Patent ID: 8687548

Claim:
A method in a receiving node for handling status information of data units transmitted from a sending node to the receiving node over a radio link, the method comprising: establishing that a number of data units transmitted by the sending node are missing; sending a reduced status message to the sending node over the radio link, the message including negative acknowledgements for a first part of said missing data units, omitting negative acknowledgements for the rest of said missing data units, and including a positive acknowledgement for data units up to but not including the first missing data unit for which a negative acknowledgement was omitted, to thereby prevent the sending node from erroneously interpreting those missing data units for which negative acknowledgements were omitted as having been correctly received; wherein including said positive acknowledgement comprises setting an ACK_SN field of the reduced status message to the first missing data unit for which a negative acknowledgement was omitted, the ACK_SN field thereby acknowledging data units with sequence numbers up to but not including that first missing data unit.