| CPC H04W 76/15 (2018.02) [H04W 16/24 (2013.01); H04W 24/10 (2013.01); H04W 88/02 (2013.01); H04W 88/023 (2013.01); H04W 88/08 (2013.01); H04W 76/27 (2018.02); Y02D 30/70 (2020.08)] | 18 Claims |

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1. A method performed by a base station in a wireless communication system supporting a carrier aggregation (CA), the method comprising:
generating a cell list including first information on one or more secondary cells (SCells) of the CA and second information on at least one SCell, wherein the one or more SCells and a primary cell (PCell) of the CA belong to a same cell group and the at least one Scell does not belong to the same cell group with the PCell;
transmitting, to a terminal, a measurement report command including configuration information related to the cell list; and
receiving, from the terminal, a measurement report for the one or more SCells belonging to the same cell group as the PCell,
wherein the same cell group indicates that the PCell and the one or more SCells are capable of transmitting and receiving traffic to and from each other,
wherein the one or more SCells belonging to the same cell group are associated with an entity of the PCell, the entity including one of at least one hardware of the base station or an inter-cell traffic switch, and
wherein the second information indicates a number of measurement reports and a time, during a period that the at least one SCell is not included in the cell list.
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