Measuring System Data Acquisition via Segmented Message Transmission
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Solution Overview
Problem
In measuring systems with a large number of meters and communication adapters, the high volume of data and limited bandwidth lead to increased transmission time, making it difficult to accurately determine the measurement time, especially during peak data transmission periods, which is critical for billing and data integrity.
Innovation Solution
The method involves converting measured values into quick and secure messages, where quick messages are transmitted first to establish the receipt time, allowing for immediate evaluation and subsequent transmission of secure messages, which have a larger data volume, thus optimizing transmission speed and ensuring data integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If a large number of meters and communication adapters transmit measured values simultaneously to the evaluation unit, then the data volume and transmission time increase, but the ability to accurately determine transmission time deteriorates
Solution Approach 1:
The transmission process is segmented into two separate phases: a first transmission phase for measured values without encryption overhead, and a second transmission phase for encryption-related data (signatures, checksums, public keys). This segmentation allows the system to handle large data volumes in the first phase while determining transmission time accurately based on this initial transmission, avoiding the time measurement errors that would occur if all data were transmitted together in a single large packet.
2Quantity of substance
If the transmission medium provides limited bandwidth, then the transmission time increases, but the evaluation unit's ability to determine transmission time accurately deteriorates
Solution Approach 1:
The system performs preliminary transmission of measured values in the first transmission phase before completing the full data package with encryption overhead. The evaluation unit determines transmission time based on this initial transmission, allowing it to establish accurate timing information before the additional encryption data is transmitted. This preliminary action ensures that time determination is not delayed or obscured by the extended transmission duration caused by limited bandwidth.
3Reliability
If measured values are transmitted with encryption and integrity check data, then data security is improved, but the transmission time and data volume increase
Solution Approach 1:
Encryption-related data (signatures, checksums, public keys) is transmitted in a separate second phase after the measured values are transmitted in the first phase. This allows the system to maintain high data security through proper encryption while avoiding the time penalty of transmitting all data together. The measured values can be processed sooner based on the first transmission time, while encryption verification occurs subsequently.
Data Source
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AI summary
Method for acquiring measured values in a measuring system with a plurality of counters and communication adapters, each transmitting one or more measured values to an evaluation unit, wherein: • the measured value to be transmitted is converted into a fast message and a secure message before a transmission operation, wherein the secure message authenticates the fast message and the fast message and/or the secure message contain the measured value, • the fast message is transmitted to the evaluation unit and the time of receipt is stored, • the secure message is transmitted to the evaluation unit, • the fast message is authenticated with the secure message, the measured value is obtained from the fast message and/or secure message and the time of receipt of the fast message is assigned to the obtained measured value.