EV-DO vs. WCDMA
It is not about the speed.
why does wcdma run on three different frequencies worldwide? 2100, 1900 and 850? so, how is 2100 wcdma phone backwards compatible with 900/1800 european networks? this will create a new wave of multiband phones...
as far as i understand EVDO runs on the same frequencies (cellphone and pcs?) just requires a dedicated slice of spectrum. so it is fully compatible with 1xrtt.
I am confused %)
why does wcdma run on three different frequencies worldwide? 2100, 1900 and 850? so, how is 2100 wcdma phone backwards compatible with 900/1800 european networks? this will create a new wave of multiband phones...
as far as i understand EVDO runs on the same frequencies (cellphone and pcs?) just requires a dedicated slice of spectrum. so it is fully compatible with 1xrtt.
I am confused %)
...
Multi band phones are not a problem. Even on the CDMA side our phones do both 850MHZ and 1900MHZ. Verizon, USCC and others use both bands. It does add some complexity when you add both code division and time division digital schemes on the same phone but it seems to work O.K. There will be some rollout issues in Europe, but the biggest surprise is the take rate on 3G in Europe. Europeans have been a bit slow on the draw to adopt the new standard. There are serious questions now about whether or not UMTS will be able to pay for itself as quickly as was originally believed.
...
"There are serious questions now about whether or not UMTS will be able to pay for itself as quickly as was originally believed. " this is the big problem. no one knows if that will turn out well, but we know that CDMA ev-do rev o and REV A will be very fast and good.
...
so the new international gsm/wcdma phone has to be 800/850/1800/1900/2100 compatible? evdo runs on cellular or pcs (i forgot witch one)... why invent a bicycle?
...
Don't forget GSM 900. EVDO will run on 800/850MHZ, 1900MHZ and 450MHZ. The multi-band phones are not really a problem. They work pretty flawlessly now. The biggest problem seems to be selling people on a new phone/technology that they may not see immediate value to owning.
...
but it would be better running on 1.9ghz as opposed to 800/850 or 450mhz becuase the 800/850 and 450mhz i think are crowded and the 1.9ghz isnt that much. if you could run DO on 800 mhz why would verizon be buying 1.9ghz spectrum? doesnt make sense to me.
1.9ghz will work better then the others.
1.9ghz will work better then the others.
...
Verizon is buying 1900MHZ spectrum because there is no 850 MHZ spectrum available. 1900MHZ is slightly better for data but it does not penetrate as well as 800/850MHZ. It also requires 2-4 times the amount of 1900MHZ towers to do the work of 1 800/850MHZ tower.
...
450 MHz isn't available for cellular use in the U.S., so that's irrelevant.
850 spectrum is all "taken", and mostly "full", but not in all areas.
Verizon has been buying 1900 spectrum simply because they need more spectrum in general, and 1900 is all that's been available lately.
I'm pretty sure that Verizon is deploying EV-DO on both bands. Even though they've been acquiring a lot of 1900 recently, that's all very new, and historically their network is mostly 850.
I don't think they could have deployed EV-DO in as many cities as they have without using 850 spectrum. I'd have to dig to find specific cities where they don't have 1900 spectrum but have deployed EV-DO, but I believe they exist.
850 spectrum is all "taken", and mostly "full", but not in all areas.
Verizon has been buying 1900 spectrum simply because they need more spectrum in general, and 1900 is all that's been available lately.
I'm pretty sure that Verizon is deploying EV-DO on both bands. Even though they've been acquiring a lot of 1900 recently, that's all very new, and historically their network is mostly 850.
I don't think they could have deployed EV-DO in as many cities as they have without using 850 spectrum. I'd have to dig to find specific cities where they don't have 1900 spectrum but have deployed EV-DO, but I believe they exist.
...
" I'd have to dig to find specific cities where they don't have 1900 spectrum but have deployed EV-DO, but I believe they exist."
thanks.
"I'm pretty sure that Verizon is deploying EV-DO on both bands. Even though they've been acquiring a lot of 1900 recently, that's all very new, and historically their network is mostly 850."
it seems like when i was searching they would buy that spectrum for data and for enhancing and expanding their coverage and capacity in those areas. seems logical.
why dont they just launch their DO system nationwide already? why the pausing?
thanks.
