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Virtual connections in packet switched networks is increasing faster, in particular over the Internet, using MPLS and GMPLS evolution has produced a significant amount of studies on traffic engineering protocols, especially with regard to the different ways to provide quality of service over connections. This article presents a model to characterize the reliability of these types of networks, in computing...
The master-slave synchronization problem for two cart-pendulum systems when both measurement and control signals are transmitted via intranet communication channel is examined. The speed-gradient method for exciting master system and linear state feedback for slave system is used. Theoretical analysis is performed by the nonlinear extension of Fridman's method. Experimental results are presented for...
Delay tolerant networks generally use the epidemic routing protocol, because stable routing paths can hardly be maintained. However, the epidemic scheme leads to much network overheads because the messages are delivered to all the devices. In this paper, we propose an efficient protocol based on the human mobility patterns. In the proposed protocol, a message is delivered to several devices that are...
Queuing is a common phenomenon in theme parks which negatively affects visitor experience and revenue yields. There is thus a need for park operators to infer the real queuing delays without expensive investment in human effort or complex tracking infrastructure. In this paper, we depart from the classical queuing theory approach and provide a data-driven and online approach for estimating the time-varying...
An Internet traffic trace over gigabit Ethernet contains information on arrival time and size of every packet over the collection period. An important problem is to model the latency and packet losses within the trace. The Lindley equation is a general form of describing the evolution of queueing delay processes and queue length processes, both of which are tightly associated with the latency and...
Low Extra Delay Background Transport (LEDBAT) congestion control algorithm is designed to address the unfairness problem of TCP aggravated by applications that use multiple TCP connections for data transfer. LEDBAT operates under the assumption that the queue delay at the access router of the bottleneck link will be the primary varying contributor to end-to-end one-way delay. However this assumption...
End-to-end QoS is a challenge for future Internet. A per flow resource reservation can be carried out among heterogeneous domains on the communication path using signaling protocols. When one or both communicating terminals are mobile there is additional complexity. Signaling delays and resource lacking on future paths can dramatically impact user experience. In this paper, a rational future path...
Loss based TCP congestion control has been shown to not perform well in environments were there is non-congestion related packet losses. Delay based TCP congestion control algorithms provide a low latency connection with no congestion related packet losses, and have the potential for being tolerant to non-congestion related losses. Unfortunately, delay based TCP does not compete well with loss based...
There has been a constant barrage of worms over the internet during the recent past. To develop appropriate tools for thwarting quick spread of worms, researchers are trying to understand the behavior of the worm propagation with the aid of epidemiological models. In this study, an improved SIR epidemic model with dynamic input-output and time delay property is proposed. Whereas in the SIR model once...
This paper describes a bilateral control of nonlinear teleoperation with time varying communication delay. The proposed method are simple PD-type controllers which are independent of the rate of time delay change and depend on the upper bound of round-trip delay. The proposed control strategy is independent of parameter uncertainties of the model of the robots and the operator and remote environment...
The message dropout will degrade the control performance in the Internet-based telecontrol system. The switched controller is proposed to compensate the network delay and message dropout. It changes among the different structures by inspecting the sampling cases in the forward and feedback paths. The theory analysis shows that the stability and steady-state error will be maintained, but the transient...
This paper studies window flow control focusing on bridging the gap between microscopic factors such as burstiness in sub-RTT timescales, and observable macroscopic properties such as steady state bandwidth sharing and flow level stability. Using new models, we analytically capture notable effects of microscopic behavior on macroscopic quantities. For loss-based protocols, we calculate the loss synchronization...
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