Multiplex communications – Communication over free space – Having a plurality of contiguous regions served by...
Patent
1996-01-29
1999-08-17
Hsu, Alpus H.
Multiplex communications
Communication over free space
Having a plurality of contiguous regions served by...
370349, H04J 312
Patent
active
059403837
ABSTRACT:
A novel and improved method and apparatus for automatically selecting the proper data service based on the data being transmitted is described. Either packet data service or modem emulation data service is selected by a wireless subscriber unit based on the data received from a computer system or other digital data system. If an AT dial command is received, the wireless subscriber unit enters modem emulation mode. If packet initialization sequence is received, the wireless subscriber unit enters packet data service mode. In the preferred embodiment of the invention, a packet data initialization sequence is comprised of a pre-flag byte dead time, followed by a flag byte, followed by the reception of any additional data within a post flag time interval. Also in the preferred embodiment of the invention, the pre flag dead time is ten character time intervals and the post flag time interval is one character time interval, where a time interval is the time necessary to transmit a single byte of data at the given baud rate.
REFERENCES:
patent: 4719458 (1988-01-01), Miesterfeld et al.
patent: 4837858 (1989-06-01), Ablay et al.
patent: 4924493 (1990-05-01), Dang et al.
patent: 5453986 (1995-09-01), Davis et al.
patent: 5471473 (1995-11-01), Tejima
patent: 5473679 (1995-12-01), La Porta et al.
patent: 5475681 (1995-12-01), White et al.
patent: 5528664 (1996-06-01), Slekys et al.
patent: 5533019 (1996-07-01), Jayapalan
patent: 5533029 (1996-07-01), Gardner
patent: 5570367 (1996-10-01), Ayanoglu et al.
patent: 5590406 (1996-12-01), Bayley et al.
patent: 5657345 (1997-08-01), Lazaridis
patent: 5697065 (1997-12-01), Sakata
patent: 5777991 (1998-07-01), Adachi et al.
Brown Charles D.
Hsu Alpus H.
Miller Russell B.
Qualcomm Incorporated
Yao Kwang B.
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