Continuous CDPD base station and method of facilitating efficient data transfer
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United States of America Patent
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Apr 9, 2002
Issued Date -
N/A
app pub date -
Jun 7, 1995
filing date -
Jun 7, 1995
priority date (Note) -
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Abstract
A multi-mode communication system, including controller, base stations and subscriber stations, where the communication system has the capability of operating either in a packet-switched mode or a circuit-switched mode. The packet-switched mode of operation complies with the existing Cellular Digital Packet Data (CDPD) standard with respect to modulation and higher level protocol, and is designated continuous CDPD mode. This mode of operation is highly cost effective for transfers of relatively small amounts of data. For larger data transfers, the more cost-effective continuous CDPD mode is used. Thus, using this mode, the system is capable of providing superior data rate performance over a vastly greater coverage area than existing circuit-switched modems. Requests for access to continuous CDPD channels are initiated at subscriber stations. This initiation can result from manual intervention by the user of the subscriber station, or can be automatic in response to the amount of data to be transferred, as well as comprising structure for each mode of data transfer used by the service provider.
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