With the rapid development of wireless technology for Internet of Things applications, NB-IoT modules, LoRa modules, zigbee modules, WiFi modules, SigFox and other wireless communication technology terms appear in our field of vision from time to time. Said, can be confused in front of a large number of nouns. This paper will make a detailed introduction and comparison of LoRa wireless technology and LoRaWAN communication protocol.modbus tcp gateway Generally speaking, LoRa only includes link layer protocol, and it is very suitable for P2P communication between nodes; at the same time, LoRa module is also a little cheaper than LoRaWAN module.
The LoRaWAN protocol also includes a network layer, so information can be sent to any base station connected to the cloud platform. The LoRaWAN module can work at different frequencies simply by connecting the correct antenna to its socket.
Although LoRa wireless technology is often misused to describe the entire LPWAN communication system, strictly speaking, LoRa wireless technology is a proprietary modulation format owned by Semtech. The SX1272 and SX1276 RF LoRa chips use a modulation technique called chirp spread spectrum (CSS) to make up the physical layer (PHY) of the technology stack.
The LoRa protocol has two different protocol stacks: LoRaWAN and Symphony Link. Symphony Link is for industrial and enterprise users who require advanced functionality. LoRaWAN is suitable for mobile networks based on the LoRaWAN protocol and is developing relatively fast in Europe.
Low-power wide-area networks (LPWANs) are expected to support the billions of devices predicted by the Internet of Things, and are composed of many components in the overall system. The physical (PHY) layer defines the electrical specifications for data transmission at the hardware level. The data link layer is responsible for detecting changes in the PHY layer and establishing a protocol for sending data.
The LoRaWAN protocol is an open standard that defines a communication protocol for LPWAN technology based on LoRa chips. The LoRaWAN protocol defines Media Access Control (MAC) at the data link layer and is maintained by the LoRa Alliance. rs485 ethernet adapter This distinction between LoRa and LoRaWAN is important because other companies, such as Link Labs, use a proprietary MAC layer on top of LoRa chips to create a better hybrid design — called Symphony Link in Link Labs’ case.
As mentioned above, the LoRaWAN Agnostic Module is a Media Access Control (MAC) layer protocol designed for large public networks with a single operator.
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