Fieldbus Telegram Redundancy for Data Integrity Checks
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Solution Overview
Problem
Existing data transmission methods in process automation technology, such as DE 102007032659 A1, require fragmentation of user data, leading to increased effort and inefficiency, while methods like US6915444 use inverted sub-messages but do not ensure secure transmission without data fragmentation.
Innovation Solution
The method employs redundant and diverse data formats for information transmission via a fieldbus, using a first and second data format within the same telegram, allowing for integrity checks and error detection by comparing the data formats, with the second format being an inverted bit sequence or text character code, and including a checksum for consistency verification.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If data is transmitted in a single format in a telegram, then the transmission is simple and efficient, but data integrity verification is insufficient
Solution Approach 1:
The patent creates a copy of the data in a different representation format (inverted bit sequence) and transmits both copies together. This allows verification by comparing the two copies without requiring complex external verification systems, as the verification capability is built into the transmission structure itself.
Solution Approach 2:
The patent uses bit sequence inversion as the transformation method for creating the redundant data representation. By inverting the bits (changing 0s to 1s and 1s to 0s), the system creates a verifiable copy that can detect transmission errors through comparison, implementing reliability through inversion rather than traditional redundancy.
2Productivity
If data is fragmented into sub-blocks for transmission, then long data length is achieved in a single telegram, but additional processing effort is required for reassembly
Solution Approach 1:
The patent combines the original data and its inverted copy into a single telegram transmission unit. Rather than fragmenting data into multiple sub-blocks that require reassembly, the complete data pair (original + inverted) is transmitted together in one telegram, eliminating the need for complex reassembly operations at the receiving end.
3Reliability
If redundant data transmission is implemented for error detection, then data security is improved, but transmission bandwidth is consumed
Solution Approach 1:
The patent transforms the data into a different parameter representation (inverted bit sequence) rather than transmitting additional redundant data. This parameter transformation approach provides error detection capability while consuming minimal additional bandwidth, as the inverted sequence is derived from the original data rather than being independent redundant information.
Data Source
Figure 1
AI summary
Method for transmitting data in messages via a process automation field bus (FB), wherein information is transmitted via the field bus in the form of data by means of at least one message (T), wherein the information, in particular the same information, is transmitted in a first data format (ND) and in a second data format (SD) by means of the at least one message (T), wherein the first data format (ND) differs from the second data format (SD).