Priority-Aware Sidelink Resource Conflict Signaling
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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 ambiguity in measuring RSRP from different UEs, 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, with RSRP thresholds set accordingly, and transmitting conflict information to specific UEs to optimize resource reselection, ensuring high-priority transmissions are protected.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If RSRP threshold is set based on transmission priority and reception priority combination, then resource conflict determination can be performed, but measurement accuracy deteriorates due to ambiguity in selecting which UE's RSRP to measure
Solution Approach 1:
The patent applies local quality by differentiating the RSRP measurement target based on the receiving UE's role. When the receiving UE is the intended receiver of the first UE's transmission, it measures RSRP from the second UE's SCI. When the receiving UE is the intended receiver of the second UE's transmission, it measures RSRP from the first UE's SCI. This localized adaptation of measurement targets resolves the ambiguity and improves both reliability and measurement precision.
2Reliability
If conflict information is transmitted to all UEs transmitting first SCI, then resource conflict can be notified, but system efficiency deteriorates due to unnecessary resource reselection by all UEs
Solution Approach 1:
The patent applies local quality by selectively transmitting conflict information based on the receiving UE's priority characteristics. The first UE determines whether to transmit conflict information to the second UE based on comparing their respective priorities. This selective approach ensures that only UEs that need to reselect resources receive conflict information, maintaining reliability while improving system efficiency by avoiding unnecessary reselection operations.
Solution Approach 2:
The patent extracts only the necessary conflict information transmission cases from the set of all possible UE interactions. By identifying and isolating the specific conditions under which conflict information should be transmitted (when priority comparison indicates resource conflict), the system avoids the inefficiency of broadcasting to all UEs while maintaining comprehensive conflict notification where needed.
3Adaptability or versatility
If RSRP threshold changes based on transmission priority value, then priority-based resource management is enabled, but determination accuracy deteriorates due to unclear setting rules
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting the RSRP threshold based on the combination of transmission priority and reception priority values. The threshold is calculated as a function of these priority parameters, allowing the system to adapt resource management to different priority scenarios while maintaining determination accuracy through a systematic and clear threshold setting rule.
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.