by

DOI: 10.1023/A:1017287914510
Print publication date: 3/1/2000
View article on SpringerLink

by Ho, L. Lawrence

DOI: 10.1023/A:1009423230439
Print publication date: 3/1/2000
View article on SpringerLink

by Stadler, Rolf; Stiller, Burkhard

DOI: 10.1023/A:1009471110024
Print publication date: 3/1/2000
View article on SpringerLink

by Agoulmine, N.; Dragan, D.; Gringel, T.; Hall, J.; Rosa, E.; Tschichholz, M.

As telecommunications and computers evolve, multimedia services are being increasingly deployed over a variety of organizational and technology domains. Customer requirements and the competitive market mean that the delivery of multimedia services at a guaranteed level of quality can play a significant role in differentiating between service providers. In order to meet such quality of service requirements, service providers need to be supported by trouble management capabilities suitable for today’s heterogeneous environment. This paper presents an integrated network and service trouble management system that has been designed for such an environment within the framework of the European ACTS project FlowThru. The FlowThru Service Quality Assurance System has been developed using TINA and TMN concepts and TeleManagement Forum business processes in order to support service providers with the necessary infrastructure, models and mechanisms for automated end-to-end trouble management in a multi-domain environment.

DOI: 10.1023/A:1009419125954
Print publication date: 3/1/2000
View article on SpringerLink

by Bos, Herbert

Network control is decomposed in six parts: switch control, resource partitioning, virtual network building, virtual network control, generic services, and data-path components. Each of these parts can benefit from support for dynamically loadable code, which allows users to extend and customize the basic functionality. This is related to active networks, exept that dynamic code exercises control at the granularity of connections (flows), rather than individual packets and all aspects of network control are explicitly considered. Network resources are recursively partitionable, so that dynamic code is able to control partitions of virtual networks in any way it sees fit. Policing these partitions may occur at varying levels of “strictness”.

DOI: 10.1023/A:1009467009116
Print publication date: 3/1/2000
View article on SpringerLink

by Al-Shaer, Ehab

The successful deployment of next-generation distributed multimedia systems is significantly dependent on the efficient management support that improves the performance and reliability of such applications at run-time. In this paper, we describe an active management framework based on programmable monitoring agents and event-filter-action recursive model. Active management enables users to define reconfigurable and self-directed monitoring tasks that can be automatically customized at run-time in order to track the system behavior. Using this active management framework, the monitoring agents can be programmed to modify their monitoring tasks dynamically based on observed events information, and initiate the appropriate management actions accordingly. This paper also emphasizes the importance of active management for supporting a scalable, highly responsive and nonintrusive distributed management infrastructure. The presented framework, which is referred to as HiFi monitoring system, supports a comprehensive environment including code instrumentation, user subscription, agents administration, event filtering and action service. Examples of using HiFi in managing large-scale distributed multimedia systems are also shown.

DOI: 10.1023/A:1009415025046
Print publication date: 3/1/2000
View article on SpringerLink

by Gutiérrez, Jairo A.; Sheridan, Donald P.; Pillai, R. Radhakrishna

The increasing complexities of modern networks coupled with the popularity of multimedia applications have placed higher demands on network managers. This paper reviews the main requirements and challenges for effective management of multimedia networks, presents a case study of a thin-client-based multimedia system called CSL (Computer-supported Learning System) and proposes a framework for managing such networks. CSL delivers browser-based assessments and other learning materials to thousands of students at the University of Auckland. This type of demand requires more flexible schemes for the management of the network. In the framework proposed, most of the link management information will be kept in a MIB in the network and a very simple MIB will be maintained in the thin client. The MIB in the network is accessible to the network management application, and a lightweight protocol is proposed for updating of the network MIB using an agent at the thin client.

DOI: 10.1023/A:1009462908207
Print publication date: 3/1/2000
View article on SpringerLink

by Stadler, Rolf; Aurrecoechea, Cristina

The paper addresses the problem of designing and realizing manageable multimedia network services. We argue that open interface between the service delivery and the service management systems can be defined using design patterns, i.e., generic object models. As an example, we introduce a generic object model that makes instances of a network service accessible to the management system. The model includes a set of cooperating objects that can be customized for particular service and management requirements. By applying this model to the design of mcast, an ATM multicast service, we enable the management system to monitor and control mcast sessions. To validate our approach, we have implemented mcast and the management functions on two different platforms: (1) on a high-performance emulation platform, which allows us to study the system’s dynamic behavior and scaling properties in various scenarios; (2) on a broadband testbed, on which network services can be fully implemented, including the transport between multimedia devices. We outline a specific technique that allows us to run the same code, without changes, on both platforms.

DOI: 10.1023/A:1009410924137
Print publication date: 3/1/2000
View article on SpringerLink

by Bernstein, Lawrence

DOI: 10.1023/A:1009438023228
Print publication date: 3/1/2000
View article on SpringerLink

by Boutaba, Raouf; Leon-Garcia, Alberto

DOI: 10.1023/A:1009458807299
Print publication date: 3/1/2000
View article on SpringerLink