Dual-SIM User Equipment Power Control for RF Exposure Limits
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Solution Overview
Problem
Existing wireless communication systems face challenges in managing power control for dual subscriber identity modules (SIMs) in user equipment (UEs) to comply with varying RF exposure limits and energy constraints, particularly in different frequency ranges, leading to potential overheating and interference.
Innovation Solution
A method and apparatus for UE to configure independent maximum transmit powers for each SIM based on initial power settings and energy limits, adjusting power levels to satisfy both SAR and MPE limits across different frequency bands, ensuring compliance with regulatory RF safety requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If independent maximum transmit powers are configured for each SIM based on initial power settings, then RF exposure compliance is improved, but device complexity increases
Solution Approach 1:
The patent divides the power control configuration into separate independent maximum transmit power settings for each SIM card. Each SIM receives its own initial maximum transmit power configuration specific to its frequency range, allowing individualized power management that ensures RF exposure compliance without requiring complex joint optimization across multiple SIMs.
2Reliability
If power levels are adjusted to satisfy SAR and MPE limits, then safety compliance is improved, but transmission power is reduced
Solution Approach 1:
The patent adjusts the initial maximum transmit power configuration parameters based on the specific frequency range of each SIM. By changing the power parameters according to frequency-specific SAR and MPE limits, the system achieves safety compliance while maximizing the allowable transmission power for each frequency band.
3Adaptability or versatility
If separate power configurations are used for different frequency ranges, then adaptability is improved, but configuration complexity increases
Solution Approach 1:
The patent applies local quality by providing customized initial maximum transmit power configurations tailored to each SIM's specific frequency range. Each frequency range receives appropriate power settings optimized for its characteristics, ensuring adaptability while keeping the configuration approach systematic and manageable through independent SIM-based settings.
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. A user equipment (UE) may configure a first initial set of maximum transmit powers for a first subscriber module. The UE may configure a second initial set of maximum transmit powers for a second subscriber module. The UE may configure a first maximum transmit power associated with a first connection for the first subscriber module. The UE may configure, independently of the configuration of the first maximum transmit power, a second maximum transmit power associated with the second connection. The UE may transmit based at least in part on at least one of the first maximum transmit power or the second maximum transmit power. Numerous other aspects are described.