PDCCH Monitoring Span Configuration for UE Power Reduction
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Solution Overview
Problem
In the context of 5G NR, the increased PDCCH monitoring capability in Release 16 leads to higher UE complexity and power consumption, necessitating a design that mitigates these issues while maintaining or improving latency and blocking performance.
Innovation Solution
A method where a UE reports its per-span based capability to a network node, allowing PDCCH monitoring with a configuration that satisfies gap separation requirements across slots, including cross-slot boundaries, to optimize the distribution of CCEs and BDs, thereby reducing complexity and power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If PDCCH monitoring capability is increased in Release 16, then latency and blocking performance are improved, but UE complexity and power consumption increase
Solution Approach 1:
The patent segments the PDCCH monitoring capability into per-span based configurations rather than uniform per-slot budgets. By dividing the monitoring span into multiple segments with gap separation requirements, the system can achieve increased overall monitoring capability while distributing the complexity across manageable segments, thus improving latency without proportionally increasing UE complexity
Solution Approach 2:
The patent introduces dynamic configurations for PDCCH monitoring spans with flexible gap separation parameters. The UE can report multiple candidate values for monitoring span configurations, allowing the system to dynamically select optimal configurations based on current conditions, thereby improving latency performance while adapting UE complexity to actual needs rather than requiring maximum capability always
2Loss of time
If PDCCH monitoring capability is increased in Release 16, then latency and blocking performance are improved, but power consumption increases
Solution Approach 1:
By segmenting PDCCH monitoring into per-span configurations with gap separations, the UE can manage power consumption in discrete intervals rather than continuous high-power monitoring. The gap separation requirements create natural pause periods between monitoring spans, reducing overall power consumption while maintaining improved latency through increased monitoring opportunities within each span
Solution Approach 2:
The patent changes the monitoring parameters from fixed per-slot budgets to flexible per-span configurations with variable gap separations. The UE reports candidate values for monitoring span parameters, allowing optimization of the balance between latency reduction and power consumption based on actual channel conditions and traffic requirements
3Adaptability or versatility
If per-span based capability reporting is implemented, then PDCCH monitoring configuration can satisfy gap separation requirements across slots, but UE reporting complexity increases
Solution Approach 1:
The patent creates a universal reporting framework where the UE reports per-span based capability information that can be applied across multiple slots and configurations. The reported candidate values serve multiple purposes: defining monitoring span configurations, establishing gap separation requirements, and enabling cross-slot boundary handling, thus achieving high configuration flexibility without proportionally increasing reporting complexity
Data Source
AI summary
An apparatus, implemented in a user equipment (UE), transmits a report of a per-span based capability of the UE to a network node of a wireless network. The apparatus also performs physical downlink control channel (PDCCH) monitoring using a configuration that satisfies a requirement for a gap separation with respect to spans for at least one candidate value set in the report in every slot including cross-slot boundaries.