Method and system for callback in case of an emergency session

Details Method and system for callback in case of an emergency session Method and system for callback in case of an emergency session

2006-12-05

2006-12-05

Bui, Bing Q. (Department: 2614)

Telephonic communications

Special services

Reserved call

C379S229000, C370S352000

Reexamination Certificate

active

07145997

ABSTRACT:
The invention relates to a method and system for enabling a callback from an entity to an equipment initiating a session wherein nodes involved in handling the session, are adapted to store information for the session, preferably for a predetermined time from the beginning of the session. The information includes an address of at least one other node in the signalling path, and may also include an identity of the equipment. The at least one other node will be used, in case of callback, to carry signalling related to callback from the entity to the equipment. Preferably, signalling bearer for establishing the session is maintained for a certain time from the beginning of the signalling bearer activation. The nodes preferably are IMS nodes and include P-CSCF, S-CSCF, or MGCF node.

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Bos, Lieve et al. Toward an All-IP-Based UMTS System Architecture. Jan. 2001. IEEE Network.

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