A communication apparatus includes a processor coupled to a memory. The memory is configured to store non-transitory instructions. The processor is configured to execute the non-transitory instructions to thereby cause the communication apparatus to perform operations including sending first information to a target integrated access and backhaul (IAB) donor of an IAB node, and receiving second information from the target IAB donor. The first information includes request information useable for setting up a first F1 interface. The second information includes feedback information of the request information. The first F1 interface is a communication interface between a distributed unit (DU) of the IAB node and a central unit (CU) of the target IAB donor. The communication apparatus is a source IAB donor of the IAB node or included in a IAB donor.