Technologies

AT&T Is Using an Advanced Video Game Feature to Improve Your Phone Coverage

«Whatever Nvidia is doing for games, whatever Disney is doing … we are doing at a much bigger scale,» said AT&T’s Velin Kounev about using ray tracing to improve its network.

When you think of cellular networks, you probably envision radio towers and invisible data streams. But AT&T, by necessity, needs to see everything in between: buildings, trees and the multitude of obstacles that can interfere with wireless signals getting to your phone.

The cellular provider is turning to a key technology from gaming and computer graphics to get an accurate picture. AT&T Wireless Geo Modeler is a new system that uses ray tracing and AI to generate detailed representations of the areas covered by its network and improve connectivity. In doing so, AT&T says it can react to service interruptions quickly and also better predict how its network can be configured in response to large social events or during natural disasters.

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How ray tracing works in a cellular context

In computer graphics, ray tracing is a technique for rendering three-dimensional scenes. Software simulates light beams emanating from a virtual camera and calculates how the light affects objects and materials in the scene. Ray tracing is notable for rendering shadows and reflections, leading to more realistic-looking environments.

In the past, ray tracing was computationally challenging. Early examples, such as the original Toy Story movie, required rooms full of processing hardware and up to 24 hours to render a single frame of footage. The graphics processor in high-end smartphones can now render photorealistic, ray-traced scenes in games in real time.

According to Velin Kounev, lead inventive scientist at AT&T Labs, the technology’s cellular application works the same way. «Whatever Nvidia is doing for games, whatever Disney is doing… we are doing at a much bigger scale,» he said.

In the context of AT&T’s Geo Modeler, Kounev explained, radio propagation from cellular towers is high-frequency light that our eyes cannot see. The towers measure how the rays react to the surrounding environment, such as colliding with structures or reflecting off surfaces. That collected data is processed and analyzed by several internal AT&T systems and machine learning models to determine if changes or optimizations need to be made, in what AT&T calls «near scale time.»

Those changes can include everyday adjustments to the angle of nearby antennas or compensating for a tower that has gone offline during a natural disaster. Modifications can be deployed automatically in seconds or minutes, ideally in a way that doesn’t impact customers.

«We don’t want [customers] to notice,» said Jennifer Yates, assistant vice president of inventive science, network and service automation at AT&T Labs. «The network is self-healing [and] autonomous behind the scenes so they don’t have to think about it.»

The benefit can also be a technical challenge that you would never notice as an AT&T subscriber. «When you hit Lincoln Tunnel traffic at 5 o’clock in the afternoon and you can get your website loaded, that’s when we come in,» said Kounev. «We’re optimizing the network traffic … in rush hour, where you’re able to get your connection.»

Predicting where to deploy resources

Although day-to-day network optimization is one advantage of using the Geo Modeler, it’s also a tool for determining how and where the company should deploy resources during situations such as weather events. For instance, if a prominent tree is blown over during a storm, ray tracing can quickly build a new representation of how towers should compensate.

For large events like music festivals, where tens of thousands of phones are accessing the network or impending natural disasters, the technology can be used to predict upcoming changes that are needed; Kounev mentioned Geo Modeler was applied in April at the Coachella festival.

Kounev also explained that if a hurricane is coming, for example, knowing its estimated size and timing, «we can go in and within two minutes remove [within the model] the towers that we think are going to be affected, and then see what the network coverage is going to look like.» Knowing where to expect holes in the network allows AT&T to position resources, such as generators or mobile cellular towers, in place before the hurricane strikes.

Most predictive tools, said Kounev, rely on existing measurement data. «Because we use ray tracing, we can predict in places where there’s no measurement data.»

AT&T has been building the Geo Modeler for a year and has accumulated enough data from different use cases over that time to be confident about deploying it more broadly. Yates said that AT&T has performed extensive validation of data, comparing the modeler’s results with measurements in the field.

«Over the last year,» said Kounev, «we had to convince people that this thing can actually work in real time with the many tower stations they have.»

Technologies

In Honor of the Artemis II Mission, Explore the Moon in Fortnite Now

You might not be able to see the moon the way the Artemis II team is, but there’s an educational Fortnite simulation that will get you onto the celestial body’s surface.

You may not be able to explore the vast majesty of space in the same way that the four-person crew of the Artemis II is, but you can still get an up-close-and-personal view of the moon… in Fortnite, at least.

While you may not be able to slingshot around Earth’s own lunar body, space enthusiasts can see a little bit of what the Artemis II crew is seeing by spending time on the Lunar Horizons Fortnite map right now. The map is a creative collaboration between Fortnite’s creator, Epic Games, and the European Space Agency. Lunar Horizons was released in 2024 after extensive testing and play from ESA trainee astronauts.

If you’re looking to learn more about our own orbiting body, the Lunar Horizons map is an educational simulation of the surface of the moon’s South Pole.

It blends game mechanics with learning, as players get to build up their own sterile lunar habitat bases, interact with ESA astronauts and roll around with robotic rovers as they discover informative plaques that contain information about the moon and international space agencies. There are still dangers to navigate, too — a solar storm may strike when you least expect it.

If you’re interested in exploring the moon, we’ve got all the information you need to join in on the Fortnite fun below. And if you’re looking for a more serious livestream during this momentous human achievement, tune into NASA’s feed here.

How to join the Moon Fortnite island while you follow the Artemis II mission

The Lunar Horizons Fortnite map is a great educational simulation that shares details about ESA’s work and catalogs information about humanity’s lunar research.

