Subscriber station of a bus system and method for time-optimized data transmission in a bus system

A bus system and user station technology, applied in the field of time-optimized data transmission, can solve the problem of not being able to increase the baud rate arbitrarily, and achieve the effect of improving the transmission speed of CAN

Active Publication Date: 2021-08-10
ROBERT BOSCH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Therefore, given the physical extent of the bus system or network, the baud rate cannot be increased arbitrarily during arbitration

Method used

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  • Subscriber station of a bus system and method for time-optimized data transmission in a bus system
  • Subscriber station of a bus system and method for time-optimized data transmission in a bus system
  • Subscriber station of a bus system and method for time-optimized data transmission in a bus system

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Embodiment Construction

[0034] figure 1 A bus system 1 is shown, which can be, for example, a CAN bus system, a CAN FD bus system or the like. The bus system 1 can be used in vehicles, in particular motor vehicles, aircraft, etc., or in hospitals or the like.

[0035] exist figure 1 In this case, the bus system 1 has a bus line 3 to which a plurality of subscriber stations 10 , 20 , 30 are connected. Messages N1 , N2 , N3 in the form of signals can be transmitted between the individual subscriber stations 10 , 20 , 30 via the bus line 3 . Subscriber stations 10 , 20 , 30 can be, for example, control units, sensors, display devices, etc. of a motor vehicle.

[0036] Such as figure 1 As shown in , the subscriber station 10 has a communication control device 11 , an encoding device 12 and a transmitting / receiving device 13 . In contrast, the subscriber station 20 has a communication control device 21 , an encoding device 22 and a transmitting / receiving device 23 . The subscriber station 30 has a c...

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Abstract

A subscriber station (20; 30; 200; 300) for a bus system (1) and a method for time-optimized data transmission in the bus system (1; 2) are provided. A subscriber station (20; 30; 200; 300) comprises bits for processing messages (N1; N2; N3; N4; N5; N6) to / from at least one other subscriber station of the bus system (1; 2) Coding means (12; 22; 32; 120; 220; 320) for encoding and / or decoding, in which the bus system ( 1; 2) exclusive, conflict-free access to the bus line (3), wherein the encoding device (12; 22; 32; 120; 220; 320) is designed to, in the message (N1; N2; N3; N4; N5; N6) assigning a predetermined voltage level within a bit time (TB) to at least two bits as bit combinations when encoding, and / or wherein the encoding means (12; 22; 32; 120; 220; 320 ) is designed to assign at least two bits as a bit combination to a predetermined voltage level within a bit time (TB) when decoding a message (N1; N2; N3; N4; N5; N6).

Description

technical field [0001] The invention relates to a subscriber station for a bus system and to a method for time-optimized data transmission in a bus system. Background technique [0002] For communication between sensors and control devices, the CAN bus system has become widely popular, for example in automobiles. In the CAN bus system, messages are transmitted by means of the CAN protocol as described in ISO11898. In particular, automotive bus systems continue to develop higher bandwidth, shorter latency and stricter real-time performance. Techniques such as CAN FD have also recently been proposed for this purpose, in which the maximum data rate has been increased to values ​​above 1 MBit / s by using higher clocks in the area of ​​the data field. Such messages are also referred to below as CAN FD frames or CAN FD messages. In the case of CAN FD, expanding the effective data length from 8 bytes to 64 bytes, the data transmission rate is significantly higher than in the case...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L1/00H04L12/40
CPCH04L1/0006H04L12/4013H04L2012/40215G06F13/3625G06F13/372
Inventor S·蒂勒
Owner ROBERT BOSCH GMBH
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