Group-Based PDCCH Monitoring for Slot Overbooking
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Solution Overview
Problem
In wireless communication systems with high carrier frequencies, the short slot length due to large subcarrier spacing leads to challenges in PDCCH monitoring, limiting scheduling flexibility and degrading power efficiency, as per-slot and per-span PDCCH monitoring capabilities are inadequate.
Innovation Solution
Implementing a new PDCCH monitoring capability over a group of multiple slots, with rules for determining which monitoring occasions to drop based on priority, to manage PDCCH candidates and non-overlapped CCEs, ensuring predictable UE behavior and improved communication reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If per-slot and per-span PDCCH monitoring capabilities are used, then monitoring precision is maintained, but scheduling flexibility is limited and power efficiency is degraded
Solution Approach 1:
The patent segments the monitoring capability from slot/span level to search space set level. By grouping multiple search space sets into sets and allowing selective monitoring/dropping at the set level rather than individual slot/span, the system achieves better adaptability while controlling power consumption through prioritized set selection.
Solution Approach 2:
The patent introduces dynamic prioritization rules for search space sets, where the UE can dynamically determine which sets to monitor or drop based on priority assignments. This dynamic adjustment allows the system to adapt to varying scheduling requirements while managing power efficiency through intelligent selection.
2Adaptability or versatility
If the total number of slots configured for PDCCH monitoring is increased, then scheduling flexibility is improved, but the UE cannot monitor all slots due to maximum monitored slots limitation
Solution Approach 1:
The patent applies preliminary action by pre-assigning priorities to different search space sets before monitoring decisions are made. This allows the UE to pre-determine which sets are most important, ensuring that when slot configuration exceeds monitoring capacity, high-priority sets are preserved and monitored while lower-priority sets are dropped.
Solution Approach 2:
The patent implements partial action by allowing the UE to monitor only a subset of configured search space sets when the total number of slots exceeds the maximum monitored slots capability. Instead of attempting to monitor all slots (excessive action), the system selectively monitors high-priority sets, achieving acceptable reliability through prioritized partial monitoring.
3Use of energy by moving object
If search space sets are dropped to manage monitoring capacity, then power efficiency is improved, but monitoring precision may be reduced
Solution Approach 1:
The patent applies local quality by differentiating between different search space sets through priority assignments. Instead of uniformly monitoring or dropping all sets, the system applies different treatment (monitor vs. drop) to different local regions (search space sets) based on their priority and importance, thereby maintaining monitoring precision for critical sets while improving power efficiency by dropping less critical ones.
Data Source
AI summary
Aspects of the present disclosure relate to wireless communications, and more particularly, to techniques for group-based physical downlink control channel (PDCCH) overbooking and dropping. One aspect provides a method for wireless communications by a user equipment (UE). The method generally includes: determining a total number of slots for physical downlink control channel (PDCCH) monitoring for a slot group is larger than a maximum number of monitored slots for the UE for the slot group; and, in response to the determination that the total number of slots for PDCCH monitoring is larger than the maximum number of monitored slots for the UE for the slot group, dropping a first group of search space (SS) sets, wherein the first group of SS sets is selected based on a priority of the first group of SS sets relative to other groups of SS sets.