Pre-Congestion Notification marking

B. Briscoe, P Eardley (Editor), D. Songhurst, F. Le Faucheur, A. Charny, V. Liatsos, J. Babiarz, K. Chan (Editor), S. Dudley (Editor), G. Karagiannis (Editor), A. Bader, L. Westberg

    Research output: Book/ReportReportProfessional

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    Pre-Congestion Notification (PCN) builds on the concepts of RFC 3168, "The addition of Explicit Congestion Notification to IP". However, Pre-Congestion Notification aims at providing notification before any congestion actually occurs. Pre-Congestion Notification is applied to real-time flows (such as voice, video and multimedia streaming) in DiffServ networks. As described in [CL-DEPLOY], it enables "pre" congestion control through two procedures, flow admission control and flow pre-emption. The draft proposes algorithms that determine when a PCN-enabled router writes Admission Marking and Pre-emption Marking in a packet header, depending on the traffic level. The draft also proposes how to encode these markings. We present simulation results with PCN working in an edge-to-edge scenario using the marking algorithms described. Other marking algorithms will be investigated in the future.
    Original languageEnglish
    PublisherInternet Engineering Task Force (IETF)
    Number of pages63
    Publication statusPublished - 20 Oct 2006


    • IR-66548
    • METIS-238705
    • CR-C.2
    • EWI-7735


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