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 terminal in a communication system, the method comprising:
receiving, from a base station, first information for a dormant bandwidth part (BWP) configuration for a secondary cell, and second information for a resource allocation type;
receiving, from the base station, downlink control information (DCI) format 1_1; and
identifying the DCI format 1_1 as a secondary cell dormancy indication without a scheduling, in case that a cyclic redundancy check (CRC) of the DCI format 1_1 is scrambled by a cell radio network temporary identifier (C-RNTI) or a modulation and coding scheme (MCS)-C-RNTI, and all bits of a frequency domain resource assignment field are a specific value,
wherein a physical downlink control channel (PDCCH) on a BWP of the secondary cell is not monitored, in case that the BWP of the secondary cell is the dormant BWP,
wherein all bits of the frequency domain resource assignment field in the DCI format 1_1 for the secondary cell dormancy indication are equal to 0, in case that the resource allocation type is configured as type 0 based on the second information,
wherein all bits of the frequency domain resource assignment field in the DCI format 1_1 for the secondary cell dormancy indication are equal to 1, in case that the resource allocation type is configured as type 1 based on the second information, and
wherein all bits of the frequency domain resource assignment field in the DCI format 1_1 for the secondary cell dormancy indication are equal to 0 or 1, in case that the resource allocation type is configured as a dynamic switch based on the second information.
2. The method of claim 1 , wherein information fields in the DCI format 1_1 are used as the secondary cell dormancy indication, the information fields comprising a modulation and coding scheme (MCS), a new data indicator (NDI), a redundancy version (RV), a hybrid automatic repeat request (HARD) process number, an antenna port and a demodulation reference signal (DMRS) sequence initialization.
3. The method of claim 2 , wherein the secondary cell dormancy indication is a bitmap defined based on the information fields, each bit of the bitmap being associated with a secondary cell,
wherein an active BWP is a dormant BWP for a secondary cell, in case that a bit for the secondary cell of the bitmap is 0, and
wherein an active BWP is a BWP other than the dormant BWP for the secondary cell, in case that the bit for the secondary cell of the bitmap is 1.
4. The method of claim 1 , wherein the DCI format 1_1 is identified as the secondary cell dormancy indication without scheduling, in case that a carrier indicator field (CIF) included in the DCI are equal to 0.
5. A terminal in a communication system, the terminal comprising:
a transceiver; and
a controller configured to:
receive, from a base station, first information for a dormant bandwidth part (BWP) configuration for a secondary cell, and second information for a resource allocation type;
receive, from the base station, downlink control information (DCI) format 1_1; and
identify the DCI format 1_1 as a secondary cell dormancy indication without a scheduling, in case that a cyclic redundancy check (CRC) of the DCI format 1_1 is scrambled by a cell radio network temporary identifier (C-RNTI) or a modulation and coding scheme (MCS)-C-RNTI, and all bits of a frequency domain resource assignment field are a specific value,
wherein a physical downlink control channel (PDCCH) on a BWP of the secondary cell is not monitored, in case that the BWP of the secondary cell is the dormant BWP,
wherein all bits of the frequency domain resource assignment field in the DCI format 1_1 for the secondary cell dormancy indication are equal to 0, in case that the resource allocation type is configured as type 0 based on the second information,
wherein all bits of the frequency domain resource assignment field in the DCI format 1_1 for the secondary cell dormancy indication are equal to 1, in case that the resource allocation type is configured as type 1 based on the second information, and
wherein all bits of the frequency domain resource assignment field in the DCI format 1_1 for the secondary cell dormancy indication are equal to 0 or 1, in case that the resource allocation type is configured as a dynamic switch based on the second information.
6. The terminal of claim 5 , wherein information fields in the DCI format 1_1 are used as the secondary cell dormancy indication, the information fields comprising a modulation and coding scheme (MCS), a new data indicator (NDI), a redundancy version (RV), a hybrid automatic repeat request (HARD) process number, an antenna port and a demodulation reference signal (DMRS) sequence initialization.
7. The terminal of claim 6 , wherein the secondary cell dormancy indication is a bitmap defined based on the information fields, each bit of the bitmap being associated with a secondary cell,
wherein an active BWP is a dormant BWP for a secondary cell, in case that a bit for the secondary cell of the bitmap is 0, and
wherein an active BWP is a BWP other than the dormant BWP for the secondary cell, in case that the bit for the secondary cell of the bitmap is 1.
8. The terminal of claim 5 , wherein the DCI format 1_1 is identified as the secondary cell dormancy indication without scheduling, in case that a carrier indicator field (CIF) included in the DCI are equal to 0.
