WO2010124501A1 - 一种优化网络覆盖和容量的方法及系统 - Google Patents

一种优化网络覆盖和容量的方法及系统 Download PDF

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Publication number
WO2010124501A1
WO2010124501A1 PCT/CN2009/075856 CN2009075856W WO2010124501A1 WO 2010124501 A1 WO2010124501 A1 WO 2010124501A1 CN 2009075856 W CN2009075856 W CN 2009075856W WO 2010124501 A1 WO2010124501 A1 WO 2010124501A1
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Prior art keywords
coverage
capacity
base station
cell
optimization
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PCT/CN2009/075856
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English (en)
French (fr)
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高音
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中兴通讯股份有限公司
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Application filed by 中兴通讯股份有限公司 filed Critical 中兴通讯股份有限公司
Priority to JP2012507574A priority Critical patent/JP5395952B2/ja
Priority to US13/266,167 priority patent/US8644141B2/en
Priority to EP09843912.8A priority patent/EP2426978B1/en
Publication of WO2010124501A1 publication Critical patent/WO2010124501A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/02—Arrangements for optimising operational condition
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/08—Testing, supervising or monitoring using real traffic
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W84/00—Network topologies
    • H04W84/18—Self-organising networks, e.g. ad-hoc networks or sensor networks

Definitions

  • the present invention relates to mobile communication systems, and more particularly to a method and system for optimizing network coverage and capacity. Background technique
  • the Long Term Evolution (LTE) system consists of an evolved Evolved UMTS Terrestrial Radio Access Network (E-UTRAN) and an EPC (Ethernet Packet Access) network, among which E-UTRAN A set of evolved Node Bs (eNBs, Evolved NodeBs) connected to the EPC through the SI interface, the eNBs can be connected through X2, and the S1 and X2 interfaces are logical interfaces.
  • One EPC can manage one or more eNBs, and one eNB can also be controlled by multiple EPCs, and one eNB can manage one or more cells.
  • the evolved LTE (LTE-A, LTE-Advanced) system evolved from the LTE system.
  • the network architecture is similar to that of LTE. Some applications such as relay, spectrum aggregation, and multi-point transmission are used in LTE-A. (CoMP, Coordinated Multipoint transmission reception) technology to enhance system performance.
  • network coverage is the use of planning tools to plan the base station layout and cell configuration in the initial stage of network planning.
  • the network coverage and capacity are optimized.
  • the system state parameters are still obtained manually through the network optimization tool.
  • the system status parameters are analyzed to determine the problems existing in the system, and then the problems existing in the system are improved through manual adjustment.
  • the manual optimization method causes a huge waste of human and material resources, high network maintenance cost, and manual configuration is prone to mismatch and missed allocation. Summary of the invention
  • the main object of the present invention is to provide a method and system for optimizing network coverage and capacity, solving the problem of artificially optimizing cost and error, and realizing self-optimization of network coverage and capacity.
  • the present invention provides a method for optimizing network coverage and capacity, the method comprising: determining, by a base station, whether there is a coverage and capacity problem according to a set threshold parameter for the collected coverage and capacity optimization data, where there is a coverage and capacity problem, the base station
  • the solution strategy is determined based on the existing coverage and capacity issues, as well as the coverage and capacity optimization data that caused the problem.
  • the determining, by the base station, the coverage and the capacity problem according to the set threshold parameter for the collected coverage and capacity optimization data specifically: setting a threshold of the cell signal quality at the base station, a threshold of the number of handover failures of the cell, and the base station If the signal quality in the coverage and capacity optimization data of the collected cell is lower than the set threshold, and the number of handover failures of the cell exceeds the set threshold, the coverage of the cell is considered to be missing;
  • the neighboring area of the cell is determined according to the cell deletion information of the neighboring base station. If it is deleted, it is considered that the coverage of the cell is missing.
  • the determining the solution strategy is specifically: the base station learns that the cell lacks coverage due to poor radio signal quality, and increases the pilot power of the cell and changes the antenna tilt angle;
  • the base station learns that the pilot power of the cell is increased due to the missing coverage of the cell due to the deletion of the neighboring cell. And change the antenna tilt.
  • the method further includes:
  • the base station sends coverage and capacity optimization to the network management node when the base station fails to determine the resolution policy, or is unable to know whether the determined resolution policy can be executed, or the determined resolution policy needs to adjust parameters of other peer base stations. Decision request;
  • the network management node performs an optimization decision according to the optimization decision request, and sends an overlay and capacity optimization command to the relevant base station.
  • the method further includes:
  • the optimized data that causes the coverage and capacity problem is also sent to the network management node;
  • the network management node sends a coverage and capacity optimization command to the base station according to the received optimization data and the local configuration data to determine a coverage and capacity problem.
