CPRI cable yog fiber ntau optic cable sib dhos siv los nqa cov teeb liab pem hauv ntej ntawm cov khoom siv hauv lub hauv paus (BBU) thiab cov cuab yeej siv xov tooj cua tej thaj chaw deb (RRU / RRH) hauv xov tooj ntawm tes, ua rawsCommon Public Radio Interface (CPRI)specification. Nws feem ntau siv duplex fiber ntau txuas nrog kev sib txuas lus- qib txuas thiab yog tsim los rau FTTA, chaw nres tsheb hauv paus, thiab ntauwd xa tawm ntau dua li kev sib txuas hauv tsev hauv tsev.
CPRI nws tus kheej tsis yog hom kab hluav taws xob - nws yog qhov kev sib txuas lus tshwj xeeb uas txhais tau hais tias cov neeg siv cov ntaub ntawv, cov ntaub ntawv tswj hwm, thiab synchronization taug kev ntawm xov tooj cua thiab baseband sab ntawm lub hauv paus chaw nres tsheb. Lub cable yog lub cev nruab nrab uas txhawb qhov interface. Kev nkag siab txog qhov sib txawv no pab cov neeg yuav khoom kom tsis txhob kho cov khoom lag luamfiber ntau thaj qaumraws li kev hloov pauv tau nrog kev xa tawm - qib CPRI sib dhos.
CPRI sawv rau dab tsi?
CPRI sawv cev rau Cov Xov Xwm Sib Tham Hauv Pej Xeem. Raws li covofficial CPRI v7.0 specification, nws txhais cov kev sib txuas sab hauv ntawm cov chaw nres tsheb hauv xov tooj cua ntawm Cov Khoom Siv Xov Tooj Cua (REC) thiab Cov Khoom Siv Xov Tooj Cua (RE). Cov kev qhia tshwj xeeb suav nrog Cov Txheej Txheem 1 thiab 2 ntawm OSI qauv thiab tau tsim los ntawm cov koom haum suav nrog Ericsson, Huawei, NEC, thiab Nokia (nrog Nortel pab txhawb rau cov qauv ua ntej ua ntej tawm hauv 2009).
Hauv kev hais lus hauv xov tooj txhua hnub, CPRI piav qhia txog kev sib txuas ntawm BBU (Baseband Unit) thiab RRU lossis RRH (Lub Chaw Hluav Taws Xob Hluav Taws Xob / Chaw Taws Teeb Hluav Taws Xob). Cov kev qhia tshwj xeeb ua haujlwm rau cov neeg siv dav hlau cov ntaub ntawv thauj, tswj thiab tswj lub dav hlau mechanisms, thiab synchronization - uas yog vim li cas qhov txuas no ntau dua li cov ntaub ntawv sib txuas yooj yim. Nws tswj kev ua haujlwm hauv xov tooj cua thoob plaws lub cev sib cais hauv lub network nkag mus rau hauv xov tooj.
CPRI Link ua haujlwm li cas?
Ib qhov txuas CPRI txuas cov txheej txheem ua haujlwm ntawm lub hauv paus chaw nres tsheb mus rau sab xov tooj cua. Hauv kev xa tawm ib txwm muaj, qhov no txhais tau hais tias kev sib txuas fiber ntau khiav los ntawm BBU - feem ntau nyob hauv chav tsev khoom lossis chaw nyob - mus rau ib lossis ntau dua RRUs mounted ntawm tus pej thuam, ru tsev, lossis ncej. Qhov kev sib txuas no yog kev sib txuas ntawm fronthaul hauv xov tooj cua nkag network, txawv ntawm backhaul lossis enterprise Ethernet kev sib txuas.
CPRI interface thauj cov digitized hauv -theem thiab quadrature (IQ) cov qauv siv sij hawm- faib multiplexing hla kev sib txuas kho qhov muag lossis hluav taws xob. Qhov txuas kuj yog synchronization thiab tswj cov ntaub ntawv, uas yog qhov tseem ceeb rau kev sib koom tes hauv xov tooj cua thoob plaws cov chaw kav hlau txais xov. Lub cev txheej txhawb ob leegtib - homthiabmultimodefiber ntau, nrog rau kev xaiv nyob ntawm seb qhov optical transceivers thiab kev sib txuas ntawm kev sib txuas.
