网络编码允许通信节点对接收到的消息进行编码处理，能够在一定程度上提高网络吞吐量，增强通信安全性。机会网络基于移动节点，面向动态拓扑结构组织、实现通信的特点，使其成为现代网络通信的发展趋势。但是机会网络投递率与消息副本数间的矛盾，严重制约着机会网络通信技术的推进。将网络编码技术应用到机会网络路由设计中，可以降低机会网络通信的消息副本数，提高投递率。详细描述了随机线性编码等几种网络编码在机会网络路由设计中的典型应用，并提出了网络编码在机会网络中的发展展望。%Network coding allows the communication nodes to encode the received messages, which can improve the network throughput and enhance the communication security. The opportunistic network is based on the mobile node, and organization and implementation of communication based on dynamic topology, which make it the development trend of the modern network communication. However, the contradiction between the delivery rate and the number of message copies seriously restricts the advance of the opportunistic network communication technology. The application of network coding technology in the routing design of opportunistic network can reduce the number of message copies and improve the delivery rate. This paper describes the typical application of network coding, such as random linear coding and so on, in the routing design of opportunistic network, and puts forward the development prospect of network coding in the opportunistic network.
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