  • the method further includes:
  • the base station When the base station is unable to know whether the determined resolution policy can be executed, requesting, by the coverage and capacity optimization decision request, the network management node to determine the enforceability of the solution policy; the network management node will solve the solution
  • the policy is compared with the cell constraint relationship set by itself. If the solution policy can be executed, the coverage and capacity optimization command is sent to the base station to notify the base station that the policy is executable.
  • the method further includes:
  • the base station When the solution strategy determined by the base station needs to adjust parameters of other peer base stations, the base station requests the network management node to perform parameter adjustment on the peer base station by using a coverage and capacity optimization decision request;
  • the network management node checks whether the peer base station can perform parameter adjustment according to the coverage and capacity optimization decision request, and if yes, sends an overlay and capacity optimization command to the peer base station.
  • a system for optimizing network coverage and capacity provided by the present invention includes: a base station, the base station includes: an overlay and capacity detection module, and an overlay and capacity management module; wherein:
  • the coverage and capacity detection module is configured to collect coverage and capacity optimization data, and determine whether there is coverage and capacity problem according to the threshold parameter set for the collected coverage and capacity optimization data; if there is coverage and capacity problem, there will be Coverage and capacity issues are notified to the coverage and capacity management module, and coverage and capacity optimization data that causes coverage and capacity issues are sent to the overlay and capacity management module;
  • the coverage and capacity management module is configured to determine a resolution policy based on existing coverage and capacity issues and coverage and capacity optimization data that cause the problem.
  • the system further includes a network management node, configured to perform an optimization decision, and send an overlay and capacity optimization command to the relevant base station;
  • the coverage and capacity management module is further configured to: when the solution policy is not determined, or whether the determined solution policy cannot be obtained, or the determined solution policy needs to adjust parameters of other peer base stations,
  • the network management node sends an overlay and capacity optimization decision request.
  • the coverage and capacity management module is further configured to: when the failure to determine the solution decision, send optimization data that causes coverage and capacity problems to the network management node;
  • the network management node is further configured to: according to the received optimization data and local configuration data that cause coverage and capacity problems, determine a resolution policy, and send an overlay and capacity optimization command to the coverage and capacity management module.
  • the coverage and capacity management module is further configured to: when the inability to learn whether the determined resolution policy is executable, request, by the coverage and capacity optimization decision request, the network management node to determine the solution policy. Executability
  • the network management node is further configured to compare the solution policy with a cell constraint relationship set by itself, and if the solution policy can be performed, send coverage and capacity optimization to the coverage and capacity management module.
  • the command informs it that the resolution policy is executable.
  • the coverage and capacity management module is further configured to: when the determined solution policy needs to adjust parameters of other peer base stations, request, by the coverage and capacity optimization decision request, the network management node to The peer base station performs parameter adjustment;
  • the network management node is further configured to: according to the coverage and capacity optimization decision request, locally check whether the peer base station can perform parameter adjustment, and if yes, send coverage and capacity to the peer base station. Optimize the command.
  • the present invention completes the optimization process through the base station, realizes automatic optimization of network coverage and capacity, saves a lot of manpower and material resources required by the traditional optimization method, reduces network operation and maintenance costs, and at the same time, in the dynamic change of the network, It effectively compensates for parameter mismatch and mismatch in network planning, effectively compensates and optimizes network coverage and capacity, improves network performance, reduces service drop rate, and improves user satisfaction overall.
  • FIG. 1 is a schematic flow chart of a method for optimizing network coverage and capacity according to the present invention
  • the base station collects coverage and capacity optimization data, and determines whether there is coverage and capacity problem according to threshold parameters set for the collected coverage and capacity optimization data set on the base station; when there is coverage and capacity problem The base station determines the resolution strategy based on the existing coverage and capacity issues and the coverage and capacity optimization data that caused the problem.
  • Step 101 A base station collects coverage and capacity optimization data;
  • the coverage and capacity optimization data includes: a cell signal quality measured by the terminal included in the terminal measurement report, including a cell of the base station and a cell of another base station; coverage and capacity between the base stations The inter-cell uplink and downlink interference indication and the cell addition and deletion information of the neighboring base station included in the quantity correlation measurement report; the information about the coverage and capacity of the base station, such as: the handover performance counter information of the cell of the base station, including the number of handovers of the cell, and the handover The number of failures and the reason for the failure of the handover; and the cell drop counter information of the base station, such as the number of dropped calls of the cell service and the cause of the dropped call.
  • Step 102 The base station determines, according to the set threshold parameter for the collected coverage and capacity optimization data, whether there is a coverage and capacity problem;
  • the threshold parameter for the collected coverage and capacity optimization data is set on the base station, and the base station compares the collected coverage and capacity optimization data with corresponding threshold parameters to determine whether there is coverage and capacity problem;
  • the threshold of the cell signal quality is set on the base station and the threshold of the number of handover failures of the cell is exceeded, the signal quality in the coverage and capacity optimization data of the cell A collected by the base station is lower than the set threshold, and the number of handover failures of the cell A exceeds the set. At the threshold, it is considered that there is a problem of the coverage of the cell A.
