An efficient quality-of-service MAC protocol for infrastructure WLANs

Authors:
Shih-Lin Wu;Sui Fan-Jiang;Zi-Tsan Chou
Affiliations:
Department of Computer Science and Information Engineering, Chang Gung University, Kwei-Shan, Tao-Yuan, Taiwan, ROC;Department of Computer Science and Information Engineering, Chang Gung University, Kwei-Shan, Tao-Yuan, Taiwan, ROC;Institute for Information Industry, Taipei, Taiwan, ROC
Venue:
Journal of Network and Computer Applications
Year:
2006

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Abstract

In this paper, we propose a new efficient MAC protocol, named quality-of-service MAC (QMAC), which is an integrated solution for providing QoS guarantees to real-time multimedia applications in infrastructure WLANs. In addition, QMAC has the following attractive features: (i) its reservation scheme ensures that real-time stations enter the polling list in bounded time, (ii) it supports multiple priority levels and guarantees that high-priority stations always join the polling list earlier than low-priority stations, (iii) it employs the distributed pre-check technique such that the access point can admit as many newly flows as possible, while not violating admitted flows' guarantees, (iv) its dynamic bandwidth allocation scheme provides real-time traffic transmission with per-flow probabilistic bandwidth assurances, and (v) it uses a multipoll frame to poll all stations on the polling list at a time, therefore, the bandwidth can be utilized more efficient. Through simulations, we demonstrate the advantage of our QMAC.