends one piece of service data to the base station, the base station may obtain a channel time domain estimation value, a channel frequency domain estimation value, a data and signal to interference plus noise ratio SINR after channel equalization, and the like of a target channel when the target channel transmits the piece of service data.

Step 102, determining a scene type of a target channel according to the channel characteristics and a preset identification model for identifying the scene type of the channel;

specifically, after acquiring the channel characteristics of the target channel of the data transmitted by the UE, the base station may determine the scene type of the target channel according to the channel characteristics and a preset identification model for identifying the scene type of the channel. The scene type is a scene type of a UE transmitting data in a target channel under the scene type. Considering that the traditional judgment method cannot accurately judge a complex wireless channel environment, the channel characteristics can be more accurately and comprehensively considered by using the identification model, so that the scene type of the target channel is determined, and the identification accuracy rate of the scene type of the target channel can be greatly improved.

In a specific implementation, the preset recognition model for recognizing the scene type of the channel may be an open source model obtained from the internet, or a model trained according to a labeled training set, which is not specifically limited in the embodiment of the present invention.

In one example, the preset recognition model for recognizing the scene type of the channel may be a deep learning based neural network model. The base station can acquire channel characteristic information of a plurality of scene types marked with channels in advance to serve as a training set of the neural network model, and iteratively train the neural network model according to the training set until the identification model with the identification precision reaching a preset standard is obtained.

In one example, the scene types of the target channel may include a first scene type, a second scene type, and a third scene type. The scene with the moving speed of the UE not more than 20km/h is a first scene type, such as fine stillness, walking, cycling and the like; the scene with the moving speed of the UE more than 20km/h and not more than 160km/h is a second scene type, such as a running automobile and the like; and the scene with the moving speed of the UE more than 160km/h is a third scene type, such as a traveling train, a high-speed rail and the like.

In an example, the base station obtains channel characteristics of a target channel for transmitting data by the UE, which correspond to each access signaling, according to the multiple access signaling, and may determine a scene type corresponding to each access signaling according to the channel characteristics corresponding to each access signaling and a preset identification model for identifying the scene type of the channel.

103, acquiring a demodulation reference signal DMRS configuration suggestion according to the scene type;

specifically, after determining the scene type of the target channel, the base station may obtain a demodulation reference signal DMRS configuration suggestion according to the scene type, where the DMRS configuration suggestion includes the number of configured pilot symbols.

In a specific implementation, after determining a scene type of a target channel, a base station may provide DMRS configuration suggestions such as the number of pilot symbols to be configured and the positions of the pilot symbols according to the scene type.

In one example, the scene types include a first scene type, a second scene type, and a third scene type, where a moving speed of the UE in the first scene type is lower than a moving speed of the UE in the second scene type, and a moving speed of the UE in the second scene type is lower than a moving speed of the UE in the third scene type. For a first scene type, the DMRS configuration suggestion given by the base station comprises 1 number of configured pilot symbols; for a second scene type, the DMRS configuration suggestion given by the base station comprises 2 or 3 configured pilot symbols; for the third scenario type, the DMRS configuration proposal given by the base station includes 3 or 4 pilot symbols configured. For static and low-speed mobility scenes, because the coherence time is long, the channel state can be estimated more accurately only by configuring the preposed pilot (i.e. 1 pilot symbol) on the traffic channel, but for medium-high speed mobile scenes, the time-varying property of the channel can be well tracked only by configuring 2 or 3 pilot symbols on the traffic channel, and for ultra-high speed mobile scenes, the time-varying property of the channel can be well tracked only by configuring 3 or 4 pilot symbols on the traffic channel. The scene with high moving speed is configured with a plurality of pilot symbols, which can ensure the channel estimation precision, thereby ensuring the system performance, and the scene with low moving speed is configured with 1 pilot symbol, which can save resources and improve the system spectrum efficiency.

And step 104, indicating the UE to carry out DMRS configuration according to the DMRS configuration suggestion.

Specifically, after obtaining the DMRS configuration suggestion, the base station may instruct the UE to perform DMRS configuration according to the DMRS configuration suggestion.

In a specific implementation, the steps of identifying the scene type of the target channel and obtaining the DMRS configuration suggestion and the like are performed in a network layer, and after obtaining the DMRS configuration suggestion, the base station may issue the DMRS configuration suggestion to a physical layer to indicate the UE to perform DMRS configuration.

