4-Overview of PON Technologies and System Architectures ... of PON Technologies an · PDF...

Click here to load reader

  • date post

    28-Aug-2018
  • Category

    Documents

  • view

    216
  • download

    0

Embed Size (px)

Transcript of 4-Overview of PON Technologies and System Architectures ... of PON Technologies an · PDF...

  • OverviewofPONTechnologiesandSystemArchitecturesPresenter: StephenKraimanSeptembe 2017

    Author:MichaelJ.EmmendorferSeptember26,2017

  • Copyright2015 ARRISEnterprises,Inc.Allrightsreserved.

    Agenda

    OverviewofPONStandards

    OverviewofEPON/10GEPON

    OverviewofDOCSISProvisioningofEPON(DPoE)

    CentralizedAccessArchitectureforPON andDistributedAccessArchitectureforPON

    OverviewofPurposeBuiltOLTSystemsandSDN/NFVSystemsforPON

    29September2017 OverviewofPONTechnologiesandSystemArchitecturesforSCTE 2

  • Copyright2015 ARRISEnterprises,Inc.Allrightsreserved.

    OverviewofPONStandardsHigh-Level

  • Copyright2015 ARRISEnterprises,Inc.Allrightsreserved.

    FTTPTechnologyOverview

    GPON(ITU-TG.984) 2.488Gbit/s downand1.244Gbit/supstream

    XG-PON1(ITU-TG.987) NotbackwardcompatiblewithGPON WDMCoexistence(parallelnetworks) 10Gbit/sdownand2.4Gbit/supstream

    XGS-PON(ITUG.9807.1) XGS-PON(10/10)

    NG-PON2(ITU-TG.989) Notbackwardcompatible(GPON,XGS,orXG-PON1) 2.4Gx2.4G,10Gx2.4G,10Gx10Gbit/s Timeandwavelengthdivisionmultiplexedpassiveopticalnetwork

    (TWDM-PON) Definesuseof4or8wavelengths

    RadioFrequencyoverGlass(RFoG)SCTE1742010 RFoGisamediaconversionPONtechnology DOCSISistheDataTechnology Supportsexistingcablepracticesandsystems CoexistswithData/IPPONtechnologies(e.g.EPON/GPON)

    IEEEPON(SharedMediaStandards)

    EPON(IEEE802.3ah) 1Gbit/sSymmetrical

    10G-EPON(IEEE802.3av) DefineBackwardCompatibilitywithEPON 1Gbit/sSymmetrical 10Gbit/sdownand1Gbit/supstream 10Gbit/sSymmetrical

    100G-EPON(IEEE802.3ca) 25G,50Gand100GEPON Standardisbeingdefined

    IEEEPoint-to-PointStandards 1Gbit/sOpticalEthernet(IEEE802.3z) 10Gbit/sOpticalEthernet(IEEE802.3ae) 40Gbit/sOpticalEthernet(IEEE802.3ba) ScalingtoolsCWDM,DWDM,andAWG

    29September2017 OverviewofPONTechnologiesandSystemArchitecturesforSCTE 4Source:ComparingIEEEEPON&FSAN/ITU-TGPONFamilyofTechnologies,MichaelJ.Emmendorfer,SCTE-ISBEWorkshop,September2014

  • Copyright2015 ARRISEnterprises,Inc.Allrightsreserved.

    PONStandardWavelengths

    GPON 1G-EPON XGPON1 10G/1G-EPON 10/10GEPON NG-PON2

    Spec ITU-TG.984 IEEE802.3bk-2013 ITU-TG.987 IEEE802.3bk-2013 IEEE802.3bk-2013 ITU-TG.989 Units

    PONRate(Gbps)

    2.488/1.244 1.25/1.25 10/2.5 10/1.25 10/10 4X10/10 Gbps

    DS WL 1480-1500 1480-1500 1575-1580 1575-1580 1575-1580 1524-1544 nm

    USWL 131010 131050 1260-1280 131050 127010 1596-1602 nm

    29September2017 5OverviewofPONTechnologiesandSystemArchitecturesforSCTE

    EPON:IEEE802.3ah1310nm50isthestandardhowever,MSOsoftenselecttheGPON1310nm10Narrowwavelengthbandoptics(10G/1Gupstreammayusenarrowbandopticsaswell)

    GPONUpstreamWavelengthEvolution:G.984.21310nm50Regularwavelengthbandoption,G.984.51310nm20Reducedwavelengthbandoption,G.984.51310nm10Narrowwavelengthbandoption

  • Copyright2015 ARRISEnterprises,Inc.Allrightsreserved.

