sharing by Kathy SimonMilo Medin, one of the most respected communications engineers, co-authored what should become the basis for all discussion of spectrum allocations. Most thoughtful engineers realized a few years ago that shared spectrum usually delivers far more capacity because more users will usually mean more radios. While today's phones are not "software-defined" or completely "frequency agile," many support dozens of bands and the networks can almost always find less congested bands.

The most important recommendation is

"DoD should recommend that the NTIA, FCC and Department of State should advocate the reallocation of the C-band satellite spectrum to IMT-2000 5G use at the World Radio Conference later this year (WRC-19), and take measures to adopt sharing in all 500 MHz of the band in the United States on an accelerated basis for fixed operations." 

Almost all independent engineers conclude sharing is now the way to go. Columbia Professor & former FCC Chief Technologist Henning Schulzrinne in 2017 projected  OFCOM and some EU experts have said the same thing to me. More sharing is implied in the important White House PCAST report.

In "The 5G Ecosystem: Risks & Opportunities for DoD Defense Innovation Board," coauthors Milo Medin and Gilman Louie state plainly "The United States must invest in sub-6 capabilities and take steps to share its spectrum." The Medin and Gilman report concentrates on 500 MHz of spectrum currently allocated to defence but also addresses the 3.2-4.2 band.

This is almost politically impossible because Verizon and AT&T people are already fighting hard, but it's the right thing to do. It would end the satellite monopoly, which they were given at no charge and do not need. The sat guys want US$10 billion or more to give up spectrum they aren't using. It's unusual to U.S. licenses not to renew but the terms in the agreements I've read do not make it impossible. 

CTIA, which speaks for Verizon and AT&T in D.C., according to a news report, argues that monopoly spectrum should continue because that's how it was done in the past. The technology has changed; I'll hold back further comment until I get the complete statement.from them.

Milo and Gilman are very skeptical of the utility of mmWave. That opinion is shared by Neville Ray of T-Mobile but opposed by others. Millimetre wave performance is the most crucial open question in 5G.

 

dave ask

Newsfeed

The 3.3-4.2 spectrum should be shared, not exclusively used by one company, concludes an important U.S. Defense Innovation Board report. If more wireless broadband is important, sharing is of course right because shared networks can yield far more

It does work! Verizon's mmWave tests over a gigabit in the real world. 
The $669 OnePlus 7 Pro outclasses the best Apples and probably the new Galaxy 10 or Huawei P30 Pro. Optical zoom, three cameras, liquid cooling, Qualcomm 855 and more.
Korea at 400,000 5G May 15. Chinese "pre-commercial" signing customers, 60,000-120,000 base stations in 2019, million+ remarkable soon. 
5G phones Huawei Mate 20, Samsung Galaxy 10, ZTE Nubia, LG V50, and OPPO are all on sale at China Unicom. All cost US$1,000 to 1,500 before subsidy. Xiaomi promises US$600.
Natural monopoly? Vodafone & Telecom Italia to share 5G, invite all other companies to join.
Huawei predicts 5G phones for US$200 in 2021, $300 even earlier
NY Times says "5G is dangerous" is a Russian plot. Really.
Althiostar raised US$114 million for a virtual RAN system in the cloud. Rakuten, Japan's new #4, is using it and invested.
Ireland is proposing a US$3 billion subsidy for rural fibre that will be much too expensive. Politics.
Telefonica Brazil has 9M FTTH homes passed and will add 6M more within two years. Adjusted for population, that's more than the U.S. The CEO publicly urged other carriers to raise prices together.
CableLabs and Cisco have developed Low Latency XHaul (LLX) with 5-15 ms latency for 5G backhaul,  U.S. cable is soon to come in very strong in wireless. Details 
Korea Telecom won 100,000 5G customers in the first month. SK & LG added 150,000 more. KT has 37,500 cells. planning 90% of the country by yearend. 
The Chinese giants expect 60,000 to 90,000 5G cells by the end of 2019.
China Telecom's Yang Xin warns, "Real large-scale deployment of operators' edge computing may be after 2021." Customers are hard to find.
Reliance Jio registered 97.5% 4G availability across India in Open Signal testing. Best in world.

More newsfeed

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Welcome On Oct 1, 2019 Verizon turned on the first $20B 5G mmWave network with extraordinary hopes. The actual early results have been dismal. Good engineers tell me that will change. Meanwhile, the hype is unreal. Time for reporting closer to the truth.

The estimates you hear about 5G costs are wildly exaggerated. Verizon is building the most advanced wireless network while reducing capex. Deutsche Telekom and Orange/France Telecom also confirm they won't raise capex.

Massive MIMO in either 4G or "5G" can increase capacity 3X to 7X, including putting 2.3 GHz to 4.2 GHz to use. Carrier Aggregation, 256 QAM, and other tools double and triple that. Verizon sees cost/bit dropping 40% per year.

Cisco & others see traffic growth slowing to 30%/year or less.  I infer overcapacity almost everywhere.  

Believe it or not, 80% of 5G (mid-band) for several years will be slower than good 4G, which is more developed.