Performance Evaluation of Flows with Diverse Traffic and Transmission Rates in IEEE 802.11 WLAN
- 1 State Key Laboratory of Integrated Service Networks, Xidian University, Xi’an, China
- 2 State Key Laboratory of Integrated Service Networks, Xidian University, Xi’an, China
- 3 State Key Laboratory of Integrated Service Networks, Xidian University, Xi’an, China
- 4 State Key Laboratory of Integrated Service Networks, Xidian University, Xi’an, China
Abstract
IEEE 802.11 WLAN cannot guarantee the QoS of applications, thus admission control has been proposed as an essen-tial solution to enhance the QoS. Packet delay and throughput are commonly employed as assessment criterions to determine whether a new connection can be admitted into the WLAN. Considering the real network condition, the analytical model is presented in this paper, which is aimed to evaluate the packet delay and throughput performance of IEEE 802.11 WLAN in nonsaturated conditions, taking into account diverse transmission rates and diverse traffic flows (i.e. flows with different packet sizes and arrival rates) simultaneously. This model is based on Markov chain and the theoretical predictions are verified by simulation in OPNET 14.5. We also analyze the influences of transmission rate diversity and traffic flow diversity on throughput performance. It is observed that, the presence of even one station with lower transmission rate can cause a considerable degradation in throughput performance of all the stations when they have the same packet size and arrival rate. Higher system throughput can be achieved if lower transmission rate stations transmit packets with smaller size or arrival rate.
- IEEE 802.11e WG, “Wireless LAN Medium Access Control (MAC) and Physical Layer (PHY) Specifications: Medium Access Control (MAC) Enhancements for Quality of Service (QoS),” IEEE std 802.11e-draft ed, 2005.
- J. Villalón, P. Cuenca and L. Orozco-Barbosa, “On the Capabilities of IEEE 802.11e for Multimedia Communications over Heterogeneous 802.11/802.11e WLANs,” Springer Science, Vol. 36, 2007, pp. 27-38.
- L. Lin, H. Fu and W. Jia, “An Efficient Admission Control for IEEE 802.11 Networks Based on throughput Analyses of (Un) Saturated Chan-nel,” IEEE GLOBECOM, 2005, pp. 3017-3021.
- A. Bazzi, M. Diolaiti and G. Pasolini, “Measurement Based Call Admission Control Strategies in Infrastructured IEEE 802.11 WLANs,” IEEE International Symposium on Personal, Indoor and Mobile Radio Communications, Vol. 3, 2005, pp. 2093-2098.
- A. Abdrabou and W. Zhuang, “Stochastic Delay Guarantees and Statistical Call Admission Control for IEEE 802.11 Single-Hop Ad Hoc Networks,” IEEE Transactions on Wireless Communications, Vol. 7, No. 10, 2008, pp. 3972-3981. http://dx.doi.org/10.1109/T-WC.2008.070564
- G. Bianchi, “Performance Analysis of the IEEE 802.11 Distributed Coordination Function,” IEEE Journal on Selected Areas in Communications, Vol. 18, No. 3, 2000, pp. 535-547. http://dx.doi.org/10.1109/49.840210
- M. Ergen and P. Varaiya, “Throughput Analysis and Admission Control for IEEE 802.11a,” Mobile Networks and Applications, Vol. 10, No. 5, 2005, pp. 705-716. http://dx.doi.org/10.1007/s11036-005-3364-9
- G.-S. Ahn, A. T. Campbell, A. Veres and L.-H. Sun, “Supporting Service Differentiation for Real-Time and Best-Effort Traffic in Stateless Wireless Ad Hoc Networks (SWAN),” IEEE Transaction on Mobile Computing, Vol. 1, No. 3, 2002, pp. 192-207. http://dx.doi.org/10.1109/TMC.2002.1081755
- D. Malone, K. Duffy and D. Leith, “Modeling the 802.11 Distributed Coordination Function in Nonsaturated Heterogeneous Conditions,” IEEE/ACM Transactions on Networking, Vol. 15, No. 1, 2007, pp. 159-172. http://dx.doi.org/10.1109/TNET.2006.890136
- Y. Xu and C. Xu, “On Traffic Flow Diversity over IEEE 802.11 Ad Hoc Networks,” IEEE International Conference on Wireless Communications, Networking and Mobile Computing, 2011, pp. 1-4.
- M. Ergen and P. Va-raiya, “Formulation of Distributed Coordination Function of IEEE 802.11 for Asynchronous Networks Mixed Data Rate and Packet Size,” IEEE Transaction on Vehicular Technology, Vol. 57, 2008, pp. 436-447. http://dx.doi.org/10.1109/TVT.2007.901887