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C&T RF Antennas Inc
What’s LoRa?
Source:Original | Author:C&T RF Antennas Inc | Publish time: 2018-11-08 | 387 Views | Share:


LoRa Introduction There are several wireless technologies in the Internet of Things applications that can form a local area network or a wide area network. The main wireless technology to form a LAN 2.4GHz WiFi, Bluetooth, Zigbee, etc., composed of wide area network wireless technology mainly 2G / 3G / 4G and so on. These wireless technologies, the advantages, and disadvantages are very obvious, can be summarized as shown below. Before the Low Power Wide Area Network (LPWAN) generation, it seems that there is only one choice between the long distance and the low power consumption. When using LPWAN technology, designers can do both, to achieve maximum distance communications and lower power consumption, while also saving additional repeater costs.

 

LoRa is one of the LPWAN communication technologies and is an ultra-long distance wireless transmission scheme based on spread spectrum technology adopted and promoted by Semtech. This scheme has changed the previous trade-offs about transmission distance and power consumption, providing users with a simple system that can realize long-distance, long battery life, and large capacity, and then expand the sensor network. At present, LoRa mainly in the global free band operation, including 433,868,915 MHz and so on.

LoRa technology has long-range, low power (long battery life), multi-node, low-cost features.

The following is a case of USA, from the sensitivity, link budget, coverage, transmission rate, send current, standby current, receive current, 2000mAh battery life, positioning, anti-jamming, topology, maximum number of terminal connections Compared the differences between Sigfox, LTE-M, ZigBee, WLAN, 802.11ah, and LoRa. Subsequent LoRa technology small science (below) will explain some of the above parameters.

LoRa network composition

LoRa network mainly by the terminal (built-in LoRa module), gateway (or base station), Server and cloud four parts. Application data can be bi-directional.

 

LoRa Alliance The LoRa Alliance is an open, nonprofit organization led by Semtech in March 2015, with members such as Activity in France, AUGTEK in China and Kpn in the Netherlands. Less than a year, the Union has developed more than 150 member companies, many of which IBM, Cisco, France Orange and other heavyweight manufacturers. Each chain in the industry chain (terminal hardware manufacturer, chip maker, module gateway manufacturer, software vendor, system integrator, network operator) has a large number of enterprises, the openness, competition, and cooperation of this technology Adequacy have contributed to the rapid development of LoRa and ecological prosperity.