Penn State

Workshop on
"Greater than 10 Gigabits per second Copper Ethernet"

August 10-12, 2009

Home Speakers Presentations Information Event Photos Program details

Abstracts:

 

Yakov Belopolsky

Manager of  Research and Development for Bel Stewart Connector Inc

 

Topic: Copper Connecting Hardware for 10 to 100 Gigabit Ethernet

 

The presentation describes international standards and classification for copper connectors and interfaces.  The paper provides detailed data on the performance of the category 7A connectors per IEC 61076-3-100.  The test results up to 5GHz with twinax and twisted pair cables are discussed. The test studies have been conducted at the facilities in the US, China, Singapore and Spain.  It has been demonstrated that the NEXT isolation at a level better than 40 dB at 5GHz can be achieved.

A design of termination boards with better than 80 dB NEXT isolation is described.

 

 

 

Wael William Diab

Technical Director, Office of the CTO - Broadcom Corporation

 

Topic: Overview of Standardization Process in IEEE 802.3 and Emerging Ethernet Technologies

 

This presentation will give an overview of the standardization process in IEEE 802.3 (Ethernet). The talk will cover the various stages including the call for interest, task force work and project balloting. Sample timelines and work of previous projects will be presented as an example. Additionally, an overview of emerging Ethernet technologies along with evolutionary trends and application areas will be covered.

 

 

 

Alan Flatman

Principal Consultant, LAN Technologies

 

Topic: The Market Opportunity for Higher Speed Ethernet over Copper

 

This is an analysis of the addressable market for 40G and 100G Ethernet over copper cabling during the period 2010 to 2020. The analysis focuses on enterprise data centers as the prime volume market for short, low-cost, server-to-switch links. Base data is taken from server shipment forecasts plus a recent survey of 250,000 data centre links conducted by the author. The analysis will explore the effect of link reach on market potential and also consider the impact of blade servers which may gravitate towards backplane connectivity, rather than cable. Transceiver cost sensitivity will also be addressed.

 

 

 

David Hess

Technical Manager for LAN - Nexans Corporation

 

Topic: LAN Cabling for 40 Gbps

 

The next step in the development of Ethernet LAN systems for 40 Gb/s is underway. New Ethernet standards development projects have commenced for 40 Gb/s and 100 Gb/s over copper based backplane and interconnect links. The next logical step for a new copper LAN PHY is 40GBASE-T. Feasibility of 40GBASE-T has already been proven by a capacity analysis study using cabling similar to the recently standardized Category 7A. Normal system performance objectives include 10-12 BER, 100 m reach, 4-pair cabling, 4-connector channel. This paper explores some of the technical challenges for LAN Cabling necessary to meet those objectives, e.g. cable performance trade-offs, bandwidth versus SNR, performance testing beyond 1000 MHz, and backwards compatibility with Category 6A.

 

 

 

Mohsen Kavehrad

CICTR Director and W.L. Weiss Professor of Electrical Engineering, The Pennsylvania State University

 

Topic: Transmission Strategies for Beyond 10 Gbps High-Speed Access over Copper Ethernet

 

This presentation focuses on potential that copper cables can offer in ever-increasing high-speed data transmission applications. We consider conceptual designs and demonstration systems for distribution of digital data streams over standard Category 7 cables beyond 10Gbps. We have demonstrated that a data rate of up to 40Gbps over 100m of CAT-7A (an enhanced version of CAT-7 with a better performance and engineering design) is feasible at a reasonable design complexity level. Current implementation technology already appears to be capable of supporting 40Gbps transmission over 50m of CAT-7A. Developing 40 and 100Gbps over 100m balanced cabling is challenging. Minimizing cost, power and latency while ensuring a robust and reliable performance over 100m and through four connections requires a significant level of innovation in communications theory, mixed-signal circuits and complex coding schemes in order to support the emerging 40G Ethernet and eventually 100G standards.

It appears the Copper Ethernet community may have to break from the legacy single-carrier M-PAM and adopt analog multi-carriers to meet the power efficiency and latency requirements.

 

 

 

Valerie Maguire and Christian Acuna
 V. Maguire, Global Sales Engineer and C. Acuna, Signal Integrity Engineer - The Siemon Company

 

Topic: A Short Reach 40Gbps Structured Cabling Solution for Data Center and Server Cluster Applications

 

As computing and storage rates explode, data centers and server clusters will benefit from Ethernet transmission speeds in excess of 10 Gbps sooner than anticipated.  Both of these applications are typically deployed over shorter length channels (i.e. less than 30 meters) containing a maximum of two connectors and in environments where an emphasis is placed on reduced latency, power consumption, and cooling requirements.  This seminar explores the potential to respond to the needs of the data center and server cluster market with a structured category 7A cabling solution operating in short reach mode (as defined by 802.3an) with reduced dependence upon DSP as compared to existing 10GBASE-T PHY technology.  Conclusions will be supported by capacity analysis, recommendations for minimum cabling performance, and a discussion of the benefits of structured cabling over an interconnect approach in the target environments.

 

 

 

Scott Powell

Senior Engineering Director - Broadcom Corporation

 

Topic: Multi-Gigabit Signaling Over Twisted Pair Cabling

 

Data communication over twisted pair copper cabling has enjoyed explosive growth since IEEE standardization of Ethernet beginning in the early 1990ís.  Installed copper Ethernet ports supporting 10/100/1000Mbps data rates number well into the billions with Gigabit Ethernet to the desktop driving increased adoption.   The 10Gbps twisted pair market is poised to grow substantially over the coming years which will drive the need for even higher bandwidth to support the ongoing convergence of networking; high performance computing and storage traffic in the enterprise and data center.  A 10GBase-T PHY is vastly more complex than a 1000Base-T PHY.  In addition to echo/crosstalk cancellation schemes, 10GBase-T introduces transmitter-based pre-coding, adaptive matrix equalization, a 2-dimensional modulation code, and iterative Low Density Parity Check based Trellis coded modulation.   To achieve reliable 10Gbps transmission over 100m UTP cabling, a 10GBase-T PHY must operate within a few decibels of the Shannon limit.   Achieving rates above 10Gbps will require improvements in connectors and cabling systems and will require more efficient modulation codes, channel codes, and more complex signal processing.  Innovations in implementations of high speed, high complexity analog and digital signal processing functions will be required for a >10Gbps PHY to be realizable and cost effective in IC fabrication technologies available in the near term.

 

 

 

George Zimmerman

CTO - Solarflare Communications Corporation

 

Topic: Beyond Capacity: Utility, Complexity and Power Considerations for Copper Ethernet beyond 10Gbps

 

Experience with 10GBASE-T has shown that the commonly held views of capacity on copper cabling are often the result of industry assumptions.  Channel parameters viewed at the current generation as limiting the capacity of a cabling channel have been removed in the next generation by advances in cabling, signaling, or signal-processing technologies.  This talk will focus on considerations to maximize the utility of a solution, e.g., its impact on the data center operations, the complexity of a solution, both from a transceiver implementation and an operational perspective, and the power consumption of solutions on a transceiver, system and data center scale.  These considerations will focus the discussion on cabling types, signaling and bandwidth utilization, as well as appropriate reach and connection topologies for copper Ethernet beyond 10Gbps.

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