100GbE Transport Requirements Klaus Grobe, Jörg-Peter Elbers, Michael Eiselt Internet2 Meeting, October 10th, 2007

Outline 100GbE Carrier Transport IEEE HSSG and ITU-T SG15 Interface Focus and Status 100G Requirements and Challenges Possible (and likely) Solutions

Optical Transport Network 100GbE Carrier Transport Provider Edge (PE) Customer Edge (CE) Optical Transport Network 100GbE N x 100GbE “Client I/F” “Line I/F” Mapping, Framing, FEC & OAM, Multiplexing Transparent transport of 100GbE services Reach and capacity extension (Mm, Tb/s) Inline optical amplification and compensation/equalization, DWDM, advanced modulation/coding

IEEE and ITU Interface Focus Basis Focus Application Physical Media Operation Price Expectation IEEE 802.3 HSSG “Client interface” 802.3 Standard Data equipment LAN/Short Reach Copper, SMF, MMF 1 x 100G (grey) 2 x 10GbE ITU-T SG15 “Line interface” G.709 Standard Transport equipment WAN/Long Reach SMF N x 100G (amplified DWDM) 6.25 x OTU-2* *) 2.5x price for 4x capacity

100GbE Transport Requirements Support of metro and (regional/LH) core DWDM applications Compatibility to today’s fiber infrastructure Compatibility to 50GHz channel grid (core) Compatibility to 100GHz channel grid (metro) ≥ 2x increase in spectral efficiency compared to 40Gb/s (core) > 2x increase in spectral efficiency compared to 10Gb/s (metro) 100GbE must consider / be considered by OTH OTU4

100GbE Transport Challenges For same reach and modulation format as 10Gb/s 10dB OSNR penalty 100x higher impact of GVD 10x higher impact of PMD More degradations by fiber nonlinearity Incompatibility to optical filters and channel grid Serial transmission (100GbE per l) expected to win on long term Needs advanced modulation, FEC, electronic signal processing Likely different interface variants for metro and core Industry consensus on formats highly desirable Noise Limit Non-linear Limit Launched Channel Power [a.u.] Number of Spans [a.u.]

Likely 100G Interface Summary Data/client interfaces 10m 10x 10.3Gb/s Cu Assembly SDM 100m 10x 10.3Gb/s OM3 MMF 850nm SDM 100m 1x 103Gb/s SMF 1.3µm TDM 10km 4x 25.8Gb/s SMF 1.3µm xWDM 40km 4x 25.8Gb/s Transport/line interfaces @ 1.55µm Enterprise 4x 25.8Gb/s < 200km SMF DWDM Metro 1x 111Gb/s < 600km SMF Multi-level/carrier Core 1x 111Gb/s (27.8GBd) < 2000km SMF QPSK+PolMux 100G transport will start in metro and enterprise (corporate backbone) networks System upgrades 10G  40G  100G are required!

Summary Single-wavelength transport necessary for spectral efficiency ITU-T G.709-compliant framing mandatory Support upgrades of 10G/40G installations Different solutions for different distance domains Focus on highly tolerant, cost effective realizations

KGrobe@ADVAoptical.com JElbers@ADVAoptical.com MEiselt@ADVAoptical.com Thank You KGrobe@ADVAoptical.com JElbers@ADVAoptical.com MEiselt@ADVAoptical.com