CN102647725B - Method and device for determining neighbor cell priority in neighbor cell planning - Google Patents
Method and device for determining neighbor cell priority in neighbor cell planning Download PDFInfo
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Abstract
The invention discloses a method for determining the neighbor cell priority in neighbor cell planning, which comprises the following steps: obtaining the covering radius and a covering circle center coordinate of each cell according to the longitude, the latitude and the direction angle of each cell of the assembly of a main cell and a candidate neighbor cell; obtaining the covering and overlapping indexes of all the cells and main cells in the assembly of the candidate neighbor cell according to the covering radius and the covering circle center coordinate of each cell; and determining the cell priority in the assembly of the candidate neighbor cell according to the covering and overlapping indexes. The invention also discloses a device for determining the neighbor cell priority in neighbor cell planning. According to the scheme disclosed by the invention, the complexity of the priority calculation of the neighbor cell can be lowered; meanwhile the covering radius and the overlapping degree of the cells can be considered; and the method and the device are suitable for the neighbor cell planning of the large-scale newly-built network.
Description
Technical Field
The invention relates to a neighbor cell planning technology in a cellular mobile communication system, in particular to a method and a device for determining the priority of a neighbor cell in neighbor cell planning.
Background
In a cellular mobile communication system, it is necessary to ensure the continuity of service of a Mobile Station (MS) during the moving process, and the timely handover of the MS between cells is an important means for ensuring the continuity of the service. Usually, each main cell maintains a neighbor cell list, when the MS moves, the MS can switch to a neighbor cell of the current serving cell in time according to the signal strength, and if the neighbor cell configuration is not proper, network problems such as a handover call drop and the like can be caused.
In the prior art, the priority of the neighbor cell is generally determined by simulating a real wireless propagation model so as to determine the coverage and the strength of a propagation signal, and the calculation of the priority is determined according to coverage overlapping or distance. The prior art has the following disadvantages:
1. the considerations in determining the priority of the neighbor cells cannot be organically combined together: although a lot of parameters are used in simulation, only some factors can be considered in decision making;
2. the calculation is complex: in the prior art, the prior art needs to divide the priority of the neighbor cell into point grids firstly, and the coverage of the cell can be obtained according to the simulation result, although the coverage is more accurate, the calculation time and complexity are high, and the method is not suitable for neighbor cell planning of a large-scale newly-built network;
3. the formulas for calculating the priority and the coverage overlap index are not quantified.
Disclosure of Invention
In view of the above, the main objective of the present invention is to provide a method and an apparatus for determining a priority of a neighboring cell in a neighboring cell planning, which can reduce the complexity of calculating the priority of the neighboring cell, and can consider the coverage radius of the cell and the overlapping degree between the cells at the same time, so that the method and the apparatus are suitable for the neighboring cell planning of a large-scale newly-built network.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
the invention provides a method for determining the priority of a neighbor cell in neighbor cell planning, which comprises the following steps:
acquiring the coverage radius and the coverage circle center coordinate of each cell according to the longitude and latitude and the direction angle of each cell in the main cell and the candidate neighbor cell set;
acquiring coverage overlapping indexes of all cells and a main cell in a candidate neighbor cell set according to the coverage radius and the coverage circle center coordinates of each cell;
and determining the cell priority in the candidate neighbor cell set according to the coverage overlap index.
In the foregoing solution, before obtaining the coverage radius and the coverage circle center coordinate of each cell according to the longitude and latitude and the direction angle of each cell in the main cell and the candidate neighbor cell set, the method further includes: selecting a main cell to be planned and a candidate neighbor cell set of the cell, obtaining a Base Station Controller Identifier (BSCID), a base station identifier (SiteID), a cell identifier (CellID), longitude and latitude and a direction angle of each cell from engineering parameters, and setting a distance threshold AdjMin and a maximum neighbor cell number M which must be configured as neighbor cells.
