TimeProvider Edge Boundary Clock. Edge Master Clocks. Key Features

Transcription

1 DATASHEET Edge Boundary Clock Key Feaures Sandalone IEEE 1588 Precision Time Proocol Boundary Clock Flexible PTP profiles o suppor boh frequency and phase synchronizaion ITU-T G82751 Phase/Time Synchronizaion suppor Designed o mee he fuure ITU-T G82752 profile for phase synchronizaion Suppor for 8 o 512 (opional) PTP cliens Gigabi Eherne inerfaces Synchronous Eherne, inpu and oupu E1/T1, inpu or oupu (opion) 10 MHz, PPS and TOD oupu DC or AC power models OCXO or rubidium holdover oscillaor models Local and remoe CLI, web inerface, SNMP raps TimePicra Synchronizaion Managemen Sysem suppor Key Benefis Sync soluion for he mobile nework edge: 4G/LTE and small cells No change ou or upgrade of nework hardware Miigaes impac of backhaul noise, packe delay variaion and load asymmery Synchronizaion proecion for high nework availabiliy Preserves curren MPLS nework engineering Major Applicaions LTE-FDD, LTE-TDD, LTE-A neworks Eherne backhaul neworks The Microsemi TimeProvider 2300 is an advanced, sandalone IEEE 1588 Precision Time Proocol (PTP) Boundary Clock opimized o enable deploymen of small cells and mee he sringen iming and synchronizaion requiremens of 4G/LTE neworks I is designed for deploymen a seleced locaions in he backhaul nework following he approach anicipaed in he proposed ITU-T G82752 sandard for parial on-pah suppor This approach enables iming from a cenrally locaed grandmaser o be mainained over currenly deployed nework equipmen eliminaing he need o upgrade every elemen o include a PTP boundary clock funcion This synchronizaion overlay soluion is made possible by feaures no ypically found in inegraed boundary clock designs Using Microsemi s advanced PTP clien sofware and adapive iming calculaions, hese capabiliies include superior clock recovery algorihms ha deermine he bes imesamps on which o base he offse calculaion, he abiliy o miigae for iming impairmens, faser clock recovery imes, he abiliy o adap for load asymmery, and he abiliy o leverage frequency inpu from SyncE or E1/T1 signals The TimeProvider 2300 also offers he opporuniy o upgrade he reference oscillaor o exend he holdover ime in he even inpu signals are los suppors from 8 o 512 PTP cliens, and offers addiional oupu capabiliies ha allow i o suppor legacy frequency iming applicaions, including E1/T1, 10 MHz, pulse per second (PPS) and ime of day (TOD) When deployed in an end o end nework wih Microsemi s TimeProvider 5000 PTP Grandmaser and TimePicra Synchronizaion Managemen Sysem, carriers can also benefi from superior monioring informaion and managemen capabiliies Edge Maser Clocks The coninuing evoluion of mobile nework echnologies has driven he need for increased accuracy and greaer availabiliy of iming and synchronizaion signals A he same ime, backhaul neworks wih high packe delay variaion presen iming jier variaion and asymmery challenges ha are difficul o solve wih curren soluions Furhermore, deploying a GNSS receiver a every locaion is impracical, paricularly in many small cell environmens Togeher, hese issues creae he need for a new overall Synchronizaion Disribuion Archiecure for LTE neworks Edge Maser clocks are PTP synchronizaion equipmen designed for deploymen in curren neworks by locaing a grandmaser a or near he edge or by overlaying he nework wih advanced boundary clocks a designed locaions They enable mobile nework ransiions o include small cells, and hey suppor he sringen LTE-TDD and LTE-A phase and ime requiremens wihou overhauling he curren backhaul nework In frequency synchronized neworks (LTE-FDD, as well as 2G/3G), Edge Maser equipmen can be deployed o eliminae iming issues caused by diverse echnologies in he backhaul nework, high packe delay environmens, and asymmery inheren in Carrier Eherne neworks The is an advanced sandalone PTP boundary clock for deploymen a planned locaions o suppor precision ime disribuion over Eherne backhaul neworks Also included in he Edge Maser caegory, Microsemi s TimeProvider 2700 is a PTP grandmaser deployed a or near he edge of he nework Togeher, Edge Maser producs enable synchronizaion disribuion soluions ha allow he mobile nework o coninue o evolve wihou rerofi of exising backhaul equipmen and wihou changes o curren nework design and swiching/rouing policies 1

