Tsela ea ho sebelisa leseli ho fetisa boitsebiso ho ka boleloa hore e na le histori e telele.
"Beacon Tower" ea morao-rao e lumelletse batho ho fumana boiketlo ba ho fetisa boitsebiso ka leseli.Leha ho le joalo, mokhoa ona oa khale oa puisano oa optical o batla o le morao, o lekanyelitsoe ke sebaka sa phetiso se bonahalang ka mahlo, 'me ho tšepahala ha ho phahameng.Ka litlhoko tsa nts'etsopele ea phetisetso ea litaba tsa sechaba, tsoalo ea puisano ea kajeno ea optical e khothalelitsoe ka ho eketsehileng.
Qala theknoloji ea morao-rao ea puisano ea optical
Ka 1800, Alexander Graham Bell o ile a qapa "optical phone".
Ka 1966, British-Chinese Gao Kun e ile ea etsa tlhahiso ea khopolo ea optical fiber transmission, empa ka nako eo tahlehelo ea fiber ea optical e ne e le holimo ho 1000dB / km.
Ka 1970, lipatlisiso le nts'etsopele ea theknoloji ea quartz fiber le semiconductor laser e ile ea fokotsa tahlehelo ea fiber ho 20dB / km, 'me matla a laser a phahame, ho tšepahala ho matla.
Ka 1976, tsoelo-pele e tsoelang pele ea theknoloji ea optical fiber e ile ea fokotsa tahlehelo ka 0.47dB / km, e bolelang hore tahlehelo ea mochine oa phetisetso e ne e rarollotsoe, e leng se ileng sa khothalletsa tsoelo-pele e matla ea theknoloji ea optical transmission.
Hlahloba nalane ea nts'etsopele ea marang-rang a phetiso
Marang-rang a phetiso a fetile lilemo tse fetang mashome a mane.Ka kakaretso, e bile le PDH, SDH/MSTP,
Nts'etsopele ea theknoloji le tlhahiso ea tlhahiso ea WDM/OTN le PeOTN.
Moloko oa pele oa marang-rang a marang-rang ho fana ka lits'ebeletso tsa lentsoe tse amohetseng theknoloji ea PDH (Plesiochronous Digital Hierarchy).
Moloko oa bobeli o fana ka litšebeletso tsa ho fihlella Websaete le mela e inehetseng ea TDM, ho sebelisa theknoloji ea SD (Synchronous Digital Hierarchy)/MSTP (Multi-Service Transport Platform).
Moloko oa boraro o ile oa qala ho tšehetsa ho hokahanya ha litšebeletso tsa video le litsi tsa data, ho sebelisa theknoloji ea WDM (Wavelength Division Multiplexing, Wavelength Division Multiplexing) / OTN (Optical Transmission Network, Optical Transmission Network).
Moloko oa bone o tiisa 4K phihlelo ea boleng bo phahameng ba video le boleng ba mohala oa poraefete, o sebelisa theknoloji ea PeOTN (Packet enhancedOTN, pakete e ntlafalitsoeng ea OTN).
Boemong ba pele ba nts'etsopele ea meloko e 'meli ea pele, bakeng sa lits'ebeletso tsa lentsoe, phihlello ea Marang-rang le lits'ebeletso tsa mohala tsa poraefete tsa TDM, tse emeloang ke theknoloji ea SDH/MSTP synchronous digital system, e tšehetsa li-interfaces tse ngata tse kang Ethernet, ATM / IMA, joalo-joalo, le e ka hokela CBR/VBR e fapaneng.Koahela lits'ebeletso ho liforeimi tsa SDH, arola liphaephe tse thata 'meleng, 'me u tsepamise maikutlo litšebeletsong tsa lebelo le tlase le tse nyane.
Ka mor'a ho kena sethaleng sa nts'etsopele ea moloko oa boraro, ka khōlo e potlakileng ea bokhoni ba tšebeletso ea puisano, haholo-holo litšebeletso tsa ho hokahanya ha setsi sa video le setsi sa data, marang-rang a marang-rang a potlakile.Theknoloji ea optical layer e emeloang ke theknoloji ea WDM e etsa hore ho khonehe hore fiber e le 'ngoe e nke litšebeletso tse ngata.Ka ho khetheha, theknoloji ea DWDM (Dense Wavelength Division Multiplexing) e 'nile ea sebelisoa haholo ho marang-rang a maholo a tsamaiso ea malapeng, ho rarolla bothata ka ho feletseng.Taba ea bohole le bophahamo ba bandwidth.Ha re sheba tekanyo ea kaho ea marang-rang, 80x100G e se e le eona e ka sehloohong ho mela e telele ea li-trunk, 'me marang-rang a sebaka sa 80x200G le metse ea metse e meholo e tsoetse pele ka potlako.
