ATT 94 meg 5G 230

Gordon Mansfield of AT&T "told [management] that I want every day that’s left in the year ... The equipment is literally coming off production lines and going into the field — we are not even using normal shipping channels.” AT&T is the first in the world to use 39 GHz, a remarkable achievement.

AT&T has one of the best and most experienced senior engineering teams in the world, but the first efforts are struggling. It claims the supplier - probably Ericsson - isn't ready with the equipment in the 39 GHz band. They refuse to provide information on network speed. It may be as low as 250 megabits, half the LTE speed at T-Mobile in Manhattan.

Lessons learned:  

 “Now, in mmWave, it’s a new frontier.  Sometimes you expect the signal to be there and it isn’t, so you have to adjust. As you move through the coverage area, you will be served by different beams, and you have to understand transitions between beams,” said Hristov. “RF engineers have to be hyper-accurate about placing and facing nodes … [because] if you don’t land on the right beam, you won’t get maximum performance.”

Mansfield also said, "The first IoT devices will be really high-end." Most users will "trade off capability for cost.” said Mansfield, noting that the first 5G IoT devices will be “really high-end.” I believe almost everyone will continue to use Bluetooth, Wi-Fi and 4G for IoT for years. 5G units will not just be expensive. They will be large and run down the battery. 

Todd Zeiler confirms that mmWave and sub-6 are very different. "We need to explain that we have a fork in the road now. Millimeter wave will have a similar improvement, but sub-6 is about a more efficient interface with improved latency — it’s not about speed-doubling." 3GPP did the world a disservice by calling both 5G.

The AT&T folks agree there's a long way to go. Hristov notes, “It will take years to get to the point where you have the right tooling to accurately predict what you are trying to cover and serve," Zeiler adds, "software upgrades in 2019 that enhance beam-forming capabilities not expected to be mature until sometime in 2020."  

The good news: "Coverage and data rates have generally been better than expected."

Quotes from 5G Networks Under Construction by Rick Merritt of EE Times.

The picture is a pre-launch demonstration by AT&T shot  by Corinne Reichart of ZD Net

 

dave ask

Newsfeed

Samsung has delivered 5G chip samples to BBK's Oppo and Vivo, the #2 or #3 phones manufacturer. Samsung is facing off against Qualcomm in the 5G market. Qualcomm is unfazed and reportedly moving the production of their next chip from TSMC to Samsung. 

Sprint's 2.5 GHz 5G is delivering 100-500 megabit downloads consistently. That bodes well for China Mobile, using the same frequencies.

Vodafone, BT, and soon 3UK are delivering modestly sized 5G mid-band networks. Vodafone is also live in Spain and Italy. 

Sunrise in Switzerland is using 5G mid-band for fixed wireless in rural areas.  

More newsfeed

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Welcome  1,000,000 Koreans bought 5G in the first ten weeks. The demand is there, and most of the technology works. 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.