Device and method for fronthaul transmission in wireless communication system

A method performed by a radio unit (RU), the method comprising:

• receiving, from a distributed unit (DU), a control plane (C-plane) message including section information with a section extension for multiple ports;
• and
• identifying the section information and the section extension included in the C-plane message,
• wherein the section information includes information on a beam identifier (ID) for a representative port of the multiple ports, and
• wherein the section extension includes:
• beam group type information, and
• information on a number N of extended antenna-carrier (eAxC) ports indicated by the section extension.

A device of a distributed unit (DU), the device comprising:

• at least one transceiver;
• and
• at least one processor configured to:
• generate a control plane (C-plane) message including section information with a section extension for multiple ports, and
• transmit the C-plane message to a radio unit (RU),
• wherein the section information includes information on a beam identifier (ID) for a representative port of the multiple ports, and
• wherein the section extension includes:
• beam group type information, and
• information on a number N of extended antenna-carrier (eAxC) ports indicated by the section extension.

A device of a radio unit (RU), the device comprising:

• at least one transceiver;
• and
• at least one processor configured to:
• receive, from a distributed unit (DU), a control plane (C-plane) message including section information with a section extension for multiple ports, and
• identify the section information and the section extension included in the C-plane message,
• wherein the section information includes information on a beam identifier (ID) for a representative port of the multiple ports, and
• wherein the section extension includes:
• beam group type information, and
• information on a number N of extended antenna-carrier (eAxC) ports indicated by the section extension.