This paper proposes a run-time monitor and bandwidth assignment scheme for delay-sensitive traffic in ATM (asynchronous transfer mode) network. The traffic monitor function is thought to be indispensable to support the QoS (quality of services) of the accepted calls and carry out the network resource management efficiently at the same time. The proposed scheme monitors user data cells by its counter which is driven by system clocks and makes a report on the monitor results to the upper plane such as control plane or network management plane. This feature makes it possible to do the run-time bandwidth assignment and can moderately reduce the size of cell buffers which is inevitable to observe input cell rates in existing traffic controls. Furthermore, any processing delays resulting from usage parameter controls can also be eliminated. The proposed scheme is conformed to efficiently manage the calls and reliably improve the overall system performances without a drop in QoS by computer simulations.
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