摘要
针对异步无线传感器网络邻居发现问题,提出一种基于Quorum系统异步自适应非对称调度机制。其核心思想是使节点根据网络的拥塞状况、通信量等自适应地选择质数网格的循环长度,然后在质数网格中采用Quorum选择侦听帧并广播通知其邻居节点,从而可以保证每对邻居节点一定能够在有限的时间内完成邻居发现。由于质数网络的非空交叉特性,即使节点时钟不同步,无需采用时间同步协议,该机制也能够保证网络的连通性。仿真结果表明,3ASM与AQEC、Grid相比,节省了网络能量损耗,延长了网络的使用周期。
In order to address the issue of neighbour discovery in wireless sensor networks,we propose a Quorum system-based asynchronous adaptive asymmetric scheduling mechanism. The core idea of it is that the node chooses the cycle length of the prime grid adaptively according to the congestion status of networks and the node＇s communication demand. Then,in prime grid the node uses Quorum to select the interception frames and informs its neighbouring nodes via radio,so that each pair of neighbour nodes can be guaranteed to complete neighbour discovery within the limited time with no doubt. Because of the non-empty intersection property of the prime grid,the mechanism can guarantee the connectivity of the network without using the time synchronisation protocol even if the time of nodes is asynchronous. Simulation results show that 3ASM reduces the network energy consumption and prolongs the network lifetime compared with AQEC and Grid.
出处
《计算机应用与软件》
CSCD
2015年第12期71-73,96,共4页
Computer Applications and Software
基金
国家自然科学基金项目(51174263)
教育部博士点基金项目(20124116120004)
河南省教育厅科学技术研究重点项目(12B510011
12A520022)
河南理工大学博士基金项目(B2013036)
关键词
无线传感器网络
异步
自适应
非对称
Wireless sensor networks
Asynchronous
Adaptive
Asymmetric
