IEEE/ACM Transactions on Networking (TON)
Threshold Priority Policy for Channel Assignment in Cellular Networks
IEEE Transactions on Computers - Special issue on mobile computing
Wireless and Mobile Network Architectures
Wireless and Mobile Network Architectures
A Dynamic Channel Pre-Reservation Scheme for Handoffs with GoS Guarantee in Mobile Networks
ISCC '99 Proceedings of the The Fourth IEEE Symposium on Computers and Communications
Wireless Communications & Mobile Computing
Dynamic channel reservation based on mobility in wireless ATM networks
IEEE Communications Magazine
Call admission control in multiservice high altitude platform (HAP) W-CDMA cellular systems
Computer Networks: The International Journal of Computer and Telecommunications Networking
Exploiting mobility diversity in rate adaptive CDMA networks
Computers and Electrical Engineering
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Call dropping is considered more annoying than call blocking in wireless cellular networks. The cost of the classical method of employing guard channels to decrease the call dropping rate is the increase in call blocking rate. Since subscriber mobility changes in time, the number of handoff attempts in each cell is subject to fluctuations, making static assignments (or periodical update) of a given number of guard channels inefficient. In this paper, we propose an adaptive scheme that employs reservations, instead of static assignments, to adaptively adjust the number of guard channels in each cell according to the current requirements. Thus, unnecessary allocation of guard channels is avoided resulting in a lower cost in terms of call dropping. The reservation requests are made according to the recent mobility pattern of the subscriber. A likelihood value is associated with each reservation request so that fewer channels are reserved by benefiting from the statistical accumulation of the requests. The channels are reserved by considering the interference that would be created once they are in use. The proposed scheme is evaluated against the classical guard channel scheme with a realistic mobility model.