An aggressive approach to failure restoration of PCS mobility databases

Wang, Tsan-Pin; Tseng, Chien-Chao; Chou, Wen-Kuang

doi:10.1145/583992.583994

Cited by 13 publications

(6 citation statements)

References 4 publications

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“…An aperiodic checkpointing of the HLR and VLRs with location update on demand is proposed in [5]. In this scheme, VLR databases are backed up in the non-volatile storages at the time of exceeding the location update counter of the corresponding VLR to a threshold value.…”

Section: Related Workmentioning

confidence: 99%

“…Suppose that the normalized cost for paging in an RA is 1. So, the normalized cost for the periodic checkpointing approach under the normal operation is as follows [5].…”

Section: Analytical Modelingmentioning

confidence: 99%

“…So, the normalized cost for the periodic checkpointing approach after the failure under this dependency is as follows [5].…”

Section: Analytical Modelingmentioning

confidence: 99%

“…As a result, VLR mobility database recovery is very much necessary after the failure to assure the continuous service availability to subscribers without any disruption of communication. An extensive work has been done on mobility database failure recovery and studied in [1], [2], [3], [4], [5], [6].…”

Section: Introductionmentioning

confidence: 99%

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A Selective Aperiodic Checkpointing Approach for VLR Failure Restoration in Wireless Mobile Networks

Mst.¹,

Ali²

2010

IJCA

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This paper proposes a new selective aperiodic checkpointing approach for VLR (Visitor Location Register) failure restoration in wireless mobile networks. In this approach, the VLR data are backed up in the non-volatile storage whenever the location update counter for that VLR exceeds the pre-determined threshold. It restores the backed up VLR data after the failure of the VLR and sends location confirmation request messages only to the selected Registration Areas (RAs) whose information is updated between the time period of back up and failure of the VLR. This is necessary as this information is obsolete in the backed up VLR for this reason and needs to be updated in the restored VLR. However, previous work on aggressive restoration based on periodic and aperiodic checkpointing also provide solutions for VLR database failure recovery. But these solutions are not feasible as they broadcast the location confirmation request messages to the RAs whose location information is found to be obsolete during the restoration. The analytical model and experimental results also show that the proposed method outperforms other previous approaches as it selectively sends the location confirmation request messages instead of broadcasting to the RAs during VLR restoration process.

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Section: Related Workmentioning

confidence: 99%

“…Suppose that the normalized cost for paging in an RA is 1. So, the normalized cost for the periodic checkpointing approach under the normal operation is as follows [5].…”

Section: Analytical Modelingmentioning

confidence: 99%

“…So, the normalized cost for the periodic checkpointing approach after the failure under this dependency is as follows [5].…”

Section: Analytical Modelingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

A Selective Aperiodic Checkpointing Approach for VLR Failure Restoration in Wireless Mobile Networks

Mst.¹,

Ali²

2010

IJCA

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show abstract

“…It is also possible for HLR to aggressively restore its location records by requesting the known VLRs to provide the exact location information. Wang et al [23] proposed a novel aggressive approach for failure recovery of PCS and analyzed its performance.…”

Section: Introductionmentioning

confidence: 99%