WO2013123748A1 - 终端邻区列表的处理方法和基站控制器 - Google Patents
终端邻区列表的处理方法和基站控制器 Download PDFInfo
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- WO2013123748A1 WO2013123748A1 PCT/CN2012/077422 CN2012077422W WO2013123748A1 WO 2013123748 A1 WO2013123748 A1 WO 2013123748A1 CN 2012077422 W CN2012077422 W CN 2012077422W WO 2013123748 A1 WO2013123748 A1 WO 2013123748A1
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- 238000000034 method Methods 0.000 title claims abstract description 26
- 230000004913 activation Effects 0.000 description 3
- 238000003672 processing method Methods 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 1
- 230000001413 cellular effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 238000010295 mobile communication Methods 0.000 description 1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/0005—Control or signalling for completing the hand-off
- H04W36/0083—Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists
- H04W36/00835—Determination of neighbour cell lists
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- the present invention relates to a cellular mobile communication system, and in particular, to a method for processing a terminal neighbor list and a base station controller. Background technique
- the self-interference system of the Code Division Multiple Access (CDMA) system uses the soft handover technique to reduce the interference of the same frequency.
- the terminal measures and reports the pilot strength information of the neighboring cell, and the base station controller (Base Station Controller abbreviated as BSC) determines whether to perform handover based on the reported pilot information.
- BSC Base Station Controller abbreviated as BSC
- the terminal needs to continuously measure the quality of the current channel and the neighboring channel of the neighboring cell, and the neighboring cells need to be measured by the terminal, which is specified by the neighboring cell list delivered by the BSC.
- a neighbor list needs to be maintained for each cell to ensure that the terminal in the range searches for the efficiency of the neighboring signal strength.
- the terminal it is also necessary to maintain a neighbor list: the mobile phone is in an idle state, and the BSC informs the current cell and its neighboring cell condition of the mobile phone through the overhead information of the control channel; when the mobile phone is in the traffic channel, the BSC updates the message through the neighboring cell of the traffic channel. Notify the current neighborhood of the phone.
- the CDMA EVDO air interface protocol stipulates that the mobile phone's neighbor list can support 31. Due to the complexity of the wireless environment in the city, the neighboring area tends to increase. Especially in the scenario of multi-party handover, the neighbor list of the terminal is the union of the set of neighbors of the active set cell, so the neighbor list update will involve the neighbor. For the merging problem of the district, the number of neighboring areas merged according to the configuration may greatly exceed the maximum number of air interface supports, so that some neighboring areas need to be discarded. Most of the current methods are only judged according to certain strategies, such as according to the neighboring areas. The number of occurrences determines its priority, but these methods are determined by static configuration, which often deviates from the actual scene, and there is a case where a strong pilot search does not result in a dropped call.
- condition a the accuracy of condition a is not high, and it is impossible to judge the direction in which the user will move simply by the position of the current user; for condition b, it depends entirely on the correctness of the configuration of the neighboring cell of the BSC side, and there is a certain Limitations.
- the embodiment of the present invention provides a method for processing a neighboring cell list of a terminal and a base station controller, so as to overcome the problem that the neighboring cell list provided by the existing BSC is deviated from the actual scenario.
- the embodiment of the present invention provides a method for processing a neighboring cell list of a terminal, where the method includes: the base station controller (BSC) sorts the priority of the neighboring cell of the terminal according to the historical handover information of the saved terminal or the neighboring cell information of the cell;
- BSC base station controller
- the BSC performs a round-off of the terminal neighboring cell in descending order of priority to generate the terminal neighboring cell list.
- the step of the BSC sorting the priority of the neighboring cell of the terminal according to the saved historical switching information includes:
- the BSC searches for the historical switch record set similar to the current active set from the historical switch information, and counts the number of times the cell is switched according to the history switch record set. The higher the number of history switch times, the higher the priority of the switch plus cell. .
- the step of the BSC searching for the historical switch record set similar to the current active set from the historical switch information includes:
- the BSC searches for the historical switch record set containing the same d and area from the active set in the active set in the historical switch information, and finds the pilot strength difference from the corresponding active cell in the historical switch record set containing the same cell.
- a historical switch record set whose value is within a predetermined threshold.