In the above scheme, if the primary cell is cell B, the coverage radius R of cell B isBComprises the following steps: the quotient of the average value of the distances between the n base stations and the cell B and the parameter h;
the h is equal to 2 when the cell B is a directional cell and is equal to 1 when the cell B is an omni-directional cell; the n base stations are the n base stations which are closest to the cell B in the coverage area of the cell B.
In the above solution, the coverage overlap index of the cell C in the candidate neighbor cell set is: obtaining the distance Dis between the cell C and the cell B according to the longitude and latitude of the cell C and the cell B, and if the distance Dis between the cell C and the cell B is smaller than a distance threshold AdjMin which must be configured as a neighboring cell, the coverage overlap index OverlapC of the cell C is + ∞;
if the distance value Dis between the cell C and the cell B is greater than or equal to the distance threshold AdjMin that must be configured as the neighboring cell, the coverage overlap index OverlapC of the cell C is:
OverlapC＝(1-d/(RB+RC))*(AdjMin/Dis)
wherein R isB、RCRespectively representing the coverage radius of cell B and cell C; d represents the distance between the centers of the coverage areas of the cell B and the cell C, and is obtained by the coordinates of the centers of the coverage areas of the cell B and the cell C.
In the foregoing solution, the determining the cell priority in the candidate neighbor cell set according to the coverage overlap index is as follows: and sequencing the coverage overlapping indexes of all the cells in the candidate neighbor cell set from large to small, and taking the first M cells with the coverage overlapping indexes larger than 0 as the planning neighbor cells of the main cell.
The invention provides a device for determining the priority of a neighbor cell in neighbor cell planning, which comprises the following steps: a coverage radius and circle center coordinate obtaining module, a coverage overlap index obtaining module and a cell priority determining module; wherein,
a covering radius and circle center coordinate obtaining module for obtaining the covering radius and the covering circle center coordinate of each cell according to the longitude and latitude and the direction angle of each cell in the main cell and the candidate neighbor cell set;
a covering overlapping index obtaining module, configured to obtain a covering overlapping index between all cells in the candidate neighboring cell set and the main cell according to the covering radius and the covering circle center coordinate of each cell;
and the cell priority determining module is used for determining the cell priority in the candidate neighbor cell set according to the coverage overlapping index.
In the above solution, the apparatus further includes a setting module, configured to select a main cell to be planned and a candidate neighbor set of the main cell, obtain BSCID, SiteID, CellID, longitude and latitude, and a direction angle of each cell from engineering parameters, and set a distance threshold AdjMin and a maximum number M of neighbors that must be configured as neighbors.
In the foregoing solution, the cell priority determining module is specifically configured to rank the coverage overlap indexes of the cells in the candidate neighbor cell set in descending order, and take the first M cells with the coverage overlap indexes greater than 0 as the planned neighbor cells of the main cell.
The invention provides a method and a device for determining the priority of a neighbor cell in neighbor cell planning, wherein the coverage radius and the coverage circle center coordinate of each cell are obtained according to the longitude and latitude and the direction angle of each cell in a main cell and a candidate neighbor cell set; acquiring coverage overlapping indexes of all cells and a main cell in a candidate neighbor cell set according to the coverage radius and the coverage circle center coordinates of each cell; determining the cell priority in the candidate neighbor cell set according to the coverage overlap index; therefore, the complexity of the priority calculation of the adjacent cells can be reduced, the coverage radius of the cells and the overlapping degree among the cells can be considered simultaneously, and the method is suitable for adjacent cell planning of a large-scale newly-built network.
Drawings
Fig. 1 is a schematic flowchart of a method for determining a priority of a neighboring cell in a neighboring cell planning according to an embodiment of the present invention;
fig. 2 is a schematic diagram of the coverage center coordinates of a cell B that is an omni-directional cell in the embodiment of the present invention;
FIG. 3 is a diagram illustrating coordinates of a center of a coverage area of a directional cell in an embodiment of the present invention;
fig. 4 is a schematic diagram illustrating a distance d between centers of coverage areas of cells B and C and a distance Dis between cells C and B according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of an apparatus for determining a priority of a neighboring cell in a neighboring cell planning according to an embodiment of the present invention.
