在流式媒体应用中 ,流调度算法通过降低系统延迟等策略显著提高了系统服务能力。在Patching和 Period Patch算法的基础上 ,引入若干提高系统性能的策略 ,提出一种选择性 Period-Patch流调度算法。为评价选择性 Period Patch算法的性能 ,通过仿真实验 ,比较选择性 Period-Patch算法与 Patching和 Period Patch算法的性能 In streaming media applications, the flow scheduling algorithm significantly improves system service capabilities by reducing system latency and other tactics. Based on the Patching and Period Patch algorithms, several strategies for improving system performance are introduced, and a selective Period-Patch scheduling algorithm is proposed. To evaluate the performance of selective Period Patch algorithm, the performance of selective Period-Patch algorithm and Patching and Period Patch algorithm is compared by simulation experiment