Tolerating visitor location register failures in mobile environments

Saad Biaz, Nitin H Vaidya

Research output: Contribution to journalConference articlepeer-review


For mobile users who move frequently but receive relatively rare calls, a forwarding scheme has been shown to outperform the normal IS-41 location management scheme. But the forwarding scheme is more vulnerable to failure of intermediate Visitor Location Registers (VLRs) than the IS-41 scheme. We propose two simple variations to the forwarding scheme to address the fault tolerance weakness. One is based on the idea of maintaining two paths from the home location server to the last VLR. The second scheme is based on the knowledge of the neighbors of the faulty VLR. We evaluate and compare the performance of these location management schemes.

Original languageEnglish (US)
Pages (from-to)109-117
Number of pages9
JournalProceedings of the IEEE Symposium on Reliable Distributed Systems
StatePublished - 1998
EventProceedings of the 1998 IEEE 17th Symposium on Reliable Distributed Systems, SRDS - West Lafayette, IN, USA
Duration: Oct 20 1998Oct 23 1998

ASJC Scopus subject areas

  • Software
  • Theoretical Computer Science
  • Hardware and Architecture
  • Computer Networks and Communications


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