WO2014146301A1

WO2014146301A1 - Terminal location detection method and apparatus

Info

Publication number: WO2014146301A1
Application number: PCT/CN2013/073084
Authority: WO
Inventors: 杨晶; 沈乐乐
Original assignee: 华为技术有限公司
Priority date: 2013-03-22
Filing date: 2013-03-22
Publication date: 2014-09-25
Also published as: CN103718587A

Abstract

Embodiments of the present invention provide a terminal location detection method and apparatus, and relate to the technical field of wireless communications. The method comprises: sending data to a to-be-detected terminal in each preset time period by using one beam of multiple beams existing in a cell, and receiving downlink information that is returned by the to-be-detected terminal according to data sent by using each beam (101); obtaining a modulation coding scheme (MCS) modified value of the to-be-detected terminal in each preset time period according to the received downlink information returned by the to-be-detected terminal (102); and determining a location of the to-be-detected terminal according to the MCS modified value of the to-be-detected terminal in each preset time period (103). By means of the method according to the present invention, a terminal location is detected by using downlink information, so that a detection result is more accurate.

Description

Method and device for detecting terminal position

The present invention relates to the field of wireless communication technologies, and in particular, to a method and apparatus for detecting a location of a terminal. Background technique

With the rapid development of wireless communication technologies, the number of terminals has proliferated, and the number of base stations has also increased significantly. The coverage of a base station is usually referred to as a cell. Under the condition that the current frequency resources are limited, many cells share the same frequency resource. Since the same frequency resource is used, co-channel interference occurs between different cells. Usually, suppressing co-channel interference divides a cell into multiple sectors, but this causes terminals at the sector boundary to be interfered by sectors. In order for the terminal to accurately receive data, the terminal at the sector boundary is combined with the adjacent sector to transmit data for the terminal; for the terminal in the sector, the sector is used to transmit data for the terminal. Therefore, how to detect the location of the terminal to determine which sector or sectors to send data to the terminal becomes a key issue.

In the prior art, the base station determines the location of the terminal by retrieving the uplink signal of a certain terminal, and the specific determining process is: if multiple sectors simultaneously retrieve the uplink signal of the terminal, and the received power difference between the sectors is If the threshold is less than the preset threshold, it is determined that the terminal is at the sector boundary; if only one sector retrieves the uplink signal of the terminal, or although multiple sectors retrieve the uplink signal of the terminal, the received power between the sectors If the difference is greater than the preset threshold, it is determined that the terminal is in the sector with the largest received power.

In the process of implementing the present invention, the inventors have found that the prior art has at least the following problems: Since the fading of the uplink and downlink channels is unbalanced, there is a problem that the base station determines that the position accuracy of the terminal is not high according to the uplink signal of the terminal. Summary of the invention

In order to solve the problems existing in the prior art, embodiments of the present invention provide a method and apparatus for detecting a location of a terminal. The technical solution is as follows: The first aspect provides a method for detecting a location of a terminal, where the method uses: one of a plurality of beams existing in a cell to be used to detect a final message in each preset time period; ''', - , Obtaining, according to the received downlink information returned by the to-be-detected terminal, an MCS (Modulation and Coding Scheme) correction value of the to-be-detected terminal in each preset time period;

Determining a location of the to-be-detected terminal according to an MCS correction value of the to-be-detected terminal in each preset time period.

In a first possible implementation manner of the first aspect, the receiving the downlink information returned by the to-be-detected terminal according to the data sent by each beam includes:

And receiving downlink information corresponding to the data sent by the any beam returned by the to-be-detected terminal according to the data sent by the any one of the beams, where the downlink information includes a CQI (Channel Qua lity) Indi ca tor, a channel quality indicator) value and a NACK (Negative Acknowledgement)/ACK (Acknowledgement) message; the acquiring the to-be-detected according to the received downlink information returned by the to-be-detected terminal The MCS correction value of the terminal in each preset time period includes:

For any preset time period, the NACK/ACK message corresponding to the data sent by the beam used by the to-be-detected terminal and used by any of the preset time periods is used by any of the preset time periods. The MCS value of the to-be-detected terminal in the any preset time period is calculated by the corresponding CQI value of the data transmitted by the beam, and the MCS value of the any preset time period is corrected to obtain the MCS correction value.

With reference to the first aspect, in a second possible implementation manner, if two beams exist in the cell and two MCS correction values are obtained, the terminal according to the to-be-detected terminal is in each preset time period. The MCS correction value determines the location of the terminal to be detected, including:

Obtaining a difference between the two MCS correction values, and comparing the absolute value of the difference with the first preset threshold;

If the absolute value of the difference is less than the first preset threshold, determining that the to-be-detected terminal is located in a common coverage area of the two beams;

And if the absolute value of the difference is greater than the first preset threshold, determining that the to-be-detected terminal is located in a coverage area of a beam with a large MCS correction value.

