Iterambere ry'ikoranabuhanga rya Optical Cross-Connect (OXC)

OXC (optical cross-connect) ni verisiyo ya ROADM (Reconfigurable Optical Add-Drop Multiplexer) yahinduwe.

Nk'ikintu cy'ingenzi gihindura imiyoboro y'urumuri, kwaguka no kunoza ikiguzi cya optical cross-connects (OXCs) ntibigena gusa imiterere y'imiyoboro y'urumuri, ahubwo binagira ingaruka ku buryo butaziguye ku biciro byo kubaka no gukoresha no kubungabunga imiyoboro minini y'urumuri. Ubwoko butandukanye bwa OXC bugaragaza itandukaniro rikomeye mu miterere y'inyubako no mu ishyirwa mu bikorwa ry'imikorere.

Ishusho iri hepfo igaragaza imiterere gakondo ya CDC-OXC (Idafite Ibara Directionless Contetionless Optical Cross-Connect), ikoresha switches zitoranya ubunini bw'urumuri (WSSs). Ku ruhande rw'umurongo, 1 × N na N × 1 WSS zikora nk'uburyo bwo kwinjira/gusohoka, mu gihe M × K WSS ku ruhande rwo kongera/gumanuka zicunga kongera no kumanuka kw'ubunini bw'urumuri. Izi module zihujwe binyuze mu migozi y'urumuri iri mu gice cy'inyuma cya OXC.

Igishushanyo: Imiterere gakondo ya CDC-OXC

Ibi kandi bishobora kugerwaho binyuze mu guhindura backplane muri Spanke network, bigatuma habaho imiterere yacu ya Spanke-OXC.

Igishushanyo: Ubwubatsi bwa Spanke-OXC

Ishusho iri hejuru igaragaza ko ku ruhande rw'umurongo, OXC ifitanye isano n'ubwoko bubiri bw'ibyambu: ibyambu by'icyerekezo n'ibyambu bya fibre. Buri cyambu cy'icyerekezo gihuye n'icyerekezo cya OXC mu rwego rw'umuyoboro, mu gihe buri cyambu cya fibre kigereranya imiyoboro ibiri y'icyerekezo mu cyambu cy'icyerekezo. Icyambu cy'icyerekezo gikubiyemo imiyoboro myinshi y'icyerekezo (ni ukuvuga ibyambu byinshi bya fibre).

Nubwo OXC ishingiye kuri Spanke igera ku guhinduranya bidafunganye binyuze mu gishushanyo cy’inyuma gifatanye neza, imbogamizi zayo zirushaho kwiyongera uko urujya n’uruza rw’amakuru rugenda rwiyongera. Umubare ntarengwa w’ibice bya port of commercial wavelength selective switches (WSSs) (urugero, umubare ntarengwa w’ubu ushyigikiwe ni ports 1×48, nka Finisar's FlexGrid Twin 1×48) bivuze ko kwagura ingano ya OXC bisaba gusimbuza ibikoresho byose, ibyo bikaba bihenze kandi bikabuza kongera gukoresha ibikoresho bisanzwe.

Nubwo ifite imiterere ya OXC ishingiye ku miyoboro ya Clos, iracyakoresha M×N WSS zihenze, bigatuma bigorana kuzuza ibisabwa mu kuvugurura buhoro buhoro.

Kugira ngo bakemure iki kibazo, abashakashatsi batanze igitekerezo cy’imiterere mishya y’ikoranabuhanga: HMWC-OXC (Hybrid MEMS na WSS Clos Network). Mu guhuza sisitemu za microelectromechanical (MEMS) na WSS, iyi miterere ikomeza imikorere idahagarara ariko igashyigikira ubushobozi bwa "kwishyura uko ukura", itanga inzira yo kuvugurura ihendutse ku bakoresha imiyoboro y’amashanyarazi.

Igishushanyo fatizo cya HMWC-OXC kiri mu miterere y'umuyoboro wa Clos w'ibice bitatu.

Igishushanyo: Imiterere ya Spanke-OXC ishingiye ku miyoboro ya HMWC

Udukingirizo tw’amajwi twa MEMS dufite uburebure bwo hejuru dushyirwa ku byiciro by’injira n’ibisohoka, nk’urugero rwa 512×512 rushyigikiwe n’ikoranabuhanga ririho ubu, kugira ngo habeho ikigega kinini cy’imbuga. Icyiciro cyo hagati kigizwe na modules nyinshi nto za Spanke-OXC, zihujwe binyuze muri "T-ports" kugira ngo bigabanye ubucucike bw’imbere.

Mu cyiciro cya mbere, abakoresha bashobora kubaka ibikorwa remezo bashingiye kuri Spanke-OXC isanzweho (urugero, 4 × 4), bagakoresha gusa switches za MEMS (urugero, 32 × 32) ku byiciro by'injira n'ibisohoka, mu gihe bagumana module imwe ya Spanke-OXC mu cyiciro cyo hagati (muri iki gihe, umubare wa T-ports ni zeru). Uko ubushobozi bwa network bwiyongera, module nshya za Spanke-OXC zongerwa buhoro buhoro ku cyiciro cyo hagati, kandi T-ports zishyirwaho kugira ngo zihuze modules.

