Analysis and simulation of a cache-based auxiliary user location strategy for PCS

The strategies commonly proposed to locate mobile users maintain a system of home and visited databases (home location registers or HLR, and visitor location registers or VLR) to keep track of user locations. The authors have previously proposed an auxiliary location strategy to augment the basic strategy; the auxiliary strategy is based on locally caching and reusing previously obtained user location information. The present paper compares the basic and auxiliary strategies based on both analysis and simulation