# US 12,015,651 B2 · Apparatus, method and computer program for supporting fixed-line user equipment > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,015,651 B2 - Document ID: US12015651B2 - Status: Granted - Kind: B2 - Application number: 17/425,199 - Filed: 2019-01-31 - Published: 2022-03-24 - Granted: 2024-06-18 - Earliest claimed: 2019-01-31 - Assignees: Nokia Technologies Oy - Applicants: Nokia Technologies Oy - Inventors: Ashok Kumar Nayak - Web page: https://patentgrep.com/patent/US12015651B2 ## CPC - H04L 65/1016: IP multimedia subsystem [IMS] - H04L 65/1073: Registration or de-registration - H04L 67/52: specially adapted for the location of the user terminal - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) ## Abstract The disclosed apparatus comprises means for performing storing location information of one or more fixed-line user equipment operating in an internet protocol multimedia subsystem. In response to an update of location information at the apparatus for one or more of the fixed-line user equipment, the apparatus comprises means for sending a message to a serving call state control function serving the one or more fixed-line user equipment. The message indicates a location update of the one or more fixed-line user equipment whose location information has been updated at the apparatus. ## Claims ### Claim 1 An apparatus, comprising: at least one processor; and at least one memory comprising computer program code, the at least one memory and computer program code configured, with the at least one processor, to cause the apparatus at least to: store location information of a fixed-line user equipment operating in an internet protocol multimedia subsystem; and in response to location information of the fixed-line user equipment being updated by the apparatus, send a registration termination request to a serving call state control function serving the fixed-line user equipment, the registration termination request comprising a reason code indicating that the location information of the fixed-line user equipment has been updated at the apparatus. ### Claim 2 (depends on 1) The apparatus according to claim 1, wherein the sending the registration termination request to the serving call state control function serving the fixed-line user equipment comprises sending the registration termination request to the serving call state control function in response to receiving a request to update the location information of the fixed-line user equipment at the apparatus. ### Claim 3 (depends on 1) The apparatus according to claim 1, wherein the registration termination request comprises an attribute value pair comprising the reason code indicating the location information of the fixed-line user equipment has been updated. ### Claim 4 An apparatus, comprising: at least one processor; and at least one memory comprising computer program code, the at least one memory and computer program code configured, with the at least one processor, to cause the apparatus at least to: receive, from a home subscriber server, a registration termination request comprising a reason code indicating location information of a fixed-line user equipment being served by the apparatus has been updated by the home subscriber server; and in response to the receiving the registration termination request, send a notification to the fixed-line user equipment, the notification indicating that the fixed-line user equipment is temporarily deactivated by the apparatus for causing the fixed-line user equipment to re-register with the apparatus. ### Claim 5 (depends on 4) The apparatus according to claim 4, wherein the notification comprises a NOTIFY message comprising a deactivation event field comprising the notification indicating that the fixed-line user equipment is temporarily deactivated by the apparatus. ### Claim 6 (depends on 4) The apparatus according to claim 4, wherein the registration termination request comprises an attribute value pair comprising the reason code indicating location information of the fixed-line user equipment being served by the apparatus has been updated by the home subscriber server. ### Claim 7 (depends on 4) The apparatus according to claim 4, wherein the at least one memory and computer program code are further configured, with the at least one processor, to cause the apparatus at least to update emergency call information for the fixed-line user equipment, in response to the receiving the response from the home subscriber server. ### Claim 8 (depends on 7) The apparatus according to claim 7, wherein the emergency call information comprises public safety answering point information. ### Claim 9 A method comprising: storing, at an apparatus, location information of a fixed-line user equipment operating in an internet protocol multimedia subsystem; and in response to the location information of the fixed-line user equipment being updated by the apparatus, sending, a registration termination request to a serving call state control function serving the fixed-line user equipment, the registration termination request comprising a reason code indicating that the location information of the fixed-line user equipment has been updated at the apparatus. ### Claim 10 (depends on 9) The method according to claim 9, wherein the sending the registration termination request to the serving call state control comprises sending the registration termination request to the serving call state control function in response to receiving a request to update the location information of the fixed-line user equipment at the apparatus. ### Claim 11 (depends on 9) The method according to claim 9, wherein the registration termination request comprises an attribute value pair comprising the reason code indicating location information of the fixed-line user equipment has been updated. ### Claim 12 A method comprising: receiving at an apparatus from a home subscriber server, a registration termination request comprising a reason code indication location information of a fixed-line user equipment being served by the apparatus that has been updated by the home subscriber server; and in response to the receiving the registration termination request, sending a notification to the fixed-line user equipment, the notification indicating that the fixed-line user equipment is temporarily deactivated by the apparatus for causing the fixed-line user equipment to re-register with the apparatus. ### Claim 13 (depends on 12) The method according to claim 12, wherein the notification comprises a NOTIFY message comprising a deactivation event field comprising the notification indicating that the fixed-line user equipment is temporarily deactivated by the apparatus. ### Claim 14 (depends on 12) The method according to claim 12, comprising updating emergency call information for the fixed-line user equipment, in response to the receiving the response from the home subscriber server. ### Claim 15 (depends on 14) The method according to claim 14, wherein the emergency call information comprises public safety answering point information.