Abstract: A distributed adaptive traffic engineering algorithm HDCA（heuristic delay and congestion based algorithm of traffic engineering）for the MPLS（multiprotocol label switching）network is proposed in this paper. This algorithm is based on the LSP's (label switching path) delay and congestion. A mathematical model of the whole network traffic optimization was established,and HDCA algorithm was designed in terms of the mathematical model's hierarchie s. In this algorithm, tabu search and nonlinear changes of parameters were adopted to achieve excellent realtime performance, fast convergence speed, high stability, little running time and little network overhead. The simulation analysis shows that the HDCA algorithm fits to the traffic optimizing in the bone network.

Key words: traffic engineering, heuristic, multiprotocol labelswitching, math model