Characterising the Worst Traffic Profile Passing Through an ATM-UNI [chapter]

Andreas Skliros
1995 Performance Modelling and Evaluation of ATM Networks  
Broadband networks (B-ISDN) based on the ATM technology are designed to support a wide variety of services characterised by heterogeneous ATM traffic descriptors and Ouality of Service (OoS) parameters. According to the ATM-Forum User Network Interface Specification, an ATM connection can be characterised by four parameters, the Peak Cell Rate, the Cell Delay Variation tolerance, the Sustainable Cell Rate and the Burst tolerance. User Parameter Control and Connection Admission Control
more » ... should consider all the above traffic parameters for effective network management. However, there is a large number of traffic patterns that can be characterised by the same four parameters. Supposing that no additional information is known about the traffic profiles of the incoming streams, the CAC mechanisms should consider the worst traffic profiles, so that the ATM network will be able to efficiently allocate resources and satisfy its OoS commitments. This paper evaluates the worst traffic profile of an ATM connection which is characterised by four parameters. Such a traffic stream can pass through the Leaky Bucket pOlicing algorithms of an ATM UNI as conformant and have the worst implications on the ATM networks performance. The mean and squared coefficient of variation of the inter-cell times of the worst traffic profile are estimated and the statistical behaviour of the traffic pattern is modelled by the Generalised Geometric distribution.
doi:10.1007/978-0-387-34881-0_5 fatcat:oizqhwxtbfe27bbztv7vjexqrq