CDMA vs 3g in OZ

Emjaye wrote:
> I've not heard that being mentioned in respect to the CDMA replacement
> 3G service, nor have I seen it refered to in the current GSM service.
> So, where DOES this 2100 Mhz frequency come from?

GSM operates at several different frequencies-

850MHz
900MHz
1800MHz
1900MHz

(also strage stuff like 450MHz as well- but that's pretty rare).

In Australia we only use two bands- 900 and 1800.

W-CDMA operates at several different bands as well-

850MHz
1900MHz
2100MHz

(again- also at other bands- but these are the main ones). As an
example- you can run W-CDMA in the 900MHz band. Operators like Voda and
Optus are no doubt looking into this as an option.

In Australia 2100MHz is the main band that all the operators bought
several years ago. Telstra is pulling out their 850MHz CDMA network and
replacing it with a W-CDMA. (Don't get confused by the fact that they
both have the term CDMA in them- they are completely different).

I hope that makes sense? Does it answer the question?

Fred

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› See More: CDMA vs 3g in OZ

Emjaye wrote:

> So, where DOES this 2100 Mhz frequency come from?

Just as the case of GSM and 900 MHZ, from the initial
development and deployment of UMTS in Europe.

John

John Henderson wrote:

> Correct me if I'm wrong, but this involves a disconnection and
> redial rather than a handover - not the end of the world, but
> inconvenient.

On the Optus/Vodafone UMTS network, I frequently get handovers from UMTS
to GSM900/1800, without a dropped call yet. I'm still not sure why it
happens so frequently (even when in good UMTS coverage areas), but at
least it's seamless.

"John Henderson" <[email protected]> wrote in message
news:[email protected]...
> Michael wrote:
>
> > No, they dont need to be dual band, they can certainly be 3G
> > 850 and fall back to GSM.
>
> Correct me if I'm wrong, but this involves a disconnection and
> redial rather than a handover - not the end of the world, but
> inconvenient.

Nope

> > It would be highly advantageous to do 3G 850 / 3G 2100 and
> > GSM900 (and 1800 even) on the one handset.
>
> Plus 1900 MHz UMTS for those trips to the Americas.

**** that, they should get a real frequency or **** off

<[email protected]> wrote in message
news:[email protected]...
>
> > Correct me if I'm wrong, but this involves a disconnection and
> > redial rather than a handover - not the end of the world, but
> > inconvenient.
>
> Handover from 3G to GSM is possible and completely functional- and the
> vice versa is also true.
>
> You may be thinking of the case of "3" and then dropping before
> reselecting to Telstra (or Voda previously). This was because it was a
> roaming partner issue - not a technical issue.
>
> There are several phone coming out soon that will operate at 850, 1900
> and 2100 for 3G as well as 900, 1800 and 1900 for GSM and allow for
> seamless handoffs between all bands. There is little doubt that this
> will be norm in phones in a couple of years (just was the case with
> dualband and triband phones for GSM in recent years).

and yet Roddles claimed there would be no handsets and therefore the network
wouldnt fly
>
> Fred
>

>
> and yet Roddles claimed there would be no handsets and therefore the network
> wouldnt fly
>

eh?

There are lot of W-CDMA handsets available now that operate at 850MHz.
Basically anything that Cingular (3G) sell in the US is 850.

The question is whether Telstra launch with handsets like this or wait
for ones that operate at both 850 and 2100.

In a lot of ways its a mute point because the network won't be ready
for several months, and by then handsets that operate at both 850 and
2100 will be more common.

Fred

Michael <[email protected]> wrote:
> <[email protected]> wrote in message
> news:[email protected]...
>>
>>> Correct me if I'm wrong, but this involves a disconnection and
>>> redial rather than a handover - not the end of the world, but
>>> inconvenient.
>>
>> Handover from 3G to GSM is possible and completely functional- and
>> the vice versa is also true.
>>
>> You may be thinking of the case of "3" and then dropping before
>> reselecting to Telstra (or Voda previously). This was because it was
>> a roaming partner issue - not a technical issue.
>>
>> There are several phone coming out soon that will operate at 850,
>> 1900 and 2100 for 3G as well as 900, 1800 and 1900 for GSM and allow
>> for seamless handoffs between all bands. There is little doubt that
>> this will be norm in phones in a couple of years (just was the case
>> with dualband and triband phones for GSM in recent years).

> and yet Roddles claimed there would be no handsets

Lie.

> and therefore the network wouldnt fly

Lie.

I've been coming and going from the forum for several years now- and
I'm starting to remember why I typically leave after a few days-
because there is so much *****iness in this group. What are you people?
12 year olds?

I (for one) come here to try and learn some things and maybe help
people out if I have an answer. I'm not going to get roped into a flame
war- so if anyone can suggest different forum that focuses on aus
mobile topics- can you post a link here. It might be time to move on
again....

Fred.

[email protected] wrote:

> I've been coming and going from the forum for several years now- and
> I'm starting to remember why I typically leave after a few days-
> because there is so much *****iness in this group. What are you
> people? 12 year olds?

Old enough to be your father in my case quite likely thanks.

> I (for one) come here to try and learn some things and maybe help
> people out if I have an answer. I'm not going to get roped into a
> flame war- so if anyone can suggest different forum that focuses on
> aus mobile topics- can you post a link here. It might be time to move
> on again....

Dont let the door hit you on your arse.

Graeme said....

> Telstra are now building their 850 mhz network. I've been told by

A local tech who is a friend of ours, told us the other night that it's
already been built (he is one of the contractors involved in its
installation and commissioning) and is ready to go. It's just sitting
there, waiting for higher authorities to sign off on it.

Probably waiting to see if anyone is going to supply the phones to
connect to it.

"Emjaye" <[email protected]> wrote in message
news:[email protected]...
> Graeme said....
>
> > Telstra are now building their 850 mhz network. I've been told by
>
> A local tech who is a friend of ours, told us the other night that it's
> already been built (he is one of the contractors involved in its
> installation and commissioning) and is ready to go. It's just sitting
> there, waiting for higher authorities to sign off on it.

No, not all the BTSes are complete

> Probably waiting to see if anyone is going to supply the phones to
> connect to it.

Nope. Build it, and the handsets will come
>

Michael said....

>> Why couldn't they simply build ONE network with ONE standard in
>> operation? What's wrong with swapping the GSM service for this new one.
>> Get rid of CDMA and GSM and just go with the one service?
>
> You just dont understand, do you?

I don't claim to be an "expert" on such matters. You, on the other hand
profess to do so, and your somewhat condescending attitude towards those
who really couldn't give a flying **** about how the mobile phone system
works really illustrates that you don't have much of a life.

Sure, if you're in the business of flogging the damn things, then yeah,
I s'pose that you would get your jollies, flogging yourself whenever a
new mobile phone is released. The rest of us merely want to know what we
need to do with regards to changing technologies, and perhaps most
importantly, what the coverage will be like and what it will cost us.