Patent ID: 7149299
Filing Date: 2006-12-12
Classification: H04L,H04M,H04Q

Abstract:
1. A method for providing Call Completion on Busy Subscribers (CCBS) service in a telecommunications system comprising a first Media Domain which subscribers are able to receive media calls from subscribers of a second Media Domain, wherein a first subscriber of the first Media Domain is busy to receive calls from a second subscriber of the second Media Domain, comprises the steps of: (a) determining at a network node that the called first subscriber at the first Media Domain is busy to receive new calls, and indicating to the calling second subscriber that a CCBS is possible at said first Media Domain; (b) monitoring from said network node the call status of the called first subscriber at the first Media Domain after the calling second subscriber having requested a CCBS service; (c) detecting at said network node that the called first subscriber at the first Media Domain becomes idle to receive new calls, and indicating to the calling second subscriber that a CCBS re-call may be invoked towards said first Media Domain; (d) completing from said network node the CCBS re-call as invoked by the calling second subscriber towards the called first subscriber waiting for said re-call completion at said first Media Domain; and (e) receiving at the network node from the called first subscriber an indication of a time (Ts, Tr