I-OXC (optical cross-connect) inguqulo ethuthukisiwe ye-ROADM (Reconfigurable Optical Add-Drop Multiplexer).
Njengesici esiyinhloko sokushintsha kwamanethiwekhi okukhanya, ukusabalala kanye nokusebenza kahle kwezindleko kwama-optical cross-connect (OXCs) akugcini nje ngokunquma ukuguquguquka kwe-topology yenethiwekhi kodwa futhi kuthinta ngqo izindleko zokwakha nokusebenza kanye nokugcinwa kwamanethiwekhi okukhanya amakhulu. Izinhlobo ezahlukene zama-OXC zibonisa umehluko omkhulu ekwakhiweni kwezakhiwo kanye nokusetshenziswa kokusebenza.
Isithombe esingezansi sibonisa ukwakheka kwendabuko kwe-CDC-OXC (Colorless Directionless Contetionless Optical Cross-Connect), okusebenzisa ukushintsha kwe-wavelength selective switches (WSSs). Ohlangothini lomugqa, ama-WSS angu-1 × N kanye nama-N × 1 asebenza njengamamojula okungena/okuphuma, kuyilapho ama-WSS angu-M × K ohlangothini lokwengeza/lokudonsa ephatha ukwengeza nokwehla kwama-wavelength. Lawa mamojula axhumene ngemicu ye-optical ngaphakathi kwe-backplane ye-OXC.
Umfanekiso: Ukwakhiwa Kwezakhiwo Kwendabuko Kwe-CDC-OXC
Lokhu kungafinyelelwa futhi ngokuguqula i-backplane ibe yinethiwekhi ye-Spanke, okuholela ekwakhiweni kwethu kwe-Spanke-OXC.
Umfanekiso: Ukwakhiwa Kwezakhiwo zeSpanke-OXC
Isithombe esingenhla sibonisa ukuthi ohlangothini lomugqa, i-OXC ihlotshaniswa nezinhlobo ezimbili zamachweba: amachweba aqondisayo kanye namachweba e-fiber. Ichweba ngalinye eliqondisayo lihambisana nesiqondiso sendawo se-OXC ku-topology yenethiwekhi, kuyilapho ichweba ngalinye le-fiber limelela umbhangqwana wezintambo eziqondisayo ngaphakathi kwechweba eliqondisayo. Ichweba eliqondisayo liqukethe amachweba amaningi ezintambo ezimbili (okungukuthi, amachweba amaningi ezintambo).
Ngenkathi i-OXC esekelwe eSpanke ifinyelela ekushintsheni okungavimbeli ngokuphelele ngomklamo we-backplane oxhumene ngokuphelele, imikhawulo yayo iba nkulu njengoba ithrafikhi yenethiwekhi ikhuphuka. Umkhawulo wokubalwa kwe-port we-commercial wavelength selective switches (WSSs) (isibonelo, inani eliphezulu lamanje elisekelwayo yi-1×48 ports, njenge-Finisar's FlexGrid Twin 1×48) kusho ukuthi ukwandisa ubukhulu be-OXC kudinga ukushintsha yonke ihadiwe, okubiza kakhulu futhi kuvimbela ukusetshenziswa kabusha kwemishini ekhona.
Ngisho noma inomklamo we-OXC osezingeni eliphezulu osekelwe kumanethiwekhi e-Clos, isathembele kuma-M×N WSS abizayo, okwenza kube nzima ukuhlangabezana nezidingo zokuthuthukisa eziqhubekayo.
Ukuze babhekane nale nselele, abacwaningi baphakamise ukwakheka okusha okuhlanganisiwe: i-HMWC-OXC (i-Hybrid MEMS kanye ne-WSS Clos Network). Ngokuhlanganisa izinhlelo ze-microelectromechanical (i-MEMS) kanye ne-WSS, lokhu kwakheka kugcina ukusebenza okucishe kungavimbeli ngenkathi kusekela amakhono "okukhokha njengoba ukhula", okunikeza indlela yokuthuthukisa engabizi kakhulu yabaqhubi benethiwekhi ye-optical.
Umklamo oyinhloko we-HMWC-OXC usesimeni sayo senethiwekhi ye-Clos enezingqimba ezintathu.
Umfanekiso: Ukwakhiwa kwe-Spanke-OXC Okusekelwe Kumanethiwekhi e-HMWC
Amaswishi e-optical e-MEMS anobukhulu obuphezulu afakwa ezingqimbeni zokufaka nezokukhipha, njengesikali esingu-512×512 esisekelwa ubuchwepheshe bamanje, ukuze kwakhiwe ichibi lembobo elikhulu. Ingqimba ephakathi iqukethe amamojula amaningi amancane e-Spanke-OXC, axhunywe nge-“T-ports” ukuze kuncishiswe ukuminyana kwangaphakathi.
Esigabeni sokuqala, opharetha bangakha ingqalasizinda ngokusekelwe ku-Spanke-OXC ekhona (isb., isikali esingu-4×4), bamane basebenzise izinkinobho ze-MEMS (isb., 32×32) ezingqimbeni zokufaka nezokukhipha, ngenkathi begcina imojuli eyodwa ye-Spanke-OXC engqimbeni ephakathi (kulokhu, inani lama-T-port liyi-zero). Njengoba izidingo zomthamo wenethiwekhi zanda, amamojuli amasha e-Spanke-OXC afakwa kancane kancane engqimbeni ephakathi, futhi ama-T-port ahlelwe ukuxhuma amamojuli.
Isibonelo, lapho kwandiswe inani lamamojula aphakathi nendawo kusuka kwelinye kuya kwamabili, inani lama-T-port lisethwa kwelinye, okwandisa ubukhulu obuphelele kusuka kwabane kuya kwayisithupha.
Umfanekiso: Isibonelo se-HMWC-OXC
Le nqubo ilandela umkhawulo wepharamitha M > N × (S − T), lapho:
I-M iyinombolo yamachweba e-MEMS,
I-N iyinombolo yamamojula aphakathi nendawo,
I-S iyinombolo yamachweba ku-Spanke-OXC eyodwa, futhi
I-T iyinombolo yamachweba axhunyiwe.
Ngokulungisa ngokuguquguqukayo la mapharamitha, i-HMWC-OXC ingasekela ukwanda kancane kancane kusuka esikalini sokuqala kuya kubukhulu obuqondiwe (isb., 64×64) ngaphandle kokushintsha zonke izinsiza zehadiwe ngesikhathi esisodwa.
Ukuze kuqinisekiswe ukusebenza kwangempela kwalolu hlaka, ithimba locwaningo lenze izivivinyo zokulingisa ngokusekelwe ezicelweni zendlela yokukhanya enamandla.
Umfanekiso: Ukuvimba Ukusebenza Kwenethiwekhi ye-HMWC
Ukulingisa kusebenzisa imodeli yethrafikhi ye-Erlang, uma kuthathwa ukuthi izicelo zesevisi zilandela ukusatshalaliswa kwe-Poisson kanye nezikhathi zokubamba isevisi zilandela ukusatshalaliswa okungekuhle kwe-exponential. Umthwalo wethrafikhi ophelele usethelwe ku-3100 Erlangs. Ubukhulu be-OXC obuqondiwe bungu-64×64, kanti isikali se-MEMS sengqimba yokufaka neyokukhipha naso singu-64×64. Ukulungiselelwa kwemodyuli ye-Spanke-OXC yengqimba ephakathi kufaka phakathi imininingwane engu-32×32 noma engu-48×48. Inani lama-T-port lisukela ku-0 kuya ku-16 kuye ngezidingo zesimo.
Imiphumela ikhombisa ukuthi, esimweni esinobukhulu obuqondisiwe buka-D = 4, amathuba okuvimba e-HMWC-OXC asondele kulawo esisekelo sendabuko se-Spanke-OXC (S(64,4)). Isibonelo, kusetshenziswa ukucushwa kwe-v(64,2,32,0,4), amathuba okuvimba anda cishe ngo-5% kuphela ngaphansi komthwalo omaphakathi. Lapho ubukhulu obuqondisiwe bukhuphuka bufika ku-D = 8, amathuba okuvimba ayanda ngenxa "yomphumela wesiqu" kanye nokwehla kobude befayibha ohlangothini ngalunye. Kodwa-ke, le nkinga ingancishiswa ngempumelelo ngokwandisa inani lama-T-ports (isibonelo, ukucushwa kwe-v(64,2,48,16,8).
Okuphawulekayo ukuthi nakuba ukungezwa kwamamojula aphakathi nendawo kungabangela ukuvinjelwa kwangaphakathi ngenxa yempikiswano ye-T-port, ukwakheka okuphelele kusengakwazi ukufeza ukusebenza okuthuthukisiwe ngokucushwa okufanele.
Ukuhlaziywa kwezindleko kugcizelela kakhulu izinzuzo ze-HMWC-OXC, njengoba kuboniswe esithombeni esingezansi.
Umfanekiso: Ukuvimba Amathuba kanye Nezindleko Zezakhiwo Ezihlukene ze-OXC
Ezimweni ezinobuningi obukhulu obunama-wavelengths/fiber angu-80, i-HMWC-OXC (v(64,2,44,12,64)) inganciphisa izindleko ngo-40% uma kuqhathaniswa ne-Spanke-OXC yendabuko. Ezimweni ezinobude obuphansi (isb., ama-wavelengths/fiber angu-50), inzuzo yezindleko ibaluleke kakhulu ngenxa yenani elincishisiwe lama-T-port adingekayo (isb., v(64,2,36,4,64)).
Le nzuzo yezomnotho ivela ekuhlanganisweni kobuningi obukhulu be-port switch ye-MEMS kanye nesu lokunwetshwa kwe-modular, elingagcini nje ngokugwema izindleko zokufakwa esikhundleni kwe-WSS enkulu kodwa futhi linciphisa izindleko ezengeziwe ngokusebenzisa kabusha amamojula akhona e-Spanke-OXC. Imiphumela yokulingisa ikhombisa nokuthi ngokulungisa inani lamamojula aphakathi nendawo kanye nesilinganiso sama-T-ports, i-HMWC-OXC ingalinganisa ukusebenza kanye nezindleko ngendlela eguquguqukayo ngaphansi komthamo ohlukile we-wavelength kanye nokucushwa kwesiqondiso, inikeze opharetha amathuba okwenza ngcono ngezindlela eziningi.
Ucwaningo lwesikhathi esizayo lungaqhubeka nokuhlola ama-algorithms okwabiwa kwe-T-port ashukumisayo ukuze kuthuthukiswe ukusetshenziswa kwezinsiza zangaphakathi. Ngaphezu kwalokho, ngentuthuko ezinqubweni zokukhiqiza ze-MEMS, ukuhlanganiswa kwezishintshi eziphezulu kuzothuthukisa kakhulu ukwakheka kwalolu hlobo. Kwabasebenzi benethiwekhi ye-optical, lolu hlobo lokwakheka lufaneleka kakhulu ezimweni ezinokukhula kwethrafikhi okungaqinisekile, okuhlinzeka ngesisombululo sobuchwepheshe esisebenzayo sokwakha inethiwekhi yomgogodla ye-optical eqinile futhi enwebekayo.
Isikhathi sokuthunyelwe: Agasti-21-2025