WO2011088690A1

WO2011088690A1 - Method and apparatus for updating adjacent cell information of picocells

Info

Publication number: WO2011088690A1
Application number: PCT/CN2010/077325
Authority: WO
Inventors: 赵峰丽
Original assignee: 中兴通讯股份有限公司
Priority date: 2010-01-19
Filing date: 2010-09-26
Publication date: 2011-07-28
Also published as: CN102131176A; CN102131176B

Abstract

A method and an apparatus for updating adjacent cell information of picocells are disclosed. A base station controller obtains preliminary adjacent cell information, and obtains logic cells or picocells to be selected; the base station controller compares the logic cells or the picocells to be selected with the preliminary adjacent cell information, and performs the selection for the logic cells or the picocells to be selected according to the selection principle that the co-frequency interference and the adjacent frequency interference are avoided, and determines the logic cells or the picocells being able to be complemented; and then the base station controller updates the preliminary adjacent cell information according to the determined logic cells or picocells being able to be complemented.

Description

Method and device for updating neighboring area information of pico area

Technical field

The present invention relates to the field of mobile communications, and in particular, to a method and apparatus for updating neighbor information of a pico cell in the field of mobile communications.

Background technique

The birth of the pico base station has contributed a lot to the network construction and development. When there are many pico base stations in an area, these pico base stations may have a common macro neighbor. In the process of implementation, each base station will have a neighbor list. Since the macro base station has a relatively large area, there may be many pico neighbors adjacent to it. The parameter configuration of the existing macro neighboring area is manually configured in the background, and the number of neighboring cells in the neighboring cell table of the macro neighboring cell has a certain limit, and when the pico base station is used in a large amount, it is impossible to The neighboring areas are all configured in the macro neighborhood. Therefore, in the macro neighboring area of the existing system, the pico base stations cannot be configured one by one into the neighboring cell table, which seriously affects the reselection and handover between the macro base station and some of the pico base stations, and further, the user's perception Degrees and quality of service will also be affected. Moreover, by manually setting up so many pico base stations on the core network side, the management and maintenance workload is too large, which requires a lot of manpower and time.

In view of the above problems, the industry has also proposed some effective solutions, such as the introduction of logical cell functions can skillfully solve the above problems. Wherein, a pico cell having the same frequency point and the same color code under one location area is called a logical cell, and each pico cell of the pico cell A in FIG. 1 has the same frequency point and color code, and jointly constitutes a logical cell 1; Each of the pico cells of the pico cell B in FIG. 1 collectively constitutes a logical cell 2; each pico cell of the pico cell C in FIG. 1 constitutes a logical cell 3. Each of the logical cells has an independent cell identifier, and the pico cells of the same color belong to the respective logical cells, and the pico cells under the same logical cell are not adjacent to each other. Although each picocell under the logical cell also has an independent and unique cell identifier, in all the business processes, the core network side sees a small number of logical cell identifiers. The biggest advantage of this design is that it is convenient. The maintenance of the core network, especially the configuration of the neighboring area of the macro base station, becomes simple, that is, only the same frequency point and all the pico cells of the same color code need to be set as one neighbor in the neighboring area configuration of the macro base station. The area, that is, the logical cells having the same frequency point and the same color code can be set, so that the switching and reselection of the macro cell and the pico cell can be easily realized.

However, although the concept of the logical cell solves the problem of switching between the macro cell and the pico cell, there is no improvement in the handover problem between the pico cells. Therefore, there is an urgent need for a method for increasing the neighboring cell, so as to improve the success rate of the picocell switching.

Summary of the invention

The technical problem to be solved by the present invention is to provide a method and a device for updating neighbor information of a pico cell, which can improve the handover success rate between the pico cells.

Due to the dynamic access characteristics of the pico base station and the widespread use of the automatic neighbor configuration technology, some micro-neighbor regions may not be scanned due to problems such as scan thresholds and improper scan range settings; sometimes due to interference or due to pico base stations At the same time, power-on and other reasons may cause the situation that the neighboring area is not scanned or the neighboring area that is swept is not available. Therefore, the phenomenon that the neighboring pico base stations cannot be switched and reselected may occur, thereby seriously affecting the user. Call quality and perception. Although the emergence of the logical area concept solves the problem of switching between macro cells and pico cells, there is no improvement in the switching problem between pico cells. Therefore, there is an urgent need for a method for increasing the neighboring cell, so as to improve the success rate of the picocell switching.

In order to solve the above problem, the present invention provides a method for updating neighbor information of a pico cell, which includes:

The base station controller acquires preliminary neighboring cell information and obtains a logical cell or a pico cell to be screened; the base station controller compares the logical cell or the pico cell to be selected with the preliminary neighboring cell information, so as to avoid co-channel interference and neighboring The screening principle of frequency interference is to filter the selected logical cells or pico cells to determine logical cells or pico cells that can be supplemented;

The base station controller updates the preliminary neighbor information based on the logical cell or pico cell that is determined to be replenished.

The above method also has the following characteristics:

The step of acquiring the preliminary neighbor information in the base station controller and obtaining the logical cell to be screened Before, the above also includes:

The base station controller completes the neighboring cell configuration of the pico base station;

The preliminary neighboring cell information is the neighboring cell information of the pico neighboring cell of the pico base station; the logical cell to be filtered is all the logical cells configured by the base station controller;

The step of the base station controller acquiring the preliminary neighboring cell information and obtaining the logical cell to be filtered is: the base station controller acquires the neighboring cell information of the pico neighboring cell of the pico base station, and acquires all the logical cells configured by the base station controller;

The base station controller compares the logical cell to be screened with the initial neighboring cell information, and filters the logical cell or the pico cell to be screened according to the screening principle of avoiding co-channel interference and adjacent channel interference, and determines the logic that can be supplemented. The steps of the cell are: the base station controller compares the logical cell with the neighboring cell information of the pico base station in turn, selects the logical cell according to the screening principle of avoiding the occurrence of the same frequency interference and the adjacent frequency interference, and determines the logical cell that can be supplemented;

The step of the base station controller updating the preliminary neighbor information according to the determined replenishable logical cell is: The base station controller adds the complementary logical cell as a pico neighbor to the neighbor information of the pico base station.

