Mobility Management for Multimedia Mobile Networks

在过去的十年里，移动通信的部署一直是惊人的。移动通信和计算的结合产生了一种新的分布式网络，称为移动计算系统。多媒体移动网络是一种新型的移动通信系统，它使用户能够在任何时间、任何期望的地点之间经济地传输任何形式的信息。移动性管理，即如何跟踪从一个地方移动到另一个地方的移动用户，是多媒体移动网络中最重要的问题之一。移动用户是指使用车载或手持电话或便携式计算机收发电话的用户。移动性管理有两种：静态方案和动态方案。在现有的移动网络中，使用的是静态方案。针对静态方案下的位置管理问题，提出了一种动态位置管理方法。在动态方案中，位置区域的大小是根据移动终端的移动性和呼叫模式的变化动态确定的，本文研究了静态和动态移动性管理方法。提出了适用于多媒体移动网络的最优动态移动性管理方法。另一个重要贡献是首次建立了新的解析模型，用于研究具有真实网络架构的多媒体移动网络的动态和静态移动性方法的性能。第三个贡献是提出了一种有效的数据库管理方法来管理多媒体移动网络中的移动性，并将多媒体移动网络视为分布式/并行系统的扩展。与分布式、高性能并行系统相关的工作已有很多。

Over the last decade, deployment of mobile communications has been phenomenal. The integration of mobile communications and computing results in a new distributed network, referred to as a mobile computing system. Multimedia mobile networks are new mobile communication systems which will enable users to economically transfer any form of information between any desired locations at any time.Mobility management, i.e., how to track the mobile users that move from place to place is one of the most important issues in multimedia mobile networks. The mobile users are the subscribers that use either the automobile or hand held telephones or portable computers to send and receive calls.There are two kinds of mobility managements : static schemes and dynamic schemes. In the existing mobile networks, the static schemes are used. Under the static schemes, however, cannot catch the moving patterns of mobile users.Dynamic location management methods are proposed for dealing with the problems of static schemes. In dynamic schemes, the size of a location area is determined dynamically according to the changes of mobility and calling patterns of mobile terminals.In the research, we study both the static and dynamic mobility management methods. We have proposed the optimal dynamic mobility management method for the multimedia mobile networks. Other important contribution is the novel analytic model firstly established for the performance study of dynamic and static mobility methods for multimedia mobile networks with real network architectures. The third contribution is the proposed effective database management method for the mobility management in multimedia mobile networks.Furthermore, we consider the multimedia mobile networks as an extension to distributed/parallel systems. Many works related to distributed and high-performance parallel systems have been conducted.