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Mioty

Mioty, the name is derived from "My Internet of Things", is a protected brand name for a Low Power WAN (LPWAN). It was developed by the Fraunhofer Institute and specified as an ETSI standard. The LPWAN Mioty targets Industrie 4.0 and the related Internet of Things (IoT) and Industrial Internet of Things

(IIoT). Mioty is extremely robust because the Mioty protocol uses convolutional codes and a code rate of 1/3 to transmit the data. Telegram splitting, in which the signals from the sensors are divided into several small sub-packets and transmitted at different frequencies

with a time delay, also contributes to the robustness. Telegram splitting also helps to increase efficiency, and thelow-cost nodes can be used to transmit data

fromaround 1 million sensors over distances of 15 km with just one receiver. Like most LPWANs - LoRaWAN, Sigfox or NB-IoT - Mioty uses frequencies in the license-free sub-gigahertz range at 868 MHz for radio transmission. Due to the moderate data transmission rate and especially due to an asymmetric transmission method, the transmission power of the Mioty nodes is only a few milliwatts, which gives the Mioty sensor network good energy efficiency and long battery runtimes

. Thelatter is based on the short transmission time and the way batteries

are loaded, and may well be 20 years.Mioty's transmission technique

differs from other LPWAN radio techniques in that Mioty uses a method called Telegram SplittingUltra Narrow Band (TS-UNB), which has been standardized by ETSI. In the TS-UNB method, the data packets and divided into several small sub-packets, identified with pilot sequences and transmitted in frequency hopping. A forward error correction is applied to the data beforehand. The demodulation is a synchronous demodulation based on the phase of the pilot signals. As for the modulation methods, the signals are modulated using either MSK modulation, Minimum Shift Keying (MSK), or GMSK modulation

, Gaussian Minimum Shift Keying (GMSK). Theaccess method is called Telegram Splitting Multiple Access (TSMA) and offers high transmission reliability and good scalability of

the transmission channels.Transmission takes place in short time slots

of15 ms, in which 24 data bits and 12 pilot bits are transmitted in each case

.

If data packets are lost during data transmission or are not transmitted completely, they can be reconstructed via forward error correction.

Mioty can be used in industrial plants, as well as in smart grids, smart homes, smart cities and in many other public areas where sensors are used to detect temperature, humidity, light, pressure and other physical variables.

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Englisch: Mioty
Updated at: 07.12.2020
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Translations: DE