METHOD AND APPARATUS FOR ACQUIRING CROSS-DOMAIN END-TO-END ROUTE, AND CHILD PATH COMPUTATION ENTITY

摘要

Disclosed are a method and an apparatus for acquiring a cross-domain end-to-end path, and a child path computation entity (PCE). The method comprises: a parent PCE receiving a first request message; under triggering of the first request message, the parent PCE sending a second request message to a child PCE thereof involved in a cross-domain path computation; the parent PCE receiving cross-domain topology information determined and reported by the child PCE according to the second request message; and the parent PCE computing an optimal cross-domain end-to-end path according to the received cross-domain topology information. By means of the above technical solution provided in the present invention, problems in the art such as poor accuracy of the optimal cross-domain end-to-end path computed through a cross-domain path technology are solved, so that network topology information finally obtained by the parent PCE for cross-domain path computation can better reflect actual current conditions of a current network topology, thereby improving the accuracy of the path computation.