Studies on realization of information retrieval service function by fiber optic broadband distribution system

As one approach to the realization of post 64 kbit/s ISDN, studies have been made on the optic broadband distribution system, based on the fiber optic transmission by tree (or bus) trunk line and star subscriber line. To realize a more versatile C‐E communication system, however, not only must the s...

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Published inElectronics & communications in Japan. Part 1, Communications Vol. 73; no. 7; pp. 38 - 48
Main Authors Yamagata, Jun, Takemoto, Kenji
Format Journal Article
LanguageEnglish
Published New York Wiley Subscription Services, Inc., A Wiley Company 01.07.1990
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Summary:As one approach to the realization of post 64 kbit/s ISDN, studies have been made on the optic broadband distribution system, based on the fiber optic transmission by tree (or bus) trunk line and star subscriber line. To realize a more versatile C‐E communication system, however, not only must the service functions such as distribution of multichannel video information, character, still picture and data be provided, but also the information retrieval function with random access such as videotex. This paper discusses theoretically the realizability of the information retrieval service by the optic broadband distribution system from the viewpoint of whether or not a sufficient number of subscribers can be accommodated.
Bibliography:istex:7D0D92FD12536498757CB13F7FEEC8778C5573DB
ArticleID:ECJA4410730704
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Jun Yamagata graduated in 1965 from the Dept. Electr cal Eng., Fac. Eng. Sci., Osaka University, and obtained a Master's degree from there in 1967. He then affiliated with NTT. He is engaged i n research and development of digital relay transmission systems, video trans‐ mission systems, communication network architecture and subscriber optic transmission systems. Presently, he is with the Res. Plan. Div., NTT Telecomm. Net. Lab.
Kenji Takemoto graduated in 1971 from the Dept. ElectronicEng., Kyushu Institute of Tech‐ nology, and has a Dr. of Eng. degree. He is affiliated with NTT Elect. Corn. Lab. where he is engaged in research on submarine coaxial transmission systems, suboceanic optical cable trans‐ mission systems and subscriber optic transmission systems. Presently, he is Leader Researcher at NTT Telecomm. Net. Lab. He received the Paper Award in 1978 fromIEE.
ISSN:8756-6621
1520-6424
DOI:10.1002/ecja.4410730704