Sensor Sharing Message Compression for Wireless Congestion
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Solution Overview
Problem
Wireless communication networks face congestion and latency issues due to the transmission of repetitive sensor sharing messages (SSMs) in dense traffic conditions, which can delay important information such as emergency alerts.
Innovation Solution
A two-step SSM transmission technique is implemented, where devices selectively compress SSMs based on channel busy rate and number of detected objects, excluding certain extension data, and request extension data only when necessary, to reduce redundant data transmission and resource usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If devices transmit complete SSMs including all extension data, then information completeness is improved, but channel congestion and latency increase
Solution Approach 1:
The SSM transmission is divided into two segments: a basic SSM containing essential information (device data and object detection data) and an extension data portion. Devices selectively transmit only the basic SSM under normal conditions, and only transmit extension data when explicitly requested by receiving devices, thereby segmenting the information flow to reduce latency while preserving information completeness when needed.
Solution Approach 2:
The SSM transmission format is made dynamic and adaptive based on network conditions and specific requirements. The message structure transitions between a compact basic format and an extended format with additional data, allowing the system to optimize between latency and information completeness dynamically rather than using a fixed transmission format.
2Loss of information
If devices transmit complete SSMs with all extension data, then data accuracy is improved, but channel congestion worsens
Solution Approach 1:
Extension data is extracted from the main SSM transmission and handled separately through a request-response mechanism. Receiving devices that need additional accuracy can request specific extension data for particular objects, and transmitting devices provide only those specific extensions rather than all extension data, thereby maintaining data accuracy where needed while preserving channel capacity.
3Reliability
If devices transmit SSMs frequently in dense traffic, then detection coverage is improved, but network congestion increases
Solution Approach 1:
Devices transmit partial SSM information (basic data without extension data) frequently in dense traffic conditions. This partial transmission approach maintains detection coverage and situational awareness by ensuring receiving devices get essential information regularly, while avoiding the excessive action of transmitting complete extension data every time, thereby preserving network throughput.
Data Source
AI summary
A method of wireless communication includes transmitting, by a first device, a sensor sharing message (SSM) associated with a vehicle communication network. The SSM includes first data associated with the first device and further includes second data indicating one or more objects detected by the first device. The method further includes, in response to transmitting the SSM, receiving, by the first device from a second device, an extension request for extension data associated with at least a first object of the one or more objects.