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T-Mobile says millimeter-wave 5G will never scale beyond dense urban areas



  T-Mobile CTO Neville Ray stands in front of a backdrop that states
Enlarge / T-Mobile CTO Neville Ray.

5G mobile networks have begun, but only to a very limited extent and misleading claims by mobile operators.

While all four major nationwide airlines in the United States have exaggerated 5G to varying degrees, T-Mobile has today admitted the notable limitation of 5G. Neville Ray, T-Mobile's Chief Technology Officer, said in a blog post that the 5G millimeter-wave spectrum will never scale beyond the small pockets of 5G hotspots in dense urban environments. This seems to rule out the possibility that 5G's fastest speeds will reach rural areas or even suburbs.

Ray asserted his point of view with this GIF, which clearly shows that millimeter-wave frequencies are blocked immediately by a door closing during the lower 600 MHz. The signal is not affected:

T-Mobile

High-frequency range short range

At 4G, carriers prioritized the so-called "beach spectrum" below 1 GHz to cover the entire US regions and cities.

5G networks will use both low and high frequencies, but they should offer their highest speed on millimeter waves. The millimeter-wave spectrum normally includes frequencies between 30 GHz and 300 GHz. In the context of 5G, carriers and controllers have generally targeted frequencies between 24 GHz and 90 GHz. T-Mobile's high-frequency spectrum includes licenses in the 28 GHz and 39 GHz bands.

In mobile networks, millimeter waves have generally not been used because they do not travel far and are easily blocked by walls and other obstacles. This has led us to wonder how extensive 5G high-speed out-of-town deployments will be, and now the T-Mobile technology representative says millimeter-wave 5G deployments will only be for "small bags" in densely populated areas , 19659004] Ray wrote his blog post primarily to complain about AT & T and Verizon, who claimed to be the first provider of 5G, which is why his statement on high frequency restrictions was partly explained why T-Mobile has not yet introduced 5G Has. (Except for a Motorola phone sold by Verizon that requires access to 5G, there is no 5G phone on the market.)

"Verizon's 5mm plan is for the little ones it will never reach rural America, "Ray wrote. Ray pointed out that early reviewers of Verizon's small 5G launch had difficulty finding a signal.

"Part of it is physics – the millimeter-wave spectrum (mmWave) has great potential in terms of speed and capacity, but is not far from the cell and does not penetrate materials at all," Ray continued. "It will never scale beyond the small pockets of 5G hotspots in dense urban environments."

The 5G industry standard was developed to enable higher frequencies in mobile networks with improved beamforming and massive MIMO technology. The 5G industry standard can be used for all frequencies from below 1 GHz to millimeter waves, but a spectrum above 6 GHz is needed to achieve the ultra-high broadband speeds provided for 5G. Currently, the 26 GHz and / or 28 GHz bands have international support in this area, "the GSMA mobile group said in a whitepaper in November 2018.

The GSMA described the use of frequencies above 24 GHz This is mainly due to the sheer amount of unused frequencies in higher bands – it's much harder to find large unused spectrum blocks below 1 GHz.

"A very small footprint"

T-Mobile intends to use millimeter-wave spectrum Ray wrote today to provide "enormous capacity in the smallest of spaces." "It promises speed and capacity in densely populated urban areas and places where many people gather." However, covering the larger 5G areas still requires a low and midband spectrum.

Ray criticized Verizon for "roll [ing] out" Technology, which is by no means ready for primetime. "He also criticized AT & T for renaming 4G as" 5G E "and for rollout of 5G in some cities without selling 5G phones.

" I have exactly the same 5G mmWave network devices and – Software like AT & T and Verizon In no case would we bring this to market for customers now, "he wrote.

The 5G standard calls for download speeds of 20 Gbps and 1 ms latency at a Verizon 5G speed test Download speeds of 762 Mbps and latencies of 19 ms have been noted in Chicago, but Verizon's 5G coverage in Chicago and Minneapolis, the two start cities, is hard to find.

T-Mobile also overheats 5G

Despite Rays Realism beyond the limits of millimeter-wave signals, T-Mobile said It was not afraid to exaggerate the advantages of 5G CEO John Legere recently started in a blog post with the complaint that "it's so damn much noise and Desin Forming about 5G on the market makes it virtually impossible to separate the truth from BS. "

But in the next paragraph, Legere claimed that 5G was" the most transformative technology of our lives, "but provided no evidence to support this great statement.

T-Mobile has also claimed that it could only build a robust nationwide 5G network if the government allows it to buy Sprint, even though the company's earlier statements on its 5G plans contradicted these allegations.

Ray's blog post reaffirmed this merger claim, even though recent reports suggest US regulators are unconvinced. Ray argues that T-Mobile and Sprint will combine a mix of low-band, mid-band and high-band to create a "deep and deep, truly nationwide 5G network".

While Verizon demands an additional $ 10 a month for 5G, Ray promised that T-Mobile "will no longer charge our customers for 5G while Verizon and AT & T continue to raise prices."


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