# US 12,184,388 B2 · Abnormal offline state determining method and related apparatus > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,184,388 B2 - Document ID: US12184388B2 - Status: Granted - Kind: B2 - Application number: 17/686,470 - Filed: 2022-03-04 - Published: 2022-08-25 - Granted: 2024-12-31 - Earliest claimed: 2019-09-05 - Assignees: Huawei Technologies Co., Ltd. - Applicants: Huawei Technologies Co., Ltd. - Inventors: Chengchen Zhang; Lin Shu; Wenfu Wu - Web page: https://patentgrep.com/patent/US12184388B2 ## CPC - H04B 7/18506: {Communications with or from aircraft, i.e. aeronautical mobile service} - H04W 24/04: Arrangements for maintaining operational condition - H04W 8/02: Processing of mobility data, e.g. registration information at HLR [Home Location Register] or VLR [Visitor Location Register]; Transfer of mobility data, e.g. between HLR, VLR or external networks - H04W 84/06: Airborne or Satellite Networks (space-based or airborne stations H04B7/185) - H04B: TRANSMISSION - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) ## Abstract This application discloses an abnormal offline state determining method and a related apparatus. The method includes: An access and mobility management function network element (AMF) obtains location information when an uncrewed aerial vehicle enters or leaves an offline state. If a location indicated by the location information is outside a target offline area, the AMF marks a state of the uncrewed aerial vehicle as an abnormal offline state. The AMF sends a state identifier of the abnormal offline state to an unmanned aircraft system traffic management network element (UTM). Therefore, the location information when the uncrewed aerial vehicle enters or leaves the offline state is used to determine whether the uncrewed aerial vehicle is in the abnormal offline state, so that accuracy of determining the abnormal offline state of the uncrewed aerial vehicle can be improved to some extent. ## Claims ### Claim 1 An abnormal offline state determining method, wherein the method comprises: a first determining, by an access and mobility management function network element (AMF), whether an uncrewed aerial vehicle enters or leaves an offline state; obtaining, by the AMF, location information of the uncrewed aerial vehicle when the uncrewed aerial vehicle enters or leaves the offline state; a second determining, by the AMF, whether a location of the uncrewed aerial vehicle indicated by the location information is outside a target offline area in which the uncrewed aerial vehicle is allowed to enter the offline state; and when the first determining indicates that the uncrewed aerial vehicle enters or leaves the offline state and the second determining indicates that the location of the uncrewed aerial vehicle indicated by the location information is outside the target offline area: marking, by the AMF, a state of the uncrewed aerial vehicle as an abnormal offline state; and sending, by the AMF, a state identifier of the abnormal offline state to an unmanned aircraft system traffic management network element (UTM). ### Claim 2 (depends on 1) The method according to claim 1, wherein the method further comprises: receiving, by the AMF, a first message sent by the UTM, wherein the first message carries a first offline area; and determining, by the AMF, the first offline area as the target offline area. ### Claim 3 (depends on 1) The method according to claim 1, wherein the method further comprises: receiving, by the AMF, a second message sent by a unified data management network element (UDM), wherein the second message carries a first offline area; and determining, by the AMF, the first offline area as the target offline area. ### Claim 4 (depends on 1) The method according to claim 1, wherein the method further comprises: receiving, by the AMF, a registration request sent by the uncrewed aerial vehicle, wherein the registration request carries a second offline area, and the second offline area is an offline area expected by the uncrewed aerial vehicle; sending, by the AMF, an authorization request to the UTM, wherein the authorization request carries the second offline area; receiving, by the AMF, an authorization response sent by the UTM, wherein the authorization response carries a third offline area, the third offline area is an allowed offline area determined by the UTM based on the second offline area, and determining, by the AMF, the third offline area as the target offline area; and sending, by the AMF, a registration accept response to the uncrewed aerial vehicle, wherein the registration accept response carries the third offline area, and the registration accept response indicates to the uncrewed aerial vehicle to determine the third offline area as the target offline area. ### Claim 5 (depends on 1) The method according to claim 1, wherein the method further comprises: receiving, by the AMF, a registration request sent by the uncrewed aerial vehicle, wherein the registration request carries a second offline area, and the second offline area is an offline area expected by the uncrewed aerial vehicle; sending, by the AMF, a query request to a unified data management network element (UDM); receiving, by the AMF, a query response sent by the UDM, wherein the query response carries a subscribed offline area of the uncrewed aerial vehicle; obtaining, by the AMF, a third offline area based on an allowed offline area determined based on the second offline area and the subscribed offline area of the uncrewed aerial vehicle, and determining, by the AMF, the third offline area as the target offline area; and sending, by the AMF, a registration accept response to the uncrewed aerial vehicle, wherein the registration accept response carries the third offline area, and the registration accept response indicates to the uncrewed aerial vehicle to determine the third offline area as the target offline area. ### Claim 6 An abnormal offline state determining method, wherein the method comprises: receiving, by an unmanned aircraft system traffic management network element (UTM), a state identifier that is of an abnormal offline state and that is sent by an access and mobility management function network element (AMF), wherein the state identifier of the abnormal offline state indicates that when an uncrewed aerial vehicle enters or leaves an offline state, a location of the uncrewed aerial vehicle indicated by location information of the uncrewed aerial vehicle is outside a target offline area in which the uncrewed aerial vehicle is allowed to enter the offline state; and storing, by the UTM, the state identifier of the abnormal