NB-IoT is Narrow Band-Internet of Things. It is a narrowband Internet of Things technology based on cellular networks. It focuses on low-power wide area networks and supports the cellular data connection of Internet of Things devices in the wide area network. It can be directly deployed with LTE networks, which can reduce Deployment costs and smooth upgrades are an IoT technology that can be widel···

LPWAN, Low Power Wide Area Network, Low Power Wide Area Network. There are two of its most important features in the name: low power consumption and wide coverage. Currently the more mainstream ones are: NB-IoT, LoRa, Sigfox, eMTC. The full name of NB-IoT is Narrow Band IoT, which is the narrowband Internet of Things (narrow bandwidth and slow speed).

LoRa's terminal nodes may be various devices, such as water and gas meters, smoke alarms, pet trackers, etc. These nodes are first connected to the LoRa gateway through LoRa wireless communication, and then connected to the network server through a 3G network or an Ethernet network. The gateway and the network server communicate through the TCP/IP protocol.

LoRa networking:The LoRaWAN network architecture is a typical star topology. In this network architecture, the LoRa gateway is a transparent transmission relay, connecting terminal devices and the back-end central server. The terminal device uses a single hop to communicate with one or more gateways. All nodes communicate with the gateway in both directions.

In summary, the application of NB-IoT is divided into four fields: public service field, personal field, industrial manufacturing field, new technology and new business field. Among them, smart metering of water, electricity and gas meters, public parking management, and environmental monitoring are listed as entry points in the field of public services.

NB-IoT is an emerging Internet of Things technology, which has attracted attention because of its low power consumption, stable connection, low cost, and excellent architecture optimization. Using the license frequency band, three deployment methods such as in-band, guardband or independent carrier can be adopted. , Coexist with the existing network.

The data transfer unit DTU (Data Transfer unit) is a wireless terminal device specially used to convert serial data to IP data or convert IP data to serial data to be transmitted through a wireless communication network. The entire Netcom DTU covers the entire network, and the Internet of Things gateway is also Can carry out data transmission, so what is the difference between Netcom DTU and IoT g···

The Internet of Things based on LTE technology is a brand-new Internet of Things technology that brings many advantages to the application of the Internet of Things, including extensive and deep network coverage, predictable service quality, highly reliable and stable end-to-end security and global standard support The seamless interoperability will bring more opportunities for the Internet of Thi···

Industrial gateways are also called IoT gateways. As the link between the perception layer and the network layer, the IoT gateway can realize the protocol conversion between perception networks and communication networks, as well as different types of perception networks, which can realize wide-area interconnection or realization Local area interconnection. Today we will take a look at the key tec···

Cellular-based Narrow Band Internet of Things (NB-IoT) has become an important branch of the Internet of Everything. NB-IoT is built on a cellular network and consumes only about 180KHz of bandwidth. It can be directly deployed on GSM networks and UMTS networks. Or LTE network to reduce deployment costs and achieve smooth upgrades. These issues of the NB-IoT protocol of the Narrowband Internet of ···