UE Transmit Power Control via Spherical Coverage Definition
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Solution Overview
Problem
In current 5G NR systems, power classes for user equipment are not clearly defined across different frequency bands or dual connectivity, leading to difficulties in transmit power control during transmission.
Innovation Solution
User equipment is equipped with a controlling unit to determine its transmit power capability, including power class and spherical coverage, and communicates this information to a base station, which then provides power control instructions for proper transmit power management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If power classes are not clearly defined for different frequency bands and dual connectivity, then the system can support broader frequency ranges and connectivity options, but transmit power control becomes difficult and unreliable
Solution Approach 1:
The patent applies parameter changes by defining specific power class parameters (PC1, PC2, PC3, PC4) with distinct maximum transmit power values (23 dBm, 26 dBm, 36 dBm, 46 dBm) for different frequency bands and dual connectivity scenarios. This standardization of power parameters enables reliable transmit power control while maintaining adaptability across various NR frequency bands and connectivity configurations.
2Reliability
If beamforming with narrow beam width is applied to compensate propagation loss at high frequencies, then transmission reliability improves, but the system complexity increases
Solution Approach 1:
The patent applies local quality by configuring different power classes specifically for millimeter wave frequency bands where beamforming is required, versus sub-6 GHz bands where broader coverage is sufficient. This localized approach to power management allows the system to optimize transmission reliability through beamforming only where necessary, rather than applying complex beamforming across all frequency bands.
Data Source
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AI summary
User equipment includes a controlling unit that determines UE capability related to transmit power, the UE capability including information indicating a power class and spherical coverage, a notification unit that transmits the determined UE capability to a base station apparatus, a receiving unit that receives, from the base station apparatus, information on power control based on the transmitted UE capability, and a transmitting unit that transmits an uplink transmission signal, to which transmit power control based on the information on power control is applied, to the base station apparatus.