Predictive Loss Pattern Queue Management for Internet Routers

摘要

Widespread availability of real-time services is the next challenge for the Internet after the introduction of the WWW has already changed Internet traffic patterns once. As the Internet provides a "best effort" datagram service only, no assurance for actual packet delivery for real-time flows can be given. Most real-time applications exhibit tolerance against occasional loss of packets, but are sensitive to losses that occur in bursts. This is especially significant for a voice service, which we consider as our primary target application in this paper due to its importance i nthe future Internet, its relatively well-known subjective properties in the presence of packet loss and its simple flow structure. Currently all hop-by-hop approaches to enhance the Quality-of-Service for real-time flows either use strict per-flow setup and state maintenance of reservations (Integrated Services) or rely on the sender/ingress router which is unaware of the amount and the location of congestion in the network to mark packets for preferred treatment (Differentiated Services).