標題: Location tracking with distributed HLR's and pointer forwarding
作者: Lin, YB
Tsai, WN
資訊工程學系
Department of Computer Science
關鍵字: deregistration;distributed database mobility management;home-location register;personal communications services;registration;visitor-location register
公開日期: 1-二月-1998
摘要: Location tracking operations in a personal communications services (PCS's) network are expensive. A location tracking algorithm called pointer forwarding has been proposed to reduce the location update cost, The key observation behind forwarding is that if users change PCS registration areas (RA's) frequently, but receive calls relatively infrequently, it should be possible to avoid registrations at the home-location register (HLR) database by simply setting up a forwarding pointer from the previous visitor-location register (VLR), Calls to a given user will first query the user's HLR to determine the first VLR, which the user was registered at, and then follow a chain of forwarding pointers to the user's current VLR. To reduce the "find" cost in call delivery, the PCS service provider may distribute HLR databases in the network. This paper integrates the concept of distributed HLR's with pointer forwarding, and the new scheme is referred to as the pointer forwarding with distributed HLR (PFDHLR). Since no registration to the HLR is performed in the pointer forwarding scheme when a user moves to the new locations, the cost of updating multiple HLR's is eliminated in PFDHLR. Our study indicates that PFDHLR may significantly reduce the mobility management cost compared with the single HLR approach.
URI: http://dx.doi.org/10.1109/25.661032
http://hdl.handle.net/11536/32814
ISSN: 0018-9545
DOI: 10.1109/25.661032
期刊: IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY
Volume: 47
Issue: 1
起始頁: 58
結束頁: 64
顯示於類別:期刊論文


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