Interoperability control between heterogeneous ATCs in ATM public networks

In this paper, we describe the necessity of interoperability control between heterogeneous ATM transfer capabilities (ATC) in public networks and propose a service interworking method and a network interworking method for an interoperability control mechanism depending on the closed-loop range of each ATM transfer capability. Additionally, we propose DBR (deterministic bit rate) with backward explicit congestion notification method for the ABR (available bit rate)/DBR interoperability control and the block cell rate re-negotiation with state dependent mechanism for the ABR/ABT (ATM block transfer) interoperability control when DBR and ABT capabilities are implemented in public networks. Also, we analyzed the performance of the proposed interoperability control mechanisms in terms of the maximum queue length and the bandwidth utilization through the simulation