These three simple steps will get you up and running (or more accurately, taking slow leaps and bounds) on the surface of the Lunar Horizons Fortnite map:

Download Fortnite

If you haven’t played Fortnite before, but you want to check out this limited-time event, you’ll have to download the game. If you’re on PC, you can download Fortnite for free from the Epic Games Store. Console players can navigate the PlayStation Store, Microsoft Store or Nintendo eShop in order to download Fortnite on their devices.

Navigate the in-game menus until you reach the Search button

Once you’re in the game, scroll down past the different official Fortnite game modes and the Discover tab until you find the Search button.

Input the Lunar Horizons island code

In the search bar, you can input a map’s name or its distinct search code in order to find it in the map directory. You can search for the Lunar Horizons map or input the code 3207-0960-6428 to explore this map in time.

Correction, 3:35 p.m. PT: This story initially was in error about the features available in the Lunar Horizons map. There is no Artemis II-specific mission in Fortnite. Rather, the Lunar Horizons map is an educational simulation of part of the moon’s surface.

Technologies

Today’s NYT Connections: Sports Edition Hints and Answers for April 7, #561

Here are hints and the answers for the NYT Connections: Sports Edition puzzle for April 7, No. 561.

Looking for the most recent regular Connections answers? Click here for today’s Connections hints, as well as our daily answers and hints for The New York Times Mini Crossword, Wordle and Strands puzzles.

Today’s Connections: Sports Edition is a fun mix of categories, and the purple one cracked me up. If you’re struggling with today’s puzzle but still want to solve it, read on for hints and the answers.

Connections: Sports Edition is published by The Athletic, the subscription-based sports journalism site owned by The Times. It doesn’t appear in the NYT Games app, but it does in The Athletic’s own app. Or you can play it for free online.

Read more: NYT Connections: Sports Edition Puzzle Comes Out of Beta

Hints for today’s Connections: Sports Edition groups

Here are four hints for the groupings in today’s Connections: Sports Edition puzzle, ranked from the easiest yellow group to the tough (and sometimes bizarre) purple group.

Yellow group hint: Fore!

Green group hint: Hockey Night in Canada.

Blue group hint: Meteorologist favorites.

Purple group hint: And they’re off!

Answers for today’s Connections: Sports Edition groups

Yellow group: Golf scoring terms.

Green group: Canadian NHL teams.

Blue group: Weather-themed teams.

Purple group: Things that race at MLB games.

Read more: Wordle Cheat Sheet: Here Are the Most Popular Letters Used in English Words

What are today’s Connections: Sports Edition answers?

The yellow words in today’s Connections

The theme is golf scoring terms. The four answers are birdie, bogey, eagle and par.

The green words in today’s Connections

The theme is Canadian NHL teams. The four answers are Canadiens, Canucks, Oilers and Senators.

The blue words in today’s Connections

The theme is weather-themed teams. The four answers are Hurricanes, Lightning, Storm and Thunder.

The purple words in today’s Connections

The theme is things that race at MLB games. The four answers are pierogis, presidents, sausages and the freeze.

Technologies

Trump Administration Bans Chinese Routers. Phones and Cameras Could Follow

Major companies, including Huawei and Hikvision, could see the last of their import orders cut off from the US within 30 days of implementation.

The Federal Communications Commission continued its crackdown on Chinese tech on Friday, issuing a new proposal that would extend a ban on companies to products previously authorized.

In 2021, companies such as Huawei, Hikvision, Dahua, Hytera and ZTE were added to the FCC’s Covered List, a record of companies and products that the FCC believes pose a national security risk to the US, under the Secure Networks Act. The Chinese companies produce mobile phones, security cameras and other tech products.

But the 2021 ban applied only to new models that the FCC hadn’t authorized, and companies were free to keep selling models that had already received the FCC’s stamp of approval. If approved, the new proposal would ban these companies entirely, including those previously approved products.

«Older models of covered equipment pose an unacceptable risk today when imported or marketed in the United States, not only when such equipment is new to the market,» an FCC report from October said.

The proposal will be open for comment until May 6, after which the commission will vote on whether to adopt the rules. The ban won’t affect devices already owned by Americans.

Millions of consumers and businesses rely on Wi-Fi routers, telecommunications equipment and security cameras every day, making these devices critical links in both home and office networks. The Federal Communications Commission shocked the broadband industry on March 23 by effectively banning the sale of future foreign-made Wi-Fi routers (including some of the biggest router brands).

In recent years, Chinese telecommunications companies have faced restrictions on operating in the US. In 2020, The Wall Street Journal cited US officials who reportedly said that Chinese companies, including Huawei, used backdoor access intended for law enforcement to track sensitive information.

But this ban could be implemented quickly. The FCC proposes that «all parties [will have to] cease all importation and marketing activities within 30 days of the effective date of the prohibition.»

This proposition doesn’t reflect a final legal ruling on telecommunications imports, but it does reflect how the Trump administration has been increasingly pressuring Chinese tech companies in recent months.

The foreign-made router ban was only the latest in a string of decisions that have placed restrictions on Chinese tech companies operating in the US.

In December, the FCC banned the importation of Chinese-made drones into the US. Just months before that, the agency voted to block new approvals for any device containing parts manufactured by companies on the Covered List.

Representatives from the FCC and Huawei didn’t immediately respond to requests for comment. The White House didn’t immediately respond to a request for comment.