Protection Mechanism in PON Zhicheng Zhang 2010.12.14. Outline. Background Protection network architectures in the ITU-T r ecommendation Some novel protection architectures Architectures in tree-type WDM/TDM PON Architectures in ring-type WDM/TDM PON Conclusion and thinking. Background.
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Protection network architectures in the ITU-T recommendation
Some novel protection architectures
Architectures in tree-type WDM/TDM PON
Architectures in ring-type WDM/TDM PON
Conclusion and thinking
This approach offers an economical yet limited protection
Only the feeder fiber is protected
Cost and power budget is high
Costly and high restore time
Novel 1:1 dedicated link protection architecture
Two geographically disjoint fibers exist to protect against FF cuts.
Every two adjacent ONUs form a pair to realize dedicated protection.
More cost efficient
Four wavelengths in each wavebands
A,C are for upstream and B and D are for downstream
Recovery within 90ms
ACS: Access Control System
CPD: automatic switching that will be controlled by ACS
Activate section in ACS: responsible for sending generation of activation of signal
Purple: a breakdown at working line
Yellow: breakdown at working line and protection line
Blue: breakdown at both working line and protection and also breakdown at working line neighbor
This method takes about 10.5 ms for the protection in the real situation.
1. Less 1 ms recovery time
2. Require some amplifiers
because the link loss is over 30 dB
At OLT, the optical splitter combines the upstream traffic(US) and divides the optical power of downstream traffic(DS) to both lines.
When double failure happens, the capacity of the network use both line 1 and 2 at the same time provides survivability to the network.
A Novel Protection Mechanism in TDM PON, M.M. Carvalho and E.A. De Souza, ICTON 2009
 Seamless maintenance and protection scheme for next generation access network, Jong Hoon Lee,
 A simple passive protection structure in a ring type hybrid WDM TDM PON, Dong-Min Seol, ICACT 2009
 Pon protection in a long-reach WDM/TDM PON, Dong-Min Seol, COIN 2009
 protection scheme of fiber to the home passive optical network using access control system, Aswir Premadi, Kasmiran Jumari,
 Next-Generation FTTH PON, Josep Segarra, 2008
 Protection Access Network: an Architecture Approach to Remote Monitor and Control, Aswir Premadi, Kasmiran Jumari, ICCTD 2009