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专利名称：TELECOMMUNICATION SYSTEM WITH
TRANSMITTING STATIONS SELECTIVELYOPERABLE AS TEMPORARY REFERENCESTATIONS
发明人：BERNASCONI G,IT,PORETTI I,IT申请号：US3761814D申请日：19711215公开号：US3761814A公开日：19730925
摘要：A time-division-multiplex telecommunication system, with a multiplicity ofground stations communicating with one another via satellite, allocates to each groundstation one or more subframes in a series of such subframes following one another incyclic succession to constitute a sequence of signal frames. The first subframe of eachframe, designated the reference subframe, serves for the transmission of frame-synchronizing signals from one of the stations of the system operating as a referencestation, the latter sending out its address together with the frame-synchronizing code. Inevery other station, a counter triggered by an incoming frame-synchronizing codedetermines from that address the subframe allocated to the reference station and, in theone station using the next-following active subframe, generates an internal signaldesignating that station as a standby station to serve as a reference station if the actualreference station drops out. The standby condition is terminated upon reception of thenext frame-synchronizing code but, in the absence of a predetermined number of suchcodes in successive frames, is converted into a reference condition whereby the affected
station takes over the transmission of frame-synchronizing pulses.
申请人：SIEMENS MILANO,IT
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