How bearer level charging differ from service level charging ?

Question

I am curious to know in what way operator would like to charge voice calls by using VoLTE ?
Is bearer level charging or application level charging ?

Answer 1

Charging can be done at bearer level or at service level. Each bearer can have multiple Service data flows. Each SDF can having same or different Rating group. If SDFs in a bearer has same rating group, then charging can be done at bearer level. If rating group for SDFs in a bearer are different, then charging is done per SDF/ service level.