When so much of modern life relies on being connected, dealing with slow or unreliable Wi-Fi can be infuriating. Films buffer, games lag and smart home systems become unusable. It’s no wonder that every new iteration of wireless technology leans heavily on the promise of making those frustrations disappear.
Wi-Fi 7 is the latest wireless standard to do just that, bringing with it some incredible claims – chief among them its headline speeds of “up to 46 gigabits per second (Gbps)”. That’s almost five times the 9.6Gbps maximum speeds of Wi-Fi 6/6E, and would be enough to download an entire 4K film in about eight seconds.
The only problem is that most homes won’t see anything that comes remotely close to that. In real-world testing, speeds are far lower – often in the hundreds of megabits per second (Mbps) – and that’s before you even consider that most broadband services in the UK currently top out at between 1 and 2Gbps.
So what’s going on?
The real world vs lab conditions
The gap between these quoted speeds and what a user will actually experience comes down to how wireless networks work the moment you step outside of ideal lab conditions – and that’s affected by everything from the way houses are built to how the airwaves are regulated.
The huge speed claims do at least reflect some genuine technical advances. Formally known as 802.11be, Wi-Fi 7 is designed to increase the amount of data a wireless network can carry – particularly in homes and public spaces that are crowded with connected devices.
Wi-Fi 7 tackles that congestion in a few key ways. Most importantly, it uses wider ‘channels’ of the electromagnetic spectrum – up to 320 megahertz (MHz) wide, double that of Wi-Fi 6E – which is like opening up more lanes on a busy motorway.
It also relies on a feature called Multi-Link Operation (MLO), which allows it to use multiple frequency bands more flexibly – namely the 2.4 gigahertz (GHz), 5GHz and 6GHz bands – so devices can find the cleanest path through a crowded network. There’s also a denser encoding method, known as 4096-QAM, that squeezes more bits into each signal, boosting throughput when conditions are good enough.
On paper, all of that adds up to a considerable leap in capacity – and, under ideal conditions, extremely high speeds.
Speed bumps
There are a few catches, however. First of all, the benefits of Wi-Fi 7 come through hardware, so they’ll only materialise when you’ve got devices that support the standard end-to-end. That means as well as paying hundreds of pounds for a new router, you’ll also need the very latest phone, laptop and smart devices to get the full benefit of any improvements.
Unless you’ve got the budget to upgrade everything all at once, you’re likely to be living with devices that offer a mix of old and new standards for years, so any benefits of Wi-Fi 7 will only be felt gradually over time. That might be less impactful than people expect.
Secondly, those gains rely heavily on the signal quality holding up. “The theoretical speeds of Wi-Fi 7 are measured in a laboratory under ideal conditions,” says Dr Richard Rudd, a chartered engineer and director at telecoms consulting firm Plum Consulting.
“But in practice, signals in houses are greatly affected by the building structure, interference from other devices and building layout – particularly at the higher 6GHz frequencies, where the signal weakens more quickly over distance.”
In other words, Wi-Fi 7’s maximum speeds assume an ideal signal-to-noise ratio – a world where our home networks have a strong and stable signal, and devices are always placed as close to the router as possible. That’s because the further a signal has to travel to reach a device, and the more obstacles or competing signals it encounters along the way, the harder it becomes to sustain those top high speeds.
This trade-off is not solely a quirk of Wi-Fi 7, though; it’s why every wireless standard has a gap between its maximum speeds and real-world performance. It's actually a fundamental concept of wireless communication.
“The Shannon-Hartley theorem says that the capacity of a channel is directly proportional to bandwidth,” says Prof Izzat Darwazeh, director of UCL’s Institute of Communications and Connected Systems.
“So, yes, under ideal circumstances, Wi-Fi 7’s 320MHz channel should have twice the capacity of Wi-Fi 6E’s 160MHz. Except the Shannon-Hartley theorem also tells us that as noise goes up (as the signal quality gets worse), that capacity goes down. And there are so many things in the home that affect signal quality – clutter, furniture, doors, even how we hold our phones. These are the complexities of a real environment compared with a lab.”
