PreparingOp+calSpectrumResourcesfor100GEPON
1
Eugene(Yuxin)DAIPhDCoxCommunica,ons,[email protected]
IEEE802.3PlenaryMee+ng,NextGenera+onEPONStudyGroupNov.8-12,2015Dallas,TaxesUSAIEEE802.3NGEPONStudyGroup
Outline
• 100Gb/sEPONONUwavelengthrangeconsidera,ons
• Currentwavelengthalloca,onforPON• Wavelengthchoicesfor100Gb/sEPON
IEEE802.3NGEPONStudyGroup 2
100Gb/sEPONONUwavelengthrange–DWDMorCWDM?
• 25Gb/ssinglechannelEPONisthebuildingblockfor100Gb/sEPON• 25Gb/sEPONwilllikelyuse10GEPONop+cswithPAM-4orduo-binary
modula+ons• 25Gb/sEPONshouldadoptthewavelengthrangesimilartothatofthe
10GEPON– Upstream20nmrange– Downstream5nmrange
• 100Gb/sEPONisbuiltwith4X25Gb/s,therearetwochoicesfortheWDMwavelengthplan– DWDM:using100GHzor200GHzchannelspacing,similartoNG-PON2– CWDM,orspeciallydefinesWDMgradetoaccommodatethewiderwavelength
range
IEEE802.3NGEPONStudyGroup 3
Fromthecostandreusing10GEPONop+cspointofview,100Gb/sEPONshouldadoptcoarserwavelengthrange
Currentop+calspectrumalloca+ons
4
• The100nminObandresourceisusedbylegacyEPON/GPON.• The20nminlowerLbandresourceisusedbyRFoGUSandNG-PON2DS• The20nmCbandresourceisusedbyNG-PON2US• Havetokeep1550nmvideooverlay;andcannotreuse10GEPONwavelengths• Coarsewavelengthplanfor100Gb/sEPONneeds80nmforUSand20nmforDS
ReclaimingtheEPONUSandRFoGUSwavelengthsprovidestheresourcesneededfor100GEPON
1596nm-1603nm
1260 1280nm 1360nm
10G EPON US 1270+/-10nm
EPON and GPON US 1310+/-50nm
1480nm - 1500nm
EPON/GPON DS 1490+/-10nm
1575nm - 1581nm
10G EPON DS 1577-2/+3 nm XGPON 1578 -2/+3 nm
1590nm - 1610nm
RFoG US 1590/1610nm
1550nm - 1560nm
RF video
NG-PON2US
1524nm-1544nm
NG-PON2DS
ImpactsofdispersionsandPMDonPAM-4
IEEE802.3NGEPONStudyGroup 5
1.00E-12
1.00E-11
1.00E-10
1.00E-09
1.00E-08
1.00E-07
1.00E-06
1.00E-05
1.00E-04
1.00E-03
1.00E-02
1.00E-01
1.00E+00
0 2 4 6 8 10 12 14 16 18
PMDon
PMDoff
SER
Dispersionps/nm/km
BothdispersionsandPMDaffectsymbolerrorrate.ZeroorlowregiondispersionispreferredforPAM-4.
Simula,onisat20Gbaud/s
wavelength (nm) E U
0
0.3
0.6
0.9
1.2
1250 1300 1350 1400 1450 1500 1550 1600
Wavelength (nm)
Loss
(dB
/km
) O
1650
L C S
-10
0
10
20
Dis
pers
ion
(ps/
nm.k
m)
Dispersion
Fulldispersion
Halfdispersion
Zerodispersion
ChoicesofWavelengths
• Cbandwavelengthsexperiencehigherdispersions,itcouldbeaproblemforPAM-4orduo-binarymodula+ons
• Ebandhashigherop+caladenua+onsunderthewaterpeak• Obandisthebestchoiceforhigh-speedadvancedmodula+ons
LbandandRFoG• The20nmop+calspectrumresourcesinLbandfrom1590
nmto1610nmareusedbyRFoGUSandNG-PON2DS• ItpreventsoperatorsfromdeployingNG-PON2withRFoG• The20nmspectrainLbandaresuitablefor100GEPON
DS– Assumingthe5nmspacingfor100GEPON
• Reclaimingthe20nmLbandspectrumresourceswillbenefitoperatorswhodeployNG-PON2and/or100GEPON.
