Impact of Multilevel Hierarchies on Performance of Wireless Peer-to-Peer Group Communication

Multimedia group communication services in mobile networks as a replacement for traditional trunked radio communication have attracted a lot of attention recently. This paper presents results from a newly developed simulation model to study the transfer of multimedia streams in group communication systems within different setups. As the real time ability of such a system has been identified as the key success feature, the focus of the presented studies is placed on the variation of the users´ upload data rate, the resulting overlay network structure and it´s impact on the overall transfer delay.