US Patent No. 10,694,571

SERVICE PROCESSING METHOD AND SERVICE PROCESSING APPARATUS


Patent No. 10,694,571
Issue Date June 23, 2020
Title Service Processing Method And Service Processing Apparatus
Inventorship Xiaobo Wu, Shanghai (CN)
Weiwei Chong, Shanghai (CN)
Assignee Huawei Technologies Co., Ltd., Shenzhen (CN)

Claim of US Patent No. 10,694,571

1. A service processing method, comprising:receiving, by an access network device, from a core network device, a bearer setup request message of a voice over long term evolution (VoLTE) service;
determining, by the access network device, that the terminal is in a weak coverage area of the access network device;
sending, by the access network device through the core network device, a radio resource not available indication to an interne protocol multimedia subsystem (IMS);
sending, by the IMS according to the radio resource not available indication, a message which triggers the terminal to initiate a circuit switched fallback call to the terminal; and
canceling, by the IMS according to the radio resource not available indication, the VoLTE service of the terminal.