Ciena Pushes 100-Gig
The demo took place at the SC08 supercomputing show just recently. For those of us who weren't there, Ciena announced the news today. (See Ciena Shows Off 100G.)
The single-wavelength claim sets Ciena apart from some recent efforts, as companies like Infinera Corp. (Nasdaq: INFN) and Nortel Networks Ltd. have focused on using multiple wavelengths to carry 100 Gbit/s of data in total. (See 100-Gig Demo and Verizon Adds Nortel to Its 100G Club.)
Moreover, Ciena says it put its transponder into a slot of its CN 4200 RS platform. This, the company claims, sets it apart from single-wavelength demos by Alcatel-Lucent (NYSE: ALU) and Nokia Networks . (See OFC: Hero Experiments and Verizon Talks GMPLS, 100-Gig.)
In a way, Ciena's demo was the opposite of what Infinera showed at NXTcomm. Infinera took a 100-Gbit/s data stream off an Ixia traffic generator and delivered it across 10 wavelengths carrying 10 Gbit/s apiece.
Ciena used ten 10-Gbit/s Ethernet client feeds and asynchronously multiplexed their traffic together onto one 100-Gbit/s wavelength. Ciena also applied some home-baked forward error correction (FEC), implemented in a field programmable gate array (FPGA) to help the 100-Gbit/s signal travel along fiber suitable for 10-Gbit/s traffic.
The 100-Gbit/s signal was delivered in a wrapper meant to resemble what the eventual OTN standard could look like. "We took an interpretation of how that's evolving and used FPGAs to develop an OTN-like frame," says Dimple Amin, vice president of special projects at Ciena.
Ciena's choice of modulation was dual-polarization differential quadrature phase shift keying (DP-DQPSK, duh).
Unlike some other tests, Ciena didn't use a live network to carry the signals, instead opting to bring its own 80 kilometer coil of fiber. With help from the California Institute of Technology (Caltech) , Ciena kept the demo going for 12 hours.
This wasn't the only 100-Gbit/s talk going on at the show. Representatives of ESnet and Internet2 used the show to talk up the need for practical 100-Gbit/s transmission by 2010, recruiting Infinera, Juniper Networks Inc. (NYSE: JNPR), and Level 3 Communications Inc. (NYSE: LVLT) to the cause. (See Internet2, ESnet Want Their 100-Gig.)
— Dimple Matsumoto, West Coast Editor, Light Reading