WO2018223826A1

WO2018223826A1 - User grouping method and apparatus using space division multiple access, and base station and storage medium

Info

Publication number: WO2018223826A1
Application number: PCT/CN2018/087245
Authority: WO
Inventors: 董广明; 游洪波
Original assignee: 中兴通讯股份有限公司
Priority date: 2017-06-05
Filing date: 2018-05-17
Publication date: 2018-12-13
Also published as: CN108989006A

Abstract

Provided are a user grouping method and apparatus using space division multiple access, and a base station and a storage medium. The user grouping method using space division multiple access comprises: receiving sounding reference signals reported by at least two different user terminals (S101); acquiring, according to the sounding reference signals, a channel estimation value of a channel where the user terminal is located (S102); calculating, according to the acquired channel estimation value, a correlation value representing a correlation between the two different user terminals sending the sounding reference signals (S103); and determining, according to the calculated correlation value, whether to perform space division multiplexing on data sent by the two different user terminals, and participating in the calculation (S104).

Description

User division method, device, base station and storage medium for space division multiple access

Technical field

The present disclosure relates to the field of network communication technologies, and in particular, to a user grouping method, apparatus, base station, and storage medium for spatial division multiple access.

Background technique

Currently, in the 3GPP (The 3rd Generation Partnership Project) communication system of LTE (Long Term Evolution), especially in the uplink channel, data transmitted by a highly correlated user is performed. Space division multiplexing, according to the 3GPP protocol rules, these users will choose orthogonal codes that interfere with each other in space division multiplexing mode, such as "1" and "11". If the base station encounters such orthogonal codes during decoding. It is easy to cause a decoding error, causing the user terminal to retransmit the data, and the retransmitted data may also cause a decoding error again due to improper space division multiplexing, causing a vicious circle, so that the decoded data and the data that may not be retransmitted are occupied. Bandwidth resources, seriously reducing the effective upstream traffic between users.

There is no better solution for this problem of unsuitable space division multiplexing between users resulting in reduced bandwidth effective upstream traffic.

Summary of invention

The following is an overview of the topics detailed in this document. This Summary is not intended to limit the scope of the claims.

A method, a device, a base station and a storage medium for a user division of a space division multiple access are provided for the problem that an inappropriate space division multiplexing causes a low effective uplink traffic of a bandwidth.

A method for grouping users by space division multiple access, the method comprising:

Receiving a sounding reference signal reported by at least two different user terminals;

Obtaining, according to the sounding reference signal, a channel estimation value of a channel where the user terminal is located;

Calculating, according to the obtained channel estimation value, a correlation value indicating a correlation between two different user terminals that send the sounding reference signal;

Determining whether to perform space division multiplexing on the data sent by the two different user terminals participating in the calculation according to the calculated correlation value.

A space division multiple access user grouping device, the device comprising:

a signal receiving module, configured to receive a sounding reference signal reported by at least two different user terminals;

a channel estimation value module, configured to acquire, according to the sounding reference signal, a channel estimation value of a channel where the user terminal is located;

a correlation value calculation module, configured to calculate, according to the obtained channel estimation value, a correlation value indicating a correlation between two different user terminals that send the sounding reference signal;

The determining module is configured to determine, according to the calculated correlation value, whether to perform space division multiplexing on data sent by the two different user terminals participating in the calculation.

A base station comprising the above-described space division multiple access user grouping device.

A storage medium is provided to store program code for performing various steps in a user grouping method of the above-described space division multiple access.

Other aspects will be apparent upon reading and understanding the drawings and detailed description.

BRIEF abstract

1 is a flowchart of a method of grouping users of space division multiple access according to an embodiment of the present disclosure;

2 is a flowchart of a method of grouping users of space division multiple access according to another embodiment of the present disclosure;

3 is a block diagram showing an exemplary structure of a spatial division multiple access user grouping apparatus according to an embodiment of the present disclosure;

4 is a block diagram showing an exemplary structure of a base station according to an embodiment of the present disclosure.

