Method for transmitting and receiving control information for device-to-device (D2D) communication in wireless communication system and apparatus therefor

A communication device for use in a wireless communication system, the device comprising:

• a memory;
• and
• a processor, wherein the processor is configured to:
• receive a physical downlink control channel (PDCCH), which is scrambled with a semi-persistent scheduling (SPS)—radio network temporary identifier (RNTI) (SPS-RNTI) and includes a downlink control information (DCI) format 0;
• validate an SPS uplink scheduling assignment based on the received PDCCH;
• and
• transmit uplink data based on the SPS uplink scheduling assignment,
• wherein the validating comprises:
• if the SPS-RNTI is not for Proximity Services (ProSe) communication,
• checking if two bits in a first field in the DCI format 0 are set to ‘00’;
• checking if three bits in a second field in the DCI format 0 are set to ‘000’;
• and
• checking if a most significant bit (MSB) in a third field in the DCI format 0 is set to ‘0’,
• else if the SPS-RNTI is for the ProSe communication,
• checking if the two bits in the first field in the DCI format 0 are set to ‘00’, and
• checking if the MSB in the third field in the DCI format 0 is set to ‘0’, and
• wherein if the SPS-RNTI is for the ProSe communication, the three bits in the second field are used for indicating a resource allocation for the ProSe communication.