Apparatus and method for transmitting d2d data based on resource pattern

A user equipment (UE) to transmit device-to-device (D2D) data using a D2D data transmission resource, comprising:

• a wireless transceiver configured to:
• receive configuration information associated with a D2D data transmission resource, the configuration information comprising information of a D2D data allocation period and being transmitted from an evolved NodeB (eNB);
• and
• one or more processors configured to:
• determine a D2D data transmission resource in each D2D data allocation period, the D2D data transmission resource comprising a pool of subframes;
• and
• select D2D data transmission subframes from among the pool of subframes based on a changed pattern, the changed pattern being derived from a basic pattern,
• wherein the wireless transceiver transmits, from the UE to another UE, D2D data based on the selected D2D data transmission subframes,
• wherein selecting of the D2D data transmission subframes comprises:
• the one or more processors is configured to determine, based on whether the number of subframes in the pool of subframes is less than a length of the basic pattern, the changed pattern based on a value of (R modulo X), wherein R corresponds to the number of subframes in the pool of subframes and X corresponds to the length of the basic pattern, where R and X are natural numbers,
• wherein a length of the changed pattern corresponds to the number of subframes in the pool of subframes.