Detailed

The present disclosure will be described in detail below with reference to the accompanying drawings and embodiments. The exemplary embodiments described herein are merely illustrative of the disclosure and are not intended to limit the disclosure.

1 is a flowchart of a method for grouping users of spatial division multiple access according to an embodiment of the present disclosure. A method for grouping users of space division multiple access according to an embodiment of the present disclosure is described in detail below with reference to FIG. As shown, the user grouping method of the space division multiple access includes the following steps S101, S102, S103, and S104.

S101. Receive a sounding reference signal reported by at least two different user terminals.

The sounding reference signal (SRS) is used to estimate the uplink channel and provide reference for scheduling of the base station. The reference indicator is for reference to the uplink channel quality. In an LTE network, a base station eNodeB usually allocates a part of the system bandwidth to a specific user terminal, that is, allocates a specific frequency area resource to the user terminal at a specific time. At this time, if the base station eNodeB knows which part of the specific frequency area quality Preferably, the user terminal is preferentially allocated to ensure the service quality of the user terminal is more secure, and the sounding reference signal provides a data basis for the base station to determine the quality of the specific frequency region.

According to an example of the embodiment, the step S101 needs to receive the sounding reference signals reported by at least two different user terminals.

The configuration of the sounding reference signal SRS can refer to section 2.5.3 of Chapter 3 of the 3GPP protocol.

The step is to receive the sounding reference signal reported by the at least two user terminals through the uplink channel. The uplink channel is different from the downlink channel, and the uplink channel refers to a channel for establishing communication between the user terminal and the base station.

S102. Acquire, according to the sounding reference signal, a channel estimation value of a channel where the user terminal is located.

The channel estimation value is a frequency response of the estimated channel, and is a parameter standard for evaluating the channel quality. The channel estimation value can be obtained according to the subcarrier index carried in the sounding reference signal, the pilot sequence base sequence, and the signal data received by the local base station. According to the needs of each company, the channel estimation value can be obtained by various calculation methods at present.

The following uses the useful frequency domain data carried in the received sounding reference signal SRS as an example to describe the source of a channel estimation value. For example, the channel estimate of the least squares H _Ls channel is calculated by the following formula:

Where k is the SRS subcarrier index reported by the user terminal k, X(k) is the pilot sequence base sequence in which the user terminal is located, and Y(k) is the user terminal signal data received by the base station. The subcarrier index corresponds to the interpretation and definition of subcarrier (subcarrier frequency) in section 5.2.1 of 3GPP 36.211 protocol.

S103. Calculate, according to the obtained channel estimation value, a correlation value indicating a correlation between two different user terminals that send the sounding reference signal.

According to an example of the embodiment, calculating a correlation value indicating correlation between two different user terminals transmitting the sounding reference signal may be a representation of a product by calculating a product of channel estimation values of two different user terminals Correlation value between two different user terminals. The higher the correlation, the more likely it is to select the orthogonal codes that interfere with each other when spatially multiplexing the data sent by the two user terminals.

According to another example of the embodiment, the step further includes:

Calculating a correlation matrix C(i,j) between different user terminals according to the channel estimation value H of the user terminal (ie, the channel estimation value described above), wherein the calculation formula of the correlation values of the user terminal i and the user terminal j is:

C(i,j)=H _srs (i)*H _srs (j);

H _srs (i) represents the channel estimation value of user i, that is, the channel estimation value calculated by the above-described least squares H _Ls channel, and H _srs (j) represents the channel estimation value of user j.

S104. Determine, according to the calculated correlation value, whether to perform space division multiplexing on data sent by the two different user terminals participating in the calculation.

The determining, according to the calculated correlation value, whether to perform space division multiplexing on the data sent by the two different user terminals participating in the calculation is: when the correlation value is lower than a preset threshold, The data sent by the two different user terminals participating in the calculation is spatially multiplexed. Otherwise, the data sent by the two different user terminals participating in the calculation is not spatially multiplexed.

According to an example of the embodiment, the criterion of the correlation value may be divided into two segments, one segment being within the preset threshold range and the other segment being outside the preset range.

