PSI5 Sensor Data Packet Redundancy for Interference Mitigation
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Solution Overview
Problem
Electromagnetic interference can affect data transmission over unshielded cables, leading to communication time inefficiencies and potential loss of data packets, particularly in environments where redundant requests are needed to ensure data integrity.
Innovation Solution
A method and system for transmitting data packets via a Peripheral Sensor Interface 5 (PSI5) that involves sending and re-sending data packets in multiple time slots within a transmission period, allowing for verification and detection of interference, thereby ensuring high-probability correct transmission and increased redundancy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If data packets are sent repeatedly in succession to ensure correct transmission, then transmission reliability is improved, but communication time is lost and productivity decreases
Solution Approach 1:
The sensor transmits the data packet in advance in multiple time slots before the control unit requests it. By proactively sending redundant copies of the data packet in successive time slots, the system ensures that at least one copy arrives correctly even if some are corrupted by interference, eliminating the need for retransmission requests and improving overall communication efficiency
Solution Approach 2:
The data packet is transmitted periodically in successive time slots within the transmission period. This periodic transmission approach allows the system to send multiple copies of the same data packet at regular intervals, increasing the probability that at least one copy will be received correctly without requiring additional communication rounds
2Reliability
If data packets are transmitted redundantly to overcome electromagnetic interference, then transmission reliability is improved, but communication time is wasted and time loss increases
Solution Approach 1:
The sensor sends redundant data packets in advance during the transmission period before the control unit needs to request them. This preliminary redundant transmission ensures that even if some packets are corrupted by electromagnetic interference, correct packets are already available at the control unit, eliminating the need for time-consuming retransmission requests
Solution Approach 2:
The system continuously transmits data packets in successive time slots without interruption or waiting for acknowledgments. This continuous transmission approach ensures that the communication channel remains actively useful throughout the transmission period, maximizing data delivery probability while minimizing idle time and communication delays
Data Source
AI summary
A method for transmitting a data packet from a sensor to a controller via a peripheral sensor interface includes transmitting the data packet from the sensor via the sensor interface in a time window of a transmission period of a sensor interface operating mode which is synchronized by the controller. The data packet is re-transmitted by the sensor within the transmission period in at least one additional time window of the transmission period.