一种新的基于无线网络编码的单跳传输算法

Novel one-hop transmission algorithm in wireless network based on network coding

为了改善无线链路出错而降低传输效率问题,在无线中心传输结构下,基于网络编码理论,首先提出了理想的基于编码组的传输模型(ITCG),并根据无线信道易错的特性,又提出了基于重传的编码组传输模型(RTCG).基于上述传输模型,随后提出了新型的基于重传编码组模型的数据传输算法.最后通过仿真实验,分析了单播算法、基于重传的编码组传输算法的传输延迟和吞吐量变化.实验结果表明:基于重传的编码组传输算法能够提高传输效率,并且在节点突发出错情景下,能有效解决由于节点突发出错而造成的系统吞吐量急剧降问题,保证了数据传输的公平性.

To solve the problem of the efficient transmission in error-prone wireless network, an ideal transmission model based on coding group（ITCG） is proposed in this paper. Furthermore, a retransmission model based on coding group（RTCG） is introduced due to the error-prone channel in wireless network. Also, a novel transmission algorithm of retransmission model is proposed based on coding group （ARTCG）. At last, through the experiment, the transmission delay and throughput of the unicast and ARTCG are separately analyzed. Simulation results show that ARTCG can improve the transmission efficiency and solve the sharp decrement of performance with the condition of node＇s burst error. ARTCG can keep the transmission fairness of the different data.