In order to improve the applicability of the correlation between the user terminals as the division criterion of space division multiplexing, the interval of the correlation value may be divided into three segments, that is, a preset first threshold range, a preset second threshold range, and A preset third threshold range. When the correlation between the two user terminals is in the preset first threshold range, it indicates that the correlation between the two user terminals is strong, and the data sent by the two user terminals is not suitable for space division multiplexing. When the correlation between the two user terminals is in the preset second threshold range, the data sent by the two user terminals may be selectively spatially multiplexed according to the user's needs, when the two user terminals are When the correlation between the two user terminals is in the preset third threshold range, it indicates that the correlation between the two user terminals is poor, and the data sent by the two user terminals must be spatially multiplexed.

According to another example of the embodiment, the first threshold range is, for example, 1 to 0.8, the second threshold range is, for example, 0.8 to 0.5, and the third threshold range is, for example, 0 to 0.5.

The user grouping method of the space division multiple access provided by the embodiment achieves the effect of improving the air separation traffic, improves the user experience, and effectively solves the problem that the traffic is reduced due to the high relevant user air separation.

2 is a flowchart of a method for grouping users of spatial division multiple access according to another embodiment of the present disclosure. The user grouping method of space division multiple access as shown in FIG. 2, the user terminal is configured to send the sounding reference signal. The time period, the method includes the above steps S102, S103 and S104, and the above step S101 is here step S201. among them:

S201. Receive, by using the time period, the sounding reference signals reported by the at least two different user terminals, and determine whether to perform space division multiplexing on the data sent by the two different user terminals participating in the calculation.

According to an example of the present embodiment, when an instruction to stop a loop is received (including but not limited to a power outage, a configuration command that receives a user input, an instruction to receive a stop loop of a user input, etc.), the loop of this step is stopped. operating.

In the 3GPP protocol rule, the SRS (Sounding Reference Signal) is the last symbol in a subframe, and the quality detection of the channel where the user terminal is located and the transmission of the uplink data are performed by periodically transmitting the sounding reference signal. Irrelevant, the base station can detect the correlation between different user terminals in real time, and perform real-time scheduling of space division multiplexing according to the correlation of real-time detection.

According to an example of the embodiment, the time period of receiving the sounding reference signal is, for example, 2 ms to 320 ms.

The process steps of the usage scenario of the user grouping method of the space division multiple access according to the embodiment are as follows:

Step 1: In the LTE system, performing channel estimation calculation for each terminal through data transmitted on the SRS channel, and acquiring channel estimation values;

Step 2: Perform correlation calculation between the two terminals by using the channel estimation value of each terminal;

Step 3: The relevance of the terminal is divided into segments according to relevant values;

Step 4: By judging which segment the correlation between the terminals belongs to, the terminal belonging to the lowest correlation segment is subjected to space division.

In this embodiment, by providing a looping step, the quality detection of the channel where the user terminal is located is independent of the transmission of the uplink data, so that the base station can detect the correlation between different user terminals in real time, and perform space division multiplexing according to the correlation of the real-time detection. Real-time scheduling.

3 is a block diagram showing an exemplary structure of a spatial division multiple access user grouping apparatus according to an embodiment of the present disclosure, and a spatial division multiple access user grouping apparatus according to an embodiment of the present disclosure, such as FIG. As shown in FIG. 3, the space division multiple access user grouping apparatus 10 includes:

The signal receiving module 11 is configured to receive the sounding reference signals reported by the at least two different user terminals;

The channel estimation value module 12 is configured to acquire, according to the sounding reference signal, a channel estimation value of a channel where the user terminal is located;

The correlation value calculation module 13 is configured to calculate, according to the obtained channel estimation value, a correlation value indicating a correlation between two different user terminals that send the sounding reference signal;

The determining module 14 is configured to determine, according to the calculated correlation value, whether to perform space division multiplexing on data sent by the two different user terminals participating in the calculation.

According to an example of the embodiment, the determining module is configured to perform space division multiplexing on data sent by the two different user terminals participating in the calculation when the correlation value is lower than a preset threshold, otherwise, the participation calculation is not performed. The data sent by the two different user terminals is spatially multiplexed.

