Building Services Data Transmission With Adaptive Repeat Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing data transmission methods in metering technology face challenges in optimizing the number of repeated transmissions to ensure interference-free reception of domestic data messages, leading to unnecessary channel load and battery usage, especially as the battery's functional life nears its end.
Innovation Solution
A method and device that determine the current packet error rate by calculating the ratio of successfully received data messages to transmitted messages, adaptively adjusting the number of repeated transmissions to achieve a desired packet error rate, and communicate this adjustment to the data source to optimize data message reception without interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If data messages are repeatedly transmitted to ensure interference-free reception, then the reliability of data reception is improved, but the transmission channel load increases and battery energy is consumed unnecessarily
Solution Approach 1:
The patent applies dynamics by making the number of repeated transmissions adaptive rather than fixed. The system dynamically adjusts the repetition count based on real-time packet error rate measurements and interference conditions, transitioning from a static transmission strategy to a dynamic one that responds to changing channel conditions.
Solution Approach 2:
The patent implements feedback by measuring the packet error rate of received data messages and using this information to control the number of repeated transmissions. The receiver provides feedback about transmission quality, and the transmitter adjusts its behavior based on this feedback, creating a closed-loop control system that optimizes energy usage while maintaining reliability.
2Reliability
If the number of repeated transmissions is increased to overcome interference, then the packet error rate is reduced, but the transmission channel load increases
Solution Approach 1:
The system dynamically adjusts the number of repeated transmissions based on measured packet error rates and interference conditions. Instead of using a fixed high repetition count that always ensures reliability but wastes channel capacity, the system adapts the repetition count to actual conditions, improving channel efficiency while maintaining acceptable reliability.
Solution Approach 2:
The patent changes the transmission parameter (number of repetitions) based on measured packet error rates. By monitoring the packet error rate and adjusting the repetition count accordingly, the system optimizes the balance between reliability and channel efficiency, using more repetitions only when necessary to overcome interference.
3Loss of time
If frequent repeated transmissions are performed to ensure current data is captured, then data up-to-dateness is improved, but battery functional life is reduced
Solution Approach 1:
The system uses feedback from packet error rate measurements to control transmission frequency. By monitoring transmission quality and adjusting repetition counts based on this feedback, the system ensures data is transmitted frequently enough to maintain up-to-dateness when needed, while reducing unnecessary transmissions to preserve battery life.
Solution Approach 2:
The transmission system serves itself by autonomously adjusting its behavior based on measured conditions. The device monitors its own transmission quality and automatically adapts the number of repetitions, eliminating the need for external control and enabling the system to optimize its own energy consumption while maintaining data currency.
4Reliability
If a fixed number of repeated transmissions is specified to ensure sufficient reception probability, then reliability is maintained, but unnecessary transmissions occur especially near battery end-of-life
Solution Approach 1:
The patent transforms the fixed repetition count into a dynamic parameter that adapts to changing conditions. By measuring packet error rates and adjusting the number of repetitions accordingly, the system maintains sufficient reception probability while avoiding unnecessary transmissions that would waste battery energy, especially important as the battery approaches end-of-life.
Solution Approach 2:
The system changes the transmission parameter (number of repetitions) based on measured packet error rates and battery status. This parameter adaptation allows the system to maintain reliability thresholds while optimizing energy consumption, reducing the number of transmissions when conditions are good and increasing them only when necessary to maintain reception probability.
Data Source
AI summary
Domestic data are transmitted in the form of data messages from a data source to a memory in an unsynchronized manner in time slots via a freely accessible and accordingly heavily used transmission channel. On account of the interfering influences on the long data messages which occur in this case, the transmission of the data messages must be repeated several times until a data message is received without interference once. A comparator is used to determine a packet error rate from the ratio of the number of data messages received without interference over a certain period to the number of data messages actually transmitted during the period. A predefined packet error rate can be adaptively complied with despite varying transmission circumstances by varying the repeated transmissions per unit time.