面向MPEG-4流的交换机调度算法

发布时间：2018-06-14 09:50

本文选题：交换机调度算法 + 虚拟输出队列　；参考：《实验室研究与探索》2013年07期

【摘要】：为解决MPEG-4流传输过程中传统的交换机调度算法导致的普通数据队列包丢失及增强层有较大的延时和延时抖动问题,采用了改进算法,首先,将到达每个输出端口的数据按照优先级分成3组;其次,根据每组的特性采用动态优先级算法实现,设计了一个动态的线性优先级计算函数,该函数的输入参数是每个队列的优先级和在每一队列中的待发送的数据包数,传输的优先级随之动态改变。实验证明,提出的算法能够保证MPEG-4基本层的传输,根据网络带宽状况允许更多的MPEG-4增强子层通过,比传统的交换机调度算法提高了MPEG-4流传输的服务质量,更好地支持了流传输。
[Abstract]:In order to solve the problem of packet loss and delay jitter in the enhancement layer caused by the traditional switch scheduling algorithm in MPEG-4 stream transmission, an improved algorithm is adopted. The data arriving at each output port is divided into three groups according to the priority. Secondly, according to the characteristics of each group, the dynamic priority algorithm is used to design a dynamic linear priority calculation function. The input parameter of this function is the priority of each queue and the number of packets to be sent in each queue, and the priority of transmission changes dynamically. Experiments show that the proposed algorithm can guarantee the transmission of MPEG-4 basic layer and allow more MPEG-4 enhancement sublayers to pass according to the network bandwidth. Compared with the traditional switch scheduling algorithm, the proposed algorithm improves the QoS of MPEG-4 stream transmission and supports the streaming transmission better.
【作者单位】：金陵科技学院信息技术学院;江苏省信息分析工程实验室;南京理工大学计算机科学与技术学院;
【基金】：江苏省教育厅高校自然科学研究项目(11KJD510002)
【分类号】：TP393.05

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