Multiplex communications – Wide area network – Packet switching
Patent
1982-04-14
1984-10-30
Olms, Douglas W.
Multiplex communications
Wide area network
Packet switching
370104, H04J 1500
Patent
active
044803281
ABSTRACT:
Digitized message samples or bytes appearing in time slots of an outgoing PCM frame, temporarily allocated to respective local channels such as telephone lines of limited activity, are written during alternate storage periods of, say, 32 ms (each encompassing 256 PCM frames) in a pair of memories from which they are alternately read out in a different sequence to form special packets of interleaved bytes from respective channel pairs or other channel groupings. A number of such special packets are assembled together with other packets from more active channels into an outgoing TDMA frame which forms part of a superframe equal in length to a storage period; the TDMA frames are modulated at an accelerated bit rate upon an r-f carrier for transmission to a relay station aboard a satellite. Upon redistribution of the packets at the relay station according to their respective destinations, they are beamed back to earth for reception by other ground stations. There the special packets of incoming TDMA frames are alternately written, during like storage periods, in another pair of memories from which they are then read out in respective time slots of consecutive incoming PCM frames before being sent to their destinations. A TDMA frame period of each superframe is used to carry a synchronization code generated in the transmitting section and extracted in the receiving section of a ground station for correlating its operation with a clock aboard the satellite.
REFERENCES:
patent: 4004098 (1977-01-01), Shimasaki
patent: 4004225 (1977-01-01), G/a/ nssmantel
patent: 4320501 (1982-03-01), Le Dieu et al.
Alaria Gian B.
Preti Roberto
CSELT - Centro Studi e Laboratori Telecomunicazioni S.P.A.
Olms Douglas W.
Ross Karl F.
Scutch III Frank M.
LandOfFree
Method of and system for communication via satellite does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method of and system for communication via satellite, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of and system for communication via satellite will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1104936