Method and arrangement in a wireless communication network

An apparatus for requesting a status report from a node of a wireless communication network, the status report comprising at least one of positive and negative acknowledgement of data to be received by the node, the apparatus comprising:

• a transmitter, adapted to transmit a sequence of data units or data unit segments to be received by the node;
• electronic circuitry adapted to:
• decrease a first counter based on a number of data units transmitted;
• decrease a second counter based on a number of bytes of data transmitted;
• determine whether a count of the first counter is less than or equal to a first threshold;
• and
• determine whether a count of the second counter is less than or equal to a second threshold;
• compare a count of the first counter to the first threshold;
• compare a count of the second counter to the second threshold;
• request the status report from the node if either the count of the first counter is less than or equal to the first threshold or the count of the second counter is less than or equal to the second threshold;
• reset the first counter to a first predefined value if either the count of the first counter is less than or equal to the first threshold or the count of the second counter is less than or equal to the second threshold, and
• reset the second counter to a second predefined value if either the count of the first counter is less than or equal to the first threshold or the count of the second counter is less than or equal to the second threshold.