Radio Device Mode Switching for Time-Critical Data Delivery
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Solution Overview
Problem
Existing wireless communication systems face challenges in ensuring reliable and timely delivery of data in time-critical applications, particularly in industrial and automotive scenarios, where loss of several consecutive packets can lead to emergency stops, while current methods are inefficient in resource utilization.
Innovation Solution
Implementing a dual transmit mode strategy where a first mode is less resource-intensive but ensures timely delivery, switching to a second mode with increased resources and redundancy when nearing a survival time to ensure data delivery before critical deadlines are missed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single transmit mode is used continuously, then device complexity is reduced, but reliability of time-critical data delivery cannot be ensured
Solution Approach 1:
The patent implements dynamic switching between first and second transmit modes based on real-time assessment of survival time expiration risk. The system transitions from a static single-mode operation to a dynamic multi-mode operation, where the transmit mode is adapted according to the current transmission state and time-critical requirements, thereby ensuring reliability without requiring complex continuous operation of multiple modes simultaneously
2Reliability
If second transmit mode is activated continuously, then data delivery reliability is improved, but resource consumption increases
Solution Approach 1:
The patent segments the transmission operation into two distinct modes: first transmit mode for normal conditions and second transmit mode for critical situations. By segmenting the operation time and resource allocation, the system only consumes high-resource second mode when necessary (when survival time expiration is detected), rather than continuously, thus optimizing the trade-off between reliability and resource consumption
Solution Approach 2:
The system performs preliminary assessment of survival time status before each transmission. By evaluating whether the current transmission state puts the system at risk of exceeding survival time, the system can proactively switch to second transmit mode only when needed, avoiding unnecessary resource consumption in safe operating conditions
3Use of energy by moving object
If first transmit mode is used, then resource consumption is reduced, but data delivery reliability deteriorates when survival time is critical
Solution Approach 1:
The patent implements feedback mechanisms where the transmitting radio device monitors transmission status and survival time expiration risk. Based on this feedback, the system dynamically adjusts the transmit mode - using resource-efficient first mode during safe periods and switching to reliable second mode when feedback indicates critical survival time status, thus optimizing both resource consumption and reliability across different operational phases
Data Source
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AI summary
A method to operate a transmitting radio device of a radio communications network is provided, wherein the method comprises: transmitting (102), towards a receiving radio device, first data according to a first transmit mode; determining (104) a last reception time when a positive acknowledgment was received from the receiving radio device, the positive acknowledgement indicating a successful reception of the transmitted first data at the side of the receiving radio device; and transmitting (106), towards the receiving radio device, second data according to a second transmit mode, wherein the second transmit mode is activated upon expiry of a first transmit mode time period since the determined last reception time.