Preemptive Battery Voltage Management in Multi-SIM Devices
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Solution Overview
Problem
Dual Standby Dual Active (DSDA) mobile devices experience significant battery output voltage drops due to high current spikes during simultaneous active calls and data transmissions, leading to power management challenges that require preemptive solutions without overwhelming software or re-architecting UE components.
Innovation Solution
A power management system that adjusts power levels and operating frequencies of UE components based on concurrency detection, reducing transmit power and audio gain when concurrent calls are detected, and considering junction temperature thresholds to mitigate battery voltage drops.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If DSDA devices support concurrent active calls and data transmissions, then communication functionality and versatility are improved, but battery output voltage drops due to high current spikes
Solution Approach 1:
The power management system performs preliminary detection of concurrency conditions and proactively adjusts power levels before voltage drops occur. The system monitors for concurrent call conditions and preemptively reduces transmit power or audio gain to prevent battery voltage instability, rather than reacting after the problem manifests.
2Reliability
If transmit power and audio gain are reduced during concurrency, then battery voltage stability is improved, but communication quality and signal strength deteriorate
Solution Approach 1:
The system applies partial power reduction only to specific components (transmit power or audio gain) rather than reducing all power equally. This selective adjustment provides just enough power mitigation to stabilize battery voltage while maintaining minimum acceptable signal quality for communication functionality.
3Reliability
If junction temperature is considered for power management, then thermal safety and device reliability are improved, but software complexity increases
Solution Approach 1:
The power management system performs multiple functions using a unified approach: it simultaneously manages battery voltage stability, thermal safety, and power distribution through a single concurrency detection and power adjustment mechanism. This multi-functional design consolidates what could be separate complex systems into one integrated solution.
Data Source
AI summary
Apparatus and methods for power control management in a user equipment (UE) include establishing a first call and a second call at the UE, wherein the first call is associated with a first subscription and the second call is associated with a second subscription. Further, the apparatus and methods include determining concurrency of the first call and the second call. The apparatus and methods also includes adjusting a power level or operating frequency associated with at least one UE component based on determining the concurrency of the first call and the second call.