Call Admission Control vs. Bandwidth Reservation: Reducing Handoff Call Dropping Rate and Providing Bandwidth Efficiency in Mobile Networks

Authors:
Jianping Jiang;Ten-Hwang Lai
Affiliations:
-;-
Venue:
ICPP '00 Proceedings of the Proceedings of the 2000 International Conference on Parallel Processing
Year:
2000

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Abstract

In mobile (wireless) networks, one major concern about quality of service (QoS) is call dropping, where a handoff call is dropped due to insufficient wireless resources. Previous research on this issue suggested to reserve a certain amount of bandwidth for handoff calls. While such reservation schemes can reduce call dropping rate, it is at the cost of low bandwidth efficiency. In this paper, we propose a new approach that combines dynamic channel allocation and call admission control for bandwidth management. Simulation studies show that the proposed approach is capable of keeping the call dropping rate below a pre-specified value while improving bandwidth utilization by 20% to 30%.