The correlation value calculation module is configured to use the product of the channel estimation values of the two different user terminals as the correlation value.

According to an example of the embodiment, the correlation value calculation module is further configured to calculate a correlation matrix C(i,j) between different user terminals according to the channel estimation value H of the user terminal, wherein the user terminal i is related to the user terminal j The value is calculated as:

C(i,j)=H _srs (i)*H _srs (j);

H _srs (i) represents the i user channel estimation value, H _srs (j) represents a channel estimation value of the user j.

According to an example of the embodiment, the criterion of the correlation value may be divided into two segments, one segment being within the preset threshold range, and the correlation value indicating the correlation between two different user terminals is preset. Within the threshold range, the data sent by the two different user terminals participating in the calculation is spatially multiplexed, and the other segment is outside the preset range, when the correlation between the two different user terminals is high or low. When the value is outside the preset threshold range, the data sent by the two different user terminals participating in the calculation is not spatially multiplexed.

According to an example of the embodiment, the signal receiving module is configured to receive the sounding reference signals reported by the at least two user terminals through the uplink channel.

According to another example of the embodiment, the user terminal is configured with a time period for transmitting the sounding reference signal, and the user grouping device 10 of the space division multiple access further includes:

The loop module is configured to receive the sounding reference signal reported by the at least two different user terminals to jump to the signal receiving module, and determine whether the data sent by the two different user terminals participating in the calculation is null Sub-multiplexing.

In the 3GPP protocol rule, the SRS (Sounding Reference Signal) is the last symbol of a subframe. In this embodiment, by providing a loop module, the sounding reference signal is periodically transmitted, so that the channel of the user terminal is located. The quality detection is independent of the transmission of uplink data, so that the base station can detect the correlation between different user terminals in real time, and perform real-time scheduling of space division multiplexing according to the correlation of real-time detection.

4 is a block diagram showing an exemplary structure of a base station, such as the base station shown in FIG. 4, which includes the above-described spatial division multiple access user grouping device 10, in accordance with an embodiment of the present disclosure.

A storage medium according to this embodiment is provided, the storage medium being arranged to store program code for performing the following steps:

The storage medium is further configured to store program code for performing the following steps: when the correlation value is lower than a preset threshold, spatially multiplexing the data sent by the two different user terminals participating in the calculation; otherwise, The data sent by the two different user terminals participating in the calculation is not spatially multiplexed.

Wherein, the storage medium is further configured to store program code for performing the following steps:

The product of the channel estimation values of the two different user terminals is taken as the correlation value.

Receiving, by the at least two user terminals, the sounding reference signal reported by the uplink channel.

The user terminal is configured with a time period for transmitting the sounding reference signal, and the storage medium is configured to store program code for performing the following steps:

Each time interval is received, the sounding reference signals reported by at least two different user terminals are received, and it is determined whether data to be sent by the two different user terminals participating in the calculation is spatially multiplexed.

The embodiment of the present disclosure calculates the correlation between two different users, so that the base station can perform space division according to the correlation between the user terminals, and does not spatially multiplex the data sent by the highly relevant user terminal, but is related. The data transmitted by the less user terminal is spatially multiplexed, so that the base station does not cause the decoding error after the space division multiplexing due to the selection of the mutually orthogonal orthogonal codes by the user terminal with high correlation, thereby improving the effective determination of the bandwidth resources. Upstream traffic.

