From: Demonstrability of Narrowband Internet of Things technology in advanced metering infrastructure
Component | Description |
---|---|
Data source | (a) Packet type I, 30 bytes, generated from a serial port of laptops. (b) Packet type II, more than 100 bytes, generated from concentrator of the automatic meter reading system. |
End devices | Include five end devices, each one is an integrated module and it operates in stand-alone modes. The integrated module bases on Boudica120 chip, the operating frequency is 850 MHz. |
OceanConnect | Commercial cloud platform, mainly in charge of transparent forwarding data. |
Local server | In charge of collecting data from cloud platform and sending commands to the NB-IoT end devices. |
NB-IoT network | Bases on China Telecom NB-IoT network which have covered most of cities in China. At present, for one pack from the endpoints, the max size of 512 bytes could be supported. |
Transport protocol | (a) Https establishes secure communication between cloud paltform and local server. (b) Constrained application protocol (CoAP), a specialized Internet application protocol for constrained devices which enables the end devices to communicate with Internet. |