SL Communication Resource Management for Self-Preemption Avoidance
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Solution Overview
Problem
Existing SL communication systems face issues with 'self-preemption' due to legacy sensing procedures, leading to unnecessary resource exclusion and frequent resource reselection, particularly in Mode 2 resource allocation.
Innovation Solution
Modifying reporting conditions for reevaluation and preemption by considering hypothetical SL Control Information (SCI) and Reference Signal Receive Power (RSRP) measurements to avoid self-preemption, and introducing a modified sensing procedure to reduce unnecessary resource reselection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If legacy sensing procedures are used in SL communication, then resource allocation is performed, but self-preemption occurs leading to unnecessary resource exclusion and frequent resource reselection
Solution Approach 1:
The patent applies preliminary anti-action by introducing a preemption indication mechanism that proactively identifies and marks resources subject to preemption before actual preemption occurs. The receiving UE generates a preemption indication based on RSRP measurements and priority comparisons, which is then fed back to the transmitting UE. This allows the transmitting UE to avoid selecting resources that are likely to be preempted, thereby preventing self-preemption and reducing unnecessary resource reselection while maintaining reliable resource allocation.
2Reliability
If resource exclusion is performed based on legacy sensing, then resource conflicts are avoided, but unnecessary resource reselection increases
Solution Approach 1:
The patent implements preliminary action by having the receiving UE perform RSRP measurements and generate preemption indications in advance, before the transmitting UE needs to select resources. The preemption indication is prepared ahead of time based on measured RSRP values and priority thresholds, allowing the transmitting UE to efficiently filter out preempted resources without performing extensive real-time sensing and analysis, thus reducing resource reselection time while maintaining conflict avoidance.
3Reliability
If hypothetical SCI is used to exclude resources from second resource set, then self-preemption is avoided, but reporting complexity increases
Solution Approach 1:
The patent applies parameter changes by modifying the preemption indication generation process to consider multiple parameters including RSRP measurements, priority thresholds (prioTX, prioRX, priopre), and resource set configurations. The receiving UE dynamically adjusts the preemption indication based on these parameters, and the transmitting UE uses these changed parameters to update its resource selection. This parameter-based approach systematically avoids self-preemption while managing reporting complexity through structured parameter handling.
Data Source
AI summary
Systems and methods for wireless communications are disclosed herein. In some arrangements, a wireless communication device determines whether a resource of a first resource set excluded from a second resource set is associated with a valid priority, and in response to determining that the resource excluded from the second resource set is associated with the valid priority, the wireless communication device reports reevaluation of the resource to one or more higher layers.