Date Added: Feb 2010
A wide class of mobile computing applications is location-based. The ability of sieving by location the mass of information enables to feed ones' mobile devices with data items, such as, the list of friends in the surroundings, the closest movie theatres or the description of the nearby monument. Observed from a networking perspective, both the request and the distribution of location-based data require ubiquitous access to network services. So far, such a pervasive wireless coverage has been provided by a single technology, i.e. the cellular phone network.