Method of performing BWP operation in wireless communication system and an apparatus therefor
This specification provides a method of performing a bandwidth part (BWP) operation in a wireless communication system. Specifically, The method performed by a terminal includes receiving a first message including information related to at least one initial BWP configuration from a network, receiving a second message including configuration information for an additional BWP from the network, receiving downlink control information (DCI) related to BWP switching for at least one configured BWP from the network, and transmitting and receiving signals to and from the network in an activated BWP based on the received DCI.
1. A method of transmitting, by a user equipment, a signal in a time division duplex (TDD) wireless communication system, the method comprising:
receiving, from a base station, configuration information comprising (i) information for a first bandwidth part (BWP) and (ii) information for downlink (DL) BWPs;
receiving, from the base station, a signal on the first BWP based on an initial access procedure;
receiving, from the base station, downlink control information (DCI) on the first BWP, where the DCI is related to switching a DL BWP to a second BWP among the DL BWPs;
based on the DCI related to switching the DL BWP, switching an uplink (UL) BWP to a third BWP that corresponds to the second BWP; and
transmitting, to the base station, a signal on the third BWP.
2. The method of claim 1 , wherein switching the UL BWP to the third BWP comprises activating a BWP or deactivating a BWP.
3. The method of claim 1 , wherein the information for the DL BWPs comprises BWP identifiers (IDs) to identify the DL BWPs.
4. The method of claim 1 , wherein:
the DCI related to switching the DL BWP is received in a shared control resource set (CORESET), and
the shared CORESET is configured in a part that is commonly shared between a plurality of configured BWPs.
5. The method of claim 4 , wherein each of the plurality of configured BWPs have an identical numerology.
6. The method of claim 1 , further comprising:
transmitting, to the base station, an acknowledgement (ACK) or a negative acknowledgement (NACK) for the DCI.
7. The method of claim 1 , wherein switching the UL BWP to the third BWP that corresponds to the second BWP comprises:
switching the UL BWP to the third BWP having a BWP index that is identical to a BWP index of the second BWP to which the DL BWP was switched.
8. A processing apparatus configured to control a user equipment to transmit a signal in a time division duplex (TDD) wireless communication system, the processing apparatus comprising:
at least one processor; and
at least one computer memory operably connectable to the at least one processor and storing instructions that, based on being executed by the at least one processor, perform operations comprising:
receiving, from a base station, configuration information comprising (i) information for a first bandwidth part (BWP) and (ii) information for downlink (DL) BWPs;
receiving, from the base station, a signal on the first BWP based on an initial access procedure;
receiving, from the base station, downlink control information (DCI) on the first BWP, where the DCI is related to switching a DL BWP to a second BWP among the DL BWPs;
based on the DCI related to switching the DL BWP, switching an uplink (UL) BWP to a third BWP that corresponds to the second BWP; and
transmitting, to the base station, a signal on the third BWP.
9. The processing apparatus of claim 8 , wherein switching the UL BWP to the third BWP comprises activating a BWP or deactivating a BWP.
10. The processing apparatus of claim 8 , wherein the information for the DL BWPs comprises BWP identifiers (IDs) to identify the DL BWPs.
11. The processing apparatus of claim 8 , wherein:
the DCI related to switching the DL BWP is received in a shared control resource set (CORESET), and
the shared CORESET is configured in a part that is commonly shared between a plurality of configured BWPs.
12. The processing apparatus of claim 11 , wherein each of the plurality of configured BWPs have an identical numerology.
13. The processing apparatus of claim 8 , the operations further comprise:
transmitting, to the base station, an acknowledgement (ACK) or a negative acknowledgement (NACK) for the DCI.
14. The processing apparatus of claim 8 , wherein switching the UL BWP to the third BWP that corresponds to the second BWP comprises:
switching the UL BWP to the third BWP having a BWP index that is identical to a BWP index of the second BWP to which the DL BWP was switched.
15. A non-transitory computer readable storage medium storing at least one instruction, that, based on being executed by at least one processor, perform operations comprising:
receiving, from a base station, configuration information comprising (i) information for a first bandwidth part (BWP) and (ii) information for downlink (DL) BWPs;
receiving, from the base station, a signal on the first BWP based on an initial access procedure;
receiving, from the base station, downlink control information (DCI) on the first BWP, where the DCI is related to switching a DL BWP to a second BWP among the DL BWPs;
based on the DCI related to switching the DL BWP, switching an uplink (UL) BWP to a third BWP that corresponds to the second BWP; and
transmitting, to the base station, a signal on the third BWP.