Power Headroom Reporting via Duty Cycle Thresholds
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently managing power headroom reporting, particularly in scenarios where the maximum output power of user equipment (UE) changes due to pathloss or power management, leading to potential latency and resource inefficiencies.
Innovation Solution
The implementation of an apparatus and method for determining modifications to the maximum output power at the UE, allowing for the transmission of a power headroom report (PHR) based on these changes, which can trigger adjustments in uplink/downlink configurations, thereby reducing latency and conserving resources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the UE transmits PHR frequently to report power changes, then the network can adjust configurations timely, but the processing resources and energy consumption increase
Solution Approach 1:
The patent changes the triggering parameter for PHR transmission from any power change to a threshold-based power change (delta PHR). The UE only triggers PHR transmission when the power headroom change exceeds a configured threshold, thereby reducing unnecessary reporting while maintaining adequate power management responsiveness.
Solution Approach 2:
Instead of reporting all power changes, the patent implements partial reporting by only transmitting PHR when changes exceed a threshold. This partial action approach reduces the frequency of PHR transmissions and associated processing energy while still capturing significant power variations that warrant network attention.
2Loss of energy
If the network adjusts uplink/downlink configuration frequently based on PHR, then power efficiency improves, but system complexity increases
Solution Approach 1:
The network pre-configures the PHR threshold and reporting parameters before the UE begins operation. This preliminary configuration establishes the criteria for PHR transmission, allowing the UE to autonomously decide when to report without real-time network intervention, thereby simplifying the overall system while maintaining power efficiency.
Solution Approach 2:
The UE autonomously monitors its own power headroom and determines when to trigger PHR transmission based on the configured threshold. This self-service mechanism eliminates the need for continuous network monitoring and control, reducing system complexity while achieving effective power management.
3Measurement precision
If the UE monitors power changes continuously, then power headroom accuracy is maintained, but processing resources are consumed
Solution Approach 1:
The system implements a feedback mechanism where the UE continuously monitors power headroom but only acts (triggers PHR transmission) when the change exceeds a threshold. This feedback-based approach maintains measurement precision by continuous monitoring while improving processing efficiency by limiting actual reporting actions to significant changes only.
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may determine a modification to a maximum output power associated with the UE. For example, the UE may determine to apply ΔPPowerClass to modify the maximum output power PCMAX,c. Accordingly, the UE may transmit a power headroom report (PHR) based on the modification to the maximum output power. For example, the UE may transmit the PHR based on an uplink/downlink configuration for a cell serving the UE. Alternatively, the UE may transmit the PHR based on an uplink duty cycle threshold, associated with the UE, being satisfied . Numerous other aspects are described.