Ukuba awuwazi umahluko phakathi kwe-EPON Vs GPON kulula ukubhideka ngelixa uthenga.Ngeli nqaku masifunde ukuba yintoni i-EPON, yintoni i-GPON, kwaye yeyiphi ekufuneka iThengwe?
Yintoni i-EPON?
Inethiwekhi ye-Ethernet ye-passive optical ifom epheleleyo ye-acronym ye-EPON.I-EPON yindlela yokudibanisa iikhomputha kwiinethiwekhi ezahlukeneyo zonxibelelwano.Ngokwahlukileyo kwi-EPON, i-GPON isebenza kwiiseli ze-ATM.I-EPON kunye ne-GPON zohlulwe ngolu hlobo.Ukuphunyezwa kwePakethi eYomeleziweyo ngaphezu kweeNethiwekhi zeBandwidth Networks (EPON) kwiFiber kwiNdawo kunye neFiber kwiinkqubo zaseKhaya.I-EPON yenza ukuba iziphelo ezininzi zinxibelelane ngefiber enye ye-optical.I-EPON ithumela idatha, iaudio, kunye nevidiyo kwi-Intanethi ngeepakethi ze-Ethernet.Akukho tshintsho olongezelelweyo okanye i-encapsulation efunekayo kuqhagamshelwano lwe-EPON kuba ibuyela ngasemva-iyahambelana neminye imigangatho ye-Ethernet.Akunzima ukufikelela kwi-1 Gbps okanye i-10 Gbps.Ukuyibeka ngenye indlela, kubiza kancinci kuneGPON.
Yintoni i-GPON?
I-Gigabit Ethernet Passive Optical Network ligama elipheleleyo le-akhronimi ye-GPON.
Ukunxibelelana ngelizwi, i-Gigabit Ethernet Passive Optical Network isebenzisa iprotocol ye-ATM, ngelixa i-data traffic iqhutywa nge-Ethernet.Izantya ezikhawulezayo ezisezantsi naphezulu ziyafumaneka ngeGPON xa kuthelekiswa neEPON.Inethiwekhi ye-Broadband passive optical, okanye i-GPON, ngumgangatho wofikelelo.I-GPON isetyenziswa kuthungelwano lwe-FTTH.Ngenxa ye-bandwidth yayo ephezulu, ukhetho lwenkonzo eguquguqukayo, kunye nokufikelela ngokubanzi, i-GPON isanda kuba yiteknoloji yokuzikhethela.Ubuchule buthathwa njengomgangatho wegolide wokwandisa ukufikelela kuthungelwano lwebroadband.Ngokufanayo, i-2.5 Gbps inokufezekiswa kokubili phezulu nasezantsi.Kunokwenzeka ukufezekisa i-2.5Gbps ezantsi kunye ne-1.25Gbps isantya esiphezulu.
EPON Vs GPON yeyiphi omawuyithenge?
1) Imigangatho eyahlukeneyo yamkelwe yi-GPON kunye ne-EPON.I-GPON bubuchwepheshe obuphezulu kune-EPON kwaye inamandla okuxhasa abasebenzisi abaninzi kunye nokuthutha idatha.Ifomati yesakhelo se-ATM, ethathwe kwi-PONBPON ye-fiber optical ye-teknoloji yonxibelelwano, isetyenziswe yikhowudi yokuhambisa ikhowudi kwi-GPON.Ikhowudi ye-EPON yomjelo yifomati yesakhelo se-Ethernet, kwaye i-EPON's E imele i-Ethernet edibeneyo kuba ibibalulekile ekuqaleni ukuba i-EPON ikwazi ukudibana ngqo ne-Intanethi.Ukulungiselela ukuhanjiswa phezu kwefiber optical, ifomathi yesakhelo se-EPON ngokwemvelo iqulethwe ngaphandle kwesakhelo se-Ethernet ifomathi yesakhelo.
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Umgangatho we-IEEE 802.3ah ulawula i-EPON.Le yingcinga engundoqo emva komgangatho we-EPON we-IEEE: ukulinganisa i-EPON kangangoko kunokwenzeka ngaphakathi kwe-802.3 ye-architecture ngaphandle kokwandisa iprotocol ye-MAC ye-Ethernet eqhelekileyo kancinane kangangoko.
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I-GPON ichazwe kwi-ITU-TG.984 uluhlu lwemigangatho.Ukuze kugcinwe ukuqhubela phambili kwexesha le-8K, umgangatho we-GPON wokuziphendukela kwemvelo ubuyisela umva ukuhambelana neenkonzo ze-TDM ezikhoyo kunye nokugcina i-125ms isakhiwo sesakhelo esisisigxina.Ngenjongo yokuxhasa iiprothokholi ezininzi, kubandakanya i-ATM, iGPON ibonelela ngefomathi yephakheji yenoveli.I-GEM:GPONEncapsulaTIonMethod.Idatha ye-ATM inokudibaniswa kunye nedatha evela kwezinye iiprothokholi ngokubonga ngokuqulunqa.
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4) Kwiimeko zehlabathi lokwenyani, iGPON inika i-bandwidth eluncedo ngakumbi kune-EPON.Umthwali wayo wenkonzo usebenza ngakumbi, kwaye amandla ayo okwahlula anamandla.Imisebenzi enobunkunkqele yenziwe ukuba ibe nokwenzeka ngokukwazi ukudlulisa iinkonzo ezininzi ze-bandwidth, ukwandisa ukufikelela komsebenzisi, kunye nokuqwalasela iinkonzo ezininzi kunye neziqinisekiso ze-QoS.Oku kungenxa yokuba i-GPON ixabisa ngaphezu kwe-EPON, ngelixa umahluko phakathi kwezi zibini ziyancipha ngenxa yokusetyenziswa ngokubanzi kweteknoloji ye-GPON.
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Ngokubanzi, i-GPON igqwesa i-EPON ngokwemilinganiselo yokusebenza, kodwa i-EPON isebenza kakuhle kwaye iyafikeleleka.Kusenokwenzeka ukuba kwikamva lemarike yofikelelo lwebroadband, ukuhlalisana kunye nokukhawulelana kungabaluleke kakhulu kunokuthatha isigqibo sokuba ngubani oza kuthatha indawo.I-GPON ifaneleka ngakumbi kubathengi abane-bandwidth efunwayo, iinkonzo ezininzi, kunye neemfuno zokhuseleko kunye nabasebenzisa iteknoloji ye-ATM kwinethiwekhi yabo yomqolo.Kwicandelo lemarike elibandakanya abathengi abaxhalabileyo ngokuyintloko ngexabiso kwaye banenkxalabo encinci yokhuseleko, kubo i-EPON iye yavela njengephambili ecacileyo.Ke ngelixa ukuthenga ngokusekelwe kwiimfuno zomthengi unokugqiba ukuba yeyiphi na.