WiMAX网络中基于优先级的视频分组调度算法

Priority-based Packet Scheduling Algorithm for Video Streaming Over WiMAX Networks

无线视频传输是网络传输的研究热点,在WiMAX网络中,实时轮询业务(rtPS)的典型应用是实时视频传输,当前使用较多的是先进先出(FIFO)和最早到达期限数据优先(EDF)队列调度算法,其中EDF算法多用于多业务之间的资源分配,而非单个业务流队列的出对调度。在视频优先级以及WiMAX网络为单个视频流分配带宽限定的条件下进行调度算法的研究,以期待在带宽有限的情况下得到更高的视频服务质量。

The study of wireless video transnfission is a hotspot in network transmission.In WIMAX networks,the real-time video transfer is a typical service in application of video streaming（rtPS）.The First In First Out（FIFO） and Earliest Deadline First（EDF） scheduler algorithms are popular application.And EI）F is often used in the source allocation among several service flows ,but not scheduler in single service.A priority-based packet scheduling scheme for video streaming over WIMAX networks isstudied,which corporate with a resource allocation.The simulation results show that the proposed algorithm can improve the video quality better.