Detailed Description
The basic idea of the invention is: acquiring the coverage radius and the coverage circle center coordinate of each cell according to the longitude and latitude and the direction angle of each cell in the main cell and the candidate neighbor cell set; acquiring coverage overlapping indexes of all cells and a main cell in a candidate neighbor cell set according to the coverage radius and the coverage circle center coordinates of each cell; and determining the cell priority in the candidate neighbor cell set according to the coverage overlap index.
The invention is further described in detail below with reference to the figures and the specific embodiments.
The invention realizes a method for determining the priority of a neighbor cell in neighbor cell planning, as shown in figure 1, the method comprises the following steps:
step 101: acquiring the coverage radius and the coverage circle center coordinate of each cell according to the longitude and latitude and the direction angle of each cell in the main cell and the candidate neighbor cell set S;
specifically, a main cell to be planned and a candidate neighbor cell set S of the cell are selected, BSCID, SiteID, CellID, longitude and latitude and direction angles of each cell are obtained from engineering parameters, and a distance threshold AdjMin and a maximum neighbor cell number M which must be configured as neighbor cells are set according to network practical conditions;
in this embodiment, a cell B is selected as a primary cell, and the following example is taken to calculate a coverage radius and a coverage center coordinate of the cell B:
firstly, determining the coverage area of a cell B, and if the cell B is an omnidirectional cell, determining that the cell B is a circular area with the cell B as a circle center; if the cell B is a directional cell, the coverage area of the cell B is a sector area with the cell B as the center of a circle; selecting n base stations nearest to the cell B within the coverage range, wherein n is generally 10, and then the coverage radius R of the cell BBComprises the following steps:
RB(average distance between n base stations and cell B)/h
Wherein if cell B is a directional cell, h is 2; if cell B is an omni-directional cell, h is 1; the distances between the n base stations and the cell B can be obtained through the calculation of the longitudes and latitudes of the n base stations and the cell B.
For an omnidirectional cell, the coordinates of the covered circle center are the longitude and latitude of the cell as shown in fig. 2; for directional cells, as shown in fig. 3, the longitude and latitude are extended from the location of the cell by the coverage radius distance along the direction angle.
And the calculation method of the coverage radius and the coverage circle center coordinate of each cell in the candidate neighbor cell set S is the same as the above.
Step 102: acquiring coverage overlapping indexes of all cells and a main cell in the candidate neighbor cell set S according to the coverage radius and the coverage circle center coordinate of each cell;
specifically, taking a cell C in the candidate neighbor cell set S as an example, taking the main cell as the cell B, obtaining the distance Dis between the cell C and the cell B according to the longitude and latitude of the cell C and the cell B:
1. if the distance Dis between the cell C and the cell B is less than a threshold value AdjMin of the distance between the cells, the coverage overlapping index OverlapC of the cell C is + ∞;
2. if the distance value Dis ═ between the cell C and the cell B needs to be configured as the neighbor distance threshold value AdjMin, the coverage overlap index OverlapC of the cell C is:
OverlapC＝(1-d/(RB+RC))*(AdjMin/Dis)
wherein R isB、RCRespectively representing the coverage radius of cell B and cell C; d is as shown in fig. 4, and represents the distance between the centers of the coverage areas of the cells B and C, and is obtained from the coordinates of the centers of the coverage areas of the cells B and C;
d/(RB+RC) The coverage coincidence degree of the two cells is represented, the value greater than 1 represents that the coverage areas of the two cells are not coincided, the value less than 1 represents that the two cells have the coverage coincidence range, and the smaller the value is, the larger the coverage coincidence range is;
AdjMin/Dis reflects a higher priority as a neighbor cell when cell C and cell B are closer together.
And sequentially calculating the coverage overlapping indexes of all the cells and the cell B in the candidate neighbor cell set S according to the method.
