Question about VoLTE GBR Service.
Say we have a cell with 20 VoLTE users all in good RF conditions working fine and PRB occupancy close to 100%.
Suddenly all 20 UEs will move in bad RF so each UE requiring more PRBs due to lower MCS.
I expect no more users admitted on the cell due to not enough GBR resources.
But happens with those 20 existing users that need more PRBs?
Will they use same PRB with a lower quality, reducing codec maybe?
What if codec cannot be changed during call, what happens in this case?
Will cell start to drop VoLTE calls, one by one?
How each vendor is acting in this case?
I know CCO module of SON in this case can shift users to other layers or neighbour cells. But what happens without SON?