For applications relying on the transfer of multimedia, and in particular continuous media, it is essential that quality of service (QoS) is guaranteed system-wide, including end-systems, communications systems and networks. Although researchers have addressed many isolated areas of QoS provision, little attention has so far been paid to the definition of an integrated and coherent framework that incorporates QoS interfaces, management and mechanisms across all architectural
layers. To address this deficiency, we are developing a Quality of Service Architecture (QoS-A) which offers a framework to specify and implement the required performance properties of multimedia applications over high-performance ATM-based networks.
The QoS-A incorporates the notions of flow, service contract and flow management. Flows characterise the production, transmission and eventual consumption of single media streams, service contracts are binding agreements between users and providers and flow management provides for the monitoring and maintenance of the contracted QoS levels.
This paper provides an overview of the QoS-A and focuses particularly on the role of the transport service and protocol in the architecture. We describe a multimedia enhanced transport service
(METS) and transport layer service contract and show how QoS levels contracted at the transport service interface can be assured in the context of a local ATM network.
Did you find this white paper useful?
20 out of 39 users found this white paper useful
Related white papers
Exceptional Patient Care With a Personal Touch
Maxima Medisch Centrum was created by combining St Joseph Hospital in Veldhoven with Diaconessenhuis (Hospital) in Eindhoven thus forming one of the largest teaching medical centres in The Netherlands with...
MiFi: A Framework for Fairness and QoS Assurance in Current IEEE 802.11 Networks With Multiple Access Points
This paper presents a framework for providing fair service and supporting QoS requirements in IEEE 802.11 networks with multiple access-points (APs). These issues becomes critical as IEEE 802.11 wireless LAN...
Data Centers: Cisco Best Practices for Security and Performance
Network service providers seeking Cisco® Powered Network Program membership must meet rigorous application requirements that, among other things, include network performance, network security, and customer support. Designation also requires an...
Layer 3 Malformed Packet Testing in MCI's Public IP Network
Malformed packets associated with routing protocols can cause undesirable consequences if not detected and contained properly as close to the originator as possible. This issue magnifies in scope and complexity...
Network Intrastructure: Getting Started with VoIP
IP/Ethernet networks are fast becoming an attractive and viable utility for supporting high-quality voice in a converged network. Bringing disparate voice and data systems together into a multi-service network can...
Security Expansion Layers Beyond the Firewall
Your network security can be expanded well beyond your connection to the Internet. Three additional security perimeters now can be leveraged in your security model. Throughout this document,...
Introduction to Quality of Service
This paper will provide an overview of the concept of Quality of Service (QoS), the Integrated Services model and the Differentiated Services model.
