# US 2020/0288378 A1 · Method for accessing local network and device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2020/0288378 A1 - Document ID: US20200288378A1 - Status: Published application - Kind: A1 - Application number: 16/884,507 - Filed: 2020-05-27 - Published: 2020-09-10 - Earliest claimed: 2017-11-28 - Assignees: Huawei Technologies Co., Ltd. - Applicants: Huawei Technologies Co., Ltd. - Inventors: Yu YIN; Caixia QI - Web page: https://patentgrep.com/patent/US20200288378A1 ## CPC - H04M 15/00: Arrangements for metering, time-control or time indication {; Metering, charging or billing arrangements for voice wireline or wireless communications, e.g. VoIP} - H04L 12/14: Charging, metering or billing arrangements specially adapted for data communications, e.g. authentication, authorisation and accounting [AAA] framework - H04L 12/1407: {Policy-and-charging control [PCC] architecture} - H04L 12/28: characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks] (wireless communication networks H04W {; arrangements for dividing the transmission path H04W40/00}) - H04M 15/64: {On-line charging system [OCS]} - H04M 15/66: {Policy and charging system} - H04W 4/24: Accounting or billing - H04W 48/10: using broadcasted information - H04W 48/16: Discovering, processing access restriction or access information - H04W 48/14: using user query {or user detection} - H04W 48/18: Selecting a network or a communication service - H04M: TELEPHONIC COMMUNICATION (circuits for controlling other apparatus via a telephone cable and not involving telephone switching apparatus G08) - 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 A method for accessing a local network includes: subscribing, by a network device, to service area change information of user equipment, where the service area change information of the user equipment indicates that the user equipment enters or leaves a service area of the local network; receiving, by the network device, the service area change information of the user equipment; and performing, based on the received service area change information, policy control for the user equipment accessing or leaving the local network. In this way, access to the local network is accurately controlled, and is not affected by wireless network planning and adjustment, which greatly enhances user experience in use of the local network. ## Claims ### Claim 1 A method for accessing a local network, comprising: receiving, by user equipment, a system message broadcast by a base station; determining, based on the system message, that a service area is changed; and notifying a network device that the service area is changed, so that the network device performs policy control for accessing or leaving the local network corresponding to the service area. ### Claim 2 (depends on 1) The method according to claim 1, wherein the determining, based on the system message, that the service area is changed comprises: determining, by the user equipment based on the received system message comprising an identifier of the service area, that the user equipment enters the service area; and the notifying of the network device that the service area is changed comprises: sending, by the user equipment, a service area entering notification message to the network device, wherein the service area entering notification message comprises the identifier of the service area that the user equipment enters; or wherein the determining, based on the system message, that the service area is changed comprises: determining, by the user equipment based on the received system message not comprising an identifier of the service area, that the user equipment leaves the service area; and the notifying of the network device that the service area is changed comprises: sending, by the user equipment, a service area leaving notification message to the network device, wherein the service area leaving notification message comprises the identifier of the service area that the user equipment leaves. ### Claim 3 (depends on 1) The method according to claim 1, wherein before the receiving of the system message broadcast by the base station, the method further comprises: receiving, by the user equipment, a list of identifiers of service areas that is sent by the network device, wherein the list of identifiers of service areas comprises identifiers of one or more service areas and indicates the user equipment to send a notification message to the network device after the user equipment enters or leaves the service area; or wherein before the receiving of the system message broadcast by the base station, the method further comprises: receiving, by the user equipment, a service area leaving reporting indication message sent by the network device, wherein the service area leaving reporting indication message comprises the identifier of the service area and indicates the user equipment to send the notification message to the network device after the user equipment leaves the service area. ### Claim 4 (depends on 1) The method according to claim 1, wherein the identifier of the service area corresponds to a service area of the local network, and the service area comprises one or more location areas. ### Claim 5 A method for accessing a local network, comprising: subscribing, by a network device, to service area change information of user equipment, wherein the service area change information of the user equipment indicates that the user equipment enters or leaves a service area of the local network; receiving the service area change information of the user equipment; and performing, based on the received service area change information, policy control for a case in which the user equipment accesses or leaves the local network. ### Claim 6 (depends on 5) The method according to claim 5, wherein the subscribing, by the network device, to the service area change information of the user equipment comprises: sending, by the network device, a list of identifiers of service areas to the user equipment, wherein the list of identifiers of service areas comprises identifiers of one or more service areas and indicates the user equipment to send a notification message to the network device after the user equipment enters or leaves the service area, wherein the list of service areas is at least one of the following: a list of service areas allowing access of the user equipment that is comprised in subscription data of the user equipment, a list of service areas allowing access of the user equipment that is comprised in policy data, or a list of service areas allowing access of the user equipment that is comprised in local configuration of the network device. ### Claim 7 (depends on 5) The method according to claim 5, wherein the subscribing, by the network device, to the service area change information of the user equipment comprises: sending, by the network device, a service area subscription message to a base station, wherein the service area subscription message comprises a list of identifiers of service areas, wherein the list of identifiers of service areas comprises identifiers of one or more service areas and indicates the base station to send a service area reporting message to the network device after the user equipment enters the service area, wherein