| 摘要 |
Many different methods, apparatus, and program products are disclosed for handling virtual signs over their life cycles. Potential future locations and headings of a mobile device are used to fetch virtual signs in advance of when the virtual signs might be used. Techniques are disclosed for handling timelines of virtual signs, including registering and responding to events in the timelines. Techniques are disclosed for allowing localities to license virtual signs. Techniques are disclosed to allow advertisers to bid for and win virtual sign competitions and product placement. Techniques are presented for presenting billing information to owners of virtual signs. |
