Monday, December 5, 2022

A summary of the characteristics of 5 wireless transmission protocols

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    Various types of wireless communication technologies support devices to realize data communication between devices or between devices and serial servers without cable connection, all of which are carried out under various protocol conditions. There are many different types of wireless communication technologies that are widely used in hardware products in the field of Internet of Things (IoT) and device-to-device (M2M) communication. IEEE has seven 802.15 technical task groups (standards). These 802.15 task groups include: WPAN/Bluetooth, Coexistence (network coexistence), high-rate WPAN, low-rate WPAN, mesh networking, local area network, and visible light communication. Each of these wireless transmission protocols has its unique advantages and limitations.

    Internet of things transmission protocol application

    LoRa wireless technology transmission protocol

    LoRa is the abbreviation of Long Range (Long Range), which belongs to one of the wireless communication technologies, and the transmission rate is relatively low. The LoRa module wireless technology has the characteristics of long distance, low power consumption, low cost, and multi-node.

    The LoRaWAN protocol is a set of transmission protocol standards based on the physical layer transmission of LoRa and mainly based on the data link layer. It corresponds to the MAC layer in the OSI seven-layer model. LoRaWAN eliminates the incompatibility of specific hardware and also has Features such as multi-channel access, frequency switching, adaptive rate, channel management, timing sending and receiving, node access authentication and data encryption, and roaming.

    NB-IOT narrowband transmission protocol

    Nbiot narrowband transmission protocol is based on cellular narrowband Internet of Things (Narrow Band Internet of Things, NB-IoT) technology has become an important branch of the Internet of Things network. The NB-IoT module is based on the cellular network, only consumes about 180KHz of bandwidth, and can be directly deployed on GSM, UMTS and LTE networks to reduce deployment costs and achieve smooth upgrade functions.

    IEEE 802.15.4: ZigBee protocol

    ZigBee technology is an open global standard wireless transmission protocol, which is specially designed for M2M network. This technology not only has low cost and low power consumption, but also has the characteristics of low delay and low duty cycle, which allows the product to maximize the life of its power supply battery, and is an ideal technical solution for many industrial technologies. In addition, the ZigBee module protocol provides 128-bit AES encryption, which supports Mesh ad hoc networks, and allows network nodes to be connected together through wireless transmission through multiple paths.

    The most commonly used IoT application scenario for ZigBee modules is smart homes in the field of wireless transmission. This technology can connect multiple devices together at the same time, making it an ideal choice for home network environments. Users can realize mutual communication between devices such as smart locks, lights, robots and thermostats, and add controllers for real-time control. Wait.

    IEEE 802.11: WiFi module communication protocol

    The WiFi module is a wireless module that uses radio waves (RF) to realize mutual communication between two devices. This technology is often used to connect devices such as computers, tablets, and mobile phones to routers to achieve the purpose of surfing the Internet. In fact, it can also be widely used for connection between any two hardware devices.

    IEEE 802.15.1: Bluetooth module and BLE transmission protocol

    Bluetooth modules and Bluetooth Low Energy (BLE) wireless transmission are wireless technologies used to transmit data over short distances. It is often used to connect small smart devices such as mobile phones, tablets, and laptops, such as various voice systems. Bluetooth low energy modules (BLE) have less power than standard Bluetooth modules and are often used in IoT applications for fitness bracelets, smart watches, or other wearable small hardware devices.

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