Apparatus and method for transmitting/receiving activation indicator regarding component carrier in wireless communication system

A method for supporting activation/deactivation of serving cells by a base station (eNode B) in a wireless communication system, the method comprising:

• transmitting, to a user equipment (UE), a serving cell configuration comprising one or more indices to configure one or more serving cells through radio resource control (RRC);
• determining activation or deactivation of each serving cell which is configured in the UE;
• setting the determined activation or deactivation to 1 bit indicator, wherein the activation is set to 1 and the deactivation is set to 0;
• and
• transmitting, to the UE, a medium access control (MAC) signal comprising a logical channel identifier (LCID) and indicators for the one or more serving cells configured in the UE in a bit-stream consisting of eight bits, the LCID having a value indicating that the MAC signal comprises the indicators for the one or more serving cells configured in the UE,
• wherein the bit-stream comprises at least one reserved bit not available for the indicators for the one or more serving cells configured in the UE, and wherein remaining bits of the bit-stream correspond to the indicators for the serving cell configured in the UE, and
• wherein the activation instructs the UE to monitor reception of at least one of a control channel and the deactivation instructs the UE to stop monitoring reception of at least one of the control channel.

A user equipment (UE) to support activation/deactivation of serving cells in a wireless communication system, the user equipment comprising:

• reception processing unit to receive a serving cell configuration comprising one or more indices to configure one or more serving cells through radio resource control (RRC) and a medium access control (MAC) signal from a base station(eNB);
• an activation group confirming unit to confirm by a logical channel identifier (LCID) that an indicator is included in the received MAC signal, and confirming that the indicator indicates activation/deactivation of each serving cell configured in the UE by using a MAC control element (MAC CE) having a bit-stream consisting of eight bits;
• and
• an information analysis unit to activate a corresponding serving cell if the confirmed indicator is 1 or deactivate the corresponding serving cell if the confirmed indicator is 0 and receive a downlink control channel or a downlink data channel from the eNB or transmit an uplink data channel to the eNB by using the activated serving cell based on the confirmed indicator,
• wherein the bit-stream comprises at least one reserved bit not available for the indicators for the one or more serving cells configured in the UE, and wherein remaining bits of the bit-stream correspond to the indicators for the serving cell configured in the UE.

A base station (eNB) for supporting activation/deactivation of serving cells in a wireless communication system, the eNB comprising:

• a transceiver to transmit, to a user equipment (UE), a serving cell configuration comprising one or more indices to configure one or more serving cells through radio resource control (RRC);
• and
• a controller to determine activation or deactivation of each serving cell which is configured in the UE and setting the determined activation or deactivation to 1 bit indicator, wherein the activation is set to 1 and the deactivation is set to 0;
• wherein the transceiver transmits, to the UE, a medium access control signal comprising a logical channel identifier (LCID) and indicators for the one or more serving cells configured in the UE in a bit-stream consisting of eight bits, the LCID having a value indicating that the medium access control signal comprises the indicators for the one or more serving cells configured in the UE,
• wherein the bit-stream comprises at least one reserved bit not available for the indicators for the one or more serving cells configured in the UE, and wherein remaining bits of the bit-stream correspond to the indicators for the serving cell configured in the UE, and
• wherein the activation instructs the UE to monitor reception of at least one of a control channel and the deactivation instructs the UE to stop monitoring reception of at least one of the control channel.