Method and apparatus for adjusting uplink timing in a wireless communication system

A base station for adjustment of uplink timing in a wireless communication system, the base station comprising:

• a transceiver;
• at least one processor;
• and
• at least one memory operatively connected to the at least one processor,
• wherein the at least one memory stores instructions that, based on being executed by the at least one processor, perform operations comprising:
• receiving, from a user equipment, a first uplink signal;
• transmitting, to the user equipment, a timing advance (TA) command based on the first uplink signal;
• receiving, from the user equipment, a second uplink signal in a timing determined by a timing advance (TA) value of the TA command;
• and
• wherein the TA command is based on a maximum subcarrier spacing, among subcarrier spacings related with frequency resource regions for the user equipment, and
• wherein a maximum value of the TA value is based on a minimum subcarrier spacing, among the subcarrier spacings.

An apparatus for adjustment of uplink timing in a wireless communication system, the apparatus comprising:

• at least one processor;
• and
• at least one memory operatively connected to the at least one processor,
• wherein the at least one processor is configured to:
• receive a first uplink signal;
• transmit a timing advance (TA) command based on the first uplink signal;
• receive a second uplink signal in a timing determined by a timing advance (TA) value of the TA command;
• and
• wherein the TA command is based on a maximum subcarrier spacing, among subcarrier spacings related with frequency resource regions for the user equipment, and
• wherein a maximum value of the TA value is based on a minimum subcarrier spacing, among the subcarrier spacings.