K. Ramakrishnan

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Widespread use of computer networks and the use of varied technology for the interconnection of computers has made congestion a signi cant problem. In this report, we summarize our research on congestion avoidance. We compare the concept of congestion avoidance with that of congestion control. Brie y, congestion control is a recovery mechanism, while(More)
In this paper, we consider the problem of delay-dependent stability of a class of discrete-time Lur'e systems with time-varying state-delay, and sector-bounded nonlinearity using Lyapunov approach. By exploiting a candidate Lyapunov functional, and using slack matrix variables in the delay-dependent stability analysis, less conservative absolute and robust(More)
Bacterial type IV pili are essential for adhesion to surfaces, motility, microcolony formation, and horizontal gene transfer in many bacterial species. These polymers are strong molecular motors that can retract at two different speeds. In the human pathogen Neisseria gonorrhoeae speed switching of single pili from 2 µm/s to 1 µm/s can be triggered by(More)
In this work, we present our experiences of managing the deployment of a wireless mesh network to support real-time voice services in a village near Mumbai, India. We focus on three essential aspects of our deployment: (1) in-network mechanisms for ease of network planning, (2) network management and data collection in an operational network, and (3)(More)
Congestion is said to occur in the network when the resource demands exceed the capacity and packets are lost due to too much queuing in the network. During congestion, the network throughput may drop to zero and the path delay may become very high. A congestion control scheme helps the network to recover from the congestion state. A congestion avoidance(More)