User equipment (102, 104) configured to communicate with a network gateway via a communication path (f1, f2) associated with a first radio access technology, RAT, comprising: a memory having computer-readable instruction stored therein; and a processor configured to execute the computer-readable instructions to identify a plurality of communication paths (f3-f6) available to at least one intermediate network node (116, 118) for data transmission between the user equipment and a network gateway by, transmitting (S503-1, S503-4) a first add interface message to at least one intermediate network node (116, 118) using a second RAT for the at least one intermediate network node to forward the first add interface message to the network gateway over a default communication path (f3, f5) associated with the at least one intermediate network node, the first add interface message identifying the default communication path for the network gateway, receiving (S508-1, S508-2) a response message from the at least one intermediate network node, the response message identifying at least one additional communication path (f4, f6) associated with the at least one intermediate network node, and transmitting (S513-1, 5513-4) a second add interface message to the at least one intermediate network node using the second RAT for the at least one intermediate network node to forward the second add interface message to the network gateway, the second add interface message identifying the at least one additional communication path for the network gateway, and establish a data transmission session between the user equipment and the network gateway simultaneously over the communication paths by at least one of receiving during a downlink transmission, and transmitting during an uplink transmission, (5518-1 - S518-14) data packets each including a different portion of data associated with the data transmission session over each of the communication paths. a memory having computer-readable instruction stored therein; and a processor configured to execute the computer-readable instructions to identify a plurality of communication paths (f3-f6) available to at least one intermediate network node (116, 118) for data transmission between the user equipment and a network gateway by, transmitting (S503-1, S503-4) a first add interface message to at least one intermediate network node (116, 118) using a second RAT for the at least one intermediate network node to forward the first add interface message to the network gateway over a default communication path (f3, f5) associated with the at least one intermediate network node, the first add interface message identifying the default communication path for the network gateway, receiving (S508-1, S508-2) a response message from the at least one intermediate network node, the response message identifying at least one additional communication path (f4, f6) associated with the at least one intermediate network node, and transmitting (S513-1, 5513-4) a second add interface message to the at least one intermediate network node using the second RAT for the at least one intermediate network node to forward the second add interface message to the network gateway, the second add interface message identifying the at least one additional communication path for the network gateway, and establish a data transmission session between the user equipment and the network gateway simultaneously over the communication paths by at least one of receiving during a downlink transmission, and transmitting during an uplink transmission, (5518-1 - S518-14) data packets each including a different portion of data associated with the data transmission session over each of the communication paths. identify a plurality of communication paths (f3-f6) available to at least one intermediate network node (116, 118) for data transmission between the user equipment and a network gateway by, transmitting (S503-1, S503-4) a first add interface message to at least one intermediate network node (116, 118) using a second RAT for the at least one intermediate network node to forward the first add interface message to the network gateway over a default communication path (f3, f5) associated with the at least one intermediate network node, the first add interface message identifying the default communication path for the network gateway, receiving (S508-1, S508-2) a response message from the at least one intermediate network node, the response message identifying at least one additional communication path (f4, f6) associated with the at least one intermediate network node, and transmitting (S513-1, 5513-4) a second add interface message to the at least one intermediate network node using the second RAT for the at least one intermediate network node to forward the second add interface message to the network gateway, the second add interface message identifying the at least one additional communication path for the network gateway, and establish a data transmission session between the user equipment and the network gateway simultaneously over the communication paths by at least one of receiving during a downlink transmission, and transmitting during an uplink transmission, (5518-1 - S518-14) data packets each including a different portion of data associated with the data transmission session over each of the communication paths.