Resource Selection Threshold for V2X Signal Interference
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Solution Overview
Problem
In D2D communication for V2X, the use of a single threshold for PSSCH-RSRP leads to reduced signal-to-interference ratio, increased error rates, and decreased demodulation performance due to varying transmit powers and antenna gains between UEs.
Innovation Solution
A resource selection method that determines a target threshold based on specific parameters such as terminal type, power value, location information, and link loss of both the selecting and reserving UEs, allowing for dynamic adjustment of the threshold for optimal resource selection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a single threshold is used for PSSCH-RSRP in resource selection, then the resource selection process is simple and uniform, but the signal-to-interference ratio is reduced, error rates increase, and demodulation performance decreases due to varying transmit powers and antenna gains between UEs
Solution Approach 1:
The patent applies local quality by determining different threshold values for different UEs based on their specific characteristics. Each UE calculates its own threshold using its transmit power, antenna gain, and path loss parameters, rather than using a uniform threshold for all UEs. This localized approach ensures that each UE's resource selection is optimized for its specific transmission conditions, thereby improving signal-to-interference ratio and demodulation performance while maintaining operational simplicity through an automated calculation process
Solution Approach 2:
The patent implements parameter changes by dynamically adjusting the threshold parameter based on UE-specific parameters including transmit power, antenna gain, and path loss. The threshold is calculated as a function of these parameters, allowing it to adapt to varying transmission conditions. This dynamic parameter adjustment resolves the contradiction by enabling the threshold to reflect actual channel conditions and UE capabilities, thereby improving reliability without complicating the resource selection process
2Ease of manufacture
If a single threshold is used for PSSCH-RSRP, then the implementation is straightforward and consistent across all UEs, but error rates increase due to inadequate consideration of individual UE characteristics
Solution Approach 1:
The patent applies self-service by enabling each UE to autonomously determine its own threshold value based on its own transmission parameters and channel conditions. The UE calculates the threshold using its transmit power, antenna gain, and measured path loss, without requiring network configuration or inter-UE coordination. This self-determined threshold approach maintains implementation simplicity while significantly reducing error rates by accounting for individual UE characteristics in the resource selection process
3Reliability
If UE-specific parameters are considered for threshold determination, then the signal-to-interference ratio is enhanced and demodulation performance is improved, but the complexity of the resource selection process increases
Solution Approach 1:
The patent applies preliminary action by having UEs pre-determine their transmission parameters (transmit power, antenna gain) and path loss values before the resource selection process. These parameters are prepared in advance and stored, allowing the threshold calculation to be performed efficiently during resource selection without requiring complex real-time measurements or computations. This preliminary preparation reduces the computational complexity during the actual resource selection while still achieving improved demodulation performance through UE-specific threshold determination
Data Source
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AI summary
Embodiments of the present invention provide a resource selection method, including: determining, by a first terminal, at least one of second parameter information of a second terminal and configuration information; and determining, by the first terminal, a target threshold based on at least one of the configuration information, the second parameter information, and first parameter information of the first terminal, where the target threshold is used by the first terminal to perform resource selection. The embodiments of the present invention further provide a resource selection apparatus. In the present invention, a resource is selected by changing a target threshold based on different parameters. In this way, a signal-to-interference ratio is increased, an error rate is reduced, and a demodulation performance is improved.