OPTICAL SIGNAL TRANSMISSION SYSTEM

PURPOSE:To discriminate and process plural sets of peculiar information without confusion by sending each specific information outputted from plural optical signal transmission/reception terminal devices to one optical signal transmission/ reception terminal device as difference frequency signals. C...

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Bibliographic Details
Main Authors HIKI MASAHIRO, UWAZUMI YOSHIAKI, SUGIYAMA MASAYUKI, TAKASHIMA KAZUO
Format Patent
LanguageEnglish
Published 15.04.1987
Subjects
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
MULTIPLEX COMMUNICATION
TRANSMISSION
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Summary:PURPOSE:To discriminate and process plural sets of peculiar information without confusion by sending each specific information outputted from plural optical signal transmission/reception terminal devices to one optical signal transmission/ reception terminal device as difference frequency signals. CONSTITUTION:When data request is issued to each of other optical signal transmission/reception terminal devices 2 from one high-order optical signal transmission/reception terminal device 1 at first, each transmission/reception terminal device 2 sends optical signals having predetermined peculiar transmission frequencies f1, f2...fn to the transmission/reception terminal device 1. then the transmission/reception terminal device 1 discriminates each transmission/ reception terminal device 2 to process the peculiar information. Further, since the peculiar information measured by each transmission/reception terminal device 2 changes time by time, when deviations DELTAf1, DELTAf2...DELTAfn of the time wise changing information are sent with respect to the frequencies f1, f2...fn, the data is sent further in details.
Bibliography:Application Number: JP19850222262