Study And Implement Of Mobile IP

With the mobile communication technology and Internet technology unceasing development, two kind of technologies mutually start to fuse. It is more important of using mobile IP technology for such fusing. Mobile IP offer the mobile devices freely seamless roaming among Internet, Ethernet and wireless network.The thesis deeply analyses basic mobile IP protocol. It describes the working course of mobile IP, and point out the disadvantages of mobile IP protocol for practice using in real network environment. In order to settle the problems of basic mobile IP protocol, the thesis brings the whole resolve project of mobile IP. The project improves and extends the mobile IP protocol. It uses AAA server for authentication of mobile users, and distributes dynamic key to home agent and mobile node. It improves on the registration course of mobile nodes, and enhances the registration safety of mobile nodes. It enhances the safety of data transmission using ipsec technology. It makes use of route optimization technology to improve the performance of data transmission. It makes use of NAT through technology to settle the problem that mobile IP can not pass through the NAT device. It makes use of reverse tunnel technology to settle the problem that mobile IP data packets can not pass through the outer router, because the source IP address of data packets is maybe invalid. The thesis deeply analyses and settles the above problems, so mobile IP can work in varies networks.Last the thesis gives an implement of home agent and mobile node client. With the successful implement, the mobile IP solved project can provide the business supply on wireless and 3G networks.