  • the neighboring area of the neighboring base station is determined to be deleted according to the cell deletion information of the neighboring base station. The coverage of the cell is missing.
  • Step 103 The base station determines a solution strategy according to the existing coverage and capacity problem and the coverage and capacity optimization data causing the problem;
  • the cell coverage is more complete by increasing the pilot power of the cell A and changing the antenna tilt angle.
  • the base station learns that the coverage of the cell B is lost due to the deletion of the neighboring cell, and the coverage of the cell B is more complete by increasing the pilot power of the cell B and changing the antenna tilt.
  • Step 104 If the base station cannot know whether the solution policy can be executed, fails to determine the solution policy, or needs to adjust parameters of other peer base stations, the base station sends an overlay and capacity optimization decision request to the network management node, and causes coverage and capacity problems.
  • the optimized data is sent to the network management node; For example, the parameter adjustment of the local cell is restricted, and the solution policy cannot be executed.
  • the base station reports to the network management node.
  • the base station sends the network to the network.
  • the management node reports.
  • Step 105 The network management node optimizes the decision request according to the coverage and capacity reported by the base station, the coverage and capacity optimization data of the coverage and capacity problem, and the local configuration data, performs an optimization decision according to the optimization algorithm, and sends coverage and capacity optimization to the relevant base station.
  • the local configuration data of the network management node includes: basic information of the managed base station, a neighbor relationship, cell information, and the like.
  • the basic information includes a base station identifier and a geographic location; the cell information includes a cell identifier, a coverage, and a neighbor cell list.
  • the network management node may also set some cell constraint relationships as the decision conditions for coverage and capacity optimization, for example, the coverage black table, including areas that do not need coverage optimization, such as geographic longitude and latitude.
  • the optimization algorithm can be various, including:
  • the network management node performs a parameter adjustment request on the base station (also referred to as a problem base station) that sends the coverage and capacity optimization decision request in the coverage and capacity optimization decision request, and locally checks that the peer base station can perform parameter adjustment.
  • the peer base station sends an overlay and capacity optimization command;
  • the network management node compares the solution policy with the cell constraint relationship set by the network management node according to the request for determining the enforceability of the solution policy according to the coverage and capacity optimization decision request, and if it can be adjusted, sends the coverage and capacity to the problem base station. Optimize the command notification problem base station resolution policy executable;
  • the network management node will decide the solution strategy based on the received optimization data that causes coverage and capacity problems and its local configuration data.
  • Sending the coverage and capacity optimization command to the problem base station for example, according to the number of cell handovers reported by the problem base station, the number of handover failures, the reason for the handover failure, and the local configuration data, it is determined that the cell A in the problematic base station is due to the cell B of the base station 2 If the neighboring area causes the handover failure rate to be high, the problem base station is notified that the cell B of the base station 2 is configured as the neighboring cell of the cell A, and the coverage optimization adjustment is performed.
  • Step 106 The base station that receives the coverage and capacity optimization command executes an optimization command.
  • the base station that receives the coverage and capacity optimization commands performs optimization commands such as changing the neighbor configuration relationship table, adjusting the cell transmit power and adjusting the antenna tilt and adjusting the coverage and capacity related hysteresis parameters.
  • the network management node can notify the base station of the changed information by using the overlay and optimization command, and the network management node command has the highest priority.
  • a coverage and capacity optimization processing function module 211 is provided in the base station 21, and the module includes: an overlay and capacity detection module 212.
  • the coverage and capacity management module 213 is configured to determine a solution strategy according to the existing coverage and capacity problem and the coverage and capacity optimization data that causes the problem; if it is not known whether the solution strategy can be executed, the solution strategy cannot be determined, or other pairs need to be adjusted If the parameters of the base station are sent, the coverage and capacity optimization decision request is sent to the network management node 22, and the optimization data causing the coverage and capacity problem is sent to the network management node 22; and is also used to receive the coverage and capacity optimization commands. Then execute the optimization command.
  • the network management node 22 is configured to perform the coverage and capacity optimization decision request reported by the coverage and capacity management module 213, the coverage and capacity optimization data that causes the coverage and capacity problem, and the local configuration data, perform an optimization decision according to the optimization algorithm, and send the optimization decision to the relevant base station.
