一种避免网络间数据碰撞的新型RFID阅读器设计

摘要

为解决航天器上无线射频识别(RFID)网络和其他网络共存时的干扰和碰撞问题,文章提出了一种避免碰撞的新型RFID阅读器的设计,分析和验证了新型RFID阅读器在RFID和紫蜂技术(ZigBee)网络共存时的有效性.新型的RFID阅读器具备竞争接入机制和网络协调能力,在网络共存和互联互通中,起到了一个协调器和中心控制节点的作用,降低了碰撞概率(在仿真分析中可从40%左右降到几乎为0),提高了网络吞吐量.新型RFID阅读器的使用和功效不限于这两种网络的共存情况,在RFID和其他网络的共存时,同样有效.%An enhanced collision-avoidance RFID reader is designed to solve the problem of interferences and collisions in aerospace when RFID coexists with other wireless networks in the ISM bands.And the coexistence of RFID and ZigBee is illustrated to state and verify the effectiveness of the reader.The new RFID reader adopts a mechanism of contention ac-cess and is equipped with an ability of network coordination.When coexisting and intercon-necting with ZigBee,it is working as a coordinator and a controller to reduce the collision probability (from around 40% to almost 0 in the simulation) and to increase the network throughput.Besides solving the coexistence of RFID and ZigBee, the enhanced collision-avoidance RFID reader could also play a significant role when coexisting with other wireless networks.