Wireless communication device, network node and methods for handling data transmissions

A wireless communication device, comprising:

• a processor;
• memory comprising instructions executable by the processor whereby the wireless communications device is configured to:
• transmit data over an asynchronous protocol on an uplink carrier to a single radio node of a wireless communication network;
• monitor a Physical Downlink Control Channel (PDCCH) for Hybrid Automatic Repeat Request (HARQ) information conveyed by a New Data Indicator (NDI) flag of a transmission from the single radio node, the NDI flag supporting two states, wherein a first of the two states indicates, by the NDI flag not being toggled, that the transmission comprises an uplink grant for retransmission of the data, and a second of the two states indicates, by the NDI flag being toggled, that the transmission comprises an uplink grant for new data;
• receive the transmission on the PDCCH in response to the monitoring;
• and
• transmit the new data or retransmit the data based on whether or not the NDI flag is toggled, respectively, wherein the transmitting or retransmitting is to the single radio node.