The first embodiment of the invention obtains the channel characteristics of the target channel of the data transmission of the user equipment UE, and the channel characteristics of the target channel of the data transmission of the user equipment UE can truly and fully reflect the current channel state and working condition of the target channel. And determining the scene type of the target channel according to the channel characteristics and a preset identification model for identifying the scene type of the channel, wherein the channel characteristics can be more accurately and comprehensively considered by using the identification model in consideration of the fact that the traditional judgment method cannot accurately judge a complex wireless channel environment, so that the scene type of the target channel is determined, and the identification accuracy rate of the scene type of the target channel can be greatly improved. And acquiring a demodulation reference signal (DMRS) configuration suggestion according to the scene type, wherein the configuration suggestion comprises the number of configured pilot symbols, and indicating the UE to carry out DMRS configuration according to the DMRS configuration suggestion. Considering that the related technology only judges a channel scene according to a measurement quantity, the complex channel environment is not accurately depicted, the self-adaptive switching of the DMRS symbols cannot be accurately performed, and the whole process of switching the number of the DMRS symbols is not given, so that the performance of the system cannot be ensured.

A second embodiment of the present invention relates to a DMRS configuration method, and the implementation details of the DMRS configuration method of this embodiment are specifically described below, and the following are only implementation details provided for easy understanding, and are not necessary for implementing this solution, and fig. 4 is a DMRS configuration method according to the second embodiment of the present invention, and includes:

step 301, if the UE is in an initial access phase, acquiring a plurality of access signaling sent by the UE to the base station in the initial access phase;

step 302, according to a plurality of access signaling, obtaining channel characteristics of a channel bearing the plurality of access signaling;

step 303, determining a scene type corresponding to the plurality of access signaling according to channel characteristics of a channel carrying the plurality of access signaling and a preset identification model for identifying the scene type of the channel;

steps 301 to 303 have been described similarly in the first embodiment, and are not described again here.

Step 304, determining the scene type of the channel carrying the plurality of access signals according to the SINR of the channel carrying the plurality of access signals and the scene type corresponding to the plurality of access signals;

in a specific implementation, the channel characteristics corresponding to each access signaling acquired by the base station include a Signal to Interference plus Noise Ratio (SINR) corresponding to each access signaling, and the base station may determine a scene type of the target channel according to the SINR corresponding to each access signaling and a scene type corresponding to each access signaling. A larger SINR represents less interference and a smaller SINR value represents greater interference received. The scene type of the channel judged according to the scene type corresponding to the access signaling with the SINR larger than the preset SINR threshold value is more stable, the interference is less, and the possibility of misjudgment is low.

In an example, determining the scene type of the target channel according to the SINR corresponding to each access signaling and the scene type corresponding to each access signaling may be implemented by the sub-steps shown in fig. 5, which are as follows:

substep 3041, determining whether the SINR of a channel carrying a plurality of access signaling is greater than a preset SINR threshold, and determining an effective scene type in the scene types corresponding to the plurality of access signaling according to the determination result;

specifically, the base station may determine whether an SINR of a channel carrying the multiple access signaling is greater than a preset SINR threshold, and determine an effective scene type from scene types corresponding to the multiple access signaling according to a determination result, where the effective scene type is a scene type corresponding to the access signaling whose SINR is greater than the preset SINR threshold. The SINR threshold may be set by those skilled in the art according to actual needs, which is not specifically limited in the embodiment of the present invention, and the SINR threshold is generally set to 5dB to 10 dB.

In one example, the SINR threshold is 5dB, the SINR corresponding to MSG1 is 10dB, the SINR corresponding to MSG3 is 4dB, the SINR corresponding to MSG5 is 8dB, and the base station determines that the scene type corresponding to MSG1 and the scene type corresponding to MSG5 are valid scene types.

Substep 3042, determining the scene type of the channel carrying several access signalings according to the effective scene type.

Specifically, after determining the effective scene type, the base station may determine the scene type of the channel carrying the several access signaling according to the effective scene type.

In an example, the base station may select a scene type corresponding to the access signaling with the largest SINR value among all effective scene types to determine as a scene type of a channel carrying several access signaling.

