A user plane function (UPF) receives, from a session management function (SMF), a session configuration message. The session configuration message comprises a packet detection rule (PDR) for a group communication session. The PDR comprises a multicast address mapped to a plurality of wireless devices associated with the group communication session. The PDR comprises a forwarding rule for packets associated with the multicast address. Data packets comprising the multicast address are received. Based on the PDR, the data packets are sent to the plurality of wireless devices.