http://www.rfc-editor.org/rfc/rfc4655.txt
RFC 4655: A Path Computation Element (PCE)-Based Architecture, A. Farrel, J.-P. Vasseur, J. Ash2006-08-01T23:00:00-00:00This document specifies the architecture for a Path Computation Element (PCE)-based model to address this problem space. This document does not attempt to provide a detailed description of all the architectural components, but rather it describes a set of building blocks for the PCE architecture from which solutions may be constructed. This memo provides information for the Internet community.