• However,RFoGisconsideredtolastforafairlylong+meperiodduringthemigra+on
• Weneedtofindaalterna+vewaytobackhaulRFoGsignalsanditwillbediscussedinaseparatecontribu+on
• Here,weassumingthe20nmLbandop+calresourcesareavailable
IEEE802.3NGEPONStudyGroup 7
OBandandCoexistconsidera+ons• Obandisthebestchoiceforhigh-speedadvanced
modula+ons• Wehaveagreedtoconsidercoexis+ngwiththeclosest
genera+on– Onlycoexistencewith10GEPONwillbeconsidered
• Obandspectrumresourcesintherangefrom1280nmto1360nmcanbereleasedfor25Gand100GEPON
• 25Gb/sEPONcouldcoexistwith10GEPONinWDMfashion,or
• 25Gb/sEPONcouldcoexistwith10GEPONinTDMfashioninupstream– Similartotheco-existenceof10GEPONandEPON– 25Gb/sEPONupstreamwavelengththereforeis1270nm– Onlyneedtofindadownstreamwavelengthfor25Gb/sEPON
IEEE802.3NGEPONStudyGroup 8
SbandandCband• SbandandCbandareusedforDWDMapplica+ons
– PrefertoreservethemforDWDM• Cbanddoesnothaveenoughspectrumresourcesfor4channelscoarserthenWDMfor100GEPON
• LowerSbandchannelsaretooclosetowavepeak• ThedispersioninCbandistoohighfor100GEPONupstream
• UsingCbandfor100GEPONUSwillforceamuchnarrowerwavelengthrange,suchas100GHzor200GHzasinNG-PON2
• Willnothavethecostbenefitsfromusingcoarser10GEPONop+calspec
IEEE802.3NGEPONStudyGroup 9
100GEPONwavelengthalloca+onop+onA
10
• 100GEPONUS:1280nmto1360nmwith20nmspacing• 100GEPONDS:1590nmto1610nmwith5nmspacing
1260 1280nm 1360nm
10G EPON US 1270+/-10nm
1480nm - 1500nm
EPON/GPON DS 1490+/-10nm
1575nm - 1581nm
10G EPON DS 1577-2/+3 nm XGPON 1578 -2/+3 nm
1590nm - 1610nm
1550nm - 1560nm
RF video
NG-PON2US
1524nm-1544nm
100GEPONUS
100GEPONDS
Op+onAisforWDMcoexistenceof25GEPONwith10GEPON.
100GEPONwavelengthalloca+onop+onB
11
• 100GEPONUS:1260nmto1340nmwith20nmspacing• 100GEPONDS:1590nmto1610nmwith5nmspacing
1260 1280nm 1360nm
10G EPON US 1270+/-10nm
1480nm - 1500nm
EPON/GPON DS 1490+/-10nm
1575nm - 1581nm
10G EPON DS 1577-2/+3 nm XGPON 1578 -2/+3 nm
1590nm - 1610nm
1550nm - 1560nm
RF video
NG-PON2US
1524nm-1544nm
100GEPONUS
100GEPONDS
1340nm
Op+onBisforTDMcoexistenceof25GEPONwith10GEPON.
100GEPONwavelengthalloca+onop+onC
12
• 100GEPONUS:1524nmto1544nmwith5nmspacing• 100GEPONDS:1590nmto1610nmwith5nmspacing
1260 1280nm 1360nm
10G EPON US 1270+/-10nm
1480nm - 1500nm
EPON/GPON DS 1490+/-10nm
1575nm - 1581nm
10G EPON DS 1577-2/+3 nm XGPON 1578 -2/+3 nm
1590nm - 1610nm
1550nm - 1560nm
RF video
100GEPONUS
1524nm-1544nm
EPONUS
100GEPONDS
1340nm
Op+onCusesCbandfor100GEPONupstream.Duetothelimita+oninCbandspectrumresources,a+ghterwavelengthrange(DWDM)isneededforONUupstream.
100GEPONwavelengthalloca+onop+onD
13
• 100GEPONUS:1260nmto1340nmwith20nmspacing• 100GEPONDS:1480nmto1500nmwith5nmspacing
1260 1280nm 1360nm
10G EPON US 1270+/-10nm
1480nm - 1500nm
100G EPON DS
1575nm - 1581nm
10G EPON DS 1577-2/+3 nm XGPON 1578 -2/+3 nm
1590nm - 1610nm
1550nm - 1560nm
RF video
NG-PON2US
1524nm-1544nm
100GEPONUS
RFoGUSNG-PON2DS
1340nm
Op+onDusesSbandfor100GEPONdownstream.AlthoughSbandispreferredforDWDM,itcouldbeusedfor100GEPONDSifcoarsemul+plechannelop+csareavailable
Conclusions
• Op,onsA&Barepreferred(differentincoexistscenario)• Obandisthebestchoiceforhigh-speedadvanced
modula,ons,especiallyfor100GEPONupstream• Sinceonlycoexistencewith10GEPONwillbeconsidered,
the80nmObandspectrumresourcescouldbereclaimedfor100GEPON
• Assuminganalterna,vecanbefoundtobackhaulRFoGsignal,the20nmLbandop,calresourcescanbereclaimedfor100GEPONdownstream
• Ifcoarsemul,plechannelop,csareavailableinSband,op,onDcouldbethechoiceaaerop,onsA&B.
IEEE802.3NGEPONStudyGroup 14
