NR Sidelink Resource Selection for PUE Preemption Protection
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Solution Overview
Problem
The preemption mechanism in New Radio (NR) sidelink resource allocation degrades the performance of pedestrian UE (PUE) by allowing higher priority vehicles (VUE) to preempt their resources, affecting packet transmission reliability and efficiency.
Innovation Solution
A resource selection method and apparatus for UE that considers priority information, measurement results, and UE type to determine a candidate resource set and select a target resource, enhancing PUE's resource selection process to mitigate preemption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the preemption mechanism is implemented in NR sidelink resource allocation, then higher priority services can preempt resources of lower priority services, but the performance of PUE is degraded
Solution Approach 1:
The patent applies local quality by differentiating resource selection based on UE type. PUE is configured with specific exclusion rules that prevent resource preemption, while VUE follows standard preemption mechanisms. This localized differentiation ensures that PUE resources are protected while maintaining overall system productivity.
Solution Approach 2:
The patent inverts the standard preemption logic by making PUE the exception rather than the rule. Instead of allowing all UEs to preempt resources based on priority, the system inverts the approach by defaulting to preemption protection for PUE through specific exclusion rules, thereby protecting PUE reliability while maintaining system-wide resource allocation efficiency.
2Adaptability or versatility
If VUE and PUE use the same resource pool with preemption mechanism, then resource utilization is improved, but PUE performance degrades due to resource preemption
Solution Approach 1:
The patent implements local quality by applying different resource selection behaviors to different UE types within the same resource pool. PUE is configured with exclusion rules that identify and exclude resources reserved by other UEs, while VUE operates with standard preemption behavior. This allows both UE types to share the resource pool while protecting PUE performance.
Solution Approach 2:
The patent introduces an intermediary mechanism in the form of exclusion rules that mediate between VUE and PUE resource usage. These rules act as a filter that prevents VUE from preempting PUE resources while allowing normal resource pool sharing. The intermediary exclusion rules enable coexistence by translating the conflict into a coordinated resource selection process.
3Adaptability or versatility
If resource preemption is allowed in NR sidelink, then resource allocation flexibility is enhanced, but the number of resource re-selections for PUE increases
Solution Approach 1:
The patent applies preliminary action by having PUE perform exclusion rule checks before finalizing resource selection. By proactively identifying and excluding resources that may be preempted or reserved by other UEs, PUE avoids subsequent resource conflicts and re-selections. This preliminary filtering action reduces the need for frequent resource re-selections while maintaining allocation flexibility.
Solution Approach 2:
The patent implements feedback through the exclusion rule mechanism that provides information about resource availability and reservation status. PUE uses this feedback to make informed resource selection decisions, avoiding resources that would lead to preemption or conflicts. This feedback loop reduces unnecessary resource re-selections by guiding PUE toward stable, conflict-free resource choices.
Data Source
AI summary
The embodiments of this disclosure provide a resource selection method and apparatus, and user equipment. The method includes: determining, in a case that a predetermined condition is met, a candidate resource set according to resource information of first resources in a resource selection window; and selecting a target resource from the candidate resource set, where the predetermined condition includes at least one of the following: the UE detects a reserved resource of UE of a first type, or the UE is UE of a first type; and the resource information includes at least one of the following: priority information, a measurement result, a measurement threshold, or a UE type of UE to which the first resource belongs.