Multi-SIM UE Temperature Mitigation via RAT Redirection
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Solution Overview
Problem
Wireless communication systems face service limitations due to temperature rises in Dual-SIM Dual-Active mode, leading to frequent service interruptions and prolonged downtime as devices move between radio access technologies (RATs) in response to temperature thresholds.
Innovation Solution
A user equipment (UE) detects temperature thresholds and proactively moves one subscriber from a higher data rate RAT (like NR) to a lower data rate RAT (like LTE) to mitigate temperature increases, reducing the likelihood of service limitations and sustaining critical services like voice communications by internal redirection mechanisms.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the UE operates both subscribers on the first RAT (higher data rate) to maintain service quality, then the data transmission rate and service quality are improved, but the temperature of the UE increases leading to service limitations
Solution Approach 1:
The patent dynamically adjusts the RAT configuration based on temperature conditions. When temperature exceeds the threshold, the system automatically moves the second subscriber from the first RAT (higher data rate) to the second RAT (lower data rate), thereby reducing power consumption and temperature while maintaining service continuity. This dynamic adaptation resolves the contradiction between maintaining high data transmission rates and preventing excessive temperature rise.
2Temperature
If the UE limits service in the first RAT due to temperature rise, then the temperature is reduced, but the service availability and connectivity are degraded
Solution Approach 1:
The patent segments the service across multiple RATs. When temperature exceeds the threshold, instead of limiting service on the first RAT entirely, the system moves the second subscriber to the second RAT, thereby segmenting the service load across different radio access technologies. This maintains service availability while managing temperature, as critical services continue on the first RAT and non-critical services are handled on the second RAT.
3Temperature
If the UE frequently moves subscribers between RATs in response to temperature thresholds, then the temperature is managed, but the service interruptions and downtime increase
Solution Approach 1:
The patent uses preliminary action by setting and monitoring temperature thresholds before critical temperature rise occurs. The system proactively moves the second subscriber to the second RAT when the temperature approaches the threshold, preventing excessive temperature rise and the need for frequent service interruptions. This anticipatory approach minimizes service disruption by smoothly transitioning between RATs before temperature-critical conditions are reached.
Data Source
AI summary
Aspects of the present disclosure relate to wireless communications, and more particularly, to techniques that may help mitigate service loss for a UE (e.g., in DSDA mode) due to temperature rise. According to certain aspects, a UE detects, while operating in a multi subscriber identity module (SIM) mode with at least a first subscriber (SUB) and a second subscriber (SUB) active on a first radio access technology (RAT), that the UE has reached a first temperature threshold less than a second temperature threshold at which the UE limits service in the first RAT and greater than a third temperature threshold associated with a temperature mitigation level. The UE then takes action to move the first SUB to a second RAT in response to the detecting.