Method and apparatus for communication in wireless mobile communication system

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

• receiving, from a terminal which received a first radio resource control (RRC) connection release message associated with a suspension, a random access preamble associated with uplink data for the terminal, wherein the first RRC connection release message includes a resume identity;
• transmitting, to the terminal, a random access response including timing alignment information and an uplink grant;
• receiving, from the terminal, a medium access control (MAC) protocol data unit (PDU) including the uplink data and an RRC connection resume request message, the RRC connection resume request message including the resume identity;
• and
• transmitting, to the terminal, an RRC message as a response to the RRC connection resume request message,
• wherein the random access preamble is selected from a preamble group for transmitting the uplink data associated with a data radio bearer (DRB).

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

• a transceiver;
• and
• a controller configured to:
• receive, via the transceiver, a first radio resource control (RRC) connection release message associated with a suspension, the first RRC connection release message including a resume identity;
• in case that uplink data occurs, transmit, to a base station via the transceiver, a random access preamble;
• receive, from the base station via the transceiver, a random access response including timing alignment information and an uplink grant;
• transmit, to the base station via the transceiver, a medium access control (MAC) protocol data unit (PDU) including the uplink data and an RRC connection resume request message, the RRC connection resume request message including the resume identity;
• and
• receive, from the base station via the transceiver, an RRC message as a response to the RRC connection resume request message,
• wherein the random access preamble is selected from a preamble group for transmitting the uplink data associated with a data radio bearer (DRB).

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

• a transceiver;
• and
• a controller configured to:
• receive, via the transceiver from a terminal which received a first radio resource control (RRC) connection release message associated with a suspension, a random access preamble associated with uplink data for the terminal, wherein the first RRC connection release message includes a resume identity;
• transmit, to the terminal via the transceiver, a random access response including timing alignment information and an uplink grant;
• receive, from the terminal via the transceiver, a medium access control (MAC) protocol data unit (PDU) including the uplink data and an RRC connection resume request message, the RRC connection resume request message including the resume identity;
• and
• transmit, to the terminal via the transceiver, an RRC message as a response to the RRC connection resume request message,
• wherein the random access preamble is selected from a preamble group for transmitting the uplink data associated with a data radio bearer (DRB).