High Definition Video Call Verification
The results show that, based on the 5G VoNR voice scheme and the 4G voice drop-back scheme, the voice between the 4G/5G networks can achieve a smooth and lossless switchover, and after the voice falls back to 4G, the machine can be hung up or dialed back to 5G quickly.
So far,China MobileBased on 5G scale test, the basic functions of 5GC, 4G/5G interoperability and 5G voice scheme of single manufacturer have been verified. Voice scheme is one of the important foundations of 5GSA. The successful verification further accelerated the development of related industries and the mature commercial use of 5GSA.