Design and Analysis of Fault-Tolerance in Mobile IPv6 Networks

• Main Authors: Chien-Chun Hsu, 徐建鈞
• Other Authors: Jenn-Wei Lin
• Format: Others
• Language: zh-TW
• Published: 2005
• Online Access: http://ndltd.ncl.edu.tw/handle/19871121905402781754

碩士 === 輔仁大學 === 資訊工程學系 === 93 === With the rapid development of Internet, IPv6 has been designed to overcome some problems within IPv4 (e.g. shortage of IPv4 address space, the explosion of routing tables, and security problem, etc) and to provide the solution for the next generation networks. Due to the growing of wireless networks, the mobility support should be considered. Mobility support in IPv6 called Mobile IPv6 which now has being standardized. Mobile IPv6 provides widespread mobility management for the IPv6 protocol. It also provides many improvements compared to Mobile IPv4, such as route optimization, protocol extensions and IP Security (IPSec). To provide a reliable Mobile IPv6 network, fault tolerance should be taken into account the network design. This thesis presents a new efficient fault-tolerant approach for Mobile IPv6, which handles the failure problems of the two major components (access router and home agent) in the Mobile IPv6 network. With the fault tolerance of the access router, the proposed approach utilizes survival access routers to dynamically constitute a failure-tolerant access router set. Then, the workload of the faulty access router is distributed to be handled by the access routers in the fault-tolerant set. As for the fault tolerance of the home agent, the proposed approach is based on the external home address generation. Each mobile station owns two home addresses: an external home address and a default home address. The external home address is varied as the mobile station moves. When a failure is detected in the default home agent of a mobile station, the mobile station can use its external home agent to select another home agent to serve it. To demonstrate the effectiveness of the proposed approach, extensive simulations were performed to show the fault-tolerant improvement by using the simulation tool network simulator, ns-2.