SAHA: A Self-Adaptive Hardware-Software System Architecture for Ubiquitous Computing Applications

摘要

Ubiquitous computing enables services and devices to be dynamically adapted to changing conditions. System adaptivity becomes a key requirement in providing possibly better system performance. Most existing ubiquitous computing systems either only support software adaptation or limit the usage of reconfigurable hardware designs as conventional hardware devices. As a result, system adaptation and performance are quite restricted. To provide a more robust system adaptation, we propose a self-adaptive hardware-software system architecture (SAHA) that consists of service suppliers, hardware adapter, system manager, observer, and reconfigurable hardware architecture. SAHA supports both hardware preemption and hardware virtu-alization within a complete self-aware system adaptation mechanism such that the utilization of system resources is enhanced and better performance is provided for ubiquitous computing applications. Experiments with a ubiquitous computing service for information encryption demonstrate that SAHA can reduce the turnaround time by at least 22.04% of that required by using the conventional method.