DS-0 synchronization over a wireless ATM link
US6765917B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 3, 1999 |
| Grant date | Jul 20, 2004 |
| Priority date | — |
| Expiry date | Jun 3, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2012/5674
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A system and method for the transmission of synchronization information from a wireless asynchronous transfer mode (ATM) base station across a point to point or point to multipoint wireless link, to one or more network interface units (NIUs). Each of the NIUs is capable of supporting a combination of structured or unstructured T1 and/or E1 circuit emulation services. The technique involves locking the wireless modem downstream symbol clock to an externally provided frequency reference from the base station. The reference is an N integer multiple of 8 kHz which is the lowest common denominator for both the T1 and E1 clocking rates.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.