{"id":7142,"date":"2022-07-12T14:58:21","date_gmt":"2022-07-12T06:58:21","guid":{"rendered":"https:\/\/store.west-hn.com\/?p=7142"},"modified":"2022-07-26T16:47:07","modified_gmt":"2022-07-26T08:47:07","slug":"iot-communication-technology-lora","status":"publish","type":"post","link":"https:\/\/store.west-hn.com\/en\/iot-communication-technology-lora\/","title":{"rendered":"[IoT Communication Technology] - LoRa"},"content":{"rendered":"

summarize<\/h2>

Low Power Wide Area Network (LPWAN) is an integral part of the Internet of Things (IoT), featuring low power consumption, wide coverage, and strong penetration, and is suitable for application situations where a small amount of data is sent and received every few minutes, such as smart water metering, street light monitoring, smart parking andintelligent firefighting (psychology)<\/a>Wait a minute, Chinese carriers are pushingNB-IoT<\/a>technology, LoRa technology,SigFox<\/a>technology, eMTC technology all belong to the technology of wide area network. Among them, eMTC and NB-IoT are carrier-licensed bands; the bands for LoRa and SigFox technologies belong to unlicensed bands<\/p>

LoRa is based onSemtech<\/a>A low power consumption LAN developed by the companywireless standard<\/a>, which aims to solve the contradictory problem of power consumption and transmission difficult to cover the distance. In general, low power consumption is close to the transmission distance, high power consumption is far from the transmission distance, through the development of LoRa technology, to solve the technical problems in the same power consumption conditions than other wireless methods to spread the distance, to achieve the unity of the low power consumption and long distance.LoRa from a small wireless technology to the current Internet of Things field communication of a kind of standard, every year with a double-digit terminal growth rate to get industry Its low power consumption, long-distance transmission and more node capacity make LoRa come into more and more use scenarios.<\/p>

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Image fromSemtech<\/a>official website<\/figcaption><\/figure>

LoRa adopts a star network, users can realize flexible networking through mesh, point-to-point or star network protocols and architecture; LoRa physical layer wireless modulation technology, belongs to the linear modulation spread spectrum technology (Chirp Spread Spectrum, CSS), also known as broadband linear frequency modulation (Chirp Modulation) technology. A technology that trades bandwidth for sensitivity, maximizing sensitivity allows signals to travel farther, which is the basis for the technology's rapid growth.In 2019, users in Spain used LoRa technology to transmit signals in a hot air balloon for over700 kilometers.<\/a>The<\/p>

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Image from LoRa Developer Portal<\/figcaption><\/figure>

There are foreign companies installing LoRa to near-Earth satellites (600km-1600km) and receiving relevant signals from the satellites<\/p>

LoRa History<\/h2>

LoRa is an abbreviation for Long Range, which means long distance transmission. The basic explanation is similar to the commonly used FSK or QAM and other frequency modulation technology, is a linear frequency modulation and spreading of the physical layer of the modulation technology, the broader meaning is a similar to thebluetooth<\/a>(math.) genusWIFI<\/a>and interface systems and protocols for communication such as NB-IoT.<\/p>

French startup Cycleo first developed a linear FM spread spectrum modulation technology, in 2012 Semetech acquired Cycleo; this technology was applied to the chip, and named LoRa; after that Semetech developed a complete set of chips based on LoRa technology, including gateways (1301 series) and terminals (126 series, 128 series) to be used Semetech has also developed a complete set of chips for gateways (1301 series) and terminals (126 series, 128 series) based on LoRa technology.<\/p>

In 2015 Semetech joined forces with Cisco, IBM and a number of vendors to create the LoRa Alliance and then launched the LoRaWAN specification, which now has more than 500 members globally (Tencent, Alibaba, Intel, etc.), more than 100 telecom carriers (carriers in South Korea, Japan, and Europe), and more than 100 million endpoints are already being set up and used<\/p>

LoRa technology features<\/h2>