In combination with the first aspect, in a third possible implementation, if there are two waves in the cell Beaming, and using two beams existing in the cell within a preset time period, the data is sent to the detecting terminal, and the two beams existing in the cell are used together in the next preset time period. Sending data to the to-be-detected terminal, acquiring two MCS correction values; the location of the terminal, including:

Obtaining a difference between the two MCS correction values, and comparing the difference with the second preset threshold and the third preset threshold, where the first preset threshold is smaller than the second preset threshold;

If the difference is greater than the second preset threshold and less than the third preset threshold, determining that the to-be-detected terminal is located in a common coverage area of the two beams;

If the difference is greater than the third preset threshold, determining that the to-be-detected terminal is located in a coverage area of a beam that does not separately transmit data to the to-be-detected terminal;

And if the difference is smaller than the second preset threshold, determining that the to-be-detected terminal is located in a coverage area of a beam that separately transmits data to the to-be-detected terminal.

In combination with the first aspect or the first possible implementation of the first aspect or the second possible implementation of the first aspect or the third possible implementation of the first aspect, in a fourth possible implementation Before using the one of the plurality of beams existing in the cell to send data to the to-be-detected terminal in each preset time period, the method further includes:

The uplink signal of each terminal in the cell is retrieved, and the terminal whose power difference corresponding to the uplink signal is less than a preset threshold is determined as the terminal to be detected.

In a second aspect, there is also provided a device for detecting a position of a terminal, the device comprising:

a sending module, configured to use, in each preset time period, one of a plurality of beams existing in the cell to send data to the terminal to be detected; information;

An acquiring module, configured to obtain, according to the downlink information returned by the to-be-detected terminal received by the receiving module, an MCS correction value of the to-be-detected terminal in each preset time period;

And a determining module, configured to determine a location of the to-be-detected terminal according to the MCS correction value of the to-be-detected terminal acquired by the acquiring module in each preset time period.

In a first possible implementation manner of the second aspect, the receiving module is configured to receive data that is sent by any one of the beams, and receive the data that is sent by the to-be-detected terminal according to the any one of the beams. Downlink information corresponding to data transmitted by one beam, the downlink information includes CQI value and NACK/ ACK message;

The obtaining module is configured to: according to the NACK/ACK message pair corresponding to the data sent by the to-be-detected terminal and the beam used by the any one of the preset time periods, for any preset time period Calculating the MCS value of the to-be-detected terminal in any one of the preset time periods, and calculating the MCS value of the any preset time period, corresponding to the CQI value of the data sent by the beam used by any preset time period. Make corrections to get a positive MCS value.

With reference to the second aspect, in a second possible implementation, if there are two beams in the cell, the determining module includes:

a comparison unit, configured to obtain a difference between the two MCS correction values and the two MCS correction values, and compare the absolute value of the difference with the first preset threshold;

a first determining unit, configured to: if the comparing unit compares that the absolute value of the difference is smaller than the first preset threshold, determining that the to-be-detected terminal is located in a common coverage area of the two beams; And a determining unit, configured to determine, if the comparing unit compares that the absolute value of the difference is greater than the first preset threshold, determining that the to-be-detected terminal is located in a coverage area of a beam with a large MCS correction value.

With reference to the second aspect, in a third possible implementation, if there are two beams in the cell, the sending module is further configured to use two existing cells in the cell in a preset time period. Sending data to the to-be-detected terminal by using one beam in the beam, and transmitting data to the to-be-detected terminal by using two beams existing in the cell in a next preset time period;

The determining module further includes:

The comparison unit is further configured to obtain a difference between the two MCS correction values and the two MCS correction values, and compare the difference values with the second preset threshold value and the third preset threshold value, where the first preset is The threshold is less than the second preset threshold;

The first determining unit is further configured to: if the comparing unit compares that the difference is greater than the second preset threshold and is smaller than the third preset threshold, determining that the to-be-detected terminal is located in the two beams Common coverage area;

The second determining unit is further configured to: if the comparing unit compares that the difference is greater than the third preset threshold, determine that the to-be-detected terminal is located in a coverage of a beam that does not separately send data to the to-be-detected terminal. Area

And a third determining unit, configured to determine, if the comparing unit compares that the difference is smaller than the second preset threshold, that the to-be-detected terminal is located in a coverage area of a beam that separately transmits data to the to-be-detected terminal. In conjunction with the second aspect or the first possible implementation of the second aspect, or a possible implementation of the fourth or second aspect, or a third possible implementation of the second aspect, in a fourth possible implementation In the mode, the device further includes:

The search module is configured to retrieve an uplink signal of each terminal in the cell, and determine, as the to-be-detected terminal, a terminal whose power difference corresponding to the uplink signal is less than a preset threshold.

