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Mobile WiMax Standard Approved

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UMTS/HSPDA/EVDO begone!

muchdrama

Dec 8, 2005, 2:30 PM
I'm assuming WiMax is being groomed to replaced all of these technologies?
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cellularman2006

Dec 8, 2005, 3:21 PM
👿 😡
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mistermarler

Dec 8, 2005, 10:24 PM
i would be so overjoyous my face would explode into a plethora of rainbows. a new american standard. take that china and japan.
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Bugwart

Dec 10, 2005, 2:45 PM
IEEE is an international organization. That is what the "I" stands for.
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scbysnx

Dec 9, 2005, 12:11 AM
Thats the hope but I don't see it totally happening.. cingular has committed to the 3GSM and verizon has pretty much committed to qualcomm's cdma standard. The variables are sprint.. which apparently just tested (it doesn't seem they've committed) Qualcomms UI which I would assume would hinder their move to a non qualcomm product. We have to remember that sprint and nextel have now merged and nextel was willing to try flash ofdm and then abandon it so they obviously are willing to discover new technologies.. but they seem to be the only one and it remains to be seen if sprint will adopt that strategy
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tropicalhaven

Dec 11, 2005, 11:34 AM
Flarion was acquired or is being acquired by Qualcomm, so Flash OFDM is now a or will soon be a Qualcomm product.
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viper

Dec 9, 2005, 10:42 AM
In the US the carrier to watch is sprint-nextel who must do something with that MMDS spectrum they have covering 80% of US residents within four years. It is a condition of their merger.

That four year deadline strongly suggests that they'll do UMTS TDD (IP Wireless) or FLASH-OFDM because both of those work now. Of those only Flash ofdm offers proven mobility and proven mobile voip so I'd guess FLASH-OFDM.

In europe the one to watch is T-mobile who has deployed UMTS TDD and FLASH-OFDM in some of their eastern european markets.

Keep in mind also that all of these standards are approaching the limit on capacity over an airlink as defined by shannon's law. The relative capacity of OFDM vs. cdma is going to depend heavily on the partic...
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nextel18

Dec 9, 2005, 10:53 AM
well thought out answer..

i also like the idea of a ofdm/ev-do type handset (or something of that variety), especially since my beloved qualcomm bought out flarion.

it is quite funny how the fcc is making sprint/nextel deploy technology in that 2.5ghz band. those were the easiest "conditions" (if you want to even call them that) i have ever seen a regulatory body do especially in the wireless industry.

the conditions were as follows;

deploy technologies on their 2.5ghz spectrum over 4 years offering service to AT LEAST 15 million people and then cover 30 million in 6 years.
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viper

Dec 9, 2005, 11:00 AM
"deploy technologies on their 2.5ghz spectrum over 4 years offering service to AT LEAST 15 million people and then cover 30 million in 6 years."

Is that it? Hmm. I'm still skeptical about wimax and sprint and wimax and anyone else but you could cover 15 million people pretty quickly and for less than murderous cost by deploying in NYC (five burrows).
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nextel18

Dec 9, 2005, 11:12 AM
yep, those are the only "conditions" that they must do. they are under the spectrum cap and in market share.

yea, i am a bit skeptical of wimax myself, becuase no one knows if its a proven technology even though Intel, one of the best companies in the world, is backing it. i think flarion's ofdm flexband and perhaps td-cdma will probably be picked over wimax.

remember, it depends how wimax does 1. in trials and 2. in a test market. till then, we wont know how it will perform.

15 million people in 4 years and 30 million in 6 is quite easy especially when they cover 80 percent of the country (population).

yea, that is true, the costs wont be that much either becuase they would have to overlay the spectrum and have radios on the ...
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viper

Dec 9, 2005, 11:23 AM
I have considerable doubts about performance of wimax. Mobility is very difficult to do efficiently and with high QoS. Add VoIP to the mix and it just gets tougher. There several amendments to the fixed version of wimax (802.16d). I think we'll see the same for 802.16e and even then i am skeptical.

FLASH-OFDM has frequency hoping on top of ofdm and that might make the real difference. Traditional OFDMA means lots and lots of tones (transmissions) which will inevitably interfere with one another.

The people who drafted that 802.16e have, for the most part, never written a mobile standard. A lot of them were wifi and fixed wireless guys.

I am very curious about the 802.20 standard because word has it that qualcomm is going to for s...
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nextel18

Dec 9, 2005, 11:31 AM
very true.. 🙂

so if it was from td-cdma, ofdm, and wimax which one would you choose and why?
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viper

Dec 9, 2005, 12:35 PM
My money would be on flash-ofdm but i would not rule out super 3g (umts long term evolution)or 802.16e in the future. They might have something five years from now. UMTS TDD (ip wireless) looks like they'll score some nice contracts as well.

I doubt td-scdma will gain traction outside of china. The official version, which is the one all the major vendors support, uses the same expensive, proprietary and IP unfriendly core network as wcdma. No one wants that.

The IP version, as offered by navini, offers dubious mobility and it is proprietary.

The only thing missing from flash-ofdm is the standardization issue. Qualcomm will standardize it via 3GPP2. That is a sure bet but neither 3GPP2 nor 3GPP (who define umts) are really open stan...
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Bugwart

Dec 10, 2005, 2:52 PM
Everyone posting here seems to think that WiMAX will only succeed if it is adopted by one of the major cellular companies. I would question why they would need to be involved? To install infrastructure? Why?

WiFi is a success because people use it. WiMAX will be a success for the same reason.
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viper

Dec 11, 2005, 11:02 AM
Bugwart said:
Everyone posting here seems to think that WiMAX will only succeed if it is adopted by one of the major cellular companies. I would question why they would need to be involved? To install infrastructure? Why?

WiFi is a success because people use it. WiMAX will be a success for the same reason.


Wifi is cheap and it operates in unlicensed 2.4 GHz and often unlicensed 5-6 GHz spectrum.Its mainly in 2.4.

WiMAX will certify product at 2.5, 3.5, and 5.8 GHz. Of those bands only 5.8 is unlicensed and 5.8 is poor band for outdoor networks because range is somewhat limited.

By definition, 2.5 and 3.5 will need to be deployed by a carrier who owns said spectrum. No one cares about 3.5 GHz beca...
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nextel18

Dec 13, 2005, 11:31 AM
well said. 🙂
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