建筑能耗无线监测系统模型及多Sink节点路由策略研究

Research on building energy consumption monitoring system model and routing strategy for multi-sink node

为解决多sink节点无线传感器网络中存在的节点能量消耗不均衡的问题,提出基于比例的动态负载均衡(DRBSLB)多sink节点路由策略。以负载信息量为均衡对象来协调各sink节点,避免部分sink节点负载过重,使负载较轻的sink节点以一定概率多分担一些数据传输任务;并根据总体剩余能量的大小计算出系统整体sink节点能够继续工作的剩余时间最大值,然后对sink节点所服务的node数量进行重新分配,以实现整个网络的能量均衡。仿真结果表明,采用DRBSLB协议后网络中出现节点死亡的时间延长10倍以上。DRBSLB协议改善了各sink节点负载的均衡性,有效延长了网络生存时间。

To solve the problem of energy imbalance existed in the multi-sink wireless sensor network, a dynamic routing strategy for multi-sink wireless sensor network based on ratio shunting for load balancing is presented. The strat- egy coordinates the load of the sink according to the amount of the information, which can avoid overload of some sink node and make the sink whose load is light share more of the data transfer tasks at a certain probability and calculate the maximum value of residual work time in accordance with the overall residual system energy, then re-distribute the number of the node maintained by the sink, in order to achieve the energy balance of the entire network. The simulation results shows that the death time of node can be extended more than 10 times by using this strategy. This strategy improves the balance of each sink and prolongs the network lifetime effectively.