CA Bandwidth Class Definition It means that total aggregated RB should be less than 100 . Following shows some example cases which is allowed and not allowed configuration. Case 1 : PCC = 10 Mhz (max 50 RB), SCC = 10 Mhz (max 50 RB). It would give max aggregated RB is 50 RB +50 RB which is <= 100. So this is allowed.