CPRI Cable Assembly feem ntau suav nrog dab tsi?
Thaum cov kws tsim khoom lossis pab pawg muag khoom tshawb nrhiav "CPRI cable," lawv feem ntau tab tom nrhiav rau fiber ntau optic cable sib dhos ua rau kev siv pem hauv ntej. Ib qho kev sib dhos ib txwm muaj xws li cov khoom hauv qab no:
- Duplex fiber ntau txuas- feem ntau CPRI txuas yuav tsum muaj ob lub fibers (ib kis, ib qho tau txais), yog li kev tsim kho duplex yog tus qauv.
- Telecom- qib connectors- LC duplex connectors yog cov feem ntau nyob rau hauv cov khoom siv tam sim no. Paub meej tias tus connector hom tawm tsam koj cov khoom siv qhov chaw nres nkoj interface ua ntej xaj. Saibfiber optic connector homrau siv.
- Tsim nyog hom fiber ntau- ib leeg -mode (OS2 9/125) lossis multimode (OM3/OM4 50/125), phim rau cov transceiver modules ntsia hauv BBU thiab RRU.
- Kev tsim kho lub tsho sab hauv lossis sab nraum zoov- cov khoom siv sab hauv tsev-chaw jumper thiab ib lub pej thuam sab nraum zoov- mus rau- vaj tse khiav fim ntau yam khoom siv thiab huab cua. Cov rooj sib txoos sab nraum zoov feem ntau muaj cov armored lossis ruggedized designs. Saibsab nraum zoov cable sib dhosrau piv txwv.
- FTTA- tshwj xeeb tiv thaiv nta- rau fiber ntau-rau- lub- kav hlau txais xov khiav, cable sib dhos tej zaum yuav muaj xws li UV- cov tsho tiv thaiv, cov khoom siv dej tsis zoo, thiab rub- qhov muag txiav rau ntauwd installation. Tshawb nrhiavFTTA cov kev daws teeb meemrau tag nrho cov khoom siv.
Tib -Mode vs Multimode rau CPRI
Ib qho ntawm cov kev xav tsis zoo tshaj plaws hauv CPRI cable nrhiav yog tias CPRI tsuas yog siv ntau hom fiber ntau. Qhov ntawd tsis raug. CovCPRI specificationtxhawb ob qho tib si hluav taws xob thiab kho qhov muag interfaces ntawm lub cev txheej, thiab qhov kho qhov muag interface haum rau ob qho tib si -hom thiab multimode fiber ntau nyob ntawm hom transceiver thiab kab nqi.
Xaiv ib qho - hom fiber ntau thaum kev xa mus cuam tshuam nrog kev ncua ntev (feem ntau tshaj li ob peb puas meters), cov cab kuj sab nraum zoov- qib ib puag ncig, lossis thaum lub teeb tsaoptical transceiver modulesyog ib hom - hom (xws li 1310 nm LR optics). Xaiv multimode fiber ntau thaum qhov txuas luv luv - piv txwv li, nyob rau hauv tib chav tsev khoom lossis hla ib qho luv luv hauv -tsev khiav - thiab ob qhov kawg yog haum nrog multimode optics (xws li 850 nm SR modules).
Hauv kev xa tawm FTTA sab nraum zoov qhov twg BBU zaum ntawm theem hauv av thiab RRU tau teeb tsa rau ntawm tus pej thuam lossis lub ru tsev kaum lossis ntau pua meters deb, ib leeg - hom fiber ntau yog qhov kev xaiv zoo dua. Nyob sab hauv tsev co- teeb tsa los yog chaw kuaj mob yuav siv ntau hom. Cov kev txiav txim siab ib txwm yog qhov kev qhia tshwj xeeb ntawm transceiver thiab lub cev txuas qhov deb - tsis yog txoj cai daim pam txog qhov "CPRI cables" yuav tsum yog.
Feem ntau siv CPRI Cables
FTTA (Fiber-rau--Pantenna)) Kev xa tawm
FTTA architectures hloov cov tsoos coaxial RF feeder cables nrog fiber ntau optic txuas ntawm baseband thiab cov khoom siv xov tooj cua. Txoj hauv kev no txo cov teeb liab poob, txo qhov hnyav ntawm tus pej thuam, thiab txhawb nqa ntau dua - muaj peev xwm xov tooj cua teeb tsa. CPRI cable sib dhos tsim los rau FTTA feem ntau suav nrog sab nraum zoov- ntsuas fiber ntau,waterproof connectors, thiab mechanical tiv thaiv nta haum rau ntauwd nce toj thiab raug teeb tsa. Rau kev saib dav dav ntawm FTTA architecture, saib peb phau ntawv qhiaFTTA yog dab tsi.
