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EP0507581A1 Expired / Lapsed EP ⏱️ 0.0 years remaining

Multiplex transmission system

Assignee: Furukawa Electric Co Ltd
•
Filing: 1992-04-02
•
Granted: —
•
Expires: 2012-04-02
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Abstract

Abstract A multiplex transmission system of this invention includes a plurality of multiplex nodes (11-23) interconnected by a common multiplex transmission line (10). A plurality of groups of different combinations of the multiplex nodes (11-14,19,20) are predetermined, and a frame of data is transmitted among the multiplex nodes (11-23) through the multiplex transmission line (10). The data frame includes a group specifying area specifying a group of nodes (11-14,19,20) from which an acknowledge signal is to be returned. When a data frame transmitted from a sending node (20) is received, each multiplex node (11-23) determines whether or not it belongs to the group (11-14,19,20) specified by bits binary code in the group specifying area of the transmitted frame. When the data frame is properly received, only those multiplex nodes (11-14,19,20) 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.

Inventors

  • 👤 Yutaka Matsuda
  • 👤 Yoshikazu Nobutoki
  • 👤 Hiroo Moriue
  • 👤 Seiji Hirano
  • 👤 Hiroaki Sakamoto

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-11-04 11:04
CPC Classifications
H; H04; H04L; H04L12/00; H04L12/28; H04L12/42; H04L1/00; H04L1/12; H04L1/16; H04L1/1607; H04L1/1664; H04L1/0078; H04L1/0083; H04L12/40; H04L12/407; H04L12/413; H04L12/4135; B; B60; B60R; B60R16/00; B60R16/02; B60R16/03; B60R16/0315

Claims Analysis

Total Claims: 6
Claim 1
Independent Claim 125 words
A multiplex transmission system having a plurality of multiplex nodes(11-23) interconnected by a common multiplex transmission line(10) for transmitting a frame of data among the multiplex nodes through the multiplex transmission line(10), characterized in that when a data transmission is properly carried out, an acknowledge signal indicating a proper completion of the data transmission is returned to an acknowledge signal area provided in the frame of data corresponding to the respective multiplex nodes, the frame of data including an identifier which specifies one of groups of predetermined combinations of multiplex nodes(11-14,19,20) from which the acknowledge signal is to be returned, and the multiplex nodes(11-14,19,20) which belong to a specified group returning the acknowledge signal in accordance with the identifier in the transmitted frame of data.
Claim 2
Dependent Claim 32 words
A multiplex transmission system according to claim 1, characterized in that the identifier specifies on a bit-wise basis a group of multiplex nodes(11-14,19,20) from which the acknowledge signal is to be returned.
Claim 3
Dependent Claim 32 words
A multiplex transmission system according to claim 1, characterized in that the identifier specifies by a binary code a group of multiplex nodes(11-14,19,20) from which the acknowledge signal is to be returned.
Claim 4
Dependent Claim 103 words
A multiplex transmission system according to claim 1, 2, or 3 characterized in that each of the multiplex nodes includes memory means(53), which stores data indicating all multiplex nodes(11-23) from which the acknowledge signal is returned in a table corresponding to the respective groups of predetermined combinations of the multiplex nodes, specifies a group of multiplex nodes(11-14,19,20) from which the acknowledge signal is to be returned in accordance with the data stored in the table when a frame of data is transmitted, and returns the acknowledge signal in accordance with the data stored in the table when a frame of data is received.
Claim 5
Dependent Claim 25 words
A multiplex transmission system according to any preceding claim, characterized in that the multiplex nodes(11-23) each belong to one group, or two or more groups.
Claim 6
Dependent Claim 29 words
A multiplex transmission system according to any preceding claim, characterized in that the groups each comprise several or all of the multiplex nodes(11-23) interconnected by the multiplex transmission bus.

References Cited (Backward Citations)

EP0217571A2 Cited
EP0319271A2 Cited

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