A cost model of embedded mobile real-time database management system

The great popularization of embedded facility and the fast development of mobile communication technology make the mobile real-time database of embedded facility management increase gradually. The influence of embedded mobile real-time database management system´s data characteristics by new application environment is analyzed in this article from three aspects of embedded ·, real-time and mobile to put forward cost model that applies to the query optimization of embedded mobile real-time database management system, according to many factors influencing the cost of embedded real-time database. The simulation experiment shows that the design program of optimizer could finish the query optimization of embedded mobile real-time database management system.