2 DATASHEET Meeing Sringen Synchronizaion Accuracy Requiremens Synchronizaion accuracy requiremens have gone from relaively rouine frequency specificaions (16 ppb on he nework side, 50 ppb for he air inerface) o more sringen ime and phase requiremens as igh as ±5 µsec or even ±15 µsec in some of he proposals under discussion in he sandards bodies Global Navigaion Saellie Sysem (GNSS) receivers codeployed or inegraed ino he mobile base saions are no always a feasible soluion for eiher echnical or economic reasons (saellie visibiliy and anenna deploymen coss for example) Primary Reference Time Clock performance, specified by ITU-T G8272, mees he accuracy requiremens using a GNSS signal (GPS or GLONASS) as a reference, and he IEEE 1588 Precision Time Proocol CORE AGGREGATION can deliver he needed accuracy under he righ condiions However backhaul neworks wih many hops and asymmeric pahs beween he grandmaser and he PTP clien, or neworks wih muliple ranspor echnologies, or hose wih high packe delay variaion due o loading or oher issues, canno be sure o consisenly mee he required specificaions One soluion is o upgrade he backhaul nework for Synchronous Eherne and include a PTP boundary clock in every ranspor elemen This is he approach in ITU-T G82751 wih full iming on pah suppor from he nework This soluion requires ha every nework elemen beween he grandmaser and he clien suppor Synchronous Eherne and include a boundary clock funcion a soluion ha is no always feasible due o he high cos o upgrade a nework or because he mobile carrier employs 3rd pary neworks for backhaul Furhermore, operaing a Eherne Layer 2, G82751 may obsolee or conflic wih he curren MPLS nework design and provisioning policies of he curren backhaul nework A beer soluion is o deploy an Edge Maser class of produc, using he approach proposed in G82752 Figure 1 depics deploymens a planned locaions This deploymen miigaes or eliminaes issues inroduced by he performance of he backhaul, and herefore, makes unnecessary he need o upgrade he enire backhaul nework o include boundary clocks in every nework elemen Operaing over exising neworks a Layer 3, his soluion also preserves curren MPLS and oher nework provisioning policies and engineering pracices, and i is compaible wih and leverages previous invesmen in using he G82651 profile (and pre-sandard profile) for frequency synchronizaion ACCESS Rb Time Picra T imep r ovider 2300 TimeProvider 5000 Rb Macro enodeb Rb TimeProvider 2700 Small Cell Aggregaion TimeProvider 5000 Mero Small Cells Figure 1: Synchronizaion overlay using advanced PTP boundary clocks Boundary Clocks are deployed in engineered locaions o suppor accurae ime delivery across he backhaul nework, or where GNSS is eiher no available (urban canyons, subways) or no pracical o deploy The Microsemi TimeProvider 5000 and TimeProvider 2700 Grandmaser clocks inegrae G8272 complian Primary Reference Time Clock capabiliy Rubidium oscillaors, eiher in he base saions or he PTP Edge Maser Clock, exend he holdover period when he primary reference is los In he boundary clock, invesmen in he high grade oscillaor is leveraged across muliple base saions The TimePicra Synchronizaion Managemen Sysem provides remoe managemen of he synchronizaion equipmen and visibiliy of all PTP cliens 2

