Wireless Control Channel Constraints for Reduced-Capability UEs
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Solution Overview
Problem
Existing wireless communication technologies face challenges in managing power consumption and processing complexity due to excessive monitoring of control channel candidates, particularly for UEs with reduced or limited capabilities.
Innovation Solution
Implementing a control channel monitoring constraint based on a first condition to limit the number of PDCCH candidates and non-overlapped CCEs within a resource unit, tailored for UEs with reduced capabilities, using scaling factors to relax monitoring requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the number of control channel candidates to be monitored is reduced, then power consumption and processing complexity are reduced, but communication reliability may deteriorate
Solution Approach 1:
The patent applies parameter changes by introducing a scaling factor that dynamically adjusts the monitoring constraint parameters (maximum number of PDCCH candidates and non-overlapped CCEs) based on UE capability indicators. This allows the system to adapt the monitoring burden to match the UE's processing capabilities, reducing power consumption for reduced-capability UEs while maintaining adequate communication reliability through capability-aware parameter optimization.
2Device complexity
If the maximum number of PDCCH candidates and non-overlapped CCEs is limited, then device complexity is reduced, but control channel monitoring effectiveness deteriorates
Solution Approach 1:
The patent implements dynamics by making the monitoring constraints adaptive rather than static. The network node determines scaling factors based on UE capability indicators and dynamically adjusts the maximum number of PDCCH candidates and non-overlapped CCEs accordingly. This dynamic adjustment ensures that reduced-capability UEs experience lower processing complexity while maintaining monitoring effectiveness appropriate to their capabilities.
Solution Approach 2:
The patent applies local quality by differentiating monitoring requirements based on UE capability categories. Different scaling factors are applied to different UE types (full capability vs. reduced capability), creating localized optimization for each UE category. This allows the system to tailor the monitoring constraint parameters to the specific capabilities of each UE, improving overall system efficiency.
3Use of energy by moving object
If control channel monitoring constraints are applied, then power consumption is reduced, but spectral efficiency may deteriorate
Solution Approach 1:
The patent resolves this contradiction through parameter changes by introducing capability-based scaling factors that optimize the balance between power consumption and spectral efficiency. By adjusting the maximum number of PDCCH candidates and non-overlapped CCEs according to UE capabilities, the system reduces power consumption for reduced-capability UEs while maintaining spectral efficiency through appropriate parameter selection that matches UE processing capabilities.
Data Source
AI summary
Disclosed in this patent document are, among other things, techniques, and apparatuses for improving the efficiency of wireless communication. In one aspect, a method of wireless communication is disclosed. The method includes determining, by a wireless node, a control channel monitoring constraint based on a first condition. The method further includes monitoring, by the wireless device, one or more control channel candidates at a control channel monitoring occasion, wherein a maximum number of the control channel candidates within a resource unit or a maximum number of non-overlapped control channel elements within a resource unit satisfies the control channel monitoring constraint.