Step 103: determining the cell priority in the candidate neighbor cell set S according to the coverage overlap index;
specifically, the coverage overlap indexes of the cells in the candidate neighbor cell set S are sorted in descending order, and the first M cells with the coverage overlap indexes greater than 0 are taken as the planning neighbor cells of the main cell, where M is generally 32.
In order to implement the foregoing method, the present invention further provides a device for determining a priority of a neighboring cell in a neighboring cell planning, where as shown in fig. 5, the device includes: a coverage radius and circle center coordinate obtaining module 51, a coverage overlap index obtaining module 52 and a cell priority determining module 53; wherein,
a covering radius and circle center coordinate obtaining module 51, configured to obtain a covering radius and a covering circle center coordinate of each cell according to the longitude and latitude and the direction angle of each cell in the main cell and the candidate neighbor cell set;
a coverage overlap index obtaining module 52, configured to obtain a coverage overlap index between all cells in the candidate neighboring cell set and the main cell according to the coverage radius and the coverage circle center coordinate of each cell;
a cell priority determining module 53, configured to determine a cell priority in the candidate neighbor cell set according to the coverage overlap index;
the device further comprises a setting module 54, configured to select a main cell to be planned and a candidate neighbor set of the main cell before the coverage radius and circle center coordinate obtaining module 51 works, obtain BSCID, SiteID, CellID, longitude and latitude, and direction angle of each cell from engineering parameters, and set a distance threshold AdjMin and a maximum neighbor number M that must be configured as a neighbor according to network practical conditions;
the cell priority determining module 53 is specifically configured to rank the coverage overlap indexes of the cells in the candidate neighbor cell set in descending order, and take the first M cells with the coverage overlap indexes greater than 0 as the planned neighbor cells of the main cell, where M is generally 32.
The process of the present invention is further illustrated by the following specific examples.
Examples
In this embodiment, taking GSM, UMTS, TD-SCDMA, LTE, and other networks as examples, a main cell to be planned and a candidate neighbor set of the main cell are selected, for example, a cell B is selected as the main cell, the cell B is a directional cell, BSCID, SiteID, CellID, longitude and latitude, and a direction angle of each cell are obtained from engineering parameters, and a neighbor distance threshold of 200 meters and a maximum number of neighbors of 31 are set according to an actual network condition;
when the cell priority in the candidate neighbor cell set is determined, the coverage radius and the coverage circle center coordinate of each cell are obtained according to the longitude and latitude and the direction angle of each cell in the cell B and the candidate neighbor cell set; taking the example of obtaining the coverage radius and the coordinates of the center of a coverage circle of the cell B, calculating the distance between the cells according to the longitude and latitude, determining the coverage range of the cell B by using the direction angle of the cell B, selecting 10 base stations closest to the cell B in the coverage range, calculating the average distance value between the 10 base stations and the cell B, dividing the average distance value by 2 to obtain the coverage radius of the cell B, wherein the coordinates of the center of the coverage circle of the cell B are the longitude and latitude after extending the distance of the coverage radius from the position of the cell B along the direction angle of the cell B;
obtaining a coverage overlap index of each cell and a cell B in the candidate neighbor cell set according to the coverage radius and the coverage circle center coordinate of each cell, wherein the specific method is as described in step 102 and is not repeated here;
and sequencing all cells in the candidate neighbor cell set from large to small according to the coverage overlap index, and taking the first 31 cells as planned neighbor cells.
The method of the invention can reduce the complexity of the priority calculation of the adjacent cell, can simultaneously consider the coverage radius of the cell and the overlapping degree between the cells, and is suitable for the adjacent cell planning of a large-scale newly-built network.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention.
