一种基于协同 MIMO 的无线传感器网络传输方案  

A novel cooperative MIMO-based transmission scheme for wireless sensor networks

作　　者：张余[1] 蔡跃明 陈贤明[1] 谢威[1] 徐友云[1] 

机构地区：[1]解放军理工大学通信工程学院无线通信系,南京210007

出　　处：《高技术通讯》2008年第11期1141-1147,共7页Chinese High Technology Letters

基　　金：国家自然科学基金(60672079);江苏省自然科学基金(BK2007002;BK2006701)

摘　　要：针对无线传感器网络中能量有限和能耗不均衡问题,提出了一种基于协同多输入多输出(MIMO)的无线传感器网络传输方案,此方案利用有限比特的反馈信息实时调整簇头节点(CH)和协同簇头节点(CCHs)的发射功率并动态地更新协同簇头节点,减少协同簇头节点的能耗。在给定误比特率条件下,为使网络总能耗最小,对传输速率和协同簇头节点数进行联合优化,给出了均衡簇内节点能耗的算法。理论分析和仿真结果表明,此方案既能有效降低网络的总能耗,又能均衡网络中节点的能耗。The paper proposes a novel cooperative MIMO-based transmission scheme to reduce the total energy consumption and balance energy consumption in wireless sensor networks （WSNs）. The scheme uses the limited bit-feedback to adjust the transmission power of the cluster head （CH） and cooperative cluster heads （CCHs）, and automatically update CCHs, which ensures that CCHs＇ energy consumption can be reduced with a given BER. In order to minimize the total energy consumption in WSNs, the paper jointly optimizes the transmission rate and the number of CCHs, and proposes an algo- rithm to balance the intra-cluster nodes＇ energy consumption. The analysis and numerical results show that theproposed scheme can effectively reduce the total energy consumption and balance the energy consumption.

关 键 词：无线传感器网络(WSN) 协同MIMO 有限反馈 能耗均衡 

分 类 号：TN919.72[电子电信—通信与信息系统] TP212.9[电子电信—信息与通信工程]