The beneficial effects of the technical solutions provided by the embodiments of the present invention are:

The invention sends data to the to-be-detected terminal by using one of the plurality of beams existing in the cell in each preset time period, and acquires the to-be-detected terminal in each preset time period according to the downlink information returned by the terminal to be detected. After the MCS correction value, the position of the terminal to be detected is determined according to the MCS correction value, and the downlink information is used to detect the position of the terminal. Since the MCS correction value can reflect the characteristics of the downlink channel, the detection result is more accurate. DRAWINGS

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below. It is obvious that the drawings in the following description are only some embodiments of the present invention. Other drawings may also be obtained from those of ordinary skill in the art in light of the inventive work.

1 is a flowchart of a method for detecting a location of a terminal according to Embodiment 1 of the present invention;

2 is a flowchart of a method for detecting a location of a terminal according to Embodiment 2 of the present invention;

3 is a schematic structural diagram of an apparatus for detecting a position of a terminal according to Embodiment 3 of the present invention; FIG. 4 is a schematic diagram of an internal structure of a determining module according to Embodiment 3 of the present invention;

FIG. 5 is a schematic diagram showing the internal structure of another determining module according to Embodiment 3 of the present invention; FIG. 6 is a schematic structural diagram of an apparatus for detecting the position of a terminal according to Embodiment 3 of the present invention. Detailed ways

The embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

Embodiment 1

When a plurality of cells share the same frequency resource, and the adjacent sector or the virtual sector is used to jointly send data to the user at the junction, in order to determine the location of the terminal, the embodiment provides a method for detecting the location of the terminal, see Figure 1. The method flow includes: Step 101: Using multiple waves existing in the cell in each preset time period to complete the information;

Further, before using one of the plurality of beams existing in the cell to send data to the to-be-detected terminal in each preset time period, the method further includes:

The uplink signal of each terminal in the cell is retrieved, and the terminal whose power difference corresponding to the uplink signal is less than the preset threshold is determined as the terminal to be detected.

Step 102: Acquire, according to the received downlink information returned by the terminal to be detected, the MCS correction value of the terminal to be detected in each preset time period; but not limited to:

For the data sent by any beam, the downlink information corresponding to the data sent by any beam returned by the terminal to be detected according to the data transmitted by any beam is received, and the downlink information includes a CQI value and a NACK/ACK message;

Obtaining the MCS correction value of the to-be-detected terminal in each preset time period according to the received downlink information returned by the terminal to be detected, including but not limited to:

For any preset time period, the NACK/ACK message corresponding to the data sent by the beam used by the terminal to be detected and the beam used by any preset time period is compared with the data sent by the beam used in any preset time period. The corresponding CQI value is used to calculate the MCS value of the terminal to be detected in any preset time period, and the MCS value of any preset time period is corrected to obtain the MCS correction value.

Step 103: Determine the location of the terminal to be detected according to the MCS correction value of the terminal to be detected in each preset time period.

Further, if there are two beams in the cell and two MCS correction values are obtained, the location of the terminal to be detected is determined according to the MCS correction value of the terminal to be detected in each preset time period, including but not limited to:

Obtaining a difference between the two MCS correction values, and comparing the absolute value of the difference with the first preset threshold; if the absolute value of the difference is smaller than the first preset threshold, determining that the to-be-detected terminal is located in the common coverage of the two beams Area

If the absolute value of the difference is greater than the first preset threshold, it is determined that the to-be-detected terminal is located in a coverage area of the beam with a large MCS correction value.

Further, if there are two beams in the cell, and the intra-cell is used within a preset time period One of the two existing beams transmits data to the terminal to be detected, and two beams existing in the cell are used to transmit data to the terminal to be detected, and two MCS correction values are acquired;

Determining the location of the terminal to be detected according to the MCS correction value of the terminal to be detected in each preset time period, including but not limited to:

And obtaining a difference between the two MCS correction values, and comparing the difference with the second preset threshold and the third preset threshold, where the first preset threshold is smaller than the second preset threshold;

If the difference is less than the second preset threshold, it is determined that the to-be-detected terminal is located in a coverage area of the beam that separately transmits data to the terminal to be detected.

The method provided in this embodiment sends data to the to-be-detected terminal by using one of the plurality of beams existing in the cell in each preset time period, and acquires the to-be-detected terminal according to the downlink information returned by the to-be-detected terminal. After the MCS correction value of the preset time period, the position of the terminal to be detected is determined according to the MCS correction value, and the downlink information is used to detect the position of the terminal. Since the MCS correction value can reflect the characteristics of the downlink channel, the detection result is more accurate. Embodiment 2

The embodiment of the present invention provides a method for detecting a location of a terminal. In combination with the content of the first embodiment, referring to FIG. 2, the method process provided by this embodiment includes:

Step 201: Search for an uplink signal of each terminal in the cell, and determine, as the terminal to be detected, a terminal whose power difference corresponding to the uplink signal is less than a preset threshold;

For this step, if multiple beams existing in the cell can simultaneously retrieve the uplink signal of a certain terminal in the cell, compare the received power of each beam receiving the uplink signal of the terminal, if each beam If the received power difference of the uplink signal of the terminal is less than the preset threshold, the terminal is determined as the terminal to be detected, and the location of the terminal to be detected is further accurately determined according to the following steps 202 to 204. The present embodiment does not limit the number of terminals to be detected. In addition, the size of the preset threshold may be 15 decibels. Of course, the size of the preset threshold may be other values than the above values, for example, 20 decibels, etc., in this embodiment, the size of the preset threshold is not advanced. The line is specifically limited.

