Sidelink Resource Selection via Priority-Based RSRP Thresholds
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Solution Overview
Problem
In LTE-V2X communication, UEs face challenges in selecting suitable sidelink resources due to erroneous derivation of Physical Sidelink Shared Channel (PSSCH) RSRP thresholds, leading to resource collisions and reduced communication performance.
Innovation Solution
A priority threshold selection equation is defined as i=(a−1)*8+b, where 'a' is the transmit priority and 'b' is the receive priority, to correctly determine the PSSCH RSRP threshold for resource exclusion, ensuring appropriate resource selection and improving V2X communication performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If UEs perform resource sensing to identify reserved resources, then resource collision is avoided, but measurement precision of PSSCH RSRP threshold is reduced due to erroneous derivation
Solution Approach 1:
The patent applies parameter changes by introducing a priority-based threshold selection mechanism. Instead of using a fixed or incorrectly derived RSRP threshold, the system dynamically selects appropriate threshold values based on the priority levels of transmitting and receiving UEs. This resolves the measurement precision issue by ensuring that the correct threshold is used for resource exclusion decisions, thereby maintaining both collision avoidance reliability and accurate threshold measurement.
2Productivity
If UEs select unused resources autonomously, then communication performance is improved, but resource collisions occur due to incorrect threshold derivation
Solution Approach 1:
The patent implements feedback through the priority threshold selection equation i=(a-1)*8+b, where the system continuously monitors transmission and reception priorities and adjusts the RSRP threshold accordingly. This feedback mechanism ensures that UEs make informed resource selection decisions based on current priority conditions, preventing collisions while maintaining high communication performance through autonomous resource selection.
3Measurement precision
If priority threshold selection equation i=(a-1)*8+b is used, then resource selection accuracy is improved, but device complexity increases
Solution Approach 1:
The patent applies self-service by enabling UEs to autonomously calculate and select their own priority-based RSRP thresholds using the equation i=(a-1)*8+b. Each UE independently determines its transmission priority 'a' and reception priority 'b', then computes the corresponding threshold index without requiring complex network coordination or additional signaling. This self-service approach improves resource selection accuracy while minimizing device complexity by using a straightforward mathematical relationship.
Data Source
AI summary
A data transmission method, a data transmission device, non-transitory computer readable medium, and a chip for sidelink communication.