  • Optimization algorithms can be multiple, including:
  • the network management node 22 performs a parameter adjustment request to the peer base station of the base station 21 according to the coverage and capacity optimization decision request, and locally checks that the peer base station can perform parameter adjustment and then sends an overlay and capacity optimization command to the peer base station;
  • the network management node 22 compares the solution policy with the cell constraint relationship set by the network management node according to the request for determining the enforceability of the solution policy in the coverage and capacity optimization decision request, and if it can be adjusted, the coverage to the base station 21 is
  • the capacity management module 213 sends an overlay and capacity optimization command to notify the base station 21 that the policy is executable;
  • the network management node 22 will determine the resolution policy according to the received optimization data causing the coverage and capacity problem and its local configuration data, and send the coverage and coverage to the coverage and capacity management module 213 of the base station 21.
  • the capacity optimization command for example, according to the number of cell handovers reported by the coverage and capacity management module 213 of the base station 21, the number of handover failures, the reason for the handover failure, and the local configuration data, determines that the cell A in the base station 21 is a cell that misses the base station X. If B is a neighboring cell and the handover failure rate is high, the base station 21 is notified to configure the cell B of the base station X as the neighboring cell of the cell A, and the coverage optimization adjustment is performed.
  • the network management node is the base station upper layer network management operation background.

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Description

一种优化网络覆盖和容量的方法及系统 技术领域
本发明涉及移动通信系统， 尤其涉及一种优化网路覆盖和容量的方法 及系统。 背景技术