Base chaw nres tsheb Fronthaul
CPRI tau ua lub luag haujlwm tseem ceeb hauv kev sib tshuam thoob plaws 2G, 3G, thiab 4G tes hauj lwm, thiab nws tseem siv tau rau ntau lub 5G- era qhov chaw uas cov tsoos BBU / RRU architecture tseem siv. Raws liTechTarget's CPRI txheej txheem cej luam, lub interface tau ua pov thawj nws cov txiaj ntsig los ntawm ntau tiam neeg wireless rau fronthaul kev sib txuas lus ntawm RRHs thiab BBUs.
Field Replacement and Maintenance
Ib feem tseem ceeb ntawm qhov tiag - ntiaj teb CPRI cable kev yuav khoom yog kev hloov pauv rau cov khoom sib dhos uas puas lawm, hloov kho dua tshiab rau cov kev sib txuas uas twb muaj lawm, lossis cov khoom seem rau kev saib xyuas thaj chaw. Nyob rau hauv cov xwm txheej no, cov neeg yuav khoom yuav tsum ua kom haum rau hom fiber ntau, hom ntawv txuas, cable ntev, thiab kev ntsuas sab nraum zoov ntawm cov khoom qub. Qhov no yog qhov uas muaj cov ntaub ntawv meej meej thiab tus neeg muag khoom txhim khu kev qha nrog kev cai sib dhos muaj peev xwm tseem ceeb tshaj plaws.
CPRI vs eCPRI: Dab tsi Hloov thiab Vim Li Cas Nws Tseem Ceeb
CPRI yog qhov classic fronthaul interface raws li lub sijhawm- faib multiplexing (TDM), tsim los rau taw tes- rau- taw tes txuas ntawm BBU thiab RRU. Nws ua haujlwm zoo rau 4G thiab cov tiam dhau los tab sis muaj qhov tsis tu ncua - cov ntaub ntawv bitrate kwj txawm tias cov tsheb thauj mus los tiag tiag, uas dhau los ua qhov kev sib tw bandwidth raws li xov tooj cua kev teeb tsa loj dua hauv 5G.
eCPRI (txhim kho CPRI) tau tshaj tawm hauv 2017 los ntawm tib lub koom haum - Ericsson, Huawei, NEC, thiab Nokia - los daws cov kev txwv no. Raws li coveCPRI v2.0 specification, lub interface txhim khu kev qha siv pob ntawv -raws li kev thauj mus los (feem ntau dhau Ethernet lossis IP) thiab txhawb nqa kev ua haujlwm tau yooj yim dua ntawm kev ua haujlwm ntawm xov tooj cua thiab baseband. Qhov no ua rau muaj qhov xav tau ntawm fronthaul bandwidth qis dua - kwv yees li ib -feem kaum ntawm CPRI hauv qee qhov kev teeb tsa - thiab tso cai rau cov tsheb thauj mus los sib qhia Ethernet- raws li kev thauj mus los.
Rau cov neeg yuav khoom, qhov ua tau zoo yog qhov no: yog tias koj tab tom tuav lossis nthuav dav 4G lossis ntxov -5G qhov chaw nrog cov tsoos BBU / RRU cais, koj tseem xav tau CPRI cable sib dhos. Yog tias koj qhov project cuam tshuam nrog 5G Open RAN kev xa tawm tshiab lossis qhov chaw nruab nrab / huab RAN architecture, eCPRI zoo li qhov cuam tshuam hauv kev ua si, thiab lub cev cable yuav yog tus qauv Ethernet-qib.fiber ntau thaj cablees tsis yog lub rooj sib txoos CPRI ib txwm muaj. Ntau tus neeg ua haujlwm tam sim no tab tom khiav ob qho tib si CPRI thiab eCPRI nyob rau tib lub sijhawm thaum lub network hloov kho tshiab.
Yuav Ua Li Cas Xaiv Txoj Cai CPRI Cable?
