Method and a transceiver for HARQ failure detection
AssigneeTelefonaktiebolaget LM Ericsson (publ)
InventorsHenning Wiemann, Magnus Lindstrom, Michael Meyer, Janne Peisa
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Abstract
The present invention relates to a method and to a transceiver (400) for detecting HARQ transmission failure in a telecommunications system. The transceiver (400) is arranged to execute a HARQ process which is used to generate a transmission of data units to e.g. a eNodeB. The transceiver is also arranged to determine when a maximum number of transmission attempts is reached and when this occurs to flush a HARQ buffer associated with the HARQ process and to detect that a HARQ transmission failure has occurred when the last HARQ feedback received for the current HARQ process is not a HARQ ACK.
Claims15
A method of detecting a hybrid automatic repeat request (HARQ) transmission failure in a transceiver of a telecommunications system wherein data units are exchanged between the transceiver and another transceiver, said method comprising the steps of:
- executing a HARQ process used to generate a transmission of at least one data unit to the other transceiver;
- determining when a maximum number of allowed transmissions is reached;
- flushing a HARQ buffer associated with the HARQ process when the maximum number of allowed transmissions is reached;
- receiving an ACK feedback from the other transceiver;
- and
- detecting that a HARQ transmission failure has occurred despite the ACK feedback received from the other transceiver when the last HARQ feedback received from the other transceiver for the current HARQ process differs from a HARQ acknowledgment (ACK).
A transceiver for detecting a hybrid automatic repeat request (HARQ) transmission failure in a telecommunications system wherein data units are exchanged between the transceiver and another transceiver, said transceiver is configured to:
- execute a HARQ process to generate a transmission of at least one data unit to the other transceiver;
- determine when a maximum number of allowed transmissions is reached;
- flush a HARQ buffer associated with the HARQ process when the maximum number of allowed transmissions is reached;
- receive an ACK feedback from the other transceiver;
- and
- detect that a HARQ transmission failure has occurred despite the ACK feedback received from the other receiver when the last HARQ feedback received from the other transceiver for the current HARQ process differs from a HARQ acknowledgement (ACK).
Dependencies are inferred from the claim text.