长期演进（ LTE, Long Term Evolution ) 系统由演进的通用移动通信陆 地无线接入网络 （E-UTRAN , Evolved UMTS Terrestrial Radio Access Network )和演进分组核心 （EPC, Packet Core ) 网组成， 其中 E-UTRAN 包含和 EPC通过 SI接口连接的演进型节点 B ( eNB, Evolved NodeB ) 的 集合， eNB之间能通过 X2连接， S1和 X2接口为逻辑接口。 一个 EPC可 以管理一个或多个 eNB,—个 eNB也可以受控于多个 EPC,—个 eNB可以 管理一个或多个小区。 演进型 LTE ( LTE-A, LTE- Advanced ) 系统由 LTE 系统演进而来， 网络架构与 LTE —致， 在 LTE-A 中釆用了一些如中继 ( relay ) 、 频谱聚合和多点传输接收 （CoMP , Coordinated Multipoint transmission reception )技术来增强系统性能。
建立和运营一个网络需要完成很多工作， 比如， 规划、 配置、 优化、 计算、 调整、 测试、 预防错误、 减少失败和自我恢复等， 一方面运营商想 要减少运营成本和维护成本， 另一方面用户需要减化使用流程， 比如家庭 基站（Home NodeB )设备， 用户希望作为一个即插即用设备买回家即可使 用， 一上电能够自动进行配置。 尤其是对于 LTE系统， 其发展趋势必然是 自配置、 自优化和自适应， 将人为因素对网络的影响降到最低。
在网络运行中， 运营商希望能够提供连续的优化的上下行匹配的网络 覆盖， 优化的上下行系统容量， 覆盖和容量平衡最优化， 同时减少网络干 扰以提高小区边缘性能。 目前， 网络覆盖是在网络规划初期人工地利用规 划工具对基站布点和小区配置进行规划 , 在网络运行过程中对网络覆盖和 容量的优化， 仍然是由人工通过网络优化工具获取系统状态参数， 对系统 状态参数进行分析， 判断出系统存在的问题， 再通过人工调整改善系统存 在的问题。 人工优化方式造成了人力物力的巨大浪费， 网络维护成本高， 且人工配置很容易出现错配和漏配的问题。 发明内容
有鉴于此， 本发明的主要目的是提供一种优化网络覆盖和容量的方法 及系统， 解决人为优化成本高容易出错的问题， 实现网络覆盖和容量的自 优化。
本发明提供的一种优化网络覆盖和容量的方法， 该方法包括： 基站根据设置的对于收集的覆盖和容量优化数据的门限参数， 确定是 否存在覆盖和容量问题， 存在覆盖和容量问题时， 基站根据存在的覆盖和 容量问题、 以及引起该问题的覆盖和容量优化数据确定解决策略。
上述方案中， 所述基站根据设置的对于收集的覆盖和容量优化数据的 门限参数， 确定是否存在覆盖和容量问题具体为： 在基站上设置小区信号 质量的门限， 小区的切换失败次数门限， 基站收集的小区的覆盖和容量优 化数据中信号质量低于设置的门限， 且小区的切换失败次数超过设置的门 限时， 则认为该小区的覆盖存在缺失问题；
和 /或， 在基站上设置业务掉话次数门限， 基站收集的小区的覆盖和容 量优化数据中业务掉话次数超过设置的门限时， 根据相邻基站的小区删除 信息判断该小区的邻区已被删除， 则认为该小区的覆盖出现缺失问题。
上述方案中， 所述确定解决策略具体为： 基站获知小区由于无线信号 质量差导致覆盖缺失， 则增大小区的导频功率和改变天线倾角；
基站获知由于邻区删除导致小区的覆盖缺失， 则增大小区的导频功率 和改变天线倾角。
上述方案中， 该方法进一步包括：
所述基站未能确定出解决策略、 或无法获知所确定的解决策略能否执 行、 或所确定的解决策略需要调整其它对等基站的参数时， 所述基站向网 络管理节点发送覆盖和容量优化判决请求；
所述网络管理节点根据优化判决请求进行优化判决， 向相关基站发送 覆盖和容量优化命令。
上述方案中， 该方法进一步包括：
所述基站未能确定出解决策略时， 还将引起覆盖和容量问题的优化数 据发送给网络管理节点；
所述网络管理节点根据接收到的引起覆盖和容量问题的优化数据和本 地配置数据决策出解决策略， 向所述基站发送覆盖和容量优化命令。
上述方案中， 该方法进一步包括：
所述基站无法获知所确定的解决策略能否执行时， 通过所述覆盖和容 量优化判决请求向所述网络管理节点请求判决所述解决策略的可执行性； 所述网络管理节点将所述解决策略与自身设置的小区约束关系进行比 较， 若所述解决策略能够执行， 则向所述基站发送覆盖和容量优化命令通 知该基站解决策略可执行。
上述方案中， 该方法进一步包括：
所述基站所确定的解决策略需要调整其它对等基站的参数时， 所述基 站通过覆盖和容量优化判决请求向所述网络管理节点请求对所述对等基站 进行参数调整；
所述网络管理节点根据覆盖和容量优化判决请求， 在本地检查所述对 等基站是否能够进行参数调整， 若能够调整， 则向所述对等基站发送覆盖 和容量优化命令。 本发明提供的一种优化网络覆盖和容量的系统， 包括： 基站， 所述基 站包括： 覆盖和容量检测模块以及覆盖和容量管理模块； 其中：
所述覆盖和容量检测模块， 用于收集覆盖和容量优化数据， 根据设置 的对于收集的覆盖和容量优化数据的门限参数， 确定是否存在覆盖和容量 问题； 存在覆盖和容量问题时， 将存在的覆盖和容量问题通知所述覆盖和 容量管理模块， 并将引起覆盖和容量问题的覆盖和容量优化数据发送给覆 盖和容量管理模块；