The above method also has the following characteristics:

The base station controller compares all the logical cells configured under the control of the base station with the neighboring cell information of the pico base station, and filters all the logical cells configured under the control of the base station according to the screening principle of avoiding the occurrence of the same-frequency interference and the adjacent-frequency interference. The step of performing the supplementary logical cell includes: the base station controller compares the logical area of the logical cell configured by the base station and the neighboring area of the pico base station, if the logical cell configured under the control of the base station and the neighboring area of the pico base station have the same frequency point and The same color code does not use the logical cell configured under the control of the base station as a logical cell that can be supplemented; otherwise, the logical cell configured under the control of the base station is used as a logical cell that can be supplemented.

The above method also has the following characteristics:

Before the step of the base station controller acquiring the preliminary neighbor information and obtaining the logical cell to be filtered, the foregoing method further includes:

Receiving, by the base station controller, an exit service message sent by the pico base station;

The preliminary neighbor information is the neighbor information of the pico neighboring area of the pico base station; the logic to be filtered The cell is a logical cell where the pico base station is located;

The step of the base station controller acquiring the preliminary neighboring cell information and obtaining the logical cell to be selected is: the base station controller acquiring the neighboring cell information of all the pico neighboring cells of the pico base station, and acquiring the logical cell where the pico base station is located;

The base station controller compares the logical cell to be screened with the initial neighboring cell information, and filters the logical cell or the pico cell to be screened according to the screening principle of avoiding co-channel interference and adjacent channel interference, and determines the logic that can be supplemented. The steps of the cell are: the base station controller compares the logical cell where the pico base station is located with the neighboring area information of all pico neighboring cells of the pico base station, and the logic of the pico base station according to the screening principle for avoiding the occurrence of the same frequency and adjacent frequency interference. The cell performs screening to determine that the logical cell is a logical cell that can be supplemented;

The step of the base station controller updating the preliminary neighboring cell information according to the determined replenishable logical cell is: the base station controller adds the determined replenishable logical cell to the neighboring cell information of all the pico neighboring cells of the pico base station in.

The above method also has the following characteristics:

The base station controller compares the logical cell where the pico base station is located with the neighboring cell information of all the pico neighboring cells of the pico base station, and filters the logical cell where the pico base station is located according to the screening principle of avoiding the occurrence of the same frequency and adjacent frequency interference, and determines The steps of the supplementary logical cell include:

The base station controller compares the logical cell where the pico base station is located with the neighboring cell information of the pico neighboring cell of the pico base station, if a neighboring cell of the pico neighboring cell of the pico base station and the logical cell where the pico base station is located have the same frequency point. And the same color code, determining that the logical cell where the pico base station is located is a logical cell that cannot be added to the neighboring cell information of the pico neighboring cell of the pico base station; otherwise, the logical cell where the pico base station is located is a pico neighbor that can be added to the pico base station. The logical cell in the neighborhood information of the zone.

The above method also has the following characteristics:

Before the step of the base station controller acquiring the preliminary neighbor information and obtaining the pico cell to be screened, the method further includes:

A new pico base station accesses the network under the base station controller;

The preliminary neighbor information is the neighbor information of the pico neighboring area of the newly accessed pico base station; The selected pico cell is a pico cell of the newly accessed pico base station;

The step of the base station controller acquiring the preliminary neighbor information and obtaining the pico cell to be selected is: the base station controller acquires the neighbor information of all the pico neighbors of the newly accessed pico base station, and acquires the newly accessed pico base station. Pico cell;

The base station controller compares the pico-cell to be screened with the preliminary neighbor information, and filters the pico-cell to be screened according to the screening principle to avoid co-channel interference and adjacent-channel interference, and determines the step of the pico-cell that can be supplemented. The base station controller compares the pico cell of the newly accessed pico base station with the neighboring cell information of all the pico neighbor cells of the newly accessed pico base station, and according to the screening principle for avoiding the occurrence of the same frequency and adjacent frequency interference, The newly accessed pico cell is screened to determine a pico cell that can be supplemented;

And the step of the base station controller updating the preliminary neighbor information according to the determined replenishable pico cell: the base station controller supplementing the determined replenishable micro cell to the newly accessed pico base station for comparison Neighbor information in the pico neighborhood.

The above method also has the following characteristics:

The base station controller compares the pico cell of the new pico base station with the neighboring cell information of all pico neighbor cells of the new pico base station, and performs the newly accessed pico cell according to the screening principle of avoiding the occurrence of the same frequency and adjacent frequency interference. The steps to screen and identify the picocells that can be replenished include:

The base station controller compares the newly accessed pico cell with the pico neighboring cell in turn, if a neighboring cell of the pico neighboring cell of the newly accessed pico base station has the same frequency as the pico cell of the newly accessed pico base station Point and the same color code, determining that the pico cell of the newly accessed pico base station is a pico cell in the neighbor cell information of the pico neighboring cell that cannot be added to the newly accessed pico base station; otherwise, the newly accessed pico base station The pico cell is a pico cell in the neighbor information of the pico neighboring cell that can be added to the newly accessed pico base station.

