Performance Comparison on Multi-Tier Database Systems in Multi-Tier Personal Communications Serves Systems

Abstract

Two possible multi-tier database system architectures, Centralized HLR Architecture (CHA) and Decentralized HLR Architecture (DHA), for multi-tier PCS systems are proposed. We also propose mobility management strategies for the two proposed architectures. Under some assumptions, performance metrics are derived on the query response time, the update response time, and the traffic volume produced in the two architectures. Finally, the analysis results of CHA and DHA are made, and the pros and cons of the two proposed architectures are figured out. From the analysis results, it is found that the DHA performs better than the CHA except the update response time.