3 GNSS (GPS and GLONASS) and Small Cells Inegraed GNSS receivers are a viable alernaive for iming of macro enodeb equipmen, hough operaions would sill be jeopardized by he well publicized vulnerabiliies of GNSS sysems, and so using nework disribued synchronizaion a leas for backup is considered bes pracice Mero or public access small cells presen new challenges for synchronizaion They require igh iming accuracy, bu are ofen deployed in locaions where adequae GNSS signal recepion is no feasible: indoors, unnels and urban canyons for example is designed for cos effecive deploymen a small cell aggregaion sies From his locaion mos small cell backhaul links can suppor disribuion of PTP iming o small cell base saions Should he small cell backhaul links hemselves include many hops or high packe delay variaion (PDV), he problem can be solved by deploying an advanced boundary clock a seleced small cell nework nodes Proeced Synchronizaion As igher synchronizaion becomes more essenial o he normal operaion of he nework (Iner-Cell Inerference Coordinaion, for example) he negaive impac of loosing synchronizaion becomes more significan Rubidium oscillaors provide a way o proec synchronizaion by delivering bes-inclass holdover performance (phase iming of ±15 µsec for up o 24 hours) Ofen seen as expensive upgrades for individual macro base saions, rubidium oscillaors in an advanced boundary clock are now more affordable as heir cos is amorized across an enire cluser of small cells and co-locaed macro base saions Equipmen The PTP Boundary Clock provides wo gigabi Eherne inerfaces in a combo por configuraion supporing use of eiher copper or opical connecions They are configured as one PTP inpu por and one PTP oupu por Synchronous Eherne is suppored on boh pors Models and opions are available o suppor 8 o 512 PTP cliens; all operaing a he full 128 messages per second rae Clien capaciy can be increased in he field wih sofware license opions The is available wih eiher an OCXO or rubidium oscillaor; each delivering a differen level of phase and frequency holdover performance and allowing operaors o beer opimize heir nework SLAs The includes a programmable 10 MHz or 1 PPS BNC por and a PPS+TOD RS422 on an RJ45 connecion Models wih eiher dual DC or a single AC power inpu are available Using passive cooling, he TimeProvider 2300 has no fans Sofware License Opions Licensed sofware opions for he include: Greaer clien capaciy: PTP clien capaciy in deployed unis can be increased o 16, 32, 64, 128, 256 or 512 cliens, allowing nework engineers o design for capaciy hey need oday and be proeced for increased requiremens in he fuure E1/T1 Inpu/Oupu: The E1/T1 sofware opion acivaes his por for use as eiher an inpu or oupu As an inpu he signal provides a frequency reference o he clock funcion As an oupu i can be used for synchronizaion of equipmen using his esablished iming reference Defaul Profile: Enables layer 3 mulicas capabiliies for operaion in addiional nework scenarios DATASHEET Deploymen of 4G/LTE neworks and small cells presen new echnical and economic issues for nework planners and engineers A major challenge is o mee sringen iming requiremens over backhaul pahs ha were no originally designed o deliver synchronizaion a he level of accuracy needed Upgrading he backhaul nework or deploying GNSS receivers a every base saion and small cell is ofen no possible for echnical or economic reasons A new ype of synchronizaion equipmen is needed: he PTP Boundary Clock and is companion produc, he TimeProvider 2700 PTP Grandmaser, enable synchronizaion archiecures ha are more feasible for many nework scenarios 3

4 DATASHEET Specificaions Inerfaces 1 AC power model, IEC C14 socke 1 DC power model, dual -48 VDC erminal block 1 Rese buon 1 RS232 serial console por, (57,600 bps), DB9 1 Gigabi Eherne Managemen por - Shielded RJ45, 100/1000 BaseT Eherne 2 Gigabi Eherne PTP/SyncE inpu and oupu combo pors suppor eiher: - Shielded RJ45, 100/1000 BaseT Eherne - SFP (opical), 1000 BaseX One combo por is reserved for use as a PTP inpu (clien) and he oher combo por is reserved for use as a PTP oupu (maser) 1 E1 or T1 inpu or oupu, sofware configurable, shielded RJ45 (opion) - G703/9, G823/G824 sync inerface compliance 1 Time of Day (TOD) oupu por, RS422 Daa (9600 Baud) wih pulse per second (PPS) signal, shielded RJ MHz or 1 PPS oupu por, BNC (f) 2 Grounding lugs IEEE PTP Oupu PTP oupu clien capaciy: 8 in basic models, opions for 16, 32, 64, 128, 256 or 512 cliens Up o 128 messages per second per clien 1-sep