# US 8,787,308 B2 · IMS femtocell for voice, data and video > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,787,308 B2 - Document ID: US8787308B2 - Status: Granted - Kind: B2 - Application number: 12/883,008 - Filed: 2010-09-15 - Published: 2012-03-15 - Granted: 2014-07-22 - Earliest claimed: 2010-09-15 - Assignees: Wi-LAN, Inc. - Applicants: Jung Yee - Inventors: Jung Yee - Web page: https://patentgrep.com/patent/US8787308B2 ## CPC - H04L 65/1016: IP multimedia subsystem [IMS] - H04L 65/1023: Media gateways - H04W 36/00226: {wherein the core network technologies comprise IP multimedia system [IMS], e.g. single radio voice call continuity [SRVCC]} - H04W 88/10: adapted for operation in multiple networks, e.g. multi-mode access points - H04W 4/90: Services for handling of emergency or hazardous situations, e.g. earthquake and tsunami warning systems [ETWS] - H04W 76/50: for emergency connections - H04W 80/10: adapted for {application} session management, e.g. SIP [Session Initiation Protocol] {(connection management H04W76/00; arrangements for session management H04L67/14)} - H04W 84/045: {using private Base Stations, e.g. femto Base Stations, home Node B} - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) ## Abstract An Internet Protocol Multimedia System (IMS) femtocell serves as a base station and base station controller in a wireless/wireline service provider's macro network and a Wi-Fi access point to seamlessly support cellular and packet user devices and deliver both circuit switched and packet switched services inside a building. ## Claims ### Claim 1 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. ### Claim 2 (depends on 1) The internet protocol multimedia system femtocell as claimed in claim 1 further comprising a global positioning system that determines geographical location coordinates of the internet protocol multimedia system femtocell. ### Claim 3 (depends on 2) The internet protocol multimedia system femtocell as claimed in claim 2 wherein the global positioning system is an assisted global positioning system. ### Claim 4 (depends on 2) The internet protocol multimedia system femtocell as claimed in claim 2 further comprising an emergency 911 system for providing the geographical coordinates to an emergency 911 system in response to an emergency 911 call launched by a user device attached to the internet protocol multimedia system femtocell. ### Claim 5 (depends on 1) The internet protocol multimedia system femtocell as claimed in claim 1 wherein the backhaul interface is an Ethernet interface that supports a connection to an Ethernet backbone. ### Claim 6 (depends on 5) The internet protocol multimedia system femtocell as claimed in claim 5, wherein the Ethernet interface supports power over Ethernet to provide operating power the internet protocol multimedia system femtocell. ### Claim 7 (depends on 1) The internet protocol multimedia system femtocell as claimed in claim 1 wherein all circuit switched and packet switched call flows initiated by or addressed to user devices attached to the internet protocol multimedia system femtocell pass through the call continuity agent. ### Claim 8 An internet protocol multimedia system femtocell, comprising: a wireless session controller that supports circuit switched domain communication sessions 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 and generates instructions to control spectrum usage by the wireless session controller and the Wi-Fi access point to reduce a probability of interference with other sensed 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; and a backhaul interface that supports a connection to a backhaul network that provides data backhaul to the internet protocol multimedia system femtocell. ### Claim 9 (depends on 8) The internet protocol multimedia system femtocell as claimed in claim 8 wherein the wireless session controller serves as a micro base station associated with a mobile switching center in a wireless service provider network. ### Claim 10 (depends on 9) The internet protocol multimedia system femtocell as claimed in claim 9 wherein the session initiation protocol agent further serves as a base station controller in the wireless service provider network. ### Claim 11 (depends on 8) The internet protocol multimedia system femtocell as claimed in claim 8 further comprising a global positioning system that determines geographical location coordinates of the internet protocol multimedia system femtocell. ### Claim 12 (depends on 11) The internet protocol multimedia system femtocell as claimed in claim 11 wherein the global positioning system is an assisted global positioning system. ### Claim 13 (depends on 11) The internet protocol multimedia system femtocell as claimed in claim 11 further comprising an emergency 911 system that provides emergency response information to a emergency 911 system when an emergency 911 call is launched by a user device attached to the internet protocol multimedia system femtocell. ### Claim 14 (depends on 8) The internet protocol multimedia system femtocell as claimed in claim 8 wherein the backhaul interface comprises an Ethernet interface that supports a connection to an Ethernet backbone. ### Claim 15 (depends on 14) The internet protocol multimedia system femtocell as claimed in claim 14, wherein the Ethernet interface supports power over Ethernet to provide operating power the internet protocol multimedia system femtocell. ### Claim 16 (depends on 8) The internet protocol multimedia system femtocell as claimed in claim 8 wherein all circuit switched domain and power switched domain call data flows through the call continuity agent. ### Claim 17 An internet protocol multimedia system femtocell, comprising: a wireless session controller that supports circuit switched domain communications and packet switched domain communications 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 provides a media gateway function and coordinates handoff between the wireless controller and the Wi-Fi access point based upon, at least in part, instructions from the spectrum sensor and spectrum manager, all voice and data flows passing through the call continuity agent; a session initiation protocol agent 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; a backhaul interface that supports a connection to a backhaul network. ### Claim 18 (depends on 17) The internet protocol multimedia system femtocell as claimed in claim 17 further comprising a global positioning system that determines geographical location coordinates of the internet protocol multimedia system femtocell.