Nrog rau kev loj hlob ntawm cov kev pabcuam kev sib txuas lus ntawm tes thiab kev pabcuam broadband, cov tsoos PTN thiabOTN networkcov qauv tab tom ntsib cov teeb meem loj. Cov tiam tshiab kis tau tus mob thev naus laus zis - POTN (Packet-Optical-Transport-Network) muaj cov ntawv thov dav dav. Tsab ntawv xov xwm no qhia txog qhov tsis txaus ntawm PTN tes hauj lwm thiab OTN tes hauj lwm nyob rau hauv ib txwm nyob hauv zos network hom, kawm txog qhov yuav tsum tau ntawm lub tiam tshiab kis tau tus mob technology POTN, thiab tham txog daim ntawv thov txoj kev thiab daim ntawv thov scenarios ntawm no technology.
Tshiab tiam kis tau tus mob technology POTN
Nrog kev loj hlob sai ntawm kev pabcuam kev lag luam puv ntoob, nws tau muaj kev cuam tshuam loj heev rau cov kev sib txuas lus tseem ceeb tam sim no thiab cov koom tes sib koom tes. Lub packetization evolution ntawm optical thauj tes hauj lwm yog ib qho tseem ceeb, thiab POTN tau tshwm sim raws li ib tug tshiab tiam ntawm tag nrho cov kev pab cuam kis tau tus mob thiab bearer technology.
Nyob rau hauv xyoo tas los no, kuv lub teb chaws peb tus tswv lag luam loj thiab cov tuam txhab lag luam hauv tsev thiab txawv teb chaws sawv cev los ntawm Cisco, ZTE, Huawei, thiab lwm yam kuj tau pib tshawb fawb ntawm POTN, sib tham txog daim ntawv thov thiab kev loj hlob zeem muag ntawm POTN hauv cov tswv lag luam, thiab nquag tsim POTN cov khoom thiab cov kev daws teeb meem. . , POTN kev lag luam saw yog maj mam loj hlob, thiab kev lag luam loj xa mus yuav pib.
1. Qhov tsis zoo ntawm cov kev sib txuas ib txwm muaj thiab qhov tsim nyog ntawm POTN
Nyob rau hauv xyoo tas los no, txoj kev ywj pheej sib koom ua ke ntawm cov tsoos PTN tes hauj lwm thiab OTN tes hauj lwm, uas feem ntau yog xa mus rau hauv lub cev kab thiab cov cheeb tsam hauv nroog, tau maj mam nthuav tawm lawv qhov tsis txaus. Ua ntej tshaj plaws, PTN tes hauj lwm thiab OTN tes hauj lwm uas tsom mus rau qib sib txawv network feem ntau muaj kev tsim kho siab thiab kev ua haujlwm thiab cov nqi kho mob vim yog cov neeg muag khoom sib txawv thiab cov sij hawm tsim kho sib txawv, thiab qhov nyuaj ntawm kev teem caij thiab kev tswj xyuas txuas ntxiv mus ntxiv. Tsis tas li ntawd, PTN tes hauj lwm tsis muaj peev xwm nqa tau cov kev pabcuam loj thiab cov kev pabcuam loj. Bandwidth, tus nqi qis, thiab muaj peev xwm kis tau tus mob mus ntev. OTN tes hauj lwm tsis muaj peev xwm tswj tau bandwidth hloov tau thiab L3 VPN ua haujlwm. Ob leeg muaj qhov tsis zoo hauv kev nqa khoom. Thaum kawg, kev sib cais ntawm PTN thiab OTN hloov cov qauv thiab hierarchy ntawm kev sib kis tus kabmob network. Nws yog qhov nyuaj thiab siv ntau qhov chaw hauv computer, cov khoom siv hluav taws xob thiab cov kav dej, uas tsis yog qhov tsim nyog rau kev tsim kho kom ruaj khov ntawm kev sib kis thiab cov neeg nqa khoom network.
Lub cim tshiab kev xa khoom siv thev naus laus zis POTN yog lub platform rau kev sib koom ua ke ntawm kev hloov pauv architecture, lub platform rau kev sib koom ua ke ntawm cov khoom siv kho qhov muag thiab pob khoom, thiab lub platform rau kev sib koom ua ke nqa thiab kev tswj hwm ntawm txhua qhov kev pabcuam. Nws tuaj yeem paub txog kev sib koom ua ke thiab hloov tau yooj yim thiab kev sib cuam tshuam ntawm cov txheej txheem kho qhov muag thiab pob ntawv txheej txheej. POTN yog nruab nrog universal board slots, uas tuaj yeem pab txhawb ntau yam kev pabcuam cuam tshuam thiab kab sib txuas, thiab tuaj yeem hloov kho OTN, SDH, pob ntawv cov ntaub ntawv thiab lwm yam kev pabcuam raws li kev xav tau. POTN tuaj yeem ua tiav cov haujlwm ntawm ob lossis ntau lub dav hlau, ua kom yooj yim rau qib network thiab qhov nyuaj; POTN tseem tuaj yeem paub txog kev nkag mus thiab kev sib kis mus ntev ntawm cov kev pabcuam loj-granularity xws li10 GE, 40 GE, thiab100 GE. Tsis tas li ntawd, POTN tuaj yeem txuag lub computer chav tsev thiab txo cov kev siv nyiaj hauv computer chav siv hluav taws xob, cov khoom siv kav dej, thiab lwm yam.
