Title of Dissertation: PERFORMANCE MANAGEMENT IN ATM NET-

ATM is representative of the connection-oriented resource provisioning class of protocols. The ATM network is expected to provide end-to-end QoS guarantees to connections in the form of bounds on delays, errors and/or losses. Performance management involves measurement of QoS parameters, and application of control measures (if required) to improve the QoS provided to connections, or to improve the resource utilization at switches. QoS provisioning is very important for real-time connections in which losses are irrecoverable and delays cause interruptions in service. QoS of connections on a node is a direct function of the queueing and scheduling on the switch. Most scheduling architectures provide static allocation of resources (scheduling priority, maximum buffer) at connection setup time. End-to-end bounds are obtainable for some schedulers, however these are precluded for heterogeneously composed networks. The resource allocation does not adapt to the QoS provided on connections in real time. In addition, mechanisms to measure the QoS of a connection in real-time are scarce. In this thesis, a novel framework for performance management is proposed. I