Xaiv qhov raug CPRI cable sib dhos yuav tsum tau kuaj xyuas ntau yam ua ntej muab qhov kev txiav txim. Siv qhov no ua ntej - daim ntawv teev kev yuav khoom:
- Khoom siv interface- paub meej tias hom connector thiab fiber ntau xav tau los ntawm BBU thiab RRU. Cov neeg muag khoom siv khoom siv tau siv LC duplex, SC, lossis cov qauv tsim tawm sab nraum zoov. Txheeb xyuas phau ntawv kho vajtse lossis cov khoom siv transceiver uas tau teeb tsa.
- Fiber hom- txheeb xyuas seb koj puas xav tau transceiverstib- hom lossis multimode fiber ntau. Tsis txhob xav tias multimode los ntawm lub neej ntawd. Hom fiber ntau tsis sib xws yog ib qho ntawm qhov ua yuam kev ntau tshaj plaws thiab raug nqi.
- Txuas qhov nrug- ntsuas qhov tseeb cable txoj kev, suav nrog ntsug ntauwd khiav. Kev khiav tawm sab nraum zoov feem ntau ntev dua li qhov xav tau thaum routing thiab cov kev pabcuam loops raug suav rau.
- Sab hauv lossis sab nraum zoov ib puag ncig- jumpers sab hauv tsev siv cov tsho PVC lossis LSZH.Sab nraum zoov kabxav tau UV- tiv taus, ya raws- kaw, thiab feem ntau siv armored. Ntauwd- kev teeb tsa sab saum toj kuj tseem yuav xav tau rub- qhov muag txiav kom nyab xeeb.
- Connector thiab sib dhos hom- paub meej tias koj puas xav tau ib qho ncaj duplex jumper, ib qho kev sib dhos, los yog ruggedizedIP67-rated waterproof connectorrau qhov chaw raug pom.
- OEM thiab cov kev xav tau ntawm tus neeg nqa khoom- qee tus neeg siv xov tooj ntawm tes thiab cov chaw muag khoom muaj cov kev sim tshwj xeeb, sau npe, lossis cov khoom xav tau rau kev thauj mus los pem hauv ntej. Paub cov no ua ntej ua tiav qhov kev txiav txim.
Common yuam kev kom zam?
Kho CPRI raws li qeb kab.
CPRI yog lub interface specification. Lub cable yog lub cev sib dhos uas txhawb nqa nws. Tsis yog txhua qhov fiber ntau patch qaum tsim nyog raws li CPRI cable, thiab tsis yog txhua "CPRI cable" uas teev hauv online ua tau raws li ib puag ncig lossis kev ua tau zoo ntawm kev xa tawm tiag.
Piv txwv tias multimode yog lub neej ntawd.
Ntau lub xov tooj sib txuas hauv ntej - tshwj xeeb tshaj yog sab nraum FTTA khiav - siv ib zaug - hom fiber ntau. Xaiv qhov tsis ncaj ncees lawm hom fiber ntau txhais tau hais tias qhov txuas yuav tsis ua haujlwm, tsis hais qhov zoo ntawm cable.
Tsis quav ntsej eCPRI hauv - tsim kev npaj tshiab.
Yog tias koj lub network txoj hauv kev muaj xws li 5G Qhib RAN, centralized RAN, lossis huab RAN, qhov kev sib tshuam pem hauv ntej yuav txav mus rau eCPRI. Txawm hais tias koj tab tom yuav CPRI cov rooj sib tham niaj hnub no, cuam tshuam kev tsiv teb tsaws lossis kev sib koom ua ke rau hauv koj txoj kev npaj.
Xaiv los ntawm tus nqi ib leeg.
Ib qho pheej yig dua jumper uas ua tsis tau ib puag ncig, kev sib raug zoo, lossis kev tso tawm - qhov kev xeem poob ua rau cov nqi qis dua qis dua - hauv tsheb rolls, rework, thiab downtime. Rau kev lag luam kev lag luam, kev sib dhos kev ntseeg siab tseem ceeb npaum li tus nqi tsev.
Cov lus nug nquag
Puas yog CPRI cable zoo ib yam li cov fiber ntau thaj qaum?
