Multi-direction time division multiplex communication system

Multiplex communications – Wide area network – Packet switching

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Details

455 51, H04J 306

Patent

active

044701411

ABSTRACT:
The inventive system includes a central station and a plurality of satellite stations which communicate on a time division multiplex basis. The central station generates frame synchronizing and clock signals, along with digital communication signals, which are suitably modulated into channel time slots. During its individually assigned channel time slot, each satellite station extracts the frame and clock signals and demodulates the communication signals which were directed to it. The extracted frame and clock signals are used in the satellite station to retime the communication signals which are sent in bursts of modulated carrier waves from the satellite stations to the central station. The central station demodulates the bursts of carrier waves to transmit the intelligence therein to its destination. The advantage is that many stations can share the same frequency and thereby make more efficient use of the transmission capacity.

REFERENCES:
patent: 3532985 (1970-10-01), Glomb
patent: 3836721 (1974-09-01), Sugioka
patent: 4117267 (1978-09-01), Haberle
patent: 4129755 (1978-12-01), Murakami

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