In order to solve the above problem, the present invention further provides a pico-cell neighboring area information updating apparatus, which is used for a base station controller, where the apparatus includes a storage module, a cell acquisition module, a neighboring area information acquisition module, a screening module, and an update module;

The storage module is configured to store a logical cell, a pico cell, and a neighboring cell configured in the base station controller. Information

The cell acquiring module is configured to obtain a logical cell or a pico cell to be filtered from the storage module; the neighboring area information acquiring module is configured to obtain preliminary neighboring cell information from the storage module;

The screening module is configured to compare the logical cell or the pico cell to be selected obtained by the cell acquiring module with the preliminary neighbor information obtained by the neighboring cell acquiring module, and according to the screening principle for avoiding co-channel interference and adjacent channel interference, Logging a logical cell or a pico cell to obtain a logical cell or a pico cell that is determined to be replenishable;

The update module is arranged to update the preliminary neighbor information based on the logical cell or pico cell that is determined to be replenished.

The above device also has the following features:

The device further includes a neighboring area scanning module and a neighboring area configuration module;

The logical cell to be filtered is all the logical cells configured by the base station controller, and the preliminary neighbor information is the neighboring area information of the pico base station;

The neighboring area scanning module is configured to scan a neighboring area of the pico base station;

The neighboring area configuration module is configured to complete the neighboring area configuration of the pico base station according to the neighboring area obtained by the neighboring area scanning module, and send the neighboring area information of the pico base station to the storage module;

The screening module is further configured to compare neighboring area information of the pico base station and the neighboring area information of the pico base station according to all the logical cells acquired by the cell acquiring module and the neighboring area information acquiring module, if the neighboring area information of the pico base station and the pico base station are compared If the logical cells have the same frequency point and the same color code, the logical cell is not regarded as a logical cell that can be supplemented; otherwise, the logical cell is regarded as a logical cell that can be supplemented;

The update module is further configured to, in accordance with the screening result of the screening module, sequentially add the logical cells that can be supplemented as pico neighbors to the neighbor information of the pico base station.

The above device also has the following features:

The device further includes an exit service message receiving module;

The logical cell to be filtered is a logical cell where the pico base station that exits the service is located; the preliminary neighboring cell information is the neighboring cell information of the pico neighboring cell of the pico base station that is out of service; The quit service message receiving module is configured to receive the quit service message sent by the pico base station; the screening module is further configured to: according to the logical cell where the pico base station is located and the neighboring area information acquiring module acquired by the cell acquiring module The neighboring cell information of the pico neighboring cell of the base station compares the logical cell where the pico base station exiting the service is located with the neighboring cell information of the pico neighboring cell, if the neighboring cell of the pico base station in the pico neighboring cell and the logic of the pico base station If the cell has the same frequency point and the same color code, it is determined that the logical cell of the pico base station is a logical cell that cannot be added to the neighboring cell information of the pico neighboring cell of the pico base station; otherwise, the logical cell of the pico base station can be added to a logical cell in the neighboring cell information of the pico neighboring cell of the pico base station;

The update module is further configured to, in accordance with the screening result of the screening module, sequentially add the logical cell that can be supplemented as the pico neighboring cell to the neighboring cell information of the pico neighboring cell of the pico base station.

The above device also has the following features:

The device further includes a base station access detection module and a neighboring area scanning module;

The pico cell to be filtered is a pico cell of the newly accessed pico base station; the preliminary neighbor information is the neighboring cell information of the pico neighboring cell of the new pico base station;

The base station access detection module is configured to detect a pico base station of the newly accessed network;

The neighboring area scanning module is configured to scan the neighboring area of the newly accessed pico base station, and send the neighboring area information of the pico neighboring area of the new pico base station to the storage module;

The screening module is further configured to: according to the pico cell of the newly accessed pico base station and the neighboring cell information of the pico neighboring cell of the newly accessed pico base station acquired by the neighboring cell information acquiring module, the new access pico The pico cell of the base station is compared with the pico neighboring cell of the newly accessed pico base station, and the pico cell of the newly accessed pico base station is filtered according to the screening principle of avoiding the occurrence of the same frequency and adjacent frequency interference. The neighboring area of the pico neighboring cell of the incoming pico base station has the same frequency point and the same color code as the pico d and the area of the newly accessed pico base station, and then determines that the pico cell of the newly accessed pico base station is not The pico cell in the neighboring cell information of the pico neighboring cell of the newly accessed pico base station; otherwise, the pico cell of the newly accessed pico base station is a pico cell in the neighboring cell information that can be added to the compared pico neighboring cell ;

The update module is further configured to, according to the screening result of the screening module, sequentially determine the neighboring area information of the pico neighboring area of the newly accessed pico base station, which is determined to be a pico neighboring area. Medium.

The above method and system can perform automatic neighbor update and greatly improve the handover success rate. In another embodiment, the method of replenishing the neighboring cell in the reverse direction solves the problem of the pico-neighbor interval switching, thereby reducing the probability of the mobile terminal dropping the call. In addition, the above methods and systems can be automatically completed by the BSC without manual participation, so the accuracy is high, and the manual management and maintenance workload is small. Moreover, there is no impact of switching between other stations due to the exit service of the base station. The present invention is applicable to mobile communication systems, especially GSM (Global System for Mobile communications).

BRIEF abstract

1 is a schematic diagram of a logical cell concept in the prior art;

2 is a flowchart of updating a neighboring cell of a logical cell according to an embodiment of the present invention;

3 is a flowchart of a neighboring cell update when a pico base station exits a service according to an embodiment of the present invention; FIG. 4 is a flowchart of a reverse update neighboring cell according to an embodiment of the present invention;

FIG. 5 is a schematic diagram of an apparatus for implementing neighbor cell update according to an embodiment of the present invention.

