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Current Internet traffic is carried mainly by the Transmission Control Protocol (TCP), and the performance of the Internet depends strongly on how well TCP works. Detecting and mitigating the congestion is one of the main tasks of this protocol, in fact, different TCP versions are defined by their congestion control algorithm. Also, Active Queue Management (AQM) algorithms share the same goal of congestion...
With Netflix and YouTube accounting for more than 50% of North American, fixed network peak download traffic in 2015, video streaming is a significant source of Internet traffic. Dynamic Adaptive Streaming over HTTP (DASH) is a recent standard for live and on-demand video streaming services, where clients adapt their behaviour on-the-fly to match regularly updated estimates of network capacity. Consumer...
Explicit Congestion Notification (ECN) lets a bottleneck's Active Queue Management (AQM) mechanism inform an endpoint about congestion without having to drop a packet. A recently proposed sender-side modification called Alternative Backoff with ECN (ABE) enables reduced latency while maintaining good utilization with ECN. However, under certain circumstances ABE can produce a degree of unfair behavior...
Network congestion is an important problem for Internet, and active queue management (AQM) is an effective congestion control technique. However, because the system states in real networks cannot be obtained directly, the traditional congestion control methods based on the AQM cannot obtain the state-feedback control law. Based on the modeling of the system, this paper presents an optimal congestion...
Queue management is an important part to provide better service of buffer at the Internet router. Active Queue Management (AQM) technique is used to improve the network performance like link utilization, delay, fairness and packet loss rate. In this paper we explore the impact of buffer size and round trip time (RTT) on AQM router where TCP Reno is used as transport protocol in single bottleneck dumbbell...
Internet is the major source of information today and its usage is increasing at an alarming rate. A wide variety of data travels over the Internet to cater the needs of end users. This has eventually led to heavy congestion in the network which in turn, worsens the user perceived latency. Internet routers are the main agents that detect congestion prior to end hosts. Traditional router incorporates...
After 90's, the Internet has developed fast. Many new applications and businesses based on IP Protocol appear. With the network traffic increasing, network congestion has become the bottleneck that restricts the applications and development of network. In this paper, the congestion control policy based on router -- AQM and RED algorithm is proposed first. Then we build simulation environment to simulate...
Nowadays, due to excessive queuing, delays on the Internet can grow longer than several round trips between the Moon and the Earth — for which the “bufferbloat” term was recently coined. Some point to active queue management (AQM) as the solution. Others propose end-to-end low-priority congestion control techniques (LPCC). Under both approaches, promising advances have been made in recent times: notable...
Classical network fluid model and RED algorithm are based on TCP flows in internet network, and they have not considered the UDP flows' effects in network. However, in real work of the network, the network link capacity is shared by the hybrid traffics: TCP flows and UDP flows, and UDP flows can occupy the original link capacity of TCP flow. Since there is no feedback control for UDP flows, the classical...
Active queue management (AQM) plays a significant role in network congestion. A new adaptive PID controller for AQM is presented to overcome the shortcomings of PID AQM such as parameters cannot be adjusted with time, cannot be adapted to the dynamic and nonlinear network. The new algorithm integrates PID control law and neural network, which not only has the merits of both but also overcomes the...
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