"I'm pretty sure that Verizon is deploying EV-DO on both bands. Even though they've been acquiring a lot of 1900 recently, that's all very new, and historically their network is mostly 850."
it seems like when i was searching they would buy that spectrum for data and for enhancing and expanding their coverage and capacity in those areas. seems logical.
why dont they just launch their DO system nationwide already? why the pausing?
...
nextel18 said:
...why dont they just launch their DO system nationwide already? why the pausing?
Simply because it takes a lot of work. Verizon has thousands of towers, and each one needs to have new equipment physically installed for EV-DO, and that equipment needs to be tested and fine-tuned. It's time-consuming and expensive. Verizon only has so many engineers to travel around and do these upgrades, and they can only work so fast.
...
ahh i see. i thought they would just roll it out all at once. (doesnt sprint pcs do that? i mean roll it out all at once)
...
I was told by tech support that it is just software not actually physical parts,
...
Tech Support was WRONG!!!! There are definately physical parts that need to be installed on each tower in order to make EV-DO work. I actually witnessed the modifications being made to a tower close to my house.
...
"so the new international gsm/wcdma phone has to be 800/850/1800/1900/2100 compatible?"
not exactly sure, but that sounds right. it would probably be like 800/850, 1800/1900 and then 2100 so probably a quad or tri mode phone.
ev-do runs on i belive pcs spectrum. (not 100 percent sure on that)
not exactly sure, but that sounds right. it would probably be like 800/850, 1800/1900 and then 2100 so probably a quad or tri mode phone.
ev-do runs on i belive pcs spectrum. (not 100 percent sure on that)
...
SPCSVZWJeff said:
Multi band phones are not a problem. Even on the CDMA side our phones do both 850MHZ and 1900MHZ. Verizon, USCC and others use both bands. It does add some complexity when you add both code division and time division digital schemes on the same phone but it seems to work O.K. There will be some rollout issues in Europe, but the biggest surprise is the take rate on 3G in Europe. Europeans have been a bit slow on the draw to adopt the new standard. There are serious questions now about whether or not UMTS will be able to pay for itself as quickly as was originally believed.
According to who?
Vodaphone isn't reporting anything like that. Neither is NTT DoCoMo.
Personally, I can't wait to ...
(continues)
...
Wireless week. They merely pointed out that Europeans are moving from GSM to 3G at a much slower rate than anticipated. The article also stated that data use in the United States is far below anticipations on all platforms.
I hope I didn't imply that Europeans were not buying UMTS, they are, just not at the rate that had been originally anticipated when the carriers began building out UMTS. This will lengthen the period in which they get a total return on their investment beyond original estimates.
If it's any consolation Verizon is experiencing the same thing with EVDO. Take rates are below expectations.
I hope I didn't imply that Europeans were not buying UMTS, they are, just not at the rate that had been originally anticipated when the carriers began building out UMTS. This will lengthen the period in which they get a total return on their investment beyond original estimates.
If it's any consolation Verizon is experiencing the same thing with EVDO. Take rates are below expectations.
...
SPCSVZWJeff said:
Wireless week. They merely pointed out that Europeans are moving from GSM to 3G at a much slower rate than anticipated. The article also stated that data use in the United States is far below anticipations on all platforms.
I hope I didn't imply that Europeans were not buying UMTS, they are, just not at the rate that had been originally anticipated when the carriers began building out UMTS. This will lengthen the period in which they get a total return on their investment beyond original estimates.
If it's any consolation Verizon is experiencing the same thing with EVDO. Take rates are below expectations.
I bet Japan is moving faster than europe. I can see why not many people would ju...
(continues)
...
UMTS has not been without its problems in Japan, either. Take rates have been below expectations there as well. DoCoMo has even lost some customers to KDDI because of UMTS. All of those initial issues have been ironed out and still there is not the migration that was anticipated. One reason could be the price of the handsets. In Europe there are no handset subsidies so the handsets are extremely expensive. If the European consumers only see a marginal advantage (I'm talking about perceptions and not actual advantages) then they won't be justifying paying the high price for a slightly more feature laden handset.