- the method before the step of the BSC sorting the priority of the neighboring cell of the terminal according to the saved historical switching information, the method further includes:
- the BSC records and saves the history switching information.
- the BSC performs priority on the neighboring cell of the terminal according to the neighboring cell information of the saved cell. Sorting includes:
- the BSC obtains the neighboring cell list information of the active centralized cell after the current handover, and counts the number of occurrences of the common neighboring cell of the active centralized cell, and the higher the number of times, the higher the priority of the common neighboring cell.
- An embodiment of the present invention provides a base station controller (BSC), where the BSC includes:
- a sorting module configured to sort the priority of the neighboring area of the terminal according to the historical switching information of the saved terminal or the neighboring area information of the cell;
- a generating module configured to: after the terminal neighboring area is selected in a high-to-low priority order, the terminal neighboring list is generated.
- the sorting module is configured to: find a historical switch record set similar to the current active set from the historical switch information, and separately count the number of times the cell is switched according to the history switch record set, and the more the history switch times The higher the priority of switching the added cell.
- the sorting module is configured to find a historical switch record set similar to the current active set from the history switch information in the following manner: searching from the active set in the history switch information to including the same cell history as the current active set Switching the recordset, and searching from the historical switch record set containing the same cell to the historical switch record set whose pilot strength difference value of the cell corresponding to the current active set is within a predetermined threshold.
- the BSC further includes: a saving module configured to save the history switching information.
- the ordering module is configured to: obtain neighboring cell list information of the active centralized cell after the current switching, and count the number of occurrences of the common neighboring cell of the active centralized cell, and the more times the common neighboring cell has the priority The higher the level.
- the processing method of the terminal neighbor list and the base station controller can provide a more reasonable neighbor list information for the terminal, thereby improving the handover success rate and reducing system call drop.
- FIG. 1 is a flowchart of an embodiment of a method for processing a neighbor list according to the present invention
- FIG. 2 is a schematic structural view of an embodiment of a BSC according to the present invention. Preferred embodiment of the invention
- An embodiment of the present invention provides a method for processing a neighboring cell list of a terminal, where the method includes: Step 101: The BSC records and saves historical switching information.
- This step is an optional step.
- the data center of the BSC collects historical switch information to form the basic data of the analysis: A switch occurs and the following information is recorded:
- (1) original active set cell information including cell identity ASi, pilot strength Pi;
- Step 102 When the handover occurs, the BSC sorts the priority of the neighboring cell of the terminal according to the history switching information of the saved terminal or the neighboring cell information of the cell, and selects the neighboring cell of the terminal according to the order of priority from high to low. A list of terminal neighbors.
- NB be the union of the above list: NB ⁇ nb ⁇ nb 2 nb k ⁇
- the BSC queries from the data center to the historical switch record set that is similar to the current active set, and calculates the number of nb k as the number of cells to be switched.
- the statistics are P k , and the meaning is that the terminal in the scenario judges the data according to the data.
- the probability of the neighboring cell moving, the greater the value, the greater the weight given to the neighboring cell; this step is to assist in optimizing the mobile phone neighbor list according to the statistics of the live network.
- the sorting, by the BSC, the priority of the neighboring cell of the terminal according to the neighboring cell information of the saved cell further includes: the BSC obtaining the neighboring cell list information of the active centralized cell after the current handover, and collecting the common The number of occurrences of neighboring cells, the higher the number of times, the higher the priority of the common neighboring cell.
- nbi is the common neighbor of the active centralized cell
- C k is the number of times nb k appears.
- AS ⁇ oAS 2 is configured!
- ⁇ is the neighboring cell
- the neighboring cell nb k in the neighboring cell set N is weighted according to the following conditions: The larger the neighboring cell weight is, the larger the C k is, the meaning is that the neighboring cell acts as a common neighbor of the active set cell In the area, the probability of the AT switching to the cell is also greater.
- the BSC intercepts the first 31 as the neighbor list sent to the terminal in the order of priority from high to low; the BSC sends the neighbor list to the terminal.
- the terminal can be provided with a more reasonable neighbor list, which improves the handover success rate and reduces dropped calls.
- FIG. 2 it is a schematic structural diagram of an embodiment of a BSC according to the present invention.
