Method and apparatus for network controlled repeater in wireless communication system

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

• transmitting, to a repeater via a higher layer signaling, configuration information for a transmission on an access link, the configuration information including a first beam index;
• and
• transmitting, to the repeater via physical downlink control channel (PDCCH), control information indicating a second beam index,
• wherein the repeater performs the transmission on the access link with a user equipment (UE) based on the second beam index, in case that the configuration information does not include a value, and
• wherein the repeater performs the transmission or on the access link with the UE based on the first beam index, in case that the configuration information includes the value.

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

• a transceiver;
• and
• at least one controller coupled to the transceiver, the at least one controller configured to:
• receive, from a base station via a higher layer signaling, configuration information for a transmission on an access link, the configuration information including a first beam index,
• receive, from the base station via physical downlink control channel (PDCCH), control information indicating a second beam index,
• perform the transmission on the access link with a user equipment (UE) based on the second beam index, in case that the configuration information does not include a value, and
• perform the transmission on the access link with the UE based on the first beam index, in case that the configuration information includes the value.

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

• a transceiver;
• and
• at least one controller coupled to the transceiver, the at least one controller configured to:
• transmit, to a repeater via a higher layer signaling, configuration information for a transmission on an access link, the configuration information including a first beam index,
• transmit, to a repeater via physical downlink control channel (PDCCH), control information indicating a second beam index, and
• wherein the repeater performs the transmission on the access link with a user equipment (UE) based on the second beam index, in case that the configuration information does not include a value, and
• wherein the repeater performs the transmission on the access link with the UE based on the first beam index, in case that the configuration information includes the value.