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PCingAl · 03-22-2007, 6:48 PM

So.. How does this work? To upgrade an existing network to support WCDMA (3g) is there a need to ADD hardware? Like RF equipment and the such on the antennae? Lately I've noticed many towers being serviced. On a few occasions I've witnessed what looks from my vantage point as tiny little men working on the antenna bars (those towers are bigger than I thought).. in different locations. Maybe one of the networks is just simply adding cell sites.. I'm curious to know, though, whether it might be a process associated with 3g upgrades. hmm

RadioRaiders · 04-13-2007, 6:07 AM

WCDMA is a completely different technology than GSM (altho it is "backward compatible" with GSM in that you can perform seamless handovers between both networks). So yes, Cingular needs to add all new hardware. In some cases they can still share the old GSM antennas, but in other cases new antennas will also be needed.

Gonz · 04-18-2007, 1:42 AM

So, do the new WCDMA phones actually prefer the WCDMA codecs for voice too? Or do they go for the GSM for voice, and the WCDMA for data? Are they converting 850 to WCDMA in most places and leaving the 1900 GSM?

RadioRaiders · 04-18-2007, 7:33 AM

Quote:

Originally Posted by Gonz

So, do the new WCDMA phones actually prefer the WCDMA codecs for voice too? Or do they go for the GSM for voice, and the WCDMA for data? Are they converting 850 to WCDMA in most places and leaving the 1900 GSM?

That all depends on what the operator wants to do!

In most cases in new networks, they set the network to make all WCDMA enabled phones to make ALL connections (voice and data) on the WCDMA network first, and fallback to GSM, since theres not much traffic in the new network.

In cases where the WCDMA network has congestion problems, they may set voice calls to go to GSM first and leave WCDMA for data primarily. But it's all up to the operator and their strategy at the moment. And you as the user shouldn't notice any difference in voice calls if it's on WCDMA or GSM (of course you'll notice a difference with data ;-))

Gonz · 04-18-2007, 1:58 PM

So, does WCDMA voice make interference such as that by GSM during transmission, or is it transparent (like CDMA)?

RadioRaiders · 04-18-2007, 2:41 PM

Quote:

Originally Posted by Gonz

So, does WCDMA voice make interference such as that by GSM during transmission, or is it transparent (like CDMA)?

I don't really understand your question, but WCDMA acts more like CDMA. In GSM each call gets it's own frequenc, but in WCDMA it's spread throughout the whole bandwidth, so it's actually more susceptible to interference, especially in crowded networks. With GSM networks, if it has a well made frequency plan, interference is less of an issue.

Gonz · 04-24-2007, 10:47 PM

I think my question was misunderstood. The scenario is that GSM interferes with VHF or FM when the phone is in operation, as TDMA did also. My question is, does WCDMA, like CDMA, not have this drawback? Has anyone used it to know?

rirwin · 05-17-2007, 1:38 PM

Quote:

Originally Posted by Gonz

I think my question was misunderstood. The scenario is that GSM interferes with VHF or FM when the phone is in operation, as TDMA did also. My question is, does WCDMA, like CDMA, not have this drawback? Has anyone used it to know?

CDMA does not have the "pulse" or "clickin" noise that is herd from GSM/TDMA phones when near TV speakers and the such.

strunke · 05-18-2007, 12:13 AM

WCDMA will not have the pulse or clicking problem. The wonderful world of CDMA!

03-22-2007, 6:48 PM	#1 (permalink)
PCingAl Fresh Member Join Date: Dec 2005 Location: Charleston, SC Posts: 42 Thanks: 0 Thanked 0 Times in 0 Posts	3G- New equipment So.. How does this work? To upgrade an existing network to support WCDMA (3g) is there a need to ADD hardware? Like RF equipment and the such on the antennae? Lately I've noticed many towers being serviced. On a few occasions I've witnessed what looks from my vantage point as tiny little men working on the antenna bars (those towers are bigger than I thought).. in different locations. Maybe one of the networks is just simply adding cell sites.. I'm curious to know, though, whether it might be a process associated with 3g upgrades. hmm

04-13-2007, 6:07 AM	#2 (permalink)
RadioRaiders Telecom Evangelist Join Date: Apr 2007 Location: Undisclosed Posts: 941 Provider(s): GSM / WCDMA Thanks: 3 Thanked 12 Times in 8 Posts	Re: 3G- New equipment WCDMA is a completely different technology than GSM (altho it is "backward compatible" with GSM in that you can perform seamless handovers between both networks). So yes, Cingular needs to add all new hardware. In some cases they can still share the old GSM antennas, but in other cases new antennas will also be needed.

04-18-2007, 1:42 AM	#3 (permalink)
Gonz Join Date: Oct 2002 Location: Southern Wisconsin Posts: 537 Phone(s): USCC Nokia 6235i, USCC Nokia 6255i Provider(s): USCC, American Roaming Network... LOL Thanks: 0 Thanked 0 Times in 0 Posts Images: 3	Re: 3G- New equipment So, do the new WCDMA phones actually prefer the WCDMA codecs for voice too? Or do they go for the GSM for voice, and the WCDMA for data? Are they converting 850 to WCDMA in most places and leaving the 1900 GSM?

04-18-2007, 1:58 PM	#5 (permalink)
Gonz Join Date: Oct 2002 Location: Southern Wisconsin Posts: 537 Phone(s): USCC Nokia 6235i, USCC Nokia 6255i Provider(s): USCC, American Roaming Network... LOL Thanks: 0 Thanked 0 Times in 0 Posts Images: 3	Re: 3G- New equipment So, does WCDMA voice make interference such as that by GSM during transmission, or is it transparent (like CDMA)?

04-24-2007, 10:47 PM	#7 (permalink)
Gonz Join Date: Oct 2002 Location: Southern Wisconsin Posts: 537 Phone(s): USCC Nokia 6235i, USCC Nokia 6255i Provider(s): USCC, American Roaming Network... LOL Thanks: 0 Thanked 0 Times in 0 Posts Images: 3	Re: 3G- New equipment I think my question was misunderstood. The scenario is that GSM interferes with VHF or FM when the phone is in operation, as TDMA did also. My question is, does WCDMA, like CDMA, not have this drawback? Has anyone used it to know?

05-18-2007, 12:13 AM	#9 (permalink)
strunke .:\|Always Covered\|:. Join Date: May 2005 Location: BVR Posts: 1,710 Phone(s): KRZR K1m, SLVR L6, v710, E815, E816(ampd), LG 380, 8600 Provider(s): Alltel, T-Mobile, Sprint, Centennial Devices: Garmin eTrex Vista Cx, Bluetooth headset Thanks: 1 Thanked 6 Times in 5 Posts My Auctions	Re: 3G- New equipment WCDMA will not have the pulse or clicking problem. The wonderful world of CDMA! __________________ www.ALLTELLIVES.com My words of wisdom and random thoughts....Doesn't matter how many people are on a network, you can only use one phone at a time...ok maybe two...

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