关键词: 超宽带, 传感器网络, 跨层设计, 优化模型

Abstract: Cross-layer design is a promising approach to promote the performance of wireless sensor networks.This paper studies a UWB-based wireless sensor network and builds a cross-layer optimization model with joint consideration of MAC layer scheduling,PHY layer power control and network layer.The optimization model takes advantage of unique properties of UWB technology,such as huge bandwidth,extremely low power spectral density and large processing gain in the presence of interference and intends to achieve the maximal data rate of whole network.Simulation results show that the optimal solution of cross-layer optimization model can increase the data rate of network obviously and the model can also be used to address the data traffic issues for large-scale networks.It demonstrates that it is feasible and effective to deal with the cross-layer problem by building and resolving the optimization model.

Key words: Ultra Wide Band（UWB）, wireless sensor networks, cross layer design, optimization model