Abstract: Disclosed in the present application are a method for selecting a location management function and a device, which are used to ensure that, in a 5G location network architecture, a UE can quickly redirect to a location management function (LMF) entity after moving so as to meet high-precision and low-latency location requirements of the 5G location network architecture. The method includes: determining to trigger the updating of an LMF entity, and executing a process of selecting a new LMF entity; and executing a process of redirecting to the new LMF entity.

Abstract: Disclosed in the present application are a method and a device for selecting a local location management function (L-LMF) entity, which are used for ensuring that, under a 5G localization network architecture, UE can use the L-LMF entity of a non-serving RAN node after moving, to satisfy the localization requirements of the 5G localization network architecture for high precision and low time delay. The method includes: upon reception of a localization request message sent by an access and mobility management function (AMF) entity/mobility management entity (MME), starting to execute a process of directing of the UE to the L-LMF entity of a non-serving node; and providing a localization service for the UE by mutually transmitting with the UE a transmission message carrying relevant localization information.

Abstract: Disclosed by the present application are a location management function (LMF) selection method and terminal location service method and device, said method comprising: 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; the mobility management function entity receiving a confirm location response message sent by the second L

Abstract: The present application provides a data transmission method and apparatus, which are used for improving the success rate of transmitting data to a core network device. Said method comprises: a first base station receiving address information about a transmission network layer (TNL) sent by a second base station; the first base station receiving uplink data sent by a terminal device, the uplink data corresponding to a quality of service (QoS) flow; when the uplink data needs to be borne by a default data radio bearer (DRB) of the first base station, and a general packet radio service tunneling protocol (GTP) channel corresponding to the QoS flow is established on the second base station, the first base station establishing a connection with the second base station according to the address information, so as to transmit the uplink data borne on the default DRB to the second base station, and then transmit same to a core network device by means of the GTP channel.