ABSTRACT
Technological advances have progressively removed the spatial limitations of the computing environment, giving rise to a new paradigm called mobile computing [1]. We can now connect to the Internet while we are on the move, using pocket-sized, battery-powered embedded devices, such as PDAs (personal digital assistants) and cellular phones, which communicate over a wireless channel. The applications of computing devices have also been changing in response to ever-improving hardware and software technologies. Today, we routinely utilize multimedia-based services instead of text-based ones, even hand-held devices. We are now moving into a new era of computing.
