An ECN probe-based connection acceptance control

  • Authors:
  • Tom Kelly

  • Affiliations:
  • Cambridge University, Cambridge, CB2 1PZ, United Kingdom

  • Venue:
  • ACM SIGCOMM Computer Communication Review
  • Year:
  • 2001

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Abstract

Connection acceptance control is a mechanism which can be used to moderate the load placed on a network by turning away connection requests during times of overload. Traditionally these mechanisms have been implemented by setting up state within a network using signalling protocols, such as the IETF's Resource Reservation Protocol. There have been recent proposals for admission control based on end-systems probing the network to infer network load. These distributed algorithms often have less router state and hence scale more easily. This paper discusses an ECN (Explicit Congestion Notification) probe-based admission control protocol that is fast, scalable and robust. The protocol's performance is then studied through simulation. It is concluded that probe-based admission control is viable in both partitioned and integrated networks, but more research is needed to understand the implications for network policy control.