I-EPON (Ethernet Passical Network)
Inethiwekhi ye-Ethernet Passical Optical inethiwekhi ye-PON ubuchwepheshe obususelwa ku-Ethernet. Ithola iphuzu ukuze amushelwe ukwakheka kanye nokuhanjiswa kwe-fiber optic, ukuhlinzeka ngezinsizakalo eziningi ngaphezulu kwe-Ethernet. Ubuchwepheshe be-EPON buhlelwe yiqembu elisebenzayo le-IFM802.3. NgoJuni 2004, iqembu elisebenzayo le-IEEEE802.3EFM likhiphe i-Epton Standard - iee802.3h (lihlanganiswe kwi-IEEEE802.3-2005 Standard ngo-2005).
Kuleli Zinga, ubuchwepheshe be-Ethernet no-PON buhlanganisiwe, nobuchwepheshe be-PON obusetshenziswa kungqimba lomzimba kanye ne-Ethernet Protocol esetshenziswe ungqimba lwesixhumanisi sedatha, usebenzisa i-topology ye-pon ukufezekisa ukufinyelela kwe-ethernet. Ngakho-ke, kuhlanganisa nezinzuzo zobuchwepheshe be-pon nobuchwepheshe be-Ethernet: izindleko eziphansi, i-bandwidth ephezulu, ukuhambisana okunamandla, ukuhambisana ne-ethernet ekhona, ukuphathwa okulula, njll.
I-GPon (Gigabit - I-Pon Pouble Pon)
Ubuchwepheshe buyisizukulwane sakamuva se-Broadband Passical Aptical actical action action action action action ezihlanganisiwe ku-ITU-TG.984. x Okujwayelekile, okunezinzuzo eziningi ezinjenge-bandwidth ephezulu, ukusebenza kahle okuphezulu, indawo enkulu yokumboza, kanye nokuxhumana komsebenzisi okucebile. Kubhekwa ngabasebenzi abaningi njengobuchwepheshe obuhle bokuthola ukuguqulwa kwe-Broadband kanye nokuguqulwa okuphelele kwezinsizakalo zenethiwekhi. I-GONPon yahlongozwa okokuqala yinhlangano ye-FSAN ngoSepthemba 2002
Ubuchwepheshe be-GNon buqhamuka kwiZinga lobuchwepheshe be-Atton Technology okwakheka kancane kancane ngo-1995, kanti i-pon imele "nenethiwekhi yokuqonda" ngesiNgisi. I-GPon (Gigabit enekhono lokuphambanisa i-Optical Network) yaqala ukuhlongozwa yinhlangano ye-FSAN ngoSepthemba 2002 Isakhiwo esiyisisekelo samadivayisi asuselwa kubuchwepheshe be-GON ubuchwepheshe esifanayo esifana ne-pon ekhona, enesifo somugqa we-OLT (i-Optical Line terminal) ehhovisini eliphakathi nendawo, i-Optical Distribution Network) eyakhiwe nge-fiber eyodwa ye-ONT.
Umehluko phakathi kwe-EPON NE-GON
I-GPon isebenzisa ubuchwepheshe be-wavengeth divising Multenxing (WDM) ukunika amandla ukulayishwa kanyekanye nokulanda. Imvamisa, i-1490nm optical carrier esetshenziselwa ukulanda, ngenkathi i-1310NM Optical Carrier ikhethiwe yokulayisha. Uma izibonakaliso ze-TV zidinga ukudluliselwa, kuzosetshenziswa isithwali se-optical esingu-1550nm. Yize i-ONE ngayinye ingafinyelela ijubane lokulanda lama-2.488 GBITS / SPOT, GONGS futhi lisebenzisa isikhathi sokuhlukaniswa okuningi ukufinyelela okuningi (i-TDMA) ukwaba isikhathi esithile somsebenzisi ngamunye kusiginali ngayinye.
Izinga eliphezulu lokulanda le-XGONS lifinyelela ku-10gbits / s, futhi izinga lokulayisha libuye libe yi-2.5gbit / s. Isebenzisa futhi ubuchwepheshe be-WDM, kanye namagagasi e-Upstream and Downstream Optical Carriers angama-1270nm no-1577NM, ngokulandelana.
Ngenxa yesilinganiso esandayo sokudlulisa, i-onis engaphezulu ingahlukaniswa ngokuya ngefomethi efanayo yedatha, ngebanga eliphakeme elifinyelela ku-20km. Yize i-XGNOn ingamukelwa kabanzi kabanzi, ihlinzeka ngendlela enhle yokuthuthukisa yabasebenza ngokuxhumana.
I-EPON iyahambisana ngokuphelele namanye amazinga we-Ethernet, ngakho-ke asikho isidingo sokuguqulwa noma ukuguqulwa lapho kuxhunywe kumanethiwekhi asethernet, ngokulayishwa okuphezulu kwamabhande aphezulu angu-1518. I-EPON ayidingi indlela yokufinyelela ye-CSMA / CD ezinguqulweni ezithile ze-Ethernet. Ngaphezu kwalokho, njengoba ukuhanjiswa kwe-Ethernet kuyindlela esemqoka yokudluliswa kwenethiwekhi yendawo yendawo, asikho isidingo sokuguqulwa kwe-protocol yenethiwekhi ngesikhathi sokuthuthuka kwinethiwekhi yendawo yedolobha elikhulu.
Kukhona futhi inguqulo ye-10 gbit / s ethernet eqokwe njengo-802.3AV. Ijubane lomugqa wangempela lingama-10.3125 gbits / s. Imodi eyinhloko iyi-10 GBITS / S PLITSING kanye ne-DownLink Rate, nabanye besebenzisa ama-gbits / s downlink kanye 1 gbit / splink.
