Quality of service schemes for IEEE 802.11 wireless LANs: an evaluation
2003 (English)In: Journal on spesial topics in mobile networks and applications, ISSN 1383-469X, E-ISSN 1572-8153, Vol. 8, no 3, 223-235 p.Article in journal (Refereed) Published
This paper evaluates four mechanisms for providing service differentiation in IEEE 802.11 wireless LANs. The evaluated schemes are the Point Coordinator Function (PCF) of IEEE 802.11, the Enhanced Distributed Coordinator Function (EDCF) of the proposed IEEE 802.11e extension to IEEE 802.11, Distributed Fair Scheduling (DFS), and Blackburst. The evaluation was done using the ns-2 simulator. Furthermore, the impact of some parameter settings on performance has also been investigated. The metrics used in the evaluation are throughput, medium utilization, collision rate, average access delay, and delay distribution for a variable load of real time and background traffic. The simulations show that the best performance is achieved by Blackburst. PCF and EDCF are also able to provide pretty good service differentiation. DFS can give a relative differentiation and consequently avoids starvation of low priority traffic.
Place, publisher, year, edition, pages
2003. Vol. 8, no 3, 223-235 p.
Research subject Dependable Communication and Computation Systems
IdentifiersURN: urn:nbn:se:ltu:diva-4172DOI: 10.1023/A:1023389530496Local ID: 211d8370-b2a2-11db-bf9d-000ea68e967bOAI: oai:DiVA.org:ltu-4172DiVA: diva2:977036
Validerad; 2003; 20070110 (ysko)2016-09-292016-09-29Bibliographically approved