Service Gateway Decomposition in a Network Environment Including IMS

  Giyeong Son, Allan Lewis, and Bruno R. Preiss, September 2011. US Patent 8,019,820[90].

In one embodiment, a scheme is described with respect to a service network system adapted to interoperate in an Internet Protocol (IP) Multimedia Subsystem (IMS) environment wherein signaling and message media planes are decoupled. The service network system comprises a service gateway controller (SGC) that is decomposed from a plurality of a plurality of service gateways (SGWs) operable to effectuate a message transport interface with respect to a remote services server.