基于网络编码的无线单跳传输框架的研究与实现

为了解决无线链路易出错从而降低传输效率以及由于重传导致数据流间传输不公平,基于网络编码的思想,在无线单跳传输结构下,提出了基于编码组的传输模型,并根据中心站点的传输数据不同,分为内部数据传输模型和外部数据传输模型.基于上述传输模型,提出了一种基于编码组的数据传输框架.最后通过仿真实验,分析了ARQ单播策略、FEC单播策略和编码组传输框架的传输延迟,同时还对它们的传输吞吐量进行分析比较,并且在节点突发出错情景下分析ARQ单播策略、FEC单播策略和基于重传的编码组传输框架的吞叶量变化.实验表明:FTCG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下降问题,保证了数据传输的公平性.

Research and implementation of one-hop transmission framework in wireless network based on network coding

To solve the problem of the efficient transmission in error-prone wireless network and unfairness attribute to retransmission. Inspired by the network coding,a transmission model based on coding group (TCG) was proposed. Because of the different type of packets of central station,this model also could be divided into internal transmission model (LTCG) and external transmission model (ETCG). Furthermore,a transmission framework based on coding group (FTCG) was introduced as to the above model. At last,throug...