CPM Message Division via Object State Sorting
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Solution Overview
Problem
Current V2X communication systems face challenges in efficiently transmitting Collective Perception Service Messages (CPS) that exceed the Maximum Transmission Unit (MTU), limiting the effective sharing of surrounding vehicle information and requiring message division methods that ensure real-time and reliable communication.
Innovation Solution
A method for dividing the CPS message based on a virtual two-dimensional coordinate system, sorting data by location and distance, and transmitting it in segments, allowing for immediate use of object information without recombining divided messages, and calculating boundary values for accurate object positioning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If the CPM message includes complete data about all surrounding objects, then the information completeness is improved, but the message size exceeds the MTU and cannot be transmitted directly
Solution Approach 1:
The patent divides the large CPM message into multiple smaller segments, each fitting within the MTU limit. The message is segmented based on object location information, creating separate message parts that can be transmitted independently while collectively representing the complete surrounding environment data.
2Productivity
If the CPM message is divided into multiple parts, then the message can be transmitted within MTU limits, but the receiving device must recombine the parts to use the information
Solution Approach 1:
The patent performs preliminary sorting of objects based on their location information before dividing the message. This pre-organization allows the receiving device to process each message segment independently and immediately use the information without complex recombination operations, as the segments are already arranged in a usable sequence.
3Productivity
If objects are sorted by location information, then the message division becomes more organized and efficient, but additional processing is required to calculate and apply the sorting
Solution Approach 1:
The patent changes the parameter used for message division from simple sequential ordering to location-based sorting. By using spatial coordinates and distance metrics as sorting parameters, the system achieves more efficient message organization that reflects the physical layout of surrounding objects, enabling better information utilization at the receiving end.
Data Source
AI summary
According to the present specification, a collective perception service message (CPM) division method by a first V2X communication device may comprise the steps of: acquiring data related to neighboring objects; generating a CPM including data related to the neighboring objects by using data related to the neighboring objects; on the basis of a sorting type configured in the first V2X communication device, dividing the CPM when the size of the CPM exceeds a configured maximum transmission unit (MTU); and transmitting the divided CPM to a second V2X communication device, wherein the sorting type may be configured to partition an area in which the neighboring objects are located, by using calculated location information of the neighboring objects, with reference to a location of the first V2X communication device and on the basis of the CPM.