Preferred embodiment of the invention

The technical solutions of the present invention are described in detail below with reference to the accompanying drawings and specific embodiments thereof, and are not intended to limit the scope of the invention.

In order to make up for the deficiencies in the prior art application, it is ensured that two adjacent pico base stations that are not mutually arranged as pico neighbors can be switched. This embodiment proposes a neighbor update in the context of logical cell application. The method is to solve the problem that two pico base stations are adjacent but cannot be switched. The neighboring area update is to filter the logical cell or the pico cell to be screened according to the screening principle of avoiding the same frequency interference and adjacent frequency interference, and then the filtered logical cell or the pico cell is updated as a pico neighbor to the BSC (Basic Station) In the neighbor information on the Controller, the base station controller. Through this update and supplement method, the success rate of pico base station handover can be greatly improved, and the reduction is reduced. Word rate. Moreover, the neighboring area updating method in the embodiment of the present invention can be automatically completed by the system, and no manual participation is required, thereby avoiding the problem that the manual setting may be erroneous, so the accuracy is high, and the manual management and maintenance workload can be small.

In the present invention, the neighboring area information on the BSC includes the pico neighboring area scanned by the base station, and further includes the logical cell neighboring area. Because sometimes the base station may not scan the pico neighboring cells adjacent thereto, in order to ensure better handover and reselection, the logical cell neighboring zone is added to the neighboring cell information on the BSC in the present invention because of the logical cell neighboring In the area, the pico neighbors that are not swept by the base station can be added to the neighbor information through the form of a logical cell. If the mobile terminal is to switch from the current pico cell to the pico neighbor that is not scanned, if there is no logical cell neighbor, the handover cannot be completed. Because of the logical cell neighboring cell, the mobile terminal can switch from the current cell to the pico neighbor zone that is not scanned by the base station included in the logical cell neighboring cell, so that the handover can be performed because the logical cell neighboring zone includes This is not a micro-neighborhood scanned.

In order to implement handover of the mobile terminal from the pico cell to the logical cell neighboring cell, a switching channel is set in each pico cell, and the switching channel is always activated after being activated, and the switching channel does not perform voice and data services. When performing handover between the pico cell and the logical cell by the mobile terminal, since there are multiple cells of the same frequency point and the same color code under the logical cell, the mobile terminal does not know which specific pico cell to switch to, so mobile is required. The terminal first cuts into the handover channel, and knows which real pico cell is the target after the mobile terminal accesses. At this time, the mobile terminal performs an intra-cell handover in the picocell, and switches the mobile terminal to the target picocell. On an idle traffic channel, the handover channel in the original pico cell is vacated for use by other mobile terminals to cut into the logical cell neighborhood. Therefore, by setting the handover channel, the handover between the pico cell and the logical cell neighborhood can be realized.

Preferably, the neighbor information can be recorded in a neighbor list.

Correspondingly, the present invention further provides an apparatus for implementing the foregoing method, as shown in FIG. 5, for a base station controller, including a storage module, a cell acquisition module, a neighboring area information acquisition module, a screening module, and an update module;

The storage module is configured to store the logical cell and the neighboring cell information configured in the base station controller; the cell acquiring module is configured to acquire the logical cell or the pico cell to be selected; The neighboring area information obtaining module is configured to obtain preliminary neighboring area information;

The screening module is configured to compare the logical cell or the pico cell to be selected obtained by the cell acquiring module with the preliminary neighbor information obtained by the neighboring cell acquiring module, and adopt the filtering principle to avoid the occurrence of co-channel interference and adjacent channel interference. The cell or the pico cell is screened to obtain a logical cell or a pico cell that can be supplemented;

The update module is configured to update the preliminary neighbor information according to the logical cell or the pico cell that is determined to be supplementable.

The triggering conditions for performing neighbor cell update in the present invention include:

1. After the BSC completes the configuration of the neighboring area of a pico base station;

2. The pico base station is migrated or the network access failure requires the pico base station to exit the service;

3. The new ^敖 base station access network.

In addition, other trigger conditions may be used, such as the BSC periodically performing neighbor cell update.

Embodiment 1:

The main idea of the neighboring cell update method in this embodiment is: after the BSC (Basic Station Controller) completes the pico neighboring cell configuration of the pico base station, it automatically acquires all the logical cells configured in the BSC, and filters the logical cells. In order to prevent the occurrence of the same frequency and adjacent frequency interference, the filtered logical cell is written as a pico neighboring cell into the neighboring area information of the pico neighboring area under the BSC. Since the type of the logical cell neighboring cell is added to the neighboring cell information, the switching between the pico base stations and the updated neighboring cell information can improve the success rate of the switching.

In this embodiment, the BSC performs the pico-neighbor zone configuration of the pico base station, and the BSC scans the neighboring cell by the base station, and the BSC implements the manner in which the pico base station automatically configures the pico neighboring cell.

The method for adding a logical cell neighboring cell in the neighboring cell information in this embodiment may specifically include the following steps:

Step 1-1: The BSC obtains all logical cells configured in the BSC.

The logical cell is manually configured on the OMCR (Operation & Maintenance Center for Radio Operation and Maintenance Center), and then the data is synchronized to the BSC. In the library; therefore, the BSC can directly obtain all the logical cells configured under the BSC from its database. Step 1-2: The BSC filters the logical cells to prevent the occurrence of the same frequency and adjacent frequency interference. Step 1-3: The BSC adds the filtered logical cell to the neighbor information as a pico neighbor.

FIG. 2 is a flowchart showing an implementation of a method for updating a logical cell neighboring cell proposed in the embodiment, which includes the following steps:

Step 210: The BSC completes the pico neighbor configuration of a pico base station.

