FIELD: communication technique.
SUBSTANCE: receiving device receives a data unit from a transmitting device via a communication line. If the data unit satisfies the preset condition, the receiving device sends the data unit reception status information to the transmitting device via the said communication line. At that, the preset condition contains: an acknowledgment policy corresponding to a data unit not established for non-acknowledgment, and the sequence number (SN) of the data unit is greater than or equal to the initial sequence number (SSN) in the unit acknowledgment (BA) frame; and the data unit reception status information is carried in the BA frame.
EFFECT: reducing the phenomenon when the confirmation rule is violated in some scenarios.
12 cl, 15 dwg, 1 tbl
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