Urugero, iyo wongereye umubare wa module zo hagati kuva kuri imwe kugeza kuri ebyiri, umubare wa T-ports ushyirwa kuri imwe, bikongera ingano yose kuva kuri enye kugeza kuri esheshatu.

Ishusho: Urugero rwa HMWC-OXC

Iyi gahunda ikurikiza ikigeragezo cya parametero M > N × (S − T), aho:

M ni umubare w'ibyambu bya MEMS,
N ni umubare wa modules zo hagati,
S ni umubare w'ibyambu muri Spanke-OXC imwe, kandi
T ni umubare w'ibyambu bihujwe.

Mu guhindura ibi bipimo mu buryo buhindagurika, HMWC-OXC ishobora gushyigikira kwaguka buhoro buhoro kuva ku gipimo cy'ibanze kugera ku gipimo cy'intego (urugero, 64×64) idasimbuje ibikoresho byose by'ikoranabuhanga icyarimwe.

Kugira ngo hamenyekane imikorere nyayo y’ubu buryo bw’ikoranabuhanga, itsinda ry’ubushakashatsi ryakoze igerageza ryo kwigana rishingiye ku busabe bw’inzira y’urumuri ihinduka.

Igishushanyo: Kubuza Imikorere y'Umuyoboro wa HMWC

Iyi mikorere ikoresha uburyo bwa Erlang bwo kugenzura traffic, dufashe ko serivisi zisaba zikurikiza Poisson distribution kandi igihe cyo gufata serivisi gikurikiza negative exponential distribution. Umutwaro wose w’imodoka ushyirwa kuri 3100 Erlangs. Igipimo cya OXC cy’ingenzi ni 64×64, naho igipimo cya MEMS cy’urwego rw’injira n’isohoka nacyo ni 64×64. Imiterere ya module ya Spanke-OXC y’urwego rwo hagati irimo 32×32 cyangwa 48×48. Umubare wa T-ports uri hagati ya 0 na 16 bitewe n’ibisabwa mu gihe runaka.

Ibisubizo bigaragaza ko, mu gihe habayeho icyerekezo cya D = 4, amahirwe yo guhagarika HMWC-OXC ari hafi y’ayo Spanke-OXC isanzwe ishingiyeho (S (64,4)). Urugero, hakoreshejwe imiterere ya v (64,2,32,0,4), amahirwe yo guhagarika yiyongeraho hafi 5% gusa munsi y’umutwaro uringaniye. Iyo icyerekezo cyiyongereyeho D = 8, amahirwe yo guhagarika ariyongera bitewe n’ “ingaruka y’umutumba” n’igabanuka ry’uburebure bwa fibre muri buri cyerekezo. Ariko, iki kibazo gishobora kugabanuka neza no kongera umubare wa T-ports (urugero, imiterere ya v (64,2,48,16,8).

Ikigaragara ni uko nubwo kongeramo module zo mu cyiciro cya hagati bishobora gutera kuziba imbere bitewe n’uko hari ikibazo cya T-port, imiterere rusange ishobora kugera ku musaruro mwiza binyuze mu gushyiraho uburyo bukwiye.

Isesengura ry'ibiciro rigaragaza kandi ibyiza bya HMWC-OXC, nk'uko bigaragara ku ishusho iri hepfo.

Igishushanyo: Uburyo bwo gukumira ibyago n'igiciro cy'imiterere itandukanye ya OXC

Mu bintu bifite ubucucike bwinshi hamwe n’uburebure bwa wavelengths 80/fiber, HMWC-OXC (v(64,2,44,12,64)) ishobora kugabanya ibiciro ho 40% ugereranije na Spanke-OXC gakondo. Mu bintu bifite uburebure buke (urugero, uburebure bwa wavelengths 50/fiber), inyungu ku giciro irushaho kuba nini bitewe n’umubare muto w’ibyambu bya T bikenewe (urugero, v(64,2,36,4,64)).

Iyi nyungu mu bukungu ituruka ku guhuza ubucucike bwinshi bw'imiyoboro ya MEMS hamwe n'ingamba zo kwagura modular, ibyo bikaba birinda gusa ikiguzi cyo gusimbuza WSS nini ahubwo binagabanya ikiguzi cyo kongera gukoresha modular za Spanke-OXC zisanzweho. Ibisubizo bya simulation bigaragaza kandi ko mu guhindura umubare wa modular zo hagati n'ikigereranyo cya T-ports, HMWC-OXC ishobora kuringaniza imikorere n'ikiguzi mu buryo bworoshye munsi y'ubushobozi butandukanye bw'ubuso n'icyerekezo, bigaha abakora operators amahirwe yo kunoza imiterere y'ibipimo byinshi.

Ubushakashatsi bw'ejo hazaza bushobora gukomeza gusuzuma uburyo bwo gutanga imiyoboro ya T-port kugira ngo bunoze ikoreshwa ry'umutungo w'imbere. Byongeye kandi, hamwe n'iterambere mu mikorere ya MEMS, guhuza imiyoboro yo mu rwego rwo hejuru bizarushaho kongera ubushobozi bwo kwaguka kw'iyi miterere. Ku bakoresha imiyoboro ya optique, iyi miterere ikwiriye cyane cyane mu bihe bifite iterambere ritazwi ry'urujya n'uruza rw'abantu, itanga igisubizo gifatika cya tekiniki cyo kubaka umuyoboro w'umugongo wa optique uhamye kandi ushobora kwaguka.