A Lazy Update Strategy for Minimizing Signaling Cost Using the Forwarding Pointer in Mobile IP
Myung-Kyu Yi, Ui-Sung Song and Chong-Sun Hwang Distributed Systems Laboratory Department of Computer Science and Engineering Korea University Seoul 136-701, Korea E-mail: {kainos, ussong, hwang}@disys.korea.ac.kr
Mobile IP provides an efficient and scalable mechanism for achieving host mobility over the Internet. Using Mobile IP, mobile nodes may change their points of attachment to the Internet without changing their IP addresses. However, this will results in a high signaling cost of updating the location of a mobile node if it moves frequently. In this paper, we propose a lazy update strategy for minimizing the signaling cost using the forwarding pointer in hierarchical Mobile IPv6. Our work focuses on minimizing the signaling cost by eliminating unnecessary binding update messages when a mobile node does not communicate with others while moving. The analytical results show that our approach achieves better performance than the hierarchical Mobile IPv6 when the call to mobility ratio is low and the length of the forwarding pointer chain is short.