Power Amplifier Reliability in Multi-SIM Antenna Switching
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Solution Overview
Problem
In multi-SIM wireless communication systems, concurrent antenna switching operations between active and idle SIMs can lead to power amplifier reliability issues due to overlapping transmit and receive activities sharing the same antenna switch.
Innovation Solution
A method and apparatus for managing power amplifier reliability by detecting overlapping communications between SIMs operating in connected and idle modes, and performing preventive actions such as limiting output power, suspending transmission, or denying concurrent activities to prevent damage to the power amplifier.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If concurrent antenna switching operations are performed between active and idle SIMs, then communication functionality for multiple SIMs is improved, but power amplifier reliability deteriorates due to overlapping transmit and receive activities
Solution Approach 1:
The system performs preliminary detection of overlapping communications between active and idle SIMs before they can cause damage. By detecting the time domain overlap and antenna switch sharing condition in advance, the system proactively identifies at-risk scenarios and applies preventive actions to protect the power amplifier before damage occurs.
Solution Approach 2:
The system introduces an intermediary control mechanism that monitors and manages the antenna switch sharing between transmit and receive chains. This intermediary detection system acts as a mediator that identifies when concurrent operations would cause harmful interactions and triggers appropriate preventive measures.
2Reliability
If output power is limited to prevent power amplifier damage, then power amplifier reliability is improved, but transmission performance deteriorates
Solution Approach 1:
The system applies partial power limitation only when necessary - specifically when overlapping communications are detected and antenna switch sharing is identified. The output power is limited to a maximum value that satisfies ruggedness parameters only during these specific concurrent operations, while allowing full power transmission during normal operations without overlap, thus minimizing the impact on overall transmission performance.
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may detect a first communication, associated with a first subscriber identity module (SIM) operating in a connected mode, that is at least partially overlapping in a time domain with a second communication associated with a second SIM operating in an idle mode. The UE may detect that a transmit chain associated with the first SIM and a receive chain associated with the second SIM are sharing an antenna switch. The UE may perform a preventive action based at least in part on the first communication associated with the first SIM overlapping in the time domain with the second communication associated with the second SIM while the transmit chain associated with the first SIM and the receive chain associated with the second SIM are sharing the antenna switch. Numerous other aspects are described.