采用转发优先级的水下传感网络的机会路由

Forwarding Priority-Based Opportunistic Routing in Underwater Sensor Networks

机会路由OR(Opportunistic Routing)在水下传感网络中广泛应用。然而,现存OR协议忽略了一个问题:转发节点采用恒定转发优先级,其加剧了部分节点的能耗,也未能平衡节点间的能量消耗。为此,提出基于轮换转发优先级的机会路由RFP-OR(Rotating Forwarding Priority-based OR)。RFP-OR路由利用节点剩余能量,链路可靠性和水压差值构建候选转发节点集,再计算候选转发节点集内每个节点的适度值,并依据适度值给节点设置转发优先级。最后,依据节点的转发优先级设置定时器,进而产生下一跳转发节点。仿真数据表明,提出的RFP-OR路由的活动节点数得到有效的提高,并且数据包传递率也得到了提升。

For underwater sensor networks(USNs),Opportunistic routing(OR)has emerged as a promising paradigm to the design of routing protocols.However,it neglects a critical problem:the immutable transmission priority level of the next-hop forwarding nodes.The characteristics can lead to quickly deplet its battery,and not achieve energy balance.Therefore,Rotating Forwarding Priority-based OR(RFP-OR)is proposed in this paper.RFP-OR considers the remaining energy,link reliability and different depth to select candidate nodes.Then the fitness of each node in candidate nodes set is computed,and the time of timer is set by the fitness to select the next-hop node.Simulation results show that RFP-OR protocol has a good performance in terms of numbers of alive nodes and packet delivery ratio.