网络编码在高质量应用层组播中的应用

在面向节点群的混合网状应用层组播模型(Hybrid Mesh Application Multicast Model,HM-ALM)中设计并实现了确定性线性网络编码,探讨了网络编码对提高组播性能的作用.实验表明,网络编码能减少传输延迟和增强系统健壮性.使用网络编码后系统传输延迟减少了约50%;在系统动态变化时,正确接收数据的节点数可以达到最大值,系统能更快恢复稳定.

Application of Network Coding in High Quality ALM

In this paper, we design and implement the deterministic linear network coding in HM-ALM (Hybrid Mesh Application Multicast Model), a hybrid mesh ALM model. Through experiments we discuss the effects of network coding on the improvement of performance of ALM. The experiments prove that network coding can improve multicast system performance, especially in reducing the transmission delay and strengthening the system robustness. The experimental results show that the transmission delay is decreased by about 50% with our network coding. When the multicast system changes dynamically, all the receiving nodes can get the complete data correctly, and the system can quickly restore to its stable statewith smaller fluctuation of multicast performance.