Design of adaptive threshold control algorithm based on real-time CPU operation patterns for mobile devices

摘要

Thermal problems in conventional mobile devices are primarily managed by using software-based techniques due to compact sizes and limited power budgets. Since these software-based techniques incur inevitable performance degradation to reduce temperature, efficient thermal management techniques are essential for modern mobile devices. In this letter, the authors propose a novel control algorithm, which adaptively controls the threshold based on the power efficiency of mobile CPUs in real-time. The authors validate the thermal mitigation capability and system performance of their proposed scheme using a commercial smartphone. The evaluation results indicate that the proposed scheme reduces the CPU and PCB temperature by 1.20 and 1.38%, respectively, and simultaneously improves overall system performance by 5.44%.