Multiplex communications – Wide area network – Packet switching
Patent
1987-03-13
1989-01-24
Olms, Douglas W.
Multiplex communications
Wide area network
Packet switching
370108, H04J 306
Patent
active
048005606
ABSTRACT:
In a TDMA satellite communication network comprising control and local earth stations communicable with one another through a satellite, a time difference between transmission and reception of a reference burst is measured at the control earth station to detect a time deviation (Tb) from a standard offset time (SO) predetermined for the control earth station. In the control earth station, the time deviation is doubled and added to the standard offset time to provide a reception time instant (t.sub.4) for the local earth station. Thus, the reception time instant is varied and predicted in the control earth station with reference to the time deviation detected in the control earth station. The local earth station determines a transmission time instant (t.sub.2 or t.sub.2 ') by delaying a reception timing signal by a predetermined time interval (Ta).
REFERENCES:
patent: 3320611 (1967-05-01), Sekimoto et al.
patent: 3566267 (1971-02-01), Golding
patent: 4689787 (1987-08-01), Hotta
Samejima et al., Burst Synchronization for Domestic TDMA System, Review of the Electrical Comm. Lab., vol. 26, 1978.
Aoki Takahiro
Tejima Shunichiro
Jung Min
NEC Corporation
Olms Douglas W.
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