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Download Here Deploying NBASE-TTM 2.5G/5GBASE-T Technologies George A. Zimmerman, Ph.D., CME Consulting BoarD of Directors, NBASE-T Alliance Peter Jones, Cisco Systems Chairman, NBASE-T Alliance Masood Shariff, CommScope Participant, NBASE-T Alliance Dan Payerle, IDEAL Networks Participant, NBASE-T Alliance 2016 Ethernet Alliance BASE-T RoaDmap Cat 6a Cat 6 Cat 5e The Applications Spaces of BASE-T Data Rate www.ethernetalliance.org 3 NBASE-T anD 802.3bz Technology – BaseD on 10GBASE-T • PAM-16 with the same LDPC coDe for gooD performance – Minor modifications give better impulse noise performance – Upper frequency of ½ (5G) anD ¼ (2.5G) that of 10GBASE-T – Proven 10GBASE-T startup sequence for good interoperability • NBASE-T and 802.3bz expected to be interoperable with each other – Auto Negotiation enables multi-mode PHY operation – 802.3bz PHY signaling is identical to NBASE-T • Supports PoE! 2.5G on Cat 5e: 10GBASE-T technology makes it feasible • Assume: 2.5Gbps rates use <= 100Mbps of banDwiDth – Cat 5e specifies that frequency span -> Transmission at 2.5Gbps requires 6.25bits/sec/Hz • Assume: Link supports 1000BASE-T operation – 1000BASE-T requires 4 bits/sec/Hz -> Difference is 2.25bits/sec/Hz = 6.75 DB – Signaling at 200 MBauD instead of 125 MBauD loses at most 2 DB • System parameters for 1000BASE-T: – CoDing gain of 1000BASE-T was 6dB (asymptotic, actual gain is ~4.75 DB) – 1000BASE-T Design points 10.5 DB Design margin w/o FEXT (or with FEXT cancellation) • See grouper.ieee.org/groups/802/3/tutorial/march98/mick_170398.pDf (6.5 bit-equivalent ADC) • Drops to 8.2 DB with Clause 40A ANEXT limit levels • NeeD to recover up to 8.75 DB relative to 1000BASE-T Design point – ALMOST within the target margin for implementation losses. What’s a “Use Case”? • Designers of NBASE-T recognizeD many links would support rates above 1Gbps – Wireless Access Points were installed in links that were fanneD out, allowing less than worst- case alien crosstalk • Alien crosstalk impacts the speeD you can get above 1Gbps – Cat 5e anD Cat 6 are not specifieD for alien crosstalk IEEE 802.3bz or NBASE-T? • Expect to be interoperable with each other, so how Do they Differ? • NBASE-T aDDs “Downshift” to 802.3bz – Normal Auto Negotiation selects the fastest rate both PHYs support, irrespective of the cabling, noise or environment – But, in 2.5G/5GBASE-T, the speeD you get varies with the cabling configuration anD other links crosstalking – So... “Downshift” automatically shifts the rate baseD on the channel noise • Similar to Wi-Fi rate adaptation • Users always get a reliable link NBASE-T & IEEE - Timeline of Success Source: NBASE-T Alliance PSOCSR 2001 8 What you will hear: • Peter Jones will discuss a systems vendors’ perspective – Why you want to use it, what to look for • Masood Shariff will discuss the cabling perspective – TIA Developments, more on use cases anD Cat 5e vs Cat 6 vs Cat 6a performance • Dan Payerle will discuss testing issues for 2.5G/5GBASE-T performance NBASE-T™ 2.5GBASE-T/5GBASE-T Where anD Why Peter Jones Principal Engineer – Cisco Systems Chairman – NBASE-T Alliance 802.3 Ethernet anD 802.11 WLAN –Deployments ToDay 1000BASE-T Power over Ethernet Access Switch Cabling Access Point Mostly 1000BASE-T ports Cat 5e/6/6A up to 100M Connects 802.11 to 802.3 PoE PSE (15/30/60W, 4PPoE) New installs using Cat 6A for 10+yr life PoE PD (Powered Device) Footprint sensitive (e.g. power, heat, etc.) 11acWave 2 drives backhaul traffic > 1 Gb/s. No easy way to get above 1Gb/s. 11 1800 2014 Cat 5e Outlets 539 M 1600 Cat 6 Outlets 743 M 1400 Cat 6a Outlets 111 M Cat 7 Outlets 10 M Why 2.5G anD 5G BASE-T? 1200 Total 1.4 B 1000 • Between 2003 to 2014 ~70 billion meters 800 600 of Cat 5e anD Cat 6 cabling were solD…. 400 – ~90% of installed base 200 0 2003 2007 2011 2015 – Enormous network infrastructure investment Cat 5e outlets Cat 6 outlets Cat 6a outlets Cat 7 outlets Installed Base: Outlets by Cable Type Source: • Existing specifications support 1Gb/s over this cable, but faster BSRIA December 14 data rates are possible • BASE-T allows incremental upgraDe – Lets get more value from this investment! 