By Lynnette Reese – The IEEE 802.3bs standard for 400Gbps is on track to be ratified and released late this year. Higher speed technologies tend to get driven to adoption as soon as they are available.
In 2004, 10Gbps was the leading edge. In 2010 40Gbps Ethernet and 100Gbps were introduced. How did we get this far, so fast?
The present group is leveraging a parallel lane structure to get to 400Gbps. For electrical interfaces the fastest speeds in the spec will be 50Gbps. When discussing optical fiber transmission, then the variation depends on the distance that one requires.
Technically, 400Gbps is not possible without switching away from non-return-to-zero modulation (also known as NRZ-type) encoding, the encoding scheme that everyone thinks of when they visualize Ethernet communication and other serial data transmission schemes.
NRZ data is encoded into a binary pattern with fixed voltage levels. A binary 0 is represented by the lower voltage level; the higher voltage level indicates binary 1. In 1000base-T Ethernet, the stream of 0s and 1s is driven at a 1000 bits per second (1Gbps) transmission rate.
At present, the physical “wall” of streaming 0s and 1s for single lane electrical interfaces is 25 Gbps, found in the standards as 802.3bj across backplanes and cables, and 802.3bm across chip-to-chip and chip-to-module interfaces.
In May 2016, an IEEE 802.3 task force formed to develop a single-lane 50 Gbps Ethernet standard. The 802.3bs standard, which defines 400Gbps in aggregate, will use an encoding scheme called PAM4 (4-Level Pulse Amplitude Modulation) to reach 50Gbps per channel. PAM4 is an encoding scheme that doubles the bit rate by providing four signal levels in the space of the two that NRZ presently provides. PAM4 cleverly divides the least significant bit (LSB) signal level in half and adds it to the signal of the most significant bit (MSB). more> https://goo.gl/fcDF8f
Posted in Broadband, Communication industry, Economy, Education, Net, Product, Science, Technology
Tagged Broadband, Encding, Ethernet, Internet, Signal, Technology, Test & measurement
New Projects Create a Foundation for Next-Gen Flexible Electronics
By Josh Brown – Four projects set to move forward at the Georgia Institute of Technology aim to lay the groundwork for manufacturing next-generation flexible electronics, which have the potential to make an impact on industries ranging from health care to defense.
Researchers at Georgia Tech are partnering with Boeing, Hewlett Packard Enterprises, General Electric, and DuPont as well other research institutions such as Binghamton University and Stanford University on the projects.
Flexible electronics are circuits and systems that can be bent, folded, stretched or conformed without losing their functionality. The systems are often created using machines that can print components such as logic, memory, sensors, batteries, antennas, and various passives using conductive ink on flexible surfaces. Combined with low-cost manufacturing processes, flexible hybrid electronics unlock new product possibilities for a wide range of electronics used in the health care, consumer products, automotive, aerospace, energy and defense sectors.
“Flexible electronics will make possible new products that will help us address problems associated with food supply, clean water, clean energy, health, infrastructure, and safety and security,” said Suresh Sitaraman, a professor in the George W. Woodruff School of Mechanical Engineering, who is leading Georgia Tech’s flexible electronics activities. more> https://goo.gl/qjx3UT
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Posted in Broadband, Business, Communication industry, Economic development, Economy, Education, Energy & emissions, Healthcare, Nature, Product, Science, Technology, Transportation
Tagged Broadband, Business improvement, Climate change, Ecology, Georgia Tech, Health, Internet, Manufacturing, Technology
By Teri Takai – The big problem for many government agencies is that most of them still rely on declarative legacy roles, rubber-stamping certifications and manual processes to manage identities and roles — all of which expose them to continual and multiple access risks. External threat actors compromise identities to evade detection from existing defenses, while insiders work under the radar to access data for exfiltration.
To provide a robust defense and protect the identity-based perimeter, government agencies must consider new thinking and approaches.
The core issue is security leaders are not attacking the evolving security landscape through proactive planning and change management. Instead, they are stuck in a reactive mode.
It is not hard to understand why: the user profile is 24-7, global, instantaneous, and rich in consumer-driven IT. more> https://goo.gl/X59JUA
Posted in Broadband, Communication industry, Economy, Education, Leadership, Media, Net, Regulations, Technology
Tagged Broadband, Business improvement, Congress Watch, Cybersecurity, Government, Identity, Internet, Leadership, United States