Maybe they need some American marketing techniques like handset subsidies.
Maybe they need some American marketing techniques like handset subsidies.
...
I will concur with that. Being European myself, we brits use our phones for talking. And we don't necessarily need 3G for that. We have a fantastic network wherever we go and our phones are the dogs ballocks compared to the tossers ya got here. The biggest thing we would like to see is video talk... and that will require UMTS... but we won't waste our money if it don't work.
...
kvazzz said:
It is not about the speed.
why does wcdma run on three different frequencies worldwide? 2100, 1900 and 850? so, how is 2100 wcdma phone backwards compatible with 900/1800 european networks? this will create a new wave of multiband phones...
as far as i understand EVDO runs on the same frequencies (cellphone and pcs?) just requires a dedicated slice of spectrum. so it is fully compatible with 1xrtt.
I am confused %)
The 2100 band is regulated by the EU. It's a totally dedicated band for UMTS. The backwards compatibility comes from the multi-radio handset as you said. The gsm radios are 800/900/1800/1900. UMTS is 2100, but only in Europe and Japan. Cingular is doing it "inband", meaning they...
(continues)
...
I would agree with you on this. From everything I have been able to read there is not much difference in the capabilities of the two technologies.
...
With the issues you're asking about, WCDMA vs GSM is not really that different from EV-DO vs standard CDMA.
2100 only applies to Europe and Asia. Basically, their 900 and 1800 bands are "full" with GSM users, so they set aside a new band for WCDMA (UMTS). Yes, WCDMA phones for Europe and Asia have an extra band just for that technology.
But in the U.S., we don't have an extra band for WCDMA just yet, and carriers like Cingular have enough spectrum that they don't need the extra band (although this is only because they acquired ATTWS).
So Cingular is deploying WCDMA in the 800(850) / 1900 spectrum they have already, just like Verizon is doing with EV-DO. In both situations, the 3G technology has to be in its own separate slice of fre...
(continues)
2100 only applies to Europe and Asia. Basically, their 900 and 1800 bands are "full" with GSM users, so they set aside a new band for WCDMA (UMTS). Yes, WCDMA phones for Europe and Asia have an extra band just for that technology.
But in the U.S., we don't have an extra band for WCDMA just yet, and carriers like Cingular have enough spectrum that they don't need the extra band (although this is only because they acquired ATTWS).
So Cingular is deploying WCDMA in the 800(850) / 1900 spectrum they have already, just like Verizon is doing with EV-DO. In both situations, the 3G technology has to be in its own separate slice of fre...
(continues)
...
Thanks Rich! 🙂
Should we expect Vz launching EV-DO rev A any time soon? I kinda like the idea of having a videophone.
To everybody else: Hey, we CAN talk about technology on this forum! Simply amazing! 😎
Should we expect Vz launching EV-DO rev A any time soon? I kinda like the idea of having a videophone.
To everybody else: Hey, we CAN talk about technology on this forum! Simply amazing! 😎
...
i dont think verizon would be launching DO REV A soon, becuase they just started to go to REV O. i am not sure if you have to pay extra for REV A, however, on qualcomm's web site it does say you need newer chips, i think.
sprint would be doing REV A, and i belive they said they would be rolling it out from 2006-2008. (something like that)
by the way when i was searching i found this... http://www.3g.co.uk/PR/March2005/1204.htm
Nortel is planning live market trials with Verizon Wireless beginning in 2006. (we will see if that happens)
my question is that why didnt verizon just go to REV A instead of starting with REV O, just like sprint is doing? maybe you can answer that or maybe rich can too.
hope that helps...
hope that...
(continues)
sprint would be doing REV A, and i belive they said they would be rolling it out from 2006-2008. (something like that)
by the way when i was searching i found this... http://www.3g.co.uk/PR/March2005/1204.htm
Nortel is planning live market trials with Verizon Wireless beginning in 2006. (we will see if that happens)
my question is that why didnt verizon just go to REV A instead of starting with REV O, just like sprint is doing? maybe you can answer that or maybe rich can too.
hope that helps...
hope that...
(continues)
...
