The starting sequence number of the successfully received data packet, such as PDCP SN, NR-U sequence number. In an embodiment, the starting sequence number is the lowest sequence number of the data packet among a group of successfully received data packets with consecutive sequence numbers. In another embodiment, the starting sequence number is the sequence number of the first successfully received data packet among a group of data packets.
            the termination sequence number of the successfully received data packet, such as PDCP SN, NR-U sequence number. In an embodiment, the termination sequence number is the largest sequence number of the data packet among a group of successfully received data packets with consecutive sequence numbers. In another embodiment, the termination sequence number is the sequence number of the last successfully received data packet among a group of data packets.
            the bitmap information indicating whether the data packet is successfully received. Each bit in the bitmap indicates whether the corresponding data packet is successfully received, for example, “1” represents successful reception, “0” represents unsuccessful reception, or “1” represents unsuccessful reception, “0” represents successful reception.
        
        
    
    
In an embodiment, the successfully received data packet may include multiple groups of data packets with consecutive sequence numbers. For each group of data packets with consecutive sequence numbers, at least one of the above information (for example, the starting sequence number of the successfully received data packet, the termination sequence number of the successfully received data packet, and the bitmap information indicating whether the data packet is successfully received) may be given separately.