標題: An analysis of location record checkpointing interval for mobility database in PCS networks
作者: Chang, Hung-Hsin
Chang, Ming-Feng
Tseng, Chien-Chao
資訊工程學系
Department of Computer Science
關鍵字: Personal communications services;Mobility database;Location register (HLR/VLR);Failure restoration;Checkpoint
公開日期: 1-十一月-2009
摘要: Mobility database that stores the users' location records is very important to connect calls to mobile users on personal communication networks. If the mobility database fails, calls to mobile users may not be set up in time. This paper studies failure restoration of mobility database. We study per-user location record checkpointing schemes that checkpoint a user's record into a non-volatile storage from time to time on a per-user basis. When the mobility database fails, the user location records can be restored from the backup storage. Numeric analysis has been used to choose the optimum checkpointing interval so that the overall cost is minimized. The cost function that we consider includes the cost of checkpointing a user's location record and the cost of paging a user due to an invalid location record. Our results indicate that when user registration intervals are exponentially distributed, the user record should never be checkpointed if checkpointing costs more than paging. Otherwise, if paging costs more, the user record should be always checkpointed when a user registers.
URI: http://dx.doi.org/10.1007/s11276-008-0097-2
http://hdl.handle.net/11536/6542
ISSN: 1022-0038
DOI: 10.1007/s11276-008-0097-2
期刊: WIRELESS NETWORKS
Volume: 15
Issue: 8
起始頁: 991
結束頁: 998
顯示於類別:期刊論文


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