Node apparatus and communication network

Details Node apparatus and communication network Node apparatus and communication network

1989-01-27

1989-12-05

Griffin, Robert L.

Multiplex communications

Wide area network

Packet switching

370 941, 3408255, H04J 302, H04J 324

Patent

active

048857424

ABSTRACT:
A node apparatus is used in a communication network having a hierarchical structure and transmission paths each coupling one node apparatus to another node apparatus or a terminal device. The node apparatus has at least one high order direction port, low order direction ports, and a control unit for controlling the coupling of the high order direction port and the low order direction ports. When signals are transmitted from the terminal devices approximately at the same time, one of the signals which first reaches the node apparatus provided in a highest order layer is broadcasted within the communication network and remaining signals are eliminated.

REFERENCES:
patent: 4347498 (1982-08-01), Lee et al.
patent: 4445171 (1984-04-01), Neches
patent: 4740954 (1988-04-01), Cotton et al.
patent: 4811337 (1989-03-01), Hart
patent: 4814979 (1989-03-01), Neches

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