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随着IP组播技术的飞速发展,用户对多媒体视频流的需求的增加导致IP组播网络的性能下降。为解决IP组播性能测量中网络延迟问题,在高速校园网中,根据RFC标准文档中定义的组播性能测试指标和测试方法,实现精确测量组播网络的端到端时延,并且利用时钟同步原理对测量结果进行时钟频差分析。其创新之处在于将线性规划算法应用到对测量模型进行分析的过程中。通过在高速校园网中的测量结果表明,通过所提出算法对测量结果进行修正后可以得到准确的端到端网络时延。该研究为在校园网中推广组播流媒体应用打下基础,更有利于发现网络瓶颈,为未来网络构建奠定基础。
With the rapid development of IP multicast technology, the increase of users’ demand for multimedia video streams has led to the performance degradation of IP multicast networks. In order to solve the problem of network delay in IP multicast performance measurement, in the high-speed campus network, according to the multicast performance test index and test method defined in the RFC standard document, the end-to-end delay of the multicast network can be precisely measured. Synchronous principle of the measurement results of the clock frequency analysis. Its innovation lies in applying the linear programming algorithm to the analysis of the measurement model. The measurement results in the high-speed campus network show that the correct end-to-end network delay can be obtained after the measurement results are corrected by the proposed algorithm. This research lays the foundation for popularizing multicast streaming application in campus network, and is more conducive to discovering network bottlenecks and laying the foundation for future network construction.