多接口多信道无线网状网的信道动态切换研究

Research on Dynamic Channel Switching in Multi-interface Multi-channel Wireless Mesh Networks

首先介绍了目前常见的信道动态切换方法,并分别分析了他们的优缺点.然后针对他们的通信节点之间需要同步而难以实现或各个节点需要一个公共控制信道来解决数据信道的争用而影响网络吞吐率等缺点,提出了一种基于信道队列的信道动态切换方法.该方法不需同步机制和公共控制信道,每个接口通过信道队列的队头元素产生下次新的切换信道,较好的确保了各信道传输的公平性;QDSAC能使网络中各节点的信道切换序列独立生成,计算代价也小,较好的保证了信道切换序列生成的实时性,从而提高网络吞吐率.

The paper first describes current common dynamic switching methods of channels,and analyzes their advantages and disadvantages respectively.Then aims to their shortcomings that it is difficult for requiring synchronization between communication nodes to achieve or it has effect on networks throughput due to requiring a common control channel for every node to solve the contention problem of data channels,to propose a channel queues-based dynamic switching method of channels.The method needn＇t a synchronization mechanism and a common control channel for the proposed dynamic switching method,Each interface can generate the next new switching channel through the first element of channel queue,the better to ensure transmission fairness for each channel;channel switching sequences can generate independently using QDSAC,and the computational cost is also low,the better to ensure the real-time for the generation of channel switching sequences,thereby increases networks throughput.