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在多信道无线Mesh网络中,当发送节点和接收节点之间有多条可用信道时,动态信道分配协议DCA(Dynamic Channel Assignment)采用的是随机选择接入信道,这样一方面容易导致有不同性能的信道分配不合理,另一方面容易造成信道冲突的频繁发生,导致数据包时延较大。针对这些问题,文中提出一种基于信息素模型的多信道MAC协议——CAPC(Channels Assignment based on Pheromone Concentration)协议,仿真结果显示该协议在系统吞吐量和数据包投递成功率等方面明显优于DCA协议。
In multi-channel wireless mesh networks, when there are multiple available channels between the sending node and the receiving node, the dynamic channel assignment protocol (DCA) uses a randomly selected access channel, which easily leads to different performance Channel allocation unreasonable, on the other hand easily lead to frequent occurrence of channel conflicts, resulting in larger packet delay. In view of these problems, this paper proposes a pheromone-based multi-channel MAC protocol, CAPA (Channel Assignment based on Pheromone Concentration) protocol. The simulation results show that the protocol is superior to system throughput and packet delivery success rate DCA protocol.