I-DWDM kanye ne-OTN yizinhlelo ezimbili zobuchwepheshe ezakhiwe ubuchwepheshe bokudlulisa i-wavelength division transmission eminyakeni yamuva: I-DWDM ingathathwa njenge-PDH yangaphambilini (i-point-to-point transmission), futhi izinsizakalo ze-inthanethi nezingaxhunyiwe ku-inthanethi ziqedwa ku-ODF ngokusebenzisa ama-hard jumpers;I-OTN ifana ne-SDH (izinhlobo ezahlukahlukene Zenethiwekhi), nomsebenzi wokuxhumanisa (noma ngabe kuwukuxhumanisa okuphambanayo kwesendlalelo sikagesi noma ungqimba olubonakalayo).
Ngokusheshisa okuqhubekayo kwenqubo YAWO YONKE i-IP, okwamanje, kungakhathaliseki ukuthi uyini umgogodla kazwelonke, umgogodla wesifundazwe noma uhlelo lwenethiwekhi yendawo ye-WDM, i-OTN iyona ehamba phambili lapho kukhethwa imishini esigabeni sokuqala sokwakhiwa kwenethiwekhi.Imishini ye-OTN ishintshile kancane kancane imishini ye-DWDM ngezinzuzo zayo eziyingqayizivele (Efana nemishini ye-SDH ethatha indawo ye-PDH).Njengobuchwepheshe obusha kanye nefomu lomkhiqizo omusha, i-OTN isiphenduke into egxile embonini yamanje.Lesi sihloko sizohlaziya futhi siqhathanise i-DWDM, imishini ye-OTN nobuchwepheshe.
1 Imiqondo eyisisekelo ye-DWDM ne-OTN
Ngokushintshwa kwezidingo zesevisi kanye nobumbudumbudu, kuyadingeka ukuphindaphinda izinsizakalo zembudumbudu enkulu ngokusebenzisa imicu yokubona (i-fiber eyodwa noma i-dual-fiber) bese iwahlukanisa abe ubude begagasi obuhlukene ukuze kudluliselwe ibanga elide.Ubuchwepheshe be-wavelength division multiplexing buvela njengoba izikhathi zidinga.
I-DWDM i-wavelength division multiplexing (i-Wavelength Division Multiplexing), ephindaphinda amasignali okubona amaza ahlukene abe yifayibha efanayo ukuze idluliselwe.Ubuchwepheshe be-WDM wubuchwepheshe bendabuko obuvuthwe kakhulu bokuhlukaniswa kwamaza iminyaka engaphezu kweshumi.Ingahlukaniswa ngezici ezimbili: i-sparse wavelength division multiplexing (CWDM), ene-wavelength interval enkulu (20nm);i-dense wavelength division multiplexing (DWDM), enezikhawu ezincane ze-wavelength (ngaphansi noma elilingana no-0.8nm).Ngenxa yebanga elifushane lokudlulisela le-CWDM, inani elikhulu lamadivayisi e-DWDM asetshenziswa kumanethiwekhi akhona okudlulisela ama-opharetha ahlukahlukene.
Uhlelo oluvulekile lwe-DWDM luqukethe lezi zingxenye ezilandelayo: I-OTM iqedela ukulayishwa nokuthulula isevisi esiteshini somugqa wokukhanya, i-OA iqedela ukucutshungulwa okuhlanzekile kwe-optical relay amplification yesiginali ephindwe kaningi yesiteshi sokukhulisa umugqa wokukhanya, futhi i-OTU iqeda okungajwayelekile. ukukhanya kwesignali ye-wavelength ukuhlangabezana nomsebenzi we-G .694.1(2) wokuguqula i-wavelength yokukhanya kwesignali ye-wavelength evamile, i-OMU/ODU: iqedela ukuphindaphinda/ukwenza ukuphindaphindeka kwe-G.694.1(2) ukukhanya kwesignali ye-wavelength egxilile, i-OBA (isikhulisi samandla) siyathuthuka amandla esignali ye-optical ehlanganisiwe ngokukhula, ngaleyo ndlela kukhuliswe amandla okukhanya okukhiphayo we-wavelength ngayinye, futhi i-OPA (pre-amplification) ithuthukisa ukuzwela kokwamukela kobude begagasi ngalinye ngokwandisa amandla okubona wesiginali ephindaphindwayo yokufaka.
