Since the Ministry of Industry and Information Technology issued a policy document, it is necessary to build 1.5 million NB-IOT base stations. After the news of the NB-IoT network, the Internet of Things industry suddenly suddenly drought in the long drought, and what NB-IOT base station How to make a network, how to transfer data, these questions are a question:
NB-IoT network composition
The NB-IoT network includes NB-IoT terminals, NB-IoT base stations, NB-IOT packet core, IoT connection management platforms, and industry application servers. It is necessary to upgrade the current network base station to support NB-IOT services, deploy NB-IOT business-specific EPC (CloudEdge), requiring a new deployment connection management platform. The function of the IoT connection management platform: Provides data acquisition and management functions for various sensors, SIM cards, while you can open data to third-party applications, allowing a variety of applications to quickly build their own Internet of Things business.
NB-IoT network
What is an NB-IoT base station?
The NB-IoT base station is a basic unit that constitutes a cellular cell in mobile communication, which is mainly completed between the communication and management functions between the mobile communication network and the UE. That is, the NB-IOT user terminal device connected by the carrier network must communicate within the coverage of the base station signal. The base station is not isolated, which is part of the network architecture, is a bridge that connects the mobile communication network and the UE. The base station is generally composed of an aircraft, signal processing equipment, outdoor RF modules, antenna, GPS, and various transmission cables, and the like of the transmission and reception signal.
NB-IoT base station
How to connect NB-IOT base station
Link through the following agreement
COAP protocol: MCU (NB device) -nb module (UE) - eNode- core network-iot platform -App server - Mobile Terminal APP
UDP protocol: MCU (NB device) -nb module (UE) - ENODE-core network -UDP server - mobile terminal
How to transmit
Data reporting is the most basic one in the Internet of Things business, explains the explanation of several terms first.
Nandwide Equipment: The developer develops the terminal hardware device (including multiple sensors and MCUs).
Northern Application: Services developed by developers (based on the RESTful interface provided by Huawei OceanConnect Internet of Things platform).
NB-IOT: This is not explained, the main network of Internet traffic for the main network of narrow band net, Huawei and other companies.
NB-IOT chip / module: Similar to 3G / 4G communication module, send device-end data packages to the hardware module of the specified platform.
Softradio: The PC-side software for simulating the NB-IoT module, the base station, and the core network can be used to adjust the debug in the lack of the NB module and the NB real-network environment.
OceanConnect: Internet all-connected platform, south-way device and northward application through the platform exchange data and signaling.
Device profile file: Describe the device "Yes", "What" JSON format file is uploaded to the OceanConnect platform (upload is a zip package format), the device binding platform and the key configuration file for the service.
The codec plug-in: The data used to decode the data reported by the NB device, and the inserts encoded by the signaling of the NB device are sent to the OceanConnect platform.
The terminal device will be reported to the Huaw Internet of Things platform by the NB-IoT network, while the next northward data is obtained through the RESTFUL interface (or the platform actively pushes the subscribed data).
Data reporting process
Process:
1, the south-way device collects data, and encodes the data according to custom rules, for example: encoding temperature and humidity real-time data into 000102;
2, the device transmits the encoded data to the NB-IoT module or SoftRadio simulator by serial port, in the form of an AT command.
3, the NB-IOT chip / module or SoftRadio simulator, after receiving the AT command, after payload, automatically encapsulate messages of the COAP protocol, and send it to the IoT platform configured in advance;
4. After receiving the data, the Internet of Things platform automatically parses the COAP protocol package, according to the device profile file, find the matching codec plugin, parse PayLoad, resolve the JSON data that matches the service in the device profile, and exists on the platform Above;
5, the application server obtains the data on the platform through the Northern Data Queries Interface (RESTful); at the same time, you can call the subscription interface in advance. Subscribe to data changes, then all data changes, the platform will pass POST
Original link: https://www.eeboard.com/news/nb-iot-3/
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