Abstract
Over the last decades, the advancements in networking technology and new multimedia devices have motivated the research on efficient video streaming mechanisms under wireless. We consider combing soft real-time video streaming scheduling with threshold to minimize the ineffective preemption. Based on the value density and urgency of soft real-time task, the dynamic scheduling with preemption threshold strategy (DSPT) is proposed in the paper. By analyzing the response time and preemption relationship of tasks, the preemption thresholds are assigned. Simulation results show that the DSPT strategy achieves improvements about success rate, delay time, and benefit of the system.
Highlights
With the advancements in networking technology and new multimedia devices, video streaming mechanisms under various network and devices have attracted more and more attention
We propose the task scheduling strategy dynamic scheduling with preemption threshold strategy (DSPT) based on preemption threshold, which can obtain better performance
We propose a limited preemption scheduling strategy DSPT based on preemption threshold, which reduces the blocking time of the tasks by restricting preemption
Summary
With the advancements in networking technology and new multimedia devices, video streaming mechanisms under various network and devices have attracted more and more attention. Video streaming scheduling in wireless networks has been developed for recent years, such as given quality on service mechanisms [12,13,14,15,16] and real-time adaptive [17,18,19]. For some actual video streaming media application, the packets of the transmission with delay can still bring a certain service and these packets can be forwarded and represented by soft real-time tasks. The soft real-time task model with value function is applicable to video streaming with delay [23, 24]. Soft real-time task model is conducted for the video streaming under wireless. We propose a soft real-time threshold preemption scheduling strategy by combining value density and urgency for video streaming in the paper.
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