PDCCH Span Pattern Monitoring for UE Scheduling Delay Limits
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Solution Overview
Problem
The existing PDCCH monitoring capability in NR systems is limited to a slot level, leading to scheduling delays in URLLC scenarios without significant complexity increases, and the non-uniform distribution of PDCCH resources hinders optimal utilization of UE capabilities.
Innovation Solution
Introduce PDCCH monitoring capability at a span level, using span patterns (X, Y) to uniformly distribute PDCCH monitoring opportunities, allowing the UE to select the highest or reasonable capability based on resource configuration and supported combinations, thereby optimizing resource utilization without increasing complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If PDCCH monitoring capability is increased to reduce scheduling delays in URLLC scenarios, then the monitoring capability and scheduling efficiency are improved, but the complexity of the mobile terminal significantly increases
Solution Approach 1:
The patent segments the slot-level monitoring capability into span-level monitoring capabilities. Instead of uniformly increasing monitoring capability across the entire slot, the UE determines multiple span-level capabilities (first, second, and third PDCCH monitoring capabilities) for different span patterns. This segmentation allows the system to achieve higher overall monitoring capability while distributing the complexity across multiple smaller, manageable span-level units rather than requiring a single high-capability configuration.
2Loss of time
If PDCCH monitoring opportunities are increased to avoid scheduling delay, then the scheduling efficiency is improved, but the complexity of the mobile terminal significantly increases
Solution Approach 1:
The patent implements dynamic span pattern configuration where the network device can configure different span patterns (first, second, and third span patterns with different X and Y values) based on traffic requirements. The UE dynamically determines appropriate span-level monitoring capabilities matching the configured patterns. This dynamic adaptation allows the system to increase monitoring opportunities and reduce scheduling delays only when and where needed, rather than maintaining high complexity continuously.
3Productivity
If PDCCH resources are uniformly distributed using span patterns, then the resource utilization is optimized, but the device complexity increases
Solution Approach 1:
The patent applies local quality by allowing different span patterns and monitoring capabilities in different time-frequency regions. The UE determines specific span-level monitoring capabilities (first, second, third capabilities) for different span patterns rather than applying a single uniform capability across all resources. This enables optimized resource utilization in specific locations where monitoring is needed while maintaining lower complexity in other regions.
Data Source
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AI summary
The present disclosure discloses a control channel monitoring capability determining method and apparatus, a device, and a storage medium, applicable to a communication system. The method includes: receiving a resource configuration of a Physical Downlink Control Channel (PDCCH); and determining, based on the resource configuration of the PDCCH, a first target PDCCH monitoring capability corresponding to a first span combination and a second target PDCCH monitoring capability corresponding to a second span combination. The first span combination and the second span combination are applicable to a same time domain unit, and the first target PDCCH monitoring capability and the second target PDCCH monitoring capability are independent from each other. According to the present disclosure, a PDCCH monitoring capability of a User Equipment (UE) is brought into full play as much as possible without significantly increasing complexity of the UE.