Those of ordinary skill in the art will appreciate that all or some of the steps, systems, and functional blocks/units of the methods disclosed above may be implemented as software, firmware, hardware, and suitable combinations thereof. In a hardware implementation, the division between functional modules/units mentioned in the above description does not necessarily correspond to the division of physical components; for example, one physical component may have multiple functions, or one function or step may be composed of several physical The components work together. Some or all of the components may be implemented as software executed by a processor, such as a digital signal processor or microprocessor, or as hardware, or as an integrated circuit, such as an application specific integrated circuit. Such software may be distributed on a computer readable medium, which may include computer storage media (or non-transitory media) and communication media (or transitory media). As is well known to those of ordinary skill in the art, the term computer storage medium includes volatile and nonvolatile, implemented in any method or technology for storing information, such as computer readable instructions, data structures, program modules or other data. Sex, removable and non-removable media. Computer storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, digital versatile disc (DVD) or other optical disc storage, magnetic cartridge, magnetic tape, magnetic disk storage or other magnetic storage device, or may Any other medium used to store the desired information and that can be accessed by the computer. Moreover, it is well known to those skilled in the art that communication media typically includes computer readable instructions, data structures, program modules, or other data in a modulated data signal, such as a carrier wave or other transport mechanism, and can include any information delivery media. .

The technical features of the above-described embodiments may be arbitrarily combined. For the sake of brevity of description, all possible combinations of the technical features in the above embodiments are not described. However, as long as there is no contradiction between the combinations of these technical features, All are considered to be within the scope of this specification.

The above-mentioned embodiments are merely illustrative of several embodiments of the present disclosure, and the description thereof is more specific and detailed, but is not to be construed as limiting the scope of the invention. It will be apparent to those skilled in the art that various changes and modifications may be made without departing from the scope of the present disclosure. Therefore, the scope of the invention should be determined by the appended claims.

Claims

A user grouping method for space division multiple access, comprising:

Receiving a sounding reference signal reported by at least two different user terminals;

Obtaining, according to the sounding reference signal, a channel estimation value of a channel where the user terminal is located;

Calculating, according to the obtained channel estimation value, a correlation value indicating a correlation between two different user terminals that send the sounding reference signal;

Determining whether to perform space division multiplexing on the data sent by the two different user terminals participating in the calculation according to the calculated correlation value.
The method according to claim 1, wherein the calculating, according to the obtained channel estimation value, the correlation value indicating the correlation between two different user terminals transmitting the sounding reference signal comprises:

The product of the channel estimation values of the two different user terminals is taken as the correlation value.
The method of claim 1, wherein the step of receiving the sounding reference signals reported by the at least two different user terminals is:

Receiving a sounding reference signal reported by at least two different user terminals through an uplink channel.
The method according to claim 1, wherein the step of determining, according to the calculated correlation value, whether to spatially multiplex data transmitted by the two different user terminals participating in the calculation is:

When the correlation value is lower than the preset threshold, the data sent by the two different user terminals participating in the calculation is spatially multiplexed, otherwise, the data sent by the two different user terminals participating in the calculation is not performed. Space division multiplexing.
The method according to any one of claims 1 to 4, wherein the user terminal is configured with a time period for transmitting the sounding reference signal; the method further comprises:

And detecting the sounding reference signals reported by the at least two different user terminals, and determining whether to perform spatial division multiplexing on the data sent by the two different user terminals participating in the calculation according to the calculated correlation value.
A user grouping device for space division multiple access, comprising:

a signal receiving module, configured to receive a sounding reference signal reported by at least two different user terminals;

a channel estimation value module, configured to acquire, according to the sounding reference signal, a channel estimation value of a channel where the user terminal is located;

a correlation value calculation module, configured to calculate, according to the obtained channel estimation value, a correlation value indicating a correlation between two different user terminals that send the sounding reference signal;

The determining module determines, according to the calculated correlation value, whether to perform space division multiplexing on data sent by the two different user terminals participating in the calculation.
The apparatus of claim 6, wherein the correlation value calculation module is configured to use a product of channel estimation values of the two different user terminals as the correlation value.
The device according to claim 6 or 7, wherein the user terminal is configured with a time period for transmitting the sounding reference signal; the device further comprises:

The looping module is configured to receive the sounding reference signals reported by the at least two different user terminals, and determine whether to perform spatial division multiplexing on the data sent by the two different user terminals participating in the calculation.
A base station, wherein the base station comprises the apparatus of any one of the preceding claims 6 to 8.
A storage medium, wherein the storage medium is arranged to store program code for performing the steps of the method of any of the preceding claims 1 to 5.