User Mobility Management in the PCS Network Through the Placement of Hierarchical Databases

Abstract

The personal communication service (PCS) networkis the next generation wireless communication networkthat allows users to communicate with each other oraccess information in the network any time and anywhere. It is the integration of the cellulartelephone network, the conventional telephone network,and the digital communication network. User movementswithin the network coverage area must be tracked using a database. A hierarchical distributeddatabase architecture localizes database operationscaused by user movements and call setup requests, andreduces traffic in the signaling network. Placement of the database in the signaling networkaffects performance of the network. A new method ispresented to find the best database placement scheme fora given estimation of user movement and call setuprequest rates. This database placement scheme minimizesthe delays of messages resulting from user movements andcall setup requests in the signaling network.