Multipriority ATM shaping architecture for delay-sensitive services

This paper addresses the problem of efficient traffic shaping while providing QoS guarantees for Constant Bit Rate (CBR) sources. A simulation model is developed to capture the performance of several mechanisms that schedule cells according to the Generic Cell Rate Algorithm which is used for policing of connections. Results show that efficient shaping with QoS guarantees can be only achieved by a multi- level priority scheme. The suggested shaper mechanism absorbs the Cell Delay Variation of CBR cells and minimizes the buffer required at the receiver end.