一种无线传感器网络动态多信道MAC协议

发布时间：2019-02-21 20:55

【摘要】：为了解决无线传感器网络内部节点干扰和外部Wi Fi网络干扰引起的服务质量下降问题,提出了一种动态多信道MAC协议DM-MAC.首先,通过3次握手机制和分布式计算方法为网络内节点分配初始信道.其次,构造拉丁跳频矩阵,节点根据初始信道号在矩阵中选取对应的跳频序列.在此基础上,利用状态转移图调整每个信道在跳频序列中的位置.当可用信道数量发生变化时,根据信道状态转移图生成新的拉丁跳频序列.最后,利用网络仿真软件NS2对DM-MAC通信性能进行分析.实验结果表明,与Mu CHMAC协议相比,DM-MAC能够有效地降低突发流量传输时内部节点间的干扰,以及外部Wi Fi干扰源对无线传感器网络性能的影响.同时,该协议改善了平均端到端延时和数据延时上限性能指标,提升了网络服务质量.
[Abstract]:In order to solve the problem of QoS degradation caused by internal node interference and external Wi Fi interference in wireless sensor networks, a dynamic multi-channel MAC protocol DM-MAC. is proposed. First, the initial channel is assigned to the nodes in the network by the three handshake mechanism and the distributed computing method. Secondly, the Latin frequency hopping matrix is constructed, and the node selects the corresponding frequency hopping sequence in the matrix according to the initial channel number. On this basis, the position of each channel in frequency hopping sequence is adjusted by state transition graph. When the number of available channels changes, a new Latin frequency hopping sequence is generated according to the channel state transition graph. Finally, the network simulation software NS2 is used to analyze the communication performance of DM-MAC. Experimental results show that compared with Mu CHMAC protocol, DM-MAC can effectively reduce the interference between internal nodes during burst traffic transmission and the influence of external Wi Fi interference sources on the performance of wireless sensor networks. At the same time, the protocol improves the average end-to-end delay and data delay upper bound performance index, and improves the network quality of service.
【作者单位】：东南大学国家专用集成电路系统工程技术研究中心;东南大学射频与光电集成电路研究所;
【基金】：国家自然科学基金资助项目(61176031) 江苏省普通高校研究生科研创新计划资助项目(KYLX_0130)
【分类号】：TN929.5;TP212.9

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