- the BSC includes a sorting module 21 and a generating module 22, where:
- a sorting module configured to sort the priority of the neighboring area of the terminal according to the historical switching information of the saved terminal or the neighboring area information of the cell;
- the generating module is configured to perform the rounding off of the terminal neighboring area in descending order of priority to generate the terminal neighboring cell list.
- the sorting module is configured to: find a historical switch record set similar to the current active set from the historical switch information, and separately count the number of times the cell is switched according to the history switch record set, and the more the history switch times The higher the priority of the handover cell is, or the neighbor cell list information of the active set cell after the current handover is obtained, and the number of occurrences of the common neighbor cell of the active set cell is counted, and the more common the neighbor cell priority The higher the level.
- the generating module is configured to find a historical activation set similar to the current active set from the historical switching information in the following manner: searching from the active set in the historical switching information to the historical switching record including the same cell as the current active set And collecting, by the historical switch record set including the same cell, a history switch record set whose pilot strength difference value of the cell corresponding to the current active set is within a predetermined threshold.
- the BSC further includes: a saving module 23 configured to save the history switching information.
- the BSC can provide a more reasonable neighbor list for the terminal, improve the handover success rate, and reduce the call drop.
- the specific implementation process can be seen in FIG. 1 , and details are not described herein again.
- the processing method of the terminal neighbor list and the base station controller can provide a more reasonable neighbor list information for the terminal, thereby improving the handover success rate and reducing system call drop.
