Multiple access satellite communication system for mini-earth st

Details Multiple access satellite communication system for mini-earth st Multiple access satellite communication system for mini-earth st

1990-06-25

1992-12-15

Olms, Douglas W.

Multiplex communications

Wide area network

Packet switching

3701041, H04J 316

Patent

active

051723751

ABSTRACT:
A multiple access satellite communication system in which a plurality of mini-earth stations each transmit data packets to hub earth station via a satellite over an inbound channel, while the hub station transmits to the mini-earth stations in a broadcast mode over outbound channels. Each mini-earth station selectively uses a fixed assignement access method, random access method, and demand assignment access method, depending on the frequency of the transmission from a terminal connected thereto, the amount of transmitted data, and whether or not the transmission from the terminal is periodic. The hub station outputs a reception response signal to the outbound channels by determining whether or not a conflict of data packets or a transmission error has occurred on the inbound channels. Packets for re-transmission are sent out to the inbound channels by the demand assignment access method at all times, with no regard to the access method used at the time of transmission.

REFERENCES:
patent: 3806879 (1974-04-01), Schmidt et al.
patent: 4381562 (1983-04-01), Acampora
patent: 4731783 (1988-03-01), Fontanes
patent: 4742512 (1988-05-01), Akashi et al.
patent: 4775974 (1988-10-01), Koboyoshi
A. Fujii et al., IEEE Global Telecommunications Conference, "AA/TDMA--Adaptive Satellite Access Method for Mini-Earth Station Networks", vol. 3 of 3, pp. 1494-1499 (1986).

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