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| Titel: |
COLLISION-AWARE ADAPTION OF CONTENTION WINDOW IN 802.11E WIRELESS LAN |
| Auteur: |
Shih-Wei Pan Jung-Shyr Wu Ming-Wei You |
| Verschenen in: |
International journal of computer networks & communications |
| Paginering: | Jaargang 1 (2009) nr. 2 pagina's 12-24 |
| Jaar: |
2009 |
| Inhoud: |
One of the key challenges in designing a quality of service (QOS) scheme for IEEE 802.11 wireless LANs(WLANS) is reducing collisions and improving throughput. Existed Adaptive contention windowsmechanisms can reduce collisions of all traffic. However, adaptive contention window algorithms cannotguarantee the absolute priority of the high-priority traffic. Especially in the heavy loading, low-prioritytraffics will introduce unnecessary collisions and cause unsuccessful transmission. Our scheme aims toshare the transmission channel efficiently and to provide the absolute differentiated traffic scheme.Relative priorities are provisioned by adjusting the range of the back-off timer of low-priority trafficclass taking into account both applications requirements and network conditions. We demonstrate theeffectiveness of our solution by comparing with existing approaches through extensive simulations.Results show that our scheme reduces frame delay as well when traffic load is heavy. Furthermore, ourscheme is simple and easy to implement. |
| Uitgever: |
Academy & Industry Research Collaboration Center (provided by DOAJ) |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
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