Patent ID: 8739013

Claim:
A method for detecting control information in a wireless communication system using a downlink slot comprising a plurality of orthogonal frequency-division multiplexing (OFDM) symbols, the method comprising: monitoring a physical downlink control channel (PDCCH), and de-masking cyclic redundancy check (CRC) bits included in the PDCCH by using a user equipment identifier (UE-ID); checking a cyclic redundancy check (CRC) error of the de-masked CRC bits; and if the CRC error is not detected, determining whether to activate semi-persistent scheduling (SPS) based on a new data indicator (NDI) and control bits for modulation and coding scheme (MCS), wherein the NDI is a 1-bit information field included in downlink control information (DCI) on the PDCCH, wherein the control bits for MCS are included in the DCI on the PDCCH, wherein the SPS is activated if the NDI is equal to zero and at least one predefined bit of the control bits for MCS is equal to zero.