Movement-based location update and selective paging for PCS networks
IEEE/ACM Transactions on Networking (TON)
Reducing location update cost in a PCS network
IEEE/ACM Transactions on Networking (TON)
Mobile users: to update or not to update?
Wireless Networks
A location-based mobility tracking scheme for PCS networks
Computer Communications
Performance Evaluation of Pipeline Paging under Paging Delay Constraint for Wireless Systems
IEEE Transactions on Mobile Computing
On-Bound Selection Cache Replacement Policy for Wireless Data Access
IEEE Transactions on Computers
Modelling and cost analysis of location management scheme for PCS networks
International Journal of Information and Communication Technology
Backoff strategies for demand re-registration in PCS database failure recovery
Computer Communications
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One of the most important issues in Personal Communication Service (PCS) networks is location management, which keeps track of the Mobile Terminals (MTs) moving from place to place. In this paper, we analytically derive cost functions of location updates and paging for a dynamic movement-based location management scheme for PCS networks with two-tier mobility databases. We prove analytically that there is a unique optimal movement threshold that minimizes the total cost of Home Location Register location updates, Visitor Location Register location updates, and paging, per call arrival. An effective algorithm is proposed to find the optimal movement threshold. Furthermore, we propose a hybrid location management scheme, in which when the call-to-mobility ratio is larger than a threshold, the optimal dynamic movement-based scheme is adopted. Otherwise, the static location update is adopted. The Newton approximation method is adopted to find this threshold. Our study shows that the proposed hybrid scheme outperforms both the dynamic movement-based scheme and the static location update scheme.