I-OXC (optical cross-connect) yinguqulelo ephuculweyo ye-ROADM (Reconfigurable Optical Add-Drop Multiplexer).
Njengento ephambili yokutshintsha iinethiwekhi ze-optical, ukwandiswa kunye nokusebenza kakuhle kweendleko zee-optical cross-connectors (OXCs) azichazi kuphela ukuguquguquka kwee-topologies zenethiwekhi kodwa zikwachaphazela ngokuthe ngqo iindleko zokwakha kunye nokusebenza kunye nokugcinwa kweenethiwekhi ze-optical ezinkulu. Iindidi ezahlukeneyo ze-OXC zibonisa umahluko omkhulu kuyilo lwezakhiwo kunye nokusetyenziswa komsebenzi.
Umfanekiso ongezantsi ubonisa uyilo lwendabuko lwe-CDC-OXC (Colorless Directionless Contetionless Optical Cross-Connect), olusebenzisa iiswitshi zokukhetha ubude be-wavelength (ii-WSS). Kwicala lomgca, ii-1 × N kunye nee-N × 1 WSS zisebenza njengeemodyuli zokungena/zokuphuma, ngelixa ii-M × K WSS kwicala lokongeza/lokuwisa zilawula ukongezwa kunye nokuwa kwee-wavelengths. Ezi modyuli ziqhagamshelwe nge-optical fibers ngaphakathi kwe-backplane ye-OXC.
Umfanekiso: Uyilo lweNdalo lweCDC-OXC
Oku kunokufezekiswa ngokuguqula i-backplane ibe yinethiwekhi yeSpanke, nto leyo ekhokelela kuyilo lwethu lweSpanke-OXC.
Umfanekiso: Uyilo lweSpanke-OXC
Umfanekiso ongentla ubonisa ukuba kwicala lomgca, i-OXC inxulunyaniswa neentlobo ezimbini zeeports: iiports ezikhokelayo kunye neeports zefiber. Iport nganye ekhokelayo ihambelana nolwalathiso lwejografi lwe-OXC kwi-topology yenethiwekhi, ngelixa iport nganye yefiber imele isibini seefibers ezikhokelayo ngaphakathi kweport ekhokelayo. Iport ekhokelayo iqulethe ii-fibers ezininzi ezikhokelayo (oko kukuthi, iiports ezininzi zefiber).
Nangona i-OXC esekelwe kwiSpanke ifikelela ekutshintsheni okungavimbiyo ngoyilo lwe-backplane oludibeneyo ngokupheleleyo, imida yayo iba nkulu ngakumbi njengoko ithrafikhi yenethiwekhi isanda. Umda wokubala kwezibuko zeeswitshi zokukhetha ubude be-wavelength (ii-WSS) (umzekelo, ubuninzi bangoku obuxhaswayo zii-ports eziyi-1×48, ezifana ne-FlexGrid Twin 1×48 yeFinisar) kuthetha ukuba ukwandisa ubukhulu be-OXC kufuna ukutshintsha zonke izixhobo, nto leyo ebiza kakhulu kwaye ithintela ukusetyenziswa kwakhona kwezixhobo ezikhoyo.
Nangona inoyilo lwe-OXC oluphezulu olusekelwe kwiinethiwekhi zeClos, isaxhomekeke kwii-M×N WSS ezibizayo, nto leyo eyenza kube nzima ukuhlangabezana neemfuno zokuphucula ngokuthe ngcembe.
Ukujongana nalo mceli mngeni, abaphandi bacebise uyilo olutsha oluxutyiweyo: i-HMWC-OXC (i-Hybrid MEMS kunye ne-WSS Clos Network). Ngokudibanisa iinkqubo ze-microelectromechanical (i-MEMS) kunye ne-WSS, olu lwakhiwo lugcina ukusebenza okuphantse kungathinteli ngelixa luxhasa amandla "okuhlawula njengoko ukhula", okubonelela ngendlela yokuphucula engabizi kakhulu kubaqhubi benethiwekhi ye-optical.
Uyilo oluphambili lwe-HMWC-OXC lukwisakhiwo sayo senethiwekhi ye-Clos enamaleya amathathu.
Umfanekiso: Uyilo lweSpanke-OXC olusekwe kwiiNethiwekhi zeHMWC
Iiswitshi ze-optical ze-MEMS ezinobukhulu obuphezulu zifakwa kwiileya zokufaka kunye nezokukhupha, ezifana nesikali se-512×512 esixhaswa yitekhnoloji yangoku, ukwenza ichibi lezibuko elikhulu. Ileya ephakathi ineemodyuli ezininzi ezincinci ze-Spanke-OXC, ezidityaniswe nge-“T-ports” ukunciphisa ukuxinana kwangaphakathi.
Kwisigaba sokuqala, abaqhubi banokwakha iziseko ezisekelwe kwiSpanke-OXC ekhoyo (umz., isikali se-4×4), besebenzisa nje iiswitshi zeMEMS (umz., 32×32) kwiileya zokufaka kunye neziphumo, ngelixa begcina imodyuli enye yeSpanke-OXC kwileya ephakathi (kule meko, inani lee-T-ports liyi-zero). Njengoko iimfuno zomthamo wenethiwekhi zisanda, iimodyuli ezintsha zeSpanke-OXC zongezwa kancinci kancinci kwileya ephakathi, kwaye ii-T-ports zilungiselelwe ukuqhagamshela iimodyuli.
Umzekelo, xa kwandiswa inani leemodyuli zomaleko ophakathi ukusuka kwenye ukuya kwezimbini, inani lee-T-ports limiselwa kwenye, oko kwandisa ubukhulu bento yonke ukusuka kwezine ukuya kwezintandathu.
Umfanekiso: Umzekelo we-HMWC-OXC
Le nkqubo ilandela umqobo weparameter M > N × (S − T), apho:
U-M linani leeports ze-MEMS,
I-N linani leemodyuli zomaleko ophakathi,
I-S linani leezibuko kwi-Spanke-OXC enye, kwaye
U-T linani leeports ezidityanisiweyo.
Ngokulungisa ezi parameters ngokuguquguquka, i-HMWC-OXC inokuxhasa ukwandiswa kancinci kancinci ukusuka kwisikali sokuqala ukuya kumlinganiselo wethagethi (umz., 64×64) ngaphandle kokutshintsha zonke izixhobo zehardware ngaxeshanye.
Ukuqinisekisa ukusebenza kwale ndlela yokwakha, iqela lophando lenze uvavanyo lokulinganisa olusekelwe kwizicelo zendlela ye-dynamic optical.
Umfanekiso: Ukuthintela Ukusebenza kweNethiwekhi ye-HMWC
Olu vavanyo lusebenzisa imodeli yetrafikhi ye-Erlang, xa kuthathwa ukuba izicelo zenkonzo zilandela usasazo lwe-Poisson kwaye amaxesha okubamba kwenkonzo alandela usasazo olubi lwe-exponential. Umthwalo wetrafikhi iyonke umiselwe kwi-3100 Erlangs. Ubungakanani be-OXC ekujoliswe kuyo yi-64×64, kwaye isikali se-MEMS sokufaka kunye nesiphumo somaleko sikwayi-64×64. Uqwalaselo lwemodyuli ye-Spanke-OXC yomaleko ophakathi luquka iinkcukacha ze-32×32 okanye ze-48×48. Inani lee-T-ports liqala kwi-0 ukuya kwi-16 kuxhomekeke kwiimfuno zesimo.
Iziphumo zibonisa ukuba, kwimeko enomlinganiselo wecala ongo-D = 4, amathuba okuvalela e-HMWC-OXC asondele kulawo esiseko seSpanke-OXC sendabuko (S(64,4)). Umzekelo, usebenzisa uqwalaselo lwe-v(64,2,32,0,4), amathuba okuvalela ayanda nge-5% kuphela phantsi komthwalo ophakathi. Xa ubukhulu becala bunyuka ukuya kwi-D = 8, amathuba okuvalela ayanda ngenxa "yesiphumo sesiqu" kunye nokwehla kobude befayibha kwicala ngalinye. Nangona kunjalo, le ngxaki inokupheliswa ngempumelelo ngokunyusa inani lee-T-ports (umzekelo, uqwalaselo lwe-v(64,2,48,16,8).
Okuphawulekayo kukuba, nangona ukongezwa kweemodyuli eziphakathi kunokubangela ukuvimba kwangaphakathi ngenxa yengxabano ye-T-port, uyilo lulonke lusenokufezekisa ukusebenza okuphuculweyo ngokuseta okufanelekileyo.
Uhlalutyo lweendleko lugxininisa ngakumbi iingenelo ze-HMWC-OXC, njengoko kubonisiwe kumfanekiso ongezantsi.
Umfanekiso: Ukuthintela Amathuba kunye neendleko zezakhiwo ezahlukeneyo ze-OXC
Kwimiba enoxinano olukhulu ene-80 wavelengths/fiber, i-HMWC-OXC (v(64,2,44,12,64)) inokunciphisa iindleko nge-40% xa kuthelekiswa ne-Spanke-OXC yendabuko. Kwimiba enobude obuphantsi (umz., ii-50 wavelengths/fiber), inzuzo yeendleko ibaluleke ngakumbi ngenxa yokuncipha kwenani lee-T-ports ezifunekayo (umz., v(64,2,36,4,64)).
Le nzuzo yezoqoqosho ivela ekudibaneni koxinano olukhulu lwee-port switches ze-MEMS kunye nesicwangciso sokwandisa iimodyuli, esingagcini nje ngokuthintela iindleko zokutshintshwa kwe-WSS enkulu kodwa sinciphisa neendleko ezongezelelweyo ngokusebenzisa kwakhona iimodyuli zeSpanke-OXC ezikhoyo. Iziphumo zokulinganisa zibonisa nokuba ngokulungelelanisa inani leemodyuli eziphakathi kunye nomlinganiselo wee-T-ports, i-HMWC-OXC inokulinganisela ukusebenza kunye neendleko ngokuguquguquka phantsi komthamo owahlukileyo we-wavelength kunye noqwalaselo lwesikhokelo, inika abaqhubi amathuba okuphucula ubukhulu becala.
Uphando lwexesha elizayo lunokuphinda luhlolisise ii-algorithms zokwabiwa kwe-T-port ezinamandla ukuze kuphuculwe ukusetyenziswa kwezixhobo zangaphakathi. Ngaphezu koko, ngenkqubela phambili kwiinkqubo zokuvelisa ze-MEMS, ukudityaniswa kweeswitshi eziphezulu kuya kuphucula ngakumbi ukwandiswa kwale sakhiwo. Kubaqhubi benethiwekhi ye-optical, olu lwakhiwo lufanelekile ngokukodwa kwiimeko ezinokukhula kwetrafikhi okungaqinisekanga, okubonelela ngesisombululo sobugcisa esisebenzayo sokwakha inethiwekhi yomqolo we-optical ehlala iqinile kwaye inokwandiswa.
Ixesha lokuthumela: Agasti-21-2025