1 Kev Taw Qhia
FTTX yog ib txoj hauv kev nkag mus rau kev sib tham. Hauv kev nkag mus rau network, optical fiber ntau yog siv los ze rau cov neeg siv. Qhov chaw kis tau tus mob ntawm optical fiber ntau loj. Raws li txoj kev sib kis tau zoo, nws kuj muaj kev ntseeg siab heev; raws li lub ntsiab kis nruab nrab, kev siv fiber ntau optical tau dhau los ua qhov kev sib txuas ruaj khov Ib qho kev taw qhia tshiab rau kev nkag. Nrog rau kev txhim kho thev naus laus zis thiab daim ntawv thov ntawm kev lag luam nplai, tus nqi ntawm FTTX kuj tseem txo qis, uas yuav pab kom nrov ntawm FTTX thev naus laus zis thiab ntxiv rau hauv peb lub neej niaj hnub. Hauv kev ua si triple, daim ntawv thov ntawm FTTX thev naus laus zis tau ua lub luag haujlwm tseem ceeb heev.
2 Technical Development ntawm FTTX
Hauv FTTX technology, passive optical network technology yog qhov tseem ceeb tshaj plaws. Nws siv cov fiber ntau optical ua qhov nruab nrab thiab tuaj yeem sib cais kev sib kis tau zoo thoob plaws hauv tag nrho cov txheej txheem. Tshwj xeeb tshaj yog nyob rau hauv cov nqe lus ntawm kev tswj kev khiav hauj lwm thiab txij nkawm, kev muab kev pab cuam, thiab lwm yam, nws qhov zoo yog qhov tseem ceeb, ua rau nws piv rau lwm yam technologies. tseem ceeb tshaj qhov zoo. Lub passive optical network system yuav muab faib ua peb ntu, xws li kho qhov muag kab davhlau ya nyob twg, kho qhov muag fiber faib network thiab kho qhov muag network unit. Ntawm no, qhov kho qhov muag kab davhlau ya nyob twg yog qhov tseem ceeb ntawm lub kaw lus, uas muab cov kev sib txuas ceev ceev rau kev nkag mus rau lub network thiab cov tub ntxhais network, thiab tseem tuaj yeem siv los ua ib qho point-to-multipoint network interface los muab cov ntaub ntawv rau lwm qhov kho qhov muag. network units los ntawm kev tshaj tawm. Chav tsev kho qhov muag feem ntau nkag mus rau cov ntaub ntawv thiab cov kev pabcuam suab thiab ua lub luag haujlwm ntawm tus neeg siv kawg. Optical fiber faib network yog optical fiber tis network, lub ntsiab tivthaiv yog passive optical fiber splitter, xws li ib tug optical fiber kis tau tus mob broadband yuav muab faib los ntawm ntau optical network units, ntawm chav kawm, lub premise yog hais tias qhov broadband interface yog passive optical network. .
Lub tswv yim ntawm passive optical network technology yog thawj zaug npaj rau xyoo 1990. Tom qab kev txhim kho thiab kev hloov pauv, nws tau ua tiav tsis tu ncua thiab maj mam txhim kho, tsim ob tus qauv, uas yog tus qauv EPON thiab tus qauv GPON. EPON yog raws li Ethernet. Peb txhua tus paub tias passive optical network muaj qhov tshwj xeeb network qauv kom zoo dua, thiab Ethernet muaj tus nqi qis, thiab EPON muaj qhov zoo ntawm ob qho tib si. Lub ntsiab technology ntawm GPON yog ATM encapsulation technology. Nyob rau hauv cov ntaub ntawv no, GEP84 encapsulation raug xaiv, uas muaj cov khoom zoo dua thiab qhia tau hais tias muaj kev txhawb nqa zoo rau cov kev pabcuam TDM.
Network thev naus laus zis tau txhim kho tas li, thiab kev sib tw ntawm cov thev naus laus zis tshiab tau dhau los ua qhov hnyav dua. Raws li cov thev naus laus zis tseem ceeb tshaj plaws hauv kev siv tshuab kho qhov muag tsis pom kev, EPON thiab GPON yeej ib txwm muab piv rau ib leeg. Ob lub technologies no muaj lawv tus kheej zoo. GPON muaj cov txiaj ntsig tseem ceeb hauv cov ntsiab lus ntawm uplink thiab downlink ceev, optical splitting ratio, thiab network tswj kev ua haujlwm. Piv nrog EPON, GPON tau tsim cov qauv tom qab, yog li nws muaj ntau dua; piv nrog GPON, EPON kev lag luam saw Nws yuav tsum tau paub tab thiab zoo meej, thiab tus nqi qis dua. Tsis tas li ntawd, EPON tus qauv yog kev so ntau dua li yav tas los, yog li cov tuam txhab tsim khoom muaj ntau chav ua si hauv kev tsim khoom.
