%% You should probably cite draft-ietf-pcn-3-in-1-encoding instead of this I-D.
@techreport{briscoe-pcn-3-in-1-encoding-00,
    number =    {draft-briscoe-pcn-3-in-1-encoding-00},
    type =      {Internet-Draft},
    institution =   {Internet Engineering Task Force},
    publisher = {Internet Engineering Task Force},
    note =      {Work in Progress},
    url =       {https://datatracker.ietf.org/doc/draft-briscoe-pcn-3-in-1-encoding/00/},
    author =    {Bob Briscoe},
    title =     {{PCN 3-State Encoding Extension in a single DSCP}},
    pagetotal = 8,
    year =      2008,
    month =     oct,
    day =       27,
    abstract =  {Pre-congestion notification (PCN) is a mechanism designed to protect the quality of service of inelastic flows. It does this by marking packets when traffic load on a link is approaching or has exceeded a threshold below the physical link rate. This document specifies an extension to the two-state PCN baseline encoding that enables three encoding states to be carried in the IP header without using more than one Diffserv codepoint. It presupposes a standards action has removed the limit of two encoding states in current tunnelling mechanisms.},
}