For example, there are two beams in the cell S, which are beam A and beam B respectively. If beam A and beam B can both detect the uplink signal of a certain terminal M in the cell S, and the uplink of the beam A to the terminal M The received power of the signal is P _A , and the received power of the uplink signal of the beam B to the terminal M is P _B . If the difference between P _A and P _B is less than the preset threshold P, for example, P is 15 dB, the terminal M is If the difference between P _A and P _B is greater than the preset threshold P, it is directly determined that the terminal M is in the coverage of the beam whose receiving power is large.

Step 202: Use one beam direction information in multiple beams existing in the cell in each preset time period;

For the step, the duration of the preset time period may be 15 minutes. Of course, the duration of the preset time period may be other values than the above values, for example, 20 minutes, etc., this embodiment No specific limitation. But not limited to:

For the data sent by any beam, the downlink information corresponding to the data sent by any beam returned by the terminal to be detected according to the data transmitted by any beam is received, and the downlink information includes a CQI value and a NACK/ACK message.

It should be noted that, in addition to the CQI value and the NACK/ACK message, the downlink information may include other information, for example, the block error rate of the data to be sent by the terminal to be detected by any of the beams, and the downlink information included in the embodiment is included in the downlink information. The content is not specifically limited.

For example, there are two beams in the cell S, which are beam A and beam B respectively. The preset time period is 15 minutes. In the time range from 10:00 to 1 0:15 in the morning, the beam can be used uniformly. A sends data to the N to-be-detected terminals in the cell S, and receives N downlink information returned by the N to-be-detected terminals according to the data sent by the beam A; and in the time period of 10:15 to 10:30 am The beam B can be uniformly used to transmit data to the N to-be-detected terminals in the cell S, and receive N downlink information returned by the N to-be-detected terminals according to the data sent by the beam B.

Step 203: Acquire an MCS correction value of the to-be-detected terminal in each preset time period according to the received downlink information returned by the terminal to be detected.

Specifically, the MCS correction value of the to-be-detected terminal in each preset time period is obtained according to the received downlink information returned by the terminal to be detected, including but not limited to: For any preset time period, according to the NACK/ACK message corresponding to the data sent by any of the pre-instrument/receivers returned by the terminal to be detected and the beam used for any preset time period The corresponding CQI value of the data is used to calculate the MCS value of the terminal to be detected in any preset time period, and the MCS value of any preset time period is corrected to obtain the MCS correction value.

The MCS value can be modified by the 0LLA (Outer Loop L Ink Adaptation) algorithm. The basic idea of the 0LLA algorithm is to set a MCS compensation step.

A _0L , when an ACK message is received, Δ. _£ minus a lower step size Δ _β plus Δ _£ plus an upper step Δ when a NACK message is received. The correction formula is as follows:

MCS _eff = min{ C5 _max , MCS _comp } ( 1 )

MCS _comp = m _ax {M^ , [MCS _rep - A ₀ ( 2 ) 申, Δ _{0 £} = _{down OL} = -A _{up It} should be noted that MC^p is the beam used in any preset time period. The MCS value corresponding to the transmitted data, MC ^ is the MCS value adjusted according to the upper step or the lower step, and MCS _eff is the obtained MCS correction value.

Intuitively, the idea of the 0LLA algorithm is that when the ACK message is received continuously, the current channel quality is better, and the MCS can be improved. When the NACK message is received, the current channel quality is poor, and the MCS needs to be lowered. In general, the relationship between eight and eight ^ and the initial BLER (Block Error Rat io) is as follows:

1 - BLER ί

Down up BI ^R The above process is described in detail with a specific example.

For example, in the period from 10: 00 to 10:15 in the morning, the beam A is uniformly used to transmit data to all the to-be-detected terminals in the cell S, and then a certain detected terminal M in the cell S is transmitted on the received beam A. After the data, the CQI value and the generated NACK/ACK message can be calculated according to the reception condition of the data, and the CQI value and the generated NACK/ACK message are returned to the base station. After receiving the CQI value and the NACK/ACK message returned by the terminal M to be detected, the base station calculates the MCS value according to the CQI value, and calculates the MCS correction value by using equations (1) and (2), that is, calculates the terminal to be detected. The MCS value of M in the period from 10: 00 to 10:15 in the morning, that is, the MCS value corresponding to the data transmitted by the beam A is obtained. Step 204: According to the MCS of the terminal to be detected in each preset time period, the position of the pull end is performed.

