认知无线网络按需协同感知和信道分配

On-demand cooperative spectrum sensing and channel allocation in cognitive wireless networks

结合路由发现和维护过程中控制消息的广播特性,提出将频谱协同感知和信道分配的交互信息部分融入路由控制消息的方法。认知用户的信息交互随按需路由发现过程而启动,并在路由沿线建立协同感知节点簇,利用路由维护消息对该节点簇进行维护。同时以认知网络容量最大化为目标,提出将频谱协同感知和信道分配联合设计。仿真分析表明,减少了认知用户的信息交互开销,缓解了认知无线网络中控制信道的瓶颈影响,对空闲频谱进行了高效再利用。

Combining of the broadcast feature of control messages in the route discovery and maintenance process,a method to make the mutual information of the spectrum sensing and channel allocation into the route control messages was proposed.The information exchange of cognitive users is started by the route discovery process,and then creates the node cluster for cooperative sensing along the route path,which is maintained by the route maintenance messages.In or-der to maximize the network capacity of cognitive users,proposed jointly design of the spectrum sensing and the channel allocation.Simulation analysis showed that the overhead of information exchange for cognitive users reduce,and ease the bottleneck effects of the control channel in cognitive wireless networks,meanwhile efficiently re-use the idle spectrum.