Izimo zohlelo lokusebenza lwe-OTN

I-OTN kanye ne-PTN
Kufanele kushiwo ukuthi i-OTN ne-PTN ubuchwepheshe obuhlukene ngokuphelele, futhi ngokobuchwepheshe, kufanele kushiwo ukuthi akukho ukuxhumana.
I-OTN iyinethiwekhi yokuthutha ye-optical, ethuthukiswe kusukela kubuchwepheshe bendabuko bokuhlukanisa ubude be-wavelength. Inezela kakhulu umsebenzi wokushintsha kwe-optical ohlakaniphile. Ingenza i-optical crossover ngokucushwa kwedatha ngaphandle kwe-fiber jumpers yesandla. Ukugcinwa kanye nokuguquguquka kwenethiwekhi kwemishini ye-WDM kuthuthukiswa kakhulu. Ngesikhathi esifanayo, inethiwekhi entsha ye-OTN ishintsha kancane kancane ibe yi-bandwidth enkulu, izinhlayiya ezinkulu, kanye nokuvikelwa okuqinile.​

I-PTN iyinethiwekhi yokuthutha amaphakethe, okuwumkhiqizo wokuhlanganiswa kwenethiwekhi yokuthutha kanye nenethiwekhi yedatha. Iphrothokholi eyinhloko yi-TMPLS, enezendlalelo ze-IP ezimbalwa kanye namaphakethe aphezulu kakhulu kunamadivayisi enethiwekhi. Ingenza inethiwekhi yokukhala kanye nokuvikelwa. Iyinethiwekhi yedatha yekilasi labathwali (amanethiwekhi edatha endabuko awakwazi ukuhlangabezana nezidingo zekilasi labathwali). I-bandwidth yokudlulisela ye-PTN incane kuneye-OTN. Ngokuvamile, i-bandwidth yeqembu ephezulu ye-PTN ingu-10G, i-OTN eyodwa igagasi ingu-10G, indlela yeqembu ingafinyelela ku-400G-1600G, kanti ubuchwepheshe bamuva bungafinyelela igagasi elilodwa elingu-40G. Kungumgogodla wenethiwekhi yokudlulisela.

I-OTN kanye ne-SDH, i-WDM

I-OTN isekelwe kubuchwepheshe be-WDM, amandla okusebenza, ukugcinwa, ukuphathwa kanye nokwabiwa (i-OAM) anamandla e-SDH aqaliswa ngokusekelwe kumthamo wokudlulisa omkhulu kakhulu. I-OTN isebenzisa i-FEC ejwayelekile ehlanganisiwe, ecebile ngokugcinwa kanye nokuphathwa kwezindleko, futhi ifaneleka ekufinyeleleni isevisi enkulu yokulungisa amaphutha e-FEC, okuthuthukisa ukusebenza kwamaphutha amancane futhi kwandisa isikhathi sokudlulisa okubonakalayo.

Izimo zohlelo lokusebenza lwe-OTN

Inethiwekhi ye-optical ehlakaniphile esekelwe ku-OTN izohlinzeka ngesisombululo esifanele sokudluliswa kwezinsizakalo ze-broadband ezinkulu. Inethiwekhi yezokuthutha yakhiwe kakhulu yinethiwekhi yezokuthutha ye-trunk yezifundazwe, inethiwekhi yezokuthutha ye-trunk yezifundazwe, kanye nenethiwekhi yezokuthutha ye-metro (yendawo). Inethiwekhi yezokuthutha ye-metro (yendawo) ingahlukaniswa kabanzi ibe ungqimba oluyinhloko, ungqimba lokuhlanganisa kanye nongqimba lokufinyelela. Uma kuqhathaniswa ne-SDH, inzuzo enkulu yobuchwepheshe be-OTN ukuhlinzeka ngokuhlela kanye nokudluliswa kwe-bandwidth enkulu ye-granularity. Ngakho-ke, ukuthi ngabe kufanele kusetshenziswe ubuchwepheshe be-OTN ezingqimbeni ezahlukene zenethiwekhi kuncike kusayizi we-granularity ye-bandwidth yesevisi yokuhlela eyinhloko. Ngokusho kwesimo samanje senethiwekhi, izinhlayiya eziyinhloko zokuhlela ungqimba oluyinhloko lwenethiwekhi yokudlulisa i-trunk yezifundazwe, inethiwekhi yokudlulisa i-trunk yezifundazwe kanye nenethiwekhi yokudlulisa ye-metro (yendawo) ngokuvamile ziyi-Gb/s nangaphezulu. Ubuchwepheshe obungcono be-OTN obungakhiwa.
Ukuze kuhlanganiswe futhi kufinyeleleke ezingeni lenethiwekhi yezokuthutha yendawo (yendawo), lapho izinhlayiya zokuhlela eziyinhloko zifinyelela ezingeni le-Gb/s, ubuchwepheshe be-OTN bungakhiwa ngokukhethekayo.

