Method and apparatus for transmitting/receiving control information for device to device (D2D) communication in a wireless communications system
First Claim
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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Abstract
According to an embodiment of the present invention, a method for a first terminal to receive control information from a second terminal for device to device communication includes the steps of: receiving downlink control information (DCI) format containing a link indicator; and obtaining selectively one of downlink allocation information and uplink permission information contained in the DCI format according to the link indicator, wherein the downlink allocation information indicates a resource region for receiving data from the second terminal, and the uplink permission information indicates a resource region for transmitting data to the second terminal.
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Citations
12 Claims
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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:
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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, and wherein the link identifier configured for the first UE is identical to a link identifier configured for the second UE. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A first user equipment (UE) apparatus for performing device-to-device (D2D) communication with a second UE in a wireless communication system, the UE apparatus comprising:
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a reception module; and a processor, connected with the reception module, that; performs blind decoding on a search space corresponding to a link identifier configured for the first UE, controls the reception module to receive, in the search space, a 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, determines 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 acquires 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, and wherein the link identifier configured for the first UE is identical to a link identifier configured for the second UE. - View Dependent Claims (8, 9, 10, 11, 12)
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Specification