Title :
Analysis of contention based access for best effort traffic on fixed WiMAX
Author :
Perera, Shehan ; Sirisena, Harsha
Author_Institution :
Department of Electrical & Computer Engineering, University of Canterbury, New Zealand
Abstract :
In this paper we analyze the medium access control (MAC) of fixed WiMAX with respect to best effort (BE) traffic. WiMAX employs a contention based method with exponential backoff to facilitate multiple access. A two-dimensional Markov chain can be used to accurately model the backoff procedure. From this we derived expressions for channel access probability, access delay, system throughput and resource usage. The accuracy of the model and its results are validated by simulations carried out on an IEEE 802.16d simulator. Constraints and limitations of the model are also discussed. Insight from this model can be used to optimize bandwidth usage and channel partitioning.
Keywords :
Bandwidth; Base stations; Delay; Downlink; Job shop scheduling; Quality of service; Telecommunication traffic; Throughput; Traffic control; WiMAX; IEEE802.16; Markov chain; best effort traffic; contention;
Conference_Titel :
Broadband Communications, Networks and Systems, 2007. BROADNETS 2007. Fourth International Conference on
Conference_Location :
Raleigh, NC, USA
Print_ISBN :
978-1-4244-1432-1
Electronic_ISBN :
978-1-4244-1433-8
DOI :
10.1109/BROADNETS.2007.4550482