and 2-sep clock PTP profiles - ITU-T G82651 (layer 3 unicas, IPv4) - Telecom-2008 Profile (layer 3 unicas, pre-sandard ITU-T G82651, IPv4) - Eherne-Defaul Profile (layer 2 mulicas, IEEE Annex F) - Defaul Profile (layer 3 mulicas, IEEE ) (opional)) - ITU-T G82751 Phase/Time Profile VLAN (8021Q, 8021p) Up o 64 unique VLANs Bes Maser Clock Algorihm (BMCA) IEEE PTP INPUT Muli-sync funcion uses boh PTP and a frequency inpu (SyncE or E1/T1) All configurable using reference prioriy or reference qualiy 1-sep or 2-sep clock Telecom-2008 Profile (layer 3 unicas, pre-sandard ITU-T G82651, IPv4) VLAN (8021Q, 8021p) Holdover Performance Oscillaor Phase ±15 µsec Phase 5 µsec Phase 10 µsec Freq 16ppb OCXO 1 hour 4 hours 12 hours 1 monh Rubidium 24 hours 3 days 5 days 5 years Holdover values are approximae and assume operaion a consan emperaure, no iniial frequency or phase offse, and ha he unis has been powered on for 2 weeks and locked o PTP inpu for hree consecuive days Synchronous Eherne SyncE can be used as a frequency inpu or i can be generaed as an oupu (as a maser) Conforms o relevan secions of ITU-T G8261, G8262, and G8264 Eherne Synchronizaion Message Channel (ESMC) Nework Suppor IPV4 HTTP/HTTPS/SSL ICMP (RFC 792) DHCP Clien (RFC2131) IEEE Precision Time Proocol IEEE 8021Q, 8021p VLAN filering/agging DSCP Mechanical Size: Heigh: 173 in (44 mm); 1 RU Widh: 1724 in (438 mm) Deph: 930 in (237 mm) Deph: 1007 in (256 mm) including connecors on faceplae Rack Mouns: 19 in and 23 in rack moun opions Weigh: AC power models: 75 lbs (34 kg) DC power models: 80 lbs (36 kg) Environmenal Operaing emperaure - OCXO models: -40 C o +65 C, cold sar a -20 C - Rubidium models: -5 C o +55 C Sorage emperaure: -40 C o +70 C Relaive humidiy: 5% o 95% Power DC power models: dual power feeds, -384 o -72 VDC AC power models: VAC, 50/60 Hz Power consumpion - OCXO model wih DC supply: 20 Was (max), 17 Was (ypical) - Rubidium model wih DC supply: 28 Was (max), 20 Was (ypical) - OCXO model wih AC supply: 43 Was (max), 37 Was (ypical) - Rubidium model wih AC supply: 60 Was (max), 43 Was (ypical) EMC Compliance FCC Par 15 (Class A) AS/NZS CISPR22 (Class A) EN55022 (Class A) KN55022 (Class A) ICES 003 (Class A) VCCI (Class A) EU 2004/108/EC Elecromagneic Compaibiliy Direcive EN Telecommunicaions Nework Equipmen (EMC) 4

5 DATASHEET Specificaions EMC Immuniy EN55024 (Class A) KN55024 (Class A) - EN ESD - EN Radiaed Immuniy - EN EFT - EN Surge - EN Low Frequency Common Immuniy - EN Power Line Harmonics - EN Volage Flucuaions / Flicker - EN Volage Dips and Sags Safey Compliance UL/CSA (2nd ediion) CAN/CSA-C222 No (2nd ediion) IEC CB Scheme (2nd ediion) EN (2nd ediion) CE Mark ENVIRONMENTAL COMPLIANCE EN , Class T32 ETSI EN (1999) Transporaion, Class T23 ETSI EN (2000) Sorage, Class T12 RoHS (6 of 6) Nework Equipmen Building Sysem NEBS Level 3*, GR-1089 Managemen And Securiy SNMP v2c, v3 raps SYSLOG CLI, local (serial) and remoe (elne/ssh) Web inerface (HTTP/HTTPS) Muli level user access Abiliy o disable managemen inerfaces Remoe sofware upgrade and rollback TimePicra Managemen Sysem (purchased separaely) Models and Opions Edge Boundary Clock - 8 PTP clien capaciy, upgradable - Rack moun ears and screws Power supply models: AC or DC Oscillaor models: OCXO or Rubidium SW license opions - PTP clien capaciy upgrade: 16, 32, 64, 128, 256 or 512 cliens - Enable E1/T1 por - Enable PTP Defaul Profile (layer3 mulicas) HW accessories (no included) - AC power cords - Eherne opical SFP ransceivers Ground AC Power (alernaive o DC, no shown) -48 VDC Rese Dual Buon Feeds Craf Por Eherne 2x GigE Mgm Pors Copper or Opical E1/T1 TOD Pors 10Mhz or 1PPS Por Ground *: When following deploymen guidelines as specified in he user manual 5

