Communication between call controllers by amending call processing messages
AssigneeCiena Corporation
InventorsStephen D. Shew, Malcolm Betts, Erning E. Ye
Life of this patent
Estimating the term…
Abstract
Call Control entities in a network communicate between themselves by amending call processing messages to include encrypted network information. As such, a call may be established whose path through the network is dependent on the paths of other calls. Information of a scope larger than a Call Controller normally possesses can, as a result of this communication, be made available to Call Controllers for constraining call establishment. This information could relate to other calls and connections associated with those other calls. The information may also relate to gateways in and to adjacent networks and the Call Controllers in the adjacent networks that are related to the current Call Controller.
Claims12
At a source client call controller connected to a connection-oriented network including a plurality of interconnected network call controllers, a method of requesting the establishment of a given call to a destination client call controller, said method comprising:
- receiving a notification, from a first network call controller, that a first call request message has been rejected, where said notification includes encrypted network information related to a path to be used by said given call and non-encrypted network information;
- selecting a network call controller based on said non-encrypted network information;
- and
- responsive to said receiving said notification, sending a second call request message, to said second network call controller, requesting establishment of said given call, where said second call request message includes said encrypted network information.
A client call controller connected to a connection-oriented network including a plurality of interconnected network call controllers, said client call controller comprising:
- an input network interface adapted to receive a notification, from a first network call controller, that a first call request message has been rejected, where said notification includes encrypted network information related to a path to be used by said given call and non-encrypted network information;
- a hardware processor adapted to select a second call controller based on said non-encrypted network information;
- and
- an output network interface adapted to send a second call request message, to said second call controller, requesting establishment of said given call, where said second call request message includes said encrypted network information.
Dependencies are inferred from the claim text.