Patent ID: 8787308

Claim:
An internet protocol multimedia system femtocell, comprising: a wireless session controller that serves as a micro-base station and supports circuit switched domain and internet protocol multimedia system communication sessions initiated by or addressed to user devices attached to the internet protocol multimedia system femtocell; a Wi-Fi access point that cooperates with the wireless session controller to support packet switched communication sessions to/from user devices attached to the internet protocol multimedia system femtocell; a spectrum sensor and spectrum manager that monitors spectrum usage in a location of the internet protocol multimedia system femtocell and transmits instructions to control spectrum usage by the internet protocol multimedia system femtocell to reduce a probability of interference with other service transmissions; a call continuity agent that provides a media gateway function and coordinates session handoff between the wireless session controller and the Wi-Fi access point based at least in part on instructions received from the spectrum sensor and spectrum manager; a session initiation protocol agent that provides a circuit switched-to-internet protocol multimedia system interworking function and serves as an internet protocol multimedia system service endpoint in an internet protocol multimedia system network to which the internet protocol multimedia system femtocell is connected; an authentication, authorization and accounting agent that provides authorization and accounting services to the internet protocol multimedia system femtocell and user devices that request attachment to the internet protocol multimedia system femtocell; and a backhaul interface that supports a connection to a backhaul network.