MPLS Traffic Engineering and its Formulating

MPLS is regarded as the core of the next generation IP network while traffic engineering is the key to optimize the utilization of network resources and to ensure QoS. Both of them are active research fields. Label switch router can use MPLS as new mechanisms to realize traffic engineering by calculating LSP with online or offline algorithms. This is a review paper of recent works on MPLS Traffic Engineering and its formulation study, including the advantage of MPLS traffic engineering, Problem of QoS routing, admission control, rerouting, capacity planning and deployment of MPLS traffic engineering. Open issues and further researches are also discussed.