PDCCH Monitoring Occasion Shifting for Multi-Slot CSS Scheduling
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently managing multi-slot PDCCH monitoring due to short OFDM symbol durations with large subcarrier spacings, leading to increased processing demands on user equipment (UE) and potential latency issues.
Innovation Solution
The proposed solution involves monitoring physical downlink control channels (PDCCHs) in a Type0-PDCCH common search space (CSS) over one or two consecutive slots with 480 kHz or 960 kHz subcarrier spacing, allowing for UE capability reporting and monitoring occasion shifting to optimize PDCCH monitoring configurations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multi-slot PDCCH monitoring is implemented with large subcarrier spacing (480 kHz or 960 kHz), then system information scheduling efficiency is improved, but processing demands on user equipment increase and latency issues occur
Solution Approach 1:
The patent divides the monitoring process into two distinct groups: Type0-PDCCH CSS sets monitored over one or two consecutive slots, and other SS sets monitored according to traditional single-slot methods. This segmentation allows the UE to apply optimized multi-slot monitoring only where beneficial while maintaining legacy operation elsewhere, thereby improving scheduling efficiency without uniformly increasing processing demands across all PDCCH monitoring scenarios.
Solution Approach 2:
The patent introduces dynamic monitoring occasion (MO) shifting capability where the network can configure UEs to shift monitoring occasions for Type0-PDCCH CSS sets based on multi-slot configurations. This dynamic adjustment allows the system to adapt monitoring timing to specific scenarios, optimizing scheduling efficiency while giving UEs flexibility to manage their processing loads by skipping certain monitoring occasions when not required.
2Productivity
If multi-slot PDCCH monitoring is implemented with large subcarrier spacing, then system information scheduling efficiency is improved, but latency issues occur
Solution Approach 1:
By segmenting Type0-PDCCH CSS monitoring from other SS set monitoring, the patent enables targeted multi-slot monitoring only for system information-related PDCCH transmissions. This selective approach improves scheduling efficiency for critical system information while avoiding extended latency for other control channels that could be monitored with shorter intervals in traditional single-slot configurations.
Solution Approach 2:
The patent establishes periodic monitoring patterns where UEs monitor Type0-PDCCH CSS sets over one or two consecutive slots at configured intervals. This periodic multi-slot monitoring provides regular system information updates with predictable timing, improving scheduling efficiency while preventing continuous monitoring from causing excessive latency accumulation through systematic time-spacing of monitoring occasions.
3Productivity
If monitoring occasion shifting is implemented for Type0-PDCCH CSS sets, then PDCCH monitoring efficiency is improved, but device complexity increases
Solution Approach 1:
The network performs preliminary configuration by providing RRC parameters that define multi-slot monitoring patterns, monitoring occasion shifts, and associations between Type0-PDCCH CSS sets and SSBs. By pre-configuring these parameters, the network prepares the UE in advance with all necessary information to execute efficient monitoring without requiring complex real-time decision-making at the UE, thereby improving monitoring efficiency while keeping device complexity manageable through standardized configuration procedures.
Data Source
AI summary
The application describes technologies associated with performing monitoring occasion shifting operations in wireless communications.