Link fault handling in fronthaul communication networks
US11206557B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 16, 2019 |
| Grant date | Dec 21, 2021 |
| Priority date | — |
| Expiry date | Mar 11, 2040 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W84/20
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
In a fronthaul network system, when a CPRI link fault is detected at either of the REC or RE, both the REC and RE perform a Layer 1 synchronization. The fault may be a loss of signal, loss of frame, or a line code violation, which also translates to a loss of signal if seen beyond a threshold. A proxy slave recognizes the fault in a CPRI signal from a first radio device and inserts the fault alarm into a header of a radio over Ethernet frame. The proxy slave continues to communicate the signal for a configured number of hyper-frames. A proxy master receives the signal and communicates the signal and the fault alarm to a receiving radio device for a configured number of hyper-frames. The proxy and radio devices all perform a joint resynchronization.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.