华为40GE接口设计方案

40GEInterfaceTreyMalpassZhongQiwenIEEE802.3HigherSpeedStudyGroup10-13Sept2007Seoul,[e-mail][e-mail].,Ltd.Page2IEEE802.3HSSG,10-13Sept2007Proposed40GEReferenceModelHIGHERLAYERSAPPLICATIONPRESENTATIONSESSIONTRANSPORTNETWORKDATALINKPHYSICALOSIREFERENCEMODELLAYERSLLC—LOGICALLINKCONTROLMACCONTROL(OPTIONAL)MAC—MEDIAACCESSCONTROLRECONCILIATIONqXGMII64B/66BCodingOTNMappingSerialPMAPMDDeskewSerialPMAPMDMEDIUMMEDIUMMDIMDIPCSLANLAYERS40GBASE-X440GBASE-RHUAWEITECHNOLOGIESCo.,Ltd.Page3IEEE802.3HSSG,10-13Sept200740GBASEInterfaceModelHIGHERLAYERSMACRECONCILIATIONqXGMII64B/66BCodingDeskeworOTNMappingSerialPMAPMDMEDIUMMDILANLAYERS40GBASEMODELPCSC1C2C3C410GPMA10GPMA10GPMA10GPMA10GPMD10GPMD10GPMD10GPMDWDMMUXDeskew4Channel64B/66BCodingC1C2C3C44Channel64B/66BCoding513Bor1217BCodingOTH3Mapping40GPMA40GPMD64Bits@625MHZor32Bit@1.25G40GBits/s40GBASE-X440GBASE-RqXGMIIHUAWEITECHNOLOGIESCo.,Ltd.Page4IEEE802.3HSSG,10-13Sept200740GBASE-RHIGHERLAYERSMACRECONCILIATIONqXGMII64B/66BCodingDeskeworOTNMappingSerialPMAPMDMEDIUMMDILANLAYERS40GBASEMODELPCSC1C2C3C44Channel64B/66BCoding513Bor1217BCodingOTH3Mapping40GPMA40GPMDqXGMII:64Bits@625MHZor32Bit@1.25GClientRate:40GBits/s40GBASE-RBus:4*64Bits@156.25MHZDataRate:41.25GBits/sDataRate:40.078125GBits/s@513B40.032895GBits/s@1217BLineRate:OTU343.018GBits/sHUAWEITECHNOLOGIESCo.,Ltd.Page5IEEE802.3HSSG,10-13Sept2007OTNTypeNominalbitratebit-ratetoleranceOPU3238/236×39813120kbit/s40150519.322kbit/sODU3239/236×39813120kbit/s255/236×39813120kbit/s40319218.983kbit/sOTU343018413.559kbit/s±20ppmHUAWEITECHNOLOGIESCo.,Ltd.Page6IEEE802.3HSSG,10-13Sept2007Transform64B/66Bto(64*N)B/(64*N+1)B•Whywehavetotransform64B/66Bto(64*N)B/(64*N+1)B?–Thedatarateof40GEusing64B/66BcodeinPCSis41.25GBits/sandthisrateisfasterthanOPU3payloadrate.–(64*N)B/(64*N+1)Bcodeismoreefficiency.•Howtocode(64*N)B/(64*N+1)B?–ThesolutionisfromStephenJ.Trowbridge,accordingtooption2ofthepapertrowbridge_01_0707.pdfonHSSGwebsite,thevalueN(valueofPOSfield)isfrom2to8and512B/513BisrecommendedwhenN=8.–Basingonthissolution,thePOSfieldofcontrolblockheadercanbeextendedto5bitsthenthemaximumNis32.HUAWEITECHNOLOGIESCo.,Ltd.Page7IEEE802.3HSSG,10-13Sept2007ExtendingNto5bits•HowtoextendthePOSfieldto5bits?–Ccodein64B/66B,7bitslong,istransformedto4bits.–Ocodein64B/66B,2bitslong,istransformedto2bits.–CBTypefiledoccupancies2bitsand4bitslongCBTXfieldisusedtoindicatethedifferencecontrolblock.–POSfieldisextendedto5bitslong.HUAWEITECHNOLOGIESCo.,Ltd.Page8IEEE802.3HSSG,10-13Sept2007(64*N)B/(64*N+1)BCode(N=32)FPOSFPOSFPOSFPOSFPOSFPOSFPOSFPOSFPOSFPOSFPOSFPOSFPOSFPOSFPOSQ0InputDataSynBlockPayload26501D0D1D2D3/D4D5D6D701D0D1D2D3D4D5D6D7ControlBlockFormats:BlockTypeFieldBitPosition:DataBlockFormat: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–1011––1010––1001––C3C4C5C6C71000––C2C3C4C5C6C70111–C4C5C6C70110–0100C1C2C3C4C5C6C7000100100011C0C1C2C3C0C1C2C3––––––––Q4Q0Q0Q40101BlockPayloadF0=LastControlBlock1=AnothercontrolblockfollowsthisonePOSOriginalposition(row)ofcontrolblockBTBTXCBre-defineasbelowBT:[2bit]BlockTypeBTX:[4bit]BlockTypeextensionCompressthe7bitCandOcodewordinto4bitcodeword.Ccodein64B/66B,7bitslong,istransformedto4bits.Ocodein64B/66B,4bitslong,istransformedto2bits.HUAWEITECHNOLOGIESCo.,Ltd.Page9IEEE802.3HSSG,10-13Sept2007OTNMapping•Alternativestobeconsidered:–512B/513BBlockmappedtoOPU3payloadusingGFP.–512B/513BBlockmappedtoOPU3payloadusingblockinterleaved.–1218B/1219BBlockmappedtoOPU3payloadusingblockinterleaved.NominalbitrateMinimalRateMaximumRateOPU340150519.322kbit/s40149716.311kbit/sAt-20ppmtolerance40151322.332kbit/sAt+20ppmtolerance512B/513B40078125.000kbit/s40074117.187kbit/sAt-100ppmtolerance40082132.812kbit/sAt+100ppmtolerance1216B/1217B40032894.737kbit/s40028891.447kbit/sAt-100ppmtolerance40036898.026kbit/sAt+100ppmtoleranceHUAWEITECHNOLOGIESCo.,Ltd.Page10IEEE802.3HSSG,10-13Sept2007Option1:513BBlockmappedusingGFP12345678910111213141516173824382540803808BytesColumnRowTCMACTPSI1234OTUkFECFASMSGCC0ResGCC1GCC2APS/PCCTCM3TCM2TCM1PMEXPTCM4TCM5TCM6ResResPT=GFPMappingResvResvResv……Byte0Byte1Byte255......…………CoreHeaderPayloadAreaPayloadLengthMSBPayloadLengthLSBCoreHECMSBCoreHECLSBPayloadTypeMSBPayloadTypeLSBTypeHECMSBTypeHECLSB0000111100010000PayloadInformationFixed8208Bytes(51