# US 2020/0288379 A1 · Information transmission method, network device, and terminal device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2020/0288379 A1 - Document ID: US20200288379A1 - Status: Published application - Kind: A1 - Application number: 16/879,582 - Filed: 2020-05-20 - Published: 2020-09-10 - Earliest claimed: 2017-11-21 - Assignees: Guangdong Oppo Mobile Telecommunications Corp., Ltd. - Applicants: Guangdong Oppo Mobile Telecommunications Corp., Ltd. - Inventors: Hai Tang - Web page: https://patentgrep.com/patent/US20200288379A1 ## CPC - H04W 48/12: using downlink control channel - H04W 48/18: Selecting a network or a communication service - H04W 8/08: Mobility data transfer - H04W 48/08: Access restriction or access information delivery, e.g. discovery data delivery (signalling during connection H04W76/00) - H04W 48/14: using user query {or user detection} - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) ## Abstract Embodiments of this application disclose an information transmission method, a network device, and a terminal device, thereby helping reduce signaling overheads. The method includes: determining, by a network device, a target policy corresponding to a terminal device according to current time information and/or position information of the terminal device; and sending, by the network device, the target policy to the terminal device. ## Claims ### Claim 1 An information transmission method, comprising: obtaining, by a network device, position information of a terminal device from an access and mobility management function (AMF), wherein the position information comprises at least one of: a presence reporting area (PRA) defined in the 3rd Generation Partnership Project (3GPP), at least one tracking area identity (TAI), at least one registration area identity (RAI), or geographical position information from global positioning system (GPS) positioning; determining, by the network device, a target policy corresponding to the terminal device according to the position information of the terminal device; and sending, by the network device, the target policy to the terminal device. ### Claim 2 (depends on 1) The method according to claim 1, wherein the target policy comprises a wireless local area network selection policy (WLANSP) and/or a user equipment route selection policy (URSP). ### Claim 3 (depends on 2) The method according to claim 2, wherein the target policy comprises at least one rule in the WLANSP and/or at least one rule in the URSP. ### Claim 4 (depends on 1) The method according to claim 1, wherein the network device is a policy control function (PCF) entity. ### Claim 5 (depends on 1) The method according to claim 1, further comprising: if the position information of the terminal device changes, determining, by the network device, an updated target policy according to changed position information of the terminal device, and sending the updated target policy to the terminal device. ### Claim 6 (depends on 1) The method according to claim 1, wherein the target policy is used to indicate a parameter used by the terminal device to select a network or establish a protocol data unit (PDU) session. ### Claim 7 A network device, comprising a processor, a memory, a transceiver, and one or more programs stored in the memory that, when executed by the processor, cause the network device to: obtain position information of a terminal device from an access and mobility management function (AMF), wherein the position information comprises at least one of: a presence reporting area (PRA) defined in the 3rd Generation Partnership Project (3GPP), at least one tracking area identity (TAI), at least one registration area identity (RAI), or geographical position information from global positioning system (GPS) positioning; determine a target policy corresponding to the terminal device according to the position information of the terminal device; and send, via the transceiver, the target policy to the terminal device. ### Claim 8 (depends on 7) The network device according to claim 7, wherein the target policy comprises a wireless local area network selection policy (WLANSP) and/or a user equipment route selection policy (URSP). ### Claim 9 (depends on 8) The network device according to claim 8, wherein the target policy comprises at least one rule in the WLANSP and/or at least one rule in the URSP. ### Claim 10 (depends on 7) The network device according to claim 7, wherein the network device is a policy control function (PCF) entity. ### Claim 11 (depends on 7) The network device according to claim 7, wherein the network device is further configured to: if the position information of the terminal device changes, determine an updated target policy according to changed position information of the terminal device; and send, via the transceiver, the updated target policy to the terminal device. ### Claim 12 (depends on 7) The network device according to claim 7, wherein the target policy is used to indicate a parameter used by the terminal device to select a network or establish a protocol data unit (PDU) session. ### Claim 13 A non-transitory computer readable storage medium having stored thereon computer instructions that, when executed by a network device, causes the network device to perform a plurality of operations including: obtaining position information of a terminal device from an access and mobility management function (AMF), wherein the position information comprises at least one of a presence reporting area (PRA) defined in the 3rd Generation Partnership Project (3GPP), at least one tracking area identity (TAI), at least one registration area identity (RAI), and geographical position information from global positioning system (GPS) positioning; determining a target policy corresponding to the terminal device according to the position information of the terminal device; and sending the target policy to the terminal device. ### Claim 14 (depends on 13) The non-transitory computer readable storage medium according to claim 13, wherein the target policy comprises a wireless local area network selection policy (WLANSP) and/or a user equipment route selection policy (URSP). ### Claim 15 (depends on 14) The non-transitory computer readable storage medium according to claim 14, wherein the target policy comprises at least one rule in the WLANSP and/or at least one rule in the URSP. ### Claim 16 (depends on 13) The non-transitory computer readable storage medium according to claim 13, wherein the network device is a policy control function (PCF) entity. ### Claim 17 (depends on 13) The non-transitory computer readable storage medium according to claim 13, wherein the plurality of operations further comprise: if the position information of the terminal device changes, determining, by the network device, an updated target policy according to changed position information of the terminal device, and sending the updated target policy to the terminal device. ### Claim 18 (depends on 13) The non-transitory computer readable storage medium according to claim 13, wherein the target policy is used to indicate a parameter used by the terminal device to select a network or establish a protocol data unit (PDU) session.