40G passive optical networks take shape
July 18, 2012 // Rick Merritt
The Full Service Access Network, an alliance of about 85 telecom providers and their vendors, picked a technical proposal for 40 Gbit/second passive optical networks. The group is hammering out details of its recommendations in hopes they can be ratified as standards next year and emerge in shipping systems in 2015
The FSAN group culled more than a dozen proposals down to one supported by several companies including Alcatel-Lucent, Huawei and ZTE that calls for use of time and wavelength division multiplexed (TWDM) technology. The proposal includes optional support for a wavelength division multiplexed overlay backed by Nokia Siemens Networks among others.
The group will submit its recommendations to the International Telecommunications Union for inclusion in the so-called NG-PON2 standard. It is the follow on to today’s XGPON technology that delivers 10 Gbits/s downstream and 2.5 Gbits/s upstream.
The proposal calls for supporting a stack of at least four wavelengths each carrying 10 Gbits/s of data. Engineers have discussed versions of the technology using as many as eight wavelengths to deliver 80 Gbits/s to end users and a quarter of that capacity upstream to the carrier network.
“The easiest thing about TWDM is it’s a known, proven technology and at least some components are already available for aspects of the system,” said Martin Carroll, chairman of FSAN and a distinguished member of technical staff at Verizon. “Operators unanimously agreed that was the technology we wanted to focus on,” he said.
Engineers must now fit which wavelengths the new technology will use into existing optical spectrum bands operators have dedicated to PONs, RF video and other applications, said Carroll. The proposal is expected to support distances of 40 kilometers without field amplifiers.
“That’s a huge challenge with the technology today,” he said.
The FSAN group is one of a handful working on bolstering next-generation optical networking speeds.
An IEEE group is meeting this week to discuss the future of Ethernet. One working group is debating multiple proposals for lowering the costs of today’s 100 Gbits/s Ethernet to accelerate deployments of the technology. Another is continuing work to assess the next big leap which has included a debate between advocates of 400 Gbits/s and those favoring a terabit/s.
Meanwhile, the Optical Internetworking Group met last week, hammering out a handful of proposals for 100 and 400 Gbit/s interfaces. The group also hosted a workshop on software-defined networking.
Mobile display revenues soar, leaving TV behind
April 17, 2014
Increasing demand for mobile displays, and greater demand for higher resolution and lower power consumption lead to a shift ...
European organic PV project aims for material gains
Nanomaterial-packed cathode extends range of EV lithium-sulfur batteries
Wearable computing market on 78% CAGR through 2018
OLED TV shipment delays stall OLED material growth
BMW updates navigation via mobile radio connection
April 17, 2014
Carmaker BMW has announced online updates for road maps stored in the automotive navigation system. The move could be a step ...
Ford pickups unveil first LED forward lighting solution
BMW has most advanced connectivity, study says
Google locks future wearable IP with smart lens patents
- USB 5V 2.5A Output, 42V Input Synchronous Buck with Cable Drop Compensation
- Measurement applications across multiple test platforms
- Supplying DC input power to string inverters
- Supplying DC input power for HEV testing
InterviewHeartbleed challenges the Internet of Thing
The Heartbleed security bug is a key example of the fundamental security challenge for the Internet of Things says Green Hills Software as it launches a new security group.
Filter WizardCheck out the Filter Wizard Series of articles by Filter Guru Kendall Castor-Perry which provide invaluable practical Analog Design guidelines.
Linear video channel
READER OFFERRead more
This month, Arrow Electronics is giving away ten XMC1200 lighting application kits, worth 100 Euros each, for EETimes Europe's readers to win.
Each kit combines Infineon’s brightness and colour control XMC1200 CPU board to drive flicker free LED dimming and colour changing, together with a colour LED card and a white LED card.
December 15, 2011 | Texas instruments | 222901974
Unique Ser/Des technology supports encrypted video and audio content with full duplex bi-directional control channel over a single wire interface.