Mobile IP and Ad Hoc Networks: An Integration and Implementation Experience

• Main Authors: Chia-Ching, Shen, 沈家慶
• Other Authors: Yu-Chee, Tseng
• Format: Others
• Language: en_US
• Published: 2002
• Online Access: http://ndltd.ncl.edu.tw/handle/32844927192938180819

碩士 === 國立交通大學 === 資訊工程系 === 90 === Mobile IP has been widely accepted as a standard to support IP mobility in a wireless Internet environment to keep a session connected when a mobile host roams from subnet to subnet. Another emerging wireless network architecture that is gaining more and more popularity is the {\it mobile ad hoc network (MANET)}, which can be flexibly deployed in almost any environment without the need of infrastructure base stations. In order to move to an all-IP environment, there seems to be growing demand to integrate these two architectures together. In this paper, we propose to extend the typical {\it wireless access points} to multiple clusters of MANETs, each as a subnet of the Internet, and discuss how to support Mobile IP in such environment. Such integration is beneficial to both societies. From Mobile IP's prospective, Foreign Agents' service areas are not limited to hosts within a single (wireless) hop any more. From MANET's prospective, mobile hosts can immediately enjoy tremendous services already existing on the Internet. This article reports our integration and implementation experience based on IEEE 802.11b wireless LANs. Issues such as overlapping of MANETs, dynamic adjustment of mobile agents' service coverages, support of local broadcast and various communication scenarios are addressed. Discussion also covers required adjustments of Mobile IP and pros and cons of layer-2 and layer-3 implementation of MANETs. Performance results are also reported.