【摘要】 针对蜂窝中继系统中单一应用网络编码技术无法提升系统性能的问题,提出基于概率与网络编码的蜂窝中继选择机制CRS-PNC。在该机制中,数据的交互基于ARQ模式进行,中继节点对侦听到的待中继的数据报文会结合编码机会和本身的负载情况来计算转发概率,并构造概率转发函数来设计自适应的发送时延,以实现数据报文网络编码后的竞争时延发送。仿真表明,CRS-PNC与经典的几种蜂窝中继机制相比,在系统吞吐量上具有较好的性能。更多还原

【Abstract】 In cellar relay system, system performance will not be improved just through network coding. To solve this problem, proposes a cellular relay selection based on probability and network coding(CRS-PNC). The mechanism uses ARQ for transferring data reliably. After relay node catches the data that will be relayed, it will both consider the data load of relay nodes and the coding chance of data to calculate the forward probability of each relay. A function of forward probability is constructed combined with an adaptive back-off mechanism, by which the data is relayed. The simulation results show that the performance of CRS-PNC is superior to several traditional mechanisms in terms of system throughput.更多还原