Method and apparatus for performing communication in a wireless communication system

A method by an user equipment (UE) in a wireless communication system, the method comprising:

• receiving, from a base station (BS) by the UE, configuration information related to a measurement gap during which the UE does not transmit uplink data;
• identifying a subframe of the measurement gap based on the configuration information;
• starting the measurement gap at an end of a subframe occurring immediately before the measurement gap based on the identified subframe;
• and
• performing an operation in a subframe immediately after the measurement gap, if the subframe occurring immediately before the measurement gap is a downlink subframe.

An apparatus of a user equipment (UE) to perform communication in a wireless communication system, the apparatus comprising:

• a transceiver configured to receive configuration information related to a measurement gap during which the UE does not transmit uplink data;
• and
• a controller configured to:
• identify a subframe of the measurement gap based on the configuration information,
• start the measurement gap at an end of a subframe occurring immediately before the measurement gap based on the identified subframe, and
• control the transceiver to perform an operation in a subframe immediately after the measurement gap if the subframe occurring immediately before the measurement gap is a downlink subframe.

An apparatus of a base station (BS) to perform communication in a wireless communication system, the apparatus comprising:

• a transceiver configured to transmit, to a user equipment (UE), configuration information related to a measurement gap during which the UE does not transmit uplink data;
• and
• a controller configured to:
• identify a subframe included in the measurement gap based on the configuration information, and
• if a subframe immediately before the measurement gap is a downlink subframe, block the transceiver from monitoring an uplink transmission from the UE in an uplink subframe immediately after the measurement gap, wherein the measurement gap is started at an end of a subframe occurring immediately before the measurement gap.