WO2016086643A1

WO2016086643A1 - Coverage distance acquiring method and apparatus

Info

Publication number: WO2016086643A1
Application number: PCT/CN2015/081578
Authority: WO
Inventors: 姬舒平; 赵黎波
Original assignee: 中兴通讯股份有限公司
Priority date: 2014-12-05
Filing date: 2015-06-16
Publication date: 2016-06-09
Also published as: CN105722110A

Abstract

Disclosed are a coverage distance acquiring method and apparatus. The method comprises: determining, according to a pre-acquired correspondence between test rates and coverage distances in single-cell coverage tests, a cumulative percentage P_i when an i^th test rate is lower than a reference rate in the coverage tests, wherein P_i is the ratio of a cumulative sum of distances at which a first test rate to an i^th test rate are lower than the reference rate to a test distance at which the i^th test rate is higher than the reference rate in the coverage tests; determining, according to a pre-acquired cell line coverage rate P_clc, whether P_i is higher than P_clc; and if the determining result is yes, determining that a distance D_id at which the i^th test rate is lower than the reference rate in coverage distances in the coverage tests is a coverage distance of the single-cell coverage tests. By using the technical scheme provided in the present invention, the problem of lacking a criterion for determining a cell coverage capability in the related art is solved.

Description

Method and device for acquiring coverage distance

Technical field

The present invention relates to the field of communications, and in particular to a method and apparatus for acquiring coverage distance.

Background technique

In wireless communication systems, single-cell coverage remote testing is used to judge communication system capabilities (such as Time Division Long Term Evolution (TD-LTE) systems), system equipment capabilities (such as "baseband processing unit (Building Base) Band Unit (BBU) + Radio Remote Unit (RRU) + antenna "), terminal equipment capabilities (such as User Equipment (UE)) and wireless environment propagation models are of great significance. In the single-cell coverage remote test of the 3G system (such as the Time Division-Synchronous Code Division Multiple Access (TD-SCDMA) system), the Block Error Ratio (BLER) is used. >p% lasts for T seconds (such as p=15, T=10) as the basis for judging the dropped call points of the remote test, and there is no unified judgment criterion for the 4G system. In the extensive coverage test in rural areas, there is a judgment basis or criterion problem for the judgment of the call-out point and the coverage radius in the test results.

In view of the lack of a criterion for determining the coverage capability of a cell in the prior art, an effective solution has not yet been proposed.

Summary of the invention

The embodiment of the invention provides a method and a device for acquiring coverage distance, so as to at least solve the problem of lacking the criterion for determining the coverage capability of a cell in the prior art.

According to an aspect of the embodiments of the present invention, a method for obtaining a coverage distance includes: determining, according to a correspondence between a test rate and a coverage distance of a pre-acquired single cell coverage test, that the i-th test rate in the coverage test is less than a reference The cumulative percentage of the rate P _i , where P _i is the ratio of the cumulative sum of the distance from the first to the i-th test rate in the coverage test to be less than the reference rate, and the test distance when the i-th test rate is greater than the reference rate; Obtaining the cell line coverage rate P _clc , determining whether P _i is greater than P _clc ; if the determination result is yes, determining that the distance _id of the i-th test rate in the coverage distance in the coverage test is less than the reference rate is single cell coverage The coverage distance of the test.

Preferably, the cumulative percentage P _i when the i-th test rate in the coverage test is less than the reference rate is determined according to the corresponding relationship by using the following formula, including:

Where D _iu is the distance of the i-th test rate in the coverage test that is greater than the reference rate, used to subtract from D _id , and the subtracted difference is summed by i from 1 to n, and the summed value is obtained. Divided by D _{iu to} obtain P _i .

Preferably, after determining whether P _i is greater than P _clc according to the pre-acquired cell line coverage rate P _clc , the method further includes: if the determination result is negative, if D _{(i+1) u} does not exist, determining D _(i+1)d is the coverage distance of the single cell coverage test, i<i+1.

Preferably, before the corresponding relationship between the test rate and the coverage distance of the pre-acquired single cell coverage test, the method further includes: acquiring a reference rate and a cell line coverage P _clc , wherein the reference rate includes at least one of the following: an uplink reference rate R _u , downlink reference rate R _d .

