NR Sidelink Resource Exclusion for IBE Interference Mitigation
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Solution Overview
Problem
In-band emission (IBE) interference and resource pool utilization inefficiencies in new radio (NR) sidelink communication due to power imbalances and uneven geographical distribution of user equipment (UEs), leading to transmission collisions and degraded quality of service.
Innovation Solution
A user equipment and method for resource exclusion and selection in NR sidelink communication, involving a processor that performs resource sensing, determines an initial candidate resource set, excludes sidelink resources with significant power imbalances, and selects resources adjacent to reserved ones to mitigate IBE interference and optimize resource utilization without relying on geographical zoning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If resource pool zoning based on geographical location is implemented, then IBE interference is mitigated, but device complexity and implementation complexity increase
Solution Approach 1:
The patent extracts the harmful IBE interference effect by identifying and excluding specific resources that would cause significant power imbalances. Instead of implementing complex geographical zoning, the system extracts only the problematic resources based on sensed power levels and excludes them from the candidate resource set, thereby mitigating IBE interference without requiring geographical location information or complex zoning mechanisms.
Solution Approach 2:
The patent introduces an intermediary sensing and exclusion mechanism that acts as a mediator between resource selection and IBE interference mitigation. The UE performs sensing to detect power levels on potential resources, uses this information to identify resources that would cause IBE interference, and excludes them before final resource selection. This intermediary process achieves interference mitigation without requiring complex geographical zoning or location information.
2Area of stationary object
If maximum transmission power is used to extend communication range, then coverage is improved, but IBE interference increases
Solution Approach 1:
The patent applies preliminary action by performing resource sensing and exclusion before final resource selection and transmission. The UE proactively identifies resources that would cause IBE interference by sensing power levels on potential resources and excluding them from the candidate set. This preliminary exclusion ensures that when the UE transmits at maximum power to extend coverage, it does not select resources that would create harmful IBE interference to other UEs.
3Productivity
If resource sensing and exclusion procedures are implemented, then resource utilization efficiency is improved, but processing time and complexity increase
Solution Approach 1:
The patent applies partial action by implementing resource sensing and exclusion only for resources that are likely to cause IBE interference, rather than processing all resources in the pool. The system senses power levels on potential resources and excludes only those that would create significant power imbalances (e.g., more than 3 dB difference). This selective approach improves resource utilization efficiency by avoiding IBE interference while minimizing additional processing time compared to comprehensive resource analysis.
Data Source
AI summary
A user equipment and a method for resource exclusion and selection in new radio sidelink communication of the same are provided. The method includes performing within a sidelink sensing period a resource sensing procedure, determining an initial candidate resource set within a resource selection window based on a sensing result from performing the resource sensing procedure, excluding a sidelink resource from the initial candidate resource set to form an updated candidate resource set, and performing selection of a sidelink resource from the updated candidate resource set.