TY - GEN
T1 - A link adaptation scheme for improving voice quality and overall throughput over WLANs
AU - Tüysüz, Mehmet Fatih
AU - Mantar, Haci Ali
PY - 2011
Y1 - 2011
N2 - IEEE 802.11 wireless local area networks (WLANs) support link adaptation technique (LA) which allows mobile nodes to select a proper transmission rate. Link adaptation algorithms use packet loss rate as an indication of poor channel conditions. However, most of existing link adaptation techniques cannot classify the loss as collision, congestion or channel error loss and they could mistakenly adjust the rate as if the loss was due to error prone channel. In this paper, we present a detailed classification of packet losses and propose our link adaptation scheme for delay-sensitive VoIP applications. Proposed algorithm only uses its local information and can be easily implemented without any changes on the current IEEE 802.11 standard. Simulation results show better perceived voice quality and higher overall throughput than other existing algorithms.
AB - IEEE 802.11 wireless local area networks (WLANs) support link adaptation technique (LA) which allows mobile nodes to select a proper transmission rate. Link adaptation algorithms use packet loss rate as an indication of poor channel conditions. However, most of existing link adaptation techniques cannot classify the loss as collision, congestion or channel error loss and they could mistakenly adjust the rate as if the loss was due to error prone channel. In this paper, we present a detailed classification of packet losses and propose our link adaptation scheme for delay-sensitive VoIP applications. Proposed algorithm only uses its local information and can be easily implemented without any changes on the current IEEE 802.11 standard. Simulation results show better perceived voice quality and higher overall throughput than other existing algorithms.
KW - Link adaptation (LA)
KW - Packet loss classification
KW - QoS
KW - Voice over ip (VoIP)
KW - WLANs
UR - http://www.scopus.com/inward/record.url?scp=84856446575&partnerID=8YFLogxK
U2 - 10.1109/ICIMU.2011.6122772
DO - 10.1109/ICIMU.2011.6122772
M3 - Conference contribution
AN - SCOPUS:84856446575
SN - 9781457709890
T3 - 2011 International Conference on Information Technology and Multimedia: "Ubiquitous ICT for Sustainable and Green Living", ICIM 2011
BT - 2011 International Conference on Information Technology and Multimedia
T2 - 2011 International Conference on Information Technology and Multimedia: "Ubiquitous ICT for Sustainable and Green Living", ICIM 2011
Y2 - 14 November 2011 through 16 November 2011
ER -