Ngophuhliso loqoqosho kunye nenkqubela phambili yentlalo, abantu bahlanganisana ngakumbi nangakumbi esidlangalaleni.Kwangaxeshanye, amatyala okonakalisa ukhuseleko loluntu nawo azisa ucelomngeni olunzima kuluntu olunemvisiswano.Iikhamera kunye nenkqubo yokuHlola inokubonelela ngexesha langempela lokubeka iliso levidiyo kunye nemisebenzi yokurekhoda kwevidiyo, ukubonelela ngesiseko esibalulekileyo sokuqokelela emva kobungqina.Uphuhliso olukhawulezayo lweeKhamera kunye nenkqubo yokuHlola ibonelela ngeendlela ezisebenzayo zokwakha "isixeko esivumelanayo". Amanqaku okuqokelela umfanekiso asasazwa kwiiKhamera kunye nenkqubo yokuHlola kufuneka idluliselwe kumncedisi ngexesha langempela lokujonga, ukuhlalutya kunye nesishwankathelo.Inethiwekhi yokufikelela kwidatha yinto enzima ekwakhiweni kwenkqubo yokubeka iliso edolophini kunye ne-alarm network, kunye nendima ebalulekileyo iskim sothumelo lwedatha siya sibonakala sivela.I-EPON, enokubonelela ngokufikelela kwi-bandwidth ephezulu, ibe yitekhnoloji ebalulekileyo apho ukusetyenziswa kwayo kwezorhwebo kuxhomekeke kuyo.
Ngophuhliso lwetekhnoloji yonxibelelwano, itekhnoloji ye-EPON iye yangeniswa ngokuthe ngcembe kwindawo yokubeka iliso yokhuseleko.Bubuchwephesha bokufikelela kwi-bandwidth ye-point-to-multipoint network structure kunye ne-passive optical fiber transmission mode.
Okwangoku, izibonelelo zetekhnoloji