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Method and apparatus for transmitting/receiving control information for device to device (D2D) communication in a wireless communications system

  • US 9,883,496 B2
  • Filed: 02/28/2013
  • Issued: 01/30/2018
  • Est. Priority Date: 03/06/2012
  • Status: Active Grant
First Claim
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1. A method for receiving control information for device-to-device (D2D) communication with a second user equipment (UE) by a first UE in a wireless communication system, the method comprising:

  • performing blind decoding on a search space corresponding to a link identifier configured for the first UE;

    receiving, in the search space, downlink control information (DCI) comprising a link indicator indicating a link direction for the D2D communication between the first UE and the second UE, downlink allocation information, and uplink grant information;

    determining the link direction based on whether the first UE is a source station or a destination station and a value of the link indicator; and

    selectively acquiring any one of the downlink allocation information and the uplink grant information according to the determined link direction,wherein DCI for the first UE is identical to DCI for the second UE and the DCI for the first UE and the second UE are transmitted at the same time from a coordination station, and the downlink allocation information indicates a resource region in which data is received from the second UE, and the uplink grant information indicates a resource region for transmitting data to the second UE, andwherein the link identifier configured for the first UE is identical to a link identifier configured for the second UE.

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