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Data communication system having plural stations connected to a single transmission path

  • US 5,206,937 A
  • Filed: 08/01/1990
  • Issued: 04/27/1993
  • Est. Priority Date: 08/04/1989
  • Status: Expired due to Fees
First Claim
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1. A data management method for controlling the transfer of data in an information communication system in which a plurality of stations are operatively coupled to a same information transmission path and in which frames of data are transmitted among the plurality of stations on the information transmission path, each frame of data including a command region and a relevant data region, said method comprising:

  • a step of analyzing at a receiving station a command region of a frame transmitted by a sending station on said information transmission path to determine if said command region denotes one of a data registration command, a data renewal command or a data transfer command;

    a step of storing in a data memory of said receiving station the relevant data contained in said frame when said command region denotes the data registration command;

    a step of overwriting previously stored relevant data of said sending station stored in said data memory of said receiving station with said relevant data contained in said frame when said command region denotes the data renewal command; and

    a step of transmitting relevant data contents, specified in said frame of data, of said data memory of said receiving station on said information transmission path when said command region denotes the data transfer command.

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