Apparatus are provided, which include a wireless transmit interface and a wireless receive interface. A payload receive processor is provided to identify a receive overhead portion from received data received via the receive interface, and it is configured to retrieve payload data in relation to the receive overhead portion in accordance with a data structure protocol. A payload transmit processor is provided to define or modify a transmit overhead portion in transmit data to be transmitted via the transmit interface. The payload transmit processor is configured to position payload data in relation to the transmit overhead portion in accordance with a data structure protocol. A controller is provided, to determine a given wireless media location defined at least in part by the controller determining a given frequency band, from among plural frequency bands, for a given data transfer, via wireless media, between a given node and a separate node.