1. Requirements for PCE Applied in OTN Networks draft-zhang-pce-reqs-for-otn-00.txt Fei Zhang Feng Gao Yuanlin Bao ZTE Corporation

2. PCEP Requirements for OTN The optical LSP in OTN is sensitive to optical impairments especially for high peed services, e.g. 40G/100G Additional information needs to be provided in PCEP when PCE is used: FEC (forwarding Error Coding) Modulation format BER (Bit Error Ratio)

3. Scenario1: PCC specifies modulation/FEC (1)Client1 requests a 40G eth service to Client2 over OTN transport network (2)Node A (PCC) sends PCReq to PCE, specifying a Pre-FEC BER value (3) PCE returns the calculate d results to PCC, including the actual BER value Pre-FEC BER value consists of: required BER value (determined by modulation/rate) Margin for optical impairments (PMD/OSNR/NLPS) Margin for future use

4. Scenario2: PCE determines modulation/FEC (1) Client1 requests a 40G eth service to Client2 over OTN transport network (2) Node A sends PCReq to PCE (3) PCE determines signals modulation/FEC of every opaque node along the path, and the BER value of the LSP PCRep should contain these parameters Modulation format FEC BER

5. Next Steps Refine it according to the feedback from meeting or mailing list Comments are always appreciated