摘要
Wireless sensor network is becoming more and more popular in recent years, but energy- constrained characteristic of sensor nodes is one of the critical issues that we must consider in system design. In this paper, a cluster-based virtual VBLAST transmission scheme is proposed to achieve energy savings for energy-constrained wireless sensor networks. In the proposed scheme, instead of using cluster member as cooperative nodes, multiple cluster heads cooperate to form virtual antenna array so that V-BLAST based virtual MIMO transmission can be implemented. Based on the communication energy consumption model, a way to optimize the parameters for the scheme is given. In addition, detailed simulation is performed to evaluate the performance of the proposed scheme for both densely and sparsely deployed sensor networks. Theoretical analysis and simulation results verify the energy efficiency of the proposed scheme.
作者简介
Ding Jie, is currently working toward the Ph.D. degree in infor- mation and communication engineering at the Key Laboratory of Universal Wireless Communication, Ministry of Education, Bei- jing University of Posts and Telecommunications, Beijing, China. His current research interests include wireless sensor networks, Wireless communications and cross-layer design.Liu Danpu, is currently working at the Key Laboratory of Universal Wireless Communication, Ministry of Education, Beijing University of Posts and Telecommunications, Beijing, China. She is a professor since 2005. Her general research interests include wireless communication, wireless sensor networks and ultra wide band communication.Wu Huari is currently working at Beijing Academy of Agriculture and Forestry Sciences, Beijing, China. He is an associate researcher now. His general research interests include artificial intelligence and mobile computing.
