A method for operating a network entity (BS) for a cellular radio communications network (4) is provided, the method comprising: receiving first multicast/broadcast traffic data; buffering the first multicast/broadcast traffic data; transmitting the first multicast/broadcast traffic data via a first downlink channel (DMCH); receiving a retransmission request via an uplink channel (UFCH); determining second multicast/broadcast traffic data in dependence on the buffered first multicast data and in dependence on the received retransmission request; and transmitting the second multicast/broadcast traffic data via a second downlink channel (DRCH).