Low-cost port synchronization method in multiport Ethernet devices
US9008128B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 8, 2013 |
| Grant date | Apr 14, 2015 |
| Priority date | — |
| Expiry date | Nov 12, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04J3/0673
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A method for frequency synchronization of a multiport device may include recovering a clock frequency of a master port of a first device that is linked to the multiport device at a slave port of the multiport device. A clock frequency of the slave port may be locked to the recovered-clock frequency of the master port of the first device. Frequency data may be stored in a first frequency register associated with the slave port. The stored frequency data may include a difference between the recovered-clock frequency of the master port of the first device and a local-clock frequency of the multiport device. A clock frequency of one or more master ports of the multiport device may be synchronized with the locked clock frequency of the slave port by coupling the first frequency register to frequency registers associated with one or more master ports.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.