Method and apparatus for using synthetic preamable signals to awaken repeater
US5898678A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 25, 1996 |
| Grant date | Apr 27, 1999 |
| Priority date | — |
| Expiry date | Sep 25, 2016 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L12/44
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
In a 100BASE-T4 protocol network, the "carrier.sub.-- status" signal associated with an incoming packet on a PMA of a given port of a Clause 27 repeater is obviated and a direct connection between PMAs and a Clause 27 repeater in the network is eliminated by transmitting synthetic preamble signals over the PMA-Repeater Data Interface to the Clause 27 repeater corresponding to the given port at an early time prior to the time that the actual preamble information of the packet is transmitted over that data interface. Receipt of the synthetic preamble signals causes the repeater to awaken and to repeat the synthetic preamble signals to other ports of the repeater. In turn, the other ports become quiet in anticipation of data to be repeated from the given port to the other ports of the repeater.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.