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Subscriber station for serial bus system and method for communicating in serial bus system

A technology of a serial bus and a bus system, which is applied to a user station for a serial bus system and used in the field of communication in the serial bus system, can solve the problems of poor connection quality and can no longer prevent communication connection failures, etc. Achieve high safety and ensure the effect of functional safety

Active Publication Date: 2022-03-01
ROBERT BOSCH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this solution is that initially many erroneous frames have to be counted in order to identify an imminent failure of the communication link
Bad frames mean that the connection quality is very poor and thus an error has occurred
but leaves little or no time to react and thus may no longer be able to protect against failure of the communication link

Method used

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  • Subscriber station for serial bus system and method for communicating in serial bus system
  • Subscriber station for serial bus system and method for communicating in serial bus system
  • Subscriber station for serial bus system and method for communicating in serial bus system

Examples

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Embodiment Construction

[0036] figure 1 A bus system 1 is shown as an example, which is designed in particular based on the CAN bus system and / or the CAN FD bus system and / or the CAN FD successor bus system referred to here as the CAN XL bus system and / or their modifications, As explained next. The bus system 1 can be used in vehicles, in particular motor vehicles, aircraft, etc., or in hospitals or the like.

[0037] exist figure 1 In this case, the bus system 1 has a plurality of subscriber stations 10 , 20 , 30 which are each connected to a bus 40 with a first bus core 41 and a second bus core 42 . The bus 40 is terminated at its two ends with terminating resistors 50 . The bus wires 41 , 42 can also be referred to as CAN_H and CAN_L or CAN-XL_H and CAN-XL_L and are used for coupling input dominant level or generating Electrical signal transmission is performed after the recessive level. Telegrams 45 , 46 in the form of signals CAN_H and CAN_L or CAN-XL_H and CAN-XL_L can be transmitted seria...

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PUM

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Abstract

A subscriber station (10, 20, 30, 10A to 10D) for a serial bus system (1) and a method for communicating in a serial bus system (1) are provided. The subscriber station (10, 20, 30, 10A to 10D) has a communication control device (11, 21, 31) for controlling a communication of the subscriber station (10, 20, 30, 10A to 10D) with at least one further subscriber station (20, 10, 30) of the bus system (1), transmitting / receiving means (12, 22, 32) for receiving transmission signals (TXD) generated by communication control means (11, 21, 31) of subscriber stations (10, 20, 30, 10A to 10D) of the bus system (1) in frames (450, 460) of a bus (40) of the bus system (100) and for generating reception signals (RXD, RXDA to RXDE) from the received frames (450, 460); the invention relates to a bus system (1) comprising at least two transmitting / receiving devices (12, 22, 32), and a connection mass block (15, 25, 35) for detecting and evaluating the quality of a communication connection with subscriber stations (10, 20, 30, 10A to 10D) of the bus system (1) from received signals (RXD, RXDA to RXDE) generated by the transmitting / receiving devices (12, 22, 32) using at least two time quanta (TQ), the bit time (TB) of the bits of the generated received signals (RXD, RXDA to RXDE) being divided into the time quanta.

Description

technical field [0001] The invention relates to a subscriber station for a serial bus system and a method for communicating in a serial bus system, with which the subscriber station can evaluate the quality of the connection to or in the bus system and, if necessary, Measures for improving connection quality can be taken. Background technique [0002] For cost reasons, bus systems are currently being used more and more frequently instead of point-to-point connections for communication between sensors and controllers, for example in vehicles, in which bus systems the data is stored as CAN with CAN FD Protocol specifications in the standard ISO 11898-1:2015 for transmission of messages. The telegrams are transmitted between subscriber stations of the bus system, such as sensors, controllers, transmitters, etc. Here, CAN FD is currently used in vehicles in the first step in the introduction phase with a data bit rate of 2 Mbit / s for the transmission of bits in the data field ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/40
CPCH04L12/40H04L2012/40215H04L2012/40273H04L12/2876H04L12/40013H04L12/40019
Inventor F·哈特维奇S·沃克尔A·穆特尔
Owner ROBERT BOSCH GMBH