为建立一个高效节能的路由环境,在分析PEGASIS(Power-Efficient Gathering in Sensor Information System)的基础上,提出一种改进的成链方法——节点分区成链型PEGASIS算法(D-PEGASIS)。该算法通过对节点按位置分组成链的方法,减少网络...为建立一个高效节能的路由环境,在分析PEGASIS(Power-Efficient Gathering in Sensor Information System)的基础上,提出一种改进的成链方法——节点分区成链型PEGASIS算法(D-PEGASIS)。该算法通过对节点按位置分组成链的方法,减少网络中长距离信息传输的次数及能量消耗。仿真实验结果表明,该算法对PEGASIS有较大改进,延长了节点生命周期,且节点之间能量消耗非常均匀。展开更多
为解决传统LEACH(Low Energy Adaptive Clustering Hierarchy)协议网络节点能量消耗高、存活数量少和生存寿命短等问题,提出了一种LEACH-AD改进方案。该算法引入最优簇头比率P值、加入距离因子、剩余能量因子和密度因子等因素更新的阈...为解决传统LEACH(Low Energy Adaptive Clustering Hierarchy)协议网络节点能量消耗高、存活数量少和生存寿命短等问题,提出了一种LEACH-AD改进方案。该算法引入最优簇头比率P值、加入距离因子、剩余能量因子和密度因子等因素更新的阈值公式进行分簇以及簇间的传输。实验结果表明,改进后的LEACH-AD协议在首个死亡节点、10%死亡节点以及全部死亡节点分别比原LEACH协议延长138轮、195轮、628轮。在能量消耗方面比原LEACH协议多持续了631轮,改进后的路由协议减少了网络节点的能量消耗量,从而有效延长了无线网络与传感节点的工作时间,这对无线监测系统的研究与开发意义重大。展开更多
在无线传感器网络的簇间路由协议中,簇头单跳或者多跳通信,都会导致簇头能量消耗不均衡。为了均衡能量消耗,新的协议在LEACH-C协议基础上,引入一个有关距离的阈值,若簇头距离基站的距离小于该阈值,则进行单跳通信;若簇头距离基站的距离...在无线传感器网络的簇间路由协议中,簇头单跳或者多跳通信,都会导致簇头能量消耗不均衡。为了均衡能量消耗,新的协议在LEACH-C协议基础上,引入一个有关距离的阈值,若簇头距离基站的距离小于该阈值,则进行单跳通信;若簇头距离基站的距离大于该阈值,则进行多跳通信,同时提出一种保证时延的簇间多跳路由协议(Distance and Delay Based Cluster Routing Protocol)DDCR协议。经过仿真实验,验证了该方法的可实现性,有效地降低了簇头节点的能量消耗,均衡了网络负载。展开更多
Saving energy and increasing network lifetime are significant challenges in wireless sensor networks （WSNs）. In this paper, we propose a mechanism to distribute the responsibility of cluster-heads among the wireless...Saving energy and increasing network lifetime are significant challenges in wireless sensor networks （WSNs）. In this paper, we propose a mechanism to distribute the responsibility of cluster-heads among the wireless sensor nodes in the same cluster based on the ZigBee standard, which is the latest WSN standard. ZigBee supports ad hoc on-demand vector （AODV） and cluster-tree routing protocols in its routing layer. However, none of these protocols considers the energy level of the nodes in the network establishing process or in the data routing process. The cluster-tree routing protocol supports single or multi-cluster networks. However, each single cluster in the multi-cluster network has only one node acting as a cluster head. These cluster-heads are fixed in each cluster during the network lifetime. Consequently, using these cluster-heads will cause them to die quickly, and the entire linked nodes to these cluster-heads will be disconnected from the main network. Therefore, the proposed technique to distribute the role of the cluster head among the wireless sensor nodes in the same cluster is vital to increase the lifetime of the network. Our proposed technique is better in terms of performance than the original structure of these protocols. It has increased the lifetime of the wireless sensor nodes, and increased the lifetime of the WSN by around 50% of the original network lifetime.展开更多
文摘为建立一个高效节能的路由环境,在分析PEGASIS(Power-Efficient Gathering in Sensor Information System)的基础上,提出一种改进的成链方法——节点分区成链型PEGASIS算法(D-PEGASIS)。该算法通过对节点按位置分组成链的方法,减少网络中长距离信息传输的次数及能量消耗。仿真实验结果表明,该算法对PEGASIS有较大改进,延长了节点生命周期,且节点之间能量消耗非常均匀。
文摘为解决传统LEACH(Low Energy Adaptive Clustering Hierarchy)协议网络节点能量消耗高、存活数量少和生存寿命短等问题,提出了一种LEACH-AD改进方案。该算法引入最优簇头比率P值、加入距离因子、剩余能量因子和密度因子等因素更新的阈值公式进行分簇以及簇间的传输。实验结果表明,改进后的LEACH-AD协议在首个死亡节点、10%死亡节点以及全部死亡节点分别比原LEACH协议延长138轮、195轮、628轮。在能量消耗方面比原LEACH协议多持续了631轮,改进后的路由协议减少了网络节点的能量消耗量,从而有效延长了无线网络与传感节点的工作时间,这对无线监测系统的研究与开发意义重大。
文摘在无线传感器网络的簇间路由协议中,簇头单跳或者多跳通信,都会导致簇头能量消耗不均衡。为了均衡能量消耗,新的协议在LEACH-C协议基础上,引入一个有关距离的阈值,若簇头距离基站的距离小于该阈值,则进行单跳通信;若簇头距离基站的距离大于该阈值,则进行多跳通信,同时提出一种保证时延的簇间多跳路由协议(Distance and Delay Based Cluster Routing Protocol)DDCR协议。经过仿真实验,验证了该方法的可实现性,有效地降低了簇头节点的能量消耗,均衡了网络负载。
文摘Saving energy and increasing network lifetime are significant challenges in wireless sensor networks （WSNs）. In this paper, we propose a mechanism to distribute the responsibility of cluster-heads among the wireless sensor nodes in the same cluster based on the ZigBee standard, which is the latest WSN standard. ZigBee supports ad hoc on-demand vector （AODV） and cluster-tree routing protocols in its routing layer. However, none of these protocols considers the energy level of the nodes in the network establishing process or in the data routing process. The cluster-tree routing protocol supports single or multi-cluster networks. However, each single cluster in the multi-cluster network has only one node acting as a cluster head. These cluster-heads are fixed in each cluster during the network lifetime. Consequently, using these cluster-heads will cause them to die quickly, and the entire linked nodes to these cluster-heads will be disconnected from the main network. Therefore, the proposed technique to distribute the role of the cluster head among the wireless sensor nodes in the same cluster is vital to increase the lifetime of the network. Our proposed technique is better in terms of performance than the original structure of these protocols. It has increased the lifetime of the wireless sensor nodes, and increased the lifetime of the WSN by around 50% of the original network lifetime.
