为了解决认知无线电网络中频谱分配和路由选择相协调的问题,提出了树型拓扑的认知无线电路由协议.在分布式自组织网络中,非授权(次要)用户选择最优的空闲授权信道建立频谱树,同时在树的形成过程中,以多棵用户节点较少的频谱树代替一棵用户节点较多的频谱树,有效降低了每棵树的根节点负载.根据频谱树和基于最小时延的路由度量标准,建立了路由以完成次要用户间的通信.仿真结果表明,该协议能有效减少端到端的平均时延. In order to solve the problem of coordination between spectrum allocation and routing in cognitive radio networks, a cognitive radio routing protocol for tree topology is proposed. In distributed ad hoc networks, an unlicensed (secondary) user selects the optimal free-standing grant In the process of tree formation, a spectrum tree with fewer user nodes is substituted for a spectrum tree with more user nodes, which effectively reduces the root node load of each tree. The minimum delay routing metric, the establishment of the route to complete the communication between secondary users.The simulation results show that the protocol can effectively reduce the average end-to-end delay.