Multiplex communications – Wide area network – Packet switching
Patent
1988-01-26
1989-10-17
Olms, Douglas W.
Multiplex communications
Wide area network
Packet switching
370 60, H04J 324
Patent
active
048752088
ABSTRACT:
Herein disclosed is a communication network, in which two terminal nodes transmit and receive messages containing a destination node discriminator and a source node discriminator by way of a communication route composed of at least one relay node and a plurality of information links connecting the terminal nodes and the relay node. In this communication network, the relay node is stored in advance, in accordance with the combination of a destination node and a source node, with both the information link for transmitting the messages received and the flag information indicating the establishment of the communication route from said source node to the relay node itself. When any of the terminal nodes designates the other terminal node as the destination node and transmits the control message for the communication route establishment to the destination node, the relay node having received the control message sets the flag information, which corresponds to the combination of the source node and the destination node, in a state indicating the link establishment, and transmits said received message to said information link in case the information link corresponding to said combination is in the connected state. The relay node on the communication route transmits the control message to an adjacent node, when it detects the state change of the adjacent information link, under a condition that the flag information corresponding to said information link is in the set state.
REFERENCES:
patent: 4433411 (1984-02-01), Gefroerer et al.
patent: 4507777 (1985-03-01), Tucker et al.
patent: 4745593 (1988-05-01), Stewart
Furuhashi Koshi
Furuya Masakazu
Kashio Jiro
Kawatobi Tatsuo
Kouyama Sinichi
Hitachi , Ltd.
Jung Min
Olms Douglas W.
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