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Method and device for monitoring a data transmission

A data transmission and data technology, which is applied in the direction of digital transmission system, transmission system, data exchange through path configuration, etc., can solve the problems of large inefficiency, protocol incompatibility, high overhead, etc., and achieve the effect of improving reliability

Inactive Publication Date: 2009-07-22
ROBERT BOSCH GMBH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, if the message is only transmitted event-oriented, the lack of confirmation of the message is not acceptable
[0005] A possible solution to the problem of lack of proof, especially in CAN-based systems, on the one hand, by using the transmission protocol proposed for this purpose, however, has the disadvantage of being incompatible with the protocol required by many applications, especially in Within the scope of diagnostics of the vehicle, or at a higher protocol layer, the so-called additional safety layer, the required verification is carried out, which disadvantageously results in higher error rates, in particular due to higher bus loads. High overhead, and greater inefficiency

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  • Method and device for monitoring a data transmission
  • Method and device for monitoring a data transmission

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Embodiment Construction

[0029] FIG. 1 shows a network N with a bus connection 100 and at least two subscribers 101 and 102 . However, other users are of course also conceivable according to the invention, such as 103 in the figure. The network or bus system refers to a system corresponding to ISO 15765-2, for example a CAN system, in particular in a vehicle. Other applications, of course, are also conceivable, in particular in the field of machine tools or in the field of industry and consumer goods, such as other bus systems.

[0030] As a transmission protocol, attention is given below to the aforementioned ISO 15765-2, in particular ISO / DIS 15765-2 of November 30, 1999 (ISO / TC22 / SC3 / WG1 / TF2N124). Any other protocol which fulfills the features of this ISO standard used according to the invention and which does not provide authentication services is also conceivable here.

[0031] The bus users in the example of FIG. 1 include bus interface 104 , 105 or 106 as well as processing units 107 , 108 and...

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Abstract

A method for monitoring data transmission between two users of a network, in particular a network according to the ISO 15765-2 transmission protocol, in which at least one transmitter transmits data telegrams (SF, FF, CF) in the form of data in which the data transmission takes place via at least one data telegram (SF) and, if the data of the data transmission is separated in a first data telegram (FF) and transmits at least one subsequent data telegram (CF), then Transmission of at least one flow control telegram (FC) from the receiver to the sender, characterized in that an additional flow control telegram is transmitted from the receiver to the sender after the last data telegram (SF, LCF) of a data transmission (FCB).

Description

technical field [0001] The invention relates to a method and a device for monitoring data transmission between at least two users of a network. Background technique [0002] The method of data transmission, especially the corresponding transmission protocol, is generally used in the situation that a large data set divided into small data packets should be reliably transmitted. Hereinafter, a large data set divided into small data packets is called a message, further For , the small packets of data are called data telegrams or also "data frames". For example CAN telegrams (CAN: Controller Area Network) allow the transmission of a certain number of useful bytes. If larger packets or data sets are to be sent, a transport protocol must be used that fragments the message at the transmitter and assembles it at the receiver. [0003] ISO (International Organization for Standardization) has developed the 15765 standard especially for diagnostic applications. The second part of th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L1/18H04L1/00H04L1/16H04L12/28H04L47/43
CPCH04L1/188H04L1/1621H04L1/16
Inventor D·罗德U·楚尔米尔
Owner ROBERT BOSCH GMBH
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