    Overview of EPON / 10G EPONHigh-Level

  • Copyright2015 ARRISEnterprises,Inc.Allrightsreserved.

    PON Acronyms and Meaning

    Term MeaningODN Optical Distribution Network, referring to the out side plant OSP. Items include fiber and splitters. The

    ODN is traditional all passive, thus no powered equipment in this network segment.

    OLT Optical Line Terminal; located at the HE/CO. This network element controls the Downstream and Upstream signals. The Downstream are broadcast to each premises sharing a fiber. Upstream signals are combined using a multiple access protocol, invariably time division multiple access (TDMA). The OLTs "range" the ONUs in order to provide time slot assignments for upstream communication. Encryption is used to prevent eavesdropping.The OLT manages traffic to ensure bandwidth amounts and priority for specified services. This is like a CMTS in the cable network but terminates and manages optical connections end to end.

    ONU Optical Network Units; located at the CPE (term associated with EPON or the IEEE version of PON). This is like a Cable Modem or EMTA in the cable network but terminates an optical connections at the home/business/MDU.

    ONT Optical Network Terminals; located at the CPE (term associated with APON, BPON, GPON and is based on the ITU-T version of PON)

    729September2017 OverviewofPONTechnologiesandSystemArchitecturesforSCTE

  • Copyright2015 ARRISEnterprises,Inc.Allrightsreserved.

    DefinitionofPON

    Apassiveopticalnetwork(PON)isapoint-to-multipoint,fibertothepremisesnetworkarchitectureinwhichunpoweredopticalsplittersareusedtoenableasingleopticalfibertoservemultiplepremises,typically32-128.

    APONconsistsofanOpticalLineTerminal(OLT)attheserviceprovider'scentralofficeorheadendandOpticalNetworkUnits(ONUs)areplacedatenduserslocations.

    APONconfigurationreducestheamountoffiberfromtheCO/HEtotheenduserscomparedwithpoint-to-pointarchitectures.

    Downstreamsignalsarebroadcasttoeachpremisessharingafiber.

    Upstreamsignalsarecombinedusingamultipleaccessprotocol,invariablytimedivisionmultipleaccess(TDMA).

    TheOLTs"range"theONUsinordertoprovidetimeslotassignmentsforupstreamcommunication.

    TodayPONpoint-to-multi-pointfibertechnologysupportsspeedsfrom1Gbpsto10Gbps

    Distancefromthefacilitytotheenduserswhereoftenupto20km,howevertodaywithPONextendersandRemoteOLTsdistancefromthefacilitytotheendusersaremuchfurther(80kmorevenmoreispossible)thismeanactivenetworkelementsareintheopticaldistributionnetwork(ODN)makingPONnotexactlypassive.

    29September2017 OverviewofPONTechnologiesandSystemArchitecturesforSCTE 8

    Source:WikipediaandtheAuthorofthispresentation

  • Copyright2015 ARRISEnterprises,Inc.Allrightsreserved.

    Attributes of EPON

    Shared media technology (many users share the network)

    Subscribers sharing the same PON port could be up to 128 ONUs but often fewer (the number of ONU per PON port is typcially optical budget limited)

    EPON bandwidth may range for 1, 2, 10 Gbps Symmetrical

    Time slots are used dynamically to allocate bandwidth to subscribers

    Encryption is used to prevent eavesdropping (AES)

    Supports Voice, Video, and Data Services

    929September2017 OverviewofPONTechnologiesandSystemArchitecturesforSCTE

  • Copyright2015 ARRISEnterprises,Inc.Allrightsreserved. 10

    1Gx1G or 2G DS x 1G US ONUsChoice for New Install

    10G / 1G EPON ONUCustomer upgrades and/or New Installs

    10G / 10G EPON ONUCustomer upgrades and/or New Installs

    For the

  • Copyright2015 ARRISEnterprises,Inc.Allrightsreserved.

