Method of data transmission and a transmission and reception device therefor

• US 7,203,776 B2
• Filed: 12/16/2002
• Issued: 04/10/2007
• Est. Priority Date: 12/14/2001
• Status: Expired due to Fees

• Current Assignee: Robert Bosch GmbH
• Original Assignee: Robert Bosch GmbH
• Inventors: Haensel, Jens, Junger, Andreas, Lueders, Uwe, Moritz, Rainer, Kostorz, Wolfgang, Elbracht, Berthold, Thuss, Wolfgang
• Primary Examiner(s): AUVE, GLENN ALLEN
• Application Number:
  US10/320,023
• Publication Number:
  US 20030172204A1
• Time in Patent Office: 1,576 Days
• Field of Search: 710/52, 710/62, 710/63, 710/34, 710/35, 710/38, 710/72, 710/106, 710/310
• US Class Current: 710/57
• CPC Class Codes: G01S 13/931 of land vehicles
• CPC Class Codes: G01S 2013/93274 on the side of the vehicles
• CPC Class Codes: G01S 2013/93275 in the bumper area
• CPC Class Codes: H04L 1/16 in which the return channel carries supervisory signals, e.g. repetition request signals
• CPC Class Codes: H04L 12/44 Star or tree networks
• CPC Class Codes: H04L 47/10 Flow control; Congestion control
• CPC Class Codes: H04L 47/266 Stopping or restarting the source, e.g. X-on or X-off

Abstract

A data transmission method and a transmission/reception device are described, the data transmission taking place via intermediate memories without the transmitter receiving direct feedback from the receiver regarding the success of the data transmission. Furthermore, at least one transmission and/or reception device is described which forms an interface between at least two control units and has intermediate memories.

Claims

1. A method of data transmission between a first control unit and a second control unit, comprising:

transmitting data from the first control unit to the second control unit; and

causing one of the first control unit and the second control unit serving as a transmitting unit to determine that an unsuccessful data transmission operation to a receiver has occurred due to further transmission of data being no longer possible after transmitting a certain number of data, wherein no communication is sent from the receiver acknowledging that the unsuccessful transmission has occurred.

2. The method as recited in claim 1, wherein:

memories in which transmitted data are stored are provided in the first control unit and the second control unit in a transmission path.

3. The method as recited in claim 2, wherein:

further transmission of data is no longer possible when all memories of the transmission path are occupied by transmitted data.

4. The method as recited in claim 2, wherein:

the receiver transmits a message to a transmitter informing the transmitter that the memories of the receiver are full.

5. The method as recited in claim 1, wherein:

memories are available on a transmit side and a receive side.

6. A method of data transmission between a first control unit and a second control unit, comprising:

transmitting data from the first control unit to the second control unit;

causing one of the first control unit and the second control unit serving as a transmitting unit to receive feedback on an unsuccessful data transmission operation to a receiver due to further transmission of data being no longer possible after transmitting a certain number of data; and

causing the second control unit serving as a receiving unit to read out data stored in a last memory of the transmission path, the data stored in a next to last memory being then loaded into the last memory when the last memory is free, and the data from the third to last memory are loaded into the next to last memory, wherein;

memories in which transmitted data are stored are provided in the first control unit and the second control unit in a transmission path, and

further transmission of data is no longer possible when all memories of the transmission path are occupied by transmitted data.

7. The method as recited in claim 6, wherein:

if the last memory is filled again, a processor of the receiving unit receives information on data to be picked up.

8. A device for at least one of data transmission and data reception, comprising:

at least one interface to at least one additional device for at least one of data reception and data transmission; and

a structure including at least one of at least one transmit memory and at least one receive memory in which data that has been at least one of transmitted and received are stored until a transmission channel is free, wherein;

the transmission channel is free when received data are picked up, and

no communication is sent from the at least one additional device acknowledging that an unsuccessful transmission has occurred.

9. The device as recited in claim 8, wherein:

the device is designed as an ASIC that is a component of a control unit having a microprocessor.

10. The device as recited in claim 8, further comprising:

at least one current-based dual wire interface; and

a Serial Peripheral Interface, the at least one current-based dual wire interface and the Serial Peripheral Interface connecting the device to a processor of a control unit.

11. The device as recited in claim 10, wherein:

the at least one current-based dual wire interface includes a plurality of current-based dual wire interfaces.

12. The device as recited in claim 8, wherein:

the device, upon receiving data, transmits a message to an associated processor regarding data to be picked up.

13. The device as recited in claim 8, further comprising:

a plurality of memories; and

an arrangement for transmitting, if all of the memories are full, a message indicating that all of the memories are full.

14. A method of data transmission between a first control unit and a second control unit, one of the first control unit and the second control unit serving as a transmitting unit and the other as a receiving unit, comprising:

storing data to be transmitted in a transmit memory of the transmitting unit until a transmission channel is clear, the data remaining pending in the transmit memory of the transmitting unit when the transmission channel is not free, and the transmitting unit recognizing that data transmission has failed when the data remains pending in the transmit memory, wherein no communication is sent from the receiving unit acknowledging that an unsuccessful data transmission has occurred.

15. A method according to claim 14, further comprising:

storing the data received in at least one receive memory of the receiving unit until the data is picked up, the data remaining pending in the receive memory of the receiving unit when the data is not picked up; and

generating a message that the at least one receive memory is full indicating that the transmission channel is not free.

16. A device for data transmission according to claim 14, further comprising:

a structure including at least one receive memory in which data that has been received are stored until the data are picked up, wherein

the data remains pending in the receive memory of the receiving unit when the data is not picked, and

a message is generated that the at least one receive memory is full indicating that the transmission channel is not free.

17. A device for data transmission, comprising:

a transmitter having at least one interface to at least one additional device for data transmission; and

a structure including at least one transmit memory in which data that has been transmitted are stored until a transmission channel is free, wherein the data remaining pending in the transmit memory of the transmitting unit when the transmission channel is not free, and

the transmitting unit recognizes that data transmission has failed when the data remains pending in the transmit memory, wherein no communication is sent from a receiver acknowledging that an unsuccessful data transmission has occurred.