Balance the battery life and real-time issues for portable real-time embedded system by applying DVS with battery model

Power consumption and real-time have been two of the major constraints in the mobile computing system design. Much work has been done to study the relationship between power, performance and real time issues. Many of existing studies assumed that the energy of the battery is a constant parameter. In fact, the energy of the battery is affected by the load current. This paper presents a battery model driven power aware real-time software system design. In this paper we take the characteristics of battery into account. And our work is applying DVS to hard real time embedded system with battery model. This new approach is more accurate to reflect the tradeoff between battery life and real-time performance.