TY - GEN
T1 - Enhancing MAC protocol for voice over IEEE 802.11 WLANs
AU - Kim, Jong Ok
AU - Tode, Hideki
AU - Murakami, Koso
PY - 2006
Y1 - 2006
N2 - It has been reported that there occurs unfairness between downlink and uplink in 802.11 WLAN. This is mainly caused by CSMA/CA employed in DCF. The unfairness specifically has an adverse impact on bi-directional voice calls. Downlink voice connections become a primary factor to limit voice capacity. In this paper, we propose a novel medium access protocol, so called DCFmm, in order to improve QoS of downlink voice traffic as well as fairness between bi-directional voice connections. DCFmm is designed to enhance 802.11 DCF, and is fully compatible to the legacy DCF. In addition, it only requires protocol modifications of the AP. Thus, it can be easily implemented into existing 802. 11 WLANs. DCFmm is compared with two conventional techniques through computer simulations. Extensive simulation results show that the proposed DCFmm scheme can improve fairness between downlink and uplink, and consequently, support larger number of voice calls than DCF.
AB - It has been reported that there occurs unfairness between downlink and uplink in 802.11 WLAN. This is mainly caused by CSMA/CA employed in DCF. The unfairness specifically has an adverse impact on bi-directional voice calls. Downlink voice connections become a primary factor to limit voice capacity. In this paper, we propose a novel medium access protocol, so called DCFmm, in order to improve QoS of downlink voice traffic as well as fairness between bi-directional voice connections. DCFmm is designed to enhance 802.11 DCF, and is fully compatible to the legacy DCF. In addition, it only requires protocol modifications of the AP. Thus, it can be easily implemented into existing 802. 11 WLANs. DCFmm is compared with two conventional techniques through computer simulations. Extensive simulation results show that the proposed DCFmm scheme can improve fairness between downlink and uplink, and consequently, support larger number of voice calls than DCF.
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U2 - 10.1109/CCNC.2006.1592985
DO - 10.1109/CCNC.2006.1592985
M3 - Conference contribution
AN - SCOPUS:33749065345
SN - 1424400856
SN - 9781424400850
T3 - 2006 3rd IEEE Consumer Communications and Networking Conference, CCNC 2006
SP - 45
EP - 49
BT - 2006 3rd IEEE Consumer Communications and Networking Conference, CCNC 2006
T2 - 2006 3rd IEEE Consumer Communications and Networking Conference, CCNC 2006
Y2 - 8 January 2006 through 10 January 2006
ER -