【作者】 蒋群艳；

【导师】 蒋铃鸽；

【作者基本信息】 上海交通大学 ， 通信与信息系统， 2007， 硕士

【摘要】 未来的无线通信的发展目标是建成一个基于IP协议的,融合了各种类型的无线网络,公共的、灵活的、无缝的异构网络。其中,各种异构的无线接入方式对等地接入到全IP化的核心网中。本文结合移动通信技术和IP技术的发展趋势及人们对移动数据通信业务的不断需求,在对目前各种无线网络技术进行深入了解的基础上,从全IP异构网络的融合方式、融合结构、异构网络间的切换过程、切换算法、全IP网络的移动性管理等多方面对全IP异构网络融合的关键问题做了讨论。其中,重点对全IP异构网络融合中的多目标判断的切换问题和满足无缝融合移动性管理问题进行了深入研究,提出了切实可行的方案。本论文通过研究不同无线通信网络的体系结构、运营方式、切换技术、位置管理、资源管理等内容,提出了2G网络向3G网络的平滑过渡方案,以及GSM和CDMA网络的互联互通方案。以GSM、WCDMA、CDMA20001X和WLAN这几种主流异构网络为例,总结了蜂窝网和无线局域网融合的紧耦合方案和松耦合方案。分析了两种方案各自的优缺点与如何选择的问题。异构网络间的垂直切换涉及到各个不同的网络,它们的网络结构、接入技术、性能评价标准都各不相同。因此,研究异构网络间的垂直切换算法是全IP异构无线网络融合中要解决的关键问题。现有的同构网络中的切换算法,显然已经不能适应要求。在本论文中,我们将异构网络的切换过程进行重新细分,更加突出了目标网络选择过程的重要性。在对现有的移动通信系统中的切换算法进行总结的基础上,本文提出了一种基于AHP的多目标判断切换算法。该算法基于运筹学理论,可以综更多还原

【Abstract】 The future prospect of wireless communication is to establish a public, flexible and seamless heterogeneous network, which is based on IP protocol, and combine different kinds of wireless networks to IP core network. This thesis discussed the mode and structure of heterogeneous network integration, the handoff process, algorithms and all IP mobility management. It especially researched on two aspects: multi-object handoff and seamless mobility management, and finally, proposed realizable schemes.This thesis researched various wireless networks on network architecture, operating model, handoff technology, position management and resource management, and also proposed a smooth scheme for 2G to 3G transition and the internetworking of GSM and CDMA systems. Take GSM, WCDMA, CDMA20001X and WLAN for example, we summarized the tight coupling and loose coupling schemes, and analyzed their differences.Vertical handoff is a key problem in all IP heterogeneous network integration. It deals with different network structure, access technology, and performance evaluation. Obviously, current handoff algorithms can not satisfy such requirement. In this thesis, we redivide the handoff process, emphasized the network selection process. After a conclusion of current handoff algorithm, we proposed a multi-object handoff algorithm based on AHP. AHP is an operational theory, which can make judgment for complex multi-object handoff problem. The algorithm proposed in this thesis can take an overall consideration; calculate more accurate weight of factors through the pairwise comparison matrix. Besides, it provides consistent test method.更多还原