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Statistics of mixed data traffic on a local area network

1985; Elsevier BV; Volume: 10; Issue: 3-4 Linguagem: Inglês

10.1016/0169-7552(85)90014-5

1879-2324

William T. Marshall, S. Philip Morgan,

Network Time Synchronization Technologies

We have analyzed a week's worth of data traffic on a DATAKIT∗ Virtual Circuit Switch network at AT&T Bell Laboratories. The network includes 5 nodes connecting 22 host computers and 226 terminals, with trunks to nodes elsewhere at Bell Laboratories. Users are predominantly researchers using the UNIX† operating system via teletypewriter terminals and diskless work stations at 9.6 kb/s. Comparable fractions of the traffic are generated by terminal-to-host calls, by indirect logins, by inteactive remote command executions, and by host-to-host file transfers. We display histograms representing the distributions of interarrival times and call lenghts associated with the various types of callsm and the distributions of transmissions bursts in individual calls. We characterize typical distributions by their means and coefficients of variation, and propose a model for time-sharing traffic which depends on a relatively small number of parameters and statistical distributions.