Method and apparatus for controlling logical channel priority for delay critical data in mobile communication system

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

• transmitting, to a terminal, a message comprising information on a priority for a logical channel, information on an additional priority for the logical channel, and information on a threshold for determining whether the additional priority is applied for the logical channel;
• and
• receiving, from the terminal, uplink data based on a priority order of logical channels,
• wherein, in case that a remaining time of a packet data convergence protocol (PDCP) service data unit (SDU) of the logical channel is less than the threshold, the additional priority of the logical channel is applied.

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

• a transceiver;
• and
• a controller coupled with the transceiver and configured to:
• receive, from a base station, a message comprising information on a priority for a logical channel, information on an additional priority for the logical channel, and information on a threshold for determining whether the additional priority is applied for the logical channel,
• determine whether a remaining time of a packet data convergence protocol (PDCP) service data unit (SDU) of the logical channel is less than the threshold, and
• in case that the remaining time of the PDCP SDU of the logical channel is less than the threshold, apply the additional priority of the logical channel.

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

• a transceiver;
• and
• a controller coupled with the transceiver and configured to:
• transmit, to a terminal, a message comprising information on a priority for a logical channel, information on an additional priority for the logical channel, and information on a threshold for determining whether the additional priority is applied for the logical channel, and
• receive, from the terminal, uplink data based on a priority order of logical channels,
• wherein, in case that a remaining time of a packet data convergence protocol (PDCP) service data unit (SDU) of the logical channel is less than the threshold, the additional priority of the logical channel is applied.