Such as: the SINR corresponding to the MSG1 is 10dB, and the scene type corresponding to the MSG1 is a medium-high speed scene; the SINR for MSG5 is 8dB, the scene type for MSG5 is an ultra high speed scene, and the SINR for MSG1 is greater than the SINR for MSG 5. The base station determines the scene type of a channel carrying a plurality of access signaling to be a medium-high speed scene.

305, acquiring a demodulation reference signal DMRS configuration suggestion according to the scene type;

and step 306, indicating the UE to carry out DMRS configuration according to the DMRS configuration suggestion.

Steps 305 to 306 are already described in the first embodiment, and are not described herein again.

In an example, a specific implementation procedure of the DMRS configuration method of this embodiment may be as shown in fig. 6, and specifically includes:

step 401, the UE sends MSG1, MSG3 and MSG5 to the base station;

specifically, the base station may acquire MSG1, MSG3, and MSG5 that the UE transmits to the base station.

Step 402, the base station identifies a scene type corresponding to the MSG1, a scene type corresponding to the MSG3 and a scene type corresponding to the MSG 5;

step 403, the base station performs comprehensive decision according to the scene type corresponding to MSG1, the scene type corresponding to MSG3 and the scene type corresponding to MSG5, and determines the scene type of the channel carrying a plurality of access signaling;

step 404, selecting a DMRS configuration proposal according to the scene type;

step 405, the base station sends DMRS configuration suggestion to the UE through RRC to perform DMRS reconfiguration.

In a second embodiment of the present invention, the channel characteristics include a signal to interference plus noise ratio SINR of the channel carrying the plurality of access signaling; the determining the scene type of the target channel according to the channel characteristics and a preset identification model for identifying the scene type of the channel comprises the following steps: determining scene types corresponding to the plurality of access signals according to channel characteristics of a channel bearing the plurality of access signals and a preset identification model for identifying the scene types of the channel; the scene type of the channel bearing the access signaling is determined according to the SINR of the channel bearing the access signaling and the scene type corresponding to the access signaling, comprehensive judgment is carried out according to the channel characteristics corresponding to the access signaling, the obtained scene type of the channel can be more accurate, and the scene type fits the actual use condition of a user, so that the DMRS configuration is more reasonable, the performance and the throughput of a system are further improved, and the use experience of the user is improved. The determining the scene type of the target channel according to the SINR corresponding to each access signaling and the scene type corresponding to each access signaling includes: judging whether the SINR of the channel bearing the plurality of access signals is larger than a preset SINR threshold value or not, and determining an effective scene type in the scene types corresponding to the plurality of access signals according to the judgment result; the effective scene type is a scene type corresponding to the access signaling of which the SINR is greater than the SINR threshold value; and determining the scene type of the channel carrying the plurality of access signals according to the effective scene type, wherein the scene type of the channel judged according to the scene type corresponding to the access signal of which the SINR is greater than the preset SINR threshold value is more stable, the interference is less, and the possibility of misjudgment is low.

A third embodiment of the present invention relates to a DMRS configuration method, and the implementation details of the DMRS configuration method of the present embodiment are specifically described below, and the following are only implementation details provided for easy understanding and are not necessary for implementing the present solution, and fig. 7 is a schematic diagram of the DMRS configuration method according to the third embodiment of the present invention, and includes:

step 501, if the UE is in a normal service stage, acquiring channel characteristics of the PUSCH for k times in a preset time window;

specifically, in the normal traffic phase, the UE transmits traffic data to the base station through the PUSCH. If the base station determines that the UE is in a normal service phase, the base station may obtain the channel characteristics of the PUSCH k times within a preset time window. Where k is an integer greater than 1, and the preset time window and the number of times of acquisition may be set by a person skilled in the art according to actual needs, which is not specifically limited in the embodiment of the present invention.

In one example, the PUSCH occupies 14 symbols and 1 pilot symbol, and adopts DMRS Type1, where the pilot symbol is located at symbol 3, and the base station may obtain a channel estimation value corresponding to the pilot symbol, calculate a time-frequency domain normalized signal power, and obtain a rotation angle of a constellation diagram of each data symbol according to IQ data after channel equalization to form a channel feature set.

