Paper Improvement of the Performance of Database Access Operations in Cellular Networks

Abstract—Reducing the traffic volume of location updating is a critical issue for tracking mobile users in a cellular network. Besides, when user x wants to communicate with user y, the location of user y must be extracted from databases. There-fore, one or more databases must be accessed for updating, recording, deleting, and searching. Thus, the most important criterion of a location tracking algorithm is to provide a small database access time. In this paper, we propose a new loca-tion tracking scheme, called Virtual Overlap Region with For-warding Pointer (VF), and compare the number of database accesses required for updating, deleting, and searching opera-tions for the proposed scheme and other approaches proposed for cellular networks. Our VF scheme like Overlap Region scheme reduces the updating information when a user fre-quently moves in boundaries of LAs. Unlike Overlap Region, the VF can reduce number of database accesses for searching users ’ information. Keywords—Cellular networks, deleting cost, GSM, searching cost, tracking mobile users, UMTS, updating cost