The wireless sensor network (WSN) is one of the budding exploring areas and fast rising fields in wireless communications. The sensor nodes in the network are generally small-size, low-cost, low-power and multi-functi...The wireless sensor network (WSN) is one of the budding exploring areas and fast rising fields in wireless communications. The sensor nodes in the network are generally small-size, low-cost, low-power and multi-function capabilities. Wireless sensor networks (WSNs) are used for various applications;since numerous sensor nodes are usually deployed on remote and inaccessible places, the employment and preservation should be easy and scalable. Sensor nodes in the field being run out of energy quickly has been an issue and many energy efficient routing protocols have been proposed to solve this problem and preserve the long life of the network. This paper work proposes a hierarchical based node activation routing technique which shows energy efficiency. This technique selects cluster head with highest residual energy in each communication round of transmission to the base station from the cluster heads. Hierarchical based node activation routing technique with different levels of hierarchy simulation results prolongs the lifetime of the network compared to other clustering schemes and communication rounds of simulation increase significantly.展开更多
Wireless sensor networks applications involve a position of inaccessible metropolitan vicinity en-closed by wireless sensor nodes (WSNs)-monitors environmental parameters like battle field surveillance, home applicati...Wireless sensor networks applications involve a position of inaccessible metropolitan vicinity en-closed by wireless sensor nodes (WSNs)-monitors environmental parameters like battle field surveillance, home applications like fire alarm, health monitoring, etc. Energy plays a vital role in Wireless sensor networks. So, we have to concentrate more on balanced energy consumption for maximizing the network lifetime. Minimizing the whole network overhead and vigor disbursement coupled with the multi-hop data reclamation process that ensuring balanced energy consumption among SNs which results in prolonged network lifetime. This can be achieved by forwarding the sensed data to their cluster heads and then filtering the data before sending it to their tryst nodes, which is located in proximity to MS’s trajectory. Sleep and awakening of nodes periodically helps to retain their energy for some more time. The events occurring in any part of the network should be identified by the nodes, while arrangements sleep and active among the nodes. (i.e.) the nodes should be scheduled to sleep, so that the outstanding nodes can take care of the whole network. The eXtensible Randomized Matrix Arithmetic Coding (XRMAC) Technique has been used to enhance the security among all the nodes in the network. Simulation results show that our Proposed Scheme can have better Lifetime, improved throughput, reduced delay compared to other existing methods.展开更多
分析了RSSI(received signal strength indicator)测距的原理及环境对RSSI的影响。论述了高斯模型校正算法,该算法中因含有与环境相关的路径散逸指数而产生较大测距误差。针对这一问题,提出了基于锚节点的高斯校正算法,该算法以锚节点...分析了RSSI(received signal strength indicator)测距的原理及环境对RSSI的影响。论述了高斯模型校正算法,该算法中因含有与环境相关的路径散逸指数而产生较大测距误差。针对这一问题,提出了基于锚节点的高斯校正算法,该算法以锚节点对之间的已知距离和测量的RSSI值为参考,对由被测RSSI值得到的距离进行校正,消除了路径散逸指数,并用网络连通信息和RSSI联合定位。仿真结果证明:采用锚节点的高斯校正算法进行定位不受环境影响,不同环境下最大定位波动为0.11%,定位误差显著减小,可应用到实际的无线传感器网络的定位系统中。展开更多
为了实现网络覆盖控制的优化,减少网络能耗,本文提出一种高效节能、采用轮换"活跃"和"休眠"的分布式节点调度算法(Distributed and Location-free Node Scheduling,DLNS)。该算法将节点分组成几个节点集合,并让每...为了实现网络覆盖控制的优化,减少网络能耗,本文提出一种高效节能、采用轮换"活跃"和"休眠"的分布式节点调度算法(Distributed and Location-free Node Scheduling,DLNS)。该算法将节点分组成几个节点集合,并让每一个节点集合依次轮流工作,其余则进入休眠状态。仿真结果表明,该算法解决了覆盖分不均匀问题,减少了活跃工作节点的数量,并降低能耗,从而延长网络寿命。展开更多
文摘The wireless sensor network (WSN) is one of the budding exploring areas and fast rising fields in wireless communications. The sensor nodes in the network are generally small-size, low-cost, low-power and multi-function capabilities. Wireless sensor networks (WSNs) are used for various applications;since numerous sensor nodes are usually deployed on remote and inaccessible places, the employment and preservation should be easy and scalable. Sensor nodes in the field being run out of energy quickly has been an issue and many energy efficient routing protocols have been proposed to solve this problem and preserve the long life of the network. This paper work proposes a hierarchical based node activation routing technique which shows energy efficiency. This technique selects cluster head with highest residual energy in each communication round of transmission to the base station from the cluster heads. Hierarchical based node activation routing technique with different levels of hierarchy simulation results prolongs the lifetime of the network compared to other clustering schemes and communication rounds of simulation increase significantly.
文摘Wireless sensor networks applications involve a position of inaccessible metropolitan vicinity en-closed by wireless sensor nodes (WSNs)-monitors environmental parameters like battle field surveillance, home applications like fire alarm, health monitoring, etc. Energy plays a vital role in Wireless sensor networks. So, we have to concentrate more on balanced energy consumption for maximizing the network lifetime. Minimizing the whole network overhead and vigor disbursement coupled with the multi-hop data reclamation process that ensuring balanced energy consumption among SNs which results in prolonged network lifetime. This can be achieved by forwarding the sensed data to their cluster heads and then filtering the data before sending it to their tryst nodes, which is located in proximity to MS’s trajectory. Sleep and awakening of nodes periodically helps to retain their energy for some more time. The events occurring in any part of the network should be identified by the nodes, while arrangements sleep and active among the nodes. (i.e.) the nodes should be scheduled to sleep, so that the outstanding nodes can take care of the whole network. The eXtensible Randomized Matrix Arithmetic Coding (XRMAC) Technique has been used to enhance the security among all the nodes in the network. Simulation results show that our Proposed Scheme can have better Lifetime, improved throughput, reduced delay compared to other existing methods.
文摘分析了RSSI(received signal strength indicator)测距的原理及环境对RSSI的影响。论述了高斯模型校正算法,该算法中因含有与环境相关的路径散逸指数而产生较大测距误差。针对这一问题,提出了基于锚节点的高斯校正算法,该算法以锚节点对之间的已知距离和测量的RSSI值为参考,对由被测RSSI值得到的距离进行校正,消除了路径散逸指数,并用网络连通信息和RSSI联合定位。仿真结果证明:采用锚节点的高斯校正算法进行定位不受环境影响,不同环境下最大定位波动为0.11%,定位误差显著减小,可应用到实际的无线传感器网络的定位系统中。
文摘为了实现网络覆盖控制的优化,减少网络能耗,本文提出一种高效节能、采用轮换"活跃"和"休眠"的分布式节点调度算法(Distributed and Location-free Node Scheduling,DLNS)。该算法将节点分组成几个节点集合,并让每一个节点集合依次轮流工作,其余则进入休眠状态。仿真结果表明,该算法解决了覆盖分不均匀问题,减少了活跃工作节点的数量,并降低能耗,从而延长网络寿命。
