Sidelink Resource Conflict Detection Using Priority-Based RSRP Thresholds
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In wireless communication systems, determining resource conflicts between user equipments (UEs) based on RSRP measurements is inaccurate due to unclear RSRP threshold settings and inconsistent determination of transmission priority values, leading to inefficient resource reselection and potential interference with high-priority transmissions.
Innovation Solution
A method for determining resource conflicts using RSRP measurements based on reception and transmission priority values, where the RSRP threshold is set according to the intended receiver of the physical sidelink shared channel, and conflict information is transmitted only to UEs with low priority, allowing efficient resource reselection and protecting high-priority transmissions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If RSRP threshold is set based on transmission priority value, then resource conflict determination can be performed, but the accuracy is reduced due to unclear threshold settings and inconsistent priority value determination
Solution Approach 1:
The patent changes the basis for RSRP threshold determination from transmission priority value to reception priority value. Specifically, the receiving UE determines the RSRP threshold based on the priority value indicated in the received SCI (reception priority) rather than its own transmission priority, which eliminates the inconsistency and improves determination accuracy while simplifying the threshold setting process
Solution Approach 2:
The patent introduces the reception priority value as an intermediary parameter that mediates between multiple UEs with different transmission priorities. The receiving UE uses this intermediary value to uniformly determine the RSRP threshold, avoiding direct comparison conflicts between UEs with different transmission priority settings
2Productivity
If conflict information is transmitted to all UEs, then resource reselection can be performed, but transmission overhead increases and low-priority UEs may interfere with high-priority transmissions
Solution Approach 1:
The patent applies local quality by differentiating the treatment of conflict information transmission based on UE priority. Instead of uniformly transmitting to all UEs, the system selectively transmits conflict information only to low-priority UEs (those with priority value greater than the indicated priority), allowing high-priority UEs to maintain their resource usage without interference while reducing overall transmission overhead
Solution Approach 2:
The patent segments the UE population into different priority groups based on the priority value in the SCI. This segmentation allows the system to apply different resource reselection rules to different segments: low-priority UEs receive conflict information and perform reselection, while high-priority UEs exclude themselves from reselection, thereby optimizing both efficiency and energy consumption
Data Source
AI summary
A method of a first user equipment (UE) to transmit information related to a conflict of a reserved resource in a wireless communication system comprises receiving, from a second UE, a first sidelink control information (SCI) related to a first reserved resource for a physical sidelink shared channel (PSSCH), receiving, from a third UE, a second SCI related to a second reserved resource for a PSSCH, determining a conflict between the first reserved resource and the second reserved resource, and transmitting, to the second UE or the third UE, information related to the conflict.