1、IEEE 1588xp$ ContentsBa H =ah3a “a Ba H IEEE 1588 # e“d Hxp PTP Hxp Pq q 1-HL P L. H| PF eb1.1 PTPh s Yqha Yhb Yqh ? l 1u HWD Yh1u HWDb1 Yqh SYNCaDelay_ReqaPdelay_ReqaPd l R1.2 h HWD 3? l Yqh H 3 HWDbh HWDV H H HWD Yq? 3 HWD3 /m Um A B Cu HWD L1.3 H h pYDelay Request-Response Mechanism HPeer Delay M
2、echanism1 H h pYP SyncaDelay_ReqaFollow_Up Delay_Resphh B PTPg ()()214321 4321 43() 2() 2ttDelayOfsett t Delay OffsetDelay t t t tOfsettt tt =+= =+= EnVV Hn YVn offset LC DelayYY OffsetyN1YV Offsetb2 H H . HW HYg Hb Pdelay_ReqPdelay_Resp Pdelay_Resp_Follow_Uphb YH H Hg master slave 1“b( )21 43() 2me
3、anPathDelay t t t ti“B Y/ bb) RERate Estimation e 1 HW9 = HWF Sync Follow_Uph1 l syncFollow_Up = HW9 1 H B) H1b = HWM H1vB 1i HKM 4 Peer_to_Peer i H! m U End_to_Endi H n) PTP HhZ T bi HB block block 9 g g HbYVPdelay_Req Pdelay_RespPdelay_Resp_Follow_Uph 9 bi H Hn /m Ub55 5 !+ a VB b PTP5 h m VI gbc
4、? H b1.5 xpV * 1y VQ 2 H1.5.1 y VQPTP MasteraSlave Passiveb KD H E sKz Hc E1 “1 E2 % E “1 E/ t5 1 E1 priority1 V H % V H 2 clockClassW% H TAI V6 3 clockAccuracylB H 4 offsetScaledLogVariancel H 5 Priority2 ! H 6 clockIdentity+SFV U?5bKD H E b#4 HBbeVQ /m U YH H T H9H H ?VQy sb=ah3PTPxp ? lh 9 HW hBh
5、hheaderh8bodyhsuffixFb2.1 hh2.1.1 transportSpecificNibble . b2.1.2 MessageTypeEnumeration42.1.3 versionPTPUInteger4? h “ portDS.versionNumberb2.1.5 domainNumberUInteger8Nh? domainNumberb2.1.6 flagFieldOcet2BtSV Uil /V2.1.7 correctionFieldInteger64 ns i 216 2.5nsV U0x0000000000028000 G h2.1.8 sourceP
6、ortIdentityPortIdentitysourcePortIdentiy ? hg “portDS.portIdentityb2.1.9 sequenceIdUInteger16“ Follow_UpaDelay_RespaPdelay_RespaPdelay_Resp_Follow_Upamanagementh h sequenceId VB HBg?BhBh sequenceId -B 19Z Tb2.1.10 controlFieldUInteger81 Y V17 !BF lZ PFhb2.1.11 logMessageInterval(Integer8) %h 2.2 Ann
7、ounceh V2.2.1 originTimestampTimestamp Announceh? H 0 ? HWM1s =b2.2.2 currentUtcOffset2.2.3 grandmasterPriority1UInteger8? “ parentDS.grandmasterPriority1b2.3.4 grandmasterClockQualityClockQuality? “ parentDS.grandmasterClockQualityb2.3.5 grandmasterPriority2UInteger8? “ parentDS.grandmasterPriority
8、2b2.3.6 grandmasterIdentityClockIdentity “ parentDS.grandmasterIdentityb2.3.7 stepsRemovedUInteger16? h H “ currentDS.stepsRemoved b2.3 Sync Delay_Reqh2.3.1 originTimestampTimestamp Synch One-step H H OriginTimestamp Sync l ns SynchcorrectionFieldoriginTimestamp Lb Two-step H H originTimestamp l ns
9、correctionField 0 Follow_UphV U2.4 Follow_Uph2.4.1 preciseOriginTimestampTimestampFollow_Uph preciseOriginTimestamp Synch Follow_UphSynch correctionField preciseOriginTimestampMF h? HWb2.5 Delay_Resph2.6 Pdelay_Reqhi reserved P Pdelay_Reqh Pdelay_ResphyBt Bh. HW“ b2.7 Pdelay_Resph2.9 5 h2.9.1 domain
10、Number of the headerdomainNumber “S domain2.9.2 sequenceId of the headerT BY managementh sequenceId l5 hsequenceId 9 B b2.9.4 startingBoundaryHopsUInteger8dY5 h startingBoundaryHops G f MbY5 h startingBoundaryHops boundaryHopsb2.9.5 boundaryHopsUInteger85 hH H :/ ? b2.9.6 actionFiledEnumeration45jFReserved4ACKNOWLEDGE3COMMOND2RESPONSE1SET0GETValuehexActiona “YH H “1 defaultDS2 currentDS3 parentDS4 timePropertiesDS5 portDSi H “1 transparentClockDefaultDS2 transparentClockPortDS “ sY static dynamic
