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User Rank: Blogger
4/25/2016 | 12:54:11 PM
Re: Verizon has already optioned XO's spectrum as well
AT&T is just starting tests, I would expect them to announce more partners for trials as they start to go out into the field.
TV Monitor
TV Monitor,
User Rank: Light Sabre
4/25/2016 | 12:41:41 PM
Re: Verizon has already optioned XO's spectrum as well
Here is an explanation of why AT&T took the wrong path to 5G.


"In response to a question from the audience during his keynote, Keathley declined to talk about 600 MHz because it's in a quiet period, but he did say it's possible and probably likely that the same air interface can be used for both millimeter wave and sub 6 GHz spectrum."

Sorry, the electromagnetic property of mmwave and Sub-6Ghz waves are different enough that different modulation has to be used.

This is why non-OFDM based Samsung 5G reaches 2 km range at 28 Ghz, while Ercisson's OFDM based 5G falls flat at only 100 m. OFDM as it stands is not suitable for mmwave transmission.

This is why Ericsson's 5G effort is failing, and AT&T's calculation of saving money by using same basestation to serve below 6 Ghz and 28 Ghz spectrum.
TV Monitor
TV Monitor,
User Rank: Light Sabre
4/24/2016 | 7:56:08 PM
Ericsson doesn't have a working 28 Ghz tech and AT&T bet on the wrong horse
Ericsson doesn't have a working 28 Ghz 5G tech and 15 Ghz was chosen for engineering convenience, not that that spectrum would widely be available for 5G services around the globe except for Europe.

Now that it is becoming clear that the US 5G will be serviced at 28 Ghz and 39 Ghz band, Ericsson and Qualcomm are trying to catch up but it is too late for both. Samsung will ram through its proprietary 28 Ghz 5G technology as the 3GPP mmwave standard by June 2018.

As for AT&T, it must choose its vendors and technology roadmap wisely or risk falling behind the competition. Verizon chose wisely and has its 28 Ghz test network up and running already able to support mobile reception, while AT&T which bet on Ericsson doesn't even have a 28 Ghz network and have no idea when it will be ready.

KT, which is deploying the world's first 28 Ghz operational network at Pyeongchang, says dozens of carriers are observing KT's progress and are ready to commit to the technology if a successful demonstration is made in 2018.

Consequently, NTT Docomo sources were commenting to Japanese press that the 28 Ghz 5G alliance(Docomo, KT, SK Telecom, and Verizon) are urging AT&T to join them in an effort to avert a 5G format war and standardize 5G quickly enough to drop equipment prices for all. From Domoco's perspective, the real 5G rival is not Ericsson, but Huawei and ZTE peddling low-cost Chinese 5G format in Japan and in the US via Softbank/Sprint, and Huawei/ZTE making inload in Japan and in the US is considered a national security threat. Unlike the US, Japan has no hard/soft ban on Chinese equipment and Softbank has popularized Chinese telco equipment in Japan, even if Docomo itself tried to stay away from Chinese equipment at a great cost disadvantage.

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