Method and Arrangement in a Telecommunication System for Handling Status Information of Data Units

A method in a sending node for handling status information of data units transmitted from the sending node to a receiving node over a radio link, the method comprising:

• transmitting a stream of data units over the radio link to the receiving node, the receiving node correctly receiving some of the data units but missing a number of data units, each data unit having a respective sequence number;
• receiving a status message from the receiving node over the radio link;
• and
• interpreting the status message as a reduced status message comprising negative acknowledgments for a first part of the missing data units, and omitted negative acknowledgments for the rest of the missing data units.

A sending node for handling status information of data units transmitted from the sending node to the receiving node over a radio link, the sending node comprising:

• a sending circuit configured to transmit a stream of data units over the radio link to the receiving node, the receiving node correctly receiving some of the data units but missing a number of the data units, each data unit having a respective sequence number;
• a receiving circuit configured to receive a status message from the receiving node over the radio link;
• and
• a processor configured to interpret the status message as a reduced status message comprising negative acknowledgments for a first part of the missing data units, and omitted negative acknowledgments for the rest of the missing data units.