%% You should probably cite rfc6627 instead of this I-D.
@techreport{ietf-pcn-encoding-comparison-08,
    number =    {draft-ietf-pcn-encoding-comparison-08},
    type =      {Internet-Draft},
    institution =   {Internet Engineering Task Force},
    publisher = {Internet Engineering Task Force},
    note =      {Work in Progress},
    url =       {https://datatracker.ietf.org/doc/draft-ietf-pcn-encoding-comparison/08/},
    author =    {Georgios Karagiannis and Kwok Ho Chan and Toby Moncaster and Michael Menth and Philip Eardley and Bob Briscoe},
    title =     {{Overview of Pre-Congestion Notification Encoding}},
    pagetotal = 18,
    year =      2012,
    month =     feb,
    day =       8,
    abstract =  {The objective of Pre-Congestion Notification (PCN) is to protect the quality of service (QoS) of inelastic flows within a Diffserv domain. On every link in the PCN domain, the overall rate of the PCN-traffic is metered, and PCN-packets are appropriately marked when certain configured rates are exceeded. Egress nodes provide decision points with information about the PCN-marks of PCN-packets which allows them to take decisions about whether to admit or block a new flow request, and to terminate some already admitted flows during serious pre- congestion. The PCN Working Group explored a number of approaches for encoding this pre-congestion information into the IP header. This document provides details of all those approaches along with an explanation of the constraints that had to be met by any solution.},
}