User station for a bus system and method for reducing line-conducted emissions in a bus system

Patent metadata

Field	Value
Publication number	US-10164792-B2
Application number	US-201515122742-A
Country	US
Kind code	B2
Filing date	Feb 27, 2015
Priority date	Mar 5, 2014
Publication date	Dec 25, 2018
Grant date	Dec 25, 2018

Abstract

A user station for a bus system and a method for reducing line-conducted emissions in a bus system, in which the user station includes a transceiver for transmitting or receiving a message from at least one additional user station of the bus system via the bus system. In the bus system, exclusive, collision-free access to a bus of the bus system by a user station is at least temporarily ensured. The transceiver includes an emission control device for controlling the properties of the transceiver to reduce line-conducted emissions in the bus system. The transceiver is also configured for switching the emission control device on or off as a function of the arbitration phase and the data area of the message.

First claim

What is claimed is:

1. A user station for a bus system, comprising:
a transceiver to transmit or receive a message from at least one additional user station of the bus system via the bus system, wherein in the bus system, exclusive, collision-free access to a bus of the bus system by a user station is at least temporarily ensured;
wherein the transceiver includes an emission control device to control the properties of the transceiver to reduce line-conducted emissions in the bus system, and
wherein the transceiver is configured to switch the emission control device on or off as a function of the arbitration phase and the data area of the message.

2. The user station of claim 1 , further comprising:
a communication control device to control the communication in the bus system, wherein the communication control device or the transceiver includes a detection device to detect a data area.

3. The user station of claim 2 , wherein the transceiver includes a detection device configured to recognize the data area based on detection of a BRS bit at the end of an arbitration phase.

4. The user station of claim 2 , wherein the transceiver is configured to recognize the data area based on a switching signal from the communication control device.

5. The user station of claim 2 , wherein the communication control device includes a detection device to, after recognizing the data area, output a switching signal to the transceiver via a terminal.

6. The user station of claim 2 , wherein the transceiver includes a detection device configured to recognize the data area based on monitoring of a transmission signal.

7. The user station of claim 6 , wherein the detection device includes a counter for counting falling or rising edges of the transmission signal.

8. The user station of claim 7 , wherein the detection device includes a timing element to reset the counter.

9. A bus system, comprising:
a bus;
at least two user stations connected to one another via the bus so that they are able to communicate with one another;
wherein at least one of the at least two user stations includes a user station which includes:
a transceiver to transmit or receive a message from at least one additional user station of the bus system via the bus system, wherein in the bus system, exclusive, collision-free access to a bus of the bus system by a user station is at least temporarily ensured;
wherein the transceiver includes an emission control device to control the properties of the transceiver to reduce line-conducted emissions in the bus system, and
wherein the transceiver is configured to switch the emission control device on or off as a function of the arbitration phase and the data area of the message.

10. A method for reducing line-conducted emissions in a bus system, the method comprising:
transmitting, with a transceiver, a message from at least one additional user station of the bus system via the bus system, wherein the bus system at least temporarily ensures an exclusive, collision-free access to a bus of the bus system by a user station;
controlling the properties of the transceiver, using an emission control device of the transceiver, to reduce line-conducted emissions of the bus system; and
switching the emission control device on or off as a function of the arbitration phase and the data area of the message.

Assignees

• Bosch Gmbh Robert

Inventors

• Hehemann Ingo
• Hartwich Florian
• Walker Steffen

Classifications

• H04L2012/40215

  Controller Area Network CAN · CPC title

• H04L25/028

  Arrangements specific to the transmitter end · CPC title

• H04L12/413 Primary

  with random access, e.g. carrier-sense multiple-access with collision detection [CSMA-CD] · CPC title

• H04L12/40039

  Details regarding the setting of the power status of a node according to activity on the bus · CPC title