Device for a subscriber station of a serial bus system and method for communication in a serial bus system

A bus system and serial bus technology, applied to the device used in the user station of the serial bus system and the communication field in the serial bus system, can solve the problems of low data transmission speed and less effective data length, etc. Achieve high fault tolerance, time saving and high data rate

Active Publication Date: 2021-07-30
ROBERT BOSCH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005]Although communication networks based on CAN or CAN FD offer many advantages with respect to e.g. much lower speed than
Furthermore, the effective data lengths of up to 64 bytes achieved so far in the case of CAN FD are too little for some applications

Method used

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  • Device for a subscriber station of a serial bus system and method for communication in a serial bus system
  • Device for a subscriber station of a serial bus system and method for communication in a serial bus system
  • Device for a subscriber station of a serial bus system and method for communication in a serial bus system

Examples

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Embodiment Construction

[0041] figure 1 A bus system 1 is shown as an example, which is designed essentially for CAN bus systems, CAN FD bus systems, CAN EL bus systems and / or variants thereof, as will be described below. The bus system 1 can be used in vehicles, in particular motor vehicles, aircraft, etc., or in hospitals or the like.

[0042] 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 wires 41 , 42 can also be referred to as CAN_H and CAN_L or CAN-EL_H and CAN-EL_L, and are used for electrical signal transmission after inputting a differential level for signal coupling or generating a recessive level in the transmitting state. Messages 45 , 46 can be transmitted serially in the form of signals between the individual subscriber stations 10 , 20 , 30 via bus 40 . If an error occurs while communicating on the bus 40, such as by figure 1 As shown b...

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Abstract

Provided are a device (12; 16; 32) for a serial bus system (1) and a method for communication in a serial bus system (1). The device (12; 16; 32) has a receiver (122) for receiving a signal from a bus (40) of the bus system (1), wherein, for a message (45) which is exchanged between subscriber stations (10, 20, 30) of the bus system (1), the bus states (401, 402) of a signal received from the bus (40) in the first communication phase (451; 453, 451) differ from bus states (U_D0, U_D1) of the signal received in the second communication phase (452), wherein the receiver (122) is designed to generate a digital signal (RXD; S1) on the basis of the signal received from the bus (40) and to output the signal (RXD; S1) to a communication control device (11) in order to evaluate the data contained in the digital signal (RXD; S1), wherein the receiver (122) is additionally designed to use at least one first receiving threshold (T_d; Td1) and a second receiving threshold (T_p1; T_p1, T_p2; T_p1, T_p2, T_p3; T_p3; T_d2) in the second communication phase (452) in order to generate the digital signal (RXD; S1), and wherein the second receiving threshold (T_p1; T_p1, T_p2; T_p1, T_p2, T_p3) has a negative threshold value or the second receiving threshold (T_p3; T_d2) has a voltage value that is greater than the largest voltage value which is driven by a subscriber station (10, 20, 30) of the bus system (1) for a bus state in the second communication phase (452).

Description

technical field [0001] The invention relates to an arrangement for a subscriber station of a serial bus system and a method for communication in a serial bus system which operates with a high data rate and high error tolerance. Background technique [0002] For communication between sensors and control devices, for example in a vehicle, bus systems are often used in which data are sent as messages under the ISO11898-1:2015 standard as the CAN protocol specification Transmitted with CAN FD. These messages are transmitted between subscriber stations of the bus system, such as sensors, control units, generators, etc. [0003] As the number of functions of technical installations or vehicles increases, so does the data transmission in the bus system. To this end, it is often also necessary to be able to transfer data from sender to receiver faster than before. The consequence of this is that the required bandwidth of the bus system will increase further. [0004] In order to...

Claims

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Application Information

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Patent Type & AuthorityApplications(China)
IPC IPC(8): H04L12/40
CPCH04L12/40169H04L2012/40215H04L9/3247H04L12/40013H04L12/40026H04L12/40039
InventorF·哈特维奇S·沃克尔A·穆特尔
OwnerROBERT BOSCH GMBH