CIRCUIT SWITCHED FALLBACK PROXY

摘要

The present invention relates to proxy (100) handling messages of a mobile user entity in a mobile communications network the mobile communications network comprising a first switching control node (15) supporting a Circuit Switched Fallback CSFB functionality and a second switching control node (18) not supporting the Circuit Switched Fallback CSFB functionality. The proxy comprises an interface configured to receive a message containing an Circuit Switched Fallback Mobile Originated CSMO call indicator or a Circuit Switched Fallback Mobile Terminated CSMT call indicator from the mobile user entity; the proxy also comprises a control unit configured to determine whether the Circuit Switched Fallback Mobile Originated CSMO call indicator or the Circuit Switched Fallback Mobile Terminated CSMT call indicator is set in the received message wherein the control unit is configured to initiate a routing of the received message to the first switching control node (15) if the Circuit Switched Fallback Mobile Originated CSMO call indicator or the Circuit Switched Fallback Mobile Terminated CSMT call indicator is set wherein the control unit is configured to initiate a routing of the received message to the second switching control node (18) if neither the Circuit Switched Fallback Mobile Originated CSMO call indicator nor the Circuit Switched Fallback Mobile Terminated CSMT call indicator is set.