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Method for transmitting/receiving discovery signals in D2D communication and devices for supporting same

  • US 9,955,336 B2
  • Filed: 09/25/2014
  • Issued: 04/24/2018
  • Est. Priority Date: 09/25/2013
  • Status: Active Grant
First Claim
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1. A method for transmitting a discovery response signal, in a wireless communication system, the method performed by a first user equipment (UE), which supports a device-to-device (D2D) communication, and comprising:

  • receiving, from a second UE which supports the D2D communication, a first discovery request signal;

    transmitting, to the second UE, a first discovery response signal as a response to the first discovery request signal;

    receiving, from the second UE, a discovery check signal as a response to the first discovery response signal;

    receiving, from the second UE, a second discovery request signal;

    determining whether or not to transmit a second discovery response signal to the second UE as a response to the second discovery request signal based on a validity of proximity for the first UE; and

    transmitting the second discovery response signal to the second UE based on the determination when the validity of proximity for the first UE is determined to be not valid,wherein the validity of proximity for the first UE is determined based on a time interval between a point of time at which the discovery check signal has been received and a point of time at which the validity of proximity has been determined, andwherein the time interval is scaled according to a mobility of the first UE.

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