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Systems and methods for timing synchronization and synchronization source selection for vehicle-to-vehicle communications

  • US 10,470,143 B2
  • Filed: 03/13/2018
  • Issued: 11/05/2019
  • Est. Priority Date: 03/13/2018
  • Status: Active Grant
First Claim
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1. A method for synchronizing a communication device, comprising:

  • obtaining a timing signal from a timing synchronization reference source;

    computing a system frame number (SFN)-direct frame number (DFN) offset;

    creating a timing fingerprint using the timing signal and the SFN-DFN offset, the timing fingerprint also comprising additional timing information;

    entering the timing fingerprint into a database;

    continually updating the timing fingerprint;

    determining whether the timing signal remains within a threshold;

    if the timing signal exceeds the threshold, iterating the timing fingerprint;

    verifying the timing fingerprint to determine whether there is a timing inconsistency between a most recent timing fingerprint and current time;

    if the timing fingerprint is verified, using the SFN-DFN offset to derive current DFN timing to decode a sidelink control information (SCI) communication; and

    if the SCI communication is decoded, using the timing signal for communicating over a sidelink communication channel.

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