Step 220: The BSC obtains all logical cell information in the BSC.

Step 230: Take a logical cell;

In this case, when the logical cell is filtered, all the logical cells need to be traversed. Therefore, in this step, one of the unselected logical cells is selected; for example, it may be the first logical cell;

Step 240: Filter the logical cell according to the screening principle of avoiding co-channel interference and adjacent-channel interference, and determine whether the logical cell needs to be supplemented; if yes, go to step 250, otherwise go to step 260;

Preferably, in this embodiment, the screening principle for avoiding co-channel interference and adjacent-channel interference is to compare the logical cell with the neighboring area that the pico base station has scanned, if a logical cell has the same frequency as the scanned neighboring cell. If the point and the same color code are used, the logical cell is not added to the neighboring cell information as a pico neighboring cell. Otherwise, the logical cell is added as a pico neighboring cell to the neighboring cell information of the pico base station. The neighboring area that the pico base station has scanned includes a macro neighboring area and a pico neighboring area;

Step 250: Add the logical cell as a pico neighbor to the neighbor information of the pico cell;

Step 260: Determine whether all the logical cells in the BSC have completed the screening, if it is, go to step 280, otherwise go to step 270;

Step 270: Acquire the next logical cell, and return to step 240;

Step 280: End.

Correspondingly, the embodiment further provides an apparatus for implementing the foregoing method, for a base station controller, The storage module, the cell acquisition module, the neighboring area information acquisition module, the screening module, and the update module; the storage module is configured to store the logical cell and the neighboring area information configured in the base station controller; the cell acquisition module is configured to acquire the logical cell to be filtered. Or picocell;

The neighboring area information obtaining module is configured to obtain preliminary neighboring area information;

Further, the device further includes a neighboring area scanning module and a neighboring area configuration module;

The screening module compares the neighboring cell information of the pico base station acquired by the all the logical cell and the neighboring cell information acquiring module acquired by the cell acquiring module, and sequentially compares the logical cell with the scanned neighboring cell, if the neighboring cell and the logical cell have been scanned. If the same frequency point and the same color code are used, the logical cell is not regarded as a logical cell that can be supplemented; otherwise, the logical cell is regarded as a logical cell that can be supplemented; and the update module sequentially determines the filtering result according to the screening module. The supplemental logical cell is supplemented as a pico neighbor to the neighbor information of the pico base station.

Embodiment 2:

Due to the large number of pico base stations and flexible use, pico base stations are often migrated. Sometimes, the pico base station needs to be taken out of service because of network access failure. In the second embodiment of the present invention, the neighboring cell supplementation method can be used to avoid the problem, because a pico base station exits the service and affects the normal handover of other picocells in the logical cell where the pico base station is located.

FIG. 3 is a schematic diagram of the application of the neighboring cell update in the pico base station to exit the service according to the second embodiment of the present invention, that is, when the pico base station exits the service, the neighboring cell supplementation is also required, and the steps include the following steps:

Step 310: The BSC receives the exit service message sent by the pico base station.

Step 320: The BSC obtains all the pico neighbor cells of the pico base station that exits the service, and acquires neighboring cell information of the pico neighboring cell.

Step 330: The BSC obtains the neighboring cell information of one of the pico neighboring cells of the pico base station. Step 340: The BSC determines, according to the screening principle of avoiding the occurrence of the same frequency and adjacent frequency interference, whether the logical cell where the femto base station is to be replenished needs to be added to In the neighbor information of the acquired pico neighboring area, if necessary, step 350 is performed, otherwise step 360 is performed;

Preferably, in this embodiment, the screening principle for avoiding co-channel interference and adjacent-channel interference is to compare the logical cell where the pico cell exiting the service is located with all neighbor information of the pico neighboring cell that performs the judgment, if the logic If the cell and the neighboring cell of the pico neighboring cell have the same frequency point and the same color code, the logical cell is not added as the pico neighboring cell to the neighboring cell information of the pico neighboring cell that is determined, otherwise the logical cell is not used. The pico neighbor is added to the neighbor information of the pico base station.

Step 350: The BSC adds the logical cell neighboring area as a pico neighboring area to the neighboring area information of the pico neighboring area;

Step 360: The BSC determines whether all the pico neighbors of the pico base station that has exited the service have been processed. If yes, go to step 380, otherwise go to step 370;

Step 370: Acquire the next pico neighbor of the pico base station that exits the service, and return to step 340; Step 380: End.

Correspondingly, the embodiment further provides an apparatus for implementing the foregoing method, which is used by a base station controller, and includes a storage module, a cell acquisition module, a neighboring area information acquisition module, a screening module, and an update module.

The storage module is configured to store logical cell and neighbor information configured in the base station controller; The cell acquiring module is configured to acquire a logical cell or a pico cell to be screened;

And an update module, configured to add a logical cell or a pico cell that can be supplemented as a pico neighbor to the preliminary neighbor information.

Further, the apparatus further includes an exit service message receiving module;

The logical cell to be filtered is the logical cell where the pico base station that is logged out of the service is located; the preliminary neighbor information is the neighboring area information of the pico neighboring cell of the pico base station that is out of service;

The exit service message receiving module is configured to receive the exit service message sent by the pico base station; the screening module obtains the pico base station of the exiting service obtained by the logical cell where the pico base station is located and the neighboring area information acquiring module acquired by the cell acquiring module The neighboring cell information of the neighboring cell compares the logical cell where the pico base station exiting the service is located with the neighboring cell information of the pico neighboring cell, if the logical cell has the same frequency point as a neighboring cell of the compared pico neighboring cell And the same color code, determining that the logical cell is a logical cell that cannot be added to the neighboring cell information of the compared pico neighboring cell; otherwise, the logical cell can be added to the neighboring cell information of the compared pico neighboring cell. Logical cell

The update module is configured to supplement the logical cell or the pico cell that can be supplemented as a pico neighbor to the preliminary neighbor information.