10 meters of cabling – What can we enable? for every man, woman, anD child on Earth … NBASE-T AllianceSM - Overview • NBASE-T Alliance (www.nbaset.org/) – VenDor alliance for 2.5G/5G BASE-T with 45+ participant companies. • Who is in the Alliance? – Components, silicon, systems, cabling, test, etc. • Alliance role? – Enable wiDespreaD Deployment, evolve specifications, facilitate interoperability. Alliance Strength - Full Ecosystem Potential Applications ENTERPRISE INDUSTRIAL InDoor/OutDoor Access Points InDustrial/OutDoor Access Points Workstations, Desktops, Notebooks Workstations Enterprise NAS Machine Vision Cameras Professional AuDio ViDeo Systems anD ViDeo Content EDiting Compact Switches MeDical Imaging Systems HOME SERVICE PROVIDERS Access Points & Routers DOCSIS Home Gateways Desktops, Notebooks PON ONT Gateways NAS Small Cells Gaming Computers Small Cells NBASE-T Alliance at Interop 2016 Las Vegas 802.11ac anD 2.5G/5G BASE-T forecasts Enterprise 802.11ac AP Transition Source: Dell’Oro Group Wireless LAN 5-year Forecast Jan 2016 There is a rapid transition from 11n to 11ac Wave 2 starts ramping in 2016 100M/1000M to 2.5G/5G transition Source: Dell’Oro Group Ethernet Switch 5-year Forecast Jan 2016 Wave 1 APs Wave 2 5.0 Gbps 2.5 Gbps Ports 1000 Mbps 2013 2020 100 Mbps 2.5G / 5G BASE-T Ethernet is expected to be rapidly adopted 2014 2020 PSOCSR 2001 16 Structured cabling considerations for supporting NBASE-T and IEEE Std. 802.3bz for 2.5G/5GBASET Masood Shariff - Outline • What are the cabling committee guidelines for Category 5e and Category 6 to support 2.5G/5GBASET? • Are Category 5e and Category 6 specifications changing? • What additional qualifications are needed to characterize Category 5e and Category 6 to support 2.5G/5GBASET? • Are test procedures available to evaluate the installed base? • What are the chances that existing Category 5e and Category 6 may support 2.5G/5GBASET? • Are there means for mitigating or improving the installed base of Category 5e and Category 6 cabling? • What is the recommendation for new installations? Cabling Guidelines • TIA TSB-5021 “Guidelines for the Assessment and Mitigation of Installed Cabling to Support 2.5GBASE-T and 5GBASE-T” (draft 1.1 July 2016) • ISO/IEC TR 11801-9904 “Information Technology - Implementation and Operation of Customer Premises Cabling – Part 9904: Guidelines for the use of installed cabling to support 2,5GBASE-T and 5GBASE-T applications” (PDTR, March 2016) Are Category 5e and Category 6 specifications changing ? • There are no plans to change or revise any of the Cabling standards for Category 5e and Category 6 specifications • However, existing Category 5e and 6 links/channels are being evaluated for extended frequencies and additional specifications needed to support 2.5G/5GBASE-T • If the evaluation passes, there is a good chance that 2.5G/5GBASE-T applications will work on these installed links/channels • If the evaluation fails, the links/channels are still Category 5e or Category 6 and can continue to be used for other applications Qualifications needed to support 2.5G/5GBASE-T • Category 6 Ø No changes to internal parameters already specified up to 250 MHz Ø Characterize alien cross-talk noise coupling up to 200 MHz • Category 5e Ø Internal parameters “extrapolated” to 250 MHz Ø Link and channel NEXT and PSNEXT relaxed above 100 MHz from 20 dB slope to 40 dB slope Ø Characterize alien cross-talk noise coupling up to 200 MHz Qualification Test procedures • Lab and field test procedures are already available to qualify internal parameters ( IL, RL, NEXT, FEXT, Delay, Delay Skew) for Category 5e and 6. • Inspection together with comparison of use cases against similar use cases already measured in the laboratory for alien cross-talk can be used for a first estimate to qualify existing Category 5e and 6 cabling • New alien cross-talk qualification using ALSNR procedure is available in the Lab and existing field certifiers can be upgraded to perform ALSNR testing Alien limited SNR risk matrix (source TIA TSB-5021) Viability of 5G over Category 5E cabling V = verification recoMMended. E = EstiMated to support. N/A = This configuration is not applicable. Viability of 5G over Category 6 Cabling V = verification recoMMended. E = EstiMated to support. N/A = This configuration is not applicable. Mitigation to improve performance • Separate the equipment cords • Enable NBASE-T downshift • Use Non-adjacent positions on patch panels for 5GBASE-T • Unbundle the horizontal cables • Reconfigure the cross-connect as an interconnect • Replace equipment and patch cords with category 6A components • Replace connectors with category 6A connectors • Replace the horizontal cable with category 6A horizontal cable Recommendation for new installations • For new installations intended to support WAPs and other applications supporting 2.5 Gb/s or faster, it is strongly recommended to use category 6A cabling which supports all data rates up to 10 Gb/s • No additional field testing is needed for Category 6A • If Category 5e or Category 6 is used, qualification testing is defined in TIA TSB-5021 and general performance requirements in ANSI/TIA-568-C.2 NBASE-T™ 2.5GBASE-T/5GBASE-T Field Testing RecommenDations Dan Payerle Business unit manager – IDEAL Networks Member – NBASE-T Alliance DOES A CABLING PLANT NEED TO BE RE-TESTED TO SUCCESSFULLY DEPLOY NBASE-T? Not necessarily… • With proper inspection and mitigation techniques, NBASE- T can be successfully deployed in most existing cabling plants that have been certified to pass TIA-568-C.2 performance requirements.
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