For this step, taking two beams in the cell as an example, one of the two beams existing in the cell may be used to send data to the to-be-detected terminal within a preset time period, in the next preset time period. Using the other one of the two beams existing in the cell to send data to the terminal to be detected, the base station can calculate two MCS values by using the downlink information sent by the terminal to be detected to the base station, and then obtain two MCS correction values. Determining the location of the terminal to be detected according to the MCS correction value of the terminal to be detected in each preset time period, including but not limited to:

For example, there are two beams in the cell S, which are beam A and beam B respectively, and the MCS correction corresponding to a data to be detected in the cell S corresponding to the data transmitted by using the beam A in a predetermined period of time The value is a, and the MCS corresponding to the data sent by the beam B in another preset time period is b. The first preset threshold is T1. If | ab | <Tl, then it is determined. The terminal M to be detected is located in the common coverage area of the beam A and the beam B. If ab>T1, it is determined that the terminal M to be detected is located in the coverage area of the beam A; if ab<-T1, it is determined that the terminal to be detected is located in the coverage of the beam Β region.

Assuming that a=10, b=8, Tl=5, since I a_b I =2<Τ1=5, it is determined that the terminal to be detected is located in the common coverage area of the beam 波束 and the beam ;;

a=10, b=3, Tl=5, then a_b=7>Tl=5, so it is determined that the terminal to be detected is located in the coverage area of the beam ;;

Assuming a=2, b=10, Tl=5, since a-b=-8<-Tl=-5, it is determined that the terminal M to be detected is located in the coverage area of the beam B.

It should be noted that the size of the first preset threshold may be other than the value 5, for example, 2 or 4, etc., and the size of the first threshold is not specifically limited in this embodiment.

In addition to the foregoing manner of determining the location of the terminal to be detected, for the case where two beams are present in the cell, one of the two beams existing in the cell may be used to transmit data to the terminal to be detected within a preset time period. , using two beams existing in the cell in the next preset time period In the manner that the data is sent to the terminal to be detected, the base station can calculate two MCS values by using the terminal to be detected to the base % and f T1 & , and then obtain two MCS correction values; according to the terminal to be detected, each preset time period When the MCS correction value determines the location of the terminal to be detected, the following manner may be adopted: obtaining the difference between the two MCS correction values, and comparing the difference with the second preset threshold and the third preset threshold respectively, the first pre- Setting the threshold to be smaller than the second preset threshold;

For example, there are two beams in the cell S, which are beam A and beam B respectively, and the MCS value corresponding to a data to be detected by the terminal M in the cell S and the data transmitted by using the beam A in a predetermined period of time. For a, the terminal M corresponds to the data sent by the beam A and the beam B in another preset time period, and the MCS value is b, the second preset threshold is T2, and the third preset threshold is T3, and T2 <T3 is taken as an example, if T2<ba<T3, it is determined that the terminal M to be detected is located in the common coverage area of the beam A and the beam B; if ba>T3, it is determined that the terminal M to be detected is located in the coverage area of the beam B; <T2, it is determined that the terminal M to be detected is located in the coverage area of the beam A.

Assuming that a=7, b=10, T2=2, Τ2=4, since T2=2<b_a=3<T3=4, it is determined that the terminal M to be detected is located in the common coverage area of beam A and beam B;

a=3, b=10, T3=4, then b_a=7>T3=4, so it is determined that the terminal to be detected is located in the coverage area of the beam ;;

a=9 , b=10 , T2=2 , then since b-a=l<T2=2, it is determined that the terminal to be detected is located in the coverage area of the beam Α.

It should be noted that, if the total transmit power is W, when the data is transmitted to the terminal M to be detected only by the beam A, the transmit power is W/2; when the beam A and the beam B are jointly sent to the terminal M to be detected, The transmit power is W, and the transmit powers of the beam A and the beam B are each W/2; further, the second preset threshold may be other values than the above-mentioned value 2, for example, 1 or 3, etc. In this embodiment, the size of the first threshold is not specifically limited; the size of the third preset threshold may be other values, for example, 5 or 6, etc., and the size of the third threshold in this embodiment. The same is not specifically limited. For the case where there are three beams in the cell S, the three beams are respectively cut by A, β and beam C, and are sent to a certain terminal to be detected in the cell S and used in a predetermined period of time. The MCS value corresponding to the data is MCS1, the MCS value corresponding to the data sent by the terminal B using the beam B in another preset time period is MCS2, and the terminal M uses the beam C in some other preset time period. The MCS value corresponding to the transmitted data is MCS3. When determining the location of the terminal M, 4 sets the preset threshold to Th1, then if | MCS1_MCS2 | <= Thl , and | MCS2_MCS3 | <= Thl , the terminal M to be detected a common coverage area of beam A, beam B, and beam C; if I MCS1-MCS2 | <=Thl , and I MCS2-MCS3 I >Thl , the terminal M to be detected is located in the common coverage area of beam A and beam B; MCS2-MCS3 | <=Thl , and | MCS1- MCS2 | >Thl , the terminal M to be detected is located in the common coverage area of beam B and beam C; if MCS1-MCS2>Thl and MCS2-MCS3>Thl, then The detecting terminal M is located in the coverage area of the beam A; if MCS1_MCS2<_Thl, and (MCS3-MCS2) >Thl, the to-be-checked The terminal M is located in the coverage area of the beam C. If MCS1-MCS2<- Thl, and MCS2-MCS3>Thl, the terminal M to be detected is located in the coverage area of the beam B.

