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Top Posts of 2022

It's that time of the year again when we look back to see which posts did well and which didn't. Here are the top 3 posts from this year.

  1. Laser Inter-Satellite Links (LISLs) in a Starlink Constellation, Feb 2022
  2. Almost everything you need to know about Wi-Fi 7 (IEEE 802.11be), Feb 2022
  3. GSMA's DIG discusses how 5G Networks will handle UAV Layer, June 2022

Since this blog is just over three years old, the most popular posts are not necessarily from 2022. Here are the 5 most viewed posts this year.

  1. Laser Inter-Satellite Links (LISLs) in a Starlink Constellation, Feb 2022
  2. CSI-RS vs SRS Beamforming, Mar 2021
  3. IEEE 802.11be Extremely High Throughput (EHT), a.k.a. Wi-Fi 7, Nov 2020
  4. High-level Architecture Introduction of Mobile Cellular Networks from 2G to 5G, Aug 2019
  5. Fibre-to-the-room (FTTR / FTTRoom), July 2021

Do you have a favourite post on this blog? Please let us know.

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Laser Inter-Satellite Links (LISLs) in a Starlink Constellation

When we first talked about Starlink back in 2019 , we saw in the video that the concept involved laser communication to communicate between the satellites. While the initially launched satellites did not have the laser communication mechanism built in, it looks like they are being added to the newer ones.  A report from Fast Company in late 2021 said: One of the next big upgrades in telecom will involve satellites firing lasers at each other—to beam data, not blow stuff up. The upside of replacing traditional radio-frequency communication with lasers, that encode data as pulses of light, can be much like that of deploying fiber-optic cable for terrestrial broadband: much faster speeds and much lower latency. “Laser links in orbit can reduce long-distance latency by as much as 50%, due to higher speed of light in vacuum & shorter path than undersea fiber,” SpaceX founder Elon Musk tweeted in July about the upgrade now beginning for that firm’s Starlink satellite constellation. ...
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IEEE 802.11bn Ultra High Reliability (UHR), a.k.a. Wi-Fi 8

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NTT Docomo's Disaster Countermeasures to Keep People Connected

Recently I blogged about Disaster Roaming in 3GPP Release-17. While this will take time to be implemented worldwide, it is already available in Japan, maybe not in the 3GPP standardised way. Similarly, back in 2011, I blogged about Earthquake and Tsunami Warning service (ETWS) from NTT Docomo's Journal, it was two days before the  2011 Tōhoku earthquake and tsunami hit. Japan is no stranger to earthquakes, typhoons, and other natural disasters, which can have a devastating effect on infrastructure. To ensure that the mobile networks keep functioning, operators work extremely hard to ensure people remain connected one way or another. NTT Docomo has released a video detailing the countermeasures to keep everyone connected in case of emergencies. The following detail is provided with the video: DOCOMO's network is no exception, and our services could get cut off by a base station power outage, disconnected fiber-optic cable, or other malfunctions. DOCOMO established the three p...
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