Claims (7)
1. A method for determining a priority of a neighbor cell in a neighbor cell planning, the method comprising:
acquiring the coverage radius and the coverage circle center coordinate of each cell according to the longitude and latitude and the direction angle of each cell in the main cell and the candidate neighbor cell set;
acquiring coverage overlapping indexes of all cells and a main cell in a candidate neighbor cell set according to the coverage radius and the coverage circle center coordinates of each cell;
determining the cell priority in the candidate neighbor cell set according to the coverage overlap index;
before the coverage radius and the coverage circle center coordinate of each cell are obtained according to the longitude and latitude and the direction angle of each cell in the main cell and the candidate neighbor cell set, the method further comprises the following steps: selecting a main cell to be planned and a candidate neighbor cell set of the cell, and setting a distance threshold AdjMin and the maximum neighbor cell number M which must be configured as neighbor cells;
the main cell is a cell B, and the coverage overlap index of a cell C in the candidate neighbor cell set is as follows: obtaining the distance Dis between the cell C and the cell B according to the longitude and latitude of the cell C and the cell B, and if the distance Dis between the cell C and the cell B is smaller than a distance threshold AdjMin which must be configured as a neighboring cell, the coverage overlap index OverlapC of the cell C is + ∞;
if the distance value Dis between the cell C and the cell B is greater than or equal to the distance threshold AdjMin that must be configured as the neighboring cell, the coverage overlap index OverlapC of the cell C is:
OverlapC＝(1-d/(RB+RC))*(AdjMin/Dis)
wherein R isB、RCRespectively representing the coverage radius of cell B and cell C; d represents the distance between the centers of the coverage areas of the cell B and the cell C, and is obtained by the coordinates of the centers of the coverage areas of the cell B and the cell C.
2. The method of claim 1, wherein before obtaining the coverage radius and the coverage center coordinates of each cell according to the longitude and latitude and the direction angle of each cell in the main cell and the candidate neighbor cell set, the method further comprises: and obtaining a Base Station Controller Identifier (BSCID), a base station identifier (SiteID), a cell identifier (CellID), longitude and latitude and a direction angle of each cell from the engineering parameters.
3. Method according to claim 2, characterized in that the coverage radius R of cell BBComprises the following steps: the quotient of the average value of the distances between the n base stations and the cell B and the parameter h;
the h is equal to 2 when the cell B is a directional cell and is equal to 1 when the cell B is an omni-directional cell; the n base stations are the n base stations which are closest to the cell B in the coverage area of the cell B.
4. The method of claim 2, wherein the determining the cell priority in the candidate neighbor cell set according to the coverage overlap index is: and sequencing the coverage overlapping indexes of all the cells in the candidate neighbor cell set from large to small, and taking the first M cells with the coverage overlapping indexes larger than 0 as the planning neighbor cells of the main cell.
5. An apparatus for determining a priority of a neighbor cell in a neighbor cell planning, the apparatus comprising: the device comprises a setting module, a coverage radius and circle center coordinate obtaining module, a coverage overlap index obtaining module and a cell priority determining module; wherein,
a setting module, configured to select a main cell to be planned and a candidate neighbor cell set of the main cell, and set a distance threshold AdjMin and a maximum number M of neighbor cells that must be configured as neighbor cells;
a covering radius and circle center coordinate obtaining module for obtaining the covering radius and the covering circle center coordinate of each cell according to the longitude and latitude and the direction angle of each cell in the main cell and the candidate neighbor cell set;
a covering overlapping index obtaining module, configured to obtain a covering overlapping index between all cells in the candidate neighboring cell set and the main cell according to the covering radius and the covering circle center coordinate of each cell;
a cell priority determining module, configured to determine a cell priority in the candidate neighbor cell set according to the coverage overlap index;
the coverage overlap index obtaining module is specifically configured to obtain a distance Dis between a cell C and a cell B according to the longitude and latitude of the cell C and the cell B in the candidate neighbor cell set, and if the distance Dis between the cell C and the cell B is smaller than a neighbor cell distance threshold value AdjMin which must be configured, the coverage overlap index of the cell C is + ∞;
if the distance value Dis between the cell C and the cell B is greater than or equal to the distance threshold AdjMin that must be configured as the neighboring cell, the coverage overlap index OverlapC of the cell C is:
OverlapC＝(1-d/(RB+RC))*(AdjMin/Dis)
wherein R isB、RCRespectively representing the coverage radius of cell B and cell C; d represents the distance between the centers of the coverage areas of the cell B and the cell C, and is obtained by the coordinates of the centers of the coverage areas of the cell B and the cell C.
