PDCCH Monitoring Using Concatenated CCE Indexes for Coverage
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Solution Overview
Problem
In 5G NR communication, PDCCH coverage needs enhancement in scenarios such as IoT, high-frequency licensed/unlicensed bands due to limited resources, signal fading, and restricted Power Spectral Density, respectively.
Innovation Solution
Enhance PDCCH coverage by increasing resources in Control Resource Sets (CORESETs) through concatenating Control Channel Element (CCE) indexes across multiple CORESETs, thereby expanding the number of resource blocks and CCEs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If PDCCH resources are increased in narrowband scenarios, then PDCCH coverage is improved, but device complexity and resource allocation overhead increase
Solution Approach 1:
The patent segments the CORESET into multiple types (first type and second type) with different resource configurations. The first type CORESET is designed for narrowband scenarios with enhanced PDCCH coverage, while the second type is for standard scenarios. This segmentation allows the system to apply appropriate resource allocation strategies for different deployment scenarios without increasing complexity across all scenarios.
Solution Approach 2:
The patent applies local quality by configuring different CORESET parameters locally according to scenario requirements. In narrowband scenarios, the first type CORESET uses specific resource block allocations and CCE index ranges optimized for limited bandwidth. This localized optimization improves PDCCH coverage where needed without affecting other scenarios.
2Reliability
If CCE indexes are concatenated across multiple CORESETs, then PDCCH reception success probability is improved, but resource allocation complexity increases
Solution Approach 1:
The patent merges resource allocation across multiple CORESETs by concatenating CCE indexes from different CORESETs to form a unified search space for PDCCH monitoring. This merging allows the terminal to monitor PDCCH candidates across aggregated resources from multiple CORESETs, improving reception success probability through increased resource diversity while maintaining structured allocation rules.
3Reliability
If aggregation level is increased to enhance PDCCH coverage, then coverage area is improved, but resource consumption increases
Solution Approach 1:
The patent implements dynamic resource allocation where the aggregation level and CORESET type are adjusted based on scenario requirements. In narrowband scenarios with limited resources, the system dynamically selects appropriate aggregation levels and CORESET configurations to achieve necessary coverage without excessive resource consumption. This dynamic adaptation allows optimal trade-off between coverage and resource usage.
Data Source
AI summary
A PDCCH monitoring method and apparatus, and a storage medium and a terminal are provided. The method comprises: monitoring a PDCCH in a first type of Control Resource Set (CORESET), or a PDCCH in resources where Control Channel Element (CCE) indexes are concatenated in a plurality of CORESETs.