全双工环境反向散射通信网络的绿色物联网

Green Internet of Things based on full-duplex environment backscatter communication network

基于物联网的瓶颈问题,对将作为未来物联网核心技术的反向散射技术进行分析和研究。首先研究传统的反向散射技术在射频识别系统中的应用,并进一步探讨存在的问题与不足;随后基于物联网射频识别技术的局限性及在新型反向散射技术,描叙一种全双工环境反向通信网络系统模型。该模型通过一种环境反向散射通信网络访问方式,即在接入全双工接入点的同时向其用户发送下行正交频分复用信号,并以时分多址接收从多个反向散射设备反向散射的上行链路信号。环境反向散射通信通过环境中射频载波传输信息的反向散射设备无线供电,更加环保和节能,满足未来物联网对能源、成本和复杂性的严格限制。

As the future core technology of IoT(Internet of Things),the backscatter technologyis analyzed and studied to deal with the bottleneck problem of the IoT.Firstly,the application of traditional backscatter technology in RFID(radio frequen cy identification)system is studied,and the existing problems and deficiencies are further explored.Then a full duplex environ ment backscatter communication network system model is described on the basis of the new backscattering technology and the limitations of IoT RFID technology.This model sends the downlink orthogonal frequency division multiplexing signal to its users in an access mode of environmental backscatter communication while accessing the full duplex access point,and receives the up link signal backscattered from multiple backscatter devices by time division multiple address.The environmental backscatter communication is powered wirelessly by the backscatter equipment that transmits information via the radio frequency carrier in the environment,which is more environmentally friendly and energy saving,and can meet the strict constraints of the future IoT in the aspects of energy,cost and complexity.