Dynamic Message Frequency Adjustment in Vehicular Networks
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Solution Overview
Problem
Current vehicular network systems face channel congestion issues due to predetermined message transmission intervals, which can limit the generation frequency of emergency messages with high priority, leading to increased latency and potential safety hazards.
Innovation Solution
A system and method for dynamically adjusting message generation frequency in vehicular networks, which includes a message receiving module, a need determination module, an emergency determination module, and an adjustment module to assess and adjust message frequency based on the emergent degree of events, ensuring that emergency messages are transmitted promptly without overwhelming the channel with low-priority messages.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If predetermined transmission intervals are used for periodic messages, then channel congestion is prevented through load control, but emergency message transmission frequency and immediacy are limited
Solution Approach 1:
The patent implements dynamic adjustment of message generation frequency based on event urgency levels. The system transitions from static predetermined intervals to dynamic frequency adjustment, where emergency messages with high urgency can increase their transmission frequency above standard limits while non-emergency messages maintain lower frequencies. This resolves the contradiction by making the transmission system adaptive rather than fixed.
Solution Approach 2:
The system changes the transmission frequency parameter dynamically based on event type and urgency level. Different parameter sets are applied: standard frequency for routine messages, increased frequency for urgent messages, and maximum frequency for emergency messages. This allows the system to optimize transmission timing for each message type, ensuring emergency messages meet frequency requirements while preventing overall channel congestion.
2Loss of time
If message generation frequency is increased to ensure emergency message immediacy, then driver reaction time is improved, but channel congestion increases due to low-priority messages occupying bandwidth
Solution Approach 1:
The patent applies different transmission frequency qualities to different message types based on their priority and urgency. Emergency messages receive high-frequency transmission channels while non-emergency messages use lower-frequency channels. This local differentiation ensures that critical messages reach drivers immediately without low-priority messages consuming valuable bandwidth, thus resolving the contradiction between reaction time and channel congestion.
Solution Approach 2:
The system introduces an intermediary message priority classification mechanism that mediates between emergency and non-emergency messages. This intermediary layer assigns urgency levels and routes messages through appropriate frequency channels, preventing low-priority messages from overwhelming the system while ensuring emergency messages achieve required transmission frequency for timely driver response.
3Adaptability or versatility
If minimum update frequency is predetetermined for all message types, then channel load is controlled, but the system cannot adapt to varying emergency degrees of different events
Solution Approach 1:
The patent segments the message transmission system into multiple priority levels and urgency categories. Messages are divided into standard, urgent, and emergency segments, each with predetermined frequency ranges. This segmentation allows the system to adapt to different event urgencies without requiring complex real-time analysis, as each segment has pre-defined transmission parameters. The complexity is managed through structured classification rather than unstructured adaptability.
Solution Approach 2:
The system performs preliminary classification of messages into urgency levels before transmission. Message priorities and minimum update frequencies are predetermined based on event type characteristics. This preliminary action allows the system to adapt to varying emergency degrees without complex real-time decision-making, as the frequency adjustment rules are pre-established for different message categories, reducing operational complexity while maintaining high adaptability.
Data Source
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AI summary
A method of dynamic adjusting a generation frequency of messages in vehicular networks is provided, including: receiving updating requests and emergent degree of the vehicle event, and then determining whether the generation frequency of messages meets the dynamic change of the vehicle, if not satisfied, selecting a different adjustment method according to the event emergent degree. When the event is emergent, its generation frequency can be raised immediately by an interruptive adjustment and to suppress the generation frequency of messages of the others. Conversely, adjusting its generation frequency by a progressive adjustment and reducing the generation frequency of messages of the other lower-priority vehicles. According to the present disclosure, it prevents lower priority messages from occupying the channel overly, and emergency messages with higher priority can be satisfied immediately when it needed.