Abstract: Provided are a small low power embedded system and a preemption avoidance method thereof. A method for avoiding preemption in a small low power embedded system includes fetching and running a periodic atomic task from a periodic run queue, reducing any one of periodic atomic tasks or performing the change of a task after changing a field of the run periodic atomic task into a run standby state, according to a result value of the run of the periodic atomic task, fetching a sporadic atomic task from a sporadic run queue, and acquiring a system clock, running the fetched sporadic atomic task according to run time in the worst condition, and reducing any one of sporadic atomic tasks or performing the change of an event after a field of the run sporadic atomic task into a run standby state, according to a result value of the run of the sporadic atomic task.

Abstract: The present invention relates to a hardwired scheduler for low power wireless device processor and a method for using the same wherein, for a processor used in a sensor node, ubiquitous small node and a wireless communication device which require a low power consumption, a storage of the currently running process and the process to be executed in priority in a list of subsequent processes to be carried out are automatically transmitted to the processor core, and the number of oscillations of the clock generator which operates the processor core is adjusted to be suitable for each process to reduce the power consumed by the processor to be applicable to devices operating on a network which require a low power consumption and small delay time.

Abstract: The present invention relates to a system for providing a multimedia service to a portable device. The multimedia service system of the present invention includes a multimedia source, a hardware transcoder, an interface unit, a storage unit and a portable device. The multimedia source provides multimedia contents including video and/or audio data. The hardware transcoder converts the multimedia contents into contents having a format suitable for a display device of the portable device. The interface unit transmits the contents converted by the transcoder. The storage unit stores therein the contents received through the interface unit. The portable device receives the contents from the storage unit and displays the contents. The transcoder changes at least one of video and/or audio formats, a bandwidth (data rate), a frame rate and a resolution of the contents provided from the multimedia source.