Here is a good white paper on MPLS-TP
What is MPLS-TP?
MPLS-TP is a set of MPLS protocols that are being defined in IETF. It is a simplified version of MPLS for transport
networks with some of the MPLS functions turned off, such as Penultimate Hop Popping (PHP), Label-Switched
Paths (LSPs) merge, and Equal Cost Multi Path (ECMP). MPLS-TP does not require MPLS control plane capabilities
and enables the management plane to set up LSPs manually. Its OAM may operate without any IP layer
functionalities.
http://www.cisco.com/en/US/technologies/tk436/tk428/white_paper_c11-562013.pdf
HTH
