An optimum logical ATM network design method guaranteeing multimedia QoS requirements

This paper proposes a new topological design method, named BXCQ, which optimizes logical network configuration while guaranteeing QoS requirements for each service class in an ATM network. The BXCQ method determines the optimum logical network topology associated with each service class so as to minimize network cost. In our previously proposed full-net architecture [Yamanaka et al., 1995], these different logical topologies can be suitably mapped at the same time on the same ATM physical network by using virtual channel handler logical interconnection networks. According to the BXCQ method, the results quantitatively clarify the relations between multimedia traffic characteristics and desirable logical network configurations in the full-net. Evaluation results suggest that a service class that is bursty, delay tolerant and cell loss sensitive with small demand should be supported by a loop-like topology. Furthermore, the results also show that suitably changing logical configurations in accordance with traffic demand fluctuations leads to a dramatic reduction of 8.8% in network cost. This study will be useful for designing flexible and cost-effective multimedia networks that can also adapt to not-yet-known services