This article presents a Multi-QoS Constrained（MQCTR） T-MPLS recovery algorithm on the basis of the analysis of the limitations of the traditional algorithms.In order to enhance the success rate of recovery path set-up

it sets forth a multi-QoS-threshold constrained routing mechanism in line with the constrained routing idea.Finally

it applies

as an example

this algorithm in a mesh network and performs simulation and analysis of its performances.The results show that this algorithm does not only supports multiple recovery modes

but also has multiple service differentiation functions

which is of major significance to enhancing the survivability and robustness of carrier-level T-MPLS networks.