|[December 11, 2012]
Fujitsu, NTT and NEC Launch Joint R&D for World's Top-Level, 400Gbps-class Optical Transmissions Technology
TOKYO --(Business Wire)--
Fujitsu Limited (Fujitsu), Nippon Telegraph and Telephone Corporation
(NTT) and NEC (News - Alert) Corporation (NEC) today announced the commencement of
joint research and development toward making the world's
top-level,400Gbps/channel-class digital coherent optical transmissions
technology (*1). Bringing together the technological capabilities that
have enabled the commercialization of 100Gbps-class optical
transmissions methods, which are becoming more prevalent among the
world's optical networks, the companies will work to further enhance the
performance and functionality of the digital coherent optical
transmissions method, a key technology in optical transmissions. This
enables the possibility of realizing the world's top-level optical
networks that combine ultra-high speeds, low energy consumption and
flexibility, while also contributing to improvements in optical
transmissions technology and the global spread of the research results.
This R&D initiative was commissioned and is sponsored by Japan's
Ministry of Internal Affairs and Communications (MIC) as part of the
"Research and Development Project for the Ultra-high Speed and Green
Photonic Networks" program.
"In 2012 the supply and demand of 100G products began to converge,
leading to significant growth in deployments. The demand for network
connectivity will only increase. Therefore, the need for 400G solutions
that provide even greater bandwidth with the lowest possible power
consumption and flexible, adaptive modulation will be critical," noted
industry analyst Dana Cooperson, VP Network Infrastructure, Ovum, Inc.
"Fujitsu (News - Alert), NTT and NEC's collaborative efforts to meet this growing
demand illustrate what's possible when key industry players work
together. Carriers, enterprises, governments, and others would be wise
to look closely at this solution as they evolve their networks."
To accommodate the explosive growth in data communications traffic
stemming from the spread of the Internet and smartphones in recent
years, 100Gbps-class optical transmission methods are starting to become
more practical. At the same time, with the arrival of the big data era,
along with a surge in the diversity of data due to the spread of
machine-to-machine communications, customer expectations with regard to
speed and service continue to grow. Not only will data traffic in the
near future grow at a rapid pace, but networks will also experience
extremely large fluctuations in communications traffic, thereby
resulting in a need to build flexible network infrastructure that can
withstand such demand.
To address these impending challenges, core optical networks will
require even greater speeds. With existing optical transmission
technology, however, it is difficult to ensure the optical transmission
performance needed to meet this demand for higher speeds. Moreover,
existing communications equipment consumes a substantially higher amount
of power in proportion to the amount of data transmitted. To enable
high-capacity optical transmissions using relatively low power, a new
optical transmissions solution is needed.
Building a flexible network architecture requires the ability to adapt,
in real-time, to changes in data volumes and transmission distances.
Therefore, great demand exists for the construction of highly flexible
networks that can support regional differences in network architectures
with a single core technology.
To meet these challenges, the three companies are aiming to build
flexible, low-power networks in an effort to bring about a comfortable,
eco-friendly society. As such, they are commencing research and
development directed at implementing the core technologies required for
2. Joint Research and Development Program
Fujitsu, NTT (News - Alert) and NEC have pursued R&D on 100Gbps-class digital coherent
optical communications technology as part of the MIC's "Research and
Development on High Speed Optical Transport System Technologies" program
(2009) and "Research and Development on Ultra-high Speed Optical Edge
Node Technologies" program (2010-2011). The digital coherent DSP-LSI
(*2) that was commercialized in 2012 as a result of these programs
currently holds the world's top market share. Moreover, the achievements
of these development initiatives are currently being deployed by each
company as part of a global rol-out to optical networks throughout the
In order to once again leverage the three companies' technologies and
teamwork to bring about even greater capacity optical transmissions with
lower energy consumption, the companies will be working under the
support of the MIC's "Research and Development Project for the
Ultra-high Speed and Green Photonic Networks" to accelerate R&D on
element technologies aimed at making practical 400Gbps-class optical
The joint research will enable ultra-high-speed 400Gbps-class optical
transmissions through the use of dual-polarization quadrature phase
shift keying (DP-QPSK) (*3), which is currently in use for 100Gbps
transmissions, together with dual-polarization 16 quadrature amplitude
modulation (DP-16QAM) (*4), which takes advantage of an even greater
number of quadrature carriers. By incorporating these modulation
techniques into a high-density 60-channel fiber, the technology will be
able to bring about the world's highest capacity optical networks
capable of 24Tbps/fiber-class transmissions. In addition, to cut down on
power consumption, long-haul transmission technology that can lead to
reductions in the number of devices is required.
