標題: Evaluation of distributed and replicated HLR for location management in PCS network
作者: Chen, GC
Lee, SY
資訊工程學系
Department of Computer Science
關鍵字: mobile computing;location management;HLR;replicated databases;PCS
公開日期: 1-Jan-2003
摘要: Personal Communication Service (PCS) network is the integration of cellular Network and conventional wired network. To support user mobility, the locations of the mobile stations (MSs) should be constantly tracked using a database. The widespread deployment of PCS will lead to a tremendous increase in the number of updates and queries to the location database. The centralized, stand-alone Home Location Register (HLR) in GSM can be a potential bottleneck. In case of the location database failure, incoming calls may be lost. According to the analysis of the load in HLR, we suggest replicating the HLR in order to increase its capacity and reliability. In this paper we evaluate the effects of the number of replicas in terms of query response time, misrouting probability of incoming calls and average cost per query. Another issue incurred in the replicated databases is data consistency. A concurrency control protocol called preemptive Read-One-Write-All (PROWA) protocol is also proposed.
URI: http://hdl.handle.net/11536/28292
ISSN: 1016-2364
期刊: JOURNAL OF INFORMATION SCIENCE AND ENGINEERING
Volume: 19
Issue: 1
起始頁: 85
結束頁: 101
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