Indlela yokusebenzisa ukukhanya ukuhambisa ulwazi kunokuthiwa inembali ende.
I-"Beacon Tower" yanamhlanje ivumele abantu ukuba bafumane ithuba lokuhambisa ulwazi ngokukhanya.Nangona kunjalo, le ndlela yokunxibelelana ye-optical yamandulo ibuyele ngasemva, inqunyelwe ngumgama wokudluliselwa obonakalayo kwiso lenyama, kwaye ukuthembeka akuphezulu.Ngeemfuno zophuhliso lokuhanjiswa kolwazi lwentlalo, ukuzalwa konxibelelwano lwanamhlanje lwe-optical kuye kwakhuthazwa ngakumbi.
Qalisa itekhnoloji yonxibelelwano yanamhlanje
Ngowe-1800, uAlexander Graham Bell wavelisa i-“optical phone.”
Kwi-1966, i-British-Chinese Gao Kun iphakamise i-theory ye-fiber optical transmission, kodwa ngelo xesha ukulahleka kwe-fiber optical kwakuphezulu njenge-1000dB / km.
Kwi-1970, uphando kunye nophuhliso lwe-quartz fiber kunye ne-semiconductor laser iteknoloji yanciphisa ilahleko yefiber ukuya kwi-20dB / km, kwaye i-laser intensity iphezulu, ukuthembeka kunamandla.
Kwi-1976, uphuhliso oluqhubekayo lweteknoloji ye-fiber optical yanciphisa ilahleko nge-0.47dB / km, nto leyo ethetha ukuba ilahleko ye-transmission medium iye yasonjululwa, eyakhuthaza uphuhliso olunamandla lweteknoloji ye-optical transmission.
Phonononga imbali yophuhliso lothungelwano losasazo
Uthungelwano losasazo ludlule ngaphezulu kweminyaka engamashumi amane.Ngamafutshane, ifumene iPDH, SDH/MSTP,
Uphuhliso lwetekhnoloji kunye nokuveliswa kwezinto ezintsha zeWDM/OTN kunye nePeOTN.
Isizukulwana sokuqala sothungelwano lweengcingo ukubonelela ngeenkonzo zelizwi ezamkelwe kwi-PDH (Plesiochronous Digital Hierarchy) iteknoloji.
Isizukulwana sesibini sibonelela ngeenkonzo zokufikelela kwiWebhu kunye nemigca enikezelweyo ye-TDM, usebenzisa i-SD (i-Synchronous Digital Hierarchy)/MSTP (i-Multi-Service Transport Platform) iteknoloji.
Isizukulwana sesithathu saqala ukuxhasa uxhulumaniso lweenkonzo zevidiyo kunye namaziko edatha, usebenzisa i-WDM (i-Wavelength Division Multiplexing, i-Wavelength Division Multiplexing) / i-OTN (i-Optical Transmission Network, i-Optical Transmission Network) iteknoloji.
Isizukulwana sesine siqinisekisa i-4K ephezulu yenkcazo yevidiyo kunye namava omgca wabucala osemgangathweni, usebenzisa i-PeOTN (Ipakethi ephuculweyo ye-OTN, iteknoloji yokuphucula i-OTN).
Kwinqanaba lokuqala lophuhliso lwezizukulwana ezibini zokuqala, kwiinkonzo zezwi, ukufikelela kwi-Intanethi ye-Intanethi kunye neenkonzo ze-TDM zangasese zomgca, ezimelwe yi-SDH / MSTP ye-teknoloji ye-synchronous ye-digital technology, isekela i-interfaces ezininzi ezifana ne-Ethernet, i-ATM / IMA, njl. inokudibanisa i-CBR/VBR eyahlukileyo.Hlanganisa iinkonzo kwiifreyimu zeSDH, ukwahlula ngokwasemzimbeni imibhobho enzima, kwaye ugxininise kwisantya esisezantsi kunye neenkonzo ezincinci.
Emva kokungena kwisigaba sophuhliso lwesizukulwana sesithathu, ngokukhula okukhawulezayo komthamo wenkonzo yonxibelelwano, ngokukodwa iinkonzo zevidiyo kunye nedatha yedatha yokudibanisa, i-bandwidth yenethiwekhi iye yakhawuleza.I-teknoloji ye-optical layer emelwe yi-teknoloji ye-WDM yenza ukuba i-fiber enye ikwazi ukuthwala iinkonzo ezininzi.Ngokukodwa, i-DWDM (i-Dense Wavelength Division Multiplexing) iteknoloji isetyenziswe ngokubanzi kwiinethiwekhi ezinkulu zokuhanjiswa kwekhaya, ukuxazulula ngokupheleleyo ingxaki yokudluliselwa.Umba womgama kunye nomthamo we-bandwidth.Ukujonga umlinganiselo wokwakhiwa kwenethiwekhi, i-80x100G iye yaba yinto eqhelekileyo kwimizila ye-trunk emide, kwaye i-80x200G amanethiwekhi asekuhlaleni kunye needolophu zedolophu ziye zaphuhliswa ngokukhawuleza.
