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Fttx fiber-count-planning-calculation

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A presentation to get the in-sight of the fiber calculation for FTTX deployment in a simple and clear approach

Published in: Technology
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Fttx fiber-count-planning-calculation

  1. 1. GK2345@GMAIL.COMFormula for FTTX – GPONFiber count calculation1Engineers make the world
  2. 2. 2• Understanding FTTX end to end connection• Illustration of different type of customerrequirement• A. Residential - GPON• B. Commercial - GPON• C. Un-split and partial split• Cable count planning equationAgenda
  3. 3. 3FTTX / GPON overviewGigabyte Passive Optical NetworkOLT ONUOptical Line TerminalOptical Network UnitPassive Optical SplitterONTONTJoint Closure1:32 SPLOptical Network TerminalONT1:2 SPL ONTUn-SPlitUSPPartial Split
  4. 4. 4 OLT – Optical Line Terminal – Central Office equipment. ONT – Optical Network Terminal for individual customerpremises. ONU – Optical Network Unit – for cluster of customers servedby copper as the last mile. USP – Un Split / Partial split.LegendGPON - Calculation Assume 1:32 split ratio To achieve 100 Mbps per customer, only 25 customer areconnected per PON For 1 PON download speed 2.5 Gbps = 2500 Mbps For 1 Customer download speed = 2500 Mbps / 25 = 100Mbps
  5. 5. 5Case studyMTRMTRResidential CustomerCommercial Customer1 2 For residential customer 100 Mbps is themaximum available bandwidth. For commercial customer the requirementgranularity cannot be decided during thesurvey stage as every commercialcustomer will have specific requirement. To have clear understanding and to serve1:X GPON and UnSPlit GPON, we have tounderstand the customer requirement inIT, telecom, application and capacity level. To plan and address the generalrequirement, we have to assume everyindividual customer is connected or readyto connect via patch cord installationduring provisioning.
  6. 6. 6GPON capacity EngineeringCentral Office MTR FTBOSP IBCOSP ODF OSP ODF1:21:4GPON PortP2P Port1:161:81:32IBC ODFBuilding where there isonly 8 customers available
  7. 7. 7GPON capacity EngineeringCentral Office MTR FTBOSP IBCOSP ODF OSP ODF1:21:4GPON PortP2P Port1:161:81:32IBC ODFBuilding where there isonly 16 customersavailable
  8. 8. 8GPON capacity EngineeringCentral Office MTR FTBOSP IBCOSP ODF OSP ODF1:21:4GPON PortP2P Port1:161:81:32IBC ODFBuilding where there isonly 32 customersavailable
  9. 9. 9GPON capacity EngineeringCentral Office MTRFTBOSP IBCOSP ODF OSP ODF1:21:4GPON PortP2P Port1:161:81:32IBC ODFBuilding where there is anyintegral number ofcustomer for GPONconnection.Divide by 32 to get thenumber of 1:32 splittersThe remaining GPONconnection to bedistributed among 1:16and 1:8 splitteraccordingly.For the expansion in thebuilding side GPONconnection, requiredsplitter combination to beequipped in CO and MTR.
  10. 10. 10GPON capacity EngineeringCentral Office MTR FTBOSP IBCOSP ODF OSP ODF1:21:4GPON PortP2P Port1:161:81:32IBC ODFCommercial customer whowant 2 Gbps downloadspeed
  11. 11. 11GPON capacity EngineeringCentral Office MTR FTBOSP IBCOSP ODF OSP ODF1:21:4GPON PortP2P Port1:161:81:32IBC ODFCommercial customer whowant 1 Gbps downloadspeed
  12. 12. 12GPON capacity EngineeringCentral Office MTR FTBOSP IBCOSP ODF OSP ODF1:21:4GPON PortP2P Port1:161:81:32IBC ODFCommercial customer whowant 500 Mbps downloadspeed
  13. 13. 13 Number of living units (individual customer)who will be identified with single invoice for alltelecom service from the service providerpoint of view has to be confirmed. The classification of the above data as shownin table under “Number of living units:” and thebusiness model with marketing strategy has toconfirm the FACTOR for various commercialand split ratio requirement. The fiber has to land in each living units(individual customer) and the flexibility toconnected in different configuration as shownin the illustration. The number of fiber required to enter a MTRcan be calculated with cable count planningequation.Cable count planning Equation
  14. 14. 14GK2345@GMAIL.COM

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