NETWORK DIMENSIONING AND PERFORMANCE OF MULTISERVICE, MULTIRATE LOSS NETWORKS WITH DYNAMIC ROUTING

In this paper, we address a multiservice, multirate loss network envir onment with dynamic routing, In this setting, we consider multiple tra ffic load periods (multihour) during the day, and by observing network dynamics, we present a network dimensioning model that consists of tw o steps: a bandwidth estimation step, followed by a multicommodity flo w model for multiple services and traffic loads. For network operation s, we discuss a probabilistic admission control policy and three multi service routing schemes, We have used a ten-node network with multiple asymmetric traffic data sets (partially extracted from an actual netw ork) for our study, It was found that the capacity obtained using the analytic network dimensioning model provides a good estimate of networ k capacity required for meeting the grade-of-service goal for each ser vice type in each traffic load period; this observation is based on a simulated network environment that uses the proposed admission control and the dynamic routing schemes, Our observation suggests that it may not be not necessary for the dimensioning model to explicitly incorpo rate admission control policy, but admission control is needed for net work operation to provide desirable grade-of-service.