Investigating caching strategies in Personal Communication Services

Personal Communication Services Systems provides global roaming and improved quality of services irrespective of the location of its users. One of the important and challenging issues in personal communication services systems is location management, which keeps track of the movement of the users. The existing user location strategies used for location management suffers from high signaling traffic in locating the mobile users. In order to augment these basic location strategies several auxiliary strategies are used. Caching - auxiliary strategy which helps to reduce the signaling loads on the basic strategies. This paper aims at investigating the various categories of caching strategy. We investigate the technical significance of each technique that will be useful for the future research. This auxiliary technique helps to optimize the overall location cost of the basic user location strategies. The key differences from the previous works are categorization and comparison of the caching techniques.