Analysis of caching-based location management in personal communication networks

Personal communication networks support the delivery of communication services as the user moves from one region to another. When a mobile user/terminal receives a call, the network has to quickly determine its current location. The existing approach suffers from high delay in locating the mobile as it requires maintaining the current location in a stable storage that has to be always consulted to reach the mobile. To reduce this delay, many proposed schemes rely on caching the locations of mobiles, especially those which do not move too frequently. To measure mobility, the node that originates the call usually measures only those movements that it sees between successive calls to that mobile. In this paper, we present a caching scheme based on fully disseminating the location updates of mobiles to every node so as to increase the chance that the cache entry points to the correct location of the mobile user. We analyze our full dissemination based scheme and compare it to other caching and non-caching based schemes.