Design And Implementation Of Broadband Micro-power Protocol Analysis System

With the gradual improvement of the Ubiquitous Electric Internet of Things(UEIOT),it brings more requirements on the access network technology.The broadband micro-power in the research and development can co-build with broadband power line carrier communications,hereby enriching the technical reserve of the UEIOT.Broadband micro-power networks are deployed in complex environments to communicate using unstable wireless links,which brings certain difficulties for research and deployment of broadband micro-power networks.To solve the problems above,the broadband micro-power protocol analysis system can monitor and analyze the network status without disturbing the normal operation of the network.The whole system consists of the data capture processing subsystem and protocol analysis subsystem.In the data capture processing subsystem,the distributed data capture scheme is designed for addressing the shortcoming of centralized capture data.Arranging capture devices at various locations on the network to capture data of the network,more comprehensive data can be captured than centralized capture scheme.Secondly,take advantage of broadband micro-power network features,this thesis proposes a time synchronization strategy for capturing data based on the timestamp of the target network.The strategy does not need to add a timing module to the capture device,and the complexity is lower than the time synchronization strategy based on duplicated data.In addition to using the pcap file format to save data,the 1-level index file is used to quickly find and filter specific packets within a single pcap file.On this basis,the 2-level index file format is designed to save the synchronized fusion data and retaining the original pcap information.Finally,the data is parsed through the designed parsing module.In the protocol analysis subsystem,this thesis proposes 3 levels of analysis contents to solve the problem of insufficient analysis content in the current protocol analysis systems: analyze the content of a single packet,summarizing the content information of multiple packets,and integrate multi-dimensional information to evaluate network quality.Meanwhile,the system designs a component analysis structure to separate the data,analysis components and the interface.The protocol parsing module provides basic data,the analysis components supports the expansion of various analysis contents,and the interface presents the analysis results.The analysis component includes statistical analysis of important information statistics,dynamic topology visualization analysis combining network topology information and force-oriented layout algorithm,and network performance evaluation analysis based on multi-responses optimization evaluation method.The protocol analysis subsystem provides effective analysis content,but not just the paring and display of protocol messages.It has been verified that the broadband micro-power protocol analysis system has great data capture and monitoring analysis capabilities after tested and deployed.The system also has great auxiliary testing capabilities in the protocol development stage.