So Wi-Fi 7 can’t escape the messy reality of walls, windows, neighbouring networks and incompatible hardware, but that doesn’t mean it’s all snake oil. A study by internet speed-testing site Ookla last year suggested that the speed gains were real, even if the results were worlds away from the maximum speeds advertised.
It found median download speeds on Wi-Fi 7 kit using EE’s fixed broadband service reached 665.01Mbps – four times the performance recorded on EE-based Wi-Fi 6 connections in the same period, with upload speeds almost twice as fast.
More meaningful benefits
Speed is always a popular metric to focus on, but there may be more meaningful benefits elsewhere. Trials carried out by the Wireless Broadband Alliance (WBA) reported that the standard delivered lower latency, reduced jitter and more consistent performance across multiple rooms, compared to Wi-Fi 6.
“Wi-Fi 7 isn’t just about more speed, it’s about delivering a more predictable and consistent user experience,” says Bruno Tomas, chief technology officer at the WBA.
“During our tests, we reached 3.5Gbps in a typical home environment, with peak speeds of 4.2Gbps in our second phase in Turkey. Those speeds were sustained across multiple rooms and it’s that stability that really makes the difference compared with previous generations.”
Tiago Rodrigues, WBA president and CEO, concedes that service providers should be doing better with the way Wi-Fi 7 is marketed, however. “I think operators have a very important role to be more clear with their customers about exactly what they should expect, and do some education.
"I think of maximum Wi-Fi speeds like the fuel consumption on a car – the theoretical numbers are very different to real life. If you’re buying a 1Gbps broadband service for your home, you can’t magically get 46Gbps out of it.”
In the UK, there’s another constraint to consider, with Wi-Fi 7 not just limited by physics but also by policy and regulation. Access to the wider, less congested 6GHz spectrum that Wi-Fi 7 can benefit from is currently more restricted here and in Europe than in places like the US – though that might change soon as Ofcom and European regulators revisit and decide how the upper part of the band is shared.
Still, it means that some of Wi-Fi 7’s technical capabilities aren’t accessible for people in the UK, even if for most ordinary users, those limits are unlikely to be noticeable at home.
“At present, it’s true to say that the ultimate performance offered by Wi-Fi 7 can’t be exploited in the UK and Europe, but this will certainly improve with time,” says Rudd. “Whether the limitations would be noticed by most users is much harder to judge though, since the capabilities of Wi-Fi 7 greatly exceed the current needs of most users.”
Reality vs hype
That last sentiment is the biggest problem for Wi-Fi 7 at the moment. While many of the technical improvements of Wi-Fi 7 are clear, the real-world benefits for most people still aren’t – particularly if you’ve already got a Wi-Fi 6 or 6E router, says Mark Jackson from ISPreview UK.
“I think if most of your kit is already Wi-Fi 6-capable then you shouldn’t worry about upgrading,” he says. “But there are some groups of people who might want to consider it. Online gamers may well see the benefit of having the latest technologies.
People with much older generations of Wi-Fi too – but that’s more about potential security flaws than performance gains. The rest [of us] should probably just upgrade naturally, just as we all cycle our devices with newer kit eventually.”
Prof Darwazeh agrees. “The key advantages of Wi-Fi 7 aren’t for the likes of you and me at home. They’re for our lecture theatres, our planes, our football stadiums – places where there are a large number of users connecting at once. For home use, the benefits are currently mostly hype and, with the exception of large households, most people don’t need more than about 50Mbps to do all the things they need.
“Of course, technologies like this tend to create new use cases over time and I expect that’s what we’ll see here too.”
All of this leaves Wi-Fi 7 in a slightly awkward place. Its headline speeds might not deserve the focus they so often get, but its technical advances are real, and those improvements can still make wireless networks faster, more stable and better able to cope with lots of devices at once.
They’re attractive benefits, but the scale of what Wi-Fi 7 can deliver is also beyond what most households need right now. For many homes, the speed of your connection matters less than how well that signal is distributed.
Ensuring a router has an optimal placement in your home, paying attention to channel interference or setting up a mesh system with extenders will almost certainly have a better impact than simply chasing more speed.
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