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Abstract
一种终端邻区列表的处理方法以及BSC，该方法包括：BSC根据保存的终端的历史切换信息或小区的邻区信息对终端邻区的优先级进行排序；所述BSC按优先级由高到低的顺序对所述终端邻区进行取舍后生成所述终端邻区列表。该方法可以为终端提供更合理的邻区列表信息，从而提高了切换成功率，减少系统掉话。
Description
终端邻区列表的处理方法和基站控制器
技术领域
本发明涉及蜂窝移动通信系统， 尤其涉及一种终端邻区列表的处理方法 和基站控制器。 背景技术
码分多址（ Code Division Multiple Access, 简称 CDMA ) 系统的自干扰 系统是通过软切换技术来减小同频的干扰， 终端来测量并上报周围邻区小区 的导频强度信息， 由基站控制器（ Base Station Controller简称 BSC )根据上报 的导频信息来判决是否要进行切换。
在切换过程中，终端需要不断测量当前所处小区和邻区前向信道的质量， 而终端需要对哪些邻区进行测量， 是通过 BSC下发的邻区列表所规定的。 对 于 BSC, 需要为每个小区维护一个邻区列表， 以保证在该范围的终端搜索邻 区信号强度的效率。 对于终端， 也需要维护一个邻区列表： 手机在空闲状态， BSC通过控制信道的开销信息告知手机当前的小区及其邻区情况； 手机在业 务信道时， BSC通过业务信道的邻区更新消息来通知手机当前的邻区情况。
CDMA EVDO空口协议规定， 手机的邻区列表可以支持 31个。 由于城 市的无线环境复杂， 邻区趋于不断增加的趋势， 特别在多方切换的场景下， 终端的邻区列表是激活集小区的邻区集合的并集， 所以邻区列表更新将涉及 到邻区的合并问题， 根据配置合并的邻区个数可能大大超过空口支持最大个 数， 这样就需要舍去一些邻区， 目前大多数的做法仅仅是根据一定的策略来 判断， 如根据邻区的出现次数来决定其优先级， 但是这些方法是依靠静态配 置来决定， 往往跟现实的场景有偏差， 会发生强导频搜索不到导致掉话的情 况。
欧洲专利 EP1487230中描述了邻区合并的一种算法， 综合考虑了激活集 中导频的强度和邻区的出现频度的高低两个因素， 得到一个邻区的权重， 根 据该权重来决定邻区列表； 该算法的两个因素： a.导频强度越大， 如果此时
终端靠近哪一个小区， 认为这个小区的邻区优先级比较高； b.出现频度越高， 说明该邻区为公共邻区， 优先级比较高； 这两个因素一定程度上提高邻区的 准确性， 但是另一方面， 对于条件 a准确度不高， 无法简单通过当前用户的 位置来判断用户将移动的方向； 对于条件 b, 完全依赖于 BSC侧小区邻区配 置的正确性， 有一定的局限性。 发明内容
本发明实施例提供了一种终端邻区列表的处理方法和基站控制器， 以克 服现有的 BSC为终端提供的邻区列表与现实的场景有偏差的问题。
本发明实施例提供了一种终端邻区列表的处理方法， 该方法包括： 基站控制器 （BSC )根据保存的终端的历史切换信息或小区的邻区信息 对终端邻区的优先级进行排序；
所述 BSC按优先级由高到低的顺序对所述终端邻区进行取舍后生成所述 终端邻区列表。
优选地， 所述 BSC根据保存的历史切换信息对终端邻区的优先级进行排 序的步骤包括：
所述 BSC 从历史切换信息中查找到与当前激活集相似的历史切换记录 集， 根据所述历史切换记录集分别统计切换加小区的次数， 历史切换次数越 多的切换加小区的优先级越高。
优选地， 所述 BSC从历史切换信息中查找到与当前激活集相似的历史切 换记录集的步骤包括：
所述 BSC从历史切换信息中的激活集中查找到与当前激活集包含相同 d、 区的历史切换记录集， 从包含相同小区的历史切换记录集中查找到与当前激 活集中对应小区的导频强度差值在预定阔值内的历史切换记录集。
优选地， 所述 BSC根据保存的历史切换信息对终端邻区的优先级进行排 序的步骤之前， 所述方法还包括：
所述 BSC记录并保存所述历史切换信息。
优选地， 所述 BSC根据保存的小区的邻区信息对终端邻区的优先级进行
排序包括：
所述 B SC获得当前切换后的激活集中小区的邻区列表信息， 统计所述激 活集中小区的共同邻区出现的次数，次数越多的所述共同邻区的优先级越高。
本发明实施例提供了一种基站控制器（BSC ) ， 该 BSC包括：
排序模块， 其设置为根据保存的终端的历史切换信息或小区的邻区信息 对终端邻区的优先级进行排序；
生成模块， 其设置为按优先级由高到低的顺序对所述终端邻区进行取舍 后生成所述终端邻区列表。
