Fast Rerouting on Ring Topology

Dear Group,

I have question regarding to the high availability and fast rerouting design
for ring network topology.
My customer want to implement ring topology with ME 3600X to provide MPLS
L2/L3 VPN services.

What is the best practice design for ring topology with MPLS TE/Fast Reroute
or other ways to protect
their services with 50-ms rerouting time upon link failure?

Does anyone have a good reference or design method to achieve fast
convergence time for this topology?

-- 
Regards,
Pipatpong Samranpit - Triple CCIE #17451 (R&S/SP/Security)
Blogs and organic groups at http://www.ccie.net