Multiplex communications – Wide area network – Packet switching
Patent
1988-11-04
1990-05-15
Olms, Douglas W.
Multiplex communications
Wide area network
Packet switching
455 12, H04J 302
Patent
active
049264222
ABSTRACT:
A controller is provided for a baseband switching matrix with one space switching stage. The matrix supplies the controller with a number of service channels (IOTS, CH) of the uplink frames, which channels comprise encoded commands that are decoded by the controller which generates service channels (IOTD, FMC) for the downlink frames and sends them towards the matrix. The controller is subdivided into three functional units: a preprocessing unit (PREL) which decodes uplink frame service channels; a processing unit (ELAB), which receives the commands decoded by the preprocessing unit and/or by a telecontrol station with which it performs a bidirectional dialogue and generates control signals comprising the matrix switching states; and an interface unit (INTM) comprising two memories (MEMA, MEMB) alternatively operating as active or backup memory, which store the switching states supplied by the processing unit and send them to the matrix.
REFERENCES:
patent: 4150335 (1979-04-01), Cooperman
patent: 4456988 (1984-06-01), Nakagome et al.
patent: 4480328 (1984-10-01), Alaria et al.
patent: 4555782 (1985-11-01), Alaria et al.
patent: 4628506 (1986-12-01), Sperlick
patent: 4763129 (1988-08-01), Perrotta
International Switching Symposium 1987, pp. 834-835, New York, Alaria et al., "System Architecture, Services and Performances of the Italian Domestic Satellite Italsat".
Global Telecommunications Conferences Nov. 15-18, 1987, Tokyo, pp. 937-941, F. Marconicchio et al., "The Italsat Satellite On Board Baseband processor, Concept and Technologies".
Proceedings of the IEEE, vol. 65, No. 3, Mar. 1977, pp. 411-419, New York, U.S., Ito et al., Analysis of a Switch Matrix for an SS/TDMA System.
Alaria Gian B.
Poggio Cesare
Ventimiglia Giovanni
Dubno Herbert
Jung Min
Olms Douglas W.
Selenia Spazio S.p.A.
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