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Method for transmitting discovery message in wireless communication system and device therefor

  • US 10,305,650 B2
  • Filed: 11/03/2014
  • Issued: 05/28/2019
  • Est. Priority Date: 11/01/2013
  • Status: Active Grant
First Claim
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1. A method, performed by a terminal, for transmitting a discovery message in a wireless communication system supporting Device-to-Device (D2D) direct communication, the method comprising:

  • receiving, from a base station, resource configuration information including a plurality of resource sets configured for transmitting the discovery message;

    selecting a resource set from among the plurality of resource sets based on discovery search information, wherein the discovery search information is shared among specific terminals, including the terminal;

    selecting at least one resource from among a plurality of resources included in the selected resource set, based on a pre-configured resource selecting scheme; and

    transmitting the discovery message through the selected at least one resource,wherein a transmission power of the discovery message is configured based on the following equation;


    Prestricted=min(

    P
    open,Pmax)wherein min(x,y) is a minimum value between x and y, Prestricted is a transmission power of the discovery message in a restricted discovery procedure, Popen is a transmission power of the discovery message in an open discovery procedure, Pmax is a maximum transmission power of the terminal for transmitting the discovery message, and Z is received power information or interference information,wherein the received power information includes a ratio between a minimum received power of the plurality of resource sets and a minimum received power of the selected resource set, andwherein the interference information includes a ratio between an average interference of the plurality of resource sets and the selected resource set.

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