Excellent explanation about what is 3G and 4G, speed of the download and different generation of wireless technologies by Craig Mathias.
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Really interesting, but I do not agree about EDGE being 3G.
From my knowledge GPRS is 2G and EDGE is 2.5G
Hi Liviu! I know the same but look here:
“2.5G provides some of the benefits of 3G (e.g. it is packet-switched) and can use some of the existing 2G infrastructure in GSM and CDMA networks. GPRS is a 2.5G technology used by GSM operators. Some protocols, such as EDGE for GSM and CDMA2000 1x-RTT for CDMA, can qualify as “3G” services (because they have a data rate of above 144 kbit/s), but are considered by most to be 2.5G services (or 2.75G which sounds even more sophisticated) because they are several times slower than “true” 3G services.”
http://en.wikipedia.org/wiki/2.5G
I believe that based on this topic you can start a never ending discussion (e.g. Windows vs. Linux
)
Thanks for comment!
this is jack
Man, I will watch anything Craig Mathias puts out…super helpful.
thanks!
Disagree about EDGE.
2.5 G GPRS
2.75 EDGE
3G UMTS
3.5G HSPA
3.75G IMS
4G LTE
shut the fuck up
Super helpful ! thanks Craig
What is the reason for delay in implementing 3G and 4G Mobile services?
A nice overview of the mobile generations (from 1st to 4th):
http://www.nil.com/ipcorner/FirstMileWireless/
In my opinon the big difference is as follows:
The 3 G used in WCDMA
up to 5 Mhz as bandwhith whith only one frequency ( Indeed we have 2
one for Uplink sense and the other is for the Downlink one)
But the 3 g is
interferences and noise sensitive meaning lowering capacity si our system
is affected by noises
The 4 G on LTE uses several sub carriers for some reasons like a way to fight some selectve interfrences affecting some frequencies we can cancel temporarily in one hand and in oher other
we can also by serial to parallel change of the data before IFFT modulation to enlarge the duration of the symbol in order to prevent Intersymbol interferences
The subcarriers ‘s choice is made deliberatly by time symbol as separation for the same goal
THANKYOU GOOGLE VERY GOOD EXPELING ABOUT 3G/4G
Great post really useful article. We should get back to this site later to check some of other blogposts. Thanks!
Superior document, thank you!
What a wonderful explanation of the generational evolution of cell phone technologies! Who would have thought a few years ago that VoIP would fold into 4G? Thanks for this great presentation!