Method and apparatus for reducing power consumption of terminal in wireless communication system
The disclosure relates to a communication scheme and system for convergence between an IoT technology and a 5G communication system for supporting a higher data transfer rate beyond a 4G system. The disclosure may be applied to intelligent services (e.g. smart home, smart building, smart city, smart car or connected car, health care, digital education, retail business, and security and safety-related services), based on a 5G communication technology and an IoT-related technology. In addition, the disclosure provides a method and an apparatus for reducing the power consumption of a terminal in a wireless communication system.
1 . A method performed by a user equipment (UE) in a communication system, the method comprising:
receiving, from a base station, first information for a secondary cell (SCell) configuration, wherein the first information includes a dormant bandwidth part (BWP) configuration for the SCell and information indicating an SCell group for dormancy associated with the SCell;
receiving, from the base station, second information for a first search space set to monitor a first physical downlink control channel (PDCCH) for detection of a first downlink control information (DCI) format and third information for a second search space set to monitor a second PDCCH for detection of a second DCI format; and
receiving, from the base station, a DCI format for indicating SCell dormancy,
wherein, in case that the DCI format is a first DCI format, the first DCI format includes an SCell dormancy indication field for indicating SCell dormancy, the SCell dormancy indication field corresponding to a first bitmap where each bit is associated with a group of SCells, and
wherein, in case that the DCI format is a second DCI format, the second DCI format includes a sequence of fields for indicating SCell dormancy, the sequence of fields corresponding to a second bitmap where each bit is associated with an SCell.
2 . The method of claim 1 ,
wherein a size of the first bitmap is equal to a number of SCell groups.
3 . The method of claim 1 ,
wherein a ‘0’ value for a bit of the first bitmap indicates a dormant BWP as an active downlink (DL) BWP for each SCell in an SCell group corresponding to the bit, and
wherein a ‘1’ value for the bit of the first bitmap indicates a BWP other than the dormant BWP as the active DL BWP for each SCell in the SCell group corresponding to the bit.
4 . A method performed by a base station in a communication system, the method comprising:
transmitting, to a user equipment (UE), first information for a secondary cell (SCell) configuration, wherein the first information includes a dormant bandwidth part (BWP) configuration for the SCell and information indicating an SCell group for dormancy associated with the SCell;
transmitting, to the UE, second information for a first search space set to monitor a first physical downlink control channel (PDCCH) for detection of a first downlink control information (DCI) format and third information for a second search space set to monitor a second PDCCH for detection of a second DCI format;
and
transmitting, to the UE, a DCI format for indicating SCell dormancy,
wherein, in case that the DCI format is a first DCI format, the first DCI format includes an SCell dormancy indication field for indicating SCell dormancy, the SCell dormancy indication field corresponding to a first bitmap where each bit is associated with a group of SCells, and
wherein, in case that the DCI format is a second DCI format, the second DCI format includes a sequence of fields for indicating SCell dormancy, the sequence of fields corresponding to a second bitmap where each bit is associated with an SCell.
5 . The method of claim 4 ,
wherein a size of the first bitmap is equal to a number of SCell groups.
6 . The method of claim 4 ,
wherein a ‘0’ value for a bit of the first bitmap indicates a dormant BWP as an active downlink (DL) BWP for each SCell in an SCell group of SCells corresponding to the bit, and
wherein a ‘1’ value for the bit of the first bitmap indicates a BWP other than the dormant BWP as the active DL BWP for each SCell in the SCell group corresponding to the bit.
7 . A user equipment (UE) in a communication system, the UE comprising:
a transceiver; and
a controller configured to:
receive, from a base station, first information for a secondary cell (SCell) configuration, wherein the first information includes a dormant bandwidth part (BWP) configuration for the SCell and information indicating an SCell group for dormancy associated with the SCell;
receive, from the base station, second information for a first search space set to monitor a first physical downlink control channel (PDCCH) for detection of a first downlink control information (DCI) format; and
receive, from the base station, a DCI format for indicating SCell dormancy,
wherein, in case that the DCI format is a first DCI format, the first DCI format includes an SCell dormancy indication field for indicating SCell dormancy, the SCell dormancy indication field corresponding to a first bitmap where each bit is associated with a group of SCells, and
wherein, in case that the DCI format is a second DCI format, the second DCI format includes a sequence of fields for indicating SCell dormancy, the sequence of fields corresponding to a second bitmap where each bit is associated with an SCell.
8 . The UE of claim 7 ,
wherein a size of the first bitmap is equal to a number of SCell groups.
9 . The UE of claim 7 ,
wherein a ‘0’ value for a bit of the first bitmap indicates a dormant BWP as an active downlink (DL) BWP for each SCell in an SCell group corresponding to the bit, and
wherein a ‘1’ value for the bit of the first bitmap indicates a BWP other than the dormant BWP as the active DL BWP for each SCell in the SCell group corresponding to the bit.
10 . A base station in a communication system, the base station comprising:
a transceiver; and
a controller configured to:
transmit, to a user equipment (UE), first information for a secondary cell (SCell) configuration, wherein the first information includes a dormant bandwidth part (BWP) configuration for the SCell and information indicating an SCell group for dormancy associated with the SCell;
transmit, to the UE, second information for a first search space set to monitor a first physical downlink control channel (PDCCH) for detection of a first downlink control information (DCI) format and third information for a second search space set to monitor a second PDCCH for detection of a second DCI format;
and
transmit, to the UE, a_DCI format for indicating SCell dormancy,
wherein, in case that the DCI format is a first DCI format, the first DCI format includes an SCell dormancy indication field for indicating SCell dormancy, the SCell dormancy indication field corresponding to a first bitmap where each bit is associated with a group of SCells, and
wherein, in case that the DCI format is a second DCI format, the second DCI format includes a sequence of fields for indicating SCell dormancy, the sequence of fields corresponding to a second bitmap where each bit is associated with an SCell.
11 . The base station of claim 10 ,
wherein a size of the first bitmap is equal to a number of SCell groups.
12 . The base station of claim 10 ,
wherein a ‘0’ value for a bit of the first bitmap indicates a dormant BWP as an active downlink (DL) BWP for each SCell in an SCell group corresponding to the bit, and
wherein a ‘1’ value for the bit of the first bitmap indicates a BWP other than the dormant BWP as the active DL BWP for each SCell in the SCell group corresponding to the bit.
13 . The method of claim 1 ,
wherein the first DCI format is DCI format 0_1, DCI format 1_1 or DCI format 2_6, and
wherein the second DCI format is DCI format 1_1 satisfying predetermined conditions.
14 . The method of claim 4 ,
wherein the first DCI format is DCI format 0_1, DCI format 1_1 or DCI format 2_6, and
wherein the second DCI format is DCI format 1_1 satisfying predetermined conditions.
15 . The UE of claim 7 ,
wherein the first DCI format is DCI format 0_1, DCI format 1_1 or DCI format 2_6, and
wherein the second DCI format is DCI format 1_1 satisfying predetermined conditions.
16 . The base station of claim 10 ,
wherein the first DCI format is DCI format 0_1, DCI format 1_1 or DCI format 2_6, and
wherein the second DCI format is DCI format 1_1 satisfying predetermined conditions.