H - Electricity – 04 – J
Patent
H - Electricity
04
J
363/17
H04J 3/06 (2006.01) H04L 12/28 (2006.01)
Patent
CA 1268869
Abstract of the Disclosure In a communication network system, a central equipment unit transmits, over a down link, a frame signal carrying subframe information signals addressed to respective terminal equipment units, on a time- division multiplexing basis. The frame signal consists of a delay measurement window field carrying address information designating one of the terminal equipment units for delay measurement and a data field carrying the subframe information signals addressed to the ter- minal equipment units. When a terminal equipment unit is polled from the central equipment unit to measure the delay time, it transmits a response signal to the cen- tral equipment unit after a predetermined time interval from the reception timing of the frame signal, such that the response signal arrives at the central equipment unit within the delay measurement window field of the next frame signal. The central equipment unit measures a delay time between the transmission timing of the next frame signal and the reception timing of the response signal, and transmits transmission timing adjustment information based on the measured delay time, and ad- dress information of the terminal equipment unit, in an address field of the next frame signal. The terminal equipment unit transmits a subframe signal to the central equipment unit after a time interval, depending on the transmission timing adjustment information, from the reception timing of a frame signal.
534454
Haruyama Hideaki
Kobayashi Hiroshi
Kabushiki Kaisha Toshiba
Marks & Clerk
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