V2X Resource Pool Allocation for Pedestrian UE Sensing Windows
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Solution Overview
Problem
In V2X communication, pedestrian UEs (P-UEs) face challenges in efficiently selecting transmission resources while minimizing battery consumption and interference with other terminals, particularly in scenarios where partial sensing and random selection are not allowed.
Innovation Solution
The proposed method involves reserving and efficiently selecting V2X communication resources by implementing a UE-specific sensing period and a method for selecting a transmission resource, which minimizes unnecessary radio resource occupation and maximizes efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a P-UE performs V2X communication with frequent resource selection, then communication reliability is improved, but battery consumption increases
Solution Approach 1:
The patent implements a sensing mechanism where the P-UE periodically monitors resource pools at specific intervals rather than continuously. The UE performs sensing in a sensing window before resource selection and uses a counter mechanism to determine when to sense again, creating a periodic action pattern that balances communication reliability with energy conservation by avoiding unnecessary continuous monitoring.
2Object-affected harmful factors
If a P-UE selects transmission resources conservatively, then interference with other terminals is reduced, but resource utilization efficiency decreases
Solution Approach 1:
The patent employs a feedback mechanism where the P-UE measures the RSSI (Received Signal Strength Indicator) of received signals in the resource pool and compares it against a threshold. Based on this feedback, the UE dynamically adjusts its resource selection - excluding resources with high interference (above threshold) while utilizing resources with acceptable interference levels (below threshold), thereby optimizing both interference reduction and resource utilization efficiency.
3Measurement precision
If a P-UE performs comprehensive sensing before resource selection, then resource selection accuracy is improved, but processing complexity increases
Solution Approach 1:
The patent divides the resource pool into multiple resource units (sub-channels and resource blocks) that can be independently sensed and evaluated. The UE segments the sensing process by measuring RSSI for each resource unit separately and maintaining a list of excluded resources, rather than treating the entire resource pool as a single unit. This segmentation improves measurement precision while managing processing complexity through structured organization.
Data Source
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AI summary
The present invention provides a vehicle-to-X (V2X) operation method performed by a V2X terminal in a wireless communication system, the method comprising: allocating a V2X resource pool to a subframe remaining after excluding a specific subframe; and performing a V2X communication on the allocated V2X resource pool.