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22 March 2001 GC-based dynamic QoS priority handoff scheme in multimedia cellular systems
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Proceedings Volume 4209, Multimedia Systems and Applications III; (2001)
Event: Information Technologies 2000, 2000, Boston, MA, United States
A dynamic call admission control (CAC) and its associated resource reservation (RR) schemes are proposed in this research based on the guard channel (GC) concept for a wireless cellular system supporting multiple QoS classes. A comprehensive service model is developed, which includes not only mobile terminals' bandwidth requirements but also their different levels of priorities, rate adaptivity and mobility. The proposed CAC policy selects the resource access thresold according to the estimated number of incoming call requests of different QoS classes. The amount of resources to be reserved is dynamically adjusted by considering neighboring-cell higher-priority calls which are likely to handoff. The handoff interaction between adjacent cells is estimated by using radio propagation in terms of the signal-to-noise ratio (SNR) and the distance of each active call in neighboring cells. Experiments are conducted by using the OPNET simulator to study the performance of the proposed scheme under various traffic conditions. It is shown that better QoS guarantees can be provided by the proposed CAC and RR schemes.
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Huan Chen, Sunil Kumar, and C.-C. Jay Kuo "GC-based dynamic QoS priority handoff scheme in multimedia cellular systems", Proc. SPIE 4209, Multimedia Systems and Applications III, (22 March 2001);

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