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The Asynchronous Transfer Mode (ATM) is the widely used packet switching and connection oriented technology that meets diverse services and performance requirements of real time applications using the broadcast. An ATM network is suitable for multimedia services with different traffic flow characteristics and Quality of Services (QoS) requirements. In order to meet the required QoS of each traffic type, some types of priority disciplines are needed in packet switching to increase the utilization of switches in ATM networks. This paper describes a buffer management scheme using two different prioritized service disciplines in order to improve the QoS in terms of cell delay time for each traffic class and to reduce the cell loss rate of loss sensitive class in an ATM network.
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