It's currently used for military radar but NTIA is looking to make it available. The work around CBRS is proving that sharing spectrum can work, even if the military is an interested party. Before using the band, you would have to check with a database to see whether it isn't reserved. 

The classic example is naval shipboard radars. A user in Iowa is unlikely to cause interference. Research in the 3550 CBRS band finds most of the U.S. is not in use. It would be natural to simply expand CBRS down another 100 MHz. 

The primary source is a blog by David Redl at NTIA, below.

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henningFCC Chief Technologist Henning Schulzrine startled the engineers at a high level 5G wireless event by predicting a complete turnaround in spectrum policy and licensing.

Instead of "licensing" monopoly use of spectrum, "All new spectrum would be shared." That corresponds to the opinions of nearly all impartial top engineers, but of course is heresy to lobbyists in the EU and U.S.

Shared spectrum is better, but I fear Henning is being optimistic about what the politicians will do.

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Marty Cooper

Lowell was more polite, of course. Verizon didn't buy any spectrum in the last auction despite prices that were down by 50-60%. "We simply don’t need it," explains Chief Network Officer Nicola Palmer. Lowell McAdam told Morgan, "When you look at the spectrum and the cost of small cells versus the cost of spectrum in the old AWS auction sort of environment, it was clear to us that building the fiber infrastructure to densify via small cells was better than the alternative of a buying spectrum." CFO Matt Ellis explained to Craig Moffett, "Spectrum is one way that we can add that capacity, but it's not the only way," 

Technology allows adding relatively inexpensive capacity within existing spectrum faster than demand is growing. Verizon estimates the cost per bit is going down 40%/year; Telus estimates 55%. Verizon's capex has been flat to down but they now are offering new unlimited plans. McAdam expects capex to stay flat for the next decade, despite one of the largest 5G mmWave builds in the world.

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Malladi 2003.5, 3.7 GHz 1800. 2100. 2300. maybe even 700 can work just like LAA. Qualcomm, Verizon, and AT&T testing convincingly shows that commercial quality broadband can be delivered today over unlicensed spectrum. The telcos are targeting the Wi-Fi bands and possibly 3.5-4.2 GHz.

The same technology can be used to recover spectrum in licensed bands like 1800 & 2100, Especially in rural areas, massive amounts of licensed spectrum lie fallow. It would be enough, for example, to deliver a true gigabit of rural broadband.

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White space 16 megabits 200These may be the first customers getting more than 10 megabits reported anywhere. Michael Davies and Richard Yu of 6Harmonics in Ottawa have sent me test data showing customers with a connection phy rate of 16-18 megabits, as well as convincing details from other deployments doing better than that. I thank Boston Consulting Group for pushing me to go beyond published reports and get these new results. The fuzzy photo below shows eight users connected to a base station using a single 6 MHz channel. They have deployments in California and North Carolina using two channels for nearly double the speed. High speed uplink is included.

They are ready with a three channel unit for even higher speeds. Yu has been working on multiple antenna systems (MIMO) for almost 20 years. I'm sure he can achieve even better throughput using more antennas. They seem to be so busy actually building the equipment they haven't had time to get the latest results up on their web site. CEO Yu, off the record, shared remarkable predictions for what they will offer within a year. 

 

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Nicola Palmer 200 "We have sufficient spectrum holdings below 1 GHz," says Chief Network Officer Nicola Palmer. "We have strong spectrum holdings in the 700, 850, 1900 megahertz (MHz)/PCS, AWS 1 and 3 spectrum bands. So why didn’t we bid on the 600 MHz spectrum? We simply don’t need it."

Verizon has 40 MHz of fallow spectrum ready for 4G, enough to move from two bands of 20 MHz to four bands and roughly double capacity. Palmer points out 3G traffic is dwindling rapidly, allowing VZ to refarm 3G spectrum.
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dave askAugust 2018 Verizon's $20B 5G build is starting to add customers in 2018. Gigabit LTE & Massive MIMO became real in 2017 and enow expanding worldwide. Almost all the other "5G" is mid-band, 70%-90% slower + hype. Europe is mostly pr. The term 5G has been bastardized, unfortunately.

Being a reporter is a great job for a geek. I'm not an engineer but I've learned from some of the best, including the primary inventors of DSL, cable modems, MIMO, Massive MIMO, and now 5G mmWave. Since 1999, I've done my best to get closer to the truth about broadband.

Send questions and news to Dave Burstein, Editor. I always want to hear from you, especially if you catch a mistake.

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 5G Why Verizon thinks differently and what to do about it is a new report I wrote for STL Partners and their clients.

STL Partners, a British consulting outfit I respect, commissioned me to ask why. That report is now out. If you're a client, download it here. If not, and corporate priced research is interesting to you, ask me to introduce you to one of the principals.

It was fascinating work because the answers aren't obvious. Lowell McAdam's company is spending $20B to cover 30M+ homes in the first stage. The progress in low & mid-band, both "4G" and "5G," has been remarkable. In most territories, millimeter wave will not be necessary to meet expected demand.

McAdam sees a little further. mmWave has 3-4X the capacity of low and mid-band. He sees an enormous marketing advantage: unlimited services, even less congestion, reputation as the best network. Verizon testing found mmWave rate/reach was twice what had been estimated. All prior cost estimates need revision.

My take: even if mmWave doesn't fit in your current budget, telcos should expand trials and training to be ready as things change. The new cost estimates may be low enough to change your mind.