| In this paper we propose the concept of differential availability, a novel way of looking at the QoS based service availability, and describe its implications in traffic provisioning and bandwidth management. The general term of network availability is no longer suitable when it comes to the converging network with different QoS traffic. In the current study, we try to address the issues related to the network providing graded services, by proposing a service-oriented way of looking at the problem. We define the term differential availability based on the QoS service specific constraints, like latency, packet loss, link utilization, and discuss its impacts on the traffic mix and bandwidth allocation. The method is useful in determining the traffic mix for different classes of traffic, defining the Service Level Agreements (SLAs), and for maximizing the network utilization & revenue. |
| Bharathi B. Devi received her Ph.D. from the School of Automation of the Indian Institute of Science, Bangalore, India. She is currently with Lucent Technologies Integrated Solutions in Los Angeles, CA working on the TSAT program as a Chief Network Analyst in the SE&I group. Her previous commercial telecom experience includes system and network design, engineering and architecture in various companies including Fujitsu, MCI and DSC Communications in Dallas, Texas. She also has taught Computer Science as a Visiting Assistant Professor in Texas. Her current research interests include QoS related algorithms & protocols, network & system performance analysis, traffic engineering & capacity planning.
Dr. Devi has published more than forty papers in International journals, refereed conferences, as technical reports, patents, and IEEE book Chapter. She was a reviewer of IEEE Communications Magazine, a book on QoS in IP & ATM networks by Dr. McDysan and has chaired a session on “ATM Switching” in the 7th International Conference on Computer Communication ’98, October 12-15, Lafayette, Louisiana.
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