I-OTN iyi-Optical Transport Network (Optical Transport Network), eyaziwa nangokuthi i-OTH (Optical Transport Hierarchy) e-ITU-T.Yakhiwe ngesisekelo sokuhlukaniswa kwamagagasi endabuko futhi yahlanganisa izinzuzo ze-DWDM ne-SDH.Ihlanganisa izinzuzo zesizinda se-optical kanye nokucutshungulwa kwesizinda sikagesi, inikeza umthamo omkhulu wokudlulisa, ukuxhumana okusobala ngokuphelele kwe-wavelength/sub-wavelength kanye nokuvikelwa kwezinga lenkampani yenethiwekhi, futhi kuwubuchwepheshe obuhle kakhulu bokudlulisa izinsiza zezinhlayiya ezinkulu ze-broadband.Eminyakeni emihlanu edlule, opharetha basebenzise imishini ye-OTN ngezinga elikhulu kumanethiwekhi ahlukahlukene okudlulisela.
2 Ukuqhathaniswa kwezici zobuchwepheshe ze-DWDM ne-OTN
Nakuba uhlelo lwe-DWDM luthuthukisa kakhulu ukusebenza kahle kokudluliselwa kwezintambo ze-optical futhi lusekela ukudluliswa kwezinsizakalo ezinkulu ze-granularity, ngenxa yokulinganiselwa kobuchwepheshe be-wavelength division, ubude be-wavelength bulungiswa ngendlela ye-point-to-point futhi ayikwazi ukulungiswa ngamandla.Izinga lokusetshenziswa kwensiza aliphezulu, futhi ukuguquguquka kokulungiswa kwesevisi akwanele.Ukuhamba kwebhizinisi kushintshile, futhi kuyinkimbinkimbi kakhulu ukulungisa.Ukuhlela phakathi kwamasevisi e-DWDM kuwukuhlela okungokoqobo ku-ODF.Abaphathi benethiwekhi baqapha kuphela ukusebenza kwesendlalelo se-optical (ama-byte okuphatha inethiwekhi ambalwa kanye nolwazi lokuphatha inethiwekhi lulula), futhi kunezindlela ezimbalwa zokuxazulula izinkinga nobunzima bokulungisa okuphezulu.
I-OTN izuza njengefa umsebenzi wokudlulisela umthamo omkhulu we-DWDM futhi inamandla okuhlela ahlangene e-optoelectronic nekhono lokuvikela.Ngokusungulwa kobuchwepheshe be-ROADM, ubuchwepheshe be-OTH, i-G.709 encapsulation kanye nendiza yokulawula, ixazulula inkinga yamanethiwekhi endabuko e-WDM ngaphandle kwamakhono okuhlela isevisi ye-wavelength/sub-wavelength., Amandla okuxhumana abuthakathaka, amandla okuvikela abuthakathaka nezinye izinkinga.Isendlalelo sikagesi sisebenzisa ukuhlela okusekelwe kumaza angaphansi (okufana nezinhlayiya ze-GE, 2.5G, 10G, 40G, 100G), futhi ukuhlelwa kongqimba lwe-optical kusekelwe ikakhulukazi ku-10G, 40G noma i-100G yamaza, ngokusetshenziswa komkhawulokudonsa ophezulu;inamabhayithi amaningi angaphezulu, futhi i-OAM yayo Umsebenzi we/P unamandla kune-WDM.
Ngaphezu kwalokho, i-OTN ne-DWDM ingasetshenziswa ngokufanayo kungqimba olubonakalayo, umehluko wukuthi i-OTN inohlaka olungaphansi kongqimba lukagesi.Ngakho-ke, amanye amadivaysi e-DWDM kunethiwekhi ekhona yengezwa ngozimele abancane be-electronic cross-connect futhi athuthukele ku-OTN.
3 DWDM kanye ne-OTN yokuqhathanisa nenethiwekhi
Inethiwekhi exubile ye-OTN ne-DWDM izolahlekelwa izinzuzo ze-OTN (isakhiwo sefreyimu sihlukile kune-WDM evamile, futhi ukuxhumana kuzoba nomthelela).
Njengoba i-OTN optical cross-connect isetshenziswa ngokuyinhloko imojula ye-ROADM (elayishwe nge-WSS switch), kucatshangelwa intengo ephezulu ye-ROADM, i-OM/OD ne-OADM isetshenziselwa ukwakha inethiwekhi yendandatho kanye nenethiwekhi yamaketanga kunethiwekhi ye-OTN.
Kumanethiwekhi aboshwe ngamaketango (njengemigqa yetrunk yamabanga amade), izinzuzo ze-OTN azibonakali ngokugcwele ngenxa yamasevisi amaphakathi alinganiselwe nezindlela zokuvikela, kodwa kusenezinzuzo kwezinye izici (ukusebenza okuphezulu kwesiteshi kuholela ezindlekweni eziphansi kune i-WDM yendabuko), inethiwekhi yamanje ye-trunk isebenzisa i-DWDM ne-OTN ekuxhumaneni okuphakeme kakhulu.
Kunethiwekhi yendawo, njengoba izinsiza zidinga ukuxhunywa njalo, isakhiwo senethiwekhi sivame ukushintshwa futhi kuhlelwe, futhi indlela yokuvikela idinga ukushintshwa kalula, i-WDM evamile kufanele ingakwazi ukwenza kanjalo.Izinzuzo zokusebenzisa inethiwekhi ye-OTN ziyabonakala.
I-OTN inikeza ikhono lokuphatha ubude beza beza ku-fiber ngayinye, futhi i-OTN ingakwazi ukuzivumelanisa kangcono nokuthuthukiswa kwenethiwekhi kwesikhathi esizayo.
4 Ukuqhathaniswa kwe-DWDM ne-OTN Bearer Services
Isidingo se-OTN ye-crossover kagesi sivela ekuveleni kwezinga le-10G legagasi elilodwa.Uma isiteshi sifinyelela ku-10G, i-OTU yayo ingathwala i-4 * 2.5G noma i-8 kuya ku-9 GEs;I-DWDM isebenzisa indlela yokukhomba-kuya-iphuzu.Uma isidingo sesevisi sisincane, ukutshalwa kwezimali kwe-OTU kubonakala kuwukumosha.Kulokhu, kuyadingeka ukwethula umsebenzi wokuxhumanisa okuphambanayo ofana ne-SDH ku-DWDM, ukuze kuthuthukiswe umsebenzi wokuxhumanisa ugesi we-OTN.
I-OTN inamandla e-crossover kagesi, okungukuthi, amandla e-crossover esezingeni eliphansi ngesiteshi (kakhulu njenge-SDH).Ngesikhathi esifanayo, i-optical cross-connection kanye ne-cross-connection kagesi izimele komunye nomunye.Uma kukhona amandla okuxhuma okuphambanayo kodwa kungekho ukuxhuma okuphambanayo kukagesi, noma ukuxhuma okuphambanayo kagesi ngaphandle kokuxhuma okuphambanayo kokubona, kungabizwa nge-OTN.
Ngenxa yomehluko kumamodeli wokwakhiwa kwenethiwekhi (izindleko, inhlayiya yesevisi kanye nesiqondiso sokugeleza), indlela ye-crossover kagesi isetshenziswa kakhulu e-China, futhi indlela ye-optical crossover isetshenziswa kakhulu phesheya.
5 Isiphetho
Ngokuhlaziya okungenhla nokuqhathanisa, kungabonakala ukuthi i-OTN ne-DWDM zihluke kakhulu ngokobuchwepheshe kanye nokusetshenziswa.Ngokombono womthamo wokuxhumanisa, ubumbudumbudu besevisi kanye nokuguquguquka kwenethiwekhi, i-OTN inamandla kakhulu futhi ingahlangabezana kangcono nezidingo zokuxhumanisa inethiwekhi esikhathini esizayo.
Ngenxa yokucaca kokudluliswa kwesevisi yesistimu ye-OTN, amandla aqinile okulungisa amaphutha, amandla okuhlela ungqimba olubonakalayo/ugesi oluguquguqukayo, amandla okuphatha ukugcinwa kanye nobukhulu bomthamo wemishini (imishini engu-80*100G manje isithengiswa), amanethiwekhi ahlukahlukene okudlulisela. abe ongenakugwenywa.
Isikhathi sokuthumela: Oct-25-2022