Abstract: Network resource measurement is a challenge for packet switched networks. Currently, many applications, such as video conferencing and streaming audio, require a guaranteed Quality of Service (QoS) to work properly. Ensuring minimum QoS to traffic flows and groups of flows become an important challenge to network designers. In such an environment, resource measurement algorithms are utilized to ensure that admittance of a new flow into a resource constrained network does not violate the service level agreements guaranteed by the network to admitted flows and at the same time to achieve high network utilization. There has been extensive research on network resource measurement techniques. One category is active probing where probing packets are injected into network to measure network resource, such as bottleneck link bandwidth, available bandwidth. In this presentation, we show how to extend unicast resource measurement techniques to multicast environment to estimate bottleneck link bandwidth. We show that path segment measurement is more suitable to multicast environment, more robust than full path measurement, and reduces error probability of estimating network resources. We also introduce a novel way to measure end-to-end queuing delay by using a pair of packets with different priorities. The approach is edge-based scheme. Measurements are made at each potential receiver at the network edge, and can be easily implemented in various networks. We have evaluated and compared various existing resource measurement approaches through a set of OPNET simulation experiments.

Brief Biography of the Speaker:
TAREK N. SAADAWI is a Professor of Electrical Engineering, City University of New York, City College and director of the Center of Information Networking and Telecommunications (CINT). He has published extensively in the area of mobile ad-hoc wireless networks and multimedia networking, and co-authored a text book “Fundamentals of Telecommunications Networks,” John Wiley and Sons, 1994. He’s organizing and chairing the forthcoming conference on Cyber Infrastrucuture Protection (CIP), June 8-9. 2011, www.ccny.cuny.edu/cip He is a former Chairman of IEEE Computer Society of New York City, received IEEE Region 1 Award, and is a co-founder of IEEE Symposium on Computers and Communications (which is in its 15th series, www.comosoc.org/iscc ). Dr Saadawi and has been invited and joined US Dept of Commerce Delegation to the Government of Algeria to address rural communications. He also led a group of US experts to provide a telecommunications master plan for the Government of Egypt under US AID funding. Dr. Saadawi is a Member of the Consortium Management Committee for the Army Research Lab (ARL) Consortium on communications and networks; known as the Collaborative Technology Alliances on Communications and Networks.