Huawei Technologies

A traffic engineering path computation method, a system and a path computation element. By using the technical solution that a path computation element locally saves the path computation result in the own autonomous system and the entry node address and the path computation element address in the neighbored downstream autonomous system, and informs the neighbored upstream autonomous system of nothing but the address of itself and the entry node address of the own autonomous system during the traffic engineering path computation process, the address of the path computation element in one autonomous system is known only by the neighbored upstream autonomous system, and doesn't be spread to all the upstream autonomous systems.

PCT/CN2007/070227