所述覆盖和容量管理模块， 用于根据存在的覆盖和容量问题以及引起 该问题的覆盖和容量优化数据确定解决策略。
上述方案中， 该系统还包括网络管理节点， 用于进行优化判决， 向相 关基站发送覆盖和容量优化命令；
所述覆盖和容量管理模块， 还用于在未能确定出解决策略、 或无法获 知所确定的解决策略能否执行、 或所确定的解决策略需要调整其它对等基 站的参数时， 向所述网络管理节点发送覆盖和容量优化判决请求。
上述方案中， 所述覆盖和容量管理模块， 还用于在未能确定出解决策 略时， 将引起覆盖和容量问题的优化数据发送给所述网络管理节点；
上述方案中， 所述网络管理节点， 还用于根据接收到的引起覆盖和容 量问题的优化数据和本地配置数据决策出解决策略， 向所述覆盖和容量管 理模块发送覆盖和容量优化命令。
上述方案中， 所述覆盖和容量管理模块， 还用于在无法获知所确定的 解决策略能否执行时， 通过所述覆盖和容量优化判决请求向所述网络管理 节点请求判决所述解决策略的可执行性；
上述方案中， 所述网络管理节点， 还用于将所述解决策略与自身设置 的小区约束关系进行比较， 若所述解决策略能够执行， 则向所述覆盖和容 量管理模块发送覆盖和容量优化命令通知其解决策略可执行。 上述方案中， 所述覆盖和容量管理模块， 还用于在所确定的解决策略 需要调整其它对等基站的参数时， 通过所述覆盖和容量优化判决请求向所 述网络管理节点请求对所述对等基站进行参数调整；
上述方案中， 所述网络管理节点， 还用于根据覆盖和容量优化判决请 求， 在本地检查所述对等基站是否能够进行参数调整， 若能够调整， 则向 所述对等基站发送覆盖和容量优化命令。
综上所述， 本发明通过基站完成优化过程， 实现了网络覆盖和容量的 自动优化， 节省了传统优化方法所需要的大量人力物力， 降低了网络运维 成本， 同时在网络动态变化中， 能有效弥补网络规划中的参数漏配、 错配 现象， 对网络覆盖和容量进行有效地补偿和优化， 提高了网络性能， 减少 了业务掉话率， 总体上提高了用户满意度。 附图说明
图 1是本发明优化网络覆盖和容量的方法的流程示意图；
图 2是本发明优化网络覆盖和容量的系统的架构示意图。 具体实施方式 本发明的基本思想是： 基站收集覆盖和容量优化数据， 根据基站上设 置的对于收集的覆盖和容量优化数据的门限参数， 确定是否存在覆盖和容 量问题； 在存在覆盖和容量问题时， 基站根据存在的覆盖和容量问题以及 引起该问题的覆盖和容量优化数据确定解决策略。
下面结合附图对本发明的具体实施方式进行说明。
图 1所示为本发明优化网络覆盖和容量的方法， 包括如下步骤： 步骤 101 : 基站收集覆盖和容量优化数据；
所述覆盖和容量优化数据包括： 终端测量报告中包含的终端测量到的 小区信号质量， 包括本基站的小区和其它基站的小区； 基站间的覆盖和容 量相关测量报告中包含的小区间上下行干扰指示和相邻基站的小区增加和 删除信息； 基站覆盖和容量的相关信息， 如： 基站的小区的切换性能计数 器信息， 包含小区的切换次数、 切换失败次数和切换失败原因等； 以及基 站的小区掉话计数器信息， 如小区业务掉话次数和业务掉话原因等。
步骤 102: 基站根据设置的对于收集的覆盖和容量优化数据的门限参 数， 确定是否存在覆盖和容量问题；
具体的， 在基站上设置对于收集的覆盖和容量优化数据的门限参数， 基站将收集的覆盖和容量优化数据与相应的门限参数进行比较， 确定是否 存在覆盖和容量问题；
例如， 在基站上设置小区信号质量的门限， 小区的切换失败次数门限， 则基站收集的小区 A的覆盖和容量优化数据中信号质量低于设置的门限， 且小区 A的切换失败次数超过设置的门限时， 则认为小区 A的覆盖存在缺 失问题。
又如， 在基站上设置业务掉话次数门限， 则基站收集的小区 B的业务 掉话次数超过设置的门限时， 根据相邻基站的小区删除信息判断小区 B的 邻区已被删除， 则认为该小区的覆盖出现缺失问题。
步骤 103:基站根据存在的覆盖和容量问题以及引起该问题的覆盖和容 量优化数据确定解决策略；
例如， 基站获知小区 A由于无线信号质量差导致覆盖缺失， 则通过增 大小区 A的导频功率和改变天线倾角等方式， 使小区的覆盖更为完整。
又如， 基站获知由于邻区删除导致小区 B的覆盖缺失， 则通过增大小 区 B的导频功率和改变天线倾角， 使得小区 B的覆盖更为完整。
步骤 104: 若基站无法获知解决策略能否执行、 未能确定出解决策略或 需要调整其它对等基站的参数， 则基站向网络管理节点发送覆盖和容量优 化判决请求， 并将引起覆盖和容量问题的优化数据发送给网络管理节点； 例如， 本地小区的参数调整被限制， 导致解决策略无法执行， 需要其 它对等基站进行参数调整时， 基站向网络管理节点上报。
又如， 由于运营商在进行网络覆盖规划时进行了一些约束关系的限制， 对于某些偏远地区允许覆盖不连续的情况存在， 因而对于某些地区无法获 知是否需要进行覆盖补偿时， 基站向网络管理节点上报。
步骤 105: 网络管理节点根据其下基站上报的覆盖和容量优化判决请 求、 引起覆盖和容量问题的覆盖和容量优化数据以及本地配置数据， 按照 优化算法进行优化判决， 向相关基站发送覆盖和容量优化命令；
