# US 11,445,474 B2 · Mobile switching node and mobility management node to page terminal device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,445,474 B2 - Document ID: US11445474B2 - Status: Granted - Kind: B2 - Application number: 17/049,730 - Filed: 2019-04-29 - Published: 2021-08-05 - Granted: 2022-09-13 - Earliest claimed: 2018-05-11 - Assignees: Telefonaktiebolaget LM Ericsson (publ) - Applicants: Telefonaktiebolaget LM Ericsson (publ) - Inventors: Lei Xia; Zhiwei Qu - Web page: https://patentgrep.com/patent/US11445474B2 ## CPC - H04W 68/02: Arrangements for increasing efficiency of notification or paging channel - H04W 92/24: between backbone network devices - H04W 8/08: Mobility data transfer - H04W 36/00224: {between packet switched [PS] and circuit switched [CS] network technologies, e.g. circuit switched fallback [CSFB]} - H04W 76/16: Involving different core network technologies, e.g. a packet-switched [PS] bearer in combination with a circuit-switched [CS] bearer - H04W 68/00: User notification, e.g. alerting and paging, for incoming communication, change of service or the like - H04W 88/14: Backbone network devices - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) ## Abstract The present disclosure relates to a mobile switching node and a mobility management node to page a terminal device. The present disclosure may provide a method for a mobile switching node to page a terminal device. The method includes: storing (S201) an indication of whether a terminal device supports a circuit switching call function; receiving (S202) a request to implement the circuit switching call function, in regard to a subscriber number corresponding to the terminal device; and sending (S203), to a mobility management node, a circuit switching paging request for the terminal device, in response to that the indication shows the terminal device supports the circuit switching call function. ## Claims ### Claim 1 A method for a mobile switching node to page a terminal device in a group of terminal devices associated with a common subscriber number, the method comprising: receiving, from a mobile management node, an indication that the terminal device supports a circuit switching call function; storing the indication; receiving a request to implement the circuit switching call function in regard to a subscriber number associated with the group of terminal devices; selecting, responsive to the request, the terminal device from the group of terminal devices associated with the common subscriber number based on the indication; and sending, to the mobility management node responsive to the request, a circuit switching paging request for the terminal device. ### Claim 2 (depends on 1) The method of claim 1, wherein the indication is received from the mobility management node. ### Claim 3 (depends on 2) The method of claim 2, wherein the indication is received from the mobility management node using a location update request. ### Claim 4 (depends on 1) The method of claim 1, wherein the indication shows that the terminal device supports only short message service, or both short message service and circuit switched fallback voice call service. ### Claim 5 A method for a mobility management node to page a terminal device in a group of terminal devices associated with a common subscriber number, the comprising: receive, by the mobility management node, device capability information for the terminal device; determining, by the mobility management node based on the received device capability information, that the terminal device supports a circuit switching call function; sending, to a mobile switching node responsive to the determining, an indication that the terminal device supports a circuit switching call function to enable selection of the terminal device by the mobile switching node from the group of terminal devices for a paging request associated with the circuit switching call function; receiving, from the mobility switching node following the sending, a circuit switching paging request for the terminal device; and paging the terminal device. ### Claim 6 (depends on 5) The method of claim 5, wherein the determining that the terminal device supports the circuit switching call function is based on an information element in a combined attach request or in a tracking area update request from the terminal device. ### Claim 7 (depends on 5) The method of claim 5, wherein the indication is sent to the mobile switching node using a location update request. ### Claim 8 A mobile switching node device to page a terminal device in a group of terminal devices associated with a common subscriber, the mobile switching node comprising: processing circuitry; memory containing instructions executable by the processing circuitry whereby the mobile switching node device is operative to: receive, from a mobile management node, an indication that the terminal device supports a circuit switching call function; store the indication; receive a request to implement the circuit switching call function in regard to a subscriber number associated with the group of terminal devices; select, responsive to the request, the terminal device from the group of terminal devices associated with the common subscriber number based on the indication; and send, to the mobility management node responsive to the request, a circuit switching paging request for the terminal device. ### Claim 9 (depends on 8) The mobile switching node device of claim 8, wherein the instructions are such that the mobile switching node device is operative to receive the indication from the mobility management node. ### Claim 10 (depends on 8) The mobile switching node device of claim 8, wherein the indication shows that the terminal device supports only short message service, or both short message service and circuit switched fallback voice call service. ### Claim 11 A mobility management node device to page a terminal device in a group of terminal devices associated with a common subscriber, the mobility management node comprising: processing circuitry; memory containing instructions executable by the processing circuitry whereby the mobility management node device is operative to: receive, by the mobility management node, device capability information for the terminal device; determine, by the mobility management node based on the received device capability information, that the terminal device supports a circuit switching call function; send, to a mobile switching node responsive to the determining, an indication that the terminal device supports a circuit switching call function to enable selection of the terminal device by the mobile switching node from the group of terminal devices for a paging request associated with the circuit switching call function; receive, from the mobility switching node following the sending, a circuit switching paging request for the terminal device; and page the terminal device. ### Claim 12 (depends on 11) The mobility management node device of claim 11, wherein the instructions are such that the mobility management node device is operative to determine whether the terminal device supports the circuit switching call function based on an information element in a combined attach request or in a tracking area update request from the terminal device. ### Claim 13 (depends on 11) The mobility management node device of claim 11, wherein the instructions are such that the mobility management node device is operative to receive the indication in a location update request. ### Claim 14 (depends on 11) The mobility management node device of claim 11, wherein the indication shows that the terminal device supports only short message service, or both short message service and circuit switched fallback voice call service.