TY - GEN
T1 - Experimental investigation on VoIP performance and the resource utilization in 802.11b WLANs
AU - Narbutt, Miroslaw
AU - Davis, Mark
PY - 2006
Y1 - 2006
N2 - In a shared medium network like the 802.11b WLAN, predicting the quality of VoIP calls from the resource usage of the wireless medium is highly desirable. Analyzing the bandwidth usage at the L2/MAC layer may be especially useful for potential QoS provisioning and call admission schemes. This paper experimentally investigates the relationship between resource utilization in WLANs and the quality of VoIP calls transmitted over wireless medium. Specifically we evaluate how the amount of free bandwidth influences transmission impairments (i.e. delay, loss, and jitter) and thus call quality. Resource utilization (under the MAC bandwidth components framework) is calculated by a WLAN resource monitoring application that passively "sniffs" packets at the L2/MAC layer and analyses their headers and temporal characteristics. The quality of VoIP calls is predicted using an extended version of the ITU-T Emodel, which estimates user satisfaction from time varying transmission impairments.
AB - In a shared medium network like the 802.11b WLAN, predicting the quality of VoIP calls from the resource usage of the wireless medium is highly desirable. Analyzing the bandwidth usage at the L2/MAC layer may be especially useful for potential QoS provisioning and call admission schemes. This paper experimentally investigates the relationship between resource utilization in WLANs and the quality of VoIP calls transmitted over wireless medium. Specifically we evaluate how the amount of free bandwidth influences transmission impairments (i.e. delay, loss, and jitter) and thus call quality. Resource utilization (under the MAC bandwidth components framework) is calculated by a WLAN resource monitoring application that passively "sniffs" packets at the L2/MAC layer and analyses their headers and temporal characteristics. The quality of VoIP calls is predicted using an extended version of the ITU-T Emodel, which estimates user satisfaction from time varying transmission impairments.
UR - https://www.scopus.com/pages/publications/46149114393
U2 - 10.1109/LCN.2006.322126
DO - 10.1109/LCN.2006.322126
M3 - Conference contribution
AN - SCOPUS:46149114393
SN - 1424404185
SN - 9781424404186
T3 - Proceedings - Conference on Local Computer Networks, LCN
SP - 397
EP - 403
BT - Proceedings - The 31st IEEE Conference on Local Computer Networks, LCN 2006
T2 - 31st Annual IEEE Conference on Local Computer Networks, LCN 2006
Y2 - 14 November 2006 through 16 November 2006
ER -