在无线传感器网络(WSn)中,当有数据流传输时,一些节点会因网络能量分布不均而过早失效,使得源节点不得不通过另一条更长且低效的路径才能将数据包路由至目的节点,从而影响网络寿命.为了延长网络的生存时间,需要设计能量有效的协议,适应传感器网络的特点.提出了一种电池感知的双向搜索路由(bATTEry-AWArE bI-dIrECTIOnAl SEArCHrOuTIng PrOTOCOl,bAr-bIdS)协议,该协议通过改进深度优先搜索,能在网络中已有部分节点因能量耗尽而失效的情况下,找到一条跳数相对较少的路径,从而减少网络中的能量消耗.且该协议能较好感知节点的电池状态,减少节点电池的放电损耗.仿真结果表明,当网络中有数据流传输时,bAr-bIdS协议能较好均衡全网节点的能量消耗、延长网络存活时间.When there has streaming data transmission in the wireless sensor networks(WSN),some nodes might die owing to exhausting their energy,which makes the source node has to route data packets to the destination node through a longer but inefficient path and furtherly influences the lifetime of the network.In order to prolong the network life span,energy-efficient protocols should be designed to adapt the characteristic of WSN.We propose a battery-aware bi-directional search routing(BAR-BIDS) protocol.By making better the depth first search algorithm,the network can find a path with less hops to route the data packet in the case of many nodes are failure because of energy depletion.Moreover this protocol can obtain the battery status well and decrease the discharging loss.The simulation results prove the good performance of BAR-BIDS protocol in balancing the energy consumption and prolonging the lifetime of the whole network,when there has streaming data transmission in the network.福建省重大科技专项(2007HZ0003);福建省重点科技项目(2008H0037
