Mioty (pronounced “My IoT”) is targeting a wide range of potential application spaces for its low power wide area network (LPWAN) technology. In several cases, it’s intending to supplement or even supplant existing protocols such as WiFi and LoRa, even Ethernet. Mioty is a standardized software-based massive IoT connectivity solution operating in the license-free spectrum. A single mioty gateway can handle up to 100,000 sensor nodes and about 1.5 million messages per day with interference immunity and transmits data with ultra-low power consumption.
Mioty is based on the protocol family telegram splitting ultra narrowband (TS-UNB) of the ETSI TS 103 357 standard. These TSMA systems have a data rate of 512 bit/s. The UNB telegram is divided at the physical layer into multiple equal-sized sub-packets. Each of them is randomly sent on a different carrier frequency and at a different time.
The risk of suffering data loss resulting from interference is substantially reduced due to a combination of the virtually random distribution of sub-packet transmissions through time and varying frequencies. And, as a result of the use of sophisticated forward error correction (FEC) techniques, the receiver needs only about 50% of the packets to reconstruct the original telegram completely.
As a consequence, the result is a much lower impact of corrupted or lost packets (and therefore, the whole telegram), due to collisions and greatly increased immunity to interfering than traditional LPWAN technologies.
Packet error rates (PER) over 10% are not unusual with traditional LPWAN solutions. With mioty PER are typically under 1%. Mioty uses 100kHz to 1.5MHz in the worldwide license-free spectrum.
ETSI TSMA overview.
The ETSI TS 103 357 UNB family uses a star topology. No network synchronization is needed. The end-point starts communications at any time data is available. The technology is specially designed with battery- or energy harvesting-powered endpoints in mind.
The ETSI TS-UNB family of protocols can handle variable application data with up to 245 bytes in the uplink and 250 bytes in the downlink. It is optimized for a data length of 10 bytes. AES128 encryption is used. A 32-bit cipher-based message authentication code (CMAC) is added to the MAC protocol data unit for authentication and integrity checking, and a 24-bit packet counter is used for replay protection. Finally, user-specified MAC functions can be implemented with an optional variable MAC mode.
Mioty implementation of ETSI TSMA.
Mioty is a specific, patented implementation of ETSI TS-UNB telegram splitting. It is designed to minimize PERs, even in the crowded spectrum, and maximize the throughput of short messages. It is specifically designed for devices such as sensors that do not require high bandwidth or constant communications. The protocol, combined with battery recovery periods, can enable the use of smaller batteries. Battery life of 20 years or more can be achieved given mioty’s power consumption of 17.8 μWh (end-point, 868 MHz) per message.
Additional features of mioty include:
Moity can collect data from sensors moving up to 120 kph, enabling fleet management applications and various connector worker scenarios.
Mioty networks are private and do not rely upon paid subscription services or monthly license fees. Private gateways are used for connectivity in the mioty star network architecture.
Mioty operates without interference, and a single network can have hundreds of thousands of devices, potentially over one million devices, transmitting up to 1.5 million telegrams per day. Networks can start small and grow in size over time. The robustness of mioty supports nodes in hard-to-reach areas with poor propagation properties and physical obstacles.
Long-range on license-free frequencies.
Mioty can support transmissions of a 20km line of sight, and with the use of strategically placed gateways, large environments such as industrial complexes and factories, mining, oil fields, and large agricultural operations can be covered.
Mioty is structured to deliver near the carrier-grade quality of service (QoS), reliability, and robustness in challenging environments with high levels of interference in congested license-free segments of the spectrum. It is especially suited for industrial environments with metal or rebar obstructions and can support deep indoor connectivity.