公开(公告)号：US20210051494A1

公开(公告)日：2021-02-18

申请号：US16543344

申请日：2019-08-16

Applicant: Cisco Technology, Inc.

Inventor： Prashant Anand ,  Manoj Kumar ,  Sudhir Kayamkulangara ,  Manigandan Boopalan ,  Dinuraj K.

IPC: H04W24/04 ,  H04L12/24

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.