Trasmition of 40GBase-T and 100Gbase-T over category 7A copper cables
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Transcript of Trasmition of 40GBase-T and 100Gbase-T over category 7A copper cables
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Trasmition of 40GBase-T and 100Gbase-T over category 7A
copper cablesSteven Fratello
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Need
• Copper wires are only useful for short distance transmitions
• Alien talk often disrupts the signal on a copper cable
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Need
www.cisco.com/en/US/products/hw/optical/ps201...Increase in network traffic 1996-2001
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Need
• The copper cable determines the distance before the signal becomes to weak and distorted to be recoverable
• This distance determines the amount of repeaters used along the wire
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Knowledge baseCAT 7(ISO Class F)600 MHz1.2 GHz in pairs with Siemon connector Full-motion videoTeleradiologyGovernment and manufacturing environmentsFully Shielded (S/FTP) system using non-RJ45 connectors but backwards compatible with hybrid cords.Until February 2008, the only standard (published in 2002) to support 10GBASE-T for a full 100m.
www.nexans.us/eservice/US-en_US/navigatepub_1...
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Enteshari/Kavhrad 09
Tranmition at 40Gbase-T is practical at lengths up to 50 meters
Transmition at 100GBase-T can be practical at lengths up to 10 meters
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Kavehrad 07
• it is possible to extend the length of category 7 copper cables from 70 meters to 100 meters (Kavehrad 07)
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I. Kalet and S. Shamai• Present copper wire systems operate far
below theoretical capacity
http://www.pmi.it/file/contenuti/003853/img_01.jpg
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Viterbri decoder • “1. Branch metric calculation • 2. Path metric calculation
• 3. Traceback
• Encoded stream > branch metric calculation> path metric calculation> Traceback> decoded stream
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Measuring signal strength
• RSSI system (received signal strength indicator)
• The value is based on the max value of that system
http://cnx.org/content/m21600/latest/rssi_vs_dist.jpg
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Purpose
• To Determine the distances which 100Gbase- T is more practical than 40Gbase-T.
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Hypothesis
Alternate hypothesis- The 100Gbase over the copper cable will be more practical than the cable transporting 40Gbase in short distances
Null Hypothesis- The 40Gbase transmition over the copper cable is always more practical
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Do Ability
• Very doable • Most info can be recorded on a computer • Only the copper cables are needed • Only problem is the application of the RSSI
system
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Protocols
• Data is sent from one computer to another • Computer receiving the data would record
how much Giga bites is received. • The strength of the signal will be recorded
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Budget
• Vendor Object Price • Nexans Category 7A copper $19.55• cable 200 meters • Science res computer
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Methodology Category 7A cables
40GBase-T run through Copper cable
run through copper cable
N=10 50M N=10 100M
Internet signal sent over cable
Signal strength recorded on receiving computer
Data run through Viterbri decoder
Data statistically analyzed on spss
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Bibliography • http://www.ieee802.org/3/10GBT/public/nov03/kavehrad_1_1103.pdfpgs 1-34.
2003• Researchers Push transmission Rate of copper Cables• Ultrafast Home Network Possible by Using Separate Optical Fibers • I. Kalet and S. Shamai, “On the capacity of a Twisted-Wire
Pair: Gaussian• Model”, IEEE Transactions on Communications, vol. 38, No 3,
March 1990.• http://www.ieee802.org/3/hssg/public/nov07/kavehrad_01_1107.pdf 1-21 2007• http://www.nexans.us/US/2009/DC09_paper.pdf 1-16 Ali Entashari,
Mohsenkaverad • K. Seki, et. al., Performance Evaluation of Low-Latency LDPC Code, IEEE 802.3• 10GBASE-T Study Group Interim Meeting, July 2004.