Wireless Self-organization Of The Internet User Management - Functional Design Of The Radius Server And Realization

With the rapid development and gradual mergence of Personal Wireless Communication and IP technology, and with more and more high-tech digital electronic products available, people are eager to acquire trustworthy communication anywhere and anytime. In the meanwhile, they also want to enjoy multiple services such as audio, video, data and so on.Nowadays, there are three main popular networks: Mobile Wireless Communication network, IP network, and Ad Hoc network. Combining the advantages of these networks, we design a new type of multi-hop network named Wireless Mobile Self-organized Network (WMSN). WMSN is independent of wired infrastructure and can be deployed easily and flexibly. It can provide Internet access for its subscribers. Especially its mobility support lays a foundation for personal communication. The difference from traditional networks makes user management and network security great challenges in WMSN. Thus, it is very important how to ensure the subscribers' benefits and permit them enjoy the network resource, how to prohibit no license users access the network, how to maintain subscribers' communication during handoff. All these are crucial technologies in our project and also the central task in the thesis. For the two-hierarchy network architecture, we put forward a centralized subscriber management solution in a management realm. This solution is based on the AAA function provided by the RADIUS server and extends new functions of location register and location tracking of the wireless hosts. We make full use of the user-NAS-RADIUS Server three-section model to realize authentication, authorization, accounting and location management. So even if the user is in motion, he might be always online. The paper analyzes the centralized user management solution and expatiates on how to design and implement it on the RADIUS Server part. Based on the FreeRADIUS, I program to extend the server's function of user authentication, user register and user location query for our WMSN.At the end of the thesis, I focus on the security of the user authentication system and bring forward an alternative front-end authentication solution upon 802.1x-EAP protocol. The WR and RADIUS Server is not secure enough, so all these solutions need to be researched and developed in next step.