Abstract: A network array (100) comprises a first network (101) having a plurality of first nodes (103, 104, 109), comprises a second network (102) having a plurality of second nodes (106, 109), and comprises a forwarder node (109). The forwarder node (109) constitutes one of the first nodes (103, 104, 109) and constitutes one of the second nodes (106, 109) to form a communication interface between the first network (101) and the second network (102). The forwarder node (109) has an implemented data transmission scheduling management function capable of distinguishing between data to be transmitted between the first network (101) and the second network (102) and data to be transmitted within the first network (101) or within the second network (102). The forwarder node (109) is adapted to communicate with the first network (101) using a first operation frequency and is adapted to communicate with the second network (102) using a second operation frequency which is different from the first operation frequency.