UE-Specific PDCCH Paging Control for NR-RedCap Devices
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Solution Overview
Problem
Existing 5G NR systems face challenges in accommodating Reduced Capability UEs (NR-lite) due to limitations in flexibility and resource allocation for paging control messages, as they are designed primarily for high-end terminals, failing to meet the requirements of low-cost, low-complexity, and power-saving mid-range IoT devices.
Innovation Solution
The method involves transmitting PDCCH signaling tailored to different UE types, using distinct PDCCH signaling configurations, including scrambling sequences, resource allocation, and monitoring parameters to ensure that Reduced Capability UEs and non-Reduced Capability UEs receive their respective paging control messages efficiently, thereby enhancing flexibility and reducing coupling between different types of UEs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a unified PDCCH signaling configuration is used for all UE types, then device complexity is reduced and ease of operation is improved, but adaptability to different UE capabilities deteriorates and communication efficiency for Reduced Capability UEs worsens
Solution Approach 1:
The patent segments the PDCCH signaling configuration into UE-type-specific configurations. Different PDCCH configurations are defined for Reduced Capability UEs versus non-Reduced Capability UEs, allowing each UE type to receive optimized paging control messages tailored to its capabilities. This segmentation resolves the contradiction by improving adaptability while managing complexity through structured differentiation.
Solution Approach 2:
The patent applies local quality by assigning different PDCCH signaling parameters (such as monitoring occasions, search space configurations, and aggregation levels) specifically to Reduced Capability UEs based on their local constraints. This allows the system to optimize paging delivery for each UE type according to its specific capabilities rather than applying a uniform configuration, thereby improving adaptability without requiring complete system-wide complexity.
2Reliability
If PDCCH signaling is optimized for high-end terminals, then communication efficiency for non-Reduced Capability UEs is improved, but adaptability to Reduced Capability UEs deteriorates and they fail to receive paging messages reliably
Solution Approach 1:
The patent segments paging control mechanisms into UE-type-specific PDCCH configurations, ensuring that Reduced Capability UEs receive paging control messages optimized for their reliability requirements. This segmentation allows each UE type to have dedicated optimization strategies, improving overall reliability across diverse UE capabilities while maintaining compatibility through structured differentiation.
Solution Approach 2:
The patent employs parameter changes by adjusting PDCCH signaling parameters (such as monitoring periodicity, search space configurations, and aggregation levels) specifically for Reduced Capability UEs. These parameter modifications ensure that paging control messages are transmitted with appropriate reliability guarantees for each UE type, resolving the contradiction between reliability and adaptability through targeted parameter optimization.
3Productivity
If Reduced Capability UEs use the same PDCCH monitoring parameters as non-Reduced Capability UEs, then device complexity is reduced, but power consumption increases and communication efficiency deteriorates
Solution Approach 1:
The patent applies local quality by defining UE-type-specific PDCCH monitoring parameters, allowing Reduced Capability UEs to use optimized monitoring configurations tailored to their capabilities. This enables more efficient paging reception for each UE type according to their specific requirements, improving communication efficiency while managing complexity through structured differentiation rather than uniform configuration.
Solution Approach 2:
The patent implements parameter changes by modifying PDCCH monitoring parameters (such as monitoring occasions, search space configurations, and aggregation levels) specifically for Reduced Capability UEs. These parameter adjustments optimize paging control message reception efficiency for each UE type, resolving the contradiction between productivity and device complexity through targeted parameter optimization.
Data Source
AI summary
A method for transmitting a paging control message performed by a base station includes: transmitting a Physical Downlink Control Channel (PDCCH) signaling corresponding to a user equipment (UE) type of a UE based on the UE type. The PDCCH signaling carries a paging control message for the UE, different UE types correspond to different PDCCH signaling, and the paging control message is configured to indicate scheduling information of a paging message.