V2X Collective Perception Message Fragmentation
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Solution Overview
Problem
Current vehicle-to-everything (V2X) communication systems, particularly in Cooperative Awareness (CA) services, are limited as they only share information about the V2X communication device itself, failing to provide comprehensive situational awareness that includes the presence and behavior of surrounding road users and objects, especially those without V2X communication capabilities.
Innovation Solution
A method and apparatus for transmitting collective perception messages (CPM) that include information on multiple detected objects, with the option to fragment these messages based on size, position, distance, or movement direction, ensuring efficient communication of sensor data and object information to enhance situational awareness and traffic management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If collective perception messages include information on multiple detected objects, then situational awareness is improved, but message size increases
Solution Approach 1:
The patent divides the collective perception message into multiple fragments based on object positions, distances, or movement directions. Each fragment contains information about a subset of detected objects, allowing the message to be transmitted in manageable parts that can be reassembled at the receiver to provide complete situational awareness.
2Productivity
If message fragmentation is performed, then transmission efficiency is improved, but device complexity increases
Solution Approach 1:
The message is automatically segmented into fragments based on predefined criteria such as object position, distance, or movement direction. This segmentation reduces the size of individual transmissions and improves efficiency while the systematic approach to fragmentation manages the complexity through standardized processing rules.
Solution Approach 2:
The patent changes the parameter of message organization by fragmenting based on different parameters (position, distance, movement direction) depending on the specific transmission needs. This allows flexible adaptation of the fragmentation strategy to optimize transmission efficiency for different scenarios without permanently increasing complexity.
3Reliability
If comprehensive object information is transmitted, then traffic safety is improved, but communication bandwidth consumption increases
Solution Approach 1:
By segmenting the comprehensive object information into multiple fragmented messages, the patent enables complete traffic safety information to be transmitted while managing bandwidth consumption. The fragmentation allows efficient use of communication resources while ensuring all necessary safety-critical information is conveyed through the combined fragments.
Data Source
AI summary
Disclosed herein is a method of transmitting a collective perception message (CPM) at a vehicle-to-everything (V2X) communication apparatus of a vehicle. A method of transmitting V2X message of a vehicle includes generating a collective perception (CP) message including information on a plurality of objects detected by the vehicle, determining whether to fragment the CP message depending on whether a size of the CP message is greater than a predefined size, fragmenting the CP message based on the plurality of detected objects, upon determining that the CP message is fragmented, and transmitting the fragmented CP messages. Each of the fragmented CP messages comprises at least one of header information, information on the vehicle or sensor information used to detect the plurality of objects, which is included in the CP message.