Method and apparatus for reducing power consumption of terminal in wireless communication system

A method performed by a base station in a communication system, the method comprising:

• transmitting, to a user equipment (UE), configuration information of a dormant bandwidth part (BWP) for a secondary cell (SCell);
• and
• transmitting, to the UE, downlink control information (DCI), wherein a frequency domain resource assignment field, a modulation and coding scheme (MCS) field, a new data indicator (NDI) field, a redundancy version (RV) field, a hybrid automatic repeat request (HARQ) process number field, an antenna port field, and a demodulation reference signal (DMRS) sequence initialization field are included in the DCI
• wherein the DCI is considered as an indication of SCell dormancy, in case that a resource allocation type corresponds to type 1 and all bits of the frequency domain resource assignment field are equal to 1,
• wherein a sequence of the MCS field, the NDI field, the RV field, the HARQ process number field, the antenna port field, and the DMRS sequence initialization field is interpreted as providing a bitmap to each configured SCell,
• wherein a bit of the bitmap corresponds to an SCell, and
• wherein a 0 value for the bit of the bitmap indicates the dormant BWP for the SCell.

A user equipment (UE) in a communication system, the UE comprising:

• a transceiver;
• and
• a controller configured to:
• receive, from a base station, configuration information of a dormant bandwidth part (BWP) for a secondary cell (SCell),
• receive, from the base station, downlink control information (DCI). wherein a frequency domain resource assignment field, a modulation and coding scheme (MCS) field, a new data indicator (NDI) field, a redundancy version (RV) field, a hybrid automatic repeat request (HARQ) process number field, an antenna port field, and a demodulation reference signal (DMRS) sequence initialization field are included in the DCI, and
• consider the DCI as an indication of SCell dormancy, in case that a resource allocation type corresponds to type 1 and all bits of the frequency domain resource assignment field are equal to 1,
• wherein a sequence of the MCS field, the NDI field, the RV field, the HARQ process number field, the antenna port field, and the DMRS sequence initialization field is interpreted as providing a bitmap to each configured SCell,
• wherein a bit of the bitmap corresponds to an SCell, and
• wherein a 0 value for the bit of the bitmap indicates the dormant BWP for the SCell.

A base station in a communication system, the base station comprising:

• a transceiver;
• and
• a controller configured to:
• transmit, to a user equipment (UE), configuration information of a dormant bandwidth part (BWP) for a secondary cell (SCell), and
• transmit, to the UE, downlink control information (DCI) wherein a frequency domain resource assignment field, a modulation and coding scheme (MCS) field, a new data indicator (NDI) field, a redundancy version (RV) field, a hybrid automatic repeat request (HARQ) process number field, an antenna port field, and a demodulation reference signal (DMRS) sequence initialization field are included in the DCI,
• wherein the DCI is considered as an indication of SCell dormancy, in case that a resource allocation type corresponds to type 1 and all bits of the frequency domain resource assignment field are equal to 1,
• wherein a sequence of the MCS field, the NDI field, the RV field, the HARQ process number field, the antenna port field, and the DMRS sequence initialization field is interpreted as providing a bitmap to each configured SCell, and
• wherein a bit of the bitmap corresponds to an SCell, and
• wherein a 0 value for the bit of the bitmap indicates the dormant BWP for the SCell.