Patent ID: 9031085
Filing Date: 2015-05-12
Classification: H04L

Abstract:
1. An apparatus comprising: an interface operable to enable communications with a plurality of routing path calculation devices, the routing path calculation devices being capable of calculating routing paths within respective routing areas of a communication system; and a routing path calculation control module operatively coupled to the interface and operable to identify routing areas of the respective routing areas that are involved in a routing path between routing path endpoints in different routing areas of the respective routing areas, to request, from multiple routing path calculation devices of the plurality of routing path calculation devices, respective routing path calculations for segments of the routing path in the identified routing areas, and to receive multiple routing path calculation responses from the multiple routing path calculation devices, the multiple routing path calculation responses comprising a respective response from each of the multiple routing path calculation devices, the respective response from each of the multiple routing path calculation devices comprising an indication of a result of the routing path calculation performed by the routing path calculation device for a respective segment of the routing path, the routing path calculation control module being operable to identify a first routing area in which one of the routing path endpoints is located, and to identify each other routing area involved in the routing path based on the indication of the result of the routing path calculation in each respective response.