Power Headroom Reporting for Simultaneous LTE and NR Transmissions
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Solution Overview
Problem
Traditional power headroom computation and reporting mechanisms in mobile devices do not effectively account for dynamic variations in maximum transmit power when supporting simultaneous multiple radio transmissions, leading to suboptimal power management and interference control.
Innovation Solution
A method and system for estimating the available maximum power variation of a second channel based on power usage in a first channel, computing power headroom measures, and generating reports when specific conditions are met, ensuring accurate power headroom reporting even during simultaneous multiple radio transmissions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional power headroom computation is used for single radio transmission, then the computation is simple and straightforward, but it becomes inaccurate when multiple radio transmissions occur simultaneously
Solution Approach 1:
The patent segments the power headroom reporting by introducing separate maximum power parameters for different radio access technologies (PCMAX_LTE and PCMAX_NR). This segmentation allows independent power management and accurate reporting for each radio type, resolving the inaccuracy issue while maintaining manageable complexity through structured parameter separation.
Solution Approach 2:
The patent implements dynamic power headroom computation by determining available maximum power variations based on current transmission conditions. The system dynamically adjusts power allocation between LTE and NR radios based on real-time requirements, enabling accurate power headroom reporting under varying multiple transmission scenarios without requiring overly complex static management.
2Reliability
If maximum transmit power is increased to support multiple simultaneous radio transmissions, then transmission quality improves, but battery consumption increases
Solution Approach 1:
The patent changes the power management parameters by introducing dynamic maximum power variations (ΔPCMAX) that adjust based on transmission conditions. This allows the system to optimize power allocation between LTE and NR radios, ensuring sufficient power for high-quality transmissions while minimizing overall battery consumption through adaptive parameter adjustment.
Solution Approach 2:
The patent implements feedback mechanisms through power headroom reporting, where the computed power headroom values are fed back to the network. This feedback enables the network to adjust scheduling and power allocation decisions, ensuring transmission quality is maintained while avoiding excessive power consumption by adapting to actual power availability.
3Productivity
If power is dynamically adjusted for each channel based on real-time conditions, then transmission efficiency improves, but the complexity of power management increases
Solution Approach 1:
The patent segments power management into distinct components for different radio access technologies, with separate maximum power parameters (PCMAX_LTE, PCMAX_NR) and independent power headroom computations. This segmentation enables efficient dynamic power adjustment for each radio type while maintaining manageable complexity through structured parameter separation and independent management.
Data Source
AI summary
Method and system for power headroom reporting in a mobile device capable of supporting multiple radio transmissions via different channels. The available maximum power variation of a second channel is estimated based on power usage in radio transmission of a first channel. A plurality of measures related to radio transmission via the second channel are them computed. Whether one or more conditions for power headroom reporting of the second channel are met is tested in accordance with a configuration with respect to power headroom reporting. The power headroom is computed based on the estimated power variation relating to the first channel and the radio transmission measures relating to the second channel. A power headroom report is then generated based on the computed power headroom and such a report is then transmitted, typically from the mobile device to a base station.