A cluster-based organization with two phases to separate priority calculation and network activity operations is developed. In the election-state phase, clusters are organized by those nodes with sufficient residual e...A cluster-based organization with two phases to separate priority calculation and network activity operations is developed. In the election-state phase, clusters are organized by those nodes with sufficient residual energy level(REL) that are distributed as evenly as possible in the network. For each network round, each node decides its role(such as, cluster header(CH) or a normal node) and its priority level for activity operation. The priority level also affects the active/sleep scheduling in the node. In the steady-state phase, the positive priority levels of active nodes determine their activity order to avoid transmission collision, and to reduce redundant data transmission and sensing coverage. Since the data reporting to the sink is usually performed by a CH delivery chain, subsidiary CHs are selected to assist with data delivery and to share the loading of CHs. The formulae for computing priority levels are analyzed and verified by the examples with valid parameters. The experimental results show that the two phases efficiently consume node energy and achieve energy savings.展开更多
为减少分簇感知网络数据通信量、延长网络生命周期,提出一种结合混合压缩感知(CS)技术的分簇无线传感器网络数据收集方法。该方法按地理位置划分感知区域为若干簇,并假设各簇区域中心存在一个虚拟簇头节点,且选取虚拟簇头节点一跳通信...为减少分簇感知网络数据通信量、延长网络生命周期,提出一种结合混合压缩感知(CS)技术的分簇无线传感器网络数据收集方法。该方法按地理位置划分感知区域为若干簇,并假设各簇区域中心存在一个虚拟簇头节点,且选取虚拟簇头节点一跳通信范围内的节点为候选簇头节点,使用Prim算法以sink为根节点连接各虚拟簇头节点生成一棵最小生成树,由sink节点开始,为最小生成树各分支中的簇从候选簇头节点中动态规划选出簇头节点,构造以sink节点为根节点且按最小生成树顺序连接各簇头节点的数据传输骨干树。仿真结果表明,当压缩率为10时,与clustering without CS、SPT without CS、SPT with hybrid CS和clustering with hybrid CS方法相比,该方法通信量分别减少了65%、55%、40%和10%。展开更多
基金the National Natural Science Foundation of China(No.71201172)
文摘A cluster-based organization with two phases to separate priority calculation and network activity operations is developed. In the election-state phase, clusters are organized by those nodes with sufficient residual energy level(REL) that are distributed as evenly as possible in the network. For each network round, each node decides its role(such as, cluster header(CH) or a normal node) and its priority level for activity operation. The priority level also affects the active/sleep scheduling in the node. In the steady-state phase, the positive priority levels of active nodes determine their activity order to avoid transmission collision, and to reduce redundant data transmission and sensing coverage. Since the data reporting to the sink is usually performed by a CH delivery chain, subsidiary CHs are selected to assist with data delivery and to share the loading of CHs. The formulae for computing priority levels are analyzed and verified by the examples with valid parameters. The experimental results show that the two phases efficiently consume node energy and achieve energy savings.
文摘为减少分簇感知网络数据通信量、延长网络生命周期,提出一种结合混合压缩感知(CS)技术的分簇无线传感器网络数据收集方法。该方法按地理位置划分感知区域为若干簇,并假设各簇区域中心存在一个虚拟簇头节点,且选取虚拟簇头节点一跳通信范围内的节点为候选簇头节点,使用Prim算法以sink为根节点连接各虚拟簇头节点生成一棵最小生成树,由sink节点开始,为最小生成树各分支中的簇从候选簇头节点中动态规划选出簇头节点,构造以sink节点为根节点且按最小生成树顺序连接各簇头节点的数据传输骨干树。仿真结果表明,当压缩率为10时,与clustering without CS、SPT without CS、SPT with hybrid CS和clustering with hybrid CS方法相比,该方法通信量分别减少了65%、55%、40%和10%。
