两信道物联网协议分析仪的设计与实现

摘要

On the basis of studying Internet of Things(IOT)protocols and wireless RF technology,designing and implementing the two-channel protocol analyzer, which was make up with data collect device and the PC protocol analysis software,using wireless radio frequency technology to capture wireless data packets on any two channels of the 2.4GHz ISM band in real-time,In addition,proposing one fast matching algorithm and applied it to the protocol decoding module which rapidly improve the analysis of the rate of the protocol analyzer. The protocol analyzer have achieve functions like protocol analysising, network monitoring, fault diagnosis and so on, it can works under ISA100.11a,ZigBee,WIA-PA,6LoWPAN,IEEE802.15.4E five IOT protocols. The processing time was less than 10ms and the packet loss rate was less than 1% within 10 meters. The experiment results showed that the analyzer was a simple,real and effective network troubleshooting,testing and performance maintenance tools.%在研究了物联网协议和无线射频技术的基础上,设计并实现了两信道物联网协议分析仪.该分析仪由数据采集器和上位机协议分析软件组成,采用空中捕获的无线射频技术,能实时采集2.4 GHz ISM频段上任意两个信道的无线数据报文；并提出了一种基于特征位的快速匹配算法,应用于协议解码模块,从而快速提高协议分析仪的分析速率.本协议分析仪实现了协议分析、网络监控、故障诊断等功能,可面向ISA100.11a、ZigBee、WIA-PA、6LoWPAN、IEEE802.15.4E五套物联网协议.实验结果表明,该分析仪单帧处理时间小于10s,且10m监控范围内丢包率小于1％,是一款简单、实时和有效的网络查错、测试以及性能维护工具.