One fact we might glean from a new Ericsson look at cell tower backhaul and fronthaul requirements is the variability of requirements. Some 80 percent of all sites are in the low-capacity category, while the high capacity sites represent only a small percentage of total, Ericsson says.
Put another way, customer usage across the network is highly non-uniform.
In the 3G era, about 20 percent of mobile cell sites handled 60 percent of total traffic, while half of sites handled 95 percent of traffic. In the 4G era, perhaps 80 percent of traffic has been carried by 20 percent of cell sites.
For any single user, perhaps half of all usage occurs in just one macrocell. About 80 percent of usage happens in three cells. About 20 percent of usage happens in 28 additional cells.
U.K. population density suggests very similar rules of thumb about cell site usage. Maximum density is more than 160 times higher than the national mean and 12 times higher than the most densely populated 80 percent of areas, according to the Wireless Broadband Alliance.
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