A delayed location registration procedure for wireless mobile communication networks

Wireless mobile communication networks support mobile terminals (MTs) which are free to travel within a service coverage area. In order to locate an M T effectively when a call is initiated, several location management schemes are proposed to keep track of its location. Current methods being used in IS-41 and GSM MAP for location management pose problems such as an increase in signaling traffic in the network, a ping-pong effect and a bottleneck c reated by signaling traffic at home location register (HLR). In this paper, we propose a new location management scheme that is to reduce the number o f location registrations at HLR by making the location registration at HLR unnecessary when an MIT moves into neighboring registration area (RA) or wh en it moves back to the original RA from neighboring RA. Our scheme employs a centralized database architecture using the HLR/VLR concept as in the IS -41 and GSM MAP but alleviates the above-mentioned problems. Analysis resul ts show that our scheme always outperforms current methods and shows an esp ecially better performance at low CMR (call to mobility ratio).