High availability clock synchronization and distribution for mobile backhaul networks
US7991016B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 6, 2009 |
| Grant date | Aug 2, 2011 |
| Priority date | — |
| Expiry date | Feb 28, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W24/04
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Fully redundant clock systems are provided on network nodes coupled by redundant multisegment psuedowires (MSPWs) within an internet-protocol (IP)-based mobile backhaul network. The primary clock system includes a primary master clock on a first node and a primary slave clock on a second node coupled via a primary MSPW, while the secondary clock system includes a secondary master clock on the first node and a secondary slave clock on the second node coupled via a secondary MSPW. The primary and secondary slave clocks synchronize with their respective primary and secondary master clocks via their respective MSPWs. A clock controller maintains the secondary clock system in a hot-stand-by mode, and upon determining that a switch-over is needed, automatically switches from the primary clock system to the secondary clock system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.