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| Microcellular mobile communication system |
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On-demand information service using wireless cellular communications system
| Details |
Inventors: Wegener, Albert W.;
Assignee: Command Audio Corporation (Redwood City, CA)
Primary Examiner: Urban; Edward F.
Assistant Examiner: Gary; Erika A.
Attorney, Agent or Firm: Morrison&Foerster LLP
The quantity of unused channels in a cellular wireless communications system is identified. From program content that is stored in a database, an amount of program content is accessed based on the identified quantity of unused channels. The accessed program content is formatted for broadcast on at least a portion of the unused channels, and the formatted content is then transferred to the cellular wireless communications system for broadcast to mobile receivers. In some embodiments a content transmission schedule is broadcast on one of the unused channels. |
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DETAILED DESCRIPTION FIG.
2 is a diagrammatic view illustrating functional blocks in an embodiment of an audio/video-on-demand broadcast information system that includes a cellular wireless communications system.
Elements 100 on the left side of the drawing are associated with the cellular wireless communications system.
Elements 102 on the right side of the drawing are associated with the audio/video-on-demand system.
Elements 100 and 102 are shown separated by dashed line 104 for illustrative purposes only.
Cellular processor 106 performs well-known cellular system functions (e.
g.
, mobile unit registration, two-way call management, data compression and packetization) to control setup, paging, and voice traffic processing between portable transceiver 108 (e.
g.
, cellular telephone handset) and PSTN 110.
Transceiver 108 outputs uplink signal 112 to uplink power amplifier 114 which routes setup information 116 and uplink voice traffic 118 to cellular processor 106.
Similarly, cellular processor 106 routes paging information 120 and downlink voice traffic 122 to base station downlink power amplifier 124.
The downlink information 120, 122 is routed through the existing cellular system's downlink combiner 126, which is described in detail below.
Downlink power amplifier 124 outputs downlink signal 128 to transceiver 108.
Telephone calls between transceiver 108 and PSTN 110 are managed using well-known protocols.
The digitized audio and/or video program content (e.
g.
, news, entertainment, bulletins) to be broadcast to the audio/video-on-demand receivers is stored in content database 130 (stored for example on a conventional computer (not shown)).
The program content is periodically updated by one or more content service providers 132 and is deleted by content maintenance function 134 when no longer relevant (e.
g.
, outdated news).
The content from database 130 is broadcast on unused cellular channels (content channels) within the cell.
Thus the number of available content channels changes as voice channel demand changes, and consequently the amount of content that is broadcast within the cell also dynamically changes
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