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The inefficiency of legacy transmission control protocol (TCP) over wired/wireless networks inspired numerous research results in recent decade. To design a congestion control protocol that can achieve strong stability, fairness, fast convergence and high-utilization in hybrid networks, we propose AcceleRate tRansmission towards Optimal Window size TCP for Wireless networks (ARROW-WTCP) by providing...
TFRC over wireless access networks has poor performance because it accounts wireless losses as congestion losses. To solve the problem, an enhanced TFRC protocol based on step ECN marking is proposed. The simulations show that, with appropriate loss differentiation and congestion notification, the new protocol achieves much higher throughput than TFRC as well as keeps reasonable friendliness to TCP...
Traditional TCP variants use packet loss as the indicator of congestion and reduce the congestion windows size, which results in degradation of TCP throughput. Subsequently, ECN is widely used to send the congestion feedback to end hosts by couple with AQM on routers. Based on the TCP fluid model under ECN mechanism, an enhancement over wired/wireless hybrid networks, WECN, is analyzed. The contribution...
In wireless LAN connected with Internet, the anomaly of wireless channel and the greedy nature of closed loop control in TCP lead to the congestion problem and significant unfair bandwidth distribution between TCP flows. In this paper, an ECN-based access point congestion control algorithm called APCC (AP congestion control) is proposed. The main properties of APCC are: (1) Using both wireless channel...
Different from wired networks, TCP over wireless networks needs to be cross-layer designed which depends on information of MAC. However, it is difficult to apply existing cross-layer design into hybrid networks. Based on researches of congestion metrics from MAC layer over wireless networks, this paper proposes an cross-layer ECN scheme that TCP sender will trigger congestion control by ECN if RTS...
Many of packet loss as a result of factors other than congestion impact the performance of TCP in wired/wirelss hybrid networks. Firstly, this paper proposes one concept of congestion probability (CP) and analyzes the correlation of CP and network state. Then a transport control protocol named as TCP-PCP is proposed, which is based on the prediction of congestion probability instead of single loss...
High-speed networks with large bandwidth-delay product present a unique environment where currently TCP may have a major challenge to its performance (e.g. throughput deterioration). A number of new TCP congestion control algorithms have been suggested to address the problems, but at one time they increase the bandwidth utilization and also bring some other limitations, such as low TCP-friendliness,...
This paper addresses the problem of the stability of congestion control for networks with large round-trip communication delays. Nearly all the existed AQM schemes neglect the impact on system behavior, such as stability, robustness and convergence, caused by large communication delay. The drastic queue oscillations in large delay networks of PI, REM and DC-AQM decrease the link utilization and introduce...
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