Method for operating user equipment in wireless communication system, and device therefor
Provided are a method for operating user equipment (UE) having multiple serving cells set therefor in a wireless communication system and UE using the method. The method comprises: receiving a higher-level signal indicating a mapping between the values of the serving cell index (ServingCellID) of a serving cell and a carrier index field (CIF); and identifying the serving cell on the basis of the higher-level signal.
1. A method for operating a user equipment (UE) in a wireless communication system, the method comprising:
receiving a higher layer signal informing a first carrier index field (CIF) value, wherein the first CIF value is used in a first scheduling cell included in a first cell group to indicate a first scheduled cell included in the first cell group;
receiving another higher layer signal informing a second CIF value, wherein the second CIF value is used in a second scheduling cell included in a second cell group to indicate a second scheduled cell included in the second cell group;
monitoring physical downlink control channel (PDCCH) candidates for the first scheduled cell in the first scheduling cell based on the first CIF value informed by the higher layer signal; and
monitoring PDCCH candidates for the second scheduled cell in the second scheduling cell based on the second CIF value informed by the other higher layer signal,
wherein a number of candidates of the first CIF value is smaller than a number of candidates of a serving cell index of the first scheduled cell, and
wherein a number of candidates of the second CIF value is smaller than a number of candidates of a serving cell index of the second scheduled cell.
2. The method of claim 1 , wherein the carrier index field comprises 3 bits.
3. The method of claim 1 , wherein the higher layer signal is a radio resource control (RRC) message.
4. A user equipment (UE) in a wireless communication system, the UE comprising:
a transceiver; and
a processor operatively connected to the transceiver and configured to:
receive a higher layer signal informing a first carrier index field (CIF) value, wherein the first CIF value is used in a first scheduling cell in a first cell group to indicate a first scheduled cell included in the first cell group;
receive another higher layer signal informing a second CIF value, wherein the second CIF value is used in a second scheduling cell included in a second cell group to indicate a second scheduled cell included in the second cell group;
monitor physical downlink control channel (PDCCH) candidates for the first scheduled cell in the first scheduling cell based on the first CIF value informed by the higher layer signal; and
monitor PDCCH candidates for the second scheduled cell in the second scheduling cell based on the second CIF value informed by the other higher layer signal,
wherein a number of candidates of the first CIF value is smaller than a number of candidates of a serving cell index of the first scheduled cell, and
wherein a number of candidates of the second CIF value is smaller than a number of candidates of a serving cell index of the second scheduled cell.
5. The UE of claim 4 , wherein the carrier index field comprises 3 bits.
6. The UE of claim 4 , wherein the higher layer signal is a radio resource control (RRC) message.