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Increasing popularity and availability of portable wireless devices, which constitute mobile ad hoc networks, calls for scalable ad hoc routing protocols. On-demand routing protocols adapt well with dynamic topologies of ad hoc networks, because of their lower control overhead and quick response to route breaks. But, as the size of the network increases,(More)
This paper addresses the key issue of providing flexible multimedia presentation with user participation and suggests synchronization models which can specify the user participation during the presentation. One approach that has been suggested by [4] is the Object Composition Petri Nets (OCPN). OCPN is an augmented model of Petri nets with logic of time(More)
Maximizing bandwidth utilization and providing performance guarantees, in the context of multimedia networking, are two incompatible goals. Heterogeneity of the multimedia sources calls for eeective traac control schemes to satisfy their diverse Quality of Service(QoS) requirements. These include admission control at connection set up, traac control at the(More)
Abst?act-Multimedia applications comprise several media streams, which are semantically synchronized at different time instants. The application kehavior is stored along with the multimedia database using representation mechanisms such as OCPN (object composition Petri nets) or dynamic timed Petri nets (DTPN). It is imperative that one translates the(More)
Any performance evaluation study requires a concise description of the workload under which the performance of the system is to be evaluated. Also, the repeatability of the experiments for different workload profiles, requires that the workload models generate the workload profiles parametrically. Such a model, should preferably be time-invariant,(More)
The concept of Virtual Paths (VP) is a powerful technique to improve the transmission eeciency in ATM networks. Transmission ef-ciency can be improved by dynamically changing the bandwidths of the VPs, based on the demand. Intelligent controllers, which predict bandwidth-demand patterns to enable better VP management, have the potential to revolutionize ATM(More)