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Physical Layer Monitoring Methods in PON

Physical Layer Monitoring Methods in PON. XIAO Tianlei 2011.4.6. Outline. Challenges Solutions for TDM-PON Solutions for WDM-PON Others. Challenges. Common use of OTDR High resolution and short dead zones High Dynamic Range Short measurement time Difficulties in interpretation.

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Physical Layer Monitoring Methods in PON

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  1. Physical Layer Monitoring Methods in PON XIAO Tianlei 2011.4.6

  2. Outline • Challenges • Solutions for TDM-PON • Solutions for WDM-PON • Others

  3. Challenges • Common use of OTDR • High resolution and short dead zones • High Dynamic Range • Short measurement time • Difficulties in interpretation

  4. Outline • Challenges • Solutions for TDM-PON • Solutions for WDM-PON • Others

  5. Solutions for TDM-PON • P2P • Active by-pass

  6. Solutions for TDM-PON • P2P • Passive by-pass

  7. Solutions for TDM-PON • P2MP • Normally 1625nm is implemented • Reference trace • Reflector at the end of ONT

  8. Solutions for TDM-PON • P2MP • Tunable OTDR and wavelength selective reflector

  9. Solutions for TDM-PON • P2MP • Use of B-OTDR

  10. Outline • Challenges • Solutions for TDM-PON • Solutions for WDM-PON • Others

  11. Solutions for WDM-PON • Tunable OTDR and optical reflectors • Similar structure to that of TDM-PON • Existing presence of wavelength mux/demux devices

  12. Solutions for WDM-PON • Re-use of downstream signal

  13. Outline • Challenges • Solutions for TDM-PON • Solutions for WDM-PON • Others

  14. Others • OFDR • (Optical Frequency Domain Reflectometer)

  15. My thoughts Display on the Map Alarm Analyze Configuration Query System with GIS Network Managing System Monitoring Network

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