Pillai Radhakrishna
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Publication PVC management system for the Singapore national high-speed ATM testbed(1997-12-15) Pillai, R.R.; Biswas, J.; INSTITUTE OF SYSTEMS SCIENCEThe Singapore national high-speed ATM testbed and some of the management issues are highlighted in this paper. In order to achieve inter-operability between different vendor's ATM equipment, it is often necessary to create Permanent Virtual Circuits (PVCs). The design and implementation of a PVC management system for the testbed is reported. It uses TCP/IP protocol for management information exchange and a tree based topology is employed to monitor the PVC information across the testbed. It is a generic model which could also be used for other service management related applications. © 1997 Elsevier Science B.V.Publication Optimal scheduling for balancing buffer occupancy at an ATM access point(1997) Pillai, R.Radhakrishna; Mukherji, Utpal; INSTITUTE OF SYSTEMS SCIENCEThe scheduling at an ATM access point is modelled as a stochastic control problem and optimal scheduling policy is obtained for equalizing input buffer contents in the case of two inputs with unequal arrival rates. The optimal policy is work conserving, and it serves the longer queue when the queue lengths are unequal and serves the queue with larger arrival rate when the queue lengths are equal. In the case of 0-1 arrival processes, some sample path wise results are obtained.Publication A Model and APIs for Service Management on an ATM Network(1997) Biswas, J.; Pillai, R.R.; INSTITUTE OF SYSTEMS SCIENCEThe architectural reference point for our work is a reference model which associates functionality with operational planes along three orthogonal abstracted models. Within the context of this reference model a service management model is proposed. The model makes use of APIs for communicating management information between a management application and service entities distributed in an ATM network. The APIs are based upon native ATM APIs that are similar to those that have recently been adopted by the ATM Forum. The viability of the model is demonstrated by building ATM multimedia services with service management capabilities. The model and the APIs have been applied to services executing in a national ATM network. Although the work is motivated by an ATM network, the service management model is general, and may be applied to other networks as well. Some open issues in service management are brought out.