    EPONDownstream

    TheOLTBroadcaststhedatafromitstransmitter EachONUMACfiltersitsowntrafficbasedonLLIDforprocessing

    29September2017 OverviewofPONTechnologiesandSystemArchitecturesforSCTE 11

  • Copyright2015 ARRISEnterprises,Inc.Allrightsreserved.

    EPONUpstream

    TheOLTmakessureONUsdonottransmitatthesametimetoavoidcollisionsattheOLTopticalreceiver ToavoidcollisionstheOLTallocatesTimeSlotsknownasGATESorGrantstotheONU WhentheONUwouldliketotransmitdataarequestforbandwidth(timeslots)aresenttotheOLTthisisknownasaREPORT

    29September2017 OverviewofPONTechnologiesandSystemArchitecturesforSCTE 12

  • Copyright2015 ARRISEnterprises,Inc.Allrightsreserved.

    EPON Terms

    MPCP:MultipointControlProtocol MACControlProtocolthatallowstheOLTtodeterminethetransmissionwindowsofONUsinitsshareddomain.BasedinlargepartonDOCSIS

    LLID:LogicalLinkIdentifiers ThisisaformofmarkingtheetherframesacrossthesharedPONtoaspecificONU(CPE) TheremaybemultipleLLIDassignedtoeachONU ThedeterminationoftheuseofLLIDsmaybeassigntotypeofservice,e.g.data,voice,video.

    PacketClassification: Classificationisperformedateachingresspoint.Specificfieldsintheframessuchas802.1Q,DiffServ(TOS),Layer2/3Address,orLayer4portscanbeusedtomaptrafficintoLinkLayerIDsandServiceLevelAgreements.

    1329September2017 OverviewofPONTechnologiesandSystemArchitecturesforSCTE

  • Copyright2015 ARRISEnterprises,Inc.Allrightsreserved.

    BandwidthAllocationModes

    DynamicBandwidthAllocation(DBA)Scheduler DBAmayalsobereferredtoasDynamicSolicitedMode ONUsaskforbandwidthandtheOLTissuesgrantsbasedontheneedsoftheONUsneedingbandwidth IfONUsarenotactivelytransmittingtheyareperiodicallypolled IfthereisnocontentionforbandwidthONUsmayusethePONlinktothemaximumSLA IfthereisnodatatotransmitthePONtimeslotarenotused

    TimeDivisionMultiplexing(TDM)Scheduler(supportedbysomesystems) Grantsareissuedatafixedinterval,regardlessofONUsneedtotransmitdata. TDMmodeistimerbased,meaningthatbandwidthisallocatedwhenaprovisionedtimerexpires. ThismaybeusedinhighlycongestedlinkstoguaranteehighprioritytrafficiscarriedthroughthePON

    (MostEPONdeploymentsworldwideuseaDBAschedulerordynamicsolicitedmode)29September2017 OverviewofPONTechnologiesandSystemArchitecturesforSCTE 14

  • Copyright2015 ARRISEnterprises,Inc.Allrightsreserved.

    DBAREPORTandGATEMessages

    DBAusesREPORTandGATEMessagestorequestandgrantdatafortheONUtotransmitupstreamtoavoidcollisionsandschedulesbandwidthacrossthesharedmedia

    DBA:REPORT(BandwidthRequests) ONUreportsitsdatatransmissionneedsinitstransmitqueue ONUisperiodicallypolledinordertobeabletosendaREPORTorRequests ONUsmayaddaREPORTattheendofeachtransmission

    DBA:GATE(BandwidthGrants) OLTGrantstransmitopportunitiescalledGATEStoONU OnceGATE/grantissenttheOLTexpectsaburstfromthisONUtobereceivedattheOLTataspecifictimecalledaGrantWindow

    29September2017 OverviewofPONTechnologiesandSystemArchitecturesforSCTE 15

  • Copyright2015 ARRISEnterprises,Inc.Allrightsreserved.

    EPON and DOCSIS Comparison

    EPON LLID are very similar to DOCSIS Service Flows In fact DPoE adds DOCSIS Service Flow Concepts to EPON OLTs targeting the Cable Market There may be up to 16 bi-directional (downstream an