Performance evaluation of packet loss differentiation algorithms for wireless networks
Proceedings of the 2nd ACM workshop on Performance monitoring and measurement of heterogeneous wireless and wired networks
Performance analysis of the TXOP scheme in IEEE 802.11e WLANs with bursty error channels
WCNC'09 Proceedings of the 2009 IEEE conference on Wireless Communications & Networking Conference
GIIS'09 Proceedings of the Second international conference on Global Information Infrastructure Symposium
GLOBECOM'09 Proceedings of the 28th IEEE conference on Global telecommunications
IEEE Journal on Selected Areas in Communications
QoS analysis of medium access control in LR-WPANs under bursty error channels
Future Generation Computer Systems
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In IEEE 802.11 WLANs, packet losses may be due to buffer overflow, transmission errors, or collisions. Therefore, the performance of TCP-Friendly Rate Control (TFRC) in IEEE 802.11 WLANs largely depends on its ability to differentiate packet losses resulting from network congestion (due to buffer overflow and collisions) and those from transmission errors. In this paper, an enhanced TFRC (E-TFRC) protocol is proposed to detect and identify the cause of packet loss events through a novel two-phase loss differentiation algorithm (TP-LDA). The packet losses due to buffer overflow and those due to failed transmissions in WLANs are first differentiated. For failed transmissions, the fraction of those due to collisions is obtained with the assistance of the lower layer. By employing TP-LDA, only the packet losses due to buffer overflow and collisions are notified to the sender for appropriate flow and congestion control. To quantify the performance of TFRC and E-TFRC over WLANs, a continuous-time Markov chain based on a new WLAN link model is developed by considering both collisions and transmission errors. Analytical and simulation results demonstrate that, with appropriate loss differentiation, E-TFRC can achieve higher throughput than TFRC in WLANs with different channel profiles.