Embodiment 3:

Due to the complexity of the wireless environment, it is possible that two neighboring pico base stations A and B may have a problem of detecting the pico neighbors in a unidirectional manner, such as: In the frequency scanning phase, the pico base station A can detect the adjacent picocells. The existence of B, but the pico base station B does not detect the presence of the pico-cell A; or when the pico base station A and the pico base station B are powered on at the same time, it is also possible that the above-mentioned micro-neighbor region can be detected only in one direction. In order to improve the search accuracy of the neighboring area, the third embodiment of the present invention proposes A method for replenishing the neighboring cell in the reverse direction, that is, after the neighboring cell table of the pico cell is generated, the pico cell is backfilled as a pico neighboring cell to the neighboring cell of the pico neighboring cell of the pico cell, thereby Improve the switching success rate. The method for the reverse update of the neighboring area is as shown in FIG. 4, and specifically includes the following steps: Step 410: A new pico base station accesses the network under the BSC;

Step 420: The BSC acquires all pico neighbor cells of the newly accessed pico base station.

Step 430: The BSC acquires neighboring area information of one of the micro neighboring cells.

Step 440: Determine whether there is information of the pico cell in the neighbor information of the pico neighbor according to the screening principle of avoiding the same frequency and adjacent frequency interference. If not, execute step 450; otherwise, perform step 460;

Preferably, in this embodiment, the screening principle for avoiding co-channel interference and adjacent-channel interference is to compare the newly-accessed pico cell with the neighboring cell information of the determined pico neighbor, if the pico cell and the pico neighbor If a neighboring cell has the same frequency point and the same color code, the pico cell is not added as a pico neighboring cell to the neighboring cell information of the pico neighboring cell to be judged. Otherwise, the pico cell is used as a pico neighboring cell. Add to the neighbor information of the pico base station.

Step 450: Add the pico cell to the neighbor information of the pico neighbor;

Step 460: It is determined whether all the pico neighbors of the pico cell have been processed, if not, step 470 is performed, otherwise step 480 is performed;

Step 470: Take the neighbor information of the next pico neighborhood in the pico cell, and perform step 440; Step 480: End.

Correspondingly, the embodiment further provides an apparatus for implementing the foregoing method, where the base station controller includes a storage module, a cell acquisition module, a neighboring area information acquisition module, a screening module, and an update module; and the storage module is configured to store the base station. The logical cell and the neighboring cell information configured in the controller; the cell acquiring module is configured to acquire the logical cell or the pico cell to be filtered;

The screening module compares the logical cell or the pico cell to be selected obtained by the cell acquiring module with the preliminary neighboring cell information acquired by the neighboring cell acquiring module, and treats the logical cell to be filtered according to the screening principle for avoiding co-channel interference and adjacent channel interference. Or pico-cells for screening, obtaining confirmation can complement Logical cell or pico cell;

The update module is configured to supplement the logical cell or the pico cell that can be supplemented by the determination as a pico neighbor to the preliminary neighbor information.

Further, the device further includes a base station access detection module and a neighboring area scanning module;

The screening module sequentially compares the newly accessed picocells according to the picocell of the newly accessed pico base station acquired by the cell acquiring module and the neighboring area information of the pico neighboring cell of the newly accessed pico base station acquired by the neighboring area information acquiring module. The pico neighboring cell is compared, and the newly accessed pico cell is filtered according to the screening principle of avoiding the same frequency and adjacent frequency interference, if a neighboring cell of the compared pico neighboring cell and the newly accessed pico cell have The same frequency point and the same color code determine that the newly accessed pico cell is a pico cell that cannot be added to the neighbor cell information of the compared pico neighbor; otherwise, the pico cell can be added to the compared pico neighbor a picocell in the neighborhood information of the district;

The update module sequentially adds the picocells that can be supplemented as pico neighbors to the neighboring cell information of the compared pico neighbors according to the screening result of the screening module.

The embodiment of the present invention provides a method for adding a logical cell neighbor type or updating to a logical cell neighbor type when the pico base station parameters are configured and when the pico base station exits the service, and after the new access of the pico base station The method for updating the neighboring cell improves the handover success rate; and the implementation of the method proposed in the present invention is automatically performed by the BSC without manual participation; and the method solves the problem that the handover is unsuccessful due to manual configuration errors. This can improve the quality of the call.

The above-mentioned specific embodiments and application examples are not intended to further limit the technical solutions of the present invention. It should be clear to those skilled in the art that equivalent replacements or corresponding improvements to the features of the patents are still within the scope of the patent. Industrial Applicability The method and system provided by the present invention can perform automatic neighborhood update, which greatly improves the handover success rate. In addition, the method of replenishing the neighboring cell in the reverse direction solves the problem of the handover of the pico neighbor interval, thereby reducing the probability of the mobile terminal dropping the call. The above method and system can be automatically completed by the BSC without manual participation, so the accuracy is high, and the manual management and maintenance workload is small. Moreover, the handover with other base stations is not affected by the exit service of the base station. The invention is applicable to mobile communication systems, especially GSM.

Claims

Claim

1. A method for updating neighboring area information of a pico-cell, comprising:

The base station controller acquires preliminary neighboring cell information, and obtains a logical cell or a pico cell to be filtered; the base station controller compares the logical cell or the pico cell to be filtered with the preliminary neighboring cell information, according to avoiding The screening principle of the same-frequency interference and the adjacent-frequency interference is used to filter the logical cell or the pico cell to be selected, and determine a logical cell or a pico cell that can be supplemented;

The base station controller updates the preliminary neighbor information according to the determined logical cell or pico cell that can be supplemented.

