Title :
Performance of a priority-based dynamic capacity allocation scheme for wireless ATM systems
Author :
Babu, Thimma V J Ganesh ; Le-Ngoc, Tho ; Hayes, Jeremiah F.
Author_Institution :
Dept. of Electr. & Comput. Eng., Concordia Univ., Montreal, Que., Canada
fDate :
2/1/2001 12:00:00 AM
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
Keywords :
Markov processes; access protocols; asynchronous transfer mode; channel allocation; data communication; land mobile radio; multimedia communication; multiuser channels; packet radio networks; queueing theory; radio links; stochastic processes; telecommunication traffic; time division multiple access; visual communication; voice communication; ATM cell transmission scheduling; FIFO queue; analytical model; approximating MMPP sources; cell loss ratio; data traffic; first-in first-out queue; multimedia services; nonreal-time traffic; on-off sources; performance; priority-based dynamic capacity allocation; real-time traffic; simulation results; system capacities; traffic loads; two-state Markov-modulated Poisson processes; uplink TDMA frame; uplink capacity; video traffic; voice traffic; wireless ATM systems; Access protocols; Asynchronous transfer mode; Bandwidth; Bit rate; Media Access Protocol; Routing protocols; Telecommunication traffic; Time division multiple access; Traffic control; Wireless networks;
Journal_Title :
Selected Areas in Communications, IEEE Journal on
