智能配电网WSNs可靠性保障机会路由算法研究

Research on Reliability-Guaranteed Opportunity Routing Algorithm for Smart Distribution Power Grid WSNs

针对智能配电网无线通信链路质量较差,以致数据传输可靠性不高这一现状,为保障WSNs数据的可靠和实时传输、均衡节点能量消耗,以及延长网络生存周期,提出一种长跳步可靠性保障机会路由算法(Long-hop Reliability Guarantee Opportunity Routing Algorithms,LRGOR)。基于应用期望可靠性、源节点与汇聚节点间距离以及节点无线通信链路质量,优化候选转发节点集的数量,在满足期望可靠性的基础上,有效降低网络能量消耗和候选转发节点协调的复杂性;在候选转发节点集的选择和优先级设置上,综合考虑节点链路质量、节点相对剩余能量,以及节点与汇聚节点间距离;为避免不必要数据的重复传输,采用一种基于候选转发节点优先级顺序的时间ACK转发机制。仿真结果表明,在满足期望可靠性的基础上,本文所提LRGOR算法有效降低能量消耗,进而延长了网络生存周期。

Due to the poor quality of wireless communication links in smart distribution power grid,the reliability of data transmission is not high.In order to ensure the reliable and real-time transmission of WSNs data,together with the balance of node energy consumption and the prolonging the network life,one long-hop reliability-guaranteed opportunity routing algorithm is proposed in this paper.Based on the expected application reliability,the distance between the source node and the Sink node,and the quality of the node’s wireless communication link,the number of candidate forwarding node sets is optimized,the network energy consumption and complexity of candidate forwarding node coordination is effectively reduced when the expected reliability is guaranteed.As for the candidate forwarding node set selection and their priorities setting,the node link quality,the node relative residual energy,and the distance between the node and the Sink node are comprehensively considered.In order to avoid the unnecessary data repeated transmission,based on the priority order of the candidate forwarding nodes,one time ACK forwarding mechanism is further proposed.Simulation results show that the proposed LRGOR algorithm in this paper can effectively reduce the energy consumption and prolong the network life cycle while guaranteeing the expected reliability.