A Pointer Forwarding Scheme for Fault-Tolerant Location Management in Mobile Networks

摘要

One of the main challenges in personal communication services is to locate many mobile terminals that may move from place to place frequently. This kind of system operation is called location management. This task entails sophisticated signaling traffic and database queries. Several strategies have been proposed to improve the efficiency of location management. These strategies use location register databases to store the current locations of mobile terminals, and are vulnerable to failure of the location registers. In this paper, we propose a fault-tolerant pointer forwarding scheme with distributed home location register in order to tolerate the failure of location registers. The performance of the proposed scheme is evaluated analytically by simulation, and is compared with Biaz's bypass forwarding strategy and two-path forwarding strategy.