所述网络管理节点的本地配置数据包括： 所管理的基站的基本信息、 相邻关系、 小区信息等。 其中， 所述基本信息包括基站标志符和地理位置； 所述小区信息包括小区标志符、 覆盖范围和邻接小区列表。
所述网络管理节点中还可以设置一些小区约束关系， 作为覆盖和容量 优化的判决条件， 比如， 覆盖黑表， 包括不需要覆盖优化的地区， 比如可 用地理经度和纬度来表示。
所述优化算法可以是多种， 包括：
网络管理节点根据覆盖和容量优化判决请求中对发送覆盖和容量优化 判决请求的基站 （亦称为问题基站） 的对等基站进行参数调整的请求， 在 本地检查对等基站能够进行参数调整后向对等基站发送覆盖和容量优化命 令；
网络管理节点根据覆盖和容量优化判决请求中对解决策略的可执行性 进行判决的请求， 将解决策略与网络管理节点自身设置的小区约束关系进 行比较， 若可以调整则向问题基站发送覆盖和容量优化命令通知问题基站 解决策略可执行； 以及
对于问题基站未能确定出解决策略的情况， 网络管理节点将根据接收 到的引起覆盖和容量问题的优化数据和其本地配置数据决策出解决策略， 向问题基站发送覆盖和容量优化命令， 比如， 根据问题基站上报的小区切 换次数、 切换失败次数和切换失败原因以及本地配置数据， 判断出问题基 站中的小区 A是由于漏配基站 2的小区 B为邻区导致切换失败率高， 则通 知问题基站将基站 2的小区 B配置为其小区 A的邻接小区， 进行覆盖优化 调整。
步骤 106: 接收到覆盖和容量优化命令的基站执行优化命令；
接收到覆盖和容量优化命令的基站执行优化命令， 如更改邻区配置关 系表、 调整小区发射功率和调整天线倾角和调整覆盖和容量相关的迟滞参 数等操作。
当网络管理节点中与覆盖和容量优化相关的配置变更时， 比如邻区关 系表变更， 网络管理节点可通过覆盖和优化命令将变更后的信息通知给基 站， 网络管理节点命令具备最高优先级。
图 2所示为本发明优化网络覆盖和容量的系统， 包括： 基站 21和网络 管理节点 22, 其中， 基站 21中设置覆盖和容量优化处理功能模块 211 , 该 模块包括： 覆盖和容量检测模块 212和覆盖和容量管理模块 213 , 其中： 覆盖和容量检测模块 212, 用于收集覆盖和容量优化数据； 根据设置的 对于收集的覆盖和容量优化数据的门限参数， 确定是否存在覆盖和容量问 题； 存在覆盖和容量问题时， 将存在的覆盖和容量问题通知覆盖和容量管 理模块 213 ,并将引 ^隻盖和容量问题的覆盖和容量优化数据发送给覆盖和 容量管理模块 213。
覆盖和容量管理模块 213 ,用于根据存在的覆盖和容量问题以及引起该 问题的覆盖和容量优化数据确定解决策略； 若无法获知解决策略能否执行、 未能确定出解决策略或需要调整其它对等基站的参数， 则向 网络管理节点 22发送覆盖和容量优化判决请求， 并将引起覆盖和容量问题 的优化数据发送给网络管理节点 22; 还用于在接收到覆盖和容量优化命令 后执行优化命令。
网络管理节点 22, 用于根据覆盖和容量管理模块 213上报的覆盖和容 量优化判决请求、 引起覆盖和容量问题的覆盖和容量优化数据以及本地配 置数据， 按照优化算法进行优化判决， 向相关基站发送覆盖和容量优化命 令；
优化算法可以是多种， 包括：
网络管理节点 22根据覆盖和容量优化判决请求中对基站 21的对等基 站进行参数调整的请求， 在本地检查对等基站能够进行参数调整后向对等 基站发送覆盖和容量优化命令；
网络管理节点 22根据覆盖和容量优化判决请求中对解决策略的可执行 性进行判决的请求， 将解决策略与网络管理节点自身设置的小区约束关系 进行比较， 若可以调整则向基站 21的覆盖和容量管理模块 213发送覆盖和 容量优化命令通知基站 21解决策略可执行； 以及
对于未能确定出解决策略的情况， 网络管理节点 22将根据接收到的引 起覆盖和容量问题的优化数据和其本地配置数据决策出解决策略， 向 基站 21的覆盖和容量管理模块 213发送覆盖和容量优化命令， 比如， 根据 基站 21的覆盖和容量管理模块 213上报的小区切换次数、 切换失败次数和 切换失败原因以及本地配置数据，判断出基站 21中的小区 A是由于漏配基 站 X的小区 B为邻区导致切换失败率高， 则通知基站 21将基站 X的小区 B配置为其小区 A的邻接小区， 进行覆盖优化调整。
在 LTE和 LTE-A系统中网络管理节点为基站上层网络管理操作后台。 最后需要说明以上实施方式仅用于说明本发明， 而非用于限定本发明。 如果不脱离本发明的精神和范围的对本发明进行修改或者等同替换， 均应 涵盖在本发明的权利要求范围当中。

Claims

权利要求书
1、 一种优化网络覆盖和容量的方法， 其特征在于， 该方法包括： 基站根据设置的对于收集的覆盖和容量优化数据的门限参数， 确定是 否存在覆盖和容量问题， 存在覆盖和容量问题时， 基站根据存在的覆盖和 容量问题、 以及引起该问题的覆盖和容量优化数据确定解决策略。