the list of service areas is a list of local networks allowing access of the user equipment that is locally configured by the network device. ### Claim 8 (depends on 7) The method according to claim 7, wherein the service area subscription message further comprises a user equipment identity, and the user equipment identity indicates the base station to send the service area reporting message to the network device after the user equipment enters the service area; and the list of service areas is at least one of the following: a list of service areas allowing access of the user equipment that is comprised in subscription data of the user equipment, a list of service areas allowing access of the user equipment that is comprised in policy data, or a list of service areas allowing access of the user equipment that is comprised in local configuration of the network device. ### Claim 9 (depends on 7) The method according to claim 7, further comprising: receiving, by the network device, the service area reporting message sent by the base station, wherein the message comprises an identifier of the service area that the user equipment enters; and sending, by the network device, a service area leaving reporting indication message to the user equipment, wherein the service area leaving reporting indication message comprises the identifier of the service area and indicates the user equipment to send a notification message to the network device after the user equipment leaves the service area. ### Claim 10 (depends on 5) The method according to claim 5, wherein the receiving the service area change information of the user equipment is receiving a service area entering notification message indicating that the user equipment enters the service area, and the service area entering notification message comprises the identifier of the service area; and the performing of the policy control for a case in which the user equipment accesses the local network comprises: establishing a session between the user equipment and a local gateway corresponding to the identifier of the service area; or wherein the receiving the service area change information of the user equipment is receiving a service area entering notification message indicating that the user equipment enters the service area, and the service area entering notification message comprises the identifier of the service area, and the performing of the policy control for a case in which the user equipment accesses the local network comprises: establishing a session from the user equipment through a traffic distribution device to a local gateway corresponding to the identifier of the service area, and establishing a session from the user equipment through the traffic distribution device to a public gateway; or wherein the receiving the service area change information of the user equipment is receiving a service area leaving notification message indicating that the user equipment leaves the service area; and the performing policy control for a case in which the user equipment leaves the local network comprises: deleting, by the network device, the session between the user equipment and the local gateway. ### Claim 11 (depends on 5) The method according to claim 5, wherein the identifier of the service area corresponds to a service area of the local network, and the service area comprises one or more location areas. ### Claim 12 A service area notification method, comprising: broadcasting, by a base station, a system message to user equipment, wherein the system message comprises an identifier of a service area, to notify the user equipment of the service area in which the user equipment is currently located; wherein the identifier of the service area corresponds to the service area of a local network, and the service area comprises one or more location areas. ### Claim 13 A service area notification method, comprising: receiving, by a base station, a service area subscription message sent by a network device, wherein the service area subscription message comprises a list of identifiers of service areas, wherein the list of identifiers of service areas comprises identifiers of one or more service areas and indicates the base station to send a service area reporting message to the network device after user equipment enters the service area; and sending, by the base station, the service area reporting message to the network device after the user equipment enters the service area. ### Claim 14 User equipment, comprising a receiver, a processor, and a transmitter, wherein the receiver is configured to receive a system message broadcast by a base station; the processor is configured to determine, based on the system message, that a service area is changed; and the transmitter is configured to notify a network device that the service area is changed, so that the network device performs policy control for accessing or leaving a local network corresponding to the service area. ### Claim 15 (depends on 14) The user equipment according to claim 14, wherein so that the processor determines, based on the system message, that the service area is changed, the processor is further configured to determine, based on the received system message comprising an identifier of the service area, that the user equipment enters the service area; and so that the transmitter notifies the network device that the service area is changed, the transmitter is further configured to send a service area entering notification message to the network device, wherein the service area entering notification message comprises the identifier of the service area that the user equipment enters; or wherein so that the processor determines, based on the system message, that the service area is changed, the processor is further configured to determine, based on the received system message not comprising an identifier of the service area, that the user equipment leaves the service area; and so that the transmitter notifies the network device that the service area is changed, the transmitter is further configured to send a service area leaving notification message to the network device, wherein the service area leaving notification message comprises the identifier of the service area that the user equipment leaves. ### Claim 16 (depends on 14) The user equipment according to claim 14, wherein the receiver is further configured to, before the receiver receives the system message broadcast by the base station, receive a list of identifiers of service areas that is sent by the network device, wherein the list of identifiers of service areas comprises identifiers of one or more service areas and indicates the user equipment to send a notification message to the network device after the user equipment enters or leaves the service area; or wherein the receiver is further configured to, before the receiver receives the system message broadcast by the base station, receive a service area leaving reporting indication message sent by the network device, wherein the service area leaving reporting indication message comprises the identifier of the service area and indicates the user equipment to send the notification message to the network device after the user equipment leaves the service area. ### Claim 17 (depends on 14) The user