一种基于主动避让的认知无线网络路由维护方案

在认知无线电网络中,主用户使用授权频段时认知用户需要避让。这将导致认知用户原路由上工作频率的频繁切换。为了尽量减少这种切换,维持原路由上数据持续高效地传输,提出了一种优化的认知无线网络路由维护方案。在认知无线网络中,当认知用户测得主用户存在时先测试主用户的运动速度、运动方向等信息,继而根据主用户实际的运动情况判断认知用户是否可以避让。仿真结果显示,认知用户通过有效的避让既避免了对主用户的干扰,又维持了认知网络原路由继续工作。

A novel design of route maintenance based on active avoiding in cognitive radio network

In cognitive radio network,while the spectrum is reused by the authority user,the cognitive user should quit the spectrum,which will lead to the frequency changed very often in cognitive route.In order to reduce the times of the change and keep the data transmitted continually and fluently in the original route,this paper proposes a novel design of routing protocol in cognitive radio network.It gives the cognitive user a new function.That is when the cognitive user sensed the authority user being existed,he could firstly test the authority user’s speed,direction etc,and then according the actual movement of the authority user,he could take some actions so that the disturbing between them could be avoided and the transmission of data in cognitive route would not be interrupted.