[citation][nom]dredg98[/nom]Wireless Carriers should improve there networks instead of making them faster no NEEDS 4g WE NEED BETTER NETWORKS![/citation]
First lets establish something:
US carriers suck. (Cant speak for the EU, never even been there much less used their cell service)
That said, lets go into some technical details...
ALL cellular providers operate inside a very NARROW frequency allocation, pretty much world wide.
lets eyeball AT&T / Verizon
They BOTH operate in these ranges:
Range1: 869.00 Mhz - 894.567Mhz (Dominant in rural areas)
Range defined as: 850
Range2: 1930.00 Mhz - 1990.00 Mhz (Metropolitan areas)
Range defined as 1900 PCS
AT&T uses these for GPRS/WCDMA(3G) as well as Verizon for 1XRTT/EVDO(3G)
Problem: Even if they had full range of the spectrum, they'd only have 25mhz to work with in the 850 range, and 60 mhz in the 1900 range.
But they dont, its split because they obviously cant occupy the same channels.
AT&T has 12.5mhz of spectrum in 850, and 30 in PCS.
Each of their 3G towers operate on a 5mhz (3.84mhz to be precise, but spaced with 5 leaving room for 2 3g channels and the rest per tower allocated to non 3G GSM transmission) channel. This means, they have 2 channels MAX at their current configuration. This creates problems because even with synchronized transmissions, the number of required towers to support large metropolitan areas is enormous, and with the max capacity of active users per sector being in the neighborhood of 256 before time division gets brutal, you need ALOT of sectors. adding such a huge amount of towers in a concentrated area is difficult as well as not totally effective, as the noise created from the other towers interfere with each other, reducing speeds and capacity.
Therein lies the problem: No matter WHAT they do, they are bound physically by the spectrum limitation.
Thats AT&T and most other 3G GSM carriers.
Verizon / CDMA carriers technology varies, which is why they have a higher capacity network than AT&T.
CDMA uses 2mhz channels (1.25, configured 2.0mhz for spacing / deployment) and no need for split spectrum use for 1XRTT/EVDO
Therefore, their capacity is much greater because then can do a little over double AT&T / GSM in the same amount of spectrum. This helps tremendously in densely populated areas as they can utilize the increased channels to "Hop" further with towers before reusing channels in a manner that doesnt interfere as badly. As such, the signal quality is better. However, due to the smaller channel, it is not as fast nor capable of data / voice at the same time, as is AT&T / GSM.. In my opinion this is the most efficient use of spectrum. Also, the narrower channel tends to go slightly farther and deal with obstructions better than the wider channel.
So, while we all gripe about the sorriness of carrier A,B, and C, and at the end of the day it is on them to deal with all these problems, it should be known there there isnt a hell of a lot they can really do about it, especially AT&T.
Moving on to the 4G, it is not simply about the speed, its about the spectrum / efficient use of it. With a 1.5mhz channel on LTE(4G) you can surpass current 5mhz WCDMA speeds, AND there is more available spectrum for carriers to use. Therefore, they can increase capacity per sector to almost quadruple or more, AND have more towers before reusing channels. Verizon keenly moved on this well in advance of AT&T, and as such is going to reap the benefits, while AT&T is still feverishly trying to fix its 3G deployment and make it up to snuff as best as possible.
The carriers on the other hand DO need to take on the financial responsibility of growing their systems to meet their market demand, and while I can see how they would think google/facebook / whoever should help them, I cannot come up with any logic to support it nor much of a compelling reason for them to chip in.
I guess the carriers of the world are staring at the same thing we do with all of our equipment: Its ANTIQUATED!!!!