Trends in Applied Sciences Research1819-35792151-7908Science International10.3923/tasr.2014.275.289SarairehMohammad AL-SarairehJa`afer SarairehSaleh 6201496In this study, a novel approach is proposed. This approach is employed to improve
the Quality of Service (QoS) for IEEE 802.11 MAC protocol, by adjustment of
the Contention Window (CW) dynamically. The CW adjustment is based on Collision
Rate (CR) and Collision Rate Variation (CRV). The proposed scheme classifies
the application type into a high priority and a low priority traffic. This classification
is used for providing QoS in single-hop wireless networks. By using the proposed
approach, the average QoS for the high priority traffic is improved by 18.3
and 22.6% for the 5 and 10 connections, respectively. While the average QoS
for the low priority traffic is improved by 11.6% and 17.8 for the 5 and 10
connections, respectively. The simulations results show that, the proposed method
improves QoS in wireless network. Also, the proposed technique can be implemented
without major modifications to the original IEEE 802.11 standard.]]>Saraireh, M., R. Saatchi, S. Al-Khayatt and R. Strachan,20072795111Dogman, A., R. Saatchi and S. Al-Khayatt,201265865Muller, N.J.,2003Pages: 578Pages: 578ISO/IEC 8802-11,19991999Pattara-Atikom, W., P. Krishnamurthy and S. Banerjee,2003102634Chatzimisios, P., A.C. Boucouvalas and V. Vitsas,200518545569Li, B. and R. Battiti,20032003pp: 152161Li, B., R. Battiti and Y. Fang,20075613741387Pang, Q., S.C. Liew, J.Y.B. Lee and S.H.G. Chan,20042004pp: 37233727Gannoune, L. and S. Robert,2004min) for enhanced service differentiation in IEEE 802.11 wireless ad-hoc networks.]]>2004pp: 311317Cali, F., M. Conti and E. Gregori,20008785799Wu, H., S. Cheng, Y. Peng, K. Long and J. Ma,20022002pp: 605609Chen, Y., Q.A. Zeng and D.P. Agrawal,20032003pp: 860867Liu, Y.S. and T.H. Hsu,2005E88-B325332Song, N., B. Kwak, J. Song and L.E. Miller,2003427752778Peng, Y., H. Wu, S. Cheng and K. Long,20022002pp: 8791Chen, J. and W. Wu,20042004pp: 31963200Aad, I., Q. Ni, C. Castelluccia and T. Turletti,20022002Bianchi, G. and I. Tinnirello,20042004pp: 844852Deng, D.J., C.H. Ke, H.H. Chen and Y.M. Huang,2008751295135Bononi, L., M. Conti and E. Gregori,2004156680Balador, A., A. Movaghar, S. Jabbehdari and D. Kanellopoulos,201229202212Kwon, Y., Y. Fang and H. Latchman,20032003pp: 853862Lin, C.H., C.K. Shieh, W.S. Hwang and C.H. Ke,20082008Zhang, M., C. Gong and Y. Lu,20082008pp: 956958Barry, M., A.T. Campbell and A. Veres,20012001pp: 582590Ayyagari, A., Y. Bernet and T. Moore,20002000Chen, W.T., B.B. Jian and S.C. Lo,20022002pp: 7074Gannoune, L.,20062006pp: 3137Deng, J., P.K. Varshney and Z. Haas,20042004Upadhyay, R., P.D. Vyavahare and S. Tokekar,20132013Ghazvini, M., N. Movahedinia and K. Jamshidi,2013593103Crowder, S.,198921155162