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Wi-Fi 7 Stomps on the Gas

At 40 gigabits per second, it’ll be four times as fast as Wi-Fi 6

3 min read
Wi-Fi 7 Stomps on the Gas
Harry Campbell

Consumer technology is often a story of revolutionary leaps followed by a descent into familiarity. The first computers advanced so quickly that new models went obsolete while they were still on store shelves. Today, any US $500 laptop will be relevant for a decade. A similar story can be told of smartphones, TVs, even cars.

Yet there is one technology that has escaped this trend: Wi-Fi.


Wi-Fi went mainstream with the 802.11g standard in 2003, which improved performance and reliability over earlier 802.11a/b standards. My first 802.11g adapter was a revelation when I installed it in my ThinkPad’s PC Card slot. A nearby café jumped on the trend, making a midday coffee-and-classwork break possible. That wasn’t a thing before 802.11g.

Still, 802.11g often tried your patience. Anything but an ideal connection left me staring at half-loaded Web pages. I soon learned which spots in the café had the best connection.

Wi-Fi 6, released in 2019, has maximum speeds of 600 megabits per second for the single band and 9,608 Mb/s on a single network. That’s nearly 40 percent as fast as the Wi-Fi 5 standard and more than 175 times as fast as the 802.11g connection I used in 2003.

Such extreme bandwidth is obviously overkill for Web browsing, but it’s a necessity for streaming augmented- and virtual-reality content.

Those figures, while impressive, don’t tell the whole story. Peak Wi-Fi speeds require support on each device for multiple “spatial streams”—that is, for multiplexed channels. Modern Wi-Fi can support up to eight spatial streams, but most consumer-grade Wi-Fi adapters support just one or two streams, to keep costs down. Fortunately, Wi-Fi 6 boosts the performance per stream enough to lift even entry-level Wi-Fi adapters above gigabit speeds.

That’s key, as gigabit Internet remains the best available to most people across the globe. I’m lucky enough to have gigabit service, and I’ve tested quite a few Wi-Fi 6 devices that hurdle this performance bar. It renders gigabit Ethernet nearly obsolete, at least for most home use. And you don’t need to spend a fortune: A basic Wi-Fi 6 router like TP-Link’s AX73 or Asus’s RT-AX3000 can do the trick.

Wi-Fi 6E, released in 2020, further improves the standard with a 6-gigahertz band that appears as a separate connection, just as 2.4- and 5-GHz bands have appeared separately on prior Wi-Fi networks. It’s early days for Wi-Fi 6E, so device support is limited, but the routers I’ve tested were extremely consistent in hitting the peak potential of gigabit Internet.

Wi-Fi 6 already reaches a level of performance that exceeds the Internet service available to most people. Yet the standard isn’t letting off the gas. MediaTek plans the first demonstration of Wi-Fi 7 at CES 2022 (the standard is expected to be released in 2024). Wi-Fi 7 is expected to boost maximum bandwidth up to 40 gigabits per second, four times as fast as Wi-Fi 6. Such extreme bandwidth is obviously overkill for Web browsing, but it’s a necessity for streaming augmented- and virtual-reality content.

This rapid improvement stands in contrast to the struggles in cellular networking. In theory, 5G can meet or beat the performance of Wi-Fi; Qualcomm claims its latest hardware can hit peak data rates of 20 Gb/s. But the reality often falls short.

The performance of 5G varies between markets. A report from OpenSignal found customers of Taiwan’s FarEasTone can expect average download speeds of nearly 448 Mb/s. Verizon and AT&T customers in the United States average just 52.3 Mb/s. 5G is also saddled with confusing and deceptive marketing, such as AT&T’s decision to brand some 4G phones as “5GE.”

Inconsistent 5G cuts especially deep for consumers because the problem is out of their hands. If you want faster Wi-Fi, you can make it happen by purchasing a new router and, possibly, an adapter for older devices. But if you want faster mobile bandwidth data, tough luck. You could try a new smartphone or switching providers, but both options are expensive, and improvements aren’t guaranteed. The best way to improve cellular data is to improve the infrastructure, but that’s up to your service provider.

Perhaps cellular providers will get their act together and bring the best 5G speeds beyond dense urban centers. Until then, Wi-Fi is the way to go if you want maximum bandwidth without a cord.

The Conversation (1)
Geoffrey Coram11 Jul, 2022
SM

"It renders gigabit Ethernet nearly obsolete, at least for most home use." Most home use, I think, doesn't come close to using gigabit speeds, so I don't know how gigabit Ethernet is "nearly obsolete." I've seen estimates that 4K UHD streams take about 25Mbps, so even if the four members of my family were watching their own stream, it's just a tenth of a gigabit.

Illustration showing an astronaut performing mechanical repairs to a satellite uses two extra mechanical arms that project from a backpack.

Extra limbs, controlled by wearable electrode patches that read and interpret neural signals from the user, could have innumerable uses, such as assisting on spacewalk missions to repair satellites.

Chris Philpot

What could you do with an extra limb? Consider a surgeon performing a delicate operation, one that needs her expertise and steady hands—all three of them. As her two biological hands manipulate surgical instruments, a third robotic limb that’s attached to her torso plays a supporting role. Or picture a construction worker who is thankful for his extra robotic hand as it braces the heavy beam he’s fastening into place with his other two hands. Imagine wearing an exoskeleton that would let you handle multiple objects simultaneously, like Spiderman’s Dr. Octopus. Or contemplate the out-there music a composer could write for a pianist who has 12 fingers to spread across the keyboard.

Such scenarios may seem like science fiction, but recent progress in robotics and neuroscience makes extra robotic limbs conceivable with today’s technology. Our research groups at Imperial College London and the University of Freiburg, in Germany, together with partners in the European project NIMA, are now working to figure out whether such augmentation can be realized in practice to extend human abilities. The main questions we’re tackling involve both neuroscience and neurotechnology: Is the human brain capable of controlling additional body parts as effectively as it controls biological parts? And if so, what neural signals can be used for this control?

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