Mobile Agent-based Seamless Handoff for Mobile VPN

• Main Authors: Ko-Ching Wu, 吳科慶
• Other Authors: Chien-Chao Tseng
• Format: Others
• Language: zh-TW
• Published: 2005
• Online Access: http://ndltd.ncl.edu.tw/handle/57664499871260450651

碩士 === 國立交通大學 === 資訊工程系所 === 93 === Supporting mobility and security simultaneously is the basic motivation of this thesis. An intuitive solution may be the combination of two internet protocols, providing mobility and security respectively. Despite direct merging of two protocols reusing existent software and network hardware, reduced system efficiency is further caused by redundant elements shared by both protocols. Besides the resource squander of duplicate proceedings, a conflict may be break out between two protocols. Sacrifice or extra actions of one protocol for processes of other protocols may be caused. When Mobile Node changes its network domain or IP address, it usually needs a lot of procedures for supporting mobility and security. User would feel the break off of the connection, and the communication or internet protocol would suffer timeout in realistic applications. This thesis provides a method and system for mobility and security, comprising Virtual Private Network (VPN), Mobile Agent and some Mobile IP mechanisms. The mobile agent acts as a representative of mobile node, and executes pre-authentication and pre-negotiation with the multicast mechanism and the binding list of Mobile IP protocol to make mobile node continue the previously communication after changing network domain. VPN architecture not only provides security, but saves the handoff latency for mobile node. Therefore, the transmission performance and security of this system are the same as VPN, and the handoff latency is less than Mobile IP to make this system suit real-time protocols.