Wireless

Satellites Directly to Cellphones

AT&T and satellite company AST SpaceMobile announced a partnership to provide satellite cellular service directly from satellites to cellphones. This will provide a service that is much needed for the billions of remote users who are not in the range of a cell tower. This is an emerging industry that is still being referred to by different acronyms.

Solar Storms Threaten Broadband and Power Grids: Understanding the Impacts and Preparations

Many readers will have seen recent news that the aurora borealis, or northern lights, were visible deep into the South for several days. This phenomenon is caused by a geomagnetic storm that is caused by strong solar flares. Solar flares can cause problems on Earth by emitting clouds of magnetized particles and hot plasma.

A Transport Protocol’s Perspective on Optimizing Starlink Performance

Digital communications systems always represent a collection of design trade-offs. Maximizing one characteristic of a system may impair others, and various communications services may choose to optimize different performance parameters based on the intersection of these design decisions with the physical characteristics of the communications medium.

Starlink Service Is Great on (Some) Cruise Ships

I recently used Starlink on a cruise along the coast of Northwest Africa, and I'll summarize my experience below, but first let me explain why I put some in the title of this post. I posted the following request on the Reddit Cruise group: "What has been your experience of Starlink Internet service on Seabourn or other cruise lines? How was latency? Do video chats work smoothly? Games? etc."

The Rise of WiFi Sensing and Its Implications for Home Security and Surveillance

It's incredibly hard to keep things private in the new digital age. There are far too many stories circulating about people who talked to a friend on the phone or texted about something and almost instantly got hit with ads for the subject of the conversation. And that happens without malware - no telling what information you're giving out if your devices have been infected with malicious software that is spying on you.

Another G Generation: The Promise of 5.5G

I've read several articles coming out of the Mobile World Congress trade show in Barcelona, Spain, and one of the common threads is that there was a lot of talk about 5.5G (or 5G Advanced) - the next iteration of 5G. My first question on reading about this was to ask what new features are being discussed that were not part of the original announced promises of 5G. I went back and read a few of my blogs and other articles that were written when 5G was first announced.

Starlink Has Begun Delivering Promised Latency Cuts

In his January 12 SpaceX update, Elon Musk said the biggest goal for Starlink from a technical standpoint is to get the mean latency below 20 ms. He expanded by saying that given the speed of light, 8 ms is the absolute minimum latency for a satellite at 550 km. He believes they can optimize terrestrial and inter-satellite links, and minimize queueing delays and dropped packets, to recude the the rest of the time to below 10 ms.

Civilian Tech Mobilization in Ukraine

As was the case in the US during World War II, civilian volunteers are making important contributions to the Ukrainian war effort. On February 8, 2022, the first truckload of Starlink terminals arrived in Kyiv. A week later they were being used. By April 2022, there were 5,000 terminals in Ukraine, and 42,000 as of April 2023. (At this point, SpaceX and Ukraine have gone silent. Neither ChatGPT4, Gemini, Copilot, Perplexity, nor I could not find a current terminal count).

A Brief Primer on Anti-Satellite Warfare Tactics

Satellites make it possible for governments to provide essential services, such as national defense, navigation, and weather forecasting. Private ventures use satellites to offer highly desired services that include video program distribution, telecommunications, and Internet access. The Russian launch of a satellite, with nuclear power and the likely ability to disable satellites, underscores how satellites are quite vulnerable to both natural and manmade ruin.

Lies, Damn Lies, and Selective Statistics About Our Great Wireless Marketplace Thanks to the T-Mobile

In the February 13th edition of the Wall Street Journal, Professor Thomas W. Hazlett offers a breathless endorsement of market concentration with the T-Mobile acquisition of Sprint, his go-to example. Apparently, mergers and acquisitions benefit consumers because they enhance competition and generate all sorts of positive outcomes that could not possibly have occurred but for the reduction in the number of industry players.