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Prioritized synchronization signals and mechanism for distributed device-to-device systems

  • US 10,091,709 B2
  • Filed: 12/20/2013
  • Issued: 10/02/2018
  • Est. Priority Date: 05/06/2013
  • Status: Active Grant
First Claim
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1. An apparatus to be included in a user equipment (“

  • UE”

    ), the apparatus comprising;

    processing circuitry;

    to attempt to detect a plurality of source signals from a plurality of synchronization sources, to synchronize to a first source signal of the plurality of source signals where the first source signal is detected, andto generate a first synchronization request signal where the plurality of source signals is not detected; and

    communications circuitry, communicatively coupled with the processing circuitry, to transmit the first synchronization request signal where the first synchronization request signal is generated,wherein the first source signal is directly from an evolved Node B (“

    eNB”

    ) or forwarded from the eNB by another UE and the processing circuitry, upon detecting the first source signal and a second source signal from a global navigation satellite system (“

    GNSS”

    ), is to synchronize with the first source signal based on a relatively higher priority associated with the eNB as compared to the GNSS.

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