offline state. ### Claim 7 (depends on 6) The method according to claim 6, wherein the method further comprises: sending, by the UTM, a first message to the AMF, wherein the first message carries a first offline area, and the first message indicates to the AMF to determine the first offline area as the target offline area. ### Claim 8 (depends on 6) The method according to claim 6, wherein the method further comprises: receiving, by the UTM, an authorization request sent by the AMF, wherein the authorization request carries a second offline area, and the second offline area is an offline area expected by the uncrewed aerial vehicle; determining, by the UTM, an allowed offline area based on the second offline area, to obtain a third offline area; and sending, by the UTM, an authorization response to the AMF, wherein the authorization response carries the third offline area, and the authorization response indicates to the AMF to determine the third offline area as the target offline area. ### Claim 9 (depends on 6) The method according to claim 6, wherein the method further comprises: ending, by the UTM, a configuration update request to a unified data management network element (UDM), wherein the configuration update request carries a first offline area of the uncrewed aerial vehicle, and the configuration update request indicates to the UDM to determine the first offline area of the uncrewed aerial vehicle as the target offline area; and receiving, by the UTM, a configuration update response sent by the UDM, wherein the configuration update response indicates that the UDM has determined the first offline area as the target offline area. ### Claim 10 A network device comprising a processor and a memory, wherein the memory is configured to store an executable instruction that, when the network device operates as an access and mobility management function network element (AMF), causes the processor to execute the executable instruction stored in the memory so that the network device performs operations comprising: a first determining whether an uncrewed aerial vehicle enters or leaves an offline state; obtaining location information of the uncrewed aerial vehicle when the uncrewed aerial vehicle enters or leaves the offline state; a second determining whether a location of the uncrewed aerial vehicle indicated by the location information is outside a target offline area in which the uncrewed aerial vehicle is allowed to enter the offline state; and when the first determining indicates that the uncrewed aerial vehicle enters or leaves the offline state and the second determining indicates that the location of the uncrewed aerial vehicle indicated by the location information is outside the target offline area: marking a state of the uncrewed aerial vehicle as an abnormal offline state; and sending a state identifier of the abnormal offline state to an unmanned aircraft system traffic management network element (UTM). ### Claim 11 (depends on 10) The network device according to claim 10, wherein the network device further performs: receiving a first message sent by the UTM, wherein the first message carries a first offline area; and determining the first offline area as the target offline area. ### Claim 12 (depends on 10) The network device according to claim 10, wherein the network device further performs: receiving a second message sent by a unified data management network element (UDM), wherein the second message carries a first offline area; and determining the first offline area as the target offline area. ### Claim 13 (depends on 10) The network device according to claim 10, wherein the network device further performs: receiving a registration request sent by the uncrewed aerial vehicle, wherein the registration request carries a second offline area, and the second offline area is an offline area expected by the uncrewed aerial vehicle; sending an authorization request to the UTM, wherein the authorization request carries the second offline area; receiving an authorization response sent by the UTM, wherein the authorization response carries a third offline area that is an allowed offline area determined by the UTM based on the second offline area; determining the third offline area as the target offline area; and sending a registration accept response to the uncrewed aerial vehicle, wherein the registration accept response carries the third offline area, and the registration accept response indicates to the uncrewed aerial vehicle to determine the third offline area as the target offline area. ### Claim 14 (depends on 10) The network device according to claim 10, wherein the network device further performs: receiving a registration request sent by the uncrewed aerial vehicle, wherein the registration request carries a second offline area, and the second offline area is an offline area expected by the uncrewed aerial vehicle; sending a query request to a unified data management network element (UDM); receiving a query response sent by the UDM, wherein the query response carries a subscribed offline area of the uncrewed aerial vehicle; obtaining a third offline area based on an allowed offline area determined based on the second offline area and the subscribed offline area of the uncrewed aerial vehicle; determining the third offline area as the target offline area; and sending a registration accept response to the uncrewed aerial vehicle, wherein the registration accept response carries the third offline area, and the registration accept response indicates to the uncrewed aerial vehicle to determine the third offline area as the target offline area. ### Claim 15 (depends on 10) The network device according to claim 10, wherein the network device further performs: comparing the location indicated by the location information with the target offline area, and if the location indicated by the location information does not exist in the target offline area, determining that the location indicated by the location information is outside the target offline area. ### Claim 16 (depends on 1) The method according to claim 1, wherein the method further comprises: comparing the location indicated by the location information with the target offline area, and if the location indicated by the location information does not exist in the target offline area, determining that the location indicated by the location information is outside the target offline area. ### Claim 17 (depends on 6) The method according to claim 6, wherein the method further comprises: sending a deactivation offline message to the AMF to indicate to the AMF to deactivate the offline state of the uncrewed aerial vehicle.