With the dense deployment and wide applications of the Internet of Things in railway systems, the location-based security access control scheme is becoming increasingly important. In this study, the received signal strength (RSS) and channel state information (CSI) in railway communications are measured by AR9344 network interface card. Then, based on the measurement data, the authors propose trajectory-based, neural network-based (NN-based) and ray tracing-based (RT-based) localisation algorithms, serving for location-based security access control. Specifically, the trajectory-based algorithm combined with trajectory simulation, movement detection and dynamic time warping algorithms, realises passengers enter/exit pattern detection. The NN-based algorithm leverages back-propagation network (BPN) and constructs training sets with measurement-based RSS and CSI, finishing accurate localisation. Besides, they evaluate the algorithm performance under different layers of BPN. RT-based localisation algorithm combines measurement data and simulation analysis, leveraging simulated-based multiple-input multiple-output received power and delay spread to realise lightweight localisation. After evaluation, the RT-based algorithm can achieve the highest accuracy of localisation, up to 99.9% and is designed to be straightforward for integration with commercial access points and deployment to railway communications.
Localisation algorithm for security access control in railway communications
IET Intelligent Transport Systems ; 14 , 14 ; 2151-2159
2021-03-09
9 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
commercial access points , indoor radio , wireless channels , authorisation , algorithm performance , neural nets , railway systems , railway communications , received signal strength , trajectory simulation , dense deployment , measurement-based RSS , NN-based algorithm , backpropagation , ray tracing , location-based security access control scheme , railway communication , RT-based localisation algorithm , trajectory-based algorithm , CSI , lightweight localisation , neural network-based , Internet of Things , accurate localisation , AR9344 network interface card , MIMO communication , telecommunication security , RSSI , leverages back-propagation network , measurement data
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