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Transmission method for control information in communication network

  • US 4,875,208 A
  • Filed: 01/26/1988
  • Issued: 10/17/1989
  • Est. Priority Date: 03/06/1987
  • Status: Expired due to Term
First Claim
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1. A method for transmitting control information in a communication network having a plurality of nodes comprising:

  • a first step of sending out from a message source node a first control message including a destination node discriminator and a source node discriminator for establishing a communication route between a message destination node and the message source node to an information link determined in accordance with said destination node discriminator;

    a second step of operating a relay node on said communication route having received said first control message to set route flag means corresponding to the communication route defined by the source node discriminator and destination node discriminator of said first control message, at a first state which indicates that the route from said source node to said relay node has been established, and to relay said first control message to an information link determined in accordance with said communication route; and

    a third step of operating said relay node when said relay node detects that the condition of the information link connected to said relay node has changed, to send out a second control message for informing an adjacent node of the change in condition of said communication route detected by the relay node if said route flag means corresponding to the communication route composed partially of said information link indicates said first state.

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