A communication system is provided for implementing a wireless packet broadcast or multicast service. The system includes at least one Radio Access Network (RAN) for communicating with a first UE over a first wireless interface and a General Packet Radio Service (GPRS) Support Node (SGSN) for communicating with the RAN over a second wireless packet interface. A gateway GPRS support node (GGSN) is provided for communicating with the SGSN over a third wireless packet interface and for communicating with external packet-switched networks. A UE Broadcast/Multicast (UEBM) session manager is also provided, which is configured to provision a wireless packet broadcast or multicast service initiated by the first UE.