2. Daim ntawv thov txoj kev thiab daim ntawv thov scenarios ntawm POTN
Nyob rau hauv lub network uas twb muaj lawm, PTN thiab OTN tes hauj lwm yog tsuas yog siv nyob rau hauv lub caj qaum aggregation txheej. Raws li qhov kev thov bandwidth maj mam nce, muaj ob txoj hauv qab no los siv POTN network rau lub network uas twb muaj lawm:
1. Ntxiv DWDM interface rau cov khoom siv network PTN uas twb muaj lawm kom paub txog kev xa mus ntev thiab muaj peev xwm loj;
2. Raws li PTN pob ntawv hloov dav hlau, ntxiv ODUk hloov dav hlau kom paub txog cov kev pabcuam hloov tau yooj yim ntawm cov pob ntawv thiab ODUk raws. Los ntawm cov txheej txheem saum toj no, pob ntawv hloov PTN network hauv lub network uas twb muaj lawm tuaj yeem hloov kho kom zoo rau POTN network. Tsis tas li ntawd, cov neeg ua haujlwm tseem tuaj yeem xa ncaj qha POTN tes hauj lwm ntawm lubqaumaggregation txheej.
POTN daim ntawv thov scenarios tuaj yeem muab faib ua plaub pawg loj raws li qib network thiab kev lag luam.
Lub cev kab: Hauv qhov xwm txheej no, POTN tuaj yeem ua tiav cov sijhawm teem sijhawm thiab kev sib sau ua ke ntawm cov kev pabcuam me me thiab nruab nrab raws li L2 / L3 thiab qhov loj-bandwidth, loj-granularity, thiab kev sib kis mus ntev. Ntxiv rau qhov ua tau raws li cov kev xav tau ntawm cov tsoos pob tw OTN thiab pab pawg ua lag luam sib cuam tshuam xav tau, nws tseem tuaj yeem siv L3 VPN ua haujlwm rau cov kev pabcuam LTE.
Kev thauj mus los hauv Metro: Hauv qhov xwm txheej no, POTN tuaj yeem ua tau raws li lub sijhawm hloov pauv thiab sib sau ua ke ntawm ntau yam kev pabcuam me me thiab nruab nrab, thiab muaj cov haujlwm xws li L3VPN thiab Ethernet. Tsis tas li ntawd, POTN tuaj yeem ua rau muaj kev sib txuas ntawm sab-sab bandwidth los ntawm cov thev naus laus zis xws li PIC, uas tuaj yeem ua tau raws li qhov yuav tsum tau ua ntawm bandwidth ntawm lub hauv paus chaw nres tsheb rov qab cov kev pabcuam.
Tsev broadband: PON tes hauj lwm tau dav siv. Feem ntau OLT uplinks tseem siv GE interfaces, tab sis 10GE interface OLTs tau dhau los ua neeg nyiam. POTN tuaj yeem siv los sib sau ua ke OLT cov kev pabcuam hauv tsev broadband thiab ua haujlwm loj-bandwidth thiab tus nqi qis thiab kev teem sijhawm ntawm cov kev pabcuam no.
Pab pawg neeg siv khoom: Rau cov kev pabcuam sab hauv zoo tib yam, MPLS-TP boards tuaj yeem siv los nkag mus rau POTN network thiab xa mus los ntawm cov kav dej hloov tau yooj yim, uas tuaj yeem ua tau raws li qhov xav tau ntawm kev xa mus yooj yim thiab hloov tau yooj yim ntawm cov kev pabcuam. Rau cov kev pabcuam uas muaj txiaj ntsig zoo, CBR boards tuaj yeem siv los nkag mus rau POTN network thiab xa mus los ntawm cov kav dej nruj, kom ntseeg tau tias bandwidth loj, qis latency, thiab kev ruaj ntseg siab.
3. Cov lus xaus
Nrog rau kev loj hlob ntawm cov xov tooj ntawm LTE cov kev pabcuam thiab cov neeg siv khoom siv hauv tsev, cov qauv kev sib txuas ib txwm tau raug sim hnyav. Ib tiam tshiab ntawm kev sib kis technology, POTN, tau tshwm sim thiab tau maj mam lees paub thiab muaj nuj nqis los ntawm cov phooj ywg. POTN tuaj yeem ua kom yooj yim rau cov txheej txheem network thiab kev sib txuas sib txuas, thiab tuaj yeem paub txog kev xa mus ntev ntawm cov kev pabcuam loj-granularity, thiab muaj cov ntawv thov dav heev. POTN thev naus laus zis muaj qhov zoo tshaj plaws ntawm kev ywj pheej sib txuas hom ntawm pob ntawv sib kis network thiab OTN network hauv ib txwm muaj.kev sib txuas lus network. Nws tuaj yeem hloov kho tau yooj yim los ntawm lub network uas twb muaj lawm mus rau POTN network. Nws muaj kev nplua nuj daim ntawv thov scenarios thiab tuaj yeem ua tau raws li ntau yam kev xav tau ntawm lub network uas twb muaj lawm.
