Wireless communication network system synchronization method
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United States of America Patent
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Apr 19, 2016
Grant Date -
Jul 31, 2014
app pub date -
Mar 27, 2014
filing date -
Sep 30, 2011
priority date (Note) -
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status (Latency Note)
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Abstract
Mobile radio sets are installed on front and rear parts of a mobile body, one of fixed radio sets is set as a synchronization base station, and the other radio sets including the mobile radio sets are set as synchronization packet relay stations. Each of the relay stations in a synchronization acquiring mode makes a transition to a ground synchronization maintaining mode higher in synchronization accuracy when receiving a synchronization packet without the intervention of the mobile radio sets, or makes a transition to an on-vehicle synchronization maintaining mode lower in synchronization accuracy when receiving a synchronization packet with the intervention of the mobile radio sets, and the relay station in the on-vehicle synchronization maintaining mode makes a transition to the ground synchronization maintaining mode when receiving a synchronization packet from a relay station in the ground synchronization maintaining mode.
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