Multiplex communications – Wide area network – Packet switching
Patent
1986-03-12
1988-05-24
Olms, Douglas W.
Multiplex communications
Wide area network
Packet switching
370 16, H04J 116, H04J 314
Patent
active
047470976
ABSTRACT:
A multiplex transmission system (100) in which any (N.sub.i) of a plurality of nodes (N.sub.1 -N.sub.n) connected loop-like with a bidirectional signal transmission path (1a, 1b) and each respectively connected to control one of a plurality of units of electrical equipment is adapted for transmitting, in a given order (i), a prepared signal (A.sub.i, D) to the signal transmission path (1a, 1b) and for receiving a prepared signal (A.sub.i, D; A.sub.x, D) from the signal transmission path (1a, 1b), wherein any (N.sub.i) of the nodes (N.sub.1 -N.sub.n) has a rise-timing timer (CNT.sub.2), on which a rise-timing time interval (t.sub.i3, t.sub.i4) of a length proper to this node (N.sub.i) is set at a predetermined time point (54, 62, 71, 84, 88), and is adapted for rising to start signal transmission when the rise-timing timer (CNT.sub.2) has timed out.
The signal transmission path (1a, 1b) includes a pair of signal transmission lines (1a, 1b), and any (N.sub.i) of the nodes (N.sub.1 -N.sub.n) is adapted, when this node (N.sub.i) is at the order of signal transmission of its own, for transmitting the prepared signal (A.sub.i, D) to the signal transmission lines (1a, 1b) and receiving the prepared signal (A.sub.i, D; A.sub.x, D) from one (1a) of the signal transmission lines (1a, 1b) and for checking the signal (A.sub.i ', D') as thus received with the signal (A.sub.i, D) as transmitted, to thereby diagnose for abnormality of the aforesaid one (1a) of the signal transmission lines (1a, 1b).
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Mase Yoshio
Muneyuki Hayato
Nakamura Kazuo
Nishijimi Masaru
Ohya Harutada
Chin Wellington
Honda Giken Kogyo Kabushiki Kaisha
OKI Electric Industry Co., Ltd.
Olms Douglas W.
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