For the case where there are more beams in the cell, the method for determining the location of the terminal to be detected is the same as the above-mentioned principle, and is not described here. The method for detecting the location of the terminal provided in this embodiment may be applied not only in the cell but also between virtual cells in different sectors and in a certain cell in the cell. The specific application scenario may be determined according to a specific situation.

The method provided in this embodiment sends data to the to-be-detected terminal by using one of the plurality of beams existing in the cell in each preset time period, and acquires the to-be-detected terminal according to the downlink information returned by the to-be-detected terminal. After the MCS correction value of the preset time period, the position of the terminal to be detected is determined according to the MCS correction value, and the downlink information is used to detect the position of the terminal. Since the MCS correction value can reflect the characteristics of the downlink channel, the detection result is more accurate. Embodiment 3

An embodiment of the present invention provides a device for detecting a location of a terminal, which is used to perform the method provided by the foregoing embodiment and the second embodiment. Referring to FIG. 3, the device includes:

The sending module 31 is configured to send, by using one of a plurality of beams existing in the cell, data to the to-be-detected terminal in each preset time period;

The obtaining module 33 is configured to use the downlink information returned by the terminal to be detected received by the receiving module 32. Obtaining an MCS correction value of the terminal to be detected in each preset time period;

The determining module 34 is configured to determine, according to the MCS correction value of the to-be-detected terminal acquired by the acquiring module 33 in each preset time period, the location of the terminal to be detected.

Further, the receiving module 32 is configured to receive, for data sent by any beam, downlink information corresponding to data sent by any beam returned by the to-be-detected terminal according to data sent by any beam, where the downlink information includes a CQI value and a NACK. / ACK message;

The obtaining module 33 is configured to use, according to the data sent by the to-be-detected terminal, the NACK/ACK message corresponding to the data sent by the beam used in any preset time period, and any preset time period, for any preset time period. Calculate the MCS value of the terminal to be detected in any preset time period according to the CQI value corresponding to the data sent by the beam, and correct the MCS value of any preset time period to obtain the MCS correction value.

Further, referring to FIG. 4, if there are two beams in the cell, the determining module 34 includes: a comparing unit 341, configured to acquire the difference between the two MCS correction values and the two MCS correction values, and the absolute value of the difference The value is compared with the first preset threshold;

The first determining unit 342 is configured to determine, if the comparison unit 341 compares the absolute value of the difference that is smaller than the first preset threshold, that the terminal to be detected is located in a common coverage area of the two beams;

The second determining unit 343 is configured to determine, if the comparison unit 341 compares the absolute value of the difference value, that the absolute value of the difference is greater than the first preset threshold, determine that the to-be-detected terminal is located in a coverage area of the beam with a large MCS correction value.

Further, referring to FIG. 5, if there are two beams in the cell, the sending module 31 is further configured to use one of the two beams existing in the cell to send data to the to-be-detected terminal within a preset time period. The two beams existing in the cell are used to send data to the terminal to be detected in a preset time period;

The determining module 34 further includes:

The comparing unit 341 is further configured to obtain a difference between the two MCS correction values and the two MCS correction values, and compare the difference values with the second preset threshold value and the third preset threshold value, where the first preset threshold value is smaller than the first Two preset thresholds;

The first determining unit 342 is further configured to: if the comparison unit 341 compares the difference is greater than the second preset threshold and is less than the third preset threshold, determining that the to-be-detected terminal is located in a common coverage area of the two beams; the second determining unit 343 And determining, if the comparison unit 341 compares the difference value to be greater than the third preset threshold, determining that the to-be-detected terminal is located in a coverage area of a beam that does not separately transmit data to the to-be-detected terminal; and third determining unit 344 is configured to compare the unit 341: Comparing the difference is smaller than the second preset threshold, determining that the to-be-detected terminal is located in a coverage area of the beam that separately transmits data to the to-be-detected terminal. Further, referring to FIG. 6, the device further includes:

The search module 35 is configured to retrieve an uplink signal of each terminal in the cell, and determine, as the terminal to be detected, a terminal whose power difference corresponding to the uplink signal is less than a preset threshold.

