A method performed by a wireless communication device for a cellular communications system , the method comprising: operating , together with a first base station , to be configured for Carrier Aggregation, CA, with a Primary Cell, PCell, served by the first base station and a Secondary Cell, SCell, served by a second base station ; operating , together with the first base station , to configure a first Data Radio Bearer, DRB, associated to a first logical channel and a second DRB associated to a second logical channel; receiving a first parameter that indicates that transmission for the first logical channel that is associated to the first DRB is restricted to the SCell and a second parameter that indicates that transmission for the second logical channel that is associated to the second DRB is restricted to the PCell ; receiving an uplink, UL, grant for the SCell ; selecting first data only from the first logical channel that is associated to the first DRB for transmission using the UL grant for the SCell in accordance with the first and second parameters; transmitting the selected first data on the SCell in accordance with the UL grant for the SCell ; receiving a dynamic indication that the SCell is deactivated for the wireless communication device ; receiving a UL grant for the PCell ; selecting second data from either the first logical channel that is associated to the first DRB or the second logical channel that is associated to the second DRB for transmission using the UL grant for the PCell , regardless of the first and second parameters; and transmitting the selected second data on the PCell in accordance with the UL grant for the PCell . operating , together with a first base station , to be configured for Carrier Aggregation, CA, with a Primary Cell, PCell, served by the first base station and a Secondary Cell, SCell, served by a second base station ; operating , together with the first base station , to configure a first Data Radio Bearer, DRB, associated to a first logical channel and a second DRB associated to a second logical channel; receiving a first parameter that indicates that transmission for the first logical channel that is associated to the first DRB is restricted to the SCell and a second parameter that indicates that transmission for the second logical channel that is associated to the second DRB is restricted to the PCell ; receiving an uplink, UL, grant for the SCell ; selecting first data only from the first logical channel that is associated to the first DRB for transmission using the UL grant for the SCell in accordance with the first and second parameters; transmitting the selected first data on the SCell in accordance with the UL grant for the SCell ; receiving a dynamic indication that the SCell is deactivated for the wireless communication device ; receiving a UL grant for the PCell ; selecting second data from either the first logical channel that is associated to the first DRB or the second logical channel that is associated to the second DRB for transmission using the UL grant for the PCell , regardless of the first and second parameters; and transmitting the selected second data on the PCell in accordance with the UL grant for the PCell . <EOS>