Ukuqhutywa kweenkonzo ezihlanganisiweyo ezifana nevidiyo kunye nemigca ezinikeleyo, uthungelwano lwezothutho olusisiseko lufuna ukuguquguquka ngakumbi kunye nobukrelekrele.Ke ngoko, itekhnoloji ye-OTN ngokuthe ngcembe ivela.I-OTN yinkqubo entsha kraca yeteknoloji yothumelo lwe-optical transmission echazwe yi-ITU-T G.872, G.798, G.709 kunye nezinye iiprothokholi.Ibandakanya ulwakhiwo olupheleleyo lwenkqubo ye-optical layer kunye ne-electrical layer, kwaye inenethiwekhi ezihambelanayo zomaleko ngamnye.Indlela yokubeka iliso yolawulo kunye nendlela yokuphila kothungelwano.Xa sijonga iindlela zangoku zokwakha uthungelwano lwasekhaya, i-OTN iye yaba ngumgangatho wothungelwano lothungelwano, ngakumbi kulwakhiwo lothungelwano lwasekhaya lwabaqhubi kunye nothungelwano lwengingqi yemetropolitan.Itekhnoloji ye-OTN esekelwe kwi-crossover layer yombane iyamkelwa ngokusisiseko, kwaye i-architecture yokwahlula umgca wesebe isetyenziswa., Ukufezekisa ukuchithwa kwecala lenethiwekhi kunye necala lomgca, ukuphucula kakhulu ukuguquguquka kwenethiwekhi kunye nokukwazi ukuvula ngokukhawuleza kunye nokuhambisa iinkonzo.
Inguqu yothungelwano olujoliswe kushishino
Ukukhawuleziswa okungaphezulu kweenguqu zedijithali kuzo zonke iinkalo zoqoqosho lwentlalo kuzise uphuhliso oluhambelanayo loshishino lwe-ICT lulonke kunye noqoqosho lwedijithali, kwaye lukhuthaze kwaye lwabangela utshintsho olunzulu kushishino.Ngokungena kwenani elikhulu lamashishini amatsha kwimizi-mveliso ethe nkqo, amashishini emveli kunye neemodeli zokusebenza kunye neemodeli zoshishino zihlala zisakhiwa ngokutsha, kubandakanywa: imali, imicimbi karhulumente, unyango, imfundo, ishishini kunye nezinye iinkalo.Ukujongana nemfuno eyandayo yonxibelelwano olukumgangatho ophezulu kunye nolwahlulo lweshishini, itekhnoloji yePeOTN ngokuthe ngcembe iqalise ukusetyenziswa ngokubanzi.
·Uluhlu lwe-L0 kunye ne-L1 lubonelela ngemibhobho eqinileyo "enzima" emelwe yi-wavelength λ kunye ne-sub-channel ODUk.I-bandwidth enkulu kunye nokulibaziseka okuphantsi ziinzuzo zayo eziphambili.
·I-L2 layer inokubonelela ngombhobho “othambileyo” oguquguqukayo.I-bandwidth yombhobho ihambelana ngokupheleleyo nenkonzo kunye noshintsho kunye nokutshintsha kwetrafikhi yenkonzo.Ukuguquguquka kunye nokufunwayo zezona zinto ziluncedo.
Ukudibanisa iinzuzo ze-SDH / MSTP / MPLS-TP zokuphatha iinkonzo ezincinci ze-particle, ukwenza i-L0 + L1 + L2 isisombululo sothutho lwezothutho, ukwakha i-platform yezothutho zeenkonzo ezininzi ze-PeOTN, ukudala umthamo obanzi wokuthwala kunye nezakhono ezininzi kwinethiwekhi enye.Ngo-2009, i-ITU-T yandise amandla othumelo e-OTN ukuxhasa iinkonzo ezahlukeneyo kwaye ibandakanya ngokusemthethweni i-PeOTN kumgangatho.
Kwiminyaka yakutshanje, abaqhubi behlabathi benze iinzame kwimarike yeshishini labucala likarhulumente.Abasebenzi abathathu basekhaya abaphambili baphuhlisa i-OTN karhulumente-ishishini lolwakhiwo lwenethiwekhi yabucala.Iinkampani zephondo nazo zityale imali eninzi.Ukuza kuthi ga ngoku, bangaphezulu kwama-30 abaqhubi beenkampani zephondo abavule i-OTN.Inethiwekhi yabucala ekumgangatho ophezulu, kwaye ikhuphe iimveliso zeline zabucala zexabiso eliphezulu ezisekwe kwi-PeOTN, ukukhuthaza inethiwekhi yezothutho yamehlo ukusuka "kwinethiwekhi yezixhobo ezisisiseko" ukuya "kwinethiwekhi yabathwali beshishini."
Ixesha lokuposa: Nov-04-2021