Method and entity for packet loss distinction
First Claim
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1. 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.
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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.
20 Citations
18 Claims
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1. 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:
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. 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:
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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. - View Dependent Claims (16, 17, 18)
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Specification