%% You should probably cite rfc7449 instead of this I-D.
@techreport{ietf-pce-wson-routing-wavelength-15,
    number =    {draft-ietf-pce-wson-routing-wavelength-15},
    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-pce-wson-routing-wavelength/15/},
    author =    {Young Lee and Greg M. Bernstein and Jonas Mårtensson and Tomonori Takeda and Takehiro Tsuritani and Oscar Gonzalez de Dios},
    title =     {{Path Computation Element Communication Protocol (PCEP) Requirements for Wavelength Switched Optical Network (WSON) Routing and Wavelength Assignment}},
    pagetotal = 12,
    year =      2014,
    month =     oct,
    day =       28,
    abstract =  {This memo provides application-specific requirements for the Path Computation Element Communication Protocol (PCEP) for the support of Wavelength Switched Optical Networks (WSONs). Lightpath provisioning in WSONs requires a Routing and Wavelength Assignment (RWA) process. From a path computation perspective, wavelength assignment is the process of determining which wavelength can be used on each hop of a path and forms an additional routing constraint to optical light path computation. Requirements for PCEP extensions in support of optical impairments will be addressed in a separate document.},
}