ulize 100g epon capacies with 4x25gb/s architecture · ulize 100g epon capacies with 4x25gb/s...
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U"lize100GEPONCapaci"eswith4x25Gb/sArchitecture
Yuxin(Eugene)DaiCoxCommunica"ons
IEEEPlenarymee"ng100GEPONTF,March2016Macao,CHINA
Outline
• Pathstoachieve100GcapacityforEPON• Bondedandun-bonded100GEPON• Burstrateandaveragerate• 100GEPONmigra>onandreferencemodels
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Pathstoachievehighcapaci"esincommunica"onnetworks
• Threewaystoachievehighcapacityincommunica"onsystems– HighserialTDMrate
• 100Gto400Gserialratesareusedtodayinlong-haulop>calnetworkswithcoherenttechnology.1Tb/sisfeasiblewithOFDMwithflexgrades.
– UsingWDM• WDMtechnologieshavebeenwidelyusedinthepastandtoday
– Channelbonding• Channelbondinghasbeenusedinaccessnetworksfrom>meto>mewithlegacytechnologies.BUTallhadbeeneventuallyreplacedbynewtechnologiesinunboundedfashions
• Channelbondinghasbeenthelastresourcetosolvecapacityproblems,andhasalwaysbeenreplacedbynewtechnologies
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Pathstoachieve100GcapacityforEPON• Therearealso3waystoachieve100GcapacityforEPON
– HighestserialTDMrate• 100Gserialneedscoherenttechnology• 25GTDMisconsideredtechnicallyfeasibleand40GTDMmaybecomefeasible
inthefuture
– UsingWDM• WDMisusedinP2MP,suchasNG-PON2
– Channelbonding• ChannelbondingisusedinP2PEthernet,suchas100Gand400G,butnotin
P2MP.• From10GEPONtohighercapacityNGEPON,itisnatural
togothroughtheprovenevolu"onstages• 25G,40GTDM,WDM…,thelastchoiceischannelbonding
• Thereisthepossibilitynewtechnologiesmayappearbeforewereachthechannelbondingstage
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Mul"-laneEthernetandchannelbonding
• ChannelbondinginP2MPop"calaccessdoescreateanumberofchallenges• MixedONUs,ie.mixed25G,50Gand100GONUs
• Schedulingefficiency,u>liza>onoflanes,cost…
• Choicesbetweentunableop>csandnon-tunableop>csop>ons(Discussedinanothercontribu>on)
• Mul"-laneEthernet+WDMcouldbeusedinP2MPop"calaccessnetworks,butdoesnotnecessarilymeanchannelbonding• Mul>-lane100GEPON:Four25GEPONsassignedto4lanes• Channelbonded100GEPON:4lanesarebondedtosupport100G
ONUs• Fromanetworkarchitectureandscalabilitypointofview,what
arethedifferences?• Fromaserviceofferingpointofviewwhatarethedifferences?
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100GEPON:bondedandun-bonded
G.652SMF
25GMACMACControlMACclientHigherlayers
RS
PMDPMAPCS
XXVGMII
25GMACMACControlMACclientHigherlayers
RS
PMDPMAPCS
XXVGMII
25GMACMACControlMACclientHigherlayers
RS
PMDPMAPCS
XXVGMII
25GMACMACControlMACclientHigherlayers
RS
PMDPMAPCS
XXVGMII
LogicalMAC(Mul"-channelControl)
25GMAC25GMAC
25GMAC25GMAC
MACControl
MACclient
Higherlayers
RS
XXVGMII
PMD
PMA
PCS
PMD
PMA
PCS
PMD
PMA
PCS
PMD
PMA
PCS
WDM
RSRS RS
MACclient
MACclient
MACclient
G.652SMF
LogicalMAC(MCC)
25GMAC
MACControl
Higherlayers
RS
PMDPMAPCS
MACclient
25GMAC
PMDPMAPCS
XXVGMII
25GMAC
PMDPMAPCS
XXVGMIIRS RS
MACclient MACclientLogicalMAC(Mul"-ChannelControl)
25GMAC
25GMAC25GMAC25GMAC
MACControl
MACclient
Higherlayers
RSXXVGMII
PMDPMA
PCS
PMDPMA
PCS
PMDPMA
PCS
PMDPMA
PCS
WDM
RSRS RS
MACclient
MACclient
MACclient
25GMAC
PMDPMAPCS
RS
MACclient
Un-bonded100GEPON
Bonded100GEPON
100GEPON:Tobandornottobond…• Systemcapacityneedstobeconsideredwithnetworkscalability• Fromanarchitecturepointofview,100GEPONislimitedbytheop>cal
powerbudget.• 16ONUsor32ONUsundercurrentpowerbudgettargetwith20kmreach
• Totranslatehighersystemcapaci>esintoservers’offeringability,higherscalabili>esarerequired
