femtocells (wifi size cells) are virtually never cost effective, not enough density to support the infrastructure. a combination Microcells and picocells, howe

femtocells (wifi size cells) are virtually never cost effective, not enough density to support the infrastructure. a combination Microcells and picocells, however might be doable, you use mesh networking to tie the picocells to to each other, and back to the microcell, ideally its a slow speed low power network, around 900 mhz, providing a access method for text messaging, and push notifications (sub 100kbps, think of it as a faster control channel), Data could be mesh even between handsets, passing (some) data thru to the nearest base. A higher speed network used for more intensive data use situations that goes directly to the nearest micro or picocell, For voice calls or in rural areas, you could default to the regular BTS.