A method for operating a network node in a millimeter network, mmW network is provided. Operations according to the method include receiving a data packet comprising header information, the header information indicating a source ID, a destination ID, 5 a flow ID and a UE ID; and transmitting, to the preceding network node, an ARQ response message indicating the flow ID and the UE ID and ACK/NACK pertaining to the received data packet. Related devices and methods are also provided.
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