Dedicated Resource Pool for High-Priority V2X Message Transmission
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Solution Overview
Problem
In wireless communication systems, particularly in V2X operations, high-priority messages with large payload sizes or long transmission periods face challenges due to collisions in time/frequency transmission resource positions between different user devices, leading to instability in D2D communication.
Innovation Solution
A method is introduced where a dedicated resource pool is allocated for high-priority V2X messages, allowing for the selection of resource regions that minimize collisions by using pre-configured offset values and energy detection to ensure stable transmission, and configuring resource pools with larger resources for high-priority messages compared to low-priority ones.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a common resource pool is used for transmitting V2X messages of different priorities, then resource allocation is simple, but transmission reliability of high-priority messages deteriorates due to collisions
Solution Approach 1:
The patent divides the common resource pool into multiple dedicated resource pools based on message priority levels. High-priority V2X messages are allocated to specific dedicated resource pools that are separated from low-priority message resources. This segmentation prevents collisions between different priority messages and ensures reliable transmission of critical high-priority communications while maintaining manageable resource allocation through clear demarcation.
2Reliability
If transmission resources are increased for high-priority messages, then transmission reliability improves, but resource allocation complexity increases
Solution Approach 1:
The patent applies local quality by configuring dedicated resource pools with specific characteristics tailored to high-priority message requirements. These dedicated pools are positioned in time-frequency domains with optimized parameters such as larger resource blocks, adjusted subcarrier spacing, or specific time offsets that are locally optimized for reliable high-priority transmission, while low-priority messages use standard resource configurations.
3Ease of operation
If random resource selection is used for V2X transmission, then device operation is simple, but collision probability increases reducing communication stability
Solution Approach 1:
The patent implements preliminary action by pre-configuring dedicated resource pools for high-priority messages before transmission occurs. The network or system establishes these dedicated time-frequency resources in advance, and high-priority messages are directed to these predetermined resources. This preliminary allocation eliminates the need for random selection at transmission time, ensuring stable and collision-free communication while maintaining simple device operation through straightforward resource mapping.
Data Source
AI summary
The present invention provides a vehicle-to-x (V2X) operating method performed by a terminal in a wireless communication system, the method comprising: being allocated a (dedicated) resource pool used for transmission of a V2X message having a relatively high priority, wherein the (dedicated) resource pool includes a plurality of resource areas; and transmitting the V2X message having the high priority on the basis of the (dedicated) resource pool.