Method and an apparatus for transmitting messages in home network system

A device for transmitting a packet in a high definition base transmission (HDBaseT) system, the device comprises:

• a packetizer;
• a transmitter (Tx);
• and
• a receiver (Rx);
• wherein the device is configured to:
• receive data from a source device using the Rx;
• convert the received data to the packet using the packetizer in order to transmit the converted packet to a reception adaptor through an HDBaseT network;
• transmit the packet to the reception adaptor using the Tx;
• the packet includes a four level hierarchical identifier for identifying HDBaseT entities to which the packet is to be transmitted, and
• the four level hierarchical identifier includes a device medium access control (MAC) address field for identifying a device management entity of an HDBaseT device, a port identifier field for identifying a port device associated with the HDBaseT device, an HDBaseT group (T group) identifier field for identifying a T group associated with the port device, and a type mask field for identifying one or more HDBaseT adaptors (T adaptors) associated with the T group.