Communication between call controllers by amending call processing messages

US7711828B2 · kind B2 · utility

Assignee

• Nortel Networks Limited · CA

Inventors

• Stephen Shew · Gatineau, CA
• Malcolm Betts · Gatineau, CA
• Erning Ye · Gatineau, CA

Key dates

• Filing date: Jul 14, 2006
• Grant date: May 4, 2010
• Expiry date: Feb 4, 2029

Classification

• Technology area (CPC H): Electricity
• CPC primary: H04Q2213/13396
• WIPO field: Telecommunications
• WIPO sector: Electrical engineering

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.