Relating to power control in integrated access and backhaul

An integrated access and backhaul (IAB) node in an IAB wireless communication system, the IAB node comprising:

• a transceiver;
• and
• a processor configured to:
• control the transceiver to receive, from a base station, a system information block (SIB) including first information on a first physical random access channel (PRACH) configuration index for a terminal, second information on a second PRACH configuration index for an IAB node and third information on a PRACH offset for the IAB node,
• identify resources based on the second information on the second PRACH configuration index for the IAB node and the third information on the PRACH offset for the IAB node, and
• control the transceiver to transmit, to the base station, a random access preamble on the identified resources,
• wherein the third information on the PRACH offset for the IAB node includes at least one of a first offset value on a slot, a second offset value on a subframe, or a third offset value on a radio frame,
• wherein the base station is a donor IAB node.

A method performed by a base station in an integrated access and backhaul (IAB) wireless communication system, the method comprising:

• broadcasting a system information block (SIB) including first information on a first physical random access channel (PRACH) configuration index for a terminal, second information on a second PRACH configuration index for an IAB node, and third information on the PRACH offset for the IAB node, and
• receiving, from the IAB node, a random access preamble on resources identified based on the second information on the second PRACH configuration index for the IAB node and the third information on the PRACH offset for the IAB node,
• wherein the third information on the PRACH offset for the IAB node includes at least one of a first offset value on a slot, a second offset value on a subframe and a third offset value on a radio frame, and
• wherein the base station is a donor IAB node.

A method performed by an integrated access and backhaul (IAB) node in an IAB wireless communication system, the method comprising:

• receiving, from a base station, a system information block (SIB) including first information on a first physical random access channel (PRACH) configuration index for a terminal, second information on a second PRACH configuration index for an IAB node and third information on a PRACH offset for the IAB node,
• identifying resources based on the second information on the second PRACH configuration index for the IAB node and the third information on the PRACH offset for the IAB node, and
• transmitting, to the base station, a random access preamble on the identified resources,
• wherein the third information on the PRACH offset for the IAB node includes at least one of a first offset value on a slot, a second offset value on a subframe, or a third offset value on a radio frame,
• wherein the base station is a donor IAB node.