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Not entirely true. Carriers own multiple bands of spectrum and they often can deploy more bandwidth to a tower as long as it isn't the same frequency used by a nearby tower.
Here is a simplified diagram:
(Frequencies 1 and 3) - (frequencies 2 and 4) - (Frequencies 1 and 3)
They can reuse the spectrum again a couple of cells over with minimal interference depending on the specific spectrum in use but like anything there is a cost/benefit return to be considered.
Higher frequencies attenuate at a greater rate and allow for smaller, more densely populated cell sizes.
They are still limited to that area for each band. Once they deploy all of their non-overlapping bands on a tower, they can no longer increase bandwidth. If an apartment complex were to go up next to the tower when they were near capacity from residents at the neighboring complex there is no way to increase the bandwidth in the area, since spectrum is finite. For the cable company, they just lay more lines leading to the new building.





Member since:
2006-12-21
The Cable Company can drop more wire down your street, but if you throw another Cell Tower up it still can only access 1 EM band.