An aggressive approach to failure restoration of PCS mobility databases

Authors:
Tsan-Pin Wang;Chien-Chao Tseng;Wen-Kuang Chou
Affiliations:
National Chiao Tung University, Hsinchu, Taiwan;National Chiao Tung University, Hsinchu, Taiwan;Management, Providence University, ShaLu, Taiwan
Venue:
ACM SIGMOBILE Mobile Computing and Communications Review
Year:
1997

Citing 3
Cited 2

Failure restoration of mobility databases for personal communication networks

Wireless Networks
Mobile Communications Design Fundamentals

Mobile Communications Design Fundamentals
Mobile Cellular Telecommunications Systems

Mobile Cellular Telecommunications Systems

Analytical Results for Optimal Choice of Location Update Interval for Mobility Database Failure Restoration in PCS Networks

IEEE Transactions on Parallel and Distributed Systems
An analysis of location record checkpointing interval for mobility database in PCS networks

Wireless Networks

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Abstract

In Personal Communications Services (PCS) networks, subscribers' current locations are usually maintained using a two-level hierarchical strategy with two types of databases, specifically, VLRs and HLRs. Location records might be lost due to the malfunction of mobility databases. GSM uses aggressive restoration to restore the HLR data from the VLRs. However, previous work on aggressive restoration is based on periodic checkpointing and might not be feasible in general. This paper proposes a novel aggressive approach, based on aperiodic checkpointing, to back up HLRs and VLRs. The aperiodic checkpointing scheme could use the number of uncheckpointed location records as the threshold value to trigger a backup process. Performance analysis shows that aperiodic checkpointing is more feasible than periodic checkpointing for aggressive restoration.