CORESET Configuration for Reliable RedCap PDCCH Detection
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Solution Overview
Problem
Reduced capability user equipment (RedCap UE) in the NR system struggles with lower reception performance in detecting control information of downlink channels due to fixed CORESET configurations, hindering initial access procedures.
Innovation Solution
Configuring a flexible and reliable CORESET configuration method by separately or jointly determining CORESETs for RedCap UE, utilizing additional synchronization signals and adjusting time and frequency domain positions to enhance detection accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a fixed configuration mode of CORESET is used in the NR system, then the system maintains simplicity and standardization, but the reception performance of RedCap UE deteriorates due to lower bandwidth capability and fewer antennas
Solution Approach 1:
The patent applies dynamics by enabling the network device to flexibly configure CORESET parameters (such as frequency domain resources, time domain resources, and numerology) according to the specific capabilities of RedCap UE. This allows the system to transition from a fixed configuration to a dynamic, adaptive configuration that matches the reduced bandwidth and antenna capabilities of RedCap devices, thereby improving reception performance without significantly increasing system complexity.
Solution Approach 2:
The patent implements parameter changes by modifying CORESET configuration parameters specifically for RedCap UE, including adjusting the frequency domain resource allocation, time domain resource allocation, and subcarrier spacing to suit the reduced capability requirements. These parameter adjustments enable RedCap UE to successfully detect PDCCH and complete initial access procedures while maintaining system-wide standardization.
2Ease of operation
If the same CORESET configuration is applied to both RedCap UE and non-RedCap UE, then configuration management is simplified, but RedCap UE cannot correctly detect control information due to decoding failures
Solution Approach 1:
The patent applies local quality by implementing differentiated CORESET configurations for different UE types. The network device identifies RedCap UE and applies specific configuration parameters tailored to their capabilities, while non-RedCap UE continue to use standard configurations. This localized adaptation ensures that RedCap UE can accurately detect control information without requiring complete reconfiguration of the system.
Solution Approach 2:
The patent segments the CORESET configuration space into different parameter sets for RedCap UE and non-RedCap UE. By dividing the configuration options and applying capability-based identification, the system maintains simple overall management while enabling precise, device-specific detection parameters that ensure successful initial access for RedCap devices.
3Ease of manufacture
If reduced capability UE with lower bandwidth capability and fewer antennas is used, then production cost and complexity are reduced, but initial access procedure reliability deteriorates
Solution Approach 1:
The patent addresses this contradiction by changing the system parameters (CORESET configuration) to match the reduced capabilities of RedCap UE. By adjusting frequency domain resources, time domain resources, and numerology parameters, the system enables reliable initial access for low-cost, reduced-capability devices without requiring them to meet full NR capability requirements.
Solution Approach 2:
The patent applies dynamics by enabling the network to adaptively configure resources based on UE capability reports. RedCap UE indicate their reduced capabilities, and the network dynamically adjusts CORESET parameters accordingly, ensuring that initial access reliability is maintained despite the reduced hardware capabilities of the devices.
Data Source
AI summary
Provided are a resource set configuration method, a detection method, a service node, a terminal and a storage medium. The resource set configuration method includes: configuring at least one control resource set (CORESET) corresponding to a target type terminal within one period or one time duration; and sending a physical downlink control channel (PDCCH) in the at least one CORESET.