Mobile communication system and a method of communication mode t

Details Mobile communication system and a method of communication mode t Mobile communication system and a method of communication mode t

1996-08-21

1998-05-26

Olms, Douglas W.

Multiplex communications

Communication over free space

Combining or distributing information via time channels

370468, 370524, H04J 322

Patent

active

057577927

ABSTRACT:
A mobile communication system which enables any combinations of communication of speech signal and data signal to perform even during telephone communication is realized. In a mobile communication system provided with a base station control apparatus being connected to an ISDN switching unit, when data signal transmission is required while a mobile station being communicating with an ISDN terminal, a speech signal half-rate processing operation and a data signal transmission operation are commenced between the mobile station and the base station control apparatus. As for TDMA (Time Division Multiple Access) frames of signal between the mobile station and the base station, the full-rate (32 Kbps) speech signal is contained in all frames when only speech communication is performed, and each of the half-rare (16 Kbps) processed speech signal and the data signal is contained in every other frames alternatively when both of speech and data communication are performed simultaneously. At the ISDN terminal, speech signal is transferred through the B channel and data signal is transferred through the D channel.

REFERENCES:
patent: 5519707 (1996-05-01), Takahashi
patent: 5598412 (1997-01-01), Griffith et al.
patent: 5657358 (1997-08-01), Panech et al.

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