Subscriber station for a serial bus system and method for communicating in a serial bus system
A bus system and serial bus technology, applied in the transmission system, bus network, digital transmission system, etc., can solve the problems of low data transmission speed and small effective data length, achieve high fault tolerance, increase transmission speed, and improve transmission rate effect
Active Publication Date: 2021-07-23
ROBERT BOSCH GMBH
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Problems solved by technology
[0005] Although communication networks based on CAN or CAN FD offer many advantages with regard to, for example, their robustness, the speed is much lower compared to data transmission in, for example, 100 Base-T1 Ethernet (Ethernet)
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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[0037] figure 1A 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.
[0038] 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 and are used for electrical signal transmission after inputting a dominant level or generating a recessive level for signal coupling in the sending state. Messages 45 , 46 can be transmitted serially in the form of signals between the individual subscriber stations 10 , 20 , 30 via bus 40 . Subscriber stations 10 , 20 , 30 are, for example, control units, sensors, display devices, etc. of the motor vehicle.
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The invention relates to a subscriber station (10; 30) for a serial bus system (1) and to a method for communicating in a serial bus system. The subscriber station (10; 30) has a receiver (122) for receiving a signal from a bus (40) of the bus system (1), in which at least one first communication phase (451, 452, 454) and a second communication phase (453) are used in order to exchange messages (45; 46) between subscriber stations (10, 20, 30; 100) of the bus system (1). The subscriber station also has a device (15; 35) for analyzing received signals (RX) output by the receiver (122). The receiver (122) is designed to generate a digital received signal (RxD) from the signal received by the bus (40) and output same to the device (15; 35) at a terminal, wherein the device (15; 35) is designed to analyze the digital received signal (RxD) with respect to a specified communication protocol which determines when a specified communication phase (452) begins and ends that indicates a subsequent transmission of user data in a message (45), and the device (15; 35) is designed to reverse the data flow of the digital received signal (RxD) to the receiver (122) at the terminal for a duration of time of at least one bit if the analysis of the device (15; 35) results in that data is presently being received by the bus (40) in the specified communication phase (452).
Description
technical field [0001] The invention relates to a subscriber station for 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 the communication between sensors and control devices, for example in a vehicle, bus systems are often used in which data are stored in ISO 11898-1:2015 as the CAN protocol specification with CAN FD Standard to be transmitted as a message. 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 devices or vehicles increases, so does the data transmission in the bus system. For this, it is often also necessary to be able to transfer data from sender to 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 higher...
Claims
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IPC IPC(8): H04L12/40H04L12/413G06F13/00
CPCH04L12/40H04L2012/40215H04L12/4135H04L12/40006G06F13/4282G06F2213/0008
Inventor S·沃克尔A·穆特尔
Owner ROBERT BOSCH GMBH