基于NAK压缩的可靠组播协议研究

随着组播应用范围的不断扩大,人们对组播的可靠性尤其在应用于不稳定的无线网络时有了更高的要求,提出了基于否定确认(NAK) 的可靠组播传输协议.文章在分析典型的组播网络系统模型的基础上,对基于NAK的可靠组播传输协议进行了改进;通过NS仿真结果证明,改进的协议有效压缩了NAK,减少了所需带宽,增强了系统的实时性和可扩展性,并提高了组播的可靠性.

Research on the NAK-compression-based reliable multicast protocol

With the expanding of the scope of the multicast application, people have a higher demand in the reliability of multicast applications, especially in the unstable wireless network, and a reliable multicast transport protocol based on the negative acknowledgement(NAK) has been put forth. The paper improves the NAK-based reliable multicast transport protocol based on the analysis of the typical multicast network model. The improved protocol compresses the NAK effectively, reduces the required bandwidth, enhances the real-time property and scalability of the systems, and improves the reliability of the multicast,which can be proved by the results of the NS simulation.