Method for transmitting control signaling in relay network, configuration method and device

A method performed by a first integrated access and backhaul (IAB) node for a distributed unit (DU) in a communication system, the method comprising:

• receiving, from a central unit (CU) of a donor node, a configuration message including:
• address information of a receiving node over a backhaul link channel,
• channel identification information for the backhaul link channel, wherein the backhaul link channel comprises a radio link control (RLC) channel used for a link between the first TAB node and the receiving node, and
• indication information for indicating a type of information carried over the backhaul link channel, wherein the type of information is one of types including a user equipment (UE) associated F1 application protocol (F1AP) signaling or a non-UE associated F1AP signaling, and
• receiving, from the CU of the donor node, a radio resource control (RRC) reconfiguration message including identification information of a logical channel corresponding to the backhaul link channel and information about priority of the logical channel corresponding to the backhaul link channel.

A central unit (CU) of a donor node in a communication system, the CU comprising:

• at least one transceiver;
• and
• at least one processor coupled to the at least one transceiver, configured to:
• generate a configuration message including:
• address information of a receiving node over a backhaul link channel, and
• channel identification information for the backhaul link channel, wherein the backhaul link channel comprises a radio link control (RLC) channel used for a link between a first integrated access and backhaul (IAB) node of a distributed unit (DU) and the receiving node, and
• indication information for indicating a type of information carried over the backhaul link channel, wherein the type of information is one of types including a user equipment (UE) associated F1 application protocol (F1AP) signaling or a non-UE associated F1AP signaling;
• and
• transmit, to the first IAB node via the at least one transceiver, the configuration message,
• transmit, to the first IAB node, a radio resource control (RRC) reconfiguration message including identification information of a logical channel corresponding to the backhaul link channel and information about priority of the logical channel corresponding to the backhaul link channel.

A first integrated access and backhaul (IAB) node for a distributed unit (DU) in a communication system, the IAB node comprising:

• at least one transceiver;
• and
• at least one processor coupled to the at least one transceiver, configured to control the at least one transceiver to:
• receive, from a central unit (CU) of a donor node, a configuration message including:
• address information of a receiving node over a backhaul link channel,
• channel identification information for the backhaul link channel, wherein the backhaul link channel comprises a radio link control (RLC) channel used for a link between the first IAB node and the receiving node, and
• indication information for indicating a type of information carried over the backhaul link channel, wherein the type of information is one of types including a user equipment (UE) associated F1 application protocol (F1AP) signaling or a non-UE associated F1AP signaling, and
• receive, from the CU of the donor node, a radio resource control (RRC) reconfiguration message including identification information of a logical channel corresponding to the backhaul link channel and information about priority of the logical channel corresponding to the backhaul link channel.