In another example, the PUSCH occupies 14 symbols and 2 pilot symbols, and employs DMRS Type1, one pilot symbol is located at symbol 3, and the other pilot symbol is located at symbol 11, the base station obtains channel estimation values corresponding to the two pilot symbols, calculates time-frequency domain normalized signal power, and calculates amplitude and phase values of normalized correlation values of the channel estimation values of the two pilot symbols to form a channel feature set.

Step 502, determining the scene type of the PUSCH according to the acquired channel characteristics and a preset identification model for identifying the scene type of the channel;

specifically, after acquiring the channel characteristics of the PUSCH k times, the base station may determine the scene type of the PUSCH according to the channel characteristics acquired each time and a preset identification model for identifying the scene type of the channel.

In an example, determining the scene type of the PUSCH according to the channel characteristics obtained each time and a preset identification model for identifying the scene type of the channel may be implemented by the sub-steps shown in fig. 8, which are as follows:

substep 5021, determining an identification result corresponding to the channel characteristics acquired each time according to the channel characteristics acquired each time and a preset identification model for identifying the scene type of the channel;

specifically, the base station may determine, according to the channel feature obtained each time and a preset identification model for identifying a scene type of the channel, an identification result corresponding to the channel feature obtained each time. And the identification result comprises probability values of PUSCHs respectively belonging to various scene types.

In one example, according to the channel characteristics acquired at the sixth time and a preset identification model for identifying scene types of channels, the base station determines that probability values of PUSCH corresponding to the channel characteristics acquired at the sixth time respectively belonging to each scene type are as follows: the probability value of the static and low-speed moving scenes is 27%, the probability value of the medium-high speed moving scene is 88%, and the probability value of the ultra-high speed moving scene is 3%.

In another example, each time the obtained channel characteristics include each time the corresponding SINR is obtained, the base station may discard the invalid identification result by taking the corresponding identification result whose SINR is greater than the preset SINR threshold as the valid identification result.

A substep 5022, performing long-term filtering according to the probability values of the PUSCHs belonging to the scene types respectively in the identification result to obtain long-term probability values of the PUSCHs belonging to the scene types respectively; considering that the scene of the user in the normal service phase may change constantly, the scene type of the channel is determined according to the long-term probability value, so that the determined scene type of the channel is more reasonable, the DMRS configuration is more reasonable, and the use experience of the user is improved.

Specifically, after determining the identification result corresponding to the channel feature acquired each time, the base station may perform long-term filtering according to probability values of PUSCHs in the identification result, which respectively belong to each scene type, to acquire long-term probability values respectively belonging to each scene type.

In one example, the base station may perform long-term filtering by the following equation:

wherein n is the nth identification, m is the mth channel type, and beta is a preset filtering factor,

for the nth identified probability value of the mth type,

for the long-term probability values of the m-th type identified at the n-1 st time,

for the m-th long-term probability value identified for the nth time, the preset filtering factor may be set by a person skilled in the art, and the embodiment of the present invention is not particularly limited thereto.

Such as: the preset filtering factor is 0.9, the long-term probability value of the 2 nd type identified at the 5th time is 25%, the probability value of the 2 nd type identified at the 6 th time is 41%, and the base station determines that the long-term probability value of the 2 nd type identified at the 6 th time is as follows: 0.9 × 25% + (1-0.9) × 41% ═ 26.6%.

Substep 5023, determining the scene type of the PUSCH according to the long-term probability values respectively belonging to the scene types;

specifically, after obtaining the long-term probability values respectively belonging to the scene types, the base station may determine the scene type of the PUSCH according to the long-term probability values respectively belonging to the scene types.

In one example, the number of acquisition (identification) times is 10, the base station determines that the long-term probability value of the 1 st type identified at the 10 th time is 12.3%, the long-term probability value of the 2 nd type identified at the 10 th time is 37.8%, the long-term probability value of the 3rd type identified at the 10 th time is 91.4%, and the base station determines that the scene type of the PUSCH is the 3rd type.

Step 503, acquiring a demodulation reference signal DMRS configuration suggestion according to the scene type;

and step 504, indicating the UE to carry out DMRS configuration according to the DMRS configuration suggestion.

The steps 503 to 504 are already described in the first embodiment, and are not described herein again.

In one example, after performing DMRS configuration according to the DMRS configuration suggestion, the base station may further enter a next preset time window to update the DMRS configuration suggestion, and update the DMRS configuration according to the updated DMRS configuration suggestion.