In light of this, the companies aim to provide the world's first
compensation technology for nonlinear optical effects (*5) within an
optical fiber-the primary limiting factor standing in the way of
long-distance transmission of multiple quadrature modulated signals.
When employed together with enhanced-performance versions of existing
compensation technologies for chromatic dispersion (*6) and polarization
mode dispersion (*7), the new technology will achieve longer
transmission distances. Furthermore, the companies will pursue the
implementation of adaptive modulation/demodulation (*8) technology that
can employ a host of modulation techniques depending on the transmission
route using a single hardware device, thereby leading to the
construction of flexible network architecture.
Through the new project, the companies will enable the following kinds
of next-generation optical network capabilities by 2014:
1. Ultra-high-speed and high-capacity optical transmissions -
400Gbps/channel-class and 24Tbps/fiber
2. Compensation for chromatic dispersion, polarization mode dispersion
and nonlinear effects occurring on a fiber-optic line, all of which are
factors that lead to performance deterioration. This results in improved
optical reach (greater than 2 times that of existing technologies).
3. A substantial reduction in network power consumption (less than half
of existing technologies) as a result of the need for fewer devices.
4. The construction of flexible networks through adaptive
modulation/demodulation using a single hardware device.
3. Future Development
Going forward, the companies will work until 2014 to address the
aforementioned technological challenges throughout the term of the R&D
project. As such, they will develop technologies pertaining to
400Gbps-class transmissions and low power consumption, while striving to
quickly make available the results of these efforts. In addition, they
will collaborate with institutions inside and outside Japan in an aim to
deploy their achievements on a global scale.
Glossary and Notes
1. Digital coherent optical transmission technology
A next-generation optical transmission method that combines coherent
reception and digital signal processing. In addition to streamlining
frequency usage through modulation methods such as polarization wave
multiplexing and phase modulation, the technology enables significant
improvements in reception sensitivity.
Digital Signal Processing LSI. A signal processing method for
converting analog data to digital data.
3. Dual-polarization quadrature phase shift keying
A technique in which information is conveyed through an optical wave's
oscillation timing (phase).
4. Quadrature amplitude modulation
A technique in which information is conveyed through both an optical
wave's amplitude and phase.
5. Nonlinear optical effects
A phenomenon in which the optical fiber's refractive index changes in
response to the light's intensity.
6. Chromatic dispersion
A phenomenon in which different wavelengths are transmitted at different
speeds within an optical fiber.
7. Polarization mode dispersion
A phenomenon that causes differences in transmission delay times within
optical fibers due to polarization (direction of vibrations in the
8. Adaptive modulation/demodulation
Technology that enables the efficient operation of optical network
resources through improved line quality by switching to the optimal
modulation/demodulation method depending on the characteristics of the
Fujitsu is the leading Japanese information and communication technology
(ICT) company offering a full range of technology products, solutions
and services. Over 170,000 Fujitsu people support customers in more than
100 countries. We use our experience and the power of ICT to shape the
future of society with our customers. Fujitsu Limited (TSE:6702)
reported consolidated revenues of 4.5 trillion yen (US$54 billion) for
the fiscal year ended March 31, 2012. For more information, please see http://www.fujitsu.com.
NTT Group is the largest provider of wireline and wireless voice, data,
leased circuit, telecommunications equipment, and system integration
services in Japan, and operates one of the largest telephone networks in
the world. Its predominant business is to provide nation-wide
NTT Group's business domain consists of five primary lines of business:
regional communications business, long distance and international
communications business, mobile communications business, data
communications business, and other business.
NTT Group reported consolidated revenues of 10.5 trillion yen
(US$130billion) for the fiscal year ended March 31, 2012. Over 220,000
NTT Group people support customers in more than 100 countries. For more
information, please see http://www.ntt.co.jp/ir.index_e.html.
NEC Corporation is a leader in the integration of IT and network
technologies that benefit businesses and people around the world. By
providing a combination of products and solutions that cross utilize the
company's experience and global resources, NEC's advanced technologies
meet the complex and ever-changing needs of its customers. NEC brings
more than 100 years of expertise in technological innovation to empower
people, businesses and society. For more information, visit NEC at http://www.nec.com.
All company or product names mentioned herein are trademarks or
registered trademarks of their respective owners. Information provided
in this press release is accurate at time of publication and is subject
to change without advance notice.
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