Patent ID: 6560458
Filing Date: 2003-05-06
Classification: H04W

Abstract:
A method for identifying a call in a telecommunications system comprising at least one network and terminals, the system determining at least one interface for the network, the interface being connected with the terminals or other networks via the interface, and a first identifier that is used on the network interfaces for identifying the call in call messages associated with the call, the method comprising:dividing the network into smaller sub-networks such that the first identifier used on the interface is unique in the sub-network area; determining a second identifier to be used for identifying the call in the whole network area; allocating one value of the second identifier to the call in connection with call setup; allocating one or more first values of the first identifier to the call in connection with call setup; binding each first identifier value to the value of the second identifier; replacing in call messages the value of the second identifier with a value of the first identifier before transmitting the message from the network via the interface; and replacing in the call messages received via the interface the value of the first identifier with the value of the second identifier in the network.