Bakeng sa ho tsamaisa lits'ebeletso tse kopaneng joalo ka lifitio le mela e inehetseng, marang-rang a mantlha a lipalangoang a hloka ho feto-fetoha ha maemo le bohlale.Ka hona, theknoloji ea OTN e hlaha butle-butle.OTN ke mokhoa o mocha oa theknoloji oa phetiso ea mahlo o hlalosoang ke ITU-T G.872, G.798, G.709 le liprothokholo tse ling.E kenyelletsa sebopeho sa sistimi e felletseng ea lera la optical le lera la motlakase, 'me le na le marang-rang a lumellanang bakeng sa lera ka leng.Mokhoa oa ho shebella tsamaiso le mokhoa oa ho pholoha ha marang-rang.Ho latela mekhoa ea hajoale ea kaho ea marang-rang ea lehae, OTN e fetohile tekanyetso ea marang-rang a phetisetso, haholo-holo kahong ea marang-rang a lehae le marang-rang a libaka tsa litoropo.Theknoloji ea OTN e thehiloeng holim'a crossover ea motlakase e amoheloa, 'me ho sebelisoa mohaho oa karohano ea lekala., Ho finyella ho senyeha ha lehlakoreng la marang-rang le lehlakoreng la mohala, ho ntlafatsa haholo ho feto-fetoha ha marang-rang le bokhoni ba ho bula le ho tsamaisa litšebeletso ka potlako.
Phetoho ea marang-rang e amanang le khoebo
Katoloso e eketsehileng ya diphethoho tsa dijithale dibakeng tsohle tsa moruo wa kahisano e tlisitse ntshetsopele e tshwanang ya indasteri yohle ya ICT le moruo wa dijithale, mme e khothaleditse le ho tsosa diphetoho tse tebileng indastering ena.Ka keketseho ea palo e kholo ea likhoebo tse ncha liindastering tse emeng, liindasteri tsa setso le mehlala ea ts'ebetso le mehlala ea khoebo li lula li ntse li nchafatsoa, ho kenyelletsa: lichelete, litaba tsa mmuso, tlhokomelo ea bongaka, thuto, indasteri le likarolo tse ling.E tobane le tlhokahalo e ntseng e eketseha ea likhokahano tsa khoebo tsa boleng bo holimo le tse fapaneng, theknoloji ea PeOTN e se e qalile ho sebelisoa haholo butle-butle.
·Likarolo tsa L0 le L1 li fana ka liphaephe tse "thata" tse thata tse emeloang ke wavelength λ le sub-channel ODUk.Li-bandwidth tse kholo le ho lieha ho fokolang ke melemo ea eona e ka sehloohong.
·Lera la L2 le ka fana ka phala e "bonolo" e tenyetsehang.Bophahamo ba phala ea pipe bo lumellana ka ho feletseng le tšebeletso le liphetoho ka phetoho ea sephethephethe sa tšebeletso.Ho feto-fetoha ha maemo le ho hlokehang ke melemo ea eona e ka sehloohong.
Ho kopanya melemo ea SDH / MSTP / MPLS-TP bakeng sa ho jara lits'ebeletso tse nyenyane, ho etsa tharollo ea marang-rang ea L0 + L1 + L2 ea lipalangoang, ho haha sethala sa lipalangoang tsa litšebeletso tse ngata tsa PeOTN, ho etsa hore ho be le matla a mangata a ho jara a nang le bokhoni bo bongata marang-rang a le mong.Ka 2009, ITU-T e ile ea holisa bokhoni ba phetisetso ea OTN ho ts'ehetsa lits'ebeletso tse fapaneng mme ea kenyelletsa ka molao PeOTN maemong.
Lilemong tsa morao tjena, basebetsi ba lefats'e ba entse boiteko 'marakeng oa poraefete oa likhoebo tsa' muso.Basebetsi ba bararo ba ka sehloohong ba malapeng ba nts'etsapele ka mafolofolo kaho ea marang-rang a ikemetseng a 'muso oa OTN.Likhamphani tsa liprofinse le tsona li tsetetse haholo.Ho fihlela hajoale, basebetsi ba fetang 30 ba lik'hamphani tsa provense ba butse OTN.Marang-rang a poraefete a boleng bo holimo, 'me a lokolotse lihlahisoa tsa boleng bo holimo tsa poraefete tse thehiloeng ho PeOTN, ho khothaletsa marang-rang a lipalangoang ho tloha "marang-rang a lisebelisoa" ho isa "marang-rang a bareki ba khoebo."
Nako ea poso: Nov-04-2021