NR-U UE Capability Signaling for CORESET RB Offset Allocation
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Solution Overview
Problem
Existing 5G NR systems operating in unlicensed spectrum face challenges in resource allocation due to Listen-Before-Talk mechanisms, requiring flexible enhancements for Control Resource Set (CORESET) and Physical Uplink Shared Channel (PUSCH) allocations, which vary by region and necessitate additional UE implementation efforts.
Innovation Solution
A method for UE capability signaling that allows UEs to transfer information indicating support for CORESET configuration with a Resource Block (RB) offset and monitoring occasions, as well as resource allocation within configured grants in unlicensed spectrum, enabling efficient PDCCH candidate monitoring and UL grant-free transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If Listen-Before-Talk mechanism is implemented in unlicensed spectrum, then channel availability uncertainty is introduced, but flexible resource allocation enhancements are required
Solution Approach 1:
The patent implements dynamic resource allocation for PDCCH monitoring by allowing the UE to adaptively adjust monitoring occasions and CORESET configurations based on LBT outcomes and channel availability. The network can dynamically configure monitoring patterns and RB offsets to match actual unlicensed spectrum conditions, making the system flexible without requiring complex UE implementation for all possible scenarios.
Solution Approach 2:
The patent changes key parameters such as PDCCH monitoring occasions, CORESET resource block offsets, and search space configurations to adapt to unlicensed spectrum conditions. By modifying these parameters dynamically based on LBT results and channel availability, the system achieves flexibility while keeping UE implementation manageable through standardized parameter adjustment mechanisms.
2Productivity
If region-specific resource allocation enhancements are implemented, then transmission efficiency is improved, but additional UE implementation efforts are required
Solution Approach 1:
The patent creates a universal resource allocation framework that can operate in both licensed and unlicensed spectraum through common signaling mechanisms. The same RRC signaling and parameter structures are used across different deployment scenarios, allowing UEs to efficiently transmit in unlicensed spectrum without requiring separate region-specific implementation logic, thus maintaining high transmission efficiency while minimizing UE complexity.
3Productivity
If PDCCH candidate monitoring is performed according to resource allocation configuration, then resource utilization is optimized, but frequency domain resource alignment is required
Solution Approach 1:
The patent performs preliminary alignment of frequency domain resources by configuring RB offsets and resource block assignments before PDCCH monitoring begins. The network pre-calculates and signals the optimal resource alignment parameters through RRC configuration, ensuring that when the UE starts monitoring, the frequency domain resources are already properly aligned with the unlicensed spectrum allocation, thus optimizing resource utilization while maintaining precise alignment.
Data Source
AI summary
A method for UE capability signaling to support enhancements on resource allocation for Physical Downlink Control Channel (PDCCH) candidate monitoring in NR-U is proposed. A UE transfers UE capability information to a mobile communication network. The UE capability information includes information indicating whether the UE supports Control Resource Set (CORESET) configuration with a Resource Block (RB) offset. The UE receives resource allocation configuration of an unlicensed cell from the mobile communication network. The UE monitors PDCCH candidates on the unlicensed cell according to the resource allocation configuration.