Apparatus and method for detecting and correcting pair swap, and implementing a link integrity function in a packet-based data communications system
US5768301A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 20, 1997 |
| Grant date | Jun 16, 1998 |
| Priority date | — |
| Expiry date | May 20, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L43/0823
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
The present invention allows for the detection and correction of certain error conditions in packet-based data communications systems, including systems utilizing multiple channels or signal pairs, where all channels or signal pairs do not carry a link integrity signal or other repetitive non-data signal. A first aspect of the present invention provides detection and correction for reverse polarity. A second aspect of the present invention provides detection and correction for pair swap. A third aspect of the present invention provides a link integrity function. Detection of reverse polarity, detection of pair swap, and detection of link integrity utilizes the non-data components of received packets, either independently or in conjunction with a link integrity signal or other repetitive non-data signal. Reverse polarity is corrected by inverting the received signals prior to transmission or repetition to subsequent circuitry. Pair swap is corrected by switching the signals received on the swapped pairs prior to transmission or repetition to subsequent circuitry. Link integrity status is indicated via a transmitted signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.