IoT M2M blog

The home of free hints and tips about wireless IoT / M2M

IoT-University

NB-IoT troughput – table

NB-IoT troughout - table

NB-IoT has a very high throughput at the top end. At the lower end it is faster than other LPWA techniques. At LoRaWAN, Weightless and NB-IoT the distance and the data throughput also regulate the speed. In this lecture we will only consider NB-IoT due to the limited talk time. At first glance, the table […]

LPWAN antenna designs, testing and consulting – NB-IoT, LTE-M, LTE, GSM, GPS, LoRa, SIGFOX

Antenna reference customers 1

Slide 7, 8 and 9 from our lecture “Self Made Embedded Antenna Design versus Chip Antenna” The following applications are representative of those adopted by many of our satisfied customers. We are not yet authorized to show some of them, but we will reveal more details in due course, and many applications will become public […]

Unlicensed like Icarus flying to the sun or licensed like Charon in the underground

LPWAN - flying to the sun

Icarus wanted to go high up unlicensed. If you don’t follow the rules like Icarus, then the fall comes after the flight. Icarus melted the wings. Why do the unlicensed LPWA companies of all firms repeatedly report hot-air balloons or weather balloons with extreme ranges and fly towards the sky and the sun? Up there […]

Comparison of TX energy consumption across LPWAN in EU 12 bytes on NB-IoT, LoRaWAN, SIGFOX and GSM/SMS)

Energy / power consumption SMS versus NB-IoT, LoRaWAN and SIGFOX

After comparing NB-IoT, LoRaWAN and SIGFOX’s energy consumptions during transmission in the USA and Europe, here is another direct comparison with GSM and SMS. SIGFOX and LoRaWAN repeatedly call out their low energy consumption when compared to SMS with wake-up and registration on the GSM network. Their commentary is that the two unlicensed LPWAN technologies […]

Comparison of TX energy consumption across LPWAN in US (12 bytes on NB-IoT, LoRaWAN, SIGFOX))

LPWAN link budget - NB-IoT, LoRaWAN, SIGFOX

The physics in US is the same than in Europe. The energy consumption of a radio transmitter is computed by multiplying the power output with time. LPWAN in the unlicend band in the US  has not to follow a duty cycle but a maximum time of 400 ms per data package plus frequency happing. The […]

Comparison of TX energy consumption across LPWAN in EU (12 bytes on SIGFOX, LoRaWAN, NB-IoT)

Comparision energy ( power) consumption LPWAN -Comparision Energy ( power) consumption @ TX LPWAN - NB-IoT, LoRaWAN, SIGFOX

The energy consumption of a radio transmitter is computed by multiplying the power output with time. The graph clearly shows the envelope of various LPWA transmitters in Europe over time. In Europe SIGFOX and LoRaWAN are limited to 14 dBm TX power. SIGFOX and NB-IoT are along the right scale of time axis. However, in […]

Superficial knowledge in NB-IoT

NB-IoT knowledge

Unfortunately, it is a regular occurrence that people in marketing departments without technical expertise constantly recycle the same rumours and “news” about NB-IoT. Most of these “professionals” have never been inside a technical university and probably did not pass a basic course in physics at elementary school. These same people probably did not choose the […]

NB-IoT versus SIGFOX, LoRaWAN, and Weightless – power / energy the inconvenient truth

NB-IoT power consumption

Please note that I will add further modules later and that, on request, different parameters can be used in the calculation. The data in the graphic is real and was generated for a report published by a German university for a large metering customer. The report was presented during an NB-IoT seminar September 2017 with […]

Clever SW stack on LoRa modules in Lower Saxony – Germany

LoRa PCBs

The LoRaWAN software stack is based on plain Aloha. Plain Aloha is a model that describes the typical package loss due to collisions of uplink transmissions in an unsynchronised communication system. With a LoRaWAN system, the model shows 82% package loss at maximum throughput. On top of this we get additional package loss during LoRaWAN […]

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