Multiplex communications – Wide area network – Packet switching
Patent
1992-08-20
1995-06-20
Olms, Douglas W.
Multiplex communications
Wide area network
Packet switching
370 953, H04J 306
Patent
active
054266424
ABSTRACT:
A satellite broadcast communication system which makes a communication via a communication satellite comprises N sub stations respectively assigned a time slot having a predetermined time width T.sub.0, where N is an integer greater than one, and a main station including a broadcast part for broadcasting broadcast information to the N sub station via the communication satellite using a reference frame which has a time width N.times.T.sub.0, a part for receiving a reception acknowledge signal from the sub stations, and a part for setting a multi-frame to a predetermined value. The predetermined value is M.times.T.sub.0 when only M sub stations are subject to reception of the broadcast information, N/M is an integer and M.ltoreq.N, and the predetermined value is M.sub.1 .times.T.sub.0 when only M sub stations are subject to reception of the broadcast information, N/M is not an integer and M.sub.1 is an integer greater than M. Each of the N sub stations include a transmitting part for transmitting the reception acknowledge signal to the main station using the multi-frame which is set in the main station in response to the broadcast information which is received from the main station and is intended for the sub station to which the transmitting part belongs.
REFERENCES:
patent: 4252999 (1981-02-01), Acampora et al.
patent: 4506383 (1985-03-01), McGann
patent: 4688216 (1987-08-01), Saburi
patent: 4763129 (1988-08-01), Perrotta
patent: 4774708 (1988-09-01), Hotta
patent: 5128971 (1992-07-01), Johnson
Fujitsu Limited
Olms Douglas W.
Ton Dang
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