基于分级网络编码的一种数据传输方法

摘要

In order to reduce the size of finite fields GF (2n) which was needed for the encoding calculation in intermediate node of network, a data transmission method based on hierarchical network coding was proposed in this paper. Focusing on the single-source multicast network with backbone-sub network structure, the authors decoded at the node that connected the backbone network and the sub-network. Then the decoded information was multicast to sub-network by network coding data transmission method. The theoretical analysis and the simulation results show that this method can reduce the size of finite fields GF(2n), and then reduce the computation delay of data transmission. Besides, it can make full use of the network capacity.%为了降低中间节点在编码计算时需要的有限域的阶,提出了分级网络编码数据传输方法.针对主干网-子网结构的单源组播网络,在连接子网的节点处进行解码,并以该节点为源点,把解码得出的信息采用网络编码数据传输方式组播至子网.理论分析与仿真测试结果表明:与单级网络编码方法相比,该方法可以降低有限域的阶,进而减少网络编码的运算延迟,并能充分地利用网络的带宽.