Method and device for the transmission of data between stations of a communications network, in particular for motor vehicles

• US 5,101,198 A
• Filed: 02/22/1990
• Issued: 03/31/1992
• Est. Priority Date: 02/22/1989
• Status: Expired due to Term

• Current Assignee: Automobiles Citroen (Stellantis NV), Automobiles Peugeot (Stellantis NV)
• Original Assignee: Automobiles Citroen (Stellantis NV), Automobiles Peugeot (Stellantis NV)
• Inventors: Malville, Joel, Herbault, Patrick, Abou, Bruno
• Primary Examiner(s): Yusko, Donald J.
• Assistant Examiner(s): Magistre, Dervis
• Application Number:
  US07/483,066
• Time in Patent Office: 768 Days
• Field of Search: 340/825.5, 341/68, 341/69, 341/70, 341/177, 341/178, 341/179, 341/182, 341/55, 341/61, 341/64, 341/102, 371/61, 375/55, 375/87, 307/9.1, 307/10.1, 307/10.8, 360/40, 370/85.1, 370/94.1
• US Class Current: 710/240
• CPC Class Codes: H03M 5/145 Conversion to or from block codes or representations thereof
• CPC Class Codes: H04L 25/49 using code conversion at the transmitter; using predistortion; using insertion of idle bits for obtaining a desired frequency spectrum; using three or more amplitude levels ; Baseband coding techniques specific to data transmission systems spectral shaping H04L25/03828

Abstract

This method is characterized in that the data is encoded in the form of blocks of four bits in five-bit words, three bits (7) of each block being encoded according to the NRZ encoding method and one bit (8), according to the Manchester encoding method.

Claims

1. A method of transmitting data between stations of a communications network using bit-by-bit arbitration access, comprising the steps of:

encoding data for bit-by-bit arbitration as blocks of four bits in five-bit words, three bits of each block being encoded in NRZ code and one bit being encoded in Manchester code; and

transmitting said encoded data.

2. A method according to claim 1, wherein the bit encoded in Manchester code is the last bit of the block.

4. Method according to claim 1, wherein the communication network is used for motor vehicles.

3. A device included in at least one station of a communication network for transmitting data between stations of the communications network using bit-by-bit arbitration access, comprising:

means for transmitting and receiving data, said transmitting and receiving means further including means for encoding data as clocks of four bits in five-bit words, three bits of each block being encoded in NRZ code and one bit being encoded in Manchester code, and means for decoding said encoded data;

means for counting the number of NRZ encoded bits of data received or transmitted by said transmitting and receiving means; and

means for switching said transmitting and receiving means to Manchester encoding-decoding when said counting means detects the transmission or reception of a third NRZ encoded bit in a block of data.