1TELCOM 2120Comparing Systems via Measurements and RegressionJoseph KabaraDepartment of Information Science and TelecommunicationsUniversity of PittsburghSpring 2008, notes4TELCOM 2120: Network Performance2Four basic types of measurement studiesFour basic types of measurement studies1. Statistical Characterization of metric–Determine: call blocking at telephone switch, utilization of network links, bit error rate on link, etc.2. Compare alternate system designs, equipment or parameter settings–Benchmark routers from different vendors, compare different token rotation times in FDDI ring, compare RAS, etc.Types of Measurement StudiesTypes of Measurement StudiesSpring 2008, notes4TELCOM 2120: Network Performance33. Predicting System Performance3. Predicting System Performance–Throughput and Delay increase if add 5 workstations to an Ethernet switch.–End-to-end delay of virtual private network link in ISP backbone networks.4. Parameterise analytical or simulation model or driving a simulation model –Determining mean call holding times of phone calls −for use in queueing model.–Gather data to use as traffic source in computer simulation model of alternate network topologies.Types of Measurement StudiesTypes of Measurement Studies
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