%0 Journal Article %1 harsha2010analytical %A Harsha, Sri %A Kumar, Anurag %A Sharma, Vinod %D 2010 %J Wireless Networks %K 80211e edca evaluation model multimedia performance qos wlan %N 2 %P 367--385 %T An analytical model for performance evaluation of multimedia applications over EDCA in an IEEE 802.11e WLAN %U http://dx.doi.org/10.1007/s11276-008-0137-y %V 16 %X Abstract  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 boundariesof activities on the channel (called channel slot boundaries) and derive a Markov Renewal Process of the contending nodeson these epochs. This is achieved by the use of attempt probabilities of the contending nodes as those obtained from the saturationfixed 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 stateperformance measures. We then use the MRP model to develop an effective bandwidth approach for obtaining a bound on the sizeof the buffer required at the video queue of the AP, such that the streaming video packet loss probability is kept to lessthan 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 callcapacity 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 packetloss probability at the QAP is within 1%.

@article{harsha2010analytical, abstract = {Abstract  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 boundariesof activities on the channel (called channel slot boundaries) and derive a Markov Renewal Process of the contending nodeson these epochs. This is achieved by the use of attempt probabilities of the contending nodes as those obtained from the saturationfixed 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 stateperformance measures. We then use the MRP model to develop an effective bandwidth approach for obtaining a bound on the sizeof the buffer required at the video queue of the AP, such that the streaming video packet loss probability is kept to lessthan 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 callcapacity 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 packetloss probability at the QAP is within 1%.}, added-at = {2010-04-30T03:20:44.000+0200}, author = {Harsha, Sri and Kumar, Anurag and Sharma, Vinod}, biburl = {https://www.bibsonomy.org/bibtex/239b30b33ea5c380696ceca032144e86d/leomir}, description = {SpringerLink - Journal Article}, interhash = {aca5d2d4de9c47627651883f504d1c6d}, intrahash = {39b30b33ea5c380696ceca032144e86d}, journal = {Wireless Networks}, keywords = {80211e edca evaluation model multimedia performance qos wlan}, month = {#feb#}, number = 2, pages = {367--385}, timestamp = {2010-04-30T03:20:44.000+0200}, title = {An analytical model for performance evaluation of multimedia applications over EDCA in an IEEE 802.11e WLAN}, url = {http://dx.doi.org/10.1007/s11276-008-0137-y}, volume = 16, year = 2010 }