Preferably, after obtaining the reference rate and the cell line coverage P _clc , the method further includes: obtaining a test rate and a coverage distance by using a single cell coverage test; and determining a correspondence between the test rate and the coverage distance according to the reference rate.

According to another aspect of the present invention, an apparatus for acquiring a coverage distance is provided, including: a first determining module, configured to determine a coverage test according to a correspondence between a test rate and a coverage distance of a pre-acquired single cell coverage test. The cumulative percentage P _i of the i-th test rate is less than the reference rate, where P _i is the distance cumulative sum of the first to the i-th test rate in the coverage test less than the reference rate, and when the i-th test rate is greater than the reference rate measuring a distance ratio; determining module, provided the cell line P _clc coverage based on a pre-acquired, it is determined whether P _i is greater than P _clc; the case where a first processing module, is provided as a result of the determination, the test coverage is determined The distance D _id of the i-th test rate in the coverage distance that is less than the reference rate is the coverage distance of the single-cell coverage test.

Preferably, the first determining module is configured to determine, according to the corresponding relationship, the cumulative percentage P _i when the i-th test rate in the coverage test is less than the reference rate by using the following formula, including:

Preferably, the apparatus further includes: a second processing module, configured to determine, according to the pre-acquired cell line coverage rate P _clc , whether P _i is greater than P _clc , and if the determination result is negative, if D _{(i+ 1) If u} does not exist, it is determined that D _(i+1)d is the coverage distance of the single cell coverage test, i < i+1.

Preferably, the foregoing apparatus further includes: a first acquiring module, configured to acquire a reference rate and a cell line coverage P _clc before the correspondence between the test rate and the coverage distance according to the pre-acquired single cell coverage test, where the reference rate At least one of the following: an uplink reference rate _Ru and a downlink reference rate _Rd .

Preferably, the foregoing apparatus further includes: a second acquiring module, configured to acquire a test rate and a coverage distance by using a single cell coverage test after acquiring the reference rate and the cell line coverage P _clc ; and the second determining module is configured to be based on the reference Rate, which determines the correspondence between the test rate and the coverage distance.

According to the embodiment of the present invention, the cumulative ratio P _i of the i-th test rate in the coverage test is less than the reference rate is determined according to the corresponding relationship between the test rate and the coverage distance of the pre-acquired single cell coverage test, where P _i is the coverage test. The ratio of the cumulative sum of the distance from the first to the i-th test rate is less than the reference rate, and the ratio of the test distance when the i-th test rate is greater than the reference rate; whether P _i is greater than or greater than the pre-acquired cell line coverage P _clc P _clc ; In the case where the judgment result is YES, it is determined that the distance D _id of the i-th test rate in the coverage distance in the coverage test is smaller than the reference rate is the coverage distance of the single-cell coverage test. The problem of lacking the criterion for determining the coverage capability of the cell is solved, thereby achieving the effect of providing a criterion for determining the coverage capability of the cell.

DRAWINGS

The drawings described herein are intended to provide a further understanding of the invention, and are intended to be a part of the invention. In the drawing:

1 is a flow chart of a method for acquiring a coverage distance according to an embodiment of the present invention;

2 is a structural block diagram of an apparatus for acquiring a coverage distance according to an embodiment of the present invention;

3 is a structural block diagram of an apparatus for acquiring a coverage distance according to an embodiment of the present invention;

4 is a block diagram showing the structure of an apparatus for acquiring a coverage distance according to a preferred embodiment of the present invention;

5 is a flow chart of a method of acquiring coverage distance in accordance with a preferred embodiment of the present invention.

detailed description

The invention will be described in detail below with reference to the drawings in conjunction with the embodiments. It should be noted that the embodiments in the present application and the features in the embodiments may be combined with each other without conflict.

In this embodiment, a method for acquiring a coverage distance is provided. FIG. 1 is a flowchart of a method for acquiring coverage distance according to an embodiment of the present invention. As shown in FIG. 1 , the process includes the following steps:

Step S102, determining, according to the corresponding relationship between the test rate and the coverage distance of the pre-acquired single cell coverage test, the cumulative percentage P _i when the i-th test rate in the coverage test is less than the reference rate;

Where P _i is the ratio of the cumulative sum of the distance from the first to the i-th test rate in the coverage test to be less than the reference rate, and the test distance when the i-th test rate is greater than the reference rate.