Tsis raws nraim. Ib tug CPRI cable yuav muab tib hom fiber ntau thiab connector raws li tus qauvfiber optic thaj qaum, tab sis nws tshwj xeeb yog xaiv los yog tsim rau fronthaul siv ntawm xov tooj cua thiab baseband khoom. Qhov no feem ntau txhais tau hais tias kev ua tau zoo dua specs, sab nraum zoov - ntsuas kev tsim kho, lossis cov kev sib txuas tshwj xeeb uas qhov dav dav - lub hom phiaj sab hauv tsev jumper tsis muab.
Cov khoom siv dab tsi ua rau CPRI cable txuas?
Nws txuas BBU (Baseband Unit) los yog REC (Xov tooj cua Equipment Control) mus rau RRU (Remote Radio Unit) los yog RRH (Remote Radio Head) nyob rau hauv lub chaw nres tsheb hauv lub hauv paus chaw nres tsheb hauv lub network.
Puas yog CPRI txhawb nqa multimode fiber ntau?
Tsis yog. CPRI txhawb nqa ob qho tib si - hom thiab multimode fiber ntau ntawm lub cev txheej. Qhov kev xaiv raug yog nyob ntawm hom optical transceiver thiab qhov txuas txuas. Rau kev sib piv kom ntxaws, nyeem peb phau ntawv qhia ntawmsingle-mode vs multimode fiber ntau.
Puas yog CPRI tseem siv hauv 5G tes hauj lwm?
Yog lawm, CPRI tseem nyob rau hauv kev siv dav hauv 5G-era networks, tshwj xeeb tshaj yog nyob rau hauv qhov qub BBU/RRU architecture. Txawm li cas los xij, eCPRI yog qhov nyiam tshaj plaws rau kev xa tawm 5G tshiab siv Open RAN lossis centralized / huab RAN architectures.
Kuv puas tuaj yeem hloov CPRI cable nrog tus qauv LC fiber ntau thaj qaum?
Hauv qee qhov chaw sab hauv, luv - nyob deb li cas, tus qauv LC duplex thaj qaum yuav ua haujlwm rau lub cev. Txawm li cas los xij, rau kev khiav tawm sab nraum zoov, FTTA xa tawm, lossis ib puag ncig uas xav tau kev tsim kho rugged, lub hom phiaj - tsim los ua ke nrog lub tsho tsim nyog, cov khoom sib txuas, thiab kev sim yog tsim nyog.
Dab tsi yog hom connector muaj nyob rau hauv CPRI cable sib dhos?
LC duplex yog qhov feem ntau txuas rau CPRI txuas. Kev teeb tsa sab nraum zoov kuj tseem tuaj yeem siv cov ntaub ntawv sib txuas tsis muaj dej xws li ODVA, FullAXS, lossis PDLC, nyob ntawm cov khoom muag thiab chaw xa khoom. Kev tshuaj xyuas muajfiber ntau connector homkom paub meej.
Dab tsi yog qhov txawv ntawm CPRI cable thiab CPRI module?
CPRI cable yog fiber ntau optic sib dhos txuas ob daim ntawm cov khoom siv. CPRI module (feem ntau yog SFP lossis SFP +transceiver) yog qhov kho qhov muag -rau- hluav taws xob converter ntsaws rau hauv cov khoom siv chaw nres nkoj. Ob leeg yuav tsum tau sib xws - lub module txiav txim siab hom fiber ntau thiab wavelength, thaum lub cable muab lub cev txuas.
Xaus
CPRI cable yog nkag siab zoo tshaj plaws raws li kev sib txuas ntawm fiber ntau optic uas txhawb nqa kev sib txuas ntawm lub hauv ntej thiab cov khoom siv xov tooj cua hauv xov tooj ntawm tes. Kev xaiv qhov kev sib dhos zoo yuav tsum sib piv cov fiber ntau, hom ntawv txuas, thiab kev ntsuas ib puag ncig rau koj cov cuab yeej tshwj xeeb, txuas qhov nrug, thiab kev teeb tsa. Rau cov haujlwm tshiab, xav txog seb koj lub tsev puas yog CPRI-raws li lossis hloov mus rau eCPRI, thiab npaj koj cov cabling raws li.
Yog tias koj xav tau kev cai CPRI cable sib dhos rau FTTA, ntauwd, lossis qhov chaw nres tsheb hauv paus,tiv tauj peb pab pawg engineeringrau specification xyuas thiab hais lus txhawb nqa.
