Digital radio communication system with efficient audio and non-

Details Digital radio communication system with efficient audio and non- Digital radio communication system with efficient audio and non-

1996-01-11

1998-05-26

Chin, Wellington

Multiplex communications

Communication over free space

Having a plurality of contiguous regions served by...

370337, 370347, 370522, H04J 312

Patent

active

057577889

ABSTRACT:
In a radio communication system for performing digital radio communications by using time-division multiplexed time slots, a first personal station receives its user's speech through the microphone, converts it into audio data, and transmits them on time slots to a second personal station. On the other hand, the first personal station receives non-audio data from the data processor connected with the second personal station and stores. When the audio data amount inputted to the first personal station in a unit time period is lower than a threshold and the communications between the first personal station and the second personal station are put in a silence condition, the first personal station transmits non-audio data on times slots to the second personal station. When the communications return to a sound condition, audio data transmission is restored. Whether each time slot carries audio data or non-audio data is designated by an identifier which is written in a predetermined field of each time slot.

REFERENCES:
patent: 3660606 (1972-05-01), De Witt
patent: 4476559 (1984-10-01), Brolin et al.
patent: 4510596 (1985-04-01), Hartmann et al.
patent: 5446739 (1995-08-01), Nakano et al.
patent: 5515379 (1996-05-01), Crisler et al.
patent: 5553079 (1996-09-01), Niki et al.

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