Method and device for determining downlink transmission timing for relay node in next generation communication system

An integrated access and backhaul (IAB) node comprising:

• at least one processor;
• and
• at least one computer memory storing instructions that, when executed by the at least one processor, cause the IAB node to perform operations comprising:
• receiving first information related to a timing offset from a serving cell;
• determining a time difference between a transmission time of a signal from the serving cell and a reception time of the signal by the IAB node based on second information related to a timing advance (TA) for the serving cell and the first information;
• and
• determining a downlink transmission time based on the time difference.

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

• at least one processor;
• and
• at least one computer memory storing instructions that, when executed by the at least one processor, cause the IAB node to perform operations comprising:
• receiving first information related to a timing offset from a serving cell;
• determining a time difference between a transmission time of a signal from the serving cell and a reception time of the signal by the IAB node based on second information related to a timing advance (TA) for the serving cell and the first information;
• and
• determining a downlink transmission time based on the time difference.

A non-transitory computer readable storage medium comprising program instructions that, when executed by at least one processor, cause an integrated access and backhaul (IAB) node to perform operations comprising:

• receiving first information related to a timing offset from a serving cell;
• determining a time difference between a transmission time of a signal from the serving cell and a reception time of the signal by the IAB node based on second information related to a timing advance (TA) for the serving cell and the first information;
• and
• determining a downlink transmission time based on the time difference.