The device provided in this embodiment sends data to the to-be-detected terminal by using one of the plurality of beams existing in the cell in each preset time period, and acquires the to-be-detected terminal according to the downlink information returned by the terminal to be detected. After the MCS correction value of the preset time period, the position of the terminal to be detected is determined according to the MCS correction value, and the downlink information is used to detect the position of the terminal. Since the MCS correction value can reflect the characteristics of the downlink channel, the detection result is more accurate. Embodiment 4

A device for detecting a location of a terminal, the device comprising a memory and a processor;

a processor, configured to use one of a plurality of beams existing in the cell to transmit data to the to-be-detected terminal in each preset time period, and receive downlink information returned by the to-be-detected terminal according to the data sent by each beam; The downlink information returned by the terminal to be detected obtains the MCS correction value of the terminal to be detected in each preset time period; and determines the location of the terminal to be detected according to the MCS correction value of the terminal to be detected in each preset time period.

Further, the processor is specifically configured to receive downlink information corresponding to data sent by any beam returned by the to-be-detected terminal according to data sent by any beam, and the downlink information includes a CQI value and NACK/ACK message; for any preset time period, according to the NACK/ACK message corresponding to the data sent by the beam to be used by the terminal to be detected for any preset time period and any preset time period Calculate the MCS value of the terminal to be detected in any preset time period according to the CQI value corresponding to the data sent by the beam, and correct the MCS value of any preset time period to obtain the MCS correction value.

Further, the processor is specifically configured to: if two beams exist in the cell, obtain a difference between the two MCS correction values and the two MCS correction values, and compare the absolute value of the difference with the first preset threshold; If the absolute value of the difference is less than the first preset threshold, determining that the terminal to be detected is located in the common coverage area of the two beams; if the absolute value of the difference is greater than the first preset threshold, determining that the terminal to be detected is located at the MCS correction value The coverage area of the beam.

Further, the processor is specifically configured to: if there are two beams in the cell, and in a preset In the time period, one of the two beams existing in the cell is used to be detected, and two beams existing in the cell are used to transmit data to the terminal to be detected in the next preset time period, and two MCS correction values are obtained. The difference between the two MCS correction values is compared with the second preset threshold and the third preset threshold respectively, where the first preset threshold is smaller than the second preset threshold; if the difference is greater than the second preset threshold If the value is smaller than the third preset threshold, it is determined that the to-be-detected terminal is located in the common coverage area of the two beams; if the difference is greater than the third preset threshold, determining that the to-be-detected terminal is located in the coverage of the beam that does not separately send data to the to-be-detected terminal If the difference is smaller than the second preset threshold, it is determined that the to-be-detected terminal is located in a coverage area of the beam that separately transmits data to the terminal to be detected.

Further, the processor is further configured to: retrieve an uplink signal of each terminal in the cell, and determine, as the terminal to be detected, a terminal whose power difference corresponding to the uplink signal is less than a preset threshold.

The device provided in this embodiment sends data to the to-be-detected terminal by using one of the plurality of beams existing in the cell in each preset time period, and acquires the to-be-detected terminal according to the downlink information returned by the to-be-detected terminal. After the MCS correction value of the preset time period, the position of the terminal to be detected is determined according to the MCS correction value, and the downlink information is used to detect the position of the terminal. Since the MCS correction value can reflect the characteristics of the downlink channel, the detection result is more accurate. It should be noted that: the device and the device for detecting the location of the terminal provided by the foregoing embodiment are only illustrated by the division of the foregoing functional modules when detecting the location of the terminal. In actual applications, the functions may be assigned differently according to requirements. The function module is completed, that is, the internal structure of the device and the device are divided into different functional modules to complete all or part of the functions described above. In addition, the device and the device for detecting the location of the terminal provided by the foregoing embodiment are in the same configuration as the method for detecting the location of the terminal. For the specific implementation process, refer to the method embodiment, and details are not described herein again.

The serial numbers of the embodiments of the present invention are merely for the description, and do not represent the advantages and disadvantages of the embodiments.

A person skilled in the art may understand that all or part of the steps of implementing the above embodiments may be completed by hardware, or may be instructed by a program to execute related hardware, and the program may be stored in a computer readable storage medium. The storage medium mentioned may be a read only memory, a magnetic disk or an optical disk or the like.

The above is only the preferred embodiment of the present invention, and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., which are within the spirit and scope of the present invention, should be included in the protection of the present invention. Within the scope.

Claims

claims

1. A method for detecting the location of a terminal, characterized in that the method includes:

In each preset time period, one beam among multiple beams existing in the cell is used to obtain the terminal to be detected in each preset time period based on the received downlink information returned by the terminal to be detected. Coding modulation method MCS correction value;

The location of the terminal to be detected is determined based on the MCS correction value of the terminal to be detected in each preset time period.

2. The method according to claim 1, wherein the receiving the downlink information returned by the terminal to be detected based on the data sent by each beam includes:

For data sent by any beam, receive downlink information corresponding to the data sent by any beam returned by the terminal to be detected according to the data sent by any beam, where the downlink information includes a channel quality indication CQI value and negative acknowledgment NACK/positive acknowledgment ACK message;

Obtaining the coding and modulation mode MCS correction value of the terminal to be detected in each preset time period based on the received downlink information returned by the terminal to be detected includes:

For any preset time period, according to the NACK/ACK message returned by the terminal to be detected corresponding to the data sent by the beam used in the any preset time period and the data used by the any preset time period. Calculate the MCS value of the terminal to be detected in any preset time period based on the CQI value corresponding to the data sent by the beam, and correct the MCS value in any preset time period to obtain the MCS correction value.

