Passive Optical LANs. R McGlashon 3M Uk plc BICSI UK Conference June 11, 2013

Transcription

1 Passive Optical LANs R McGlashon 3M Uk plc BICSI UK Conference June 11, 2013

2 Agenda Why choose fibre in the LAN Passive Infrastructure and splitters What is a PON What is POL Why choose POL POL Comparison with classic networks POL Implementations Conclusions

3 Why Choose Fibre for the LAN? Superior Performance Greater bandwidth and distance. No cross-talk, interference Easier Installation Fibre easier to install No shielding required for EMI and RFI Pulling Tension Copper cable 70 kg tension limit. Fibre cable 250 kg tension. Unmatched Security Harder to tap than copper; not vulnerable to EMI Easier to Upgrade Future-ready; SM last 5-7 generations of electronics During expansions and upgrades, use your existing fibre optic cable and replace only the electronics Non-flammable Fibre is all-dielectric, no sparks Environmentally Friendly Lower power for transmission...& its much smaller per capacity Smaller size and lighter weight but more capacity than copper cables Less materials, less an impact on environmental sustainability 48 Voice + 48 Data Copper Cables = 48 Users 12 strands fibre = >1500 Users 12 strands X 32 = 384 Drops 4 ports per (voice, video, and data)

4 Fibre vs. Copper: Relative Cable Bend, Size, and Strength 30mm Cable Diameter Relative Comparison: 2.9 mm 5.7 mm 7.5 mm Bend Radius Relative Comparison: 10mm 5mm 25mm (1 inch) Riser Rated cables Bend Insensitive Category Category SM Fibre Cable 6 UTP 6A STP 10 G Distance 40 km 45 m?? 100 m Cable Outer Diameter 2.9 mm 5.7 mm 7.5 mm Weight (300m) 2 kg 10 kg 18kg Minimum Bend Radius 10 mm (for BIF) 25 mm 35 mm Tensile Strength (Installation) 250 N 70 N 70 N

5 Singlemode Fibre Cabling Media Costs Less Singlemode fibre media costs less than multimode fibre or copper (up to 50% or more) Today s recommended media for new LAN horizontal installations: Multimode Laser Optimized OM3 or OM4 Cat 6/Class E minimum up to Cat 6 A /Class E A Horizontal Media Type Rel. Price/port Comments Fibre, Singlemode OS2, 2 fibre, indoor, LSZH Fibre, Multimode OM3, 2 fibre, indoor, LSZH Fibre, Multimode OM4, 2 fibre, indoor, LSZH 1 Single fibre can aggregate either backbone, horizontal, or both 2.4 Two fibres required Tx/Rx Pt-to-pt 3.4 Two fibres required Tx/Rx Pt-to-pt Copper Category 6, UTP LSZH 2.8 Cable to every Ethernet TO Copper Category 6A, FTP LSZH 4.6 Cable to every Ethernet TO

6 POL Passive Optical Infrastructure Fundamentals Benefits from an entirely singlemode fibre solution Multimode fibre cannot support the 20-km reach Multimode fibre cannot support multiple signal wavelengths on a single fibre Single mode supports much higher bandwidth (Terabit speeds) of throughput. It is inherently more futureready Connectivity is typically all simplex SC APC (couple of exceptions) SC APC for the splitter connectivity SC APC at interconnect/cross-connect for the PON infrastructure (FDH, FDT) SC APC at all s (some exceptions) Exceptions at the OLT: OLT GPON module ports have single fibre SC UPC OLT uplinks to routed network have dual fibre SFP, XFP (LC PC)

7 What is a Splitter? Cascaded Splitters Splitter type and ratio Loss (db) 1x4 2x x8 2x x16 2x x 32 2x

8 Optical Splitters for POL - Housing Shelf style or cassette style 19 Rackmount 1RU shelf format 1-, 2-, and 3-slot wide cassette module format All pre-terminated to SC/APC Low loss, pre-tested, plug and play Offer both one or two-fibre inputs per splitter (two inputs for redundancy configurations) Inputs and outputs intuitively labeled Inputs labeled 1,2 for same splitter Multiple splitters in same shelf/cassette labeled A, B, C Inputs Outputs

9 Passive Optical Network Technology What is it? Popular technology for FTTH worldwide (~150 million and growing) Uses mature ITU-T compliant G.984 GPON access technology standard (ratified 2003) Enables converged services (IP Ethernet Data, Voice analog/voip, Video analog RF/IPTV) Robust equipment In 2009, GPON platform was optimized for Enterprise LAN features OLT - optical line terminal - optical network terminal CO - central office

10 POL Network Architecture VOICE POTS/VoIP 0 20Km DATA IP/Ethernet OLT Desktop Terminals Any Ethernet /IP 10/100/1000BaseT VIDEO Switched IPTV Video Analog & QAM Ethernet Aggregation Switch 1490 nm 1310 nm 1550 nm Multiport Terminals Optional Analog services Each PON port from OLT Supports a single optical fibre (2 wavelengths) serving up to 64 end devices, and a maximum span of 20km GPON Standard Wavelengths Used 1490 nm downstream, Gb/s - Voice, Data and Switched Video traffic 1310 nm upstream, Gb/s Voice, Data and Video Signaling traffic Overlay Wavelengths within the 15xx range Typically used to support RF-based video delivery In future will be used to support migration to DWDM services

