Method and apparatus for transmitting downlink control information in wireless communication system

A user equipment for communication in a communication system supporting one or more bandwidth parts, the user equipment comprising:

• a transceiver;
• and
• a controller coupled with the transceiver and configured to:
• identify a first bandwidth part for a cell and a second bandwidth part for the cell through a radio resource control signaling, wherein each of the first bandwidth part and the second bandwidth part is defined with a corresponding subcarrier spacing and frequency domain location,
• identify a first control resource set on the first bandwidth part and a second control resource set on the second bandwidth part through the radio resource control signaling, and
• acquire second downlink control information for the second bandwidth part based on the first control resource set on the first bandwidth part being activated,
• wherein a bandwidth part indicator, a frequency domain resource assignment, and a time domain resource assignment are included in the second downlink control information,
• wherein a number of bits of bandwidth part indicator is defined based on the radio resource control signaling,
• wherein the first bandwidth part is activated by first downlink control information, and
• wherein the first downlink control information and the second downlink control information are acquired in a user equipment specific control region.

A method performed by a base station for communication in a communication system supporting one or more bandwidth parts, the method comprising:

• transmitting a radio resource control signaling including information for a first bandwidth part for a cell and information for a second bandwidth part for the cell, wherein each of the first bandwidth part and the second bandwidth part is defined with a corresponding subcarrier spacing and frequency domain location;
• identifying a first control resource set on the first bandwidth part and a second control resource set on the second bandwidth part through the radio resource control signaling;
• and
• transmitting second downlink control information for the second bandwidth part based on the first control resource set on the first bandwidth part being activated,
• wherein a bandwidth part indicator, a frequency domain resource assignment, and a time domain resource assignment are included in the second downlink control information,
• wherein a number of bits of bandwidth part indicator is defined based on the radio resource control signaling,
• wherein the first bandwidth part is activated by first downlink control information, and
• wherein the first downlink control information and the second downlink control information are acquired in a user equipment specific control region.

A base station for communication in a communication system supporting one or more bandwidth parts, the base station comprising:

• a transceiver;
• and
• a controller coupled with the transceiver and configured to:
• transmit a radio resource control signaling including information for a first bandwidth part for a cell and information for a second bandwidth part for the cell, wherein each of the first bandwidth part and the second bandwidth part is defined with a corresponding subcarrier spacing and frequency domain location,
• identify a first control resource set on the first bandwidth part and a second control resource set on the second bandwidth part through the radio resource control signaling, and
• transmit second downlink control information for the second bandwidth part based on the first control resource set on the first bandwidth part being activated,
• wherein a bandwidth part indicator, a frequency domain resource assignment, and a time domain resource assignment are included in the second downlink control information,
• wherein a number of bits of bandwidth part indicator is defined based on the radio resource control signaling,
• wherein the first bandwidth part is activated by first downlink control information, and
• wherein the first downlink control information and the second downlink control information are acquired in a user equipment specific control region.