Method and entity for packet loss distinction
AssigneeMatsushita Electric Industrial Co., Ltd.
InventorsJose Luis Rey, Carsten Burmeister, Rolf Hakenberg
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Abstract
The present invention provides a method and apparatus for distinguishing between congestion and corruption losses during the transmission of data packets. The packet lost distinction is based on the evaluation of an error detection/correction code of each data packet and by detecting sequence numbers.
Claims18
A method for distinguishing losses of data packets sent from a transmission source, the sent data packets comprise an error detection code and a sequence number inserted at the transmission source, the method comprises the steps of:
- detecting data corruption of a received data packet based on the error detection code of the received data packet,
- extracting the sequence number of a received data packet,
- detecting missing sequence numbers based on a sequence of extracted sequence numbers,
- indicating a data packet loss due to data corruption if a corrupted data packet has been detected, and
- indicating a data packet loss due to congestion if a missing data packet has been detected and if data corruption has not been detected for that data packet.
A data packet loss distinction entity for distinguishing losses of data packets sent from a transmission source, the data packets sent include an error detection code and a sequence number inserted at the transmission source, comprising:
- a bit error check unit for detecting data corruption of a received data packet based on the error detection code of the received data packet,
- a packet loss detection unit for extracting a sequence number from the received data packet and for detecting missing sequence numbers in the sequence of extracted sequence numbers, and
- a loss distinction unit for indicating a data packet loss due to data corruption based on the detection result of the bit error check unit and for indicating a data packet loss due to congestion based on the detection results of the packet loss detection unit and the bit error check unit.
Dependencies are inferred from the claim text.