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Cost Reduction of Location Registration Using the LiEy UBdate Strategy in Hierarchical Mobile IPv6  

Yi Myung-Kyu (고려대학교 컴퓨터학과)
Hwang Chong-Sun (고려대학교 컴퓨터학과)
Publication Information
Journal of KIISE:Information Networking / v.32, no.3, 2005 , pp. 370-381 More about this Journal
Abstract
Mobile IP provides an efficient and scalable mechanism for host mobility within the Internet. Using Mobile If, mobile nodes may change their point of attachment to the Internet without changing their If address. However, it would result in a high signaling cost. To reduce the signaling cost, we factor in the fact that mobile users will not be actively communicating much of the time. In fact, there Is no necessity to send a binding update message to the home agent when an mobile node does not communicates with others while moving. From this point of view, we propose a lazy update strategy for minimizing signaling cost using the forwarding pointer in hierarchical Mobile IPv6. In our proposal, binding updates are sent only when a mobile node is in a busy mode. If an mobile node is in a dormant mode, binding update messages are delayed until busy mode using the forwarding pointer. As a result, our proposal can reduce the total signaling cost by eliminating unnecessary binding update messages when a mobile node Is in a dormant mode. In addition to, our proposal reduces unnecessary location update cost resulting from ping-pong effect under mobile node's dormant mode. Analysis results using the discrete analytic model presented in this paper shows that our proposal can has superior performance than hierarchical Mobile nv6 when the call-to-mobility ratio is low and the length of the forwarding pointer chain K is low.
Keywords
Mobile computing; Mobile IPv6; Hierarchical Mobile IPv6; Lazy Update; Locatiom Management;
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