V2X Message Segment Filtering by Network Capacity Utilization
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing V2X communication systems face challenges in efficiently managing radio channel load, leading to potential discarding of high-priority messages during network congestion, which can compromise safety and efficiency in cooperative driving scenarios.
Innovation Solution
A method that filters and prioritizes message segments based on their relevance and the instantaneous network utilization, ensuring that high-priority messages, such as collision warnings, are transmitted while low-priority messages, like vehicle position updates, are minimized during network congestion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If V2X messages are transferred without filtering based on priority and network utilization, then the transfer of information is maintained, but the radio channel becomes overloaded resulting in higher packet error rate and higher latencies
Solution Approach 1:
The system dynamically changes the parameter of message selection by filtering message segments based on priority values and instantaneous network capacity utilization. This parameter-based filtering resolves the contradiction by adapting message transfer to current network conditions, ensuring high-priority messages are transmitted while low-priority messages are selectively dropped during congestion.
Solution Approach 2:
The message is segmented into multiple message segments, each with its own priority value. This segmentation allows the system to selectively filter individual message segments based on their priority and network conditions, rather than treating the entire message as a single unit. This resolves the contradiction by enabling fine-grained control over what information is transmitted under different network load conditions.
2Loss of information
If all message segments are transferred regardless of priority, then complete information is provided, but high-priority messages may be discarded during network congestion while low-priority messages are transmitted
Solution Approach 1:
Different message segments are assigned different priority values, creating local quality differences within the message structure. This allows the system to treat high-priority segments (such as collision warnings) differently from low-priority segments (such as position updates), ensuring that critical information is preserved while non-critical information can be dropped during congestion.
Solution Approach 2:
The system uses priority values as a parameter to dynamically determine which message segments to transmit. By changing the transmission parameter based on message priority and network conditions, the system ensures that high-priority information is reliably delivered while allowing flexibility in transmitting lower-priority information only when network capacity permits.
3Stability of the object's composition
If DCC protocol is used to control message transfer rate, then network stability is optimized, but the system cannot distinguish between high-priority and low-priority messages resulting in potential discarding of critical messages
Solution Approach 1:
The system segments messages into multiple priority-level message segments, allowing the DCC protocol to operate on a stabilized network while the priority-based filtering layer ensures critical messages are identified and transmitted. This segmentation resolves the contradiction by adding a priority-aware selection mechanism that works in conjunction with the stability-providing DCC protocol.
Solution Approach 2:
The system introduces priority values as an additional parameter that modifies how messages are selected for transmission. While the DCC protocol controls the overall transfer rate to maintain network stability, the priority parameter ensures that high-priority message segments are preferentially selected for transmission within the available capacity, preventing discarding of critical messages.
Data Source
AI summary
A method for transferring a message in a communications network for communication between a road user and at least one further road user. The road user and the further road user each include an evaluation unit for transferring messages via the communications network. The method includes: receiving a first message in the evaluation unit, the first message including message segments, each including a priority value; determining an instantaneous capacity utilization of the communications network; filtering message segments to be transferred out of the first message, based on the priority values and the instantaneous capacity utilization of the communications network; and generating a second message including the message segments to be transferred, and sending the second message via the communications network.