6 DATASHEET Packe Delay Variaion (PDV) and Asymmery Timing and synchronizaion, fundamenal in all mobile neworks, is even more criical as small cells are added and neworks evolve o LTE-TDD and LTE-A echnologies Backhaul nework performance can dramaically impac PTP iming accuracy, and hereby he mobile nework iself affecing service qualiy and cusomer saisfacion The problem is Packe Delay Variaion (PDV) which represens he change in laency from packe o packe Packe delay iself has no effec on he accuracy of he clock: consan delay would allow an accurae ime offse calculaion by he PTP clien Variable delay, however, induces noise in he PTP clien s percepion of he ime a he maser which can resul in variaion in ime calculaions based on he imesamps in he PTP packes Delay can vary as PTP packes are processed, buffered and queued along wih he payload raffic hrough he nework swiches and rouers, and i ends o be correlaed o nework load which can be highly asymmeric in naure As he amoun of raffic in he nework increases, he delay variaion is also likely o increase Time accuracy is affeced by boh he magniude of his variaion and how effecive he clien is a removing his noise The incorporaes Microsemi s advanced PTP clien echnology and a high qualiy reference oscillaor Advanced algorihms effecively filer his noise, allowing he iming signal a he base saion o remain wihin specificaion Frequency, Phase and Time Synchronizaion Frequency Synchronizaion T A =1/f A A B A B A B f A =f B Phase Synchronizaion f A =f B Time Synchronizaion f A =f B 01:00:00 01:00:00 T B =1/f B T A =1/f A T B =1/f B T A =1/f A T B =1/f B 01:00:10 01:00:10 Leading edge of he pulses are a same pace, bu no a he idenical momen Leading edge of he pulses are a he idenical momen Leading edge of he pulses are a he idenical momen and idenical ime Microsemi makes no warrany, represenaion, or guaranee regarding he informaion conained herein or he suiabiliy of is producs and services for any paricular purpose, nor does Microsemi assume any liabiliy whasoever arising ou of he applicaion or use of any produc or circui The producs sold hereunder and any oher producs sold by Microsemi have been subjec o limied esing and should no be used in conjuncion wih mission-criical equipmen or applicaions Any performance specificaions are believed o be reliable bu are no verified, and Buyer mus conduc and complee all performance and oher esing of he producs, alone and ogeher wih, or insalled in, any end-producs Buyer shall no rely on any daa and performance specificaions or parameers provided by Microsemi I is he Buyer s responsibiliy o independenly deermine suiabiliy of any producs and o es and verify he same The informaion provided by Microsemi hereunder is provided as is, where is and wih all fauls, and he enire risk associaed wih such informaion is enirely wih he Buyer Microsemi does no gran, explicily or implicily, o any pary any paen righs, licenses, or any oher IP righs, wheher wih regard o such informaion iself or anyhing described by such informaion Informaion provided in his documen is proprieary o Microsemi, and Microsemi reserves he righ o make any changes o he informaion in his documen or o any producs and services a any ime wihou noice Microsemi Corporaion (Nasdaq: MSCC) offers a comprehensive porfolio of semiconducor and sysem soluions for communicaions, defense & securiy, aerospace and indusrial markes Producs include high-performance and radiaion-hardened analog mixed-signal inegraed circuis, FPGAs, SoCs and ASICs; power managemen producs; iming and synchronizaion devices and precise ime soluions, seing he world s sandard for ime; voice processing devices; RF soluions; discree componens; securiy echnologies and scalable ani-amper producs; Eherne Soluions; Power-over-Eherne ICs and midspans; as well as cusom design capabiliies and services Microsemi is headquarered in Aliso Viejo, Calif, and has approximaely 3,600 employees globally Learn more a wwwmicrosemicom Microsemi Corporae Headquarers One Enerprise, Aliso Viejo, CA USA Wihin he USA: +1 (800) Ouside he USA: +1 (949) Sales: +1 (949) Fax: +1 (949) salessuppor@microsemicom wwwmicrosemicom 2015 Microsemi Corporaion All righs reserved Microsemi and he Microsemi logo are regisered rademarks of Microsemi Corporaion All oher rademarks and service marks are he propery of heir respecive owners DS/TimeProvider2300/ G