An Improved Adaptive Task Scheduling for Multimedia Applications
Hong Qian Xue · 2007
Much research has been done on guarantee the QoS of multimedia systems, and several real-time task models have been studied. But the Worst Case Execution Time (WCET), which is hard to be provided for multimedia tasks, is needed in these models to make admission controlling possible. Thus, how to effectively schedule multimedia tasks with admission controlling and self-adaptive QoS controlling and more fully resource utilization if WCET is unknown. First, an improved task model, called Adaptive Rate-Based task model (ARB) with WCET unknown, is presented. Then through theoretical analysis and simulation experiment, it is demonstrated to be feasible and effective to schedule multimedia tasks with admission controlling and self-adaptive QoS controlling based on ARB task model.