10 gig requires a remarkable 160 MHz+ but it makes a great headline. With this 8x8 chipset, realistic speed will head to a gigabit and higher, in a room with just the right walls for the MIMO to work. Update Sept 15. Quantenna writes me they expect production quantities in 3-4 months.
Speeds through a wall go down severely with any WiFi, but throughput even through walls should be excellent. MU-MIMO - dedicating the 8-12 streams 1, 2 or 4 to an individual device with beamforming - should give each of the devices excellent throughput. Quantenna has distributed samples but production quantities are in the future.
If you have no neighbors and completely uncontested WiFi frequencies, you will sometimes be able to measure a nominal 9 or 10 gigabit WiFi from Quantenna and Freescale's new chips. You'll need an ideal location, with just enough interference to bounce the 12 separate signals but not enough to significantly slow anything down. 160 MHz is about the entire bandwidth of the combined AT&T and Verizon LTE networks, far more than will be available to most of us in most places. So the many MU-MIMO connections will have more practical impact for most of us. In addition, they are squeezing a heck of a lot of data in, going to a 1024 QAM constellation, needing extraordinary analog circuitry and minimal interference.
Twenty years ago, Arogyaswami Paulraj discovered using more antennas could multiply the throughput of a wireless network. That day it rained on the Stanford campus and he moved his multi-transmitter experiments indoors. Because the transmitters would be close together, he expected poor results. To his surprise, the separate signals came in clearly. He had invented MIMO.
1.6 gigabytes cellular, 8.1 gigabytes Wi-Fi in USA. Hating overage charges, Americans are shifting away from cellular. Strategy Analytics is finding the percent of traffic over Wi-Fi is increasing. That's pretty simple for most people - just don't watch TV when you aren't in Wi-Fi reach.
SA's data is based on a panel of 3,000 phones, enough for statistical significance if randomly chosen. Given that's it all opt-in, it's likely skewed toward more self-aware users. I'd guess a random panel would be slightly less Wi-Fi centric, perhaps ?75% rather than 83%.
Jean-Paul Sartre died in 1980. There were fewer than a thousand cellphones in the world. The World Wide Web was a decade away. He's the most prominent existentialist philosopher. There's no obvious connection between his work and this analysis of the impact of Wi-Fi on telephone companies.
As I write in August, 2015, it's not clear whether the panic telcos are demonstrating about Wi-Fi is justified. Verizon is running scared about the risk they face from Wi-Fi offload. That's the most powerful signal that WiFi is a real threat. On the other hand, Cisco and AT&T continue to project 40%-50% growth in data demand for four or five years at least. I haven't seen any convincing data to the contrary.
WiFi is an existential threat to telco revenue so they are fighting back in many ways. "5G-for-all presents the opportunity to kill free WiFi and instead charge users for every data packet they send or receive," Colin Johnson reports at EE Times. The implications Johnson heard at an Intel event inspired his title, 5G the Free WiFi Killer. The speakers were Verizon VP Bin Shin, SK Telecom CTO Alex Choi and Ericsson VP Paul McNamara.
Johnson is on target that eviscerating WiFi is a crucial goal of the giant telcos. I'm not as confident as the author that high-powered, all-encompassing home gateways mean the end of free WiFi The danger is currently unproven but we certainly need to avert the possibility. The more immediate danger is the telcos want to "Enclose" half or more of the WiFi spectrum. An important Wall Street Journal article by Thomas Gryta and Ryan Knutson has made this a top of mind issue in Washington. They conclude with Harold Feld's comment that Wi-Fi is too important to give carriers the ability to slowly strangle it.
50-70% of wireless traffic now goes over WiFi, a figure that will increase as faster WiFi routers become common and more home gateways are configured to share unused bandwidth. The telcos are working in closed industry fora, making a mockery of the U.S. and EU commitment to an open Internet and the "multi-stakeholder."
Perlman's pCell Loaded With Hype But NY Times Calls 48 Megabits Over 100 Megahertz Of Spectrum Breakthru
Steve Perlman's pCell claims require a reality distortion field. Update: 2 professors confirm below. Second Update. Met with Perlman and engineers. He has real engineers who did a slick trick using iPhones as LTE receivers. They may also have some neat tricks in MU MIMO and SON. Not close to their claims and most not new. Update 3: They don't give details about the software inside their server. It could be seriously interesting as improvements on how cells work together. Or it could be not. More to come. Original: Nick Wingfield in the Times believed a demo that could be reproduced on a cheap home WiFi router demonstrates a wireless breakthrough. The Times showed 8 iPhones simultaneously playing HD video. Reporter Nick Wingfield wrote, "that would ordinarily bring a cellular network to its knees." Netflix streams at 5.5 mbps or less, so 8 streams is less than the 50 megabits even a modest cell site delivers, with 100-150 megabits becoming the standard rapidly. Within the space of a loft, speeds would be much higher. A 300 megabit router at Fry's this week costs $44.95 ; Fry's is selling a gigabit router for $129.95 . Ericsson has demo'd 800 megabit LTE in a van driving around Stockholm. 48 megabits or even 400 megabits in a small space is not an advance.
Vodafone buys 110 MHz in German auction, DT 100 MHz. DT & Vodafone already offer 50-100 megabit LTE, which will increase in the next few years to a gigabit. LTE Advanced in the lab delivers over a gigabit in 100 MHz of spectrum, 5 channels of 20 MHz, 8 x 8 MIMO.
As I write in August, 2015, a 450 megabit 3 channel, 4x4 MIMO is the fastest in field deployment. In the three years since Nokia demonstrated 1.5 gigabits over 100 MHz, engineers have been working furiously to deliver that speed in production.
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