China Mobile and Huawei jointly opened up EPS fallback voice and video calls based on 5g independent Networking (SA) in Beijing Information Port for the first time. In this call, the 5g core network and IMS network are deployed in different places. The networking mode conforms to the networking specification of the mobile group scale test, and is consistent with the commercial network architecture and business process, which marks that the 5g end-to-end business process of China Mobile has entered a new stage.

In 5g network voice service, EPS fallback scheme allows 5g terminals to reside in 5g network, but provide voice service on 4G network. When the terminal initiates a voice call, the network switches the terminal to the 4G network through the EPS fallback process, and provides voice services through volte.

The successful test conducted by China Mobile and Huawei shows that voice call, as the basic business in 5g communication, has gradually matured for commercial use. 5g will support new types of services such as Super bandwidth, ultra-low delay and super large connection. Voice is still an indispensable and important service.

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