对无线电网络通信中用户信息节点定位,可保证无线电网络系统安全有效运行.对用户信息节点定位,需要计算出节点传输和接收数据消耗的能量,将节点定位多目标函数转变为单目标函数,完成信息节点的定位.传统方法通过寻找时延约束的通道相交汇聚点,连接全部节点的最短路径,但忽略了计算节点传输消耗能量,导致定位不准确.提出基于群搜索理论的OFDMA认知无线电网络通信用户信息节点定位方法.获取网络中的终端节点集合和通信接人点集合,给出通信用户信息节点定位目标函数,计算出每轮网络终端节点传输和接收数据消耗的能量,将通信用户信息节点定位多目标函数转变为单目标函数,利用群搜索优化理论对目标函数求解,以求解结果为依据完成对OFDMA认知无线电网络通信用户信息节点定位.仿真结果表明,所提方法能够提高网络通信接人点与终端节点间的可靠性,且网络时延较短.%This paper puts forward a method for node location of user information in communication of OFDMA cognitive radio network based on swarm search.We acquired set of terminal node and access point of communication;then provided objective function of node location to work out energy consumed by data transmission and reception of each round of network terminal node.We also converted multiple objective function into single objective function and used optimization theory of swarm search to solve the objective function.In the end,we completed node location of user information according to calculated results.Simulation results indicate that the method can improve reliability between access point and terminal node with short network delay.
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