优选地， 所述排序模块是设置为： 从历史切换信息中查找到与当前激活 集相似的历史切换记录集， 根据所述历史切换记录集分别统计切换加小区的 次数， 历史切换次数越多的切换加小区的优先级越高。
优选地， 所述排序模块是设置为以如下方式从历史切换信息中查找到与 当前激活集相似的历史切换记录集： 从历史切换信息中的激活集中查找到与 当前激活集包含相同小区的历史切换记录集， 从包含相同小区的历史切换记 录集中查找到与当前激活集中对应小区的导频强度差值在预定阔值内的历史 切换记录集。
优选地，所述 BSC还包括：保存模块，其设置为保存所述历史切换信息。 优选地， 所述排序模块是设置为： 获得当前切换后的激活集中小区的邻 区列表信息， 统计所述激活集中小区的共同邻区出现的次数， 次数越多的所 述共同邻区的优先级越高。
上述终端邻区列表的处理方法和基站控制器， 可以为终端提供更合理的 邻区列表信息， 从而提高了切换成功率， 减少系统掉话。 附图概述
图 1为本发明邻区列表的处理方法实施例的流程图;
图 2为本发明 BSC实施例的结构示意图。
本发明的较佳实施方式
下文中将结合附图对本发明的实施例进行详细说明。 需要说明的是， 在 不冲突的情况下， 本申请中的实施例及实施例中的特征可以相互任意组合。
本发明实施例提供了一种终端邻区列表的处理方法， 该方法包括： 步骤 101、 BSC记录并保存历史切换信息；
该步为可选步骤， BSC的数据中心收集历史切换信息， 以构成分析的基 础数据： 发生一次切换， 记录以下信息：
( 1 )原激活集小区信息， 包括小区标识 ASi、 导频强度 Pi;
( 2 )切换加小区信息， 包括小区标识 C-Addi; ( 3 )切换成功或者失败； 通过该步骤， H没一次切换加， 原激活集小区 id为 300、 301 , 切换加 的小区为 302、 303、 304 , 则釆集到的记录数据如表 1所示：
表 1 一次切换加后记录的数据
步骤 102、 切换发生时， BSC根据保存的终端的历史切换信息或小区的 邻区信息对终端邻区的优先级进行排序， 按优先级由高到低的顺序对终端邻 区进行取舍后生成所述终端邻区列表。
其中， 所述 BSC根据保存的历史切换信息对终端邻区的优先级进行排序 包括： 所述 BSC从历史切换信息中查找到与当前激活集相似的历史切换记录 集， 根据所述历史切换记录集分别统计切换加小区的次数， 历史切换次数越 多的切换加小区的优先级越高。
具体地， BSC基于一定的条件判断称两次切换的激活集是否相似， 如果 两次切换的激活集 [ASn, Pn]、 [AS2i, P2i] 0<i<=6满足以下条件:
(1 )两次切换的激活集包含的小区完全一样， 即 ASn = AS2i ( 0<i<=6 )
(2) 两次切换激活集中相同小区的导频强度差值 PH - P2I < d (d 为 设定值）， 含义是两次切换中该小区的强度一定程度上相近。 则判定两个激活集相似。
4叚设本次切换的激活集小区为 {AS^ AS2...... AS;}, 其中这些小区的邻区 分别为 nbu (j 为该小区配置的邻区数目） ：
AS 置的邻区列表 ={nbu、 nbn nbij}
AS2配置的邻区列表 ={nb21、 nbn nbij}
AS 置的邻区列表 ={nbu、 nbi2 nbij}
殳设 NB为上述列表的并集： NB^nb^ nb2 nbk }
该 BSC从数据中心查询匹配到和当前激活集相似的历史切换记录集，计 算 nbk做为切换加的小区的次数，统计为 Pk, 意义是处于该场景下的终端根据 数据判断其往该邻区移动的概率， 其值越大则该邻区被赋予的权重越大； 该 步骤是根据现网的统计数据来辅助优化手机邻区列表。
其中， 所述 BSC根据保存的小区的邻区信息对终端邻区的优先级进行排 序还包括： 所述 BSC获得当前切换后的激活集中小区的邻区列表信息， 统计 所述激活集中小区的共同邻区出现的次数， 次数越多的所述共同邻区的优先 级越高。
具体地， 对新的激活集里的每个小区分别获取邻区列表配置， 并取邻区 并集 NB = {[nb^Cj , [nb2, C2] [nbk, Ck] } , 其中， nbi为激活集中小区 的共同邻区， Ck为 nbk出现的次数，例如假设 AS^oAS2均配置了！^为邻区， 那么 d=2表示激活集中小区的共同邻区 nbi出现的次数为 2次；
邻区集合 N中的邻区 nbk按照以下条件赋予权重： 对于 Ck越大的邻区权重越大， 其含义是该邻区做为激活集小区的共同邻
区， AT往该小区切换的机率也更大。
上述 BSC按优先级由高到低的顺序截取前 31个作为本次发送给终端的 邻区列表； 所述 BSC向终端发送所述邻区列表。 通过该方法可以给终端提供 更合理的邻区列表， 提高切换成功率， 减少掉话。
如图 2所示， 为本发明 BSC实施例的结构示意图， 该 BSC包括排序模 块 21和生成模块 22, 其中：
排序模块， 设置为根据保存的终端的历史切换信息或小区的邻区信息对 终端邻区的优先级进行排序；
