>
New Topic
>
Reply<
Esato Forum Index
>
Sony Ericsson / Sony >
Technical
> Networks: 3g and 2.5g
Bookmark topic
Dont know if this has been discussed before, but wanted to know some info on these two different types of networks. If anyone can differentiate and can explain the difference.
thanks.
--
Posted: 2004-12-12 17:00:00
Edit :
Quote
Vineet, all i know is that we are using 2.5g currently! :-D But really, i would love to know the Main differences between the two.
This message was posted from a T230
--
Posted: 2004-12-12 17:06:45
Edit :
Quote
Yeah want to know the pros and cons of 3g over 2.5g networks.
This message was posted from a K700i
--
Posted: 2004-12-12 17:11:39
Edit :
Quote
The differences inlude:
1. 2.5g (GPRS) promises data speeds up to a theoretical 171kbps, while 3g (UMTS) promises much higher data speeds & capacity
2. 3g supports video calling; 2.5g does not
Those are the main differences, I think. They are both packet data platforms, so you can be billed according to data transferred or montly flat rates.
--
Posted: 2004-12-12 17:11:00
Edit :
Quote
At it's very basic... the only difference between 2.5 and 3G... or even 2 and 3G... is just faster data rates for 3G.
Now, what makes 3G such a big deal... is that the more data you can stream... the more services now become possible.
Kinda like 56K vs. Cable/DSL. you can't really STREAM video through 56K.. you kinda 'can'.. but it's very choppy... not enough headroom for error-correction... etc..etc... now, us techno geeks and early adopters can tolerate service like that since we understand the limitations of the technology... but the gerenal public doesn't. So when a provider claims "Video calls" and charges a lot of money for it... the gerenal public wants FLAWLESS video calls. Hence, providers must wait for 3G (or actually the upcoming 4G) before deploying additional services to the public.
Not because it isn't possible with 2 or 2.5G networks, but simply because it can't do it as well... or it needs patient subscribers.
Us early adopters got by with 56K Yahoo video conference with about a 2fps framerate way back... but now, people want full 30fps, or at the VERY least 15fps video calls on their mobile. You need a LOT of bandwidth to keep that frame rate consistent in the REAL world.
--
Posted: 2004-12-12 17:17:54
Edit :
Quote
Thx @jplacson!
This message was posted from a T230
--
Posted: 2004-12-12 17:22:14
Edit :
Quote
Well, technically speaking... GPRS is only counted as 2G. EDGE is 2.5G.
GPRS gives us about 53.6K data speeds... hitting about 33.6K realistically.
EDGE should hit about 384K MAX... I'm guessing around 128-256K realistic speeds.
--
Posted: 2004-12-12 17:25:35
Edit :
Quote
Ok great but what about EDGE on a 2.5g networks? It also provides higher data transfer rates.
This message was posted from a K700i
--
Posted: 2004-12-12 17:27:10
Edit :
Quote
@vineet: jcplacson just answered that
--
Posted: 2004-12-12 17:34:00
Edit :
Quote
Oh ok i was a bit late :-p
This message was posted from a K700i
--
Posted: 2004-12-12 17:36:56
Edit :
Quote
New Topic
Reply
