Roadside Node Dynamic Channel Selection for V2X Congestion
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Solution Overview
Problem
Current Vehicle-to-Everything (V2X) communication systems face challenges in efficiently managing data transmission between sidelink and adhoc radio channels, leading to congestion and interference, which affects the reliability and quality of information exchange in vehicular networks.
Innovation Solution
A roadside network node equipped with processors, memory, and dual radio modules for cell-supported and adhoc radio communications, dynamically selects the most suitable channel for data transmission based on service quality, congestion, and target propagation range, and adjusts repetition rates to optimize resource utilization and reduce interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If data is transmitted via both sidelink and adhoc radio channels simultaneously, then transmission reliability is improved, but channel congestion and interference increase
Solution Approach 1:
The system dynamically selects between sidelink and adhoc radio channels based on real-time channel conditions, transmission requirements, and congestion levels. The selection is not static but adapts to changing network states, allowing the system to maintain reliability while avoiding congestion by switching channels as needed
Solution Approach 2:
Different transmission modes (sidelink vs adhoc) are applied to different data types, service requirements, and channel conditions. Critical safety messages may use one channel while non-critical data uses another, allowing localized optimization of transmission quality for different traffic types
2Reliability
If transmission repetition rate is increased to ensure message delivery, then service quality is improved, but resource utilization efficiency deteriorates
Solution Approach 1:
The system changes transmission parameters including repetition rate, modulation scheme, and coding rate based on channel conditions and message priority. When channel quality is good, repetition rate is reduced; when quality degrades, repetition rate increases dynamically, optimizing the balance between reliability and resource efficiency
Solution Approach 2:
Full repetition of transmissions is applied only when necessary based on channel conditions and message criticality. Non-critical messages use minimal repetitions while critical safety messages receive enhanced repetition, avoiding unnecessary resource consumption for messages that don't require it
3Device complexity
If channel selection is made statically, then system complexity is reduced, but adaptability to changing channel conditions deteriorates
Solution Approach 1:
The channel selection mechanism transitions from static to dynamic, continuously monitoring channel quality metrics such as signal strength, interference levels, and congestion status. The system adapts its transmission channel choices in real-time based on these measurements, maintaining low complexity through standardized measurement and selection procedures
Data Source
AI summary
A method to operate a road-side network node in a cell-supported radio communications network and in an adhoc radio communications network is provided. The method includes providing data to be transmitted; and determining a transmission instruction for the data, the transmission instruction including a channel selection indicating a) a transmission of the data via a sidelink radio channel of the cell-supported radio communications network, b) a transmission of the data via an adhoc radio channel of the adhoc radio communications network, or c) a transmission of the data via the sidelink radio channel and the adhoc radio channel. The method also includes initiating a transmission of the data via the sidelink radio channel and/or via the adhoc radio channel according to the transmission instruction.