V2V Alarm Message Transmission for Power Conservation
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Solution Overview
Problem
Current V2X communication systems face challenges in reducing power consumption while ensuring the reception of event information, as they often require continuous wake-up states for potential event notifications, leading to increased resource overhead and power consumption.
Innovation Solution
A method is proposed where an alarm message is sent instead of a message containing actual event information, allowing devices to recognize event occurrences without receiving detailed information, thereby reducing power consumption and improving event receptibility through optimized broadcasting cycles and resource allocation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If devices continuously monitor for event information in V2X communication, then event reception reliability is improved, but power consumption increases
Solution Approach 1:
The patent implements discontinuous reception (DRX) cycles where receiving devices alternately sleep and wake up to monitor alarm messages. During DRX cycles, devices only activate at predetermined intervals to check for alarm messages, rather than continuously monitoring. This periodic action maintains event reception capability while significantly reducing power consumption during idle periods.
Solution Approach 2:
The patent extracts only the essential alarm notification function from complete event information transmission. Instead of transmitting and requiring reception of detailed event data, the system sends concise alarm messages that trigger devices to wake up only when necessary. This extraction of the core alerting function enables power savings while maintaining reliability for critical events.
2Reliability
If alarm messages are broadcast at higher frequencies, then event notification reliability is improved, but resource overhead increases
Solution Approach 1:
The patent segments communication into two distinct parts: brief alarm messages and detailed event information. Alarm messages are transmitted frequently at predefined intervals to ensure reliable notification, while complete event data is transmitted only when requested or necessary. This segmentation allows high-frequency alarm broadcasting without proportionally increasing overall resource overhead.
Solution Approach 2:
The patent changes the transmission parameters by using compact, standardized alarm message formats with fixed lengths and predefined structures. By optimizing message size and using efficient encoding schemes, the system achieves high broadcast frequency with minimized resource consumption per message, balancing reliability requirements against overhead constraints.
Data Source
AI summary
Disclosed is a method for transmitting and receiving an alarm in V2X communication so as to prevent waste of power and radio resources. The method for transmitting and receiving an alarm according to the present invention involves transmitting an alarm message containing the rating information of an actual event, prior to transmitting a message containing information of the event. On the basis of the rating, a receiving end can decide whether or not to receive a subsequent message, thereby saving power.