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On-demand webinar: The impact and opportunities of space-based 5G NB-IoT

Watch or revisit the webinar for a discussion about space-based 5G NB-IoT.

The webinar is a panel discussion between:

  • Petar Popovski: Professor and Head of Section on Connectivity at Aalborg University
  • Stefano Cioni: Telecommunication Systems Engineer at ESA – European Space Agency
  • Per Koch: Business Development Manager at GateHouse SatCom

In the webinar, you will learn about:

  • Why NB-IoT/LTE-M as technologies are strong candidates for satellite-based IoT
  • Standardization and how this impacts the space (satellite) industry
  • Use cases and market

Q&As from the webinar

Q&As regarding antenna, link budget, frequency, and TN/NTN chipsets
What kind of antenna is required for NTN NB-IoT?

It is desirable and possible to use the same kind of omni-directional antennas which are used in terrestrial. To compensate for the low device antenna gain, the satellite must be equipped with a directional antenna with a higher gain. It will still be beneficial and possible for some devices to use a higher gain antenna to obtain a better link-budget.


What link budget is anticipated for NTN NB-IoT?

There will often be direct line-of-sight between satellite and device but the Free-Space-Path-Loss for NTN NB-IoT is higher, due to a longer distance. The link budget is calculated separately for up- and downlink. Uplink is favored by the use of single-tone transmission which theoretically adds up to 17 dB gain. Antennas on GEO satellites typically have a large gain (around 50 dBi) while the gain is less for LEO satellites. This results in LEO and GEO link budgets with comparable dB ranges. Calculation on a smallsat LEO case indicates that SNR range for downlink is -5 to 0 dB while for uplink it is -2 to 3 dB (depending on elevation angle and distance between the device and satellite).


In what frequencies does NTN NB-IoT operate?

Even though current operational satellite frequency bands can be used, from 3GPP directive, the S-band (2-4 GHz) is set as exemplary band.


What kind of chipsets are expected for a TN/NTN dual NB-IoT operation?

Common chipsets can be used to support multiple access technologies, as well  as to control carriers on multiple frequencies. For LEO satellites, the chipsets will need to be able to control the timing and frequency drifting, caused by the varying time delay and Doppler due to the motion of the satellite.


Q&As regarding Doppler effect, latency, and handover
How is Doppler effect handled with NB-Iot and non-stationary satellites?

Since LEO (and MEO) satellites are moving around Earth at very high speeds (can be as fast as 28,000 K/hour), transmission signals are influenced by the Doppler effect. Mathematical algorithms are helping to reconstruct the transmission signalling by taking in account the (moving) positions of the satellite and device. For this GNSS position information of the satellite will be transmitted within System Information Broadcast messages. The location of the device can either be fixed configured or retrieved via an embedded GNSS module. By doing this, the original signal can be recovered, and the uplink transmission can be pre-compensated at the device side.


What latency level is anticipated with GEO and LEO satellites?

With GEO satellites positioned stationary at 36,000 K from Earth propagation delays up to 541 ms will occur. Comparably for a scenario with a LEO satellite on 600 K distance, this will vary between 4-26 ms depending on position of the satellite in relation to the device for regenerative systems. For transparent systems, as focused on in 3GPP Rel-17, the LEO propagation delay is doubled (8-52 ms).


Will there be a seamless satellite handover in a LEO or GEO scenario?

Devices can stay connected (long) to the same GEO satellite, since the satellite is stationary. LEO satellites are moving in relation to the Earth, and devices will need to continue reselecting to different satellites (or will experience connection gaps). As NB-IoT currently does not support Handover procedures, a message transfer will need to finish during the pass of a single satellite.


We hope you found the webinar inspirational

Stefano Cioni

Telecommunication Systems Engineer
ESA – European Space Agency

Petar Popovski

Professor and Head of Section on Connectivity, Aalborg University

Per Koch

Business Development Manager
GateHouse SatCom

Please get in touch with us at gh@gatehouse.com if you have any questions or inquiries. 

Why work with GateHouse?

Easy enabling of satellite networks

Let us help you enable your space IoT dreams. GateHouse excels in developing protocol software that enables a seamless satellite connectivity even in desolate areas of the world. Our IoT end-to-end solutions fit available chipsets and SDR payload HW.

Gain a competitive advantage

Save money and improve your business case. Normally, it takes years and cost a lot to develop a reliable and advanced protocol stack for a 24/7 working IoT/M2M service in space. By using an already proven solution, you can focus on your business and serving your clients instead of dealing with technical difficulties. This will give you a competitive advantage.

Fast time to market and reduced risks

Shorten your time to market and reduce risk. With a satellite IoT solution from GateHouse, you get already proven software which reduces risks and ensures fast time-to-market.

Satellite IoT technologies from GateHouse

5G

5G NB-IoT NTN

GateHouse provides a standardized 5G NB-IoT NTN solution.

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IoT/M2M Solutions

We supply satellite IoT solutions for your specific needs.

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partnerships

3GPP & ETSI

We are member of the 3GPP and ETSI standardization organizations.

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NB-IoT market info

GateHouse follows the NB-IoT market development closely.

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connectivity

Thank you

Thank you for your time. Please don’t hesitate to reach out if you have questions or inquiries.

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