3 Kev siv tswv yim ntawm FTTX
Kaum xyoo dhau los, cov neeg ua haujlwm siv XPON thev naus laus zis los sim FTTX. Thaum kawg ntawm cov txheej txheem no, kev ua lag luam cog qoob loo thiab kev npaj siv thev naus laus zis tau pib ib theem tshiab. Txij thaum ntawd los, FTTX raws li XPON thev naus laus zis tau pib ua lag luam. Ib theem tshiab ntawm scale daim ntawv thov. Tam sim no, chav tsev kho qhov muag tau muab faib ua peb hom, uas yog ib qho chaw nres nkoj kho qhov muag, ntau qhov chaw nres nkoj kho qhov muag thiab kev sib koom ua ke kho qhov muag network. Raws li txoj haujlwm sib txawv ntawm chav tsev kho qhov muag hauv qhov kev nkag mus rau qhov muag pom kev network, muaj peb hom nyob rau hauv tag nrho, xws li fiber-rau-lub tsev, fiber-rau-lub tsev, thiab fiber-rau-txoj kev. , tag nrho hu ua FTTX.
3.1 TSI
Chav tsev kho qhov muag feem ntau yog ntsia rau hauv tus neeg siv lub tsev nyob rau hauv ib qho chaw nres nkoj, thiab cov kab hluav taws xob kho qhov muag ntawm lub chaw ua haujlwm hauv nruab nrab yog nruab rau hauv chav sib txuas lus, thiab cov khoom siv sib kis tau siv los ua tus nqa khoom los txuas thiab xa cov ntaub ntawv cuam tshuam ntawm lub suab thiab cov ntaub ntawv network. Kev sib txuas ntawm cov kab hluav taws xob kho qhov muag thiab cov kab hluav taws xob passive optic splitter feem ntau yog ua los ntawm lub cev fiber ntau optic cable. Los ntawm passive fiber optic splitter mus rau tus neeg siv lub tsev, ib tug tawv cable nrog ib tug me me ntawm cov cores yog muab tso rau, thiab los ntawm tus neeg siv lub optical network unit. Tsib hom kab thiab twisted khub, thiaj li ua kom yooj yim rau kev nkag mus rau broadband thiab kev pabcuam suab.
3.2 Fiber rau lub tsev
Hom kev kho qhov muag network no yog ntau qhov chaw nres nkoj, feem ntau muab tso rau hauv lub tsev, thiab feem ntau muaj kev ua haujlwm ntawm kev sib txuas ntawm passive optical network thiab thaj chaw hauv cheeb tsam. Feem ntau ntawm cov splitters yog muab tso rau hauv lub module chaw ua hauj lwm chav tsev computer, thiab ib co yog nyob rau hauv lub fiber optic faib khoom ntawm lub zej zog computer chav tsev. Tus naj npawb ntawm ntau qhov chaw nres nkoj optical network yog xam los ntawm tag nrho cov neeg siv ib chav nyob hauv lub tsev nyob. Nyob rau lub sijhawm no, nws yog feem ntau Cov chav tsev kho qhov muag yuav muab tso rau hauv cov ncej ntsug, thiab lub thawv fais fab kuj suav nrog, kom cov khoom siv hluav taws xob tuaj yeem nkag tau yooj yim. Chav tsev kho qhov muag feem ntau yog siv Qeb 5 kab rau cov tswv tsev hauv tsev, thiab lub vaj huam sib luag ua cim tau nruab rau ntawm phab ntsa ntawm lub tsev txhawm rau txuas lub khoos phis tawj mus rau Qib 5 kab, thiab txuas rau optical modem thiab twisted khub interface.
3.3 Fiber rau qhov curb
Nws cov kab hluav taws xob kho qhov muag tau teeb tsa hauv chav tsev computer ntawm lub chaw ua haujlwm hauv nruab nrab, thiab cov khoom siv hluav taws xob tsis zoo yog nruab rau hauv qhov chaw ua haujlwm. Hom kev sib txuas lus no nrog kev ua haujlwm siab, cov cuab yeej siv no feem ntau siv rau kev hloov pauv hauv network thiab hloov kho dua tshiab hauv thaj chaw uas cov neeg siv tau tawg, thiab tuaj yeem ua kom tag nrho cov kev siv ntawm lub network muaj cov yam ntxwv ntawm tus nqi qis thiab kev txhim kho sai ntawm cov neeg siv kev xav. . Peb daim ntawv ntawm XPON muaj lawv tus yam ntxwv. Qhov ceev ntawm fiber-rau-lub tsev yog ceev heev thiab kev saib xyuas yog yooj yim heev. Txawm li cas los xij, nws tseem kim heev rau nruab ib lub khoos phis tawj kho qhov muag hauv txhua lub tsev. Nrog kev poob qis ntawm tus nqi ntawm ib qho chaw nres nkoj kho qhov muag W network units, tus nqi ntawm cov khoom siv kho qhov muag network thiab kho qhov muag cables, fiber-rau-lub tsev tau dhau los ua cov ntawv thov tseem ceeb tshaj plaws.
4 Epilogue
Los ntawm kev txhim kho txuas ntxiv ntawm FTTX thev naus laus zis, peb tuaj yeem pom nws txoj kev vam meej hauv lub neej tiag tiag. Cov thev naus laus zis no tseem yuav cuam tshuam rau kev txhim kho cov thev naus laus zis network thiab kev nthuav dav kev lag luam tshiab yav tom ntej; Cov kev xav tau hloov pauv ntawm cov neeg siv kuj txhawb nqa qhov kev hloov pauv tas mus li ntawm FTTX thev naus laus zis thiab kev txhim kho, yav tom ntej FTTX thev naus laus zis yuav ua tiav ntau dua, hloov tau yooj yim, siv tau ntau dua, thiab ruaj khov dua hauv kev ua haujlwm.
