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


Rethinking Jan 27: Coronavirus could invalidate all projections. I reported on AIDS for 2 years. This could be worse because it spreads in air. Let us hope and pray.

Details on all 5G phones, as prices drop to $285 ** All actual 5G networks worldwide ** Facebook ordered to repost Italian fascist page. ** Apple China sales down 35%** Qorvo sees 300M 5G 2020 & 750M 2023 mmWave <10%

** Bharti demands India Gov more than double prices and enforce cartel. Sunil Mittal "Situation is dire. It is a matter of survival for everyone." ** Wi-Fi 6 meets ITU 5G criteria @stephenjcrowley ** Samsung $8B for Chinese memory plants ** Morgan paying billions for Altice fiber

Dec 10 Sprint bringing $300-500 5G phones to US 2020. Nokia, Lenovo, HMD ** H., Apple, and AMD doing 5 nm test runs on TSMC's 5 nm. Early results are 15-30% better than 7 nm ** AT&T low-band 5G built to >65% US. Speeds slower than 4G at launch. ** 

Verizon CEO Ronan Dunne: >1/2 VZ 5G "will approximate to a good 4G service" Midband in "low hundreds" Mbps ** CFO John Stephens says AT&T is going to cut capex soon. ** Huawei in 16 days sold 1,000,000 5G Mate 20s.  


Welcome  Asia is installing hundreds of thousands of 5G radios and adding 5G subs by the tens of millions. The west is far behind. 200,000,000 in 2020

The demand is there, and most of the technology works. Meanwhile, the hype is unreal. Time for reporting closer to the truth.

I'm Dave Burstein, Editor. I've been reporting telecom since 1999. I love to hear from readers and say thank you when you find an error.

Also see,