3. The method according to claim 1, characterized in that if there are two beams in the cell and two MCS correction values are obtained, then the method according to the terminal to be detected in each preset time period The MCS correction value determines the location of the terminal to be detected, including:

Obtain the difference between the two MCS correction values, and compare the absolute value of the difference with the first preset threshold;

If the absolute value of the difference is less than the first preset threshold, it is determined that the terminal to be detected is located in the common coverage area of the two beams;

If the absolute value of the difference is greater than the first preset threshold, determine the terminal bit to be detected Coverage area of beams with large MCS correction values.

4. The method according to claim 1, characterized in that, the method further includes: if there are two beams in the cell, and using one of the two beams existing in the cell within a preset time period One of the beams sends data to the terminal to be detected, and within the next preset time period, two beams existing in the cell are used to jointly send data to the terminal to be detected, then two positive MCS values are obtained;

Determining the location of the terminal to be detected based on the MCS correction value of the terminal to be detected in each preset time period includes:

Obtain the difference between the two MCS correction values, and compare the difference with the second preset threshold and the third preset threshold respectively, and the first preset threshold is smaller than the second preset threshold;

If the difference is greater than the second preset threshold and less than the third preset threshold, it is determined that the terminal to be detected is located in the common coverage area of the two beams;

If the difference is greater than the third preset threshold, it is determined that the terminal to be detected is located in the coverage area of a beam that does not separately send data to the terminal to be detected;

If the difference is less than the second preset threshold, it is determined that the terminal to be detected is located in the coverage area of a beam that alone sends data to the terminal to be detected.

5. The method according to any one of claims 1 to 4, characterized in that, before using one of multiple beams existing in the cell to send data to the terminal to be detected in each preset time period , Also includes:

6. A device for detecting the position of a terminal, characterized in that the device includes:

A sending module, configured to use one of the multiple beams existing in the cell to send data to the terminal to be detected in each preset time period; information;

Obtaining module, configured to obtain the downlink information returned by the terminal to be detected received by the receiving module. A determining module, configured to determine the location of the terminal to be detected based on the positive MCS value of the terminal to be detected in each preset time period obtained by the acquisition module.

7. The device according to claim 6, characterized in that, the receiving module is configured to receive the data returned by the terminal to be detected based on the data sent by any beam and the data sent by any beam. Downlink information corresponding to data sent by any beam, the downlink information includes channel quality indicator CQI value and negative acknowledgment NACK/positive acknowledgment ACK message;

The acquisition module is configured to: for any preset time period, according to the NACK/ACK message returned by the terminal to be detected corresponding to the data sent by the beam used in the any preset time period and the any preset time period. Calculate the MCS value of the terminal to be detected in any preset time period based on the CQI value corresponding to the data sent by the beam used in a preset time period, and perform the calculation on the MCS value of the any preset time period. Correction, get the MCS correction value.

8. The device according to claim 6, wherein if there are two beams in the cell, the determining module includes:

A comparison unit, configured to obtain two MCS correction values and the difference between the two MCS correction values, and compare the absolute value of the difference with the first preset threshold;

A first determination unit configured to determine that the terminal to be detected is located in the common coverage area of the two beams if the comparison unit compares that the absolute value of the difference is less than the first preset threshold; second A determining unit configured to determine that the terminal to be detected is located in the coverage area of a beam with a large MCS correction value if the comparison unit determines that the absolute value of the difference is greater than the first preset threshold.

9. The device according to claim 6, wherein if there are two beams in the cell, the sending module is further configured to use the two beams existing in the cell within a preset time period. One of the beams sends data to the terminal to be detected, and two beams existing in the cell are used to jointly send data to the terminal to be detected in the next preset time period;

The determination module also includes:

The comparison unit is also used to obtain two MCS correction values and the difference between the two MCS correction values, and compare the difference with the second preset threshold and the third preset threshold respectively. The first preset threshold less than the second preset threshold;

The first determining unit is further configured to determine that the terminal to be detected is located in the two beams if the comparison unit determines that the difference is greater than the second preset threshold and less than the third preset threshold. common coverage area;

The second determination unit is further configured to determine that the terminal to be detected is located in the coverage of a beam that does not separately send data to the terminal to be detected if the comparison unit determines that the difference is greater than the third preset threshold. area;

A third determination unit configured to determine that the terminal to be detected is located in the coverage area of a beam that alone sends data to the terminal to be detected if the comparison unit compares that the difference is less than the second preset threshold.

10. The device according to any one of claims 6 to 9, characterized in that the device further includes:

A retrieval module, configured to retrieve the uplink signal of each terminal in the cell, and determine the terminal whose power difference corresponding to the uplink signal is less than a preset threshold as the terminal to be detected.