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LogicalMAC(Mul"-channelControl)
25GMAC25GMAC25GMAC25GMAC
MACControl
MACclient
Higherlayers
RS
XXVGMII
PMD
PMA
PCS
PMD
PMA
PCS
PMD
PMA
PCS
PMD
PMA
PCS
WDM
RSRS RS
MACclient MACclient MACclient
25G 50G 100G
6ONUs 5ONUs 5ONUs
Abonded100GEPON
LogicalMAC(Mul"-channelControl)
25GMAC25GMAC25GMAC25GMAC
MACControl
MACclient
Higherlayers
RS
XXVGMII
PMD
PMA
PCS
PMD
PMA
PCS
PMD
PMA
PCS
PMD
PMA
PCS
WDM
RSRS RS
MACclient MACclient MACclient
25G 25G 25G
16ONUs
Anun-bonded100GEPONUnderthecurrentop"calpowerbudgettarget,an100GEPONPONdoesnothaverequiredscalabilitytobenefitfrommixedtypesofONUs
Serviceoffering:averagebandwidth
• Fromaserviceofferingpointofview,averagebandwidthiswhatSLAoffers
• Theaveragebandwidthisalsowhat“speedtest”interprets
• Acustomercannotmeasure“burstrate”
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“Burstrate”and“grandfrequency”gives“averagebandwidth”
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Averagebandwidth:bondedandun-bonded
0
5
10
15
20
25
30
35
40
45
50
0.00 0.10 0.20 0.30 0.40 0.50 0.60 0.70 0.80 0.90 1.00
PON1:Thirtytwo100GONU
PON2:Thirtytwo25GONU
Gb/s
PONLoad
AveragebandwidthperONUPONload• PON1:Numberof100GONU=32• Fullload=1,32ONUs;halfload=
0.5,16Onus,…,• PON2:Numberof25GONU=32• Numberof25GONUperlane=8• Fullload=1,8ONUsperlane;half
load=0.5,4ONusperlane,…,
Trafficassump"ons• AllONUshaveconstantupstream
datatotransmit
• Averagebandwidthper100GONUandper25GONUisiden>calfromfullPONloadto1/8ofthePONload• At1/8PONload:Four100GONUsinPON1,one25GONUper-laneinPON2
Underheavytrafficassump"on,a100GbondedONUdoesnotgetmoreaveragebandwidththana25Gun-bondedONU
HistoricalviewsofPONdeployments
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1998 2000 2002 2004 2006 2008 2010 2012 2014 2016
EPON(802.3ah)
100GEPON802.3ca
1998 2000 2002 2004 2006 2008 2010 2012 2014 2016
EPON
StandardDevelopment
FieldDeployment
10GEPON
10GEPON(802.3av)
BPON GPON
BPON(G.983.2)
GPON(G984.x)
XGPON1(G987.x)
NGPON2(G989.x)
• Anaccessnetworkratewilllastformanyyears.Anewratewillbeintroducedwhenthereareserviceneedsandabitrateeconomyinfavor
Weexpectthatthe25Gb/saccessratewillalsolastforanumberofyears;the50Gb/sand100Gb/smayappearwhenthe25Gb/sratecannotmeetneeds
100GEPONmigra"onscenariosandreferencemodels
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25G 25G 25G
75GMAC
LLCLLCLLC
100GMAC
50GMAC
25GMAC
MACControl
LLC
Higherlayers
RSXXVGMII
PMD
PMA
PCS
PMD
PMA
PCS
PMD
PMA
PCS
PMD
PMA
PCS
WDM
Referencemodel1
25G 25G 25G
75GMAC
LLCLLCLLC
100GMAC
50GMAC
25GMAC
MACControl
LLC
Higherlayers
RSXXVGMII
PMD
PMA
PCS
PMD
PMA
PCS
PMD
PMA
PCS
PMD
PMA
PCS
WDM
…
Year1 Year2 Year3 Year4 Year6
• A100GEPONcannotscale25Gtoall4lanes• Mul>ple100Gsystemsareneededtodeploy25GONUswithunusedlanes
Referencemodel1doesscalewithall25GONUdeployment
100GEPONmigra"onscenariosandreferencemodels
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25G 25G
Referencemodel2
Year1 Year2 Year3 Year4 Year6
• A100GEPONscales25Gtoall4lanes
Referencemodel2scaleswell25GONUdeployment
LogicalMAC(Mul"-channelControl)
25GMAC25GMAC25GMAC25GMAC
MACControl
MACclient
Higherlayers
RSXXVGMII
PMDPMAPCS
PMDPMAPCS
PMDPMAPCS
PMDPMAPCS
WDM
RSRS RS
MACclient
MACclient
MACclient
25G 25G 25G 25G 25G 25G
Conclusions
• 100GEPONshouldsupport25Gb/sONUsinall4lanesun-bondedinapay-as-growtharchitecture
• Referencemodel2providestheflexibilitytoscaletoall25GONUsorbondtohigherrates
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