生成模块， 设置为按优先级由高到低的顺序对所述终端邻区进行取舍后 生成所述终端邻区列表。
其中， 所述排序模块， 是设置为： 从历史切换信息中查找到与当前激活 集相似的历史切换记录集， 根据所述历史切换记录集分别统计切换加小区的 次数， 历史切换次数越多的切换加小区的优先级越高； 或者， 获得当前切换 后的激活集中小区的邻区列表信息， 统计所述激活集中小区的共同邻区出现 的次数， 次数越多的所述共同邻区的优先级越高。
另外， 所述生成模块是设置为以如下方式从历史切换信息中查找到与当 前激活集相似的历史激活集： 从历史切换信息中的激活集中查找到与当前激 活集包含相同小区的历史切换记录集， 从包含相同小区的历史切换记录集中 查找到与当前激活集中对应小区的导频强度差值在预定阔值内的历史切换记 录集。
较佳的，所述 BSC还包括：保存模块 23 ,设置为保存所述历史切换信息。 该 BSC可以给终端提供更合理的邻区列表，提高切换成功率，减少掉话， 具体实现过程可参见图 1 , 此处不再赘述。
本领域普通技术人员可以理解上述方法中的全部或部分步骤可通过程序 来指令相关硬件完成， 上述程序可以存储于计算机可读存储介质中， 如只读 存储器、 磁盘或光盘等。 可选地， 上述实施例的全部或部分步骤也可以使用 一个或多个集成电路来实现。 相应地， 上述实施例中的各模块 /单元可以釆用 硬件的形式实现， 也可以釆用软件功能模块的形式实现。 本发明不限制于任
何特定形式的硬件和软件的结合。
以上实施例仅用以说明本发明的技术方案而非限制， 仅仅参照较佳实施 例对本发明进行了详细说明。 本领域的普通技术人员应当理解， 可以对本发 明的技术方案进行修改或者等同替换， 而不脱离本发明技术方案的精神和范 围， 均应涵盖在本发明的权利要求范围当中。
工业实用性
上述终端邻区列表的处理方法和基站控制器， 可以为终端提供更合理的 邻区列表信息， 从而提高了切换成功率， 减少系统掉话。
Claims
1、 一种终端邻区列表的处理方法， 该方法包括：
基站控制器 （BSC )根据保存的终端的历史切换信息或小区的邻区信息 对终端邻区的优先级进行排序；
所述 BSC按优先级由高到低的顺序对所述终端邻区进行取舍后生成所述 终端邻区列表。
2、 根据权利要求 1所述的方法， 其中：
所述 BSC根据保存的历史切换信息对终端邻区的优先级进行排序的步骤 包括：
所述 BSC 从历史切换信息中查找到与当前激活集相似的历史切换记录 集， 根据所述历史切换记录集分别统计切换加小区的次数， 历史切换次数越 多的切换加小区的优先级越高。
3、 根据权利要求 2所述的方法， 其中：
所述 BSC从历史切换信息中查找到与当前激活集相似的历史切换记录集 的步骤包括：
所述 BSC从历史切换信息中的激活集中查找到与当前激活集包含相同 d、 区的历史切换记录集， 从包含相同小区的历史切换记录集中查找到与当前激 活集中对应小区的导频强度差值在预定阔值内的历史切换记录集。
4、 根据权利要求 1-3任一权利要求所述的方法， 其中：
所述 BSC根据保存的历史切换信息对终端邻区的优先级进行排序的步骤 之前， 所述方法还包括：
所述 BSC记录并保存所述历史切换信息。
5、 根据权利要求 1所述的方法， 其中：
所述 BSC根据保存的小区的邻区信息对终端邻区的优先级进行排序的步 骤包括：
所述 B SC获得当前切换后的激活集中小区的邻区列表信息， 统计所述激 活集中小区的共同邻区出现的次数，次数越多的所述共同邻区的优先级越高。
6、 一种基站控制器（BSC ) , 该 BSC包括：
排序模块， 其设置为： 根据保存的终端的历史切换信息或小区的邻区信 息对终端邻区的优先级进行排序； 以及
生成模块， 其设置为： 按优先级由高到低的顺序对所述终端邻区进行取 舍后生成所述终端邻区列表。
7、 根据权利要求 6所述的 BSC, 其中：
所述排序模块是设置为： 从历史切换信息中查找到与当前激活集相似的 历史切换记录集， 根据所述历史切换记录集分别统计切换加小区的次数， 历 史切换次数越多的切换加小区的优先级越高。
8、 根据权利要求 7所述的 BSC, 其中：
所述排序模块是设置为以如下方式从历史切换信息中查找到与当前激活 集相似的历史切换记录集： 从历史切换信息中的激活集中查找到与当前激活 集包含相同小区的历史切换记录集， 从包含相同小区的历史切换记录集中查 找到与当前激活集中对应小区的导频强度差值在预定阔值内的历史切换记录
9、 根据权利要求 6-8任一权利要求所述的 BSC, 所述 BSC还包括： 保存模块， 其设置为保存所述历史切换信息。
10、 根据权利要求 6所述的 BSC, 其中：
所述排序模块是设置为： 获得当前切换后的激活集中小区的邻区列表信 息， 统计所述激活集中小区的共同邻区出现的次数， 次数越多的所述共同邻 区的优先级越高。
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