张正清博士在IEEE Transactions on Wireless Communication发表论文。
Connectivity of Magnetic Induction-Based Ad Hoc Networks
作者:Zhengqing Zhang, Erwu Liu, Senior Member, IEEE, Xinyu Qu, Rui Wang, Honglei Ma, and Zhi Sun
IEEE Transactions on Wireless Communication(VOL. 16, NO. 7, JULY 2017)
连接模型:(a)连接;(b)、(c)未连接
摘要:Magnetic induction (MI) has been proven to be an efficient wireless communication technique for overcoming the transmission challenges in some very harsh propagation environments, such as underground, underwater, etc. For a random distributed MI ad hoc network in a 3-D space composed of uniform medium, we propose a method for determining the required node density and transmitting power that creates an almost surely fully connected network. For which we involve an MI path-loss model and consider the effect of eddy currents, the effective coverage space and the expected node degree of an MI node are then calculated by a Lambert W-function-based integration. Finally, we propose optimized frequency selection methods for improving the connectivity of MI networks. In addition to an ideal frequency-switching optimization method, we provide for engineering applications a practical frequency-fixed optimization method, which is based on the gradient descent algorithm, where an improved initialization is used to reduce iterations.