The Era of Internet of Things by Khaled Salah Mohamed

Author:Khaled Salah Mohamed
Language: eng
Format: epub
ISBN: 9783030181338
Publisher: Springer International Publishing

4.3.3 Sigfox: WiMAX for IoT

An alternative wide-range technology is Sigfox , which in terms of range comes between WiFi and cellular. It uses the ISM bands, which are free to use without the need to acquire licenses, to transmit data over a very narrow spectrum to and from connected objects. The idea for Sigfox is that for many M2M applications that run on a small battery and only require low levels of data transfer, then WiFi’s range is too short while cellular is too expensive and also consumes too much power. Sigfox uses a technology called Ultra Narrow Band (UNB) and is only designed to handle low data-transfer speeds of 10 to 1000 bits per second. It consumes only 50 microwatts compared to 5000 microwatts for cellular communication, or can deliver a typical stand-by time 20 years with a 2.5 Ah battery while it is only 0.2 years for cellular [81].

Already deployed in tens of thousands of connected objects, the network is currently being rolled out in major cities across Europe, including ten cities in the UK for example. The network offers a robust, power-efficient and scalable network that can communicate with millions of battery-operated devices across areas of several square kilometers, making it suitable for various M2M applications that are expected to include smart meters, patient monitors, security devices, street lighting, and environmental sensors. The Sigfox system uses silicon such as the EZRadioPro wireless transceivers from Silicon Labs, which deliver industry-leading wireless performance, extended range, and ultra-low power consumption for wireless networking applications operating in the sub-1GHz band.

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