Method and apparatus for a packet-switched network communication

Multiplex communications – Wide area network – Packet switching

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370 94, 379136, H04Q 1104, H04J 324

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active

047759739

ABSTRACT:
Disclosed is a communications measurement matrix display for a protocol analyzer which is used to monitor traffic on a packet-switched network. The display allows the protocol analyser user to see, at a glance, a complete and accurate overview of communications between more than thirty-one nodes on a packet-switched network, over a user selectable range of measurement-time intervals. The matrix display has two modes. One mode shows the source versus the destination nodes of the network as a 32-.times.-32 two-dimensional X-Y grid matrix having thirty one source nodes ordinally indicated along one grid axis and thirty one destination nodes ordinally indicated along the other grid axis. The thirty second ordinal position on each axis designates any nodes other than the first thirty one nodes. A display marker postioned on the grid indicates communication between the source node and the destination node which correspond to the (X,Y), that is, the (SOURCE, DESTINATION), coordinates of the marker. In a second mode, the display shows the node connections only: the display is simply a 32-.times.-32 two-dimensional X-Y grid having thirty two nodes ordinally indicated on each axis without direction, such as source or destination, indicated. The display of the second mode is essentially the display of the first mode folded onto itself. The matrix display, in both modes, is particularly well suited to the IEEE 802.3 Local Area Network packet-switched network. The matrix display is accomplished usng a combination of dedicated hardware and real-time software.

REFERENCES:
patent: 3721769 (1973-03-01), Krock et al.
patent: 4072825 (1978-02-01), McLay et al.
patent: 4139903 (1979-02-01), Morrill
patent: 4250354 (1981-02-01), Karras
Jensen, et al., "A Protocol Analyzer for Local Area Networks", Hewlett-Packard Journal, vol. 37, No. 7, Jul. 1986, pp. 42-48.
Shoch, John F.; Hupp, Jon A., "Measured Performance of an Ethernet Local Area Network", Communications of the Association for Computing Machinery (ACM), vol. 23, No. 12, Dec. 1980, pp. 711-727.
Hewlett-Packard Co., Colo. Telecom. Div., "HP 4971A Protocol Analyzer Hardware Support Manual", Feb. 1986.

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