In order to improve the survival period of wireless sensor networks,a data collection protocol for Wireless Sensor Network(WSN)based on dichotomy and mobile Sink called PBDM is proposed.The network is divided into two equal subdomains by the dichotomy,the intersection of two domains is the trajectory of mobile Sink.With the increase of mortality rate of sensors,and the inner subdomain is divided into two equal areas by the dichotomy,which can identify and change the trajectory of the mobile Sink.The entire network is controlled by topology,where static and mobile Sink nodes coexist.Cluster heads collect interests in the cluster and send the data to the nearest Sink with minimum hop counts.Simulation results show that PBDM is better than LEACH in the base station to obtain information,the remaining energy of the network and the number of surviving nodes.It can improve the efficiency of data collection and prolong the lifetime of WSN.%为延长网络生存周期,提出一种基于二分法与移动Sink的无线传感器网络数据收集协议PBDM.将网络分为面积相等的2个子域,子域交线为移动Sink的轨迹,随节点死亡率的增加,对内部子域进行二分,确定并改变移动Sink的轨迹.移动Sink与固定Sink并存,网络采用拓扑控制,簇头收集簇内兴趣事件并发送至距自己跳数最小的Sink.仿真结果表明,PBDM在基站获取信息量、网络剩余节点数和剩余能量上优于LEACH算法,明显提高数据的收集效率,并延长无线传感器网络的生存周期.
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