### Opportunistic Routing Mechanism Considering Link Correlation in Intra-Session Coding

CHEN Zhaohui, YANG Xiang, LI Peng, HE Heng

1. School of Computer Science and Technology, Wuhan University of Science and Technology, Wuhan 430065, China
• Online:2020-12-15 Published:2020-12-15

### 流内编码中考虑链路相关性的机会路由机制

1. 武汉科技大学 计算机科学与技术学院，武汉 430065

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.