FIELD: radio engineering, communication.
SUBSTANCE: transmitting unit is configured to transmit data units to a receiving unit. Each data unit contains a unit sequence number and transmitted data units are stored in a transmission buffer. The transmission buffer window is configured to control flow of retransmission of said transmitted data units. When the unit sequence number is acknowledged in the field of positive/negative piggyback acknowledgement, only one is established as acknowledged at the reception of a positive/negative acknowledgement packet uplink message or a positive/negative acknowledgement packet downlink message, containing acknowledgement for said unit sequence number.
EFFECT: reduced transmission loss risk between a transmitting unit and a receiving unit in a communication network system.
16 cl, 3 dwg
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