一种新的能量有效性无线传感网节点设计

New Energy-Efficient Node for Wireless Sensor Networks

当无线传感网运用于恶劣、时变的环境中,如何使网络的生命周期最大化,并满足一定QoS要求,成为无线传感网在这些应用领域广泛应用的关键问题。主要提出了一种基于直扩通信体制的双内核节点架构,不仅能满足复杂环境中的通信性能要求,并且功耗较低。该节点的设计主要采用了软硬件相结合的动态能量管理策略以及参数可调的软件无线电设计,通过底层的灵活设计为无线传感网各层协议的设计提供了一个良好的测试和实践平台,从而研究、设计新的物理层及上层协议来减少非理想硬件平台的功耗,提高整个网络的生存时间和通信性能。

For the applications of Wireless Sensor Networks（WSN） randomly deployed in the complicated and timevarying environment,the most important challenge is to design sensor networks that require long system lifetimes and some metrics for the Quality of Service（QoS）.To design such sensor networks,we propose a sensor node with dual-processor framework which is based on the Direct-Sequence Spread-Spectrum （DSSS）.The sensor node meets the requirement of communication＇s performance in the time-varying environment with low power.Considering the parameters of the underlying hardware and physical layer which can be used at all levels of the hierarchy,we offer a more suitable platform for test and application of wireless sensor networks.We also show how to reduce energy consumption of non-ideal hardware and satisfy the communication capability through Dynamic Voltage Scaling（DVS） and Software Radio（SR） design.