Step S104, based on coverage cell line P _clc acquired in advance, it is determined whether P _i is greater than P _clc;

In step S106, if the determination result is yes, it is determined that the distance D _id of the i-th test rate in the coverage distance in the coverage test is less than the reference rate is the coverage distance of the single-cell coverage test.

Through the above steps, the cumulative percentage P _i of the i-th test rate in the coverage test is less than the reference rate is determined according to the corresponding relationship between the test rate and the coverage distance of the pre-acquired single-cell coverage test, where P _i is the coverage test. and, when the ratio of the test distance and the i-th test reference rate greater than the rate of 1 to i-th reference rate is less than the cumulative distance test rate; based on coverage cell line P _clc acquired in advance, it is judged whether or not _i is greater than P P _clc In the case where the judgment result is YES, it is determined that the distance D _id of the i-th test rate in the coverage distance in the coverage test is smaller than the reference rate is the coverage distance of the single-cell coverage test. The problem of lacking the criterion for determining the coverage capability of the cell is solved, and the criterion for determining the coverage capability of the cell is provided.

In the method for acquiring the coverage distance provided by the foregoing embodiment of the present invention, the pre-acquired Cell Line Coverage Probability (P _clc ) is used to measure that the i-th test rate in the coverage test is less than the reference rate. Whether the cumulative percentage P _i is greater than the P _clc , if greater than, the distance D _id of the i-th test rate in the coverage test is less than the reference rate as a criterion for measuring the coverage capability of the cell, that is, using D _id as the coverage distance of a cell .

Preferably, in the step S102, the determining manner of the Pi is different. In a preferred embodiment of the embodiment, the following formula may be determined, but is not limited thereto:

Here, D _iu is based on the reference rate. In a coverage test, the i-th test rate is greater than the reference rate, that is, the distance when the i-th test rate is higher than the reference rate; similarly, D _id To measure the distance at which the i-th test rate is less than the reference rate in a coverage test based on the reference rate, that is, the distance at which the i-th test rate is lower than the reference rate.

Preferably, after determining whether P _i is greater than P _clc according to the pre-acquired cell line coverage rate P _clc in step S104, the coverage distance of the single cell coverage test may also be determined by the following steps:

In step S108, if the result of the determination is no, if D _(i+1)u does not exist, it is determined that D _(i+1)d is the coverage distance of the single cell coverage test.

Specifically, if the i+1th time in the coverage test, D _(i+1)d exists but D _(i+1)u does not exist or is uncertain whether it exists, to ensure that the coverage distance of the current cell is obtained Then, the current i+1th D _(i+1)d is the coverage distance of the single cell coverage test, where i<i+1.

Preferably, before the corresponding relationship between the test rate and the coverage distance of the pre-acquired single cell coverage test, the following processing steps may be performed:

Step S94, obtaining a reference rate and a cell line coverage P _clc , wherein the reference rate includes at least one of the following: an uplink reference rate R _u and a downlink reference rate R _d .

The reference rate is based on the uplink reference rate and the downlink reference rate provided by the actual operator, and the method for obtaining the coverage distance provided by the embodiment of the present invention is adopted, which is not limited.

Preferably, after obtaining the reference rate and the cell line coverage P _clc in step S94, the following processing steps may also be included:

Step S96, obtaining a test rate and a coverage distance by using a single cell coverage test;

Step S98, determining a correspondence between the test rate and the coverage distance according to the reference rate.

Wherein, determining the correspondence between the test rate and the coverage distance may display the correspondence between the test rate and the coverage distance through an excel table or a graph.

