Performance of a priority-based dynamic capacity allocation scheme for wireless ATM systems

Authors:
T. V.J. Ganesh Babu;T. Le-Ngoc;J. F. Hayes
Affiliations:
Dept. of Electr. & Comput. Eng., Concordia Univ., Montreal, Que.;-;-
Venue:
IEEE Journal on Selected Areas in Communications
Year:
2006

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Abstract

The performance of a priority-based dynamic capacity allocation suitable for wireless ATM systems is presented. The scheduling of ATM cell transmission in each uplink TDMA frame is based on a priority scheme with priority given to real-time traffic over nonreal-time traffic. Real-time traffic exceeding the uplink capacity is lost while nonreal-time traffic that cannot be served is stored in a first-in first-out (FIFO) queue. An analytical model is developed to evaluate the cell loss ratio (CLR) of both real-time and nonreal-time traffic. Aggregate voice, video, and data traffic is modeled by three two-state Markov-modulated Poisson processes (MMPPs). Analytical results for different system capacities and various traffic loads and scenarios are discussed. Simulation results with on-off sources and approximating MMPP sources are also presented