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Control system for communication between units

  • US 5,077,554 A
  • Filed: 01/12/1988
  • Issued: 12/31/1991
  • Est. Priority Date: 01/12/1987
  • Status: Expired due to Term
First Claim
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1. A communication system for communication between an originating unit and a destination unit through a plurality of relaying units, wherein:

  • said originating unit, said plurality of relaying units and said destination unit are each provided with an adjacent originating address when viewed from a lower adjacent unit in the communication route, and an adjacent destination address when viewed from an upper adjacent unit in the communication route;

    said adjacent originating address being different from said adjacent destination address;

    said adjacent destination address being different from other adjacent destination addresses provided at units connected to said upper adjacent unit for identifying said units;

    said originating unit comprising;

    destination address forming means for forming a destination address for specifying said destination address; and

    signal message sending means, operatively connected to said destination address forming means, for sending a signal message and said destination address to a lower adjacent unit in the communication route in accordance with said destination address;

    said destination address being represented by a set of adjacent destination addresses of all lower units provided on the communication path between said originating units and said destination unit;

    each of said relaying units comprising;

    address receiving means for receiving an originating address and a destination address from an upper adjacent unit adjacent to the unit receiving said message signal; and

    signal message routing means, operatively connected to said address receiving means, for sending said signal message to a lower adjacent unit in the communication route and adjacent to the unit receiving said signal message in accordance with the received destination address;

    said signal message routing means comprising;

    destination determining means, for discriminating whether the received destination address includes data for determining that the unit receiving said signal message is said destination unit when said received destination address includes no data;

    address changing means, operatively connected to said address discriminating means, for changing said received originating address to a new originating address by adding said adjacent originating address to said received originating address and for changing the received destination address to a new destination address by deleting said adjacent destination address of an upper unit adjacent to the unit receiving said message signal from the received destination address; and

    path selecting means for selecting, based on the changed destination address, a path for transferring the changed originating address and the changed destination address to said lower adjacent unit, when said destination address includes any data.

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