Method and user equipment for receiving downlink signal, and method and base station for transmitting downlink signal

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

• a receiver, and
• a processor, configured to control the receiver, that:
• controls the receiver to receive a reference signal and a downlink control channel based on the reference signal in a specific band preconfigured for the UE out of an entire system band of a subframe;
• and
• controls the receiver to receive a downlink data channel in the specific band of the subframe based on the downlink control channel,
• wherein the specific band is smaller than the entire system band,
• wherein the downlink control channel is received in one or more orthogonal frequency division multiplexing (OFDM) symbols, except for a predetermined number of front OFDM symbols among OFDM symbols in the subframe,
• wherein the downlink data channel is received in remaining OFDM symbols except the predetermined number of front symbols and the one or more OFDM symbols, and
• wherein the reference signal is received in at least one of the one or more OFDM symbols.

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

• transmitting a reference signal and a downlink control channel based on the reference signal in a specific band preconfigured for a user equipment (UE) out of an entire system band of a subframe to the UE;
• and
• transmitting a downlink data channel based on the downlink control channel to the UE in the specific band of the subframe,
• wherein the specific band is smaller than the entire system band,
• wherein the downlink control channel is transmitted in one or more orthogonal frequency division multiplexing (OFDM) symbols except for a predetermined number of front OFDM symbols among OFDM symbols in the subframe,
• wherein the downlink data channel is transmitted in remaining OFDM symbols, except the predetermined number of front symbols and the one or more OFDM symbols, and
• wherein the reference signal is transmitted in at least one of the one or more OFDM symbols.

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

• a transmitter, and
• a processor, configured to control the transmitter, that:
• controls the receiver to transmit a reference signal and a downlink control channel based on the reference signal in a specific band preconfigured for a user equipment (UE) out of an entire system band of a subframe to the UE;
• and
• controls the receiver to transmit a downlink data channel based on the downlink control channel to the UE in the specific band of the subframe,
• wherein the specific band is smaller than the entire system band,
• wherein the downlink control channel is transmitted in one or more orthogonal frequency division multiplexing (OFDM) symbols except for a predetermined number of front OFDM symbols among OFDM symbols in the subframe,
• wherein the downlink data channel is transmitted in remaining OFDM symbols, except the predetermined number of front symbols and the one or more OFDM symbols, and
• wherein the reference signal is transmitted in at least one of the one or more OFDM symbols.