9. A method performed by a base station in a communication system, the method comprising:
transmitting, to a terminal, first information for a dormant bandwidth part (BWP) configuration for a secondary cell, and second information for a resource allocation type; and
transmitting, to the terminal, downlink control information (DCI) format 1_1;
wherein the DCI format 1_1 is used as a secondary cell dormancy indication without scheduling to indicate the terminal not to monitor a physical downlink control channel (PDCCH) on a dormant BWP of the secondary cell, in case that a cyclic redundancy check (CRC) of the DCI format 1_1 is scrambled by a cell radio network temporary identifier (C-RNTI) or a modulation and coding scheme (MCS)-C-RNTI, and all bits of a frequency domain resource assignment field are a specific value,
wherein all bits of the frequency domain resource assignment field in the DCI format 1_1 for the secondary cell dormancy indication are equal to 0, in case that the resource allocation type is configured as type 0 based on the second information,
wherein all bits of the frequency domain resource assignment field in the DCI format 1_1 for the secondary cell dormancy indication are equal to 1, in case that the resource allocation type is configured as type 1 based on the second information, and
wherein all bits of the frequency domain resource assignment field in the DCI format 1_1 for the secondary cell dormancy indication are equal to 0 or 1, in case that the resource allocation type is configured as a dynamic switch based on the second information.
10. The method of claim 9 , wherein information fields in the DCI format 1_1 are used as the secondary cell dormancy indication, the information fields comprising a modulation and coding scheme (MCS), a new data indicator (NDI), a redundancy version (RV), a hybrid automatic repeat request (HARD) process number, an antenna port and a demodulation reference signal (DMRS) sequence initialization.
11. The method of claim 10 , wherein the secondary cell dormancy indication is a bitmap defined based on the information fields, each bit of the bitmap being associated with a secondary cell,
wherein an active BWP is a dormant BWP for a secondary cell, in case that a bit for the secondary cell of the bitmap is 0, and
wherein an active BWP is a BWP other than the dormant BWP for the secondary cell, in case that the bit for the secondary cell of the bitmap is 1.
12. The method of claim 9 , wherein the DCI format 1_1 is identified as the secondary cell dormancy indication without scheduling, in case that a carrier indicator field (CIF) included in the DCI are equal to 0.
13. A base station in a communication system, the base station comprising:
a transceiver; and
a controller configured to:
transmit, to a terminal, first information for a dormant bandwidth part (BWP) configuration for a secondary cell, and second information for a resource allocation type; and
transmit, to the terminal, downlink control information (DCI) format 1_1,
wherein the DCI format 1_1 is used as a secondary cell dormancy indication without scheduling to indicate the terminal not to monitor a physical downlink control channel (PDCCH) on a dormant BWP of the secondary cell, in case that a cyclic redundancy check (CRC) of the DCI format 1_1 is scrambled by a cell radio network temporary identifier (C-RNTI) or a modulation and coding scheme (MCS)-C-RNTI, and all bits of a frequency domain resource assignment field are a specific value,
wherein all bits of the frequency domain resource assignment field in the DCI format 1_1 for the secondary cell dormancy indication are equal to 0, in case that the resource allocation type is configured as type 0 based on the second information,
wherein all bits of the frequency domain resource assignment field in the DCI format 1_1 for the secondary cell dormancy indication are equal to 1, in case that the resource allocation type is configured as type 1 based on the second information, and
wherein all bits of the frequency domain resource assignment field in the DCI format 1_1 for the secondary cell dormancy indication are equal to 0 or 1, in case that the resource allocation type is configured as a dynamic switch based on the second information.
14. The base station of claim 13 , wherein information fields in the DCI format 1_1 are used as the secondary cell dormancy indication, the information fields comprising a modulation and coding scheme (MCS), a new data indicator (NDI), a redundancy version (RV), a hybrid automatic repeat request (HARD) process number, an antenna port and a demodulation reference signal (DMRS) sequence initialization.
15. The base station of claim 14 , wherein the secondary cell dormancy indication is a bitmap defined based on the information fields, each bit of the bitmap being associated with a secondary cell,
wherein an active BWP is a dormant BWP for a secondary cell, in case that a bit for the secondary cell of the bitmap is 0, and
wherein an active BWP is a BWP other than the dormant BWP for the secondary cell, in case that the bit for the secondary cell of the bitmap is 1.
16. The base station of claim 13 , wherein the DCI format 1_1 is identified as the secondary cell dormancy indication without scheduling, in case that a carrier indicator field (CIF) included in the DCI are equal to 0.