Sunday, July 21, 2024
Science & Technology

wifi 7? What it is | How Fast it is? Revolution for Metaworld

Wi-Fi (Wireless Fidelity), which means the transmission of data through radio waves via a machine that can be fitted inside your home, offices, schools, etc. There are many versions of Wi-Fi in the market, and as of August 2022 Wi-Fi 6E! is the one that is prevalent. This Wi-Fi6E Chip vendors like Qualcomm are making plans for wifi 7, the next generation of Wi-Fi technology. Qualcomm said at Mobile World Congress 2022 that it plans to launch the world’s first wifi 7 chip, the FastConnect 7800, as part of its new premium Snapdragon Connect specification by the end of 2022.

The wifi 7 specification, also known as 802.11be isn’t even close to being completed- the IEEE’s current paper on the current status of 802.11be calls for the standard’s ratification sometime in 2024. But as with previous Wi-Fi standards, that isn’t stopping vendors from developing silicon-based upon draft releases, tweaking them via firmware or other updates as the specification moves through its final approval process.

Yes, wifi 7 will be faster, in part because of wider channel widths. But the key improvement wifi 7 makes is how it smartly uses what earlier Wi-Fi versions have already provided it.


What is wifi 7? The Short Answer

wifi 7 will significantly increase Wi-Fi bandwidth. How much? According to the IEEE, the maximum nominal throughput (speed) of wifi 7 is 46Gbit/sec, 4.8 times faster than Wi-Fi6 and slightly faster than the 40Gbits/sec throughput delivered by Thunderbolt 3/4 connection.

In the real world, though, the numbers will be lower. According to Mike Roberts, the global vice president for product marketing at Qualcomm, the FastConnect 7800 will reach real-world throughput speeds of 5.8 gigabits per second, 60 percent more than the previous (Wi-Fi 6E) generation. The average latency will be less than 2 milliseconds, or 60 percent faster than the previous generation, he said. Mediatek demonstrated wifi 7 in action and claims that it’s 2.4 times faster than Wi-Fi6


wifi 7: Faster, Smarter, and with far less lag

Wi-Fi6 was optimized for congestion and wireless efficiency, enabling your router to effectively communicate with dozens of wireless devices. Wi-Fi6E weaved in a dedicated 6-GHz frequency, adding channels for high-bandwidth devices such as mesh routers to communicate with one another. If you think of wireless communication as lanes on a freeway, Wi-Fi 6E effectively added a dedicated HOV or commuter lane, giving high-priority buses and ambulances their own traffic-free channel.

In the real world, though, cars moving down a freeway can reroute themselves to avoid congestion. Until now, Wi-Fi couldn’t. A Wi-Fi 6 router can communicate data on both the 2.4-GHz, 5-GHz, and 6-GHz channels simultaneously, but they’re all independent of one another.

wifi 7 most significant improvement is that it transforms the router into a multi-link device. Several physical radios can communicate on separate frequencies, yet Wi-Fi7 ties them all together underneath a single MAC interface so that an Xbox or a smart speaker sees a single device. A Wi-Fi7 router can simply assign data packets to whatever frequency channel is the least congested, because it simply doesn’t care which frequency it uses.

wifi 7

Put another way, the days of manually configuring a device to be “on” a 2.4-GHz or 5-GHz network appear to be over. wifi 7 will choose which frequency band has the lowest congestion and send the data over that channel. Qualcomm calls this Alternating Multi-Link, where devices simply switch back and forth between available bands. Bouncing back and forth between channels also has implications for power saving, according to IEEE.

In a case where the wifi 7 router is only “talking” to another device, there’s another option that Qualcomm call “High Band Simultaneous Multi-Link.” With it, all bands are used simultaneously to blast data across all available radio frequencies. That means what it says. wifi 7 devices won’t necessarily communicate on, say, a 6-GHz channel—they’ll be able to theoretically communicate on all three at once. (Practically, that won’t happen; the 2.4-GHz band will continue to be reserved for slower IoT devices. In the Qualcomm FastConnect 7800, HBS Multi-link combines four streams across the two 5-and 6-GHz radios)

wifi 7

In part, this takes advantage of an additional feature: wifi 7 wide-channel spectrum use. According to Qualcomm, wifi 7 widens the maximum available channel width from 160-MHz to 320-MHz….a wider channel band equals more available throughput.

The kicker, however, is that the 320-MHz channel isn’t always available. Instead, wifi 7 can combine two 160-MHz channels in the high(5-6-GHz) bands to create an effective 320-GHz data channel. wifi 7 can then use these channels as it chooses, such as using one radio for communicating to a device and another for receiving data. wifi 7 also incorporates “preamble puncturing” which is a more aggressive way of handling interference. If a wifi 7 router is trying to connect to a channel that’s partially interfered with, the router doesn’t give up. Instead, it simply grabs the channel bandwidth that’s not being interfered with. The upshot is that wifi 7 will more efficiently use data.

There’s one big additional benefit. A wifi 7 router that can intelligently pick channels also significantly reduces wireless latency or lag. That will be perfect for gaming or for AR/VR ambitions, which demand latency-free video to prevent vertigo. We don’t know how this will play out, but in a world moving to cloud gaming, Metaverse, and VR, reduced latency may be the most significant addition of all.

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