IP Paging for Mobile Hosts in Distributed and Fixed Hierarchical Mobile IP

IP Paging for Mobile Hosts in Distributed and Fixed Hierarchical Mobile IP

Paramesh C. Upadhyay (Sant Longowal Institute of Engineering & Technology, India) and Sudarshan Tiwari (Motilal Nehru National Institute of Technology, India)
DOI: 10.4018/978-1-4666-3902-7.ch012
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Abstract

The concept of Paging has been found useful in existing cellular networks for mobile users with low call-to-mobility ratio (CMR). It is necessary for fast mobility users to minimize the signaling burden on the network. Reduced signaling, also, conserves scarce wireless resources and provides power savings at user terminals. However, Mobile IP (MIP), a base protocol for IP mobility, does not support paging concept in its original form. Several paging schemes and micro-mobility protocols, centralized and distributed, have been proposed in literature to alleviate the inherent limitations of Mobile IP. In this paper, the authors propose three paging schemes for Distributed and Fixed Hierarchical Mobile IP (DFHMIP) and develop analytical models for them. Performance evaluations of these schemes have been carried out and results have been compared with DFHMIP without paging and with Dynamic Hierarchical Mobile IP (DHMIP) for low CMR values.
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IP paging enables a common infrastructure and protocol to support different wireless interfaces. According to Mobile IP regional paging (Haverinen, 2000), each host can stay in either of the two states: active, or idle, also called as dormant mode. For active hosts, it acts similar to Mobile IP whereas in dormant mode, the hosts can freely move within a paging area, a group of subnets, without any location registration with the network. Thus, the system has only coarse knowledge of whereabouts of the host. A mobile host performs registration only when it changes paging areas. The packets intended for a dormant host are terminated at a paging initiator. The paging initiator buffers the packets and sends the IP paging messages within the paging area. The subnet where the host is currently residing responds to this message. Then, the packets are forwarded to the recipient.

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