Advanced quality of service management for next generation internet

Future computer networks, including the Next Generation Internet (NGI), will have to support applications with a wide range of service requirements, such as real-time communication services. These applications are particularly demanding since they require performance guarantees expressed in terms of delay, delay jitter, throughput and loss rate bounds. In order to provide such quality-of-service (QoS) guarantees, the network must implement a Resource Reservation mechanism for reserving resources such as bandwidth for individual connections. Additionally, the network must have an Admission Control mechanism, for selectively rejecting some QoS-sensitive flow requests based on resource availability or administrative policies. The Server and Agent based Active network Management (SAAM) is a network management system designed to meet the requirements of NGI. In SAAM, emerging services models like Integrated Services (IntServ) and Differentiated Services (DiffServ), and the classical Best Effort service are concurrently sharing network resources. This thesis develops and demonstrates in SAAM a novel resource management concept that addresses the difficulties posed by QoS networks. With the new resource reservation and admission control approaches, the sharing mechanism is dynamic and adapts to network load. It ensures high resource utilization while meeting QoS requirements of network users.http://archive.org/details/advancedqualityo109452827Portuguese Navy authorApproved for public release; distribution is unlimited