The 3GPP had standardized NB-IoT - in June 2016. It provides deep indoor and wide area coverage extension of 20dB over GSM. The NB-IOT network can support 50,000 users per cell and a battery life of more than ten years. The key problems of the NB-IoT network protocol are the coordination & communication between large number of IoT devices & the base station. Using the Beam Switching WPT (wireless power transfer) antenna array (BS-WPT antenna array) technology, the cell coverage could be separated into several partitions to wake up IoT devices within one partition of the cell to avoid the collision. The BS-WPT antenna array has been designed & analyzed in this paper for the polling protocol to solve the problem of communication and collision between 50,000 IoT devices per cell within the base station.
2016 Asian Wireless Power Transfer Workshop (AWPT 2016)