论文部分内容阅读
多跳无线网络中数据包在不同链路的接收存在相关性,现有的基于网络编码的机会转发协议大多基于链路间相互独立的假设,严重降低其在实际网络中的性能表现.该文针对链路相关无线网络环境,提出基于网络编码的无线链路相关性感知的机会转发机制LCOF.首先结合链路相关性对基于网络编码的期望传输次数进行计算.在此基础上,提出数据包综合效用增益函数,以此确定数据包的转发优先级.随后提出多优先级数据包调度策略,确保高优先级数据包以更大的概率被转发.仿真结果表明,LCOF可以更好地利用编码机会,有效提高网络吞吐量.
There is a correlation between the data packets received on different links in a multi-hop wireless network. The existing network-based opportunistic forwarding protocols are mostly based on the assumption that the links are independent of each other, seriously degrading their performance in real networks. Aiming at the link-related wireless network environment, an opportunistic forwarding mechanism LCOF based on network coding is proposed, which is based on the correlation of links, to calculate the expected number of transmissions based on network coding. On this basis, The utility function is integrated to determine the forwarding priority of the data packet.And then a multi-priority data packet scheduling strategy is proposed to ensure that the data packets with higher priority are forwarded with greater probability.The simulation results show that LCOF can make better use of coding Opportunity to effectively improve network throughput.