A method for initiating a session of a High Definition Base T, HDBaseT, network, the method comprising: transmitting (S1210, S1310, S1410, S1510, S1610a, S1610b, S1710), over an Ethernet by an initiation entity to a session partner selected by the initiation entity, a session initiation request message for initiating the session of the network; and receiving (S1220, S1320, S1420, S1520, S1620a, S1620b, S1720), by the initiation entity from the session partner over the Ethernet, a session initiation response message acting as a response to the session initiation request message, wherein the HDBaseT network provides a transmission of uncompressed High Definition, HD, video and audio signals, a simultaneous transmission of multiple streams, and a power transmission through a single cable, wherein the session initiation request message includes a first source entity reference field for identifying the initiation entity and a first final target reference field for identifying the session partner, wherein the first source entity reference field includes a Medium Access Control, MAC, address for identifying a management entity contained in the initiation entity and a group port identifier, TPG ID, for identifying a port of the initiation entity, and wherein the first final target reference field includes a Medium Access Control, MAC, address for identifying a management entity contained in the session partner and a group port identifier, TPG ID, for identifying a port of the session partner, and wherein the session of the network supports multiple interfaces, in addition to the Ethernet, including a High Definition Multimedia Interface, HDMI, and a Universal Serial Bus, USB, through the single cable. transmitting (S1210, S1310, S1410, S1510, S1610a, S1610b, S1710), over an Ethernet by an initiation entity to a session partner selected by the initiation entity, a session initiation request message for initiating the session of the network; and receiving (S1220, S1320, S1420, S1520, S1620a, S1620b, S1720), by the initiation entity from the session partner over the Ethernet, a session initiation response message acting as a response to the session initiation request message, wherein the HDBaseT network provides a transmission of uncompressed High Definition, HD, video and audio signals, a simultaneous transmission of multiple streams, and a power transmission through a single cable, wherein the session initiation request message includes a first source entity reference field for identifying the initiation entity and a first final target reference field for identifying the session partner, wherein the first source entity reference field includes a Medium Access Control, MAC, address for identifying a management entity contained in the initiation entity and a group port identifier, TPG ID, for identifying a port of the initiation entity, and wherein the first final target reference field includes a Medium Access Control, MAC, address for identifying a management entity contained in the session partner and a group port identifier, TPG ID, for identifying a port of the session partner, and wherein the session of the network supports multiple interfaces, in addition to the Ethernet, including a High Definition Multimedia Interface, HDMI, and a Universal Serial Bus, USB, through the single cable. <EOS>