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|1. (WO2017156668) COMMUNICATIONS METHOD, CORE NETWORK DEVICE, AND CONTROLLER DEVICE|
|Applicants:||HUAWEI TECHNOLOGIES CO., LTD.
|Title:||COMMUNICATIONS METHOD, CORE NETWORK DEVICE, AND CONTROLLER DEVICE|
The present invention provides a communications method, a core network device, and a controller device. The method comprises: a core network device sends a query message to at least one controller device, the query message carrying an identifier of a user equipment (UE) and being used for instructing the controller device to determine, according to the identifier of the UE, whether the UE is located in a cell range covered by the controller device; the core network device receives a confirmation message sent by a first controller device, the confirmation message being used for indicating that the UE is located in a cell range covered by the first controller device, wherein the first controller device is one of the at least one controller device. By means of the method provided by embodiments of the present invention, a core network device does not need to send a paging message to all base stations in a TAI List of a UE, thereby saving air interface resources when paging the UE, and improving the paging efficiency of the UE.