| 摘要 |
<p>A method of broadcasting data files to selected mobile units (18), comprising steps of (a) receiving, through a bi-directional wireless network (12), a data request from a mobile unit (18), the data request including identification information for the mobile unit (18), (b) associating the data request with a digital data file; and (c) broadcasting the digital data file together with identification data for the mobile unit (18) over a download channel on a broadcast network (14) that has an overlapping coverage area with the bi-directional wireless network (12).
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