id	keyword
cana-655	parking
cana-655	system
cana-655	smart
cana-655	iot
cana-655	time
cana-655	data
cana-655	rfid
cana-655	spots
cana-655	sensors
cana-655	user
cana-655	analysis
cana-655	vol
cana-655	app
cana-655	issn