2、 如权利要求 1所述的方法， 其特征在于， 所述基站根据设置的对于 收集的覆盖和容量优化数据的门限参数， 确定是否存在覆盖和容量问题具 体为： 在基站上设置小区信号质量的门限， 小区的切换失败次数门限， 基 站收集的小区的覆盖和容量优化数据中信号质量低于设置的门限， 且小区 的切换失败次数超过设置的门限时， 则认为该小区的覆盖存在缺失问题； 和 /或， 在基站上设置业务掉话次数门限， 基站收集的小区的覆盖和容 量优化数据中业务掉话次数超过设置的门限时， 根据相邻基站的小区删除 信息判断该小区的邻区已被删除， 则认为该小区的覆盖出现缺失问题。
3、如权利要求 2所述的方法，其特征在于， 所述确定解决策略具体为： 基站获知小区由于无线信号质量差导致覆盖缺失， 则增大小区的导频功率 和改变天线倾角；
基站获知由于邻区删除导致小区的覆盖缺失， 则增大小区的导频功率 和改变天线倾角。
4、 如权利要求 1所述的方法， 其特征在于， 该方法进一步包括： 所述基站未能确定出解决策略、 或无法获知所确定的解决策略能否执 行、 或所确定的解决策略需要调整其它对等基站的参数时， 所述基站向网 络管理节点发送覆盖和容量优化判决请求；
所述网络管理节点根据优化判决请求进行优化判决， 向相关基站发送 覆盖和容量优化命令。
5、 如权利要求 4所述的方法， 其特征在于， 该方法进一步包括： 所述基站未能确定出解决策略时， 还将引起覆盖和容量问题的优化数 据发送给网络管理节点；
所述网络管理节点根据接收到的引起覆盖和容量问题的优化数据和本 地配置数据决策出解决策略， 向所述基站发送覆盖和容量优化命令。
6、 如权利要求 4所述的方法， 其特征在于， 该方法进一步包括： 所述基站无法获知所确定的解决策略能否执行时， 通过所述覆盖和容 量优化判决请求向所述网络管理节点请求判决所述解决策略的可执行性； 所述网络管理节点将所述解决策略与自身设置的小区约束关系进行比 较， 若所述解决策略能够执行， 则向所述基站发送覆盖和容量优化命令通 知该基站解决策略可执行。
7、 如权利要求 4所述的方法， 其特征在于， 该方法进一步包括： 所述基站所确定的解决策略需要调整其它对等基站的参数时， 所述基 站通过覆盖和容量优化判决请求向所述网络管理节点请求对所述对等基站 进行参数调整；
所述网络管理节点根据覆盖和容量优化判决请求， 在本地检查所述对 等基站是否能够进行参数调整， 若能够调整， 则向所述对等基站发送覆盖 和容量优化命令。
8、 一种优化网络覆盖和容量的系统， 包括： 基站， 其特征在于， 所述 基站包括： 覆盖和容量检测模块以及覆盖和容量管理模块； 其中：
所述覆盖和容量检测模块， 用于收集覆盖和容量优化数据， 根据设置 的对于收集的覆盖和容量优化数据的门限参数， 确定是否存在覆盖和容量 问题； 存在覆盖和容量问题时， 将存在的覆盖和容量问题通知所述覆盖和 容量管理模块， 并将引起覆盖和容量问题的覆盖和容量优化数据发送给覆 盖和容量管理模块；
所述覆盖和容量管理模块， 用于根据存在的覆盖和容量问题以及引起 该问题的覆盖和容量优化数据确定解决策略。
9、 如权利要求 8所述的系统， 其特征在于， 该系统还包括网络管理节 点， 用于进行优化判决， 向相关基站发送覆盖和容量优化命令；
所述覆盖和容量管理模块， 还用于在未能确定出解决策略、 或无法获 知所确定的解决策略能否执行、 或所确定的解决策略需要调整其它对等基 站的参数时， 向所述网络管理节点发送覆盖和容量优化判决请求。
10、 如权利要求 9所述的系统， 其特征在于，
所述覆盖和容量管理模块， 还用于在未能确定出解决策略时， 将引起 覆盖和容量问题的优化数据发送给所述网络管理节点；
所述网络管理节点， 还用于根据接收到的引起覆盖和容量问题的优化 数据和本地配置数据决策出解决策略， 向所述覆盖和容量管理模块发送覆 盖和容量优化命令。
11、 如权利要求 9所述的系统， 其特征在于，
所述覆盖和容量管理模块， 还用于在无法获知所确定的解决策略能否 执行时， 通过所述覆盖和容量优化判决请求向所述网络管理节点请求判决 所述解决策略的可执行性；
所述网络管理节点， 还用于将所述解决策略与自身设置的小区约束关 系进行比较， 若所述解决策略能够执行， 则向所述覆盖和容量管理模块发 送覆盖和容量优化命令通知其解决策略可执行。
12、 如权利要求 9所述的系统， 其特征在于，
所述覆盖和容量管理模块， 还用于在所确定的解决策略需要调整其它 对等基站的参数时， 通过所述覆盖和容量优化判决请求向所述网络管理节 点请求对所述对等基站进行参数调整； 所述网络管理节点， 还用于根据覆 盖和容量优化判决请求， 在本地检查所述对等基站是否能够进行参数调整， 若能够调整， 则向所述对等基站发送覆盖和容量优化命令。
PCT/CN2009/075856 2009-04-27 2009-12-22 一种优化网络覆盖和容量的方法及系统 WO2010124501A1 (zh)

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EP2426978B1 (en) 2018-10-31
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