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Patent Searching and Data


Title:
METHOD AND DEVICE FOR MULTIPLEX TRANSMISSION
Document Type and Number:
Japanese Patent JPS56111347
Kind Code:
A
Abstract:

PURPOSE: To improve transmission efficiency by transmitting news information, etc., from a master station to subordinate stations in time-division mode and by multiplexing return signals from the subordinate stations to the master station in frequency-division mode.

CONSTITUTION: When news information is allotted from master station 10, it is multiplexed by time-division multiplexer 103 together with telegram information to subordinate stations 20a∼20n and sent to down trunk route 301. Each subordinate station draws the bit allotted to itself by time-division multiplex receiver 201 and obtains its required news information by terminal device 203. Then, answer signal [ACK] or [NACK] from the subordinate station to the master station is transmitted by frequency-division multiplex transmitter 202 to master station 10 via up trunk route 302 at the frequency allotted to the subordinate station.


Inventors:
KUBOTA SHIGEO
ETOU NAGATOSHI
HOSHINO SATOSHI
Application Number:
JP1980000013601
Publication Date:
September 03, 1981
Filing Date:
February 08, 1980
Export Citation:
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Assignee:
KYODO TSUUSHINSHIYA
International Classes:
H04J3/14; H04J4/00; (IPC1-7): H04J4/00