are requested to join a dynamically created multicast group the request is send from the upper level router via a standard geographical addressed message to the access routers and intercepted by them after the respective access routers processed the request and joined the multicast group and confirmed it messages for the area are directly send to the ip multicast group all intermediate systems utilize fast standard ip forwarding for the messages making the expensive intersection checks in the intermediate systems unnecessary and enable the network to duplicate the messages as close to the target systems as possible the access routers remove the multicast ip information form the messages and forward them according to their geographical target addresses a multicast group is removed if no messages with the respective target addresses arrive any more for a certain period of time the proposed mechanism is suited for the next generation of services which are related to specific areas so called area based services it is a basic technology deployable in the network infrastructure to speed up the forwarding decisions in intermediate systems with faster decisions the delay for message delivery is also shortened fig2 shows the distribution network with a dynamically established multicast group the following section presents a more detailed explanation of the invention fig3 gives an overview of the dynamic multicast group establishment procedure in the distribution network the explanations in detail 1 a router in the distribution network close to the gateway or the gateway i e upper level router itself.