Iqembu elikhulu lonjiniyela abavela ezinkampanini ezahlukahlukene zobukhulu beNokia Bells Labs, iDeutsche Telekom T-Labs noma iTechnical University yaseMunich, lisanda kushicilela imininingwane emisha ngephrojekthi abebesebenza kuyo izinyanga nabazibize ngayo igama le- I-Probabilistic Constellation Shaping o PC.
Ngaphansi kwaleli gama eliyinqaba asitholi lutho olungaphansi kobuchwepheshe lapho ukudluliswa kwedatha kungafinyelela khona ukushesha kokufika endaweni eyodwa ngomzuzwana ngaphezu kwe-fiber optics, into engagcina imaka irekhodi elisha lamazinga wedatha. Njengoba kumenyezelwe yithimba locwaningo, yize besondele kakhulu ekufinyeleleni ngejubane elinjalo, ngeshwa lobu buchwepheshe bebungeke busatholakalela ukusetshenziswa.
Ubuchwepheshe be-PCS bungenza i-fiber optics ifinyelele ngesivinini esifika ku-1 Tbps.
Phakathi kwemininingwane ethakazelisa kakhulu yalobu buchwepheshe obusha esinabo ukuthi isebenzisa amaphuzu wezinkanyezi nge-amplitude ephezulu nemvamisa ephansi. Ngenxa yalokhu, kungenzeka ukudlulisa amasiginali amelana kakhulu nomsindo, nawo enze kube lula Uhla olude olungu-30%. Njengoba ishicilelwe ngabakwaNokia, lobu buchwepheshe busebenzisa ukuguquguquka kwesilinganiso se-quadrature ukukhulisa umthamo wokudlulisa ngesiteshi.
Isilingo sokuqala salobu buchwepheshe obusha senziwe kwinethiwekhi ye-fiber optic ephethwe yiDeutsche Telekom. Ngesikhathi sokuhlolwa, Isivinini se-1 Tbps. Ngokuya ngemininingwane yokugcina yocwaningo, ngeshwa futhi okungenani kuze kube yiminyaka eyishumi ezayo lezi zivinini akulindeleke ukuthi zifinyelele emakethe yasekhaya.
ukufinyelela lezi zivinini ekusetshenzisweni kwezohwebo kuyizindaba ezinhle njalo. Lapho ngingaboni khona ukusetshenziswa okwamanje yimakethe yasekhaya. Njengamanje sisebenzisa ama-megabyte angama-300 alinganayo emakhaya anenhlanhla enkulu futhi ngawo sithola cishe konke esikudingayo, inqwaba yeziteshi ze-TV, ucingo, njll. Ku-TV yanoma iyiphi i-opharetha, ama-megabyte ayi-10 anele futhi kunama-megabytes ama-4 we-bandwidth asele. Ngisho noma ilungu ngalinye lomndeni line-router ehlukile yokubuka i-TV, lawa ma-megabytes angama-300 amanje awasetshenziswanga. Yikuphi ukusetshenziswa okusebenzayo okukhona? Aziveli kimi esikhathini esifushane naphakathi. Lapho opharetha be-TV beqala ukunikeza iziteshi ezinqumweni ezingama-4k, sizoqala ukuqaphela ukusetshenziswa kwesiteshi sethu esenziwe inkontileka futhi nakhona lapho ngeke sikusebenzise. Umbono wami uthi ngemvelo yasekhaya kuzothatha iminyaka eminingi, eminingi ngaphambi kokusebenzisa lobu buchwepheshe ngoba abudingeki.