Latency U 2305G latency in the US in 2019 should normally be 30-40 ms, down from 43-57 ms on LTE. The chart at left or follow the link. That's a 20% to 35% improvement, welcome but not game-changing. The "1 ms" latency is a fantasy.

Improving the backhaul/transit system and/or installing an Edge Cloud within the carrier network can bring that down to 15-25 ms in many places. 

1 ms is possible in the lab with test equipment, but the actual gear going into the field is about 10 ms from phone to tower (Verizon and AT&T data.) 

To that, you have to add the time from the tower to the server, which is the majority of the current latency.

The backhaul/transit delay is greater than the "air latency." The implication is that improvements behind the tower can contribute the most to reduced latency. Telefonica, Deutsche Telekom, and Verizon are proving that in the field. 

Enrique Blanco at Telefonica has reduced the number of hops to about four from one end of the network to the other. Deutsche Telekom is actively building an Edge Cloud and seeing 20-25 ms.

Verizon is the most aggressive. Its 5G build is one of the most extensive in the Western world. Less known is that Lee Hicks' One Fiber plan is ripping out 200,000 pieces of equipment and replacing them with about 20,000. The new gear is much faster and the number of hops fewer. Verizon hasn't released any latency figures but I'm sure it's down substantially.

Hicks has said the rebuild pays for itself in two or three years. "We are saving 50% the first year." Overall, including Massive MIMO, carrier aggregation, and 5G, Verizon's costs are falling at 40% per year. 

NR is not a near-miraculous way to reduce latency and investing in other parts of the network probably has a larger payoff.

dave ask


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.

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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.