Uhlobo lwe-GBIT / S lusebenzisa ama-wavelength ahlukene we-fiber, nge-wavelthth ephansi ye-1575-1580NM kanye ne-upstream wavelength ka 1260-1280NM. Ngakho-ke, uhlelo lwe-10 GBIT / S kanye nohlelo lwe-1Gbit / S olujwayelekile lungaba yi-wavelength oluningi kwi-fiber efanayo.
Ukuhlanganiswa kathathu okuhlanganisiwe
Ukuhlangana kwamanethiwekhi amathathu kusho ukuthi kwinqubo yokuziphendukela kwemvelo kusuka kunethiwekhi yezokuxhumana, inethiwekhi yomsakazo nelethelevishini, ukuxhumeka kwezobuchwepheshe, ukuxhumanisa izinsizakusebenza, kanye nokwabelana ngethelevishini kanye nezinye izinsizakalo. Ukuhlanganiswa kathathu akusho ukuhlanganiswa ngokomzimba kwamanethiwekhi amathathu amakhulu, kepha ikakhulukazi kubhekiswa ekuhlanganiseni kwezicelo zebhizinisi eliphakeme.
Ukuhlanganiswa kwamanethiwekhi amathathu kusetshenziswa kabanzi emikhakheni ehlukahlukene njengokuhamba okuhlakaniphile, ukuvikelwa kwemvelo, umsebenzi kahulumeni, ukuphepha komphakathi, kanye nemizi ephephile. Esikhathini esizayo, izingcingo eziphathwayo zingabuka i-TV bese zisebenzisa i-Intanethi, i-TV kungenza izingcingo bese isebenzisa i-Intanethi, futhi amakhompyutha nawo angenza izingcingo bese ubuka i-TV futhi ubuke i-TV.
Ukuhlanganiswa kwamanethiwekhi amathathu kungahlaziywa ngokomqondo kusuka ekubukeni okuhlukile namazinga, okubandakanya ukuhlanganiswa kobuchwepheshe, ukuhlanganiswa kwebhizinisi, ukuhlanganiswa kwezimboni, ukuhlanganiswa kwemboni, nokuhlanganiswa kwenethiwekhi, kanye nokuhlanganiswa kwenethiwekhi, kanye nokuhlanganiswa kwenethiwekhi, nokuhlanganiswa kwenethiwekhi, kanye nokuhlanganiswa kwenethiwekhi, kanye nokuhlanganiswa kwenethiwekhi, nokuhlanganiswa kwenethiwekhi, kanye nokuhlanganiswa kwenethiwekhi, kanye nokuhlanganiswa kwenethiwekhi, kanye nokuhlanganiswa kwenethiwekhi, kanye nokuhlanganiswa kwenethiwekhi, kanye nokuhlanganiswa kwenethiwekhi, kanye nokuhlanganiswa kwenethiwekhi, kanye nokuhlanganiswa kwenethiwekhi, kanye nokuhlanganiswa kwenethiwekhi, kanye nokuhlanganiswa kwenethiwekhi, kanye nokuhlanganiswa kwenethiwekhi, kanye nokuhlanganiswa kwenethiwekhi, kanye nokuhlanganiswa kwenethiwekhi, kanye nokuhlanganiswa kwenethiwekhi.
Ubuchwepheshe be-Broadband
Umzimba omkhulu we-Broadband Technology ubuchwepheshe bokuxhumana kwe-Fiber Optic. Enye yezinhloso zokuhlangana kwenethiwekhi ukuhlinzeka ngezinsizakalo ezihlanganisiwe ngenethiwekhi. Ukuhlinzeka ngezinsizakalo ezihlanganisiwe, kuyadingeka ukuthi ube nepulatifomu yenethiwekhi engasekela ukuhanjiswa kwezinsizakalo ezahlukahlukene ze-multimedia (ukusakaza imidiya) njengokulalelwayo nevidiyo.
Izici zalawa mabhizinisi zifuna ibhizinisi eliphakeme, ivolumu yedatha enkulu, nezidingo ezisezingeni eliphakeme zensizakalo, ngakho-ke zidinga ngokuvamile i-bandwidth enkulu ngesikhathi sokudluliselwa. Ngaphezu kwalokho, ngombono wezomnotho, izindleko akufanele ziphezulu kakhulu. Ngale ndlela, ubuchwepheshe bokuxhumana obuphezulu nobukhulu be-fiber optic sebuphenduke isinqumo esihle kakhulu semithombo yezindaba yokuthumela. Ukuthuthukiswa kwe-Broadband Technology, ikakhulukazi ubuchwepheshe bokuxhumana kwe-Optical
Njengobuchwepheshe besinsika enkambisweni yokuxhumana yanamuhla, ubuchwepheshe bokuxhumana kwe-Optical Communom bukhula ngesilinganiso sokukhula kwezikhathi eziyi-100 njalo eminyakeni eyi-10. Ukudluliswa kwe-fiber optic nge-form enkulu iyipulatifomu engcono yokuhambisa "amanethiwekhi amathathu" kanye nomthwali ophambili womzimba wolwazi oluzayo. Ubuchwepheshe obukhulu bokuxhumana kwe-fiber optic busetshenziswe kabanzi kumanethiwekhi okuxhumana ngocingo, amanethiwekhi ekhompyutha, kanye namanethiwekhi wethelevishini.
Isikhathi sePosi: Dece-12-2024