Invention Grant
- Patent Title: Protection switching in WDM rings using a shared ring switch
- Patent Title (中): 使用共享环路交换机进行WDM环路保护倒换
-
Application No.: US10448559Application Date: 2003-05-30
-
Publication No.: US08417112B2Publication Date: 2013-04-09
- Inventor: Dat D. Ngo
- Applicant: Dat D. Ngo
- Applicant Address: FR Paris
- Assignee: Alcatel Lucent
- Current Assignee: Alcatel Lucent
- Current Assignee Address: FR Paris
- Agency: Wall & Tong, LLP
- Main IPC: G02F1/00
- IPC: G02F1/00 ; G02F2/00 ; H04B10/00
Abstract:
A switching method is provided having improved accuracy in monitoring a network to determine when to switch. The method collects and stores a plurality of bit error rate (BER) values. The BER values are analyzed using a BER hysterisis algorithm to check BER degradation. Thereafter, the method switches a transmission port when the degradation exceeds a predetermined BER threshold level for a predetermined period of time. In another embodiment, a feature which transmits a switch polling signal for a predetermined duration is used with the above switching method.
Public/Granted literature
- US20040243888A1 Protection switching in WDM rings using a shared ring switch Public/Granted day:2004-12-02
Information query
