So why is Google interested in Femto cells?
One view is that Google may be the first new breed of mobile operators. For a green field entrant the prospects of building a distributed network using Femto Cell technology surely has some benefit: the network is operational the minute the first Femto box is plugged in the wall and no valuable time is wasted acquiring sites, radio planning and optimising coverage...etc.
Another view is that Google is interested in the potentially disruptive model of community based networking such as the one propelled by FON. Clearly Femto Cell based community networks have a similar appeal, and hence Google's interest.