equipment according to claim 14, wherein the identifier of the service area corresponds to a service area of the local network, and the service area comprises one or more location areas. ### Claim 18 A network device, comprising a transmitter, a receiver, and a processor, wherein the transmitter is configured to subscribe to service area change information of user equipment, wherein the service area change information of the user equipment indicates that the user equipment enters or leaves a service area of a local network; the receiver is configured to receive the service area change information of the user equipment; and the processor is configured to perform, based on the received service area change information, policy control for a case in which the user equipment accesses or leaves the local network. ### Claim 19 (depends on 18) The network device according to claim 18, wherein so that the transmitter subscribes to the service area change information of the user equipment, the transmitter is further configured to: send a list of identifiers of service areas to the user equipment, wherein the list of identifiers of service areas comprises identifiers of one or more service areas and indicates the user equipment to send a notification message to the network device after the user equipment enters or leaves the service area, wherein the list of service areas is at least one of the following: a list of service areas allowing access of the user equipment that is comprised in subscription data of the user equipment, a list of service areas allowing access of the user equipment that is comprised in policy data, or a list of service areas allowing access of the user equipment that is comprised in local configuration of the network device. ### Claim 20 (depends on 18) The network device according to claim 18, wherein so that the transmitter subscribes to the service area change information of the user equipment, the transmitter is further configured to: send a service area subscription message to a base station, wherein the service area subscription message comprises a list of identifiers of service areas, wherein the list of identifiers of service areas comprises identifiers of one or more service areas and indicates the base station to send a service area reporting message to the network device after the user equipment enters the service area, wherein the list of service areas is a list of local networks allowing access of the user equipment that is locally configured by the network device. ### Claim 21 (depends on 20) The network device according to claim 20, wherein the service area subscription message further comprises a user equipment identity, and the user equipment identity indicates the base station to send the service area reporting message to the network device after the user equipment enters the service area; and the list of service areas is at least one of the following: a list of service areas allowing access of the user equipment that is comprised in subscription data of the user equipment, a list of service areas allowing access of the user equipment that is comprised in policy data, or a list of service areas allowing access of the user equipment that is comprised in local configuration of the network device. ### Claim 22 (depends on 20) The network device according to claim 20, wherein: the receiver is further configured to receive the service area reporting message sent by the base station, wherein the message comprises an identifier of the service area that the user equipment enters; and the transmitter is further configured to send a service area leaving reporting indication message to the user equipment, wherein the service area leaving reporting indication message comprises the identifier of the service area and indicates the user equipment to send a notification message to the network device after the user equipment leaves the service area. ### Claim 23 (depends on 18) The network device according to claim 18, wherein so that the receiver receives the service area change information of the user equipment, the receiver is further configured to receive a service area entering notification message indicating that the user equipment enters the service area, and the service area entering notification message comprises an identifier of the service area; and so that the processor performs the policy control for the case in which the user equipment accesses the local network, the processor is further configured to establish a session between the user equipment and a local gateway corresponding to the identifier of the service area; or wherein so that the receiver receives the service area change information of the user equipment, the receiver is further configured to receive a service area entering notification message indicating that the user equipment enters the service area, and the service area entering notification message comprises an identifier of the service area; and so that the processor performs the policy control for the case in which the user equipment accesses the local network, the processor is further configured to establish a session from the user equipment through a traffic distribution device to a local gateway corresponding to the identifier of the service area, and establishing a session from the user equipment to a public gateway by using the traffic distribution device; or wherein so that the receiver receives the service area change information of the user equipment, the receiver is further configured to receive a service area leaving notification message indicating that the user equipment leaves the service area; and so that the processor performs the policy control for the case in which the user equipment leaves the local network, the processor is further configured to delete the session between the user equipment and the local gateway. ### Claim 24 (depends on 18) The network device according to claim 18, wherein the identifier of the service area corresponds to a service area of the local network, and the service area comprises one or more location areas. ### Claim 25 A base station device, comprising a processor and a transmitter, wherein the processor is configured to generate a system message, wherein the system message comprises an identifier of a service area; and the transmitter is configured to broadcast the system message to user equipment, to notify the user equipment of the service area in which the user equipment is currently located; wherein the identifier of the service area corresponds to the service area of a local network, and the service area comprises one or more location areas. ### Claim 26 A base station device, comprising a receiver and a transmitter, wherein the receiver is configured to receive a service area subscription message sent by a network device, wherein the service area subscription message comprises a list of identifiers of service areas, wherein the list of identifiers of the service areas comprises identifiers of one or more service areas and indicates a base station to send a service area reporting message to the network device after user equipment enters the service area; and the transmitter is configured to send the service area reporting message to the network device after the user equipment enters the service area.