Serial Bus Control Stage for Data Frame Synchronization
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Solution Overview
Problem
Existing serial bidirectional bus data transmission systems face complexity and errors due to low signal-to-noise ratios and large distances, requiring complex evaluation circuits to manage data frame synchronization and insertion, leading to reduced data transmission rates.
Innovation Solution
Incorporating a control stage at the bus end to trigger the send device upon receipt of a data frame, eliminating the need for control signals and allowing bus subscribers to easily add their data fields without complex gapless concatenation, while enabling flexible data field positioning and error detection through check data, ensuring high data transmission rates and system adaptability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If complex evaluation circuits are used to manage data frame synchronization and insertion, then data transmission reliability is improved, but device complexity increases
Solution Approach 1:
The patent extracts the synchronization control function from complex evaluation circuits and implements it through a dedicated control signal line. The control device sends explicit control signals to bus subscribers indicating when to transmit data frames, eliminating the need for complex synchronization logic in each subscriber's evaluation circuit.
Solution Approach 2:
The patent introduces a control signal as an intermediary between the control device and bus subscribers. This control signal mediates the data transmission process by explicitly告知 subscribers when to send data frames, simplifying their evaluation circuits while maintaining reliable synchronization.
2Reliability
If control signals are used to synchronize data transmission, then data transmission reliability is improved, but data transmission rate decreases
Solution Approach 1:
The patent merges the control signal transmission with the data frame transmission by having the control device send control signals that directly trigger data frame sending. This integration reduces the number of separate communication phases and improves overall transmission efficiency.
Solution Approach 2:
The control device sends control signals in advance to inform bus subscribers when they should transmit their data frames. This preliminary action allows subscribers to prepare and transmit data immediately upon receiving the control signal, minimizing delays and maximizing data transmission rate.
3Manufacturing precision
If gapless concatenation of data fields is enforced, then data transmission precision is improved, but device complexity increases
Solution Approach 1:
The patent enables each bus subscriber to independently determine its data field position based on the control signal received and its own identification. This self-service approach eliminates the need for complex mechanisms to enforce gapless concatenation, as each subscriber autonomously places its data field in the correct position within the data frame.
4Device complexity
If evaluation circuits are made simpler, then device complexity decreases, but measurement precision of data frame end detection worsens
Solution Approach 1:
The control signal acts as an intermediary that provides explicit information to bus subscribers about when to transmit and the structure of data frames. This external reference signal enables simple evaluation circuits to accurately detect data frame boundaries and endings without requiring complex internal synchronization logic.
Data Source
AI summary
A system is described for transmitting data in a serial bidirectional bus with a control device (1) comprising a send and receiving unit (34) for data fields (7, 8 and 9) combined into a data frame (6), and with bus subscribers (2, 3 and 4) which comprise an evaluation circuit (10) for reading in and reading out data fields (7, 8, 9, 14, 15 or 16) in data frames (6, 11), with at least the bus subscriber (4) at the bus end opposite of the control device (1) comprising a send device (12) for a data frame (11). In order to provide simple constructional conditions it is proposed that at least the bus subscriber (4) at the end of the bus comprises a control stage (13) which is activated by a received data frame (6) and triggers the send device (12) depending on the receipt of a data frame (6) within the terms of the transmission of a data frame (11) for at least the data fields (14, 15 and 16) of the bus subscribers (2, 3 and 4).