Towards improving internet performance

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Recent work by the applicant has been concerned with dealing with some of the performance and QoS (quality of service) issues which exist in current Internet, particularly for inelastic applications that are sensitive to delay and packet loss. The current Internet was originally designed to support flat, elastic, applications which are relatively insensitive to delay and where packet losses could be handled by retransmissions. Modern applications, such as video streaming and collaborative work require timely delivery and a QoS assurance level. Long propagation delays, by itself, makes retransmission infeasible in many cases and forwarding delays due to congestion and poor routing compound the problem Furthermore, services on the current Internet are network centric, whereas modern needs are more user/application centric. Thus, in recent years the applicant has done work on web caching, load sensitive dynamic routing, multicasting, discard policies for QoS maintenance in transport of MPEG streams, routing improvement in DHT-based P2P networks, simulation tools for large scale networks, route failure recovery for reserved routing.