关键词: 流内网络编码, 链路相关性, 传输计算, 转发节点选取

Abstract:

Existing opportunistic routing protocols that joint network coding assume that wireless link transmissions are independent, but related studies have shown that wireless link transmissions are correlated. Link correlation affects the number of times the forwarder transmit the encoded packet and the selection of the forwarders, which in turn affects the performance of the protocol. In this paper, an opportunistic routing mechanism considering link correlation in intra-session network coding is proposed. In the mechanism, a node periodically collects feedback information of neighbor nodes to measure link correlation, and thus accurately calculates the expected number of forwarding times and selects the forwarder set with fewer transmissions. Simulation experiments have shown that this mechanism can significantly reduce the transmission redundancy in the network and improve the overall throughput of the network.

Key words: intra-flow network coding, link correlation, transmission calculating, forwarder selection