1. Inethiwekhi yezokuthutha ye-trunk optical kazwelonke Ngenethiwekhi nezinsizakalo ezisekelwe ku-IP, ukuthuthukiswa kwezinsizakalo ezintsha kanye nokwanda okusheshayo kwabasebenzisi be-broadband, ithrafikhi ye-IP ku-trunk kazwelonke ikhuphuke kakhulu, futhi isidingo se-bandwidth sikhuphuke kakhulu unyaka nonyaka. I-trunk line kazwelonke ye-WDM ithwala izinsizakalo ze-PSTN/2G ezikude, izinsizakalo ze-NGN/3G ezikude, kanye nezinsizakalo ze-trunk line kazwelonke ye-inthanethi. Ngenxa yenani elikhulu lezinsizakalo zokuthwala, i-trunk line kazwelonke ye-WDM inesidingo esiphuthumayo sokuvikelwa kwezinsizakalo zokuthwala. Ngemva kokusebenzisa ubuchwepheshe be-OTN, imodi yokuthwala ye-trunk line kazwelonke ye-IP ngaphezu kwe-OTN ingafeza ukuvikelwa kwe-SNCP, ukuvikelwa kwenethiwekhi efana ne-SDH, ukuvikelwa kwenethiwekhi ye-MESH kanye nezinye izindlela zokuvikela inethiwekhi. Kuncishiswe kakhulu.

2. Inethiwekhi yezokuthutha ye-trunk optical yangaphakathi kwesifundazwe/yesifunda Ama-router e-backbone yangaphakathi kwesifundazwe/yesifunda aphatha izinsizakalo phakathi kwamahhovisi akude (i-NGN/3G/IPTV/umugqa okhethekile wamakhasimende amakhulu, njll.). Ngokwakhiwa kwenethiwekhi yokudlulisa i-trunk optical yesifundazwe/yesifunda ye-OTN, ukudluliswa okuphephile nokuthembekile kwezinsizakalo ze-GE/10GE, izinsizakalo ze-2.5G/10GPOS ezinkulu ze-granularity kungatholakala; amanethiwekhi endandatho, amanethiwekhi endandatho ayinkimbinkimbi, kanye namanethiwekhi e-MESH angakhiwa; inethiwekhi ingandiswa uma kudingeka; Qaphela ukuhlela okuphambene kanye nokulungiswa kwezinsizakalo ze-wavelength/sub-wavelength, futhi unikeze izinsizakalo zomugqa ezinikezelwe ku-wavelength/sub-wavelength kumakhasimende amakhulu; futhi uqaphele ukudluliswa kwezinye izinsizakalo ezifana ne-STM-1/4/16/64SDH, i-ATM, i-FE, i-DVB, i-HDTV, noma yikuphi, njll.

3. Inethiwekhi yezokuthutha ye-Metro/yendawo Engxenyeni eyinhloko yenethiwekhi ye-metro, inethiwekhi yezokuthutha ye-OTN optical ingafeza izinsizakalo ezinkulu ze-broadband phakathi kwe-router yokuhlanganisa i-metro, i-router yokuhlanganisa yenethiwekhi yendawo ye-C4 (yesifunda/yesifunda) kanye ne-router eyinhloko ye-metro. I-interface ephezulu ye-router ikakhulukazi i-GE/10GE, futhi ingaba yi-2.5G/10GPOS. Inethiwekhi yezokuthutha ye-OTN optical enkabeni ye-metro l