Method and apparatus for performing discontinuous reception operation by connected mode user equipment in a mobile communication system

A terminal in a wireless communication system, the terminal comprising:

• a transceiver;
• and
• a controller configured to:
• receive via the transceiver, from a base station, information associated with a dedicated preamble on a downlink control channel, the terminal being in a radio resource control (RRC) connected mode,
• transmit via the transceiver, to the base station, the dedicated preamble based on the information associated with the dedicated preamble,
• receive via the transceiver, from the base station, a message as a response to the dedicated preamble, the message including information on a timing adjustment and information on a channel quality indicator (CQI),
• perform uplink timing adjustment based on the information on the timing adjustment, and
• transmit via the transceiver, to the base station, the CQI based on the information on the CQI.

A method performed by a base station in a wireless communication system, the method comprising:

• transmitting, to a terminal, information associated with a dedicated preamble on a downlink control channel, the terminal being in a radio resource control (RRC) connected mode;
• receiving, from the terminal, the dedicated preamble based on the information associated with the dedicated preamble;
• transmitting, to the terminal, a message as a response to the dedicated preamble, the message including information on a timing adjustment and information on a channel quality indicator (CQI), the information on the timing adjustment being used to perform uplink timing adjustment;
• and
• receiving, from the terminal, the CQI based on the information on the CQI.

A base station in a wireless communication system, the base station comprising:

• a transceiver;
• and
• a controller configured to:
• transmit via the transceiver, to a terminal, information associated with a dedicated preamble on a downlink control channel, the terminal being in a radio resource control (RRC) connected mode,
• receive via the transceiver, from the terminal, the dedicated preamble based on the information associated with the dedicated preamble,
• transmit via the transceiver, to the terminal, a message as a response to the dedicated preamble, the message including information on a timing adjustment and information on a channel quality indicator (CQI), the information on the timing adjustment being used to perform uplink timing adjustment, and
• receive via the transceiver, from the terminal, the CQI based on the information on the CQI.