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Journal of Information Science and Engineering, Vol. 23 No. 2, pp. 421-439 (March 2007)

Mobility Management Using P2P Techniques in Wireless Networks*

Shou-Chih Lo
 Department of Computer Science and Information Engineering
National Dong Hwa University
Hualien, 974 Taiwan
E-mail: sclo@mail.ndhu.edu.tw

Mobility management is an important task in wireless networks. The Mobile IP protocol provides a basic solution to mobility management in future all-IP wireless network environments. However, Mobile IP suffers from several problems such as triangular routing, long distant and frequent registration update. In this paper, we propose to use the Peer-to-Peer (P2P) network technology to improve Mobile IP. We organize home agents into P2P networks, and take addressing binding data as shard data. A user¡¦s address binding will be hashed into the P2P network and can be queried using P2P lookup mechanisms. We can use a key value (e.g., email or IP address, telephone number) in the P2P lookup, to uniquely locate a user¡¦s address binding. The potential characteristics of load balancing and fault tolerance in a P2P network make our approach more scalable and robust than the standard Mobile IP. To reduce the registration update cost, we chose a dynamic home agent for each mobile user that is close to the user¡¦s location. We study the performance of our proposed approach both qualitatively and quantitatively.

Keywords: wireless networks, peer-to-peer networks, mobility management, mobile IP, dynamic home agent assignment

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Received February 1, 2005; revised April 25, 2005; accepted May 23, 2005.
Communicated by Ten-Hwang Lai.
* The preliminary version of this paper was presented in the 6th IFIP IEEE International Conference on Mobile and Wireless Communication Networks, Paris, France, October 25-27, 2004.