2. The method according to claim 1, before the step of the base station controller acquiring the preliminary neighbor information and obtaining the logical cell to be filtered, the method further includes:

The base station controller completes a neighboring cell configuration of the pico base station;

The preliminary neighboring cell information is the neighboring cell information of the micro-adjacent area of the 敖 base station; the logical cell to be filtered is all the logical cells configured under the base station controller;

The step of the base station controller acquiring the preliminary neighboring cell information and acquiring the logical cell to be filtered is: the base station controller acquiring the neighboring cell information of the pico neighboring cell of the pico base station, and acquiring the configuration of the base station controller All logical cells;

The base station controller compares the to-be-selected logical cell with the preliminary neighboring cell information, and filters the logical cell or the pico cell to be selected according to a screening principle that avoids co-channel interference and adjacent-channel interference. The step of determining a logical cell that can be supplemented is: the base station controller sequentially compares all logical cells configured under the control of the base station with neighboring information of the pico neighboring cell of the pico base station, according to avoiding co-channel interference The screening principle of the adjacent-channel interference is used to filter all the logical cells configured under the control of the base station, and determine a logical cell that can be supplemented;

The step of the base station controller updating the preliminary neighboring area information according to the determined replenishable logical cell is: the base station controller adding the logical cell capable of being supplemented as a pico neighboring cell to the In the neighbor information of the pico base station.

3. The method of claim 2, wherein The base station controller sequentially compares all logical cells configured under the control of the base station with neighboring cell information of the pico base station, and configures the base station according to a screening principle that avoids co-channel interference and adjacent frequency interference. The steps of all logical cells to filter and determine the logical cells that can be supplemented include:

The base station controller compares the logical cell configured under the control of the base station with the neighboring cell information of the pico base station, if the logical cell configured under the control of the base station has the same frequency point as the neighboring cell of the pico base station And the same color code, the logical cell configured under the control of the base station is not used as a logical cell that can be supplemented; otherwise, the logical cell configured under the control of the base station is used as a logical cell that can be supplemented.

The method of claim 1, before the step of the base station controller acquiring the preliminary neighbor information and obtaining the logical cell to be filtered, the method further includes:

The preliminary neighboring cell information is the neighboring cell information of the micro-adjacent area of the 敖 base station; the logical cell to be filtered is the logical cell where the pico base station is located;

The step of the base station controller acquiring the preliminary neighboring cell information and obtaining the logical cell to be filtered is: the base station controller acquiring the neighboring cell information of all the pico neighbor cells of the pico base station, and acquiring the logic of the pico base station Community

The base station controller compares the to-be-selected logical cell with the preliminary neighboring cell information, and filters the logical cell to be screened according to a screening principle that avoids co-channel interference and adjacent-channel interference, and determines that The step of the supplementary logical cell is: the base station controller compares the logical cell where the pico base station is located with the neighboring area information of all the pico neighboring cells of the pico base station, according to avoiding the occurrence of the same frequency and adjacent frequency interference. The screening principle filters the logical cell where the pico base station is located, and determines a logical cell that can be supplemented;

And the step of the base station controller updating the preliminary neighbor information according to the determined replenishable logical cell: the base station controller adding the determined replenishable logical cell to all of the pico base station Neighbor information in the pico neighborhood.

5. The method of claim 4, wherein

The base station controller sequentially, in sequence, the logical cell where the pico base station is located, and the pico base station The neighboring cell information of all the pico neighboring cells are compared, and the logical cell in which the pico base station is located is filtered according to the screening principle of avoiding the occurrence of the same frequency and adjacent frequency interference, and the steps of determining the logical cell that can be supplemented include:

The base station controller compares the logical cell where the pico base station is located with the neighboring cell information of the pico neighboring cell of the pico base station, if a neighboring cell of the pico neighboring cell of the pico base station and the pico base station If the logical cell in the same cell has the same frequency point and the same color code, it is determined that the logical cell where the pico base station is located is a logical cell that cannot be added to the neighboring cell information of the pico neighboring cell of the pico base station; The logical cell where the pico base station is located is a logical cell that can be added to the neighboring cell information of the pico neighboring cell of the pico base station.

The method of claim 1, before the step of the base station controller acquiring the preliminary neighbor information and obtaining the pico cell to be screened, the method further includes:

A new pico base station accesses the network under the base station controller;

The preliminary neighboring cell information is the neighboring cell information of the pico neighboring cell of the newly accessed pico base station; the pico cell to be filtered is the pico cell of the newly accessed pico base station;

The step of the base station controller acquiring the preliminary neighbor information and obtaining the pico cell to be selected is: the base station controller acquiring the neighbor information of all the pico neighbors of the newly accessed pico base station, and acquiring the new a pico cell of the connected pico base station;

The base station controller compares the pico-cell to be screened with the preliminary neighbor information, and selects the pico-cell to be screened according to a screening principle that avoids co-channel interference and adjacent-channel interference, and determines The step of replenishing the pico cell is: the base station controller compares the pico cell of the newly accessed pico base station with the neighboring cell information of all pico neighbor cells of the newly accessed pico base station, according to avoiding The principle of selecting the same frequency and adjacent frequency interference, screening the newly accessed pico-cells, and determining the pico-cells that can be supplemented;

And the step of the base station controller updating the preliminary neighbor information according to the determined replenishable pico cell: the base station controller supplementing the determined replenishable micro cell to the newly accessed Neighbor information of the pico neighbor of the pico base station.

