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Subscriber station for serial bus system and method for sending messages in serial bus system

A serial bus, bus system technology, applied in the field of user stations for serial bus systems and for sending messages in serial bus systems, can solve up to 64 bytes of useful data, small length, low speed, etc. problems, to achieve weight reduction, large error robustness, and reduced material usage

Active Publication Date: 2022-08-09
ROBERT BOSCH GMBH
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  • Description
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AI Technical Summary

Problems solved by technology

[0005] Even though communication networks based on CAN or CAN FD offer great advantages, for example in terms of their robustness, they are significantly less fast than data transmission in the case of, for example, 100 Base-T1 Ethernet
Furthermore, the useful data lengths of up to 64 bytes achieved hitherto with CAN FD are too small for some applications

Method used

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  • Subscriber station for serial bus system and method for sending messages in serial bus system
  • Subscriber station for serial bus system and method for sending messages in serial bus system
  • Subscriber station for serial bus system and method for sending messages in serial bus system

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Embodiment Construction

[0037] As an example, figure 1 A bus system 1 is shown, which is designed in particular for a CAN bus system, a CANFD bus system, a CAN EL bus system and / or variants thereof, as will be described later. The bus system 1 can be used in vehicles, in particular motor vehicles, airplanes, etc., or in hospitals or the like.

[0038] exist figure 1 Here, the bus system 1 has, in particular, parallel bus lines 3 to which a large number of subscriber stations 10, 20, 30 are connected. The messages 4 , 5 can be transmitted serially in the form of signals between the individual subscriber stations 10 , 20 , 30 via the bus line 3 . The user stations 10 , 20 , 30 are, for example, control devices, sensors, display devices, etc. of the motor vehicle.

[0039] like figure 1 As shown, the subscriber station 10 has a communication control device 11 and a transmission / reception device 12 . On the other hand, the subscriber station 20 has a communication control device 21 and a transmissio...

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Abstract

A subscriber station (20; 30) for a bus system (1) and a method for sending messages at different bit rates in the bus system (1) are provided. The subscriber station (20; 30) comprises a sending stage (2200) for sending messages (4; 5) to the bus line (3) of the bus system (1), wherein the sending stage (2200) has an output stage (225, 226, 2270, 2280) for switching the differential bus signal (CAN_EL_H; CAN_EL_H) between a high bus state (461) and a low bus state (471) for the message (5), and where the transmit stage (2200) is constructed In order for the differential bus signals (CAN_EL_H; CAN_EL_H) to have the same level for the low bus state ( 471 ) for at least one phase for transmitting the data of the message ( 5 ), the low bus state ( 471 ) is driven low ohmically.

Description

technical field [0001] The invention relates to a subscriber station for a serial bus system and a method for sending messages in a serial bus system with high data rates and high error robustness (Fehlerrobustheit )Work. Background technique [0002] Bus systems, in which data are transmitted as messages in the standard ISO 11898-1:2015, which is the CAN protocol specification with CAN FD, are frequently used for communication between sensors and control devices, for example in vehicles. Messages are transmitted between the bus users of the bus system, eg sensors, control devices, transmitters (Geber), etc. [0003] As the number of functions of a technical device or vehicle increases, so does the data traffic in the bus system. There is also often a need to be able to transfer data from the transmitter to the receiver faster than hitherto. As a result, the required bandwidth of the bus system will further increase. [0004] In order to be able to transmit data at a hig...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/413
CPCH04L12/4135H04L2012/40215H04L12/407H04L12/413
Inventor S·沃克尔
Owner ROBERT BOSCH GMBH
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