Mode Selection and Mode-Dependency Modeling for Power-Aware Embedded Systems
Dexin Li, Pai H. Chou, Nader Bagherzadeh · 2002
Among the techniques for system-level power manage-ment, it is not currently possible to guarantee timing con-straints and have a comprehensive system model support-ing multiple components at the same time. We propose a newmethod for modeling and selecting the power modes for the optimal system-power management of embedded sys-tems under timing and power constraints. First, we not only model the modes and the transitions overhead at the com-ponent level, but we also capture the application-imposed relationships among the components by introducing amode dependencygraph at the system level. Second, we propose a mode selection technique, which determines when and how to change mode in these components such that the whole system can meet all power and timing constraints. Our constraint-driven approach is a critical feature for explor-ing power/performance tradeoffs in power-awareembedded systems. We demonstrate the application of our techniques to a low-power sensor and an autonomous rover example. 1