DSL post-synchronization auto baud
US6535551B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 31, 2000 |
| Grant date | Mar 18, 2003 |
| Priority date | — |
| Expiry date | Jul 31, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L1/0002
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A DSL communication system including a DSL transmission unit at a central office (DTU-C) and a DSL transmission unit at a remote location (DTU-R) in communication over a communication link. DTU-C and DTU-R synchronize or train at a first data rate. After synchronization, DTU-C and/or DTU-R measure the line quality at the first data rate. The line quality may be measured based on bit-error-rate, attenuation level and/or signal-to-noise ratio. A second data rate is then selected based on the line quality measurements. DTU-C may then initiate a rate change request, according to which DTU-C and DTU-R may re-synchronize at the second rate. The second rate may be several data rates higher or lower than the first data rate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.