In an example, a specific implementation procedure of the DMRS configuration method of this embodiment may be as shown in fig. 9, and specifically includes:

601, acquiring service data sent to a base station by UE for k times in a preset time window;

step 602, the base station identifies a scene type corresponding to the k times of acquired service data;

603, the base station carries out long-term statistical judgment on the scene type corresponding to the identified service data acquired for the second time;

step 604, selecting a DMRS configuration proposal according to the scene type;

step 605, the base station sends DMRS configuration suggestion to the UE through RRC to perform DMRS reconfiguration;

and 606, performing the next preset time window and performing the next round of configuration.

In a third embodiment of the present invention, if the UE is in a normal service phase, the target channel includes a physical uplink shared channel PUSCH, and the obtaining of the channel characteristics of a channel through which data is transmitted by the UE includes: acquiring the channel characteristics of the PUSCH for k times in a preset time window; wherein k is an integer greater than 0; the determining the scene type of the channel according to the channel characteristics and a preset identification model for identifying the scene type of the channel comprises the following steps: and determining the scene type of the PUSCH according to the acquired channel characteristics and a preset identification model for identifying the scene type of the channel. The UE is in a normal service stage, and the channel characteristics are acquired for many times in a preset time window to judge the scene type of the channel, so that the acquired scene type of the channel is more accurate and fits the actual use condition of a user, the DMRS is more reasonably configured, and the use experience of the user is improved. The determining the scene type of the PUSCH according to the channel characteristics obtained each time and a preset identification model for identifying the scene type of the channel includes: determining an identification result corresponding to the channel characteristics acquired each time according to the channel characteristics acquired each time and a preset identification model for identifying the scene type of the channel; the identification result comprises probability values of the PUSCHs belonging to the scene types respectively; performing long-term filtering according to the probability values of the PUSCHs respectively belonging to the scene types in the identification result to obtain long-term probability values respectively belonging to the scene types; and determining the scene type of the PUSCH according to the long-term probability values respectively belonging to the scene types. Considering that the scene of the user in the normal service phase may change constantly, the scene type of the channel is determined according to the long-term probability value, so that the determined scene type of the channel is more reasonable, the DMRS configuration is more reasonable, and the use experience of the user is improved. After the DMRS configuration is performed according to the DMRS configuration proposal, the method further includes: entering a next preset time window, and updating the DMRS configuration suggestion; and updating the DMRS configuration according to the updated DMRS configuration suggestion. The method can adapt to the constantly changing use scene of the user, further improve the performance and the throughput of the system and bring better use experience to the user.

A fourth embodiment of the present invention relates to a DMRS configuration method, and the implementation details of the DMRS configuration method of this embodiment are specifically described below, and the following are only implementation details provided for easy understanding, and are not necessary for implementing this embodiment, and fig. 10 is a DMRS configuration method according to the fourth embodiment of the present invention, and includes:

701, acquiring a DMRS configuration suggestion sent by a base station;

and step 702, carrying out DMRS configuration according to the DMRS configuration suggestion.

It is to be understood that the present embodiment is an embodiment applied to a UE corresponding to the first to third embodiments, and the present embodiment can be implemented in cooperation with the first to third embodiments. The related technical details and technical effects mentioned in the first to third embodiments are still valid in this embodiment, and are not described herein again in order to reduce repetition. Accordingly, the related-art details mentioned in the present embodiment can also be applied to the first to third embodiments.

The steps of the above methods are divided for clarity, and the implementation may be combined into one step or split some steps, and the steps are divided into multiple steps, so long as the same logical relationship is included, which are all within the protection scope of the present patent; it is within the scope of the patent to add insignificant modifications to the algorithms or processes or to introduce insignificant design changes to the core design without changing the algorithms or processes.

A fifth embodiment of the present invention relates to an electronic apparatus, as shown in fig. 11, including: at least one processor 801; and a memory 802 communicatively coupled to the at least one processor 801; wherein the memory 802 stores instructions executable by the at least one processor 801, the instructions are executed by the at least one processor 801 to enable the at least one processor 801 to perform the DMRS configuration method applied to the base station in each of the above embodiments when the electronic device is a base station; when the electronic device is a UE, the instructions are executed by the at least one processor 801, so that the at least one processor 801 can execute the DMRS configuration method applied to the UE in each of the above embodiments.

