BWP activation method for terminal
The present disclosure provides a method and an apparatus, wherein a terminal, for which a primary cell and a secondary cell are configured, performs a random access procedure, and a specific BWP on the secondary cell is activated on the basis that DCI received from a base station indicates non-dormancy.
1. A method for activating a bandwidth part (BWP) performed by a user equipment (UE) for which a primary cell and a secondary cell are configured in a wireless communication system, the method comprising:
receiving BWP information from a base station via a radio resource control (RRC) signaling;
receiving downlink control information (DCI) including information related to dormancy from the base station; and
activating a specific BWP on the secondary cell based on the DCI,
wherein, based on a current active BWP being a dormant BWP, the DCI informs the activation of the specific BWP provided based on the BWP information via the RRC signaling, and
wherein a BWP inactivity timer is not used for transitioning from the dormant BWP, which is activated, to a default BWP.
2. The method of claim 1 , wherein the UE receives the DCI on a primary cell.
3. The method of claim 1 , wherein the DCI indicates non-dormancy in units of a plurality of cells.
4. The method of claim 3 , wherein a field length of a field indicating the non-dormancy in the DCI is 1 bit.
5. The method of claim 1 , wherein a maximum number of configurable BWPs per cell configured for the UE is four.
6. The method of claim 1 , wherein the UE receives a PDSCH or a PDCCH on the specific BWP.
7. The method of claim 1 , wherein the UE does not perform physical downlink control channel (PDCCH) monitoring or does not receive a physical downlink shared channel (PDSCH) on the dormant BWP.
8. The method of claim 1 , wherein the dormant BWP is a BWP configured by a higher layer signaling.
9. The method of claim 1 , wherein the primary cell is a cell in which the UE performs an initial connection establishment procedure or a connection re-establishment procedure, and the secondary cell is a cell in which additional radio resources are provided to the UE.
10. A user equipment (UE) for which a primary cell and a secondary cell are configured, the UE comprising:
one or more memories storing instructions;
one or more transceivers; and
one or more processors coupling the one or more memories and the one or more transceivers,
wherein the one or more processors execute the instructions to:
receive bandwidth part (BWP) information from a base station via a radio resource control (RRC) signaling;
receive downlink control information (DCI) including information related to dormancy from the base station; and
activate a specific BWP on the secondary cell based on the DCI,
wherein, based on a current active BWP being a dormant BWP, the DCI informs the activation of the specific BWP provided based on the BWP information via the RRC signaling, and
wherein a BWP inactivity timer is not used for transitioning from the dormant BWP, which is activated, to a default BWP.
11. An apparatus configured to control a user equipment (UE) for which a primary cell and a secondary cell are configured, the apparatus comprising:
one or more processors; and
one or more memories operably coupled by the one or more processors and storing instructions,
wherein the one or more processors execute the instructions to:
receive bandwidth part (BWP) information from a base station via a radio resource control (RRC) signaling;
receive downlink control information (DCI) including information related to dormancy from the base station; and
activate a specific BWP on the secondary cell based on the DCI,
wherein, based on a current active BWP being a dormant BWP, the DCI informs the activation of the specific BWP provided based on the BWP information via the RRC signaling, and
wherein a BWP inactivity timer is not used for transitioning from the dormant BWP, which is activated, to a default BWP.