Specifically, according to the reference rate, the correspondence between the test rate and the coverage distance is determined as follows:

Taking the reference rate as a standard, obtaining the distance from the i-th time greater than the reference rate and the distance from the i-th time less than the reference rate, that is, taking the following line rate test case as an example, setting R _d to 2 Mbps, performing a coverage test at the distance When the test point is 3.1km, the test rate will first fading, that is, the test rate is less than 2Mbps, and the distance 3.1km is recorded as D _1d ; if it is 3.2km from the test point, the test rate is greater than 2Mbps for the first time, record the distance 3.2 Km is D _1u ; similarly, the distance D _{id of the} subsequent i-th time less than 2 Mbps and the distance D _iu , i>1 of the i-th time greater than 2 Mbps are recorded; from the above records, the correspondence between the test rate and the coverage distance is obtained by collation. Similarly, the uplink rate test is the same as the above, and is not described here. The difference from the downlink rate test is that the reference rate is the difference of the uplink reference rate _Ru .

In this embodiment, an apparatus for acquiring a coverage distance is also provided, and the apparatus is configured to implement the foregoing embodiments and preferred embodiments, and details are not described herein. As used below, the term "module" may implement a combination of software and/or hardware of a predetermined function. Although the apparatus described in the following embodiments is preferably implemented in software, hardware, or a combination of software and hardware, is also possible and contemplated.

2 is a structural block diagram of an apparatus for acquiring coverage distance according to an embodiment of the present invention. As shown in FIG. 2, the apparatus includes: a first determining module 22, a determining module 24, and a first processing module 26, where

The first determining module 22 is configured to determine, according to the corresponding relationship between the test rate and the coverage distance of the pre-acquired single cell coverage test, the cumulative percentage P _i when the i-th test rate in the coverage test is less than the reference rate, where P _i is the coverage The ratio of the cumulative sum of the distance from the first to the i-th test rate less than the reference rate in the test, and the test distance when the i-th test rate is greater than the reference rate;

Determining module 24, connected to the establishment of the first determination module 22, provided the cell line P _clc coverage based on a pre-acquired, it is determined whether P _i is greater than P _clc;

The first processing module 26 establishes a connection with the determining module 24, and is configured to determine that the distance D _id of the i-th test rate in the coverage distance in the coverage test is less than the reference rate is a single-cell coverage test if the determination result is yes. Coverage distance.

Preferably, the first determining module 22 is configured to determine, according to the corresponding relationship, the cumulative percentage P _i when the i-th test rate in the coverage test is less than the reference rate by using the following formula, including:

Preferably, FIG. 3 is a structural block diagram of an apparatus for acquiring a coverage distance according to an embodiment of the present invention. As shown in FIG. 3, the apparatus includes, in addition to all the modules shown in FIG.

The second processing module 28 establishes a connection with the determining module 24, and is configured to determine whether P _i is greater than P _clc according to the pre-acquired cell line coverage rate P _clc , and if the determination result is negative, if D _{(i+ 1) If u} does not exist, it is determined that D _(i+1)d is the coverage distance of the single cell coverage test, i < i+1.

Preferably, FIG. 4 is a structural block diagram of an apparatus for acquiring a coverage distance according to a preferred embodiment of the present invention. The apparatus further includes:

The first obtaining module 19 is configured to obtain a reference rate and a cell line coverage P _clc before the correspondence between the test rate and the coverage distance according to the pre-acquired single cell coverage test, where the reference rate includes at least one of the following: Base rate R _u , downlink reference rate R _d .

Preferably, as shown in FIG. 4, the foregoing apparatus further includes:

The second obtaining module 20 establishes a connection with the first obtaining module 19, and is configured to obtain a test rate and a coverage distance by using a single cell coverage test after acquiring the reference rate and the cell line coverage P _clc ;

The second determining module 21 establishes a connection with the second obtaining module 20, and is configured to determine a correspondence between the test rate and the coverage distance according to the reference rate.

A method for obtaining coverage distance provided by an embodiment of the present invention is specifically described in conjunction with the following examples:

The Long Term Evolution (LTE) system is based on packet services in the overall architecture. The most intuitive experience for packet services is the download and upload rate. Therefore, some operators define the rate in the LTE system. The threshold is 20M bandwidth downlink 1Mb/s and uplink 256kb/s as the rate standard for network quality measurement. However, in the single-cell coverage remote test, due to the fluctuation of the wireless environment, the rate will repeatedly fluctuate above and below the threshold, taking the test rate of the single cell coverage as an example, from the relationship between the amplification rate and the distance. It can be clearly seen that when the distance is greater than 6 kilometers, the rate fluctuates repeatedly around the reference rate. At the same time, due to the influence of the test environment, the results of each test will be very different. In the actual test, 10 Even 11 kilometers away, the signal quality can be found in the test. The uplink and downlink rates far exceed the above rate threshold. So, what is the distance point that falls to the rate threshold as an effective cell radius or call drop point?

In the wireless system, due to the limitation of the route and range of the road test and the difference of the wireless signal propagation environment, the wireless network planning cannot achieve the 100% satisfactory signal quality requirement, so the Cell Area Coverage Probability is proposed. Concepts, different wireless environments and different user scale densities, living standards, etc. can be set to different values, such as the current rural coverage scenario in China, taking into account the user's living standards, the rural population population and other general set area coverage rate of 90% That is, in the deployment network, 10% of the area area within the coverage of the cell is allowed to not satisfy the signal quality (for example, the currently widely defined signal quality standard is RSRP > -105dbm, SINR > -3db). At the same time, this parameter is also the basic condition for model calculation in the wireless link propagation model.

Therefore, according to the characteristics of the wireless environment, the embodiment of the present invention introduces a Cell Line Coverage Probability concept P _clc in the LTE single-station coverage remote, as a projection of the cell area coverage rate on the test route, that is, The test distance allowed for the (1-P _clc ) ratio on the cell coverage remote test route does not meet the signal quality requirements (eg, the rate threshold for the downlink signal quality requirements is used as an indicator). The specific calculation method is as follows:

(Formula 1)

When P _i >P _clc , D _id is taken as the coverage distance of the single cell coverage test.

When D _iu does not exist, D _id is taken as the coverage distance of the single cell coverage test.

among them:

P _i : the cumulative percentage when the i-th rate is less than the reference rate (R _d or R _u ),

D _id : distance at the i-th rate at the reference rate (R _d or R _u )

D _iu : the distance at which the i-th rate is greater than the reference rate (R _d or R _u )

i: is the sequence number whose rate is less than the reference rate (R _d or R _u ), and the value starts from 1.

R _d : downlink reference rate (in bps)

R _u : uplink reference rate (in bps)

For example, the distance corresponding to the i-th uplink test rate and the distance corresponding to the i-th downlink test rate are obtained according to the reference rate.

The specific implementation steps are as follows:

Step S501: setting a reference rate and a cell line coverage rate;

Step S502: single station remote testing;

Step S503: drawing a relationship diagram between the test rate and the coverage distance;

Step S504: marking the intersection of the test rate and the reference rate fluctuation, and calculating Pi;

Step S505: determining whether pi is greater than Pclc;

Step S506: Determine the coverage distance of the cell according to Formula 1.

The flowchart of the above embodiment of the present invention is shown in FIG. 5.

The effect achieved by the embodiment of the invention:

(1) The embodiment of the present invention proposes a criterion for determining a single cell coverage radius in an LTE system, and provides a basis for comparing different devices and different technologies to the coverage radius of the cell.

(2) The standard can also be used in network remote testing to judge whether the entire network coverage meets the design requirements.

In another embodiment, software is also provided for performing the technical solutions described in the above embodiments and preferred embodiments.

In another embodiment, a storage medium is further provided, wherein the software includes the above-mentioned software, including but not limited to: an optical disk, a floppy disk, a hard disk, an erasable memory, and the like.

It will be apparent to those skilled in the art that the various modules or steps of the present invention described above can be implemented by a general-purpose computing device that can be centralized on a single computing device or distributed across a network of multiple computing devices. Alternatively, they may be implemented by program code executable by the computing device such that they may be stored in the storage device by the computing device and, in some cases, may be different from the order herein. The steps shown or described are performed, or they are separately fabricated into individual integrated circuit modules, or a plurality of modules or steps thereof are fabricated as a single integrated circuit module. Thus, the invention is not limited to any specific combination of hardware and software.

The above description is only the preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes can be made to the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and scope of the present invention are intended to be included within the scope of the present invention.

Industrial applicability

As described above, the method and apparatus for acquiring the coverage distance provided by the embodiment of the present invention have the following beneficial effects: the criterion for determining the coverage radius of a single cell in the LTE system proposed by the embodiment of the present invention can compare different devices and different technical pairs. The influence of the coverage radius of the cell provides a basis for determination. In addition, the standard can also be applied to network remote testing to assess whether the entire network coverage meets the design requirements.

Claims

A method for obtaining coverage distance, comprising:

Determining, according to the corresponding relationship between the test rate and the coverage distance of the pre-acquired single cell coverage test, the cumulative percentage P i when the i-th test rate in the coverage test is less than the reference rate, where the P i is in the coverage test a ratio of the cumulative sum of the distance from the first to the i-th test rate being less than the reference rate, and the ratio of the test distance when the i-th test rate is greater than the reference rate;

Based on coverage cell line P clc acquired in advance, determines the P i is greater than the P clc;

If the determination result is yes, it is determined that the distance D id of the i-th test rate in the coverage distance in the coverage test is less than the reference rate is the coverage distance of the single-cell coverage test.
The method according to claim 1, wherein the cumulative percentage P i when the i-th test rate in the coverage test is less than the reference rate is determined according to the correspondence according to the correspondence, comprising:

Wherein, the D iu is a distance in which the i-th test rate in the coverage test is greater than the reference rate, used to subtract from the D id , and the subtracted difference is calculated from i to 1 to n. And, the P i is obtained by dividing the summed value by the D iu .
The method according to claim 2, wherein after determining whether the P i is greater than the P clc according to the pre-acquired cell line coverage P clc , the method further comprises:

If the judgment result is negative, if D (i+1)u does not exist, it is determined that D (i+1)d is the coverage distance of the single cell coverage test, i < i+1.
The method according to claim 1, wherein before the correspondence between the test rate and the coverage distance of the pre-acquired single cell coverage test, the method further includes:

Obtaining the reference rate and the cell line coverage P clc , wherein the reference rate comprises at least one of: an uplink reference rate Ru and a downlink reference rate R d .
The method of claim 4, after the obtaining the reference rate and the cell line coverage P clc , further comprising:

Obtaining the test rate and the coverage distance by using the single cell coverage test;

Corresponding relationship between the test rate and the coverage distance is determined according to the reference rate.
A device for covering a distance, comprising:

a first determining module, configured to determine, according to a corresponding relationship between a test rate and a coverage distance of the pre-acquired single cell coverage test, a cumulative percentage P i when the i-th test rate in the coverage test is less than a reference rate, where the P i is a distance cumulative sum of the first to the i-th test rate in the coverage test that is less than the reference rate, and a ratio of the test distance when the i-th test rate is greater than the reference rate;

A determining module, provided the cell line P clc coverage based on a pre-acquired, determines the P i is greater than the P clc;

a first processing module, configured to determine, in a case that the determination result is yes, a distance D id of the i-th test rate in the coverage distance that is smaller than the reference rate in the coverage test is a coverage distance of a single-cell coverage test .
The apparatus according to claim 6, wherein the first determining module is configured to determine, according to the correspondence, a cumulative percentage P when the i-th test rate in the coverage test is less than the reference rate according to the correspondence i , including:

Wherein, the D iu is a distance in which the i-th test rate in the coverage test is greater than the reference rate, used to subtract from the D id , and the subtracted difference is calculated from i to 1 to n. And, the P i is obtained by dividing the summed value by the D iu .
The apparatus of claim 7 wherein said apparatus further comprises:

The second processing module is configured to: after determining whether the P i is greater than the P clc according to the pre-acquired cell line coverage rate P clc , if the determination result is no, if D (i+1) u is not If present, it is determined that D (i+1)d is the coverage distance of the single cell coverage test, i < i + 1.
The apparatus of claim 6 wherein said apparatus further comprises:

The first obtaining module is configured to acquire the reference rate and the cell line coverage P clc before the correspondence between the test rate and the coverage distance according to the pre-acquired single cell coverage test, where the reference rate includes the following At least one of: an uplink reference rate R u and a downlink reference rate R d .
The apparatus of claim 9 wherein said apparatus further comprises:

a second acquiring module, configured to acquire the test rate and the coverage distance by using the single cell coverage test after acquiring the reference rate and the cell line coverage P clc ;

The second determining module is configured to determine a correspondence between the test rate and the coverage distance according to the reference rate.