Dynamic control method and device of SCell in mobile communication system

A base station (eNB) in a mobile communication system, comprising:

• a transceiver configured to transmit and receive signals;
• and
• a controller configured to:
• control a process of identifying a carrier aggregation (CA) operation mode determined based on whether to use a measurement report received from a user equipment (UE) to determine addition or release of a secondary cell (S Cell),
• identify an amount of traffic for the UE,
• determine whether to add the SCell in the UE based on the CA operation mode and the traffic amount for the UE, and
• control the transceiver to transmit an SCell addition request message to the UE according to the determination result.

A method of configuring a secondary cell (SCell) for a user equipment (UE), the method comprising:

• maintaining a connection to at least one cell of a base station (eNB);
• determining whether to perform a cell measurement based on a carrier aggregation (CA) operation mode to determine addition or release of the SCell;
• receiving an SCell addition request message for the UE from the eNB;
• and
• configuring an SCell in the UE based on the SCell addition request message,
• wherein the SCell addition request message is based on the CA operation mode and an amount of traffic for the UE.

A user equipment (UE) comprising:

• a transceiver configured to transmit and receive signals;
• and
• a controller configured to control a process of:
• maintaining a connection to at least one cell of a base station (eNB), receiving a secondary cell (SCell) addition request message from the eNB,
• determining whether to perform a cell measurement based on a carrier aggregation (CA) operation mode to determine addition or release of the SCell, and
• configuring an SCell in the UE based on the SCell addition request message,
• wherein the SCell addition request message is determined based on a carrier aggregation (CA) operation mode and an amount of traffic for the UE.