超密集网络移动性管理算法研究及验证系统实现

发布时间：2018-03-31 20:08

本文选题：超密集网络　切入点：网络分簇　出处：《南京邮电大学》2016年硕士论文

【摘要】：随着人们日益增长的业务需求,无线网络面临着越来越大的挑战。为了满足人们对网络数据速率的需求,超密集网络成为解决这一问题的重要手段。在超密集网络环境下,传统的移动性管理算法已经无法适应未来网络的发展。如何解决超密集网络环境下的移动性管理问题,成为了未来网络发展的巨大挑战。本文在研究现有的移动性管理技术的基础上,主要作了以下几个方面工作:1)针对超密集网络的网络特点,运用生灭模型对网络进行建模,分析了网络的特点,提出基于生灭模型的可变保护信道的网络切换算法。根据网内的新呼叫和切换呼叫数量以及设备的切换预测,改变保护信道的数量。最后通过仿真结果表明,该算法有效地减少了呼叫切换阻塞率,增加了信道利用率。2)针对超密集网络的网络特点,基于网络分簇的思想提出了根据终端设备运动情况动态调节滞后余量的切换管理算法。在该算法中,基于小基站分簇化管理的前提,用户设备在小区间切换分为预切换和正式切换两个阶段,预切换阶段完成最佳目标小区选择、小区资源预留和预鉴权等操作,正式切换阶段根据预切换阶段监测的设备速度动态调节切换门限的滞后余量。仿真结果表明了该算法可以有效降低设备的切换时延和切换失败率。3)设计并完成了终端侧的移动性管理的验证系统。系统中,控制器不断广播自身信息,终端自动发现广播信息,自动登录控制器,并与控制器进行连接。同时,显示端显示了整个移动性管理过程。通过对验证系统整体和各个模块的设计,实现了各个模块的开发。最后,将代码移植到ARM开发板上,将系统各个模块进行联合调试,展现了系统运行过程。从最后运行结果可以看出,系统完成了对移动终端的自动注册与接入,很好地反映了移动性管理过程,达到了最初的系统设计目标。
[Abstract]:With the growing business needs, the wireless network is facing more and more challenges. In order to meet the demand of the network data rate, ultra dense network has become an important means to solve this problem. In the dense network environment, the traditional mobility management algorithm has been unable to adapt to the future development of the network. How to solve the mobility super intensive management problems under the network environment, has become a huge challenge to the future network development. Based on the study of the existing mobility management technologies, mainly for the following aspects: 1) according to the network characteristics of ultra dense network, using the birth death model for the network, analyzes the characteristics of the network, is put forward the birth death model variable protection channel switching algorithm based on the network. According to the new call and handoff call number and switching equipment prediction within the network, change the protection channel Number. Finally, the simulation results show that the algorithm can effectively reduce the call handoff blocking rate, increase the channel utilization rate.2) according to the network characteristics of ultra dense network, network clustering based on the idea of regulating hysteresis according to the terminal equipment movement dynamic switching management algorithm is proposed. In this algorithm, the premise of small base station cluster management based on user equipment in the handover is divided into pre handover and officially switched two stages, pre handover stage optimal target cell selection, cell resource reservation and pre authentication operation, officially switched according to hysteresis speed dynamic pre switching stage monitoring regulation switch threshold. Simulation the results show that the algorithm can effectively reduce the handoff delay and switching equipment failure rate.3) designed and completed the verification system mobility management terminal. The system controller. Continue to broadcast their information, broadcasting information automatic discovery terminal, automatic login controller, and connect with the controller. At the same time, the display side shows the mobility management process. Through the design verification of the whole system and each module, realize the development of each module. Finally, the code is transplanted to the ARM development board, the system each module is debugged, show the running process of the system. From the final results can be seen, the system completed the automatic registration and access to the mobile terminal, can well reflect the mobility management process, the system to achieve the original design goals.

【学位授予单位】：南京邮电大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TN929.5

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