7. The method of claim 6, wherein

The base station controller sequentially sequences the pico cell of the new pico base station with the new pico base Comparing the neighboring cell information of all the pico neighboring cells of the station, and filtering the newly accessed picocell according to the screening principle of avoiding the occurrence of the same frequency and adjacent frequency interference, and determining the picocells that can be supplemented include:

The base station controller compares the pico cell of the new pico base station with the neighbor information of all pico neighbors of the pico base station, if a neighbor of the pico neighbor of the newly accessed pico base station The cell and the pico cell of the newly accessed pico base station have the same frequency point and the same color code, and then determine that the pico cell of the newly accessed pico base station is a pico that cannot be added to the new pico base station. a pico cell in the neighboring cell information of the neighboring cell; otherwise, the pico cell of the newly accessed pico base station is a pico cell in the neighboring cell information of the pico neighboring cell of the newly accessed pico base station.

8. A picocell neighboring area information updating apparatus, configured to be used by a base station controller, where the apparatus includes a storage module, a cell obtaining module, a neighboring area information acquiring module, a screening module, and an updating module; wherein the storage module is configured to be stored a logical cell, a pico cell, and neighboring cell information configured in the base station controller;

The cell acquiring module is configured to acquire a logical cell or a pico cell to be filtered from the storage module;

The neighboring area information acquiring module is configured to obtain preliminary neighboring area information from the storage module; the screening module is configured to set the logical cell or the pico cell to be filtered obtained by the cell acquiring module, and the neighboring area Obtaining preliminary neighbor information obtained by the module for comparison, and screening the logical cell or the pico cell to be screened according to the screening principle for avoiding co-channel interference and adjacent channel interference, and obtaining a logical cell or a pico cell that can be complemented. ;

The update module is configured to update the preliminary neighbor information according to the logical cell or pico cell that is determined to be supplementable.

9. The apparatus of claim 8, the apparatus further comprising a neighboring area scanning module and a neighboring area configuration module;

The logical cell to be screened is all logical cells configured by the base station controller, and the preliminary neighboring cell information is neighboring cell information of the 敖 base station;

The neighboring area scanning module is configured to scan a neighboring area of the pico base station; The neighboring area configuration module is configured to complete the neighboring area configuration of the pico base station according to the neighboring area obtained by the neighboring area scanning module, and send the neighboring area information of the pico base station to the storage module; And determining, according to the neighboring cell information of the pico base station, the neighboring cell information of the pico base station and the neighboring cell information acquired by the neighboring cell information acquiring module, and sequentially comparing the neighboring cell information of the logical cell and the pico base station, if If the neighboring cell of the pico base station has the same frequency point and the same color code as the logical d and the area, the logical cell is not regarded as a logical cell that can be supplemented; otherwise, the logical cell can be supplemented Logical cell

The update module is further configured to, according to the screening result of the screening module, sequentially add the logical cell that can be supplemented as a pico neighboring cell to the neighboring cell information of the pico base station.

The device of claim 8, the device further comprising an exit service message receiving module, wherein the logical cell to be filtered is a logical cell in which the pico base station is located; Neighbor information of the pico neighboring area of the pico base station;

The exit service message receiving module is configured to receive an exit service message sent by the pico base station;

The screening module is further configured to: according to the logical cell where the pico base station is located, and the neighboring area information of the pico neighboring area of the pico base station acquired by the neighboring area information acquiring module, The logical cell in which the pico base station is located is compared with the neighboring cell information of the pico neighboring cell of the pico base station, if a neighboring cell of the pico neighboring cell of the pico base station and the logical cell of the pico base station have the same And determining, by the frequency point and the same color code, the logical cell of the pico base station is a logical cell that cannot be added to the neighboring cell information of the pico neighboring cell of the pico base station; otherwise, the logical cell of the pico base station can be added to a logical cell in the neighboring cell information of the pico neighboring cell of the pico base station;

And the updating module is further configured to, according to the screening result of the screening module, sequentially add the determined logical cell that can be supplemented as a pico neighboring cell to the neighboring cell information of the pico neighboring cell of the pico base station.

The device of claim 8, the device further comprising a base station access detection module and a neighboring area scanning module;

The pico cell to be screened is a pico cell of a newly accessed pico base station; the preliminary neighbor The area information is neighboring area information of the pico neighboring area of the newly accessed pico base station;

The base station access detection module is configured to detect the newly accessed pico base station;

The neighboring area scanning module is configured to scan the neighboring area of the newly accessed pico base station, and send neighboring area information of the pico neighboring area of the newly accessed pico base station to the storage module;

The screening module is further configured to: according to the pico cell of the newly accessed pico base station acquired by the cell acquiring module, and the neighbor of the pico neighboring cell of the newly accessed pico base station acquired by the neighboring cell information acquiring module The area information, the pico cell of the newly accessed pico base station is sequentially compared with the pico neighboring cell of the newly accessed pico base station, and the new connection is performed according to a screening principle for avoiding the occurrence of the same frequency and adjacent frequency interference. The pico cell of the incoming pico base station is filtered, if a neighboring cell of the pico neighboring cell of the newly accessed pico base station and the pico cell of the newly accessed pico base station have the same frequency point and the same color code, Determining that the pico cell of the newly accessed pico base station is a pico cell in the neighboring cell information of the pico neighboring cell that cannot be supplemented to the newly accessed pico base station; otherwise, the pico base station of the newly accessed pico base station The cell is a pico cell in the neighboring cell information of the pico neighboring cell that can be added to the newly accessed pico base station;

The update module is further configured to, according to the screening result of the screening module, sequentially add the determined replenishable pico cell as a pico neighboring cell to the neighboring cell information of the pico neighboring cell of the newly accessed pico base station. .