“The emergence of the Internet of Things has created such a flood of data that only state-of-the-art information technology can gather, filter, order and interrogate the resulting, massive data set, generically called Big Data, “
ZigBee @ Wikipedia ZigBee is targeted at radio-frequency (RF) applications that require a low data rate, long battery life, and secure networking. ZigBee has a defined rate of 250 kbit/s best suited for periodic or intermittent data or a single signal transmission from a sensor or input device. ZigBee based traffic management system have also been implemented. The name refers to the waggle dance of honey bees after their return to the beehive.
A smart meter is usually an electrical meter that records consumption of electric energy in intervals of an hour or less and communicates that information at least daily back to the utility for monitoring and billing purposes.