Modeling and analysis of stochastic systems
Modeling and analysis of stochastic systems
MediaPlayer™ versus RealPlayer™: a comparison of network turbulence
Proceedings of the 2nd ACM SIGCOMM Workshop on Internet measurment
Communication Networking: An Analytical Approach
Communication Networking: An Analytical Approach
Scalable simulation of large-scale wireless networks with bounded inaccuracies
MSWiM '04 Proceedings of the 7th ACM international symposium on Modeling, analysis and simulation of wireless and mobile systems
SIGMETRICS '05 Proceedings of the 2005 ACM SIGMETRICS international conference on Measurement and modeling of computer systems
ICDCN'06 Proceedings of the 8th international conference on Distributed Computing and Networking
Saturation throughput analysis of IEEE 802.11e enhanced distributed coordination function
IEEE Journal on Selected Areas in Communications
Performance analysis of IEEE 802.11e contention-based channel access
IEEE Journal on Selected Areas in Communications
Applications and challenges of the 802.11e EDCA mechanism: an experimental study
IEEE Network: The Magazine of Global Internetworking
Experimental evaluation of asymmetric QoS in IEEE 802.11g wireless networks
Proceedings of the 7th ACM symposium on QoS and security for wireless and mobile networks
IEEE/ACM Transactions on Networking (TON)
Hi-index | 0.00 |
We extend the modeling heuristic of (Harsha et al. 2006. In IEEE IWQoS '06, pp 178 --- 187) to evaluate the performance of an IEEE 802.11e infrastructure network carrying packet telephone calls, streaming video sessions and TCP controlled file downloads, using Enhanced Distributed Channel Access (EDCA). We identify the time boundaries of activities on the channel (called channel slot boundaries) and derive a Markov Renewal Process of the contending nodes on these epochs. This is achieved by the use of attempt probabilities of the contending nodes as those obtained from the saturation fixed point analysis of (Ramaiyan et al. 2005. In Proceedings ACM Sigmetrics, '05. Journal version accepted for publication in IEEE TON). Regenerative analysis on this MRP yields the desired steady state performance measures. We then use the MRP model to develop an effective bandwidth approach for obtaining a bound on the size of the buffer required at the video queue of the AP, such that the streaming video packet loss probability is kept to less than 1%. The results obtained match well with simulations using the network simulator, ns-2. We find that, with the default IEEE 802.11e EDCA parameters for access categories AC 1, AC 2 and AC 3, the voice call capacity decreases if even one streaming video session and one TCP file download are initiated by some wireless station. Subsequently, reducing the voice calls increases the video downlink stream throughput by 0.38 Mbps and file download capacity by 0.14 Mbps, for every voice call (for the 11 Mbps PHY). We find that a buffer size of 75KB is sufficient to ensure that the video packet loss probability at the QAP is within 1%.