TY - GEN
T1 - Improving performance of router-assisted transport protocols over variable capacity links
AU - Qazi, Ihsan Ayyub
AU - Znati, Taieb
AU - Mosse, Daniel
PY - 2012
Y1 - 2012
N2 - Many promising congestion control protocols use explicit feedback from the network to achieve high performance. These protocols often use congestion signals whose computation requires an estimate of link capacity. Such estimates are not available in networks where capacity varies over time. This paper studies the impact of inaccurate capacity estimates on the performance of congestion control protocols over variable capacity links. As a case study, we focus on 802.11 WLANs. We show that such estimates can lead to either under-utilization or unfairness and network overload. Using a model, we characterize the available capacity of a node in a 802.11 WLAN and then study a method for capacity estimation. Using simulations, we show that the method leads to high utilization and fairness over shared, multi-access networks.
AB - Many promising congestion control protocols use explicit feedback from the network to achieve high performance. These protocols often use congestion signals whose computation requires an estimate of link capacity. Such estimates are not available in networks where capacity varies over time. This paper studies the impact of inaccurate capacity estimates on the performance of congestion control protocols over variable capacity links. As a case study, we focus on 802.11 WLANs. We show that such estimates can lead to either under-utilization or unfairness and network overload. Using a model, we characterize the available capacity of a node in a 802.11 WLAN and then study a method for capacity estimation. Using simulations, we show that the method leads to high utilization and fairness over shared, multi-access networks.
UR - http://www.scopus.com/inward/record.url?scp=84871947023&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84871947023&partnerID=8YFLogxK
U2 - 10.1109/ICC.2012.6363981
DO - 10.1109/ICC.2012.6363981
M3 - Conference contribution
AN - SCOPUS:84871947023
SN - 9781457720529
T3 - IEEE International Conference on Communications
SP - 1271
EP - 1275
BT - 2012 IEEE International Conference on Communications, ICC 2012
T2 - 2012 IEEE International Conference on Communications, ICC 2012
Y2 - 10 June 2012 through 15 June 2012
ER -