Analysis of a hybrid cutoff priority scheme for multiple classes of traffic in multimedia wireless networks

Authors:
Bo Li;Samuel T. Chanson;Chuang Lin
Affiliations:
Hong Kong Univ. of Science of Technology, Kowloon, Hong Kong;Hong Kong Univ. of Science of Technology, Kowloon, Hong Kong;Institute of Informatiion Economics and Technology, Beijing, China
Venue:
Wireless Networks
Year:
1998

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Abstract

In this paper, we propose and analyze the performance of a new handoff scheme called hybrid cutoff priority scheme for wireless networks carrying multimedia traffic. The unique characteristics of this scheme include support for N classes of traffic, each may have different QoS requirements in terms of number of channels needed, holding time of the connection and cutoff priority. The proposed scheme can handle finite buffering for both new calls and handoffs. Futhermore, we take into consideration the departure of new calls due to caller impatience and the dropping of queued handoff calls due to unavailability of channels during the handoff period. The performance indices adopted in the evaluation using the Stochastic Petri Net (SPN) model include new call and handoff blocking probabilities, call forced termination probability, and channel utilization for each type of traffic. Impact on the performance measures by various system parameters such as queue length, traffic input and QoS of different traffic has also been studied.