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1、上海交通大学硕士学位论文WCDMA系统基站布局规划算法研究姓名：林黄娜申请学位级别：硕士专业：通信与信息系统指导教师：蒋铃鸽20070108上海交通大学硕士学位论文 3义一种导频功率的计算方法， 在基于链路传播损耗的分配基础上深入分配。 根据小区负载动态调整导频功率大小， 通过 CIR 接入原则重新分配移动台，克服了传统策略过于简单、仿真结果保守的缺点，仿真结果表明该策略在保证服务质量的基础上减少了规划所需基站个数、 有效降低终端总发射功率的优点，且可行性强。 无线资源管理算法的合理应用与否将决定着 WCDMA 系统性能优越型能否体现，网络规划必须慎重考虑 RRM 参数的规划。作者主要就软切换
2、和功率控制算法的原理和应用进行了研究， 采用了二者结合的思想对性能进行了分析，利用 OPNET 仿真工具设计两种典型的软切换场景分别研究门限与概率的关系、上下行软切换的覆盖与容量增益。仿真结果表明软切换门限参数直接影响了软切换概率， 软切换有效地降低上行发射功率、增加链路吞吐量，二者结合的算法对克服系统的“远近效应” 、降低同频干扰和提高系统容量和覆盖有很好的效果。 最后，作者就目前热点的 HSDPA 技术作了研究和探讨，解析其技术特点后，从容量规划和覆盖规划的角度对其工程实施进行了分析。结果证明，合理地将 HSDPA 技术规划应用于 R99、R4 的 WCDMA 网络，有效地增大其下行吞吐量
3、，无需改变硬件设施和原基站布局。 关键词：自动基站布局 启发式算法 功率分配算法 移动台分配策略 RRM 参数规划 HSDPA 上海交通大学硕士学位论文 4RESEARCH ON CELL LOCATION PLANNING ALGORITHMS IN WCDMA SYSTEM ABSTRACT Network planning of WCDMA is a key task and great challenge for operators. Simulator used in the planning process is one of most impportant factors, si
4、nce its performance will determine whether planned results will satisfy operators requirements,including coverage, capacity, cost and Qos. Monte-Carlo simulator which widely used currently, based on a first educated guess of a reasonable configuration, takes network evaluation and then adjustment of
5、 parameters. The above described procedures will repeat until the required quality is achieved. Its obviously quite time-consuming and dependent too much on planners experience .Meanwhile, the cost in cell planning occupies almost 75 percent of that in whole network planning,besides it influencs net
6、work performance and future expansibility. The paper focuses on automatic cell planning model and algorithms, optimization with RRM and following up research. Firstly automatic cell planning model is proposed, where sophisticated 上海交通大学硕士学位论文 5heuristic algorithm is adopted to find out optimal solut
7、ions from candidate stations and relative configuration as NP-Hard problem. It works automatically to search in feasible set and approaches to best overall solution, which can conquer disadvantages in Monte-Carlo simulator. The author analysis mathematic algorithms in the model, including heuristic
8、algorithm, power assignment algorithm and mobile station distribution strategies in theory.Then a new pilot-power-controlled mobile station distribution scheme is proposed to overcome defects in traditional one,which is based on least pathloss.It defines a new manner of calculate pilot power and mak
9、es an automatic adjustment in according to cell load.Mobile stations are reassigned to appropriate BS based on CIR principle.The simulation results prove that with considering well about self-interference nature, the new scheme can reduce base station number and lower total transimssion power effect
10、ively with satisfying system requirements. Besides, network planning should pay attention on RRM parameters, in order to make good use of limited radio resource and realize excellent effort of WCDMA techniques.The author mainly study the principle and application of soft handover and power control a
11、lgorithms combinatively. Two scenes are designed in OPNET to validate relationship between 上海交通大学硕士学位论文 6threshold and SHO probability, coverage and capacity in uplink and downlink with SHO gain. The results demonstrate that they work well in avoiding “far and near effect”, reducing interference in
12、same frequency and highing up systematic coverage and capacity. Lastly, the author probes into the popular technique HSDPA and its network realization, in aspects of capacity planning and coverage planning. It demonstrates rational HSDPA planning based on WCDMA R99/R4 network can increase downlink t
13、hroughput largely in needless of change hardware equimpment or cell location. KEY WORDS: automatic cell planning, mobile station distribution scheme, heuristic algorithm, power assignment algorithm, RRM parameter, HSDPA 上海交通大学硕士学位论文 9缩略语表 符 号 说 明 3G 第三代移动通信 WCDMA（Wide Division Multiple Access） 宽带码分多
14、址 BLER（Bit Block Error Rate） 误块率 Eb/N0 信息能量与噪声比特比 CS(Circuit Switch) 电路交换 PS(Packet Switch) 分组交换 Qos（Quality of Service） 服务质量 UE(User Equipment) 用户终端 NodeB 基站节点 RNC(Radio Network Control) 网络控制中心 BS（Base Station） 基站 CS（Candidate Station） 候选基站 MS（Mobile Station） 移动台 SHO(Soft Handover) 软切换 AS_Th 门限 AS_Th_Hysteresis 滞后门限 AS_Rep_Hysteresis 换位门限 HSDPA（High Speed Downlink Packet Access） 高速下行分组接入 MAX C/I（Maximum Carrier to Interference） 最大载干比算法 RR（Round Robin） 轮循算法 PF（Proportional Fair） 正比公平算法 上海交通大学学位论文原创性声明本人郑重声明：所呈交的学位论文，是本人在导师的指导下，独立进行研究。作所取得的成果。除文中已经注明引用的内容外，本论文不包含任何其他个人或集体己经发表或撰写过
