3g?

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#14979 24-May-2005 11:02

I understand the concept, but I have had many reported speeds on EVDO that were not multiples of the values you have indicated. Am i just being reported averages, or am i missing something here?

1x - why does everyone report 153k as being max speed if its actually capable of more? (makes me want to climb a tower in the middle of a rural area at 3am and see if i can get 163k out of it....)

Jama

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#14986 24-May-2005 12:36

You are being reported averages for EVDO.

1x - I wouldn't recommend climbing a tower at 3am but I know what you mean. Not sure why it is only reported as having a 153kbps max.

Why does the GSM world say that GPRS is capable of speeds up to 171kbps when there is no way in hell you will ever get near that speed?

tonyhughes

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#14988 24-May-2005 13:35

To be honest I dont see GPRS max speed advertised (I didnt even know what the max speed was).

I regularly get around 30 - 35kbps on GPRS.

Telecom has touted 1x's max speed quite a bit, and under promised a 40-80kbps average, and over delivered (for most people i know) an average of 90-120kbps.

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#14989 24-May-2005 13:37

You are such a stick-in-the-mud Jama - Give me 974 good reasons why I shouldnt go climbing towers at 3am? ;-P

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#14991 24-May-2005 13:53

Disenchanted: I regularly get around 30 - 35kbps on GPRS.

Which is ok for ActiveSync or other forms of push e-mail... But try working while away...

For example I was in Queenstown for a full week for a conference (oh, hard work, I know), and my Harrier Pocket PC was disconnected (it was a demo, still not sorted). Used wireless LAN during the day in the conference rooms, but what a pain to try even replying an e-mail through Exchange OWA on GPRS...

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tonyhughes

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#14992 24-May-2005 14:10

Absolutely. My GPRS connection is only for testing purposes. I use EVDO / 1x for everything else, although I would like to see much more wifi access in the regions.

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#15006 25-May-2005 00:05

Using terminal services (think VNC or RDP) over GPRS....

Data rate was semi-ok for RDP, but the latency was awful. I now just have a dialup account that I use for those 'remote' tasks.

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#15048 26-May-2005 11:17

Hmm -
I wonder how EVDO performance compares with UMTS TDD
(technology Woosh wireless uses).

I'm getting about 80-110ms latency with Woosh
in a good coverage area on a business plan -
with 340-400kbps bandwidth in an OK coverage area.

150-250ms latency in poor coverage areas.

I've heard about performance drops with T3G when the
network is under heavy load.

Should be interesting when BCL eventually launches Wimax
when it becomes available - looks like it will
outperform most of these 3g technologies.

Jama

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#15052 26-May-2005 11:26

Most important difference between Woosh and EVDO is mobility. I have been in a taxi from Auckland airport to the city and had uninterrupted performance at 600kbps average. Cellsite handover is awesome.

Here is some latency figures:
EVDO Rel 0 - 80 to 120ms (Telecom current)
EVDO Rev A - 30 to 50ms (next possible Telecom upgrade)
WCDMA R99 - 120 to 150ms (what Voda are launching)
HSDPA - 100 to 120ms (Voda trialling this later on)
HSUPA - 90 to 100ms (higher uplink speed - extension of HSDPA)

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#15053 26-May-2005 11:40

That's pretty good!

EVDO Rev A - 30-50ms
that will be very good.

If your getting 600kbps in a mobile environment -
that's very good performance.

I imagine bandwidth and latency increases when
you are on the move, rather than being stationary.

Well if other wireless providers increase their coverage (I believe Woosh
are going to increase the coverage in Auckland).

It at least will provide some competition and hopefully the price
and data caps will improve.

I have heard that US provider Sprint use EVDO and that have something like $80
a month for quite a generous data cap.

tonyhughes

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#15085 27-May-2005 17:46

>> I imagine bandwidth and latency increases when
>> you are on the move, rather than being stationary.

Dunno about latency - I have had a Megabit on a Sierra card on the Auckland motorway at 100kmh (as a passenger!!)

>> Well if other wireless providers increase their coverage (I believe Woosh
>> are going to increase the coverage in Auckland).
>> It at least will provide some competition and hopefully the price
>> and data caps will improve.

It most certainly will mean that. All it can do is improve (it has improved lots lately anyway, but there is still a way to go)

>> I have heard that US provider Sprint use EVDO and that have
>> something like $80 a month for quite a generous data cap.

I have read of $50US for unlimited CDMA data (not sure if 1x or EVDO). - largely I guess that in the cities there, there are far more users in a given area than in NZ which has got to make it far cheaper to deliver these services than if the user base was more widely spread.

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#15087 27-May-2005 17:55

Disenchanted you are exactly right. The more people using the network in a smaller area the lower the cost. Where as here you have 4M people and a land area the size of the UK. To give you an idea of the difference - to terminate data off the cellular network Telecom have 2 x PDSN's (Packet Data Serving Nodes) for the whole of NZ. Washington in the US has 14 x PDSN's. It's all about economies of scale.

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#15088 27-May-2005 20:41

Maybe this is common knowledge but I have heard from reliable source that Telecom will launch full national EV-DO coverage in July, i.e. equivalent to current 1X coverage.

Funny, that's around the same time that Vodafone will launch their 3G.

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#15106 28-May-2005 20:52

You can get 10 hours of EV-DO usage on the Telstra network in oz for A$29 per month or A$49 for 20 hours. How about Telecom launching something like this before we get excited about flat rate!!

Jama

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#15124 30-May-2005 12:20

sbiddle - You can't assume just because Telstra offer a certain price point for EVDO that Telecom can do the same. Telstra use EVDO to provide broadband into locations where ADSL would not be technically possible. This is a mandate from the Aussie government. Therefore Telstra use EVDO to extend and compliment their existing broadband offerings. Telecom on the other hand can reach over 92% of the NZ population with ADSL. Offering 'flat rate' EVDO would cannibalise ADSL and when you have invested a few $100M on ADSL why would you do that?

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