A batch-update strategy for the distributed HLRs architecture in PCS networks

Hang Wen Hwang, Chien-Chao Tseng*, Ming-Feng Chang

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


Owing to the increasing population of mobile subscribers, the rapidly expanding signaling traffic has become a challenge to the mobility management in PCS networks. Multiple database schemes to reduce signal traffic and to solve the bottleneck problem of the single home location register (HLR) architecture have been proposed by many researchers. However, in most of the multiple location databases or HLR systems, extra signaling is required for the multiple database updates. We propose a batch-update strategy, instead of the immediate update method, for the location-tracking schemes with replication to reduce the signaling overhead. In this paper, we first introduce a distributed HLRs architecture in which each HLR is associated with a localized set of VLRs and the location registrations and queries are processed locally. Then we propose our batch-update strategy and present two pointing schemes for inter-HLR call deliveries. The numerical result shows that our approach can effectively decrease the signaling cost of location registration and call delivery compared with the IS-41 standard.

Original languageEnglish
Pages (from-to)311-327
Number of pages17
JournalWireless Communications and Mobile Computing
Issue number3
StatePublished - May 2003


  • Batch update
  • Call delivery
  • Distributed HLRs
  • Location registration
  • Mobile terminal
  • Mobility management


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