DocumentCode :
2126932
Title :
A cross-layer analysis for evaluating the voice conversation performance over wireless LANs
Author :
Komatsu, Mayumi ; Shioda, Shigeo
Author_Institution :
Grad. Sch. of Eng., Chiba Univ., Chiba, Japan
fYear :
2009
fDate :
13-16 Sept. 2009
Firstpage :
1168
Lastpage :
1172
Abstract :
In this article, we present a mathematical model for evaluating the throughput of IEEE 802.11 MAC layer as well as the network-layer performance such as queueing delay or packet loss at each station. Our proposal combines a Markov chain model for evaluating the throughput of the IEEE 802.11 DCF and a queueing model for analyzing the network-layer performance of each station. Through extensive simulations using the simulator ns2, we show that our model can accurately predict how many voice conversations can be multiplexed over a WLAN without loss of any packets. Our model allows us to evaluate the IEEE 802.11 DCF with contention window (CW) differentiation, which is a service differentiation scheme provided by EDCA. In this article, we also investigate how much the CW differentiation could improve the bandwidth utilization by making contention window of the access point smaller than wireless stations.
Keywords :
Markov processes; access protocols; voice communication; wireless LAN; EDCA; IEEE 802.11 MAC layer; Markov chain model; bandwidth utilization; contention window; cross-layer analysis; network-layer performance; queueing delay; queueing model; service differentiation scheme; voice conversation evaluation; wireless LAN; Bandwidth; Mathematical model; Performance analysis; Performance loss; Predictive models; Proposals; Queueing analysis; Speech analysis; Throughput; Wireless LAN;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Personal, Indoor and Mobile Radio Communications, 2009 IEEE 20th International Symposium on
Conference_Location :
Tokyo
Print_ISBN :
978-1-4244-5122-7
Electronic_ISBN :
978-1-4244-5123-4
Type :
conf
DOI :
10.1109/PIMRC.2009.5449847
Filename :
5449847
Link To Document :
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