11 POL Network Architecture (2) The Optical Line Terminal (OLT) Acts as the central aggregation element Located in the Core Data Centre Replaces multiple L2 switches Can aggregate thousands of end users Passive Optical Network (PON) Completely passive infrastructure (no active/powered components) Single fibre carries multiple wavelengths 2.48 Gb/s downstream /1.24 Gb/s upstream Serve remote bldgs up to 20Km Ethernet Uplinks Ethernet Downlinks Passive Optical Splitter Rack Mount or modular versions Power splits the signal on a single fibre up to 32 ways Can be located indoor/outdoor, in TR, in work area The further the splitter is extended to the desk, the greater the savings in fibre infrastructure Optical Network Terminals () Terminates the fibre at the end user Converged voice, video, data all types End services delivered over Cat 6/6 A Some models also provide native POTS Desktop and Multi-desk unit models

12 LAN Bandwidth Allocation CIR/PIR 2.4 Gbps / 1.2 Gbps 200 kbps/1mbps Voice 10 Mbps/1Gbps Data User 1 OLT 200 kbps/1mbps Voice 1x 32 split Mbps/1Gbps User Data CIR/PIR Committed/Peak Information Rate 200 kbps/1mbps Voice Higher CIR available for lower splits 10 Mbps/1Gbps Data 15 Mbps/1Gbps Video Users 3 to 32

13 POL Equipment OLT Contains GPON and WAN cards Can support multiple cards to cover ~ 2000 s = ~7-8K ports Redundancy & reliability Multiple port sizes 1, 4, 24 common Support for local PoE, video & POTS Battery back up VLAN Support Authentication Quality of service capability for real time traffic Dynamic bandwidth management

14 Traditional LAN Side-by-Side Comparison Passive Optical LAN Min 2x Copper Cat5e/6/6a Cabling (100m max) Each Floor TR Access Layer Stacked Ethernet Switches Desktop s 1x32 Splitter (Ceiling Mounted) 1x32 Splitter (Rack Mounted) IDF/TR/FD with passive interconnect or not needed 24-Port s Rack Mounted 1x8 Splitter (Rack Mounted) Duplex Single or Multi Mode Fibre Riser Min 2x Copper Cat5e/6/6a Cabling (100m max) Simplex SM Fibre Riser WAN/ Internet Core Router WAN/ Internet Redundant Layer-3 Core Core Router Redundant Layer-3 Core GPON OLT

15 SM Fibre 20km Horizontal Fibre Configurations FTTD & FTTE OLT Splitters s Located in the MDF/Equipment Room/Building Distributor Provides Layer 2 Ethernet Aggregation Can support >7000 GbE ports Typically 1:32 from each GPON port 1:4 + 1:8 two stage splits allowed Offer 1 Gbps Ethernet ports w/wo POE+ Typically serve 1-8 users / end devices Located on desktops (FTTD) wall-mount or under desk-mount In ceiling or floor Zone boxes (FTTE) End Device Connectivity Ethernet Use Cat5e/Cat6 patch cords Some s offer analog/rf services port types WLAN WLAN Cat 5e/Cat 6 Cords Cat 5e/Cat 6 WAN FTTDesktop Fibre 1 Fibre 32 1:32 Splitter Passive Zone Box 1:4 and 1:8 2-stage Splits FTTE Active Zone Box Core Router/Switch Passive Riser Floor n 1:32 Splitter Fibre Distribution Hub Passive Riser Floor 1 FDH OLT OLT Aggregation Switch

16 SM Fibre 20km Fibre to the Floor Distributor OLT Splitters Located in the MDF/Equipment Room/Building Distributor Provides Layer 2 Ethernet Aggregation Can support >7000 GbE ports Typically a lower split count is chosen to maintain bandwidth subscription on each PON Multiport s Multiport s come in 24 port GbE or Fast Ethernet w/wo POE supported Horizontal Cabling Cat5e or Cat 6 sufficient for 1Gbps services This option maintains the legacy copper horizontal distribution that may already be present in a building WLAN WLAN Fibre to the Floor Distributor Cat 5e/Cat 6 Maintains legacy copper horizontal distribution Cat 5e/Cat 6 1:4 or 1:8 Splitter Riser Closet Floor n Copper Patch Panel One or more 24 port s Riser Closet Floor 1 Patch Panels One or more 24 port s Fibre Distribution Hub WAN OLT Core Router/Switch OLT Aggregation Switch

17 Drivers - Passive Optical LAN Total Cost of Ownership Capex & Opex Typical >50% TCO savings over standard architecture Capital Equipment Expenses savings from 25-70% Operational Expenses (power) savings from 60-80% Space saving in original design Contributes to Green Building Certification Power consumption savings of up to 80% Uses less active electronics (passive TRs) Less cooling in floor distributors Environmental Sustainability Much less materials used -- Example 4000 GbE ports: Saves 3700 kg of copper kg of plastic; (double this for Cat6A/7A) Future Proof Architecture Singlemode fibre high bandwidth over distances Reliable fibre plant to years or more Generations of electronics supported

18 Typical POL customers Large buildings Campus based sites Defence and military Government agencies and entities Large hospitality/hotels/resorts Higher and lower education campus area networks Large enterprise businesses Financial institutions Media companies Cruise ship communications Industrial/manufacturing plant networks Airports and stadiums

19 Conclusion All fibre network Removes copper distance limitation Uses well-tried architecture Redundancy and resiliency Application specific cabling Most suited to larger networks Bandwidth to user depends on splitter ratio