A Media Access Control Scheme for Service Differentiation in Ad hoc Networks |
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| Authors: | YANG Yan-bin GUO Hui-qing |
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| Institution: | [1]School of Electronic and Information Engineering, South China University of Technology, Guangzhou 510641, China [2]Department of Communications, Guangdong Vocational Technol9gy College of Posts ＆ Telecom, Guangzhou 510630, China |
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| Abstract: | IEEE 802.11 distributed coordination function(DCF)can alleviate the collision and hidden station problem,but it doesn't differentiate traffic categories(TC).Therefore,it can't provide sufficient quality of service(QoS)support for different TC.Recently,a new contentionbased enhanced distributed channel access(EDCA)scheme is proposed which provides a probabilistic QoS support.In this paper,an improved EDCA scheme for service differentiation in ad hoe networks is proposed.In this scheme,signal channel resistance coefficient is used to adjust the contention window(CW).It proves that the scheme provides the traffic differentiation,high throughput and low delay through simulation. |
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| Keywords: | ad hoc networks medium access control distributed coordination function enhanced distributed channel access contention window |
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