It can be either. You can have multiple antennas pointing to a single Base station or each antennas having their own base station. It all depends on the use case. Challenge is when you go from Home to Roaming and vice versa as the handsoff isn't ideal but this'll improve
Or did you actually mean "cellular"? Mesh indicates a deployment where not all access points have a backbone connection. Cellular indicates a deployment where all access points have a backbone connection.