Digital communication system with integral messaging and method

Details Digital communication system with integral messaging and method Digital communication system with integral messaging and method

1997-07-07

2000-09-19

Ton, Dang

Multiplex communications

Communication over free space

Combining or distributing information via time channels

455512, H04J 300

Patent

active

061222712

ABSTRACT:
A digital communications system (10) includes a transmitting apparatus (12) and a receiving apparatus (14). In addition to a primary information signal (16), messages and control signals (24) are communicated for use by the equipment. To avoid the use of dedicated frequency spectrum, control channel time slots, or the degradation of forward error correction of the encoded information signal, the transmitting apparatus determines the occurrence of a silence period (28) in the information signal, then inserts the message or control signal information into the silence period. The resulting composite signal is transmitted to the receiving apparatus where message and control information is removed for use by the receiving equipment, leaving the information signal intact.

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