%% You should probably cite rfc7846 instead of this I-D.
@techreport{ietf-ppsp-base-tracker-protocol-12,
    number =    {draft-ietf-ppsp-base-tracker-protocol-12},
    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-ppsp-base-tracker-protocol/12/},
    author =    {Rui António dos Santos Cruz and Mario Sera Nunes and Jinwei Xia and Rachel Huang and Joao P. Taveira and Deng Lingli},
    title =     {{Peer-to-Peer Streaming Tracker Protocol (PPSTP)}},
    pagetotal = 55,
    year =      2015,
    month =     dec,
    day =       30,
    abstract =  {This document specifies the base Peer-to-Peer Streaming Tracker Protocol (PPSTP) version 1, an application-layer control (signaling) protocol for the exchange of meta information between trackers and peers. The specification outlines the architecture of the protocol and its functionality; it also describes message flows, message processing instructions, message formats, formal syntax, and semantics. The PPSTP enables cooperating peers to form content-streaming overlay networks to support near real-time delivery of structured media content (audio, video, and associated timed text and metadata), such as adaptive multi-rate, layered (scalable), and multi-view (3D) videos in live, time-shifted, and on-demand modes.},
}