Where the memory and processor are connected by a bus, the bus may comprise any number of interconnected buses and bridges, the buses connecting together one or more of the various circuits of the processor and the memory. The bus may also connect various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. A bus interface provides an interface between the bus and the transceiver. The transceiver may be one element or a plurality of elements, such as a plurality of receivers and transmitters, providing a means for communicating with various other apparatus over a transmission medium. The data processed by the processor is transmitted over a wireless medium via an antenna, which further receives the data and transmits the data to the processor.

The processor is responsible for managing the bus and general processing and may also provide various functions including timing, peripheral interfaces, voltage regulation, power management, and other control functions. And the memory may be used to store data used by the processor in performing operations.

A sixth embodiment of the present invention relates to a computer-readable storage medium storing a computer program. The computer program realizes the above-described method embodiments when executed by a processor.

That is, as can be understood by those skilled in the art, all or part of the steps in the method for implementing the embodiments described above may be implemented by a program instructing related hardware, where the program is stored in a storage medium and includes several instructions to enable a device (which may be a single chip, a chip, or the like) or a processor (processor) to execute all or part of the steps of the method described in the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.

It will be understood by those of ordinary skill in the art that the foregoing embodiments are specific examples for carrying out the invention, and that various changes in form and details may be made therein without departing from the spirit and scope of the invention in practice.

Claims

1. A DMRS configuration method, comprising:

acquiring channel characteristics of a target channel of User Equipment (UE) transmission data;

determining the scene type of the target channel according to the channel characteristics and a preset identification model for identifying the scene type of the channel;

acquiring a demodulation reference signal DMRS configuration suggestion according to the scene type; wherein the DMRS configuration proposal comprises the number of configured pilot symbols;

and indicating the UE to carry out DMRS configuration according to the DMRS configuration suggestion.

2. The method for configuring DMRS according to claim 1, wherein if the UE is in an initial access phase, the target channel comprises a channel carrying a plurality of access signaling, and said obtaining the channel characteristics of the target channel for the UE to transmit data comprises:

acquiring the plurality of access signaling sent by the UE to a base station in the initial access stage;

and acquiring the channel characteristics of the channel bearing the access signaling according to the access signaling.

3. The method for DMRS configuration as claimed in claim 2, wherein said channel characteristics comprise a signal to interference plus noise ratio, SINR, of said channel carrying several access signallings;

the determining the scene type of the target channel according to the channel characteristics and a preset identification model for identifying the scene type of the channel comprises the following steps:

determining scene types corresponding to the plurality of access signals according to channel characteristics of a channel bearing the plurality of access signals and a preset identification model for identifying the scene types of the channel;

and determining the scene type of the channel carrying the plurality of access signals according to the SINR of the channel carrying the plurality of access signals and the scene type corresponding to the plurality of access signals.

4. The DMRS configuration method according to claim 3, wherein the determining the scene type of the channel carrying the plurality of access signaling according to the SINR of the channel carrying the plurality of access signaling and the scene type corresponding to the plurality of access signaling comprises:

judging whether the SINR of the channel bearing the plurality of access signals is larger than a preset SINR threshold value or not, and determining an effective scene type in the scene types corresponding to the plurality of access signals according to the judgment result; the effective scene type is a scene type corresponding to the access signaling of which the SINR is greater than the SINR threshold value;

and determining the scene type of the channel carrying the plurality of access signalings according to the effective scene type.

5. The method for configuring DMRS of claim 2, wherein if the UE is in a normal service phase, the target channel comprises a physical uplink shared channel, PUSCH, and the obtaining the channel characteristics of the channel through which the UE transmits data comprises:

acquiring the channel characteristics of the PUSCH for k times in a preset time window; wherein k is an integer greater than 0;

the determining the scene type of the channel according to the channel characteristics and a preset identification model for identifying the scene type of the channel comprises the following steps:

and determining the scene type of the PUSCH according to the acquired channel characteristics and a preset identification model for identifying the scene type of the channel.

