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Subscriber station for a bus system and method for improving the quality of transmission in a bus system

一种总线系统、用户站的技术，应用在改善总线系统中的发送质量领域

Active Publication Date: 2016-10-26
ROBERT BOSCH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] It is therefore the object of the present invention to provide a subscriber station for a bus system and a method for improving the transmission quality in a bus system, which solve the aforementioned problems

Method used

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  • Subscriber station for a bus system and method for improving the quality of transmission in a bus system
  • Subscriber station for a bus system and method for improving the quality of transmission in a bus system

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Embodiment Construction

[0041] 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 or the like, 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 respectively connected to a bus 40 having a first overall cable core 41 and a second bus Cable core 42. These total cable cores 41 , 42 can also be referred to as CAN_H and CAN_L and serve to couple in a dominant level in the transmit state. The messages 45 , 46 , 47 can be transmitted in the form of signals between the individual subscriber stations 10 , 20 , 30 via the bus 40 . Subscriber stations 10 , 20 , 30 can be, for example, control devices or display devices of a motor vehicle.

[0043] as in figure 1 As shown in , the subscriber stations 10, 30 each have a communication control device 11 and a transmitting / rec...

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Abstract

The invention provides a subscriber station (10; 30) for a bus system (1) and method for improving the quality of transmission in a bus system (1). The subscriber station (10; 30) comprises a transmission / reception device (12) for transmitting or receiving a message (45; 46; 47) to / from at least one further subscriber station of the bus system (1) via the bus system (1), in which bus system (1) is ensured at least intermittently an exclusive, collision-free access of a subscriber station (10, 20, 30) to a bus (40) of the bus system (1), wherein the transmission / reception device (12) comprises a transmission signal processing device (123) for transmission signal processing of a transmission signal to be transmitted by the transmission / reception device (12), and wherein the transmission signal processing unit (123) is designed for adjusting a predetermined bit symmetry of bits of the transmission signal by generating an internal transmission signal for the message (45; 46; 47), wherein the dominant phase of the bits is shortened and the recessive phase of the bits is extended, in the internal transmission signal.

Description

technical field [0001] The invention relates to a subscriber station for a bus system and a method for improving the transmission quality in a bus system, in which possible asymmetries between transmitted bits are reduced. Background technique [0002] For communication between sensors and control devices, the CAN bus system has become widely popular. In the CAN bus system, messages are transmitted by means of the CAN protocol, as described in the CAN specification in ISO11898. [0003] DE 10 000 305 A1 describes CAN (Controller Area Network) and an extension of CAN called TTCAN (Time Trigger CAN=Time Triggered CAN). The medium access control method used in CAN is based on bit-by-bit arbitration. In CAN, a bit-by-bit arbitration is performed based on a preamble identifier (fuehrender identifier) ​​within the message to be transmitted via the bus. [0004] As already described in DE 10 2012 200 997, in bit-wise arbitration initially several subscriber stations can simultan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/40
CPCH04L12/4013H04L2012/40215H04L2012/40267G05B2219/25032H04L25/0286H04L12/40169H04L25/028
Inventor F.哈特维奇S.瓦尔克I.黑埃曼
Owner ROBERT BOSCH GMBH
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