Method and apparatus for switching bandwidth part in new radio

1. A method of switching a bandwidth part (BWP) by a user equipment (UE), the method comprising:

transmitting information on physical layer capability, which includes information on a BWP switching delay type;

receiving downlink control information (DCI) including a BWP indication field that indicates one BWP different from an active BWP among BWPs included in a BWP set configured for the UE, and scheduling control information for a data channel;

activating a BWP indicated by a value of the BWP indication field in consideration of a transition time determined by the information on the BWP switching delay type; and

transceiving the data channel according to the scheduling control information,

wherein the activating the BWP comprises:

activating the indicated BWP when transmission time of the data channel according to the scheduling control information is after passing the transition time from a reception time of the DCI.

2. The method according to claim 1 , wherein the BWP indication field comprises a number of bits determined by the number of BWPs included in the BWP set configured by the BWP configuration information received through higher layer signaling.

3. The method according to claim 2 , wherein the value of the BWP indication field is determined by log 2(N) bit or log 2(N+1) bit when the number of BWPs is N.

4. The method according to claim 1 , wherein whether to include the BWP indication field in the DCI is determined according to DCI format.

5. The method according to claim 1 , wherein the activating the BWP comprises:

maintaining activating the active BWP when the transmission time of the data channel according to the scheduling control information is before passing the transition time from the reception time of the DCI.

6. A method of switching bandwidth part (BWP) by a base station (BS), the method comprising:

receiving information on physical layer capability that includes information on a BWP switching delay type, from a UE;

transmitting downlink control information (DCI) including a BWP indication field that indicates one BWP different from an active BWP among BWPs included in a BWP set configured for the UE, and scheduling control information for a data channel; and

transceiving the data channel according to the scheduling control information if a BWP indicated by a value of the BWP indication field is activated in consideration of a transition time determined by the information on the BWP switching delay type,

wherein the transceiving the data channel comprises:

transmitting and receiving the data channel if the BWP indicated by the value of the BWP indication field is activated when transmission time of the data channel according to the scheduling control information is after passing the transition time from a reception time of the DCI.

7. The method according to claim 6 , wherein the BWP indication field comprises a number of bits determined by the number of BWPs included in the BWP set configured by the BWP configuration information received through higher layer signaling.

8. The method according to claim 7 , wherein the value of the BWP indication field is determined by log 2(N) bit or log 2(N+1) bit when the number of BWPs is N.

9. The method according to claim 6 , wherein whether to include the BWP indication field in the DCI is determined according to DCI format.

10. The method according to claim 6 , wherein the transceiving the data channel comprises:

transmitting and receiving the data channel through the BWP in which the activation is maintained when the transmission time of the data channel according to the scheduling control information is before passing the transition time from the reception time of the DCI.

11. A user equipment (UE) for switching bandwidth part (BWP), the UE comprising

a transmitter configured to transmit information on physical layer capability comprising information on a BWP switching delay type;

a receiver configured to receive downlink control information (DCI) comprising a BWP indication field that indicates one BWP different from an active BWP among BWPs included in a BWP set configured for the UE, and scheduling control information for a data channel; and

a controller configured to activate the BWP indicated by a value of the BWP indication field in consideration of a transition time determined by the information on the BWP switching delay type, and controls the transmitter and the receiver to transmit and receive the data channel according to the scheduling control information,

wherein the controller activates the BWP indicated by the value of the BWP indication field when the transmission time of the data channel according to the scheduling control information is after transition time has elapsed based on reception time of the DCI.

12. The UE according to claim 11 , wherein the BWP indication field comprises a number of bits determined by the number of BWPs included in the BWP set configured by the BWP configuration information received through higher layer signaling.

13. The UE according to claim 12 , wherein the value of the BWP indication field is determined by log 2(N) bit or log 2(N+1) bit when the number of BWPs is N.

14. The UE according to claim 11 , wherein whether to include the BWP indication field in the DCI is determined according to DCI format.

15. The UE according to claim 11 , wherein the controller maintains activating the active BWP when the transmission time of the data channel according to the scheduling control information is before passing the transition time from the reception time of the DCI.