A Fault-Tolerant Scheme for Mobility Management in PCS Networks

Authors:
Ming-Jeng Yang;Yao-Ming Yeh
Affiliations:
Department of Information Technology, Takming College, Taipei, Taiwan 114;Department of Information & Computer Education, National Taiwan Normal University, Taipei, Taiwan 106
Venue:
Wireless Personal Communications: An International Journal
Year:
2006

Citing 6
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Abstract

One of the most important and challenging issues in the design of personal communication service (PCS) systems is the management of location information. In this paper, we propose a new fault-tolerant location management scheme, which is based on the cellular quorum system. Due to quorum's salient set property, our scheme can tolerate the failures of one or more location server(s) without adding or changing the hardware of the systems in the two-tier networks. Meanwhile, with a region-based approach, our scheme stores/retrieves the MH location information in the location servers of a quorum set of the local region as much as possible to avoid long delays caused by the possible long-distance of VLR and HLR. Thus, it yields better connection establishment and update delay.