6. The DMRS configuration method according to claim 5, wherein the determining the scene type of the PUSCH according to the channel characteristics obtained each time and a preset identification model for identifying the scene type of the channel comprises:

determining an identification result corresponding to the channel characteristics acquired each time according to the channel characteristics acquired each time and a preset identification model for identifying the scene type of the channel; the identification result comprises probability values of the PUSCHs belonging to the scene types respectively;

performing long-term filtering according to the probability values of the PUSCHs belonging to the scene types respectively in the identification result to obtain long-term probability values of the PUSCHs belonging to the scene types respectively;

and determining the scene type of the PUSCH according to the long-term probability values of the PUSCHs belonging to the scene types respectively.

7. The method for DMRS configuration according to claim 5, wherein after said DMRS configuration is performed according to said DMRS configuration proposal, said method further comprises:

entering a next preset time window, and updating the DMRS configuration suggestion;

and updating the DMRS configuration according to the updated DMRS configuration suggestion.

8. The method for DMRS configuration according to claim 1, wherein the scene type is a scene type of a UE transmitting data in a target channel under the scene type, and wherein the scene type includes a first scene type, a second scene type, and a third scene type; the moving speed of the UE in the first scene type is lower than that of the UE in the second scene type, and the moving speed of the UE in the second scene type is lower than that of the UE in the third scene type;

the obtaining of the DMRS configuration suggestion according to the scene type includes:

if the scene type is a first scene type, the DMRS configuration suggestion comprises 1 number of configured pilot symbols;

if the scene type is a second scene type, the DMRS configuration suggestion comprises 2 or 3 configured pilot symbols;

and if the scene type is a third scene type, the DMRS configuration suggestion comprises 3 or 4 configured pilot symbols.

9. The DMRS configuration method as claimed in claim 2, wherein said channel carrying several access signallings comprises: a random access channel (PRACH), wherein the access signals comprise a first access signal, and the first access signal is a signal which is sent by the UE in the PRACH and is used for accessing a base station;

the obtaining the channel characteristics of the channel carrying the plurality of access signaling according to the plurality of access signaling includes:

acquiring a channel estimation value of the first access signaling repeated for n times on the PRACH according to the preset repeated sending times n of the first access signaling;

determining a correlation value of the channel estimation value at the ith repetition time and the channel estimation value at the (i plus) th repeated time according to the channel estimation value and a preset time interval delta n; wherein i is an integer greater than 0 and less than n- Δ n;

and acquiring the channel characteristics of the PRACH according to the correlation value.

10. The method for DMRS configuration according to claim 2, wherein said channel carrying said number of access signaling comprises a PUSCH;

the plurality of access signaling comprises third access signaling, and the third access signaling is used for sending a Radio Resource Control (RRC) establishment request or a reconstruction request to a base station by the UE;

acquiring the channel characteristics of the PUSCH according to the third access signaling;

and/or the presence of a gas in the gas,

the plurality of access signaling comprise fifth access signaling, and the fifth access signaling is used for the UE to send RRC establishment completion information or reconstruction completion information to the base station;

and acquiring the channel characteristics of the PUSCH according to the fifth access signaling.

11. The DMRS configuration method according to any of claims 1-10, wherein said channel characteristics comprise any combination of: channel time domain estimation value, channel frequency domain estimation value, and data and signal to interference plus noise ratio SINR after channel equalization.

12. A DMRS configuration method is applied to a UE (user equipment), wherein the UE and a base station transmit data through a target channel, and the method comprises the following steps:

acquiring a DMRS configuration suggestion sent by a base station; the DMRS configuration suggestion comprises the number of configured pilot symbols, the DMRS configuration suggestion is obtained according to the scene type of the target channel, and the scene type of the target channel is determined according to the channel characteristic of the target channel and a preset identification model for identifying the scene type of the channel;

and carrying out DMRS configuration according to the DMRS configuration suggestion.

13. An electronic device, comprising:

at least one processor; and the number of the first and second groups,

a memory communicatively coupled to the at least one processor; wherein,

the memory stores instructions executable by the at least one processor;

when the electronic device is a base station, the instructions are executable by the at least one processor to enable the at least one processor to perform the DMRS configuration method as defined in any one of claims 1 to 11;

when the electronic device is a UE, the instructions are executable by the at least one processor to enable the at least one processor to perform the DMRS configuration method of claim 12.

14. A computer readable storage medium storing a computer program, wherein the computer program, when executed by a processor, implements the DMRS configuration method of any one of claims 1 to 11 or implements the DMRS configuration method of claim 12.