A New Adaptive EDCA Approach to QoS of Wireless Communications
Huibin Wang, Yang Hu, Lili Zhang, Wei Xia
DOI: 10.4236/wet.2010.11001   PDF    HTML     5,454 Downloads   9,848 Views   Citations


Under the background of intelligent transportation application, QoS for various services is different in wireless com-munication. Based on the MAC layer protocol, this paper analyzes the QoS in IEEE 802.11 MAC protocol framework, and proposes a new design of a Differentiation Enhanced Adaptive EDCA (enhanced distribution channel access) approach. The proposed approach adjusts the window zooming dynamically according to the collision rate in sending data frames, makes random offset, and further distinguishes the competition parameters of the data frames that have the same priority, so as to reduce the conflict among the data frames, and improve the channel utilization. Experiments with different service cases were conducted. The simulation results show that: comparing with the conventional EDCA method, the proposed approach can ensure that high priority services are sent with priority, and the overall QoS is highly improved.

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Wang, H. , Hu, Y. , Zhang, L. and Xia, W. (2010) A New Adaptive EDCA Approach to QoS of Wireless Communications. Wireless Engineering and Technology, 1, 1-9. doi: 10.4236/wet.2010.11001.

Conflicts of Interest

The authors declare no conflicts of interest.


[1] T. Yashiro, T. Kondo, H. Yagome, M. Higuchi and Y. Matsushita, “A Network Based on Inter-Vehicle Com-munication,” Proceedings of Intelligent Vehicles Sympo-sium, 14-16 July 1993, pp. 345-350.
[2] H. Fujii, O. Hayashi, and N. Nakagata, “Experimental Research on Inter-Vehicle Communication Using Infrared Rays,” Proceedings of IEEE Intelligent Vehicles Sympo-sium, Tokyo, 19-20 September 1996, pp. 266-271.
[3] IEEE P802.11pTM/D6.0 Draft Standard for Information Technology Telecommunications and information ex-change between Systems Local and metropolitan area networks-Specific requirements, Part 11: Wireless LAN Medium Access Control and Physical Layer specifications, November 2008.
[4] F. Borgonovo, A. Capone, M. Cesana and L. Fratta, “ADHOC MAC: New MAC Architecture for Ad Hoc Networks Providing Efficient and Reliable Point-to-Point and Broadcast Services,” Wireless Networks, Vol. 10, No. 4, July 2004, pp. 359-366.
[5] Y. Ko, V. Shankarkumar and N. Vaidya, “Medium Access Control Protocols Using Directional Antennas in Ad Hoc Networks,” Proceedings of IEEE INFOCOM 2000, Tel Aviv, Vol. 1, March 2000, pp. 13-21.
[6] K. Fujimura and T. Hasegawa, “A Collaborative MAC Protocol for Inter-Vehicle and Road to Vehicle Commu-nications,” Proceddings of IEEE Intelligent Transportation Systems Conference 2004, Washington, D.C., October 2004, pp. 816-822.
[7] “Standard Specification for Telecomunications and In-formation Exchange between Roadside and Vehicle Sys-tems — 5GHz Band Dedicated Short Range Communica-tions (DSRC) Medium Access Control (MAC) and Phys-ical Layer (PHY),”ASTM E2213-03, September 2003.
[8] J. Wang, S. Makfile and J. Li, “A Random Adaptive Me-thod to Adjust MAC Parameters in IEEE802.11e WLAN,” Journal of Central South University of Technology, Vol. 16, pp. 629-634, 2009.

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