LTE data traffic during VoLTE call in NSA

Hi Experts.

In NSA configuration, during data traffic, initially it is splitted on NR and LTE. When VoLTE call starts, data traffic continues only on LTE and after the call it comes back on EN-DC.

Now the question: if there is any carrier aggregation in LTE, this is present during both VoLTE call and after call?

In my network I can see CA is released during the call and throughput decreases so much!

What is the right behavior?


With VoLTE call over MCG it’s seen UE can skip SCG addition but ideally it should not impact CA at MCG leg.

It is recommended not to have CA during VoLTE each supplier having feature which restrict CA during VoLTE.