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 QoS support for different traffic categories. Recently, a new contention-based enhanced distributed channel access (EDCA) scheme was proposed which provides a probabilistic QoS support. In this paper, an adaptive EDCA scheme with QoS guarantee for mobile ad hoc networks (MANETs) is proposed. In this scheme, the EDCA scheme and the token bucket algorithm (TBA) are combined to adjust the contention window (CW). Our scheme provides the traffic differentiation.
References
[1]
IEEE Std, “802.11-1999, Part 11: Wireless LAN Medium Access Control (MAC) and Physical Layer (PHY) Specifications,” Reference number ISO/IEC 8802-11:1999(E), IEEE Std. 802.11, 1999 Edition.
[2]
P. V. Krishna and Iyengar, “Sequencing technique: An enhancement to 802.11 medium access control to improve the performance of wireless networks,” N.Ch.S.N., International Journal Communication Networks and Distributed Systems, Vol. 1, No. 1, pp. 52–70, 2008.
[3]
E. Carlson, C. Prehofer, C. Bettstetter, et al, “A distributed end-to-end reservation protocol for IEEE 802.11- based wireless mesh networks,” IEEE Journal on Selected Areas in Communications, Vol. 24, No. 11, November 2006, pp. 2018–2027.
[4]
B. Zhao and Y. B. Hua, “A distributed medium access control scheme for a large network of wireless routers,” IEEE Transactions on Wireless Communications, Vol. 7, No. 5, pp. 1614–1622, May 2008.
[5]
A. A. Syed, W. Ye, and J. Heidemann, “T-Lohi: A new class of MAC protocols for underwater acoustic sensor networks,” IEEE INFOCOM’08, The 27th Conference on Computer Communications, pp. 231–235, 13-18 April 2008.
[6]
A. Banchs and X. Perez, “Providing throughput guarantees in IEEE 802.11 wireless LAN,” Wireless Communications and Networking Conference, IEEE WCNC’02, Vol. 1, pp. 130–138, 17-21 March 2002.
[7]
S. Sehrawat, R. P. Bora, and D. Harihar, “Performance analysis of QoS supported by enhanced distributed channel access (EDCA) mechanism in IEEE 802.11e,” IAENG International Journal of Computer Science, IJCS_33_1_6, Vol. 33, No. 1, February 2007.
[8]
J. R. Yan, S. Y. Zhang, H. Long, and Y. F. Sun, “An analytical model for EDCA mechanism,” Journal of Elec-tronics & Information Technology, Vol. 30, No. 4, April 2008.
[9]
X. Y. Zhou, H. F. W, L. M. Sun, et al., “MAC access delay analysis of EDCA mechanism of wireless LANs,” Journal of Software, Vol. 19, No. 8, pp. 2127?2139, 2008. http://www.jos.org.cn/1000-9825/19/2127.htm.
[10]
F. Keceli, I. Inan, and E. Ayanoglu, “Weighted fair up-link/downlink access provisioning in IEEE 802.11e WLANs,” ICC’08, IEEE International Conference on Communications, pp. 2473?2479, 19-23 May 2008.
[11]
S. H. Choi, J. del Prado, N. S. Shankar, et al., “IEEE 802.11 e contention-based channel access (EDCF) per-formance evaluation,” ICC’03, IEEE International Con-ference on Communications, pp. 1151?1156, 11-14 May 2003.
[12]
L. Romdhani, Q. Ni, T. Turletti, “Adaptive EDCF: En-hanced service differentiation for IEEE 802.11 wireless ad-hoc networks,” IEEE Wireless Communications and Networking, Conference, Vol. 2, pp. 16?20, March 2003.
