Crimson - Traffic Aware Active Queue Management
                    Mark Claypool
                        WPI

  ABSTRACT:

  Internet routers increasingly carry traffic for applications with a
  wide range of delay and loss requirements and traffic that has a
  wide range of data rates and connection times.  The diversity of
  traffic poses challenges for managing congestion since not all
  packet drops, the primary indicators of congestion, have an equal
  impact on overall performance and on the Quality of Service (QoS) of
  individual applications.  Unfortunately, current Active Queue
  Management (AQM) techniques, which attempt to improve the
  performance over current Internet drop-tail routers, are not able to
  provide applications with a choice in QoS nor are they able to
  assess the impact on QoS or performance from the packets they drop.
  As a proposed solution, we have set forth the Crimson architecture
  in which end-hosts provide additional information called source
  hints inside each packet sent.  Using these source hints, core
  routers can make informed decisions about the effects on QoS and
  performance of packet drops without the overhead of keeping per-flow
  state.  Edge-routers, which typically can keep some per-flow state,
  monitor the source hints to prevent misbehaving hosts from obtaining
  an unfair performance advantage by using false hints.  Simulations
  over a range of traffic conditions show Crimson provides a higher
  QoS than current AQM approaches for both traditional and interactive
  flows.  In addition, Crimson protects short-lived flows from
  unnecessary timeouts, improving the response time characteristics
  for Web traffic during congestion, while not degrading overall
  network performance.

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Bio:

  Mark Claypool received his Ph.D. from the University of Minnesota in
  1997.  He is currently an Assistant Professor in the Computer
  Science Department of Worcester Polytechnic Institute.  His research
  interestes include Multimedia Networking, Congestion Control and
  Information Filtering.  In his spare time, Mark plays with his
  computers, his dog and his kids (not necessarily in that order).