TY - GEN
T1 - Capacity analysis of supporting VoIP in IEEE 802.11e EDCA WLANs
AU - Gao, Deyun
AU - Cai, Jianfei
AU - Chen, Chang Wen
PY - 2006
Y1 - 2006
N2 - Directly implementing voice over Internet protocol (VoIP) over infrastructure wireless local area networks (WLANs) will have the bottleneck problem in the access point (AP). In this paper, we propose to use the service differentiation provided by the new IEEE 802.11e standard to solve the bottleneck problem and improve the voice capacity. In particular, we propose to allocate higher priority access category (AC) to the AP while allocating lower priority AC to mobile stations. We develop a simple Markov chain model, which considers not only the important enhanced distributed channel access (EDCA) parameters but also the channel errors. Based on the developed analytical model, we analyze the performance of VoIP over EDCA. Through appropriately selecting the EDCA parameters, we are able to differentiate the services for the downlink and the uplink. The experimental results are very promising: with the adjustment of only one EDCA parameter, we improve the VoIP capacity by 20-30%.
AB - Directly implementing voice over Internet protocol (VoIP) over infrastructure wireless local area networks (WLANs) will have the bottleneck problem in the access point (AP). In this paper, we propose to use the service differentiation provided by the new IEEE 802.11e standard to solve the bottleneck problem and improve the voice capacity. In particular, we propose to allocate higher priority access category (AC) to the AP while allocating lower priority AC to mobile stations. We develop a simple Markov chain model, which considers not only the important enhanced distributed channel access (EDCA) parameters but also the channel errors. Based on the developed analytical model, we analyze the performance of VoIP over EDCA. Through appropriately selecting the EDCA parameters, we are able to differentiate the services for the downlink and the uplink. The experimental results are very promising: with the adjustment of only one EDCA parameter, we improve the VoIP capacity by 20-30%.
UR - https://www.scopus.com/pages/publications/50949101750
U2 - 10.1109/GLOCOM.2006.726
DO - 10.1109/GLOCOM.2006.726
M3 - Conference contribution
AN - SCOPUS:50949101750
SN - 142440357X
SN - 9781424403578
T3 - GLOBECOM - IEEE Global Telecommunications Conference
BT - IEEE GLOBECOM 2006 - 2006 Global Telecommunications Conference
T2 - IEEE GLOBECOM 2006 - 2006 Global Telecommunications Conference
Y2 - 27 November 2006 through 1 December 2006
ER -