Method and apparatus for controlling timing advance

A method for controlling a timing advance (TA) by a base station in a communication system, the method comprising:

• transmitting information for uplink data to a terminal;
• and
• receiving the uplink data from the terminal,
• wherein the uplink data is received after being delayed by a round trip delay from an uplink transmission timing determined based on a TA value,
• wherein the TA value is selected from among a plurality of TA values based on a coverage class, the coverage class being one of a plurality of coverage classes in a cell, and
• wherein each of the plurality of coverage classes is assigned with a different TA value for an uplink transmission to the base station.

A terminal for controlling a timing advance (TA) in a communication system, the terminal comprising:

• a transceiver;
• and
• a processor configured to:
• select a cell, wherein the selected cell includes a plurality of coverage classes,
• select a coverage class from among the plurality of coverage classes in the selected cell, wherein each of the plurality of coverage classes is assigned with a different TA value for an uplink transmission to a base station,
• select a TA value from among a plurality of TA values based on the selected coverage class,
• determine an uplink transmission timing based on the selected TA value, and
• control the transceiver to transmit uplink data at the determined uplink transmission timing.

A base station for controlling a timing advance (TA) in a communication system, the base station comprising:

• a transceiver;
• and
• a processor configured to control the transceiver to:
• transmit information for uplink data to a terminal;
• and
• receive the uplink data from the terminal,
• wherein the uplink data is received after being delayed by a round trip delay from an uplink transmission timing determined based on a TA value,
• wherein the TA value is selected from among a plurality of TA values based on a coverage class, the coverage class being one of a plurality of coverage classes in a cell, and
• wherein each of the plurality of coverage classes is assigned with a different TA value for an uplink transmission to the base station.