In order to reduce power consumption of sensor nodes and extend network survival time in the wireless sensor network （WSN）, sensor nodes are scheduled in an active or dormant mode. A chain-type WSN is fundamental y ...In order to reduce power consumption of sensor nodes and extend network survival time in the wireless sensor network （WSN）, sensor nodes are scheduled in an active or dormant mode. A chain-type WSN is fundamental y different from other types of WSNs, in which the sensor nodes are deployed along elongated geographic areas and form a chain-type network topo-logy structure. This paper investigates the node scheduling prob-lem in the chain-type WSN. Firstly, a node dormant scheduling mode is analyzed theoretical y from geographic coverage, and then three neighboring nodes scheduling criteria are proposed. Sec-ondly, a hybrid coverage scheduling algorithm and dead areas are presented. Final y, node scheduling in mine tunnel WSN with uniform deployment （UD）, non-uniform deployment （NUD） and op-timal distribution point spacing （ODS） is simulated. The results show that the node scheduling with UD and NUD, especial y NUD, can effectively extend the network survival time. Therefore, a strat-egy of adding a few mobile nodes which activate the network in dead areas is proposed, which can further extend the network survival time by balancing the energy consumption of nodes.展开更多
目前基于能量均衡的低功耗有损网络路由协议RPL(Routing Protocol for Lowpower and lossy networks)在网络拓扑构建的过程中由于未考虑备选父节点上一跳节点的期望寿命,从而导致所构建的网络不能较好地实现能量均衡的问题。对此提出一...目前基于能量均衡的低功耗有损网络路由协议RPL(Routing Protocol for Lowpower and lossy networks)在网络拓扑构建的过程中由于未考虑备选父节点上一跳节点的期望寿命,从而导致所构建的网络不能较好地实现能量均衡的问题。对此提出一种基于期望寿命的能量均衡RPL(Expected Life Time-based Energy Balance RPL,ELT-EB-RPL)。构造一种复合路由判据,包括传输跳数、期望传输次数和节点期望寿命,同时,节点在选择最优父节点时需综合考虑其备选父节点及备选父节点上一跳节点的期望寿命。在不增加额外控制开销的前提下,提出一种“节点间期望寿命信息通告”策略,以便节点作出正确的路由选择。通过仿真实验对该方案的性能进行了对比分析。结果表明,在不同发包速率下该方案能够有效实现能量均衡和延长网络寿命。展开更多
基金supported by the China Doctoral Discipline New Teacher Foundation(200802901507)the Sichuan Province Basic Research Plan Project(2013JY0165)the Cultivating Programme of Excellent Innovation Team of Chengdu University of Technology(KYTD201301)
文摘In order to reduce power consumption of sensor nodes and extend network survival time in the wireless sensor network （WSN）, sensor nodes are scheduled in an active or dormant mode. A chain-type WSN is fundamental y different from other types of WSNs, in which the sensor nodes are deployed along elongated geographic areas and form a chain-type network topo-logy structure. This paper investigates the node scheduling prob-lem in the chain-type WSN. Firstly, a node dormant scheduling mode is analyzed theoretical y from geographic coverage, and then three neighboring nodes scheduling criteria are proposed. Sec-ondly, a hybrid coverage scheduling algorithm and dead areas are presented. Final y, node scheduling in mine tunnel WSN with uniform deployment （UD）, non-uniform deployment （NUD） and op-timal distribution point spacing （ODS） is simulated. The results show that the node scheduling with UD and NUD, especial y NUD, can effectively extend the network survival time. Therefore, a strat-egy of adding a few mobile nodes which activate the network in dead areas is proposed, which can further extend the network survival time by balancing the energy consumption of nodes.
文摘目前基于能量均衡的低功耗有损网络路由协议RPL(Routing Protocol for Lowpower and lossy networks)在网络拓扑构建的过程中由于未考虑备选父节点上一跳节点的期望寿命,从而导致所构建的网络不能较好地实现能量均衡的问题。对此提出一种基于期望寿命的能量均衡RPL(Expected Life Time-based Energy Balance RPL,ELT-EB-RPL)。构造一种复合路由判据,包括传输跳数、期望传输次数和节点期望寿命,同时,节点在选择最优父节点时需综合考虑其备选父节点及备选父节点上一跳节点的期望寿命。在不增加额外控制开销的前提下,提出一种“节点间期望寿命信息通告”策略,以便节点作出正确的路由选择。通过仿真实验对该方案的性能进行了对比分析。结果表明,在不同发包速率下该方案能够有效实现能量均衡和延长网络寿命。
