Control device for transmission of supervisory control data in vehicle

• US 5,418,721 A
• Filed: 02/22/1994
• Issued: 05/23/1995
• Est. Priority Date: 02/23/1993
• Status: Expired due to Fees

• Current Assignee: Yazaki Corporation
• Original Assignee: Yazaki Corporation
• Inventors: Ogasawara, Kazuyoshi, Arai, Youichi
• Primary Examiner(s): Teska, Kevin J.
• Assistant Examiner(s): NGUYEN, TAN QUANG
• Application Number:
  US08/199,886
• Time in Patent Office: 455 Days
• Field of Search: 364/424.04, 364/431.11, 364/431.12, 364/709.06, 364/131, 364/133, 364/138, 364/514, 395/200, 371/20.1, 371/22.5, 371/30, 371/48, 371/68.1, 240/825.05, 240/825.06, 370/85.1, 370/95.2, 307/10 R
• US Class Current: 701/35
• CPC Class Codes: B60R 16/0315 using multiplexing techniques multiplexing for transmission of signals G08C15/00; multiplexing for electrical communication in general H04J
• CPC Class Codes: H04L 12/4135 using bit-wise arbitration
• CPC Class Codes: H04L 2001/0093 Point-to-multipoint
• CPC Class Codes: H04L 2012/40273 the transportation system being a vehicle
• CPC Class Codes: H04L 25/493 by transition coding, i.e. the time-position or direction of a transition being encoded before transmission

Abstract

A data transmission control device is provided for each of a plurality of units for controlling transmission of supervisory control data. Each control device includes a data error checking unit which causes a data reception unit to transmit a response signal when an error has been detected in the data by the data error checking unit. If a response signal detecting section in the transmitting unit detects a response signal, a data transmission unit resends the common data.

Claims

1. A data transmission control device for controlling a transmission of supervisory control data between a plurality of units in a vehicle, wherein said data transmission control device is contained in each of said units which are respectively connected to a plurality of supervisory control equipments, said control device in each unit comprising;

a data transmission controlling section for controlling a data transmission to another unit;

a data reception controlling section for controlling a data reception from another unit;

a response signal detecting section for detecting a response signal sent from another unit; and

a data error checking section for checking whether there is any error in the transmitted data from another unit, wherein if a data to be transmitted between two different units is a common data for a plurality of units, said data reception controlling section in a data receiving unit transmits a response signal only when said data error checking section therein has detected an error, and said data transmission controlling section in a data sending unit resends the common data when said response signal detecting section therein has detected a response signal from said data receiving unit.

2. A data transmission control device as claimed in claim 1, wherein said data reception controlling section in said data receiving unit sends a response signal to said data sending unit also when said data reception controlling section has detected an error in the address number of said data receiving unit itself.