Patent ID: 8605649
Filing Date: 2013-12-10
Classification: H04L,H04M

Abstract:
1. A method of establishing a communication session in a hierarchical communication system between a source party and at least one destination party, the hierarchical communication system having communication nodes at different levels of hierarchy, the method comprising: storing connection information for the communication session if establishing the communication session is blocked as a result of a blocking condition at a blocking node; initiating establishment of the communication session based on the stored connection information if the blocking condition no longer exists at the blocking node, the blocking node being in a communication path between the source party and the at least one destination party; and sending the connection information from the blocking node to a higher level node for call control, the higher level node being in the communication path between the source party and the at least one destination party, the higher level node being at a higher level in the communication system than the blocking node.