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How much do you know about the terms commonly used in the Internet of Things? (two)

by:Rika Sensors     2021-12-12
How much do you know about the terms commonly used in the Internet of Things? (two)
As the concept of the Internet of Everything is proposed, the Internet of Things is becoming more and more known to the public, and more and more terms related to it.

1, ZigBee

ZigBee is a low-power local area network protocol based on the IEEE802.15.4 standard. According to international standards, ZigBee technology is a short-distance, low-power wireless communication technology. This name (also known as the Zigbee Agreement) comes from the bee’s eight-character dance, because bees rely on the 'dance' of flying and 'zig' shaking their wings to convey the location information of pollen to their companions. That is to say, bees rely on this way to form the communication network in the colony. Its characteristics are close range, low complexity, self-organization, low power consumption, and low data rate. It is mainly suitable for automatic control and remote control, and can be embedded in various devices. In short, ZigBee is a cheap, low-power, short-range wireless networking communication technology. ZigBee is a wireless network protocol for low-speed and short-distance transmission. The ZigBee protocol includes the physical layer (PHY), media access control layer (MAC), transport layer (TL), network layer (NWK), application layer (APL), etc. from bottom to top.

2. Bluetooth (bluetooth)

For the Internet of Things, Bluetooth wireless communication protocol mainly has two forms. One is the standard Bluetooth technology, which is widely used in various smart home devices ranging from networked refrigerators to shower nozzles to door locks; the other is low-power Bluetooth technology, usually referred to as 'BLE'. Large networks of connected devices with limited power consumption are more attractive because battery life is no longer a limiting factor. Both forms have been upgraded in the Bluetooth 5.0 version in December 2016. Bluetooth 5.0 expands the transmission range of Bluetooth devices and improves the data throughput of Bluetooth devices.

3. RFID (Radio Frequency Identification)

Radio Frequency Identification, or radio frequency identification technology, is a type of automatic identification technology. It conducts non-contact two-way data communication through radio frequency and uses radio frequency to communicate with recording media. (Electronic tag or radio frequency card) to read and write to achieve the purpose of identification and data exchange. It is considered to be one of the information technologies with development potential in the 21st century.

The radio frequency identification technology uses radio wave non-contact rapid information exchange and storage technology, combines wireless communication with data access technology, and then connects to the database system to achieve non-contact two-way communication, thus achieving the purpose of identification. For data exchange, an extremely complex system is connected in series. In the identification system, the reading and writing and communication of electronic tags are realized through electromagnetic waves. According to the communication distance, it can be divided into near-field and far-field. For this reason, the data exchange mode between the read/write device and the electronic tag is correspondingly divided into load modulation and backscatter modulation.

4. NFC (Near Field Communication, Near Field Communication)

NFC is an emerging technology. Devices (such as mobile phones) that use NFC technology can exchange data when they are close to each other. It is evolved from the integration of non-contact radio frequency identification (RFID) and interconnection technology. By integrating the functions of inductive card reader, inductive card and point-to-point communication on a single chip, the use of mobile terminals to realize mobile payment and electronic ticketing , Access control, mobile identification, anti-counterfeiting and other applications.

5, 6LoWPAN (IPv6 over low-power personal area networks)

6LoWPAN is a low-speed wireless personal area network standard, which implements IPv6 communication based on IEEE 802.15.4. The advantage of 6LoWPAN lies in its low-power support, which can be applied to almost all devices, including handheld devices and communication devices; it has a built-in AES-128 encryption standard and supports enhanced authentication and security mechanisms.

6, LoRA (Long Range Radio, long-distance radio)

The name of LoRa is Long Range Radio (Long Range Radio), as a modulation technique of chirp spread spectrum. LoRa is a physical layer or wireless modulation that creates a long-distance communication connection. Compared with traditional FSK technology and short-distance radio frequency technology with insufficient stability and security, LoRa is based on CSS modulation technology (Chirp Spread Spectrum) to maintain low power consumption. At the same time, the communication range has been greatly increased, and CSS technology has been widely used in space communication for decades, and has the characteristics of long transmission distance and strong anti-interference.

In addition, LoRa technology does not need to build a base station, a gateway can control more devices, and the network layout is more flexible, which can greatly reduce the construction cost.

7. SMS (Short Message Service, short message service)

Short message service is a store and forward service. In other words, short messages are not sent directly from the sender to the receiver, but are always forwarded through the SMS service center. If the recipient is not connected (maybe the phone is turned off), the message will be sent when the recipient connects again.

8, IPv6 (Internet Protocol Version 6)

IPv6 is the next generation IP protocol designed by the IETF (Internet Engineering Task Force) to replace the IP protocol (IPv4). The use of IPv6 not only solves the network address The problem of the number of resources, but also solves the obstacles of multiple access devices to access the Internet.

The above are the common terms used in this issue of the Internet of Things compiled by the editor, we will see you next time.

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