# US 12,004,117 B2 · LMF selection method and terminal location service method and device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,004,117 B2 - Document ID: US12004117B2 - Status: Granted - Kind: B2 - Application number: 17/442,112 - Filed: 2020-03-19 - Published: 2022-05-26 - Granted: 2024-06-04 - Earliest claimed: 2019-04-02 - Assignees: Datang Mobile Communications Equipment Co., Ltd. - Applicants: Datang Mobile Communications Equipment Co.,Ltd. - Inventors: Chunlin Ni; Jing Fu - Web page: https://patentgrep.com/patent/US12004117B2 ## CPC - H04W 64/003: {locating network equipment} - H04W 4/02: Services making use of location information - H04W 4/029: Location-based management or tracking services - H04W 8/14: between corresponding nodes - H04W 28/0226: {based on location or mobility (handoff or reselection H04W36/00; mobile application services making use of the location of users or terminals H04W4/02)} - H04W 36/0055: {Transmission or use of information for re-establishing the radio link} - H04W 36/083: {wherein at least one of the access points is a moving node} - H04W 36/12: Reselecting a serving backbone network switching or routing node - H04W 48/04: based on user or terminal location or mobility data, e.g. moving direction, speed - H04W 68/12: Inter-network notification - H04W 36/322: {by location data} - H04W 64/00: Locating users or terminals {or network equipment} for network management purposes, e.g. mobility management - H04W 84/02: Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop] - H04W 88/02: Terminal devices - H04W 88/08: Access point devices - H04W 88/14: Backbone network devices - H04W 88/16: Gateway arrangements - H04W 88/18: Service support devices; Network management devices - H04W 92/02: Inter-networking arrangements - H04W 92/045: {between access point and backbone network device} - H04W 92/06: between gateways and public network devices - H04W 92/10: between terminal device and access point, i.e. wireless air interface - H04W 92/20: between access points - H04W 92/24: between 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 Disclosed by the present application are a location management function (LMF) selection method and terminal location service method and device, said method includes a mobility management function entity, in response to a location service request message from a gateway mobile location center (GMLC), choosing a first LMF to provide a location service to the terminal, sending a confirm location request message to the first LMF, the first LMF being a core network LMF or an LLMF associated with a first access node; the mobility management entity, in response to the location redirection message from the first access node or a second access node, sending a confirm location request message to a second LMF, the second LMF being selected for the terminal by the first access node or the mobility management function entity, the second LMF being a core network LMF or an LLMF associated with the second access node. ## Claims ### Claim 1 A Location Management Function, LMF, selection method, comprises: receiving, by a mobility management function entity, a location service request message from a Gateway Mobile Location Center, GMLC, wherein the location service request message is used to request to select an LMF for a target terminal; selecting, by the mobility management function entity, a first LMF to provide a location service for the target terminal in response to the location service request message, and sending a confirm location request message to the first LMF, wherein the first LMF is a core network LMF or a local LMF associated with a first access node; receiving, by the mobility management function entity, a location redirection message from the first access node or a second access node; wherein the location redirection message sent by the first access node is sent after the first access node requests at least the second access node to page the target terminal and determines that the target terminal currently resides on the second access node, and the location redirection message sent by the second access node is sent after the second access node pages the target terminal in response to a paging request of the first access node; sending, by the mobility management function entity, a confirm location request message to a second LMF in response to the location redirection message, wherein the second LMF is selected by the first access node or the mobility management function entity for the target terminal, and the second LMF is a core network LMF or a local LMF associated with the second access node; receiving, by the mobility management function entity, a confirm location response message sent by the second LMF, and sending a location service response message to the GMLC, wherein the confirm location response message and the location service response message carry position information of the target terminal. ### Claim 2 (depends on 1) The method according to claim 1, wherein the location service request message carries an identifier of the target terminal and location Quality of Service, QoS, information of the target terminal; the selecting, by the mobility management function entity, a first LMF to provide a location service for the target terminal in response to the location service request message, comprises: selecting, by the mobility management function entity, the first LMF to provide the location service for the target terminal according to the location QoS information and location capabilities of LMFs managed by the mobility management function entity in response to the location service request message. ### Claim 3 (depends on 1) The method according to of claim 1, wherein the confirm location request message sent to the first LMF and the confirm location request message sent to the second LMF carry an identifier of the target terminal and location service information of the target terminal, wherein the location service information comprises at least a location session identifier and location QoS information of the target terminal. ### Claim 4 (depends on 1) The method according to claim 1, wherein the location redirection message carries an identifier of the second access node and an identifier of the target terminal. ### Claim 5 (depends on 1) The method according to claim 1, wherein the mobility management function entity is an Access mobility Management Function, AMF, entity or a Mobility Management Function, MME, entity. ### Claim 6 (depends on 1) A communication device applied to a mobility management function entity, comprises: a processor, a memory and a communication interface; the memory is configured to store computer instructions; the processor is configured to read a program in the memory to implement the method of claim 1. ### Claim 7 (depends on 6) The communication device according to claim 6, wherein the location service request message carries an identifier of the target terminal and location Quality of Service, QoS, information of the target terminal; the processor is configured to select the first LMF to provide the location service for the target terminal in response to the location service request message, by: selecting the first LMF to provide the location service for the target terminal according to the location QoS information and location capabilities of LMFs managed by the mobility management function entity in response to the location service request message.