Managing QoS for Multimedia Applications in the Differentiated Services Environment

Authors:
Manish Mahajan;Manish Parashar
Affiliations:
The Applied Software Systems Laboratory (TASSL), Dept. of Electrical and Computer Engineering, Rutgers University, 94 Brett Road, Piscataway, New Jersey 08854/ manishm@caip.rutgers.eduparashar@caip.rutgers.edu
Venue:
Journal of Network and Systems Management
Year:
2003

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Abstract

The overall quality of network connections has a significant impact on the performance of networked applications. As a result, Quality-of-Service (QoS) management for networked multimedia applications over IP is a significant and immediate challenge. While differentiated services (DiffServ) provide a sense of resource allocation and QoS, they do not guarantee QoS. This paper presents the design, implementation and evaluation of a content-aware bandwidth broker (CABB) that manages QoS for multimedia applications in a DiffServ environment. CABB allocates network resources to multimedia flows based on client requirements, the adaptability of the application, and its tolerance to network level parameters such as bandwidth, delay, and latency. It has been implemented and evaluated using the NS-2 simulator toolkit. Evaluations show that CABB improves network resource allocations and increases overall throughput. Furthermore multimedia application flows are better managed and controlled, improving perceived QoS and avoiding possible congestion at core routers.