Downlink signal reception method and user equipment, and downlink signal transmission method and base station

A user equipment for receiving a downlink (DL) signal, the user equipment comprising,

• a radio frequency (RF) unit, and
• a processor configured to control the RF unit,
• wherein the processor:
• detects a physical downlink control channel (PDCCH) by attempting to decode decoding candidates within time symbols from time symbol #0 to time symbol #N−1 for DL control channel transmission in a time transmission interval (TTI);
• and
• controls the RF unit to receive DL data based on DL control information carried by the PDCCH, and
• wherein each of the time symbols #0 to #N−1 includes floor(X/N) decoding candidates, where N is a maximum number of symbols available for DL control channel transmission in the TTI and X is a maximum number of decoding candidates for each TTI.

A method of transmitting a downlink (DL) signal by a base station, the method comprising:

• transmitting a physical downlink control channel (PDCCH) in one of decoding candidates included within time symbols from time symbol #0 to time symbol #N−1 for DL control channel transmission in a time transmission interval (TTI);
• and
• transmitting DL data based on DL control information carried by the PDCCH,
• wherein each of the time symbols #0 to #N−1 includes floor(X/N) decoding candidates, where N is a maximum number of symbols available for DL control channel transmission in the TTI and X is a maximum number of decoding candidates for each TTI.

A base station for transmitting a downlink (DL) signal, the base station comprising,

• a radio frequency (RF) unit, and
• a processor configured to control the RF unit,
• wherein the processor:
• controls the RF unit to transmit a physical downlink control channel (PDCCH) in one of decoding candidates included within time symbols from time symbol #0 to time symbol #N−1 for DL control channel transmission in a time transmission interval (TTI);
• and
• controls the RF unit to transmit DL data based on DL control information carried by the PDCCH, and
• wherein each of the time symbols #0 to #N−1 includes floor(X/N) decoding candidates, where N is a maximum number of symbols available for DL control channel transmission in the TTI and X is a maximum number of decoding candidates for each TTI.