TY - GEN
T1 - QoS provisioning in IEEE 802.11 wireless LANs
AU - Tran, Son N.H.
AU - Wonjun, Lee
PY - 2006
Y1 - 2006
N2 - The service differentiation provided in the IEEE 802.11e can only offer soft guarantees to the real-time traffic. Admission control is to provide better Quality of Service guarantees. We present the performance study of distributed admission control for IEEE 802.11e EDCF mechanism. Our observations show that using a distributed or centralized approach may not be the best solution and proper partitioning of the bandwidth is crucial in achieving better channel utilization and goodput. It has been shown that EDCF performs better at low load and has better delay characteristics, where as HCF has better jitter characteristics and works better in medium to high load conditions. We propose class-based admissibility ratio based on WFQ and priorities of the traffic classes. We also introduce the mechanism of provisional TXOP allocation using which the unused time of higher priority flows can be allocated to lower priority flows. We feel that an integrated approach adapting to the changes in the network and load of each of the access categories could perform better.
AB - The service differentiation provided in the IEEE 802.11e can only offer soft guarantees to the real-time traffic. Admission control is to provide better Quality of Service guarantees. We present the performance study of distributed admission control for IEEE 802.11e EDCF mechanism. Our observations show that using a distributed or centralized approach may not be the best solution and proper partitioning of the bandwidth is crucial in achieving better channel utilization and goodput. It has been shown that EDCF performs better at low load and has better delay characteristics, where as HCF has better jitter characteristics and works better in medium to high load conditions. We propose class-based admissibility ratio based on WFQ and priorities of the traffic classes. We also introduce the mechanism of provisional TXOP allocation using which the unused time of higher priority flows can be allocated to lower priority flows. We feel that an integrated approach adapting to the changes in the network and load of each of the access categories could perform better.
KW - Access category (AC)
KW - Distributed admission control (DAC)
KW - Enhanced distributed coordination function (EDCF)
KW - Hybrid coordination function (HCF)
KW - Transmission opportunity (TXOP)
UR - http://www.scopus.com/inward/record.url?scp=46249091334&partnerID=8YFLogxK
U2 - 10.1109/CCE.2006.350854
DO - 10.1109/CCE.2006.350854
M3 - Conference contribution
AN - SCOPUS:46249091334
SN - 1424405688
SN - 9781424405688
T3 - HUT-ICCE 2006 First International Conference on Communications and Electronics, Proceedings
SP - 23
EP - 28
BT - HUT-ICCE 2006 1st International Conference on Communications and Electronics, Proceedings
T2 - HUT-ICCE 2006 1st International Conference on Communications and Electronics
Y2 - 10 October 2006 through 11 October 2006
ER -