Multiplex communications – Communication over free space – Repeater
Patent
1996-03-05
1998-10-06
Ton, Dang
Multiplex communications
Communication over free space
Repeater
370422, H04J 116
Patent
active
058188231
ABSTRACT:
A slot assign system has a central station and a plurality of peripheral stations, and the communication between them is made through an artificial satellite. The central station stores pre-assign slot information of each of the peripheral stations, and multiplexes slot assign information to be changed at a next frame over the pre-assign slot information. The peripheral station, on receipt of the slot assign information, transmits the next frame using a slot assigned to itself. The central station sends a vacant slot with no pre-assignment as a non-assign information signal, and the peripheral station recognizing the vacant slot transmits, using the slot assigned to itself, a reservation request for using the vacant slot. The central station transmits a frame next to the frame to which the slot has been assigned. Thus, the slot assign information is centrally controlled by the central station and can be changed without a need for cutting off the data link between the central station and the peripheral stations.
REFERENCES:
patent: 4694453 (1987-09-01), Kobayashi et al.
patent: 4736371 (1988-04-01), Tejima et al.
patent: 4947451 (1990-08-01), Nawata
NEC Corporation
Ton Dang
LandOfFree
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