| Traditional networks don't support mobile network communication, for most network equipments are constrained by wires. As the increasing demand of mobility from national defence and protable computer widely been using, people put forward new requirements for network communication. In this case, Ad hoc emerges as the times require. It overcomes the shortage of traditional networks, and achieves mobile data exchange. This embodies characteristic of communication system's 5W(Whoever, Whenever, Wherever, Whomever, Whatever) in some degree. The Wireless Mobile Self-organizing Network (WMSN) is a new kind of network architecture that combines the flexibility of Ad hoc network and the idea of user management of cellular network. The significance of this task lies in three aspects. First, how to use wireless means to constitute the mobility of the Internet. Second, can it attain convenient mobility as that of today's voice mobile communication systems. Third, if possible,how to attain it. One of the key technologies in this task is how to design and implement mobile user access management, in order to assure continuity of communication in the cource of user moving. This is the task of this paper.This paper introduces the background of the task briefly at first. Then, it analyzes the relative concepts and a model of AAA management, which stands for Authentication, Authorization and Accounting and which is the core function of user access management. It also introduces some technologies and protocols of user access management. In the following part of this paper, the network model and system framework of WMSN are described,for which two schemes of user access management are proposed next. This paper details one of the two schemes proposed aboveï¼centralized user access management, and deeply analyzes the key technologies involved in this scheme. At the end of this paper, it expatiates the design ideas of some modules and the implementation method based on Linux. Finally, I conclude the whole paper and put forward the work to do next. |
