Ethernet device that performs cable diagnosis by using IEEE 802.3 compliant waveform and associated ethernet cable diagnosis method
AssigneeAiroha Technology Corp.
InventorsChia-Hsing Hsu, Wei-Ling Li
Life of this patent
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Abstract
An Ethernet device includes a link test pulse (LTP) generator circuit, a hybrid circuit, a transmit (TX) circuit, a receive (RX) circuit, and a post-processing circuit. The LTP generator circuit generates an LTP signal that is compliant with an IEEE 802.3 standard. The TX circuit transmits the LTP signal to an Ethernet cable through the hybrid circuit. The RX circuit receives an RX signal from the hybrid circuit during a period in which the LTP signal is transmitted through the hybrid circuit. The post-processing circuit performs a cable diagnosis of the Ethernet cable according to the RX signal.
Claims18
An Ethernet device comprising:
- a link test pulse (LTP) generator circuit, arranged to generate an LTP signal that is compliant with an IEEE 802.3 standard;
- a hybrid circuit;
- a transmit (TX) circuit, arranged to transmit the LTP signal to an Ethernet cable through the hybrid circuit;
- a receive (RX) circuit, arranged to receive an RX signal from the hybrid circuit during a period in which the LTP signal is transmitted through the hybrid circuit;
- and
- a post-processing circuit, arranged to perform a cable diagnosis of the Ethernet cable according to the RX signal;
- wherein the RX signal comprises a plurality of sample values at different time instances, and the post-processing circuit is arranged to accumulate the sample values to generate an accumulation result, and identify a cable status of the Ethernet cable according to the accumulation result.
An Ethernet device comprising:
- a link test pulse (LTP) generator circuit, arranged to generate an LTP signal that is compliant with an IEEE 802.3 standard;
- a hybrid circuit;
- a transmit (TX) circuit, arranged to transmit the LTP signal to an Ethernet cable through the hybrid circuit;
- a receive (RX) circuit, arranged to receive an RX signal from the hybrid circuit during a period in which the LTP signal is transmitted through the hybrid circuit;
- and
- a post-processing circuit, arranged to perform a cable diagnosis of the Ethernet cable according to the RX signal;
- wherein the RX signal comprises a plurality of sample values at different time instances in a forward direction, and the post-processing circuit is arranged to identify a position of a cable problem of the Ethernet cable through sequentially checking sample values of the RX signal in a backward direction.
An Ethernet cable diagnosis method comprising:
- generating a link test pulse (LTP) signal that is compliant with an IEEE 802.3 standard;
- transmitting the LTP signal to an Ethernet cable through a hybrid circuit;
- receiving a receive (RX) signal from the hybrid circuit during a period in which the LTP signal is transmitted through the hybrid circuit;
- and
- performing a cable diagnosis of the Ethernet cable according to the RX signal;
- wherein the RX signal comprises a plurality of sample values at different time instances, and performing the cable diagnosis of the Ethernet cable according to the RX signal comprises:
- accumulating the sample values to generate an accumulation result;
- and
- identifying a cable status of the Ethernet cable according to the accumulation result.
An Ethernet cable diagnosis method comprising:
- generating a link test pulse (LTP) signal that is compliant with an IEEE 802.3 standard;
- transmitting the LTP signal to an Ethernet cable through a hybrid circuit;
- receiving a receive (RX) signal from the hybrid circuit during a period in which the LTP signal is transmitted through the hybrid circuit;
- and
- performing a cable diagnosis of the Ethernet cable according to the RX signal;
- wherein the RX signal comprises a plurality of sample values at different time instances in a forward direction, and performing the cable diagnosis of the Ethernet cable according to the RX signal comprises:
- identifying a position of a cable problem of the Ethernet cable through sequentially checking sample values of the RX signal in a backward direction.
Dependencies are inferred from the claim text.