5G NTN » History » Version 1
laforge, 07/12/2023 09:10 AM
| 1 | 1 | laforge | h1. 5G NTN |
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| 3 | In 3GPP release 17, the so-called _non-terrestrial networks_ were introduced. NTN is a generic term that encompasses satellites (GEO, LEO) as well as high-altitude vehicles. |
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| 5 | h2. Frequencies |
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| 7 | The two initial frequency band groups specified by 5G NTN are called FR1 and FR2. |
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| 9 | h3. 5G NTN FR1 |
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| 11 | There are two specified 5G NR bands in NTN FR1: n255 (L-Band) and n256 (S-Band). |
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| 13 | |_.Band|_.Common name|_.Uplink|_.Downlink|_.Duplex spacing| |
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| 14 | |n255|L-Band|1626.5-1660.5|1525-1559|-101.5| |
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| 15 | |n256|S-Band|1980-2010|2170-2200|190| |
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| 18 | h2. Deployed networks |
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| 20 | h3. Bullitt |
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| 22 | One of the first commercial 5G NTN deployments appears to be "Bullitt Sattelite":https://bullitt.com/en-gb/coverage/ who are apparently renting transponder capacity on existing Echostar (S-Band, Europe) and Inmarsat (L-Band) GEO sattelites. Given that those (Like Echostar XXI) are in orbit for many years, they presumably are just traditional "bent pipe" sattelites. |
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| 24 | Echostar also appears to be in the process of setting up a separate 28-LEO-sattelite constellation just for NTN, where the actual gNB (or at least part of it) is in the sattelite itself. That's not deployed as of now (2023). |
