Multiplex communications – Wide area network – Packet switching
Patent
1992-03-31
1994-08-30
Chin, Wellington
Multiplex communications
Wide area network
Packet switching
370 851, 371 33, H04J 324, H04J 302, H04L 118
Patent
active
053434757
ABSTRACT:
A multiplex transmission system of this invention includes a plurality of multiplex nodes interconnected by a common multiplex transmission line. A plurality of groups of different combinations of the multiplex nodes are predetermined, and a frame of data is transmitted among the multiplex nodes through the multiplex transmission line. The data frame includes a group specifying area specifying a group of nodes from which an acknowledge signal is to be returned. When a data frame transmitted from a sending node is received, each multiplex node determines whether or not it belongs to the group specified by bits in the group specifying area of the transmitted frame. When the data frame is properly received, only those multiplex nodes which belong to the specified group return the acknowledge signals to an acknowledge signal area in the data frame in accordance with the bits in the group specifying area, whereby the transmission efficiency is improved.
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Hirano Seiji
Matsuda Yutaka
Moriue Hiroo
Nobutoki Yoshikazu
Sakamoto Hiroaki
Chin Wellington
Mazda Motor Corp.
Patel Ajit
The Furukawa Electric Co. Ltd.
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