Multiplex communications – Pathfinding or routing – Combined circuit switching and packet switching
Reexamination Certificate
2005-07-01
2010-11-30
Ho, Duc C (Department: 2465)
Multiplex communications
Pathfinding or routing
Combined circuit switching and packet switching
C713S151000
Reexamination Certificate
active
07843902
ABSTRACT:
A method in a telecommunication system for monitoring a communication by a Law Enforcement Monitoring Facility (LEMF). The LEMF sends a request for monitoring of a first party to a Call Session Control Function (CSCF) in a service domain of the telecommunication system. When the CSCF detects a SIP session event due to a setup of a media-flow connection between the monitored party and a second party, the CSCF sends Interception Related Information (IRI) toward the LEMF, and sends a resource setup message to a Multimedia Resource Function (MRF), also in the service domain. A Gateway GPRS Support Node (GGSN) routes the Communication Content (CC) to the MRF. The MRF copies the CC and routes one copy back to the GGSN and routes the other copy to the LEMF via a Delivery Function utilizing a SIP session with the LEMF.
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Imbimbo Amedeo
Iov'eno Maurizio
Ho Duc C
Relefonaktiebolaget L M Ericsson
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