6. The apparatus of claim 5, wherein the setting module is further configured to obtain BSCID, SiteID, CellID, longitude and latitude, and direction angle of each cell from engineering parameters.
7. The apparatus of claim 6, wherein the cell priority determining module is specifically configured to rank the coverage overlap indexes of the cells in the candidate neighbor cell set in descending order, and take the top M cells with the coverage overlap indexes greater than 0 as the planned neighbor cells of the main cell.
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| CN201110040175.1A CN102647725B (en) | 2011-02-17 | 2011-02-17 | Method and device for determining neighbor cell priority in neighbor cell planning |
| PCT/CN2011/082488 WO2012109934A1 (en) | 2011-02-17 | 2011-11-18 | Method and device for determining priority of neighbor in neighbor planning |
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| CN201110040175.1A CN102647725B (en) | 2011-02-17 | 2011-02-17 | Method and device for determining neighbor cell priority in neighbor cell planning |
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| CN104105105B (en) * | 2013-04-11 | 2018-01-05 | 普天信息技术研究院有限公司 | The method for determining adjacent area proximity relations |
| CN105228161B (en) * | 2014-06-24 | 2019-05-17 | 普天信息技术有限公司 | A kind of adjacent section planning method |
| CN105744533B (en) * | 2014-12-11 | 2019-05-10 | 中国移动通信集团吉林有限公司 | A kind of adjacent area determines method, apparatus and system |
| CN106332097B (en) * | 2015-06-25 | 2019-09-17 | 电信科学技术研究院 | A kind of determination method and device of priority of adjacent domain |
| CN108260130B (en) * | 2016-12-29 | 2021-10-22 | 中国移动通信集团浙江有限公司 | Method and device for planning station-opening parameters and station-opening adjacent cells of base station |
| CN112804709B (en) * | 2019-11-13 | 2022-10-14 | 中国移动通信集团重庆有限公司 | Method and device for determining overlapping coverage condition between serving cells |
| CN112584390B (en) * | 2020-11-12 | 2022-08-16 | 福建福诺移动通信技术有限公司 | Method for automatically calculating start-up neighbor cell based on coverage grid overlapping rate |
| CN114125866B (en) * | 2021-10-12 | 2024-09-03 | 中通服建设有限公司 | Neighbor planning method, neighbor planning device, computer equipment and storage medium |
| CN114374980B (en) * | 2021-12-29 | 2024-05-10 | 中国电信股份有限公司 | Neighbor relation determination method and device, electronic equipment and medium |
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| US5509051A (en) * | 1993-09-09 | 1996-04-16 | Hughes Aircraft Company | Prioritization of neighboring cells |
| CN101594618A (en) * | 2008-05-27 | 2009-12-02 | 中兴通讯股份有限公司 | Adaptive configuring method for neighboring area in a kind of wireless network |
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| KR101479340B1 (en) * | 2007-09-18 | 2015-01-06 | 엘지전자 주식회사 | Method for performing cell reselection procedure in wireless communication system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5509051A (en) * | 1993-09-09 | 1996-04-16 | Hughes Aircraft Company | Prioritization of neighboring cells |
| CN101594618A (en) * | 2008-05-27 | 2009-12-02 | 中兴通讯股份有限公司 | Adaptive configuring method for neighboring area in a kind of wireless network |
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Effective date of registration: 20201112 Address after: Fengli town Xinjian West Road, Rudong County, Nantong City, Jiangsu Province 226400 Patentee after: Rudong Wenyuan investment and Development Co., Ltd Address before: 518057 Nanshan District Guangdong high tech Industrial Park, South Road, science and technology, ZTE building, Ministry of Justice Patentee before: ZTE Corp. |