The invention is directed to a method and to a communication system for handling a packet service with a packet-based core communication network (CNW) and an access communication network (ANW). According to the invention, the transmission of multimedia data in the packet data can be controlled by the edge node (EN) arranged at an interface between the core communication network (CNW) and an access communication network (ANW) and can be integrated into the data transmission from and to the mobile communication device (MS) via the air interface of the access communication network. The advantage of the invention is that the edge node enables an active intervention into the signalling of the transmission of the multimedia data as packet data, i.e., this signalling need no longer ensue transparently to the mobile communication device. Another advantage is that, due to the integration of the control of the multimedia data transmission, the data streams can be adapted better to the radio resources and/or to the demands made of the mobile communication device.