System and Method for Providing Indications of Participating Advertisers to a Portable User Device

摘要

A method of providing indications of participating advertisers to a portable user device including detecting a plurality of participating advertisers in a vicinity of the portable user device; determining a relative proximity of the portable user device to each of the plurality of the participating advertisers; rendering an indication of the participating advertisers on the portable user device to convey the determined relative proximity of each of the plurality of the participating advertisers; detecting a change in the relative proximity of the participating advertisers; and changing the rendering of the participating advertisers on the portable user device to convey the detected change in the relative proximity of the participating advertisers.