中文摘要：

在认知无线电网络，由于非干扰性要求，次用户使用的频段会意外被主用户抢占．这种频段抢占可能频繁发生，它给可靠通信带来巨大的影响．提出一种面向可靠路由的备份路由协议，该协议将机会频谱、链路中断及节点失效考虑在内．仿真实验表明，所提出的新协议能有效地克服间歇连接、减小路由开销和提高数据传输的有效负载．

英文摘要：

In cognitive radio networks, due to the non-interfering requirement, a spectrum band used by secondary users may be unexpectedly preempted by primary users at any time. Such spectrum band preemptions are likely to occur frequently, which challenges reliable communications. In this paper, we propose a reliability oriented backup routing protocol, which takes into account opportunistic spectrum, link disruption, as well as node failure. Simulation results indicate that our proposed routing protocol can efficiently alleviate intermittent connectivity, reduce routing cost, and improve effective payload of data transmission.