OXC (optical cross-connect) yog qhov hloov pauv ntawm ROADM (Reconfigurable Optical Add-Drop Multiplexer).
Raws li cov tub ntxhais hloov pauv ntawm cov khoom siv kho qhov muag, qhov scalability thiab nqi-effectiveness ntawm optical cross-connects (OXCs) tsis tsuas yog txiav txim siab qhov yooj yim ntawm network topologies tab sis kuj cuam tshuam ncaj qha rau kev tsim kho thiab kev ua haujlwm thiab kev tu cov nqi ntawm cov khoom siv kho qhov muag loj. Ntau hom OXCs nthuav tawm qhov sib txawv tseem ceeb hauv kev tsim vaj tsev thiab kev ua haujlwm.
Daim duab hauv qab no qhia txog ib txwm muaj CDC-OXC (Colorless Directionless Contentionless Optical Cross-Connect) architecture, uas siv wavelength xaiv keyboards (WSSs). Nyob rau sab kab, 1 × N thiab N × 1 WSSs ua haujlwm raws li ingress / egress modules, thaum M × K WSSs nyob rau sab ntxiv / poob tswj qhov sib ntxiv thiab poob ntawm wavelengths. Cov modules no muaj kev sib txuas ntawm optical fibers hauv OXC backplane.
Daim duab: Traditional CDC-OXC Architecture
Qhov no tseem tuaj yeem ua tiav los ntawm kev hloov lub nraub qaum mus rau Spanke network, uas ua rau peb Spanke-OXC architecture.
Daim duab: Spanke-OXC Architecture
Daim duab saum toj no qhia tau hais tias ntawm sab kab, OXC yog txuam nrog ob hom chaw nres nkoj: cov chaw nres nkoj taw qhia thiab cov chaw nres nkoj fiber ntau. Txhua qhov chaw nres nkoj taw qhia sib raug rau thaj chaw kev taw qhia ntawm OXC hauv lub network topology, thaum txhua qhov chaw nres nkoj fiber ntau sawv cev rau ib khub ntawm bidirectional fibers hauv qhov chaw nres nkoj. Ib qhov chaw nres nkoj taw qhia muaj ntau qhov sib txawv ntawm cov fiber ntau (piv txwv li, ntau qhov chaw nres nkoj fiber ntau).
Thaum lub Spanke-raws li OXC ua tiav nruj nreem tsis thaiv kev hloov pauv los ntawm kev sib cuam tshuam kev sib txuas ntawm sab nraub qaum, nws cov kev txwv dhau los ua qhov tseem ceeb vim tias kev sib txuas hauv network tau nce. Qhov chaw nres nkoj suav txwv ntawm kev lag luam wavelength selective keyboards (WSSs) (piv txwv li, qhov siab tshaj plaws tam sim no txhawb nqa yog 1 × 48 chaw nres nkoj, xws li Finisar's FlexGrid Twin 1 × 48) txhais tau hais tias kev nthuav dav OXC qhov ntev yuav tsum tau hloov tag nrho cov khoom siv kho vajtse, uas yog kim thiab tiv thaiv kev siv cov khoom siv uas twb muaj lawm.
Txawm hais tias muaj qhov loj-dimensional OXC architecture raws li Clos tes hauj lwm, nws tseem tso siab rau M × N WSSs kim, ua rau nws nyuaj rau kev ua kom tau raws li qhov yuav tsum tau ua kom nce qib ntxiv.
Txhawm rau hais txog qhov kev sib tw no, cov kws tshawb fawb tau tshaj tawm qhov tshiab hybrid architecture: HMWC-OXC (Hybrid MEMS thiab WSS Clos Network). Los ntawm kev sib koom ua ke ntawm microelectromechanical systems (MEMS) thiab WSS, qhov kev tsim qauv no tswj hwm qhov kev ua haujlwm ze-tsis thaiv kev ua haujlwm thaum txhawb nqa "them-yuav-koj-loj hlob" muaj peev xwm, muab kev txhim kho tus nqi zoo rau cov neeg ua haujlwm kho qhov muag.
Lub hauv paus tsim ntawm HMWC-OXC nyob rau hauv nws peb-txheej Clos network qauv.
Daim duab: Spanke-OXC Architecture Raws li HMWC Networks
High-dimensional MEMS optical keyboards yog siv nyob rau hauv cov tswv yim thiab tso zis txheej, xws li 512 × 512 teev tam sim no txhawb los ntawm cov cuab yeej siv tam sim no, los tsim lub pas dej ua ke loj. Cov txheej txheem nruab nrab muaj ntau qhov me me Spanke-OXC modules, sib cuam tshuam los ntawm "T-ports" kom txo tau cov congestion sab hauv.
Nyob rau theem pib, cov neeg ua haujlwm tuaj yeem tsim cov txheej txheem raws li Spanke-OXC uas twb muaj lawm (piv txwv li, 4 × 4 nplai), tsuas yog siv MEMS keyboards (piv txwv li, 32 × 32) ntawm cov tswv yim thiab cov txheej txheem tso tawm, thaum khaws ib qho Spanke-OXC module nyob rau hauv nruab nrab txheej (qhov no, tus naj npawb ntawm T-ports yog xoom). Raws li kev xav tau ntawm lub network muaj peev xwm nce ntxiv, Spanke-OXC modules tshiab tau maj mam ntxiv rau hauv nruab nrab txheej, thiab T-ports tau teeb tsa los txuas cov modules.
Piv txwv li, thaum nthuav tus naj npawb ntawm cov txheej txheem nruab nrab ntawm ib mus rau ob, tus naj npawb ntawm T-ports tau teem rau ib qho, ua kom tag nrho qhov ntev ntawm plaub mus rau rau.
Figure: HMWC-OXC Example
Cov txheej txheem no ua raws li qhov ntsuas qhov ntsuas M> N × (S − T), qhov twg:
M yog tus naj npawb ntawm MEMS chaw nres nkoj,
N yog tus naj npawb ntawm cov txheej txheem nruab nrab,
S yog tus naj npawb ntawm cov chaw nres nkoj hauv ib qho Spanke-OXC, thiab
T yog tus naj npawb ntawm cov chaw nres nkoj sib txuas.
Los ntawm kev hloov kho qhov tsis zoo no, HMWC-OXC tuaj yeem txhawb kev nthuav dav zuj zus los ntawm qhov pib ntsuas mus rau lub hom phiaj qhov ntev (xws li 64 × 64) yam tsis tau hloov tag nrho cov khoom siv kho vajtse ib zaug.
Txhawm rau txheeb xyuas qhov ua tau zoo ntawm qhov kev tsim vaj tsev no, pab pawg tshawb fawb tau sim simulation kev sim raws li kev thov kev kho qhov muag dynamic.
Daim duab: Blocking Performance of HMWC Network
Kev simulation siv tus qauv Erlang tsheb, piv txwv li kev thov kev pabcuam ua raws li Poisson faib thiab kev pabcuam tuav sijhawm ua raws li qhov tsis zoo ntawm kev faib tawm. Tag nrho cov tsheb thauj khoom yog teem rau 3100 Erlangs. Lub hom phiaj OXC qhov ntev yog 64 × 64, thiab cov tswv yim thiab cov txheej txheem MEMS scale kuj yog 64 × 64. Qhov nruab nrab txheej Spanke-OXC module teeb tsa suav nrog 32 × 32 lossis 48 × 48 specifications. Tus naj npawb ntawm T-ports nyob ntawm 0 txog 16 nyob ntawm seb qhov yuav tsum tau ua.
Cov txiaj ntsig tau pom tias, hauv qhov xwm txheej nrog qhov taw qhia qhov ntev ntawm D = 4, qhov thaiv qhov tshwm sim ntawm HMWC-OXC yog ze rau ntawm cov kab ke ib txwm Spanke-OXC (S(64,4)). Piv txwv li, siv cov v(64,2,32,0,4) configuration, qhov thaiv qhov tshwm sim nce los ntawm kwv yees li 5% nyob rau hauv nruab nrab load. Thaum qhov taw qhia qhov ntev nce mus rau D = 8, qhov thaiv qhov tshwm sim yuav nce vim "cov nyhuv pob tw" thiab qhov txo qis ntawm fiber ntau hauv txhua qhov kev coj. Txawm li cas los xij, qhov teeb meem no tuaj yeem daws tau zoo los ntawm kev nce T-ports (piv txwv li, v(64,2,48,16,8) configuration).
Qhov tseem ceeb, txawm hais tias qhov sib ntxiv ntawm cov txheej txheem nruab nrab tuaj yeem ua rau muaj kev cuam tshuam sab hauv vim T-chaw nres nkoj sib cav, tag nrho cov qauv tseem tuaj yeem ua tiav qhov kev ua tau zoo los ntawm kev teeb tsa tsim nyog.
Kev txheeb xyuas tus nqi ntxiv qhia txog qhov zoo ntawm HMWC-OXC, raws li pom hauv daim duab hauv qab no.
Daim duab: Blocking Probability and cost of Different OXC Architectures
Hauv cov xwm txheej siab ceev nrog 80 wavelengths / fiber ntau, HMWC-OXC (v(64,2,44,12,64)) tuaj yeem txo cov nqi 40% piv rau cov tsoos Spanke-OXC. Hauv cov xwm txheej tsis tshua muaj wavelength (piv txwv li, 50 wavelengths / fiber ntau), tus nqi kom zoo dua yog qhov tseem ceeb dua vim qhov txo qis ntawm T-ports (xws li v(64,2,36,4,64)).
Qhov txiaj ntsig kev lag luam no yog los ntawm kev sib xyaw ua ke ntawm qhov chaw nres nkoj siab ntawm MEMS keyboards thiab lub tswv yim nthuav dav, uas tsis yog tsuas yog zam kev siv nyiaj ntau ntawm WSS hloov pauv tab sis kuj txo cov nqi nce ntxiv los ntawm kev rov siv dua Spanke-OXC modules uas twb muaj lawm. Simulation cov txiaj ntsig tseem qhia tau tias los ntawm kev kho tus naj npawb ntawm cov txheej txheem nruab nrab thiab qhov sib piv ntawm T-ports, HMWC-OXC tuaj yeem hloov pauv qhov kev ua tau zoo thiab tus nqi raws li qhov sib txawv wavelength muaj peev xwm thiab cov kev taw qhia teeb tsa, muab cov neeg ua haujlwm nrog ntau qhov kev ua kom zoo dua qub.
Cov kev tshawb fawb yav tom ntej tuaj yeem tshawb nrhiav dynamic T-port faib algorithms los txhim kho kev siv cov peev txheej sab hauv. Tsis tas li ntawd, nrog kev nce qib hauv MEMS cov txheej txheem tsim khoom, kev sib koom ua ke ntawm kev hloov pauv siab dua yuav ua rau muaj kev nthuav dav ntxiv ntawm cov qauv no. Rau cov neeg ua haujlwm kho qhov muag, cov qauv no tshwj xeeb tshaj yog tsim rau cov xwm txheej uas tsis paub meej txog kev loj hlob, muab cov tswv yim kev daws teeb meem rau kev tsim kom muaj zog thiab scalable all-optical backbone network.
Post lub sij hawm: Aug-21-2025