Method and a device for improved status reports

A first transceiver of a cellular communications system, the first transceiver being configured to

• send data units to and receive data units from a second transceiver, in the system, wherein each of said data units is given an identifier in the form a sequence number, and wherein said data units are divided into segments,
• send status information in data units about partially received or non-received data units to said second transceiver, and in the case of one or more non-received or partially received data units,
• send the status information as a message comprising at least:
• a field, comprising a first extension indicator bit,
• a field, comprising data regarding a non-received or partially received data unit in the form of a sequence number for the non-received or partially received data unit, and
• in the case of one or more partially received data units, information which parts of those data units were not received,
• wherein said first extension indicator bit indicates the absence or presence of a set of fields, the set of fields comprising
• a field, comprising another of said first extension indicator bit,
• a field, comprising a second extension indicator bit indicating an absence or presence of information indicating which parts of a partially received data unit were not received, and
• a field, comprising data regarding a partially or non-received data unit in the form of a sequence number for the non-received or partially received data unit.

A method for use in a cellular communications system, the method comprising:

• sending data units from a second transceiver to a first transceiver, each of which data unit is given an identifier in the form of a sequence number, and which data units are divided into segments,
• receiving the data units by the first transceiver from the second transceiver,
• sending by the first transceiver status information to the second transceiver in data units about partially received or non-received data units, wherein in the of one or more non-received or partially received data unit or units, the status information is sent as a message comprising at least:
• a field, comprising a first extension bit,
• a field, comprising data regarding a non-received or partially received data unit in the form of a sequence number for the non-received or partially received data unit, and
• in the case of one or more partially received data units, information which parts of those data units were not received,
• wherein said first extension indicator bit indicates the absence or presence of a set of fields, the set of fields comprising
• a field, comprising another of said first extension indicator bit,
• a field, comprising a second extension indicator bit indicating an absence or presence of information indicating which parts of a partially received data unit were not received, and
• a field, comprising data regarding a partially or non-received data unit in the form of a sequence number for the non-received or partially received data unit, and
• receiving by the second transceiver the status information from the first transceiver.

A cellular communication system, comprising a first transceiver and a second transceiver, wherein the first transceiver is configured to send status information to the second transceiver in data units about partially received or non-received data units, wherein in the case of one or more non-received or partially received data unit or units, the first transceiver is configured to send the status information as a message comprising at least:

• a field, comprising a first extension indicator bit,
• a field, comprising data regarding a non-received or partially received data unit in the form of a sequence number for the non-received or partially received data unit, and
• in the case of one or more partially received data units, information which parts those data units were not received,
• wherein said first extension indicator bit indicates the absence or presence of a set of fields, the set of fields comprising
• a field, comprising another of said first extension indicator bit,
• a field, comprising a second extension indicator bit indicating an absence or presence of information indicating which parts of a partially received data unit were not received, and
• a field, comprising data regarding a partially or non-received data unit in the form of a sequence number for the non-received or partially received data unit,
• and wherein the second transceiver is configured to send the data units to the first transceiver and is configured to receive the status information from the first transceiver.