Multipoint communication system having polling and reservation schemes

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United States of America Patent

PATENT NO 4742512
SERIAL NO

06887003

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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In a multipoint communication system, first polling signals are sequentially and respectively transmitted to terminal stations on a broadcast channel from a central station, asking a request for reservation without waiting for a reply from the terminal stations. A reservation signal is transmitted on a multiple access channel from a terminal station requesting the reservation to the central station in response to the first polling signal addressed to it. A second polling signal is then transmitted on the broadcast channel in response to the reservation signal and the multiple access channel is reserved for a period of time variable in accordance with the reservation signal. A data signal is transmitted from the terminal station requesting the reservation on the reserved multiple access channel in response to the second polling signal.

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Patent Owner(s)

  • NEC CORPORATION

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Akashi, Fumio Tokyo, JP 4 320
Kobayashi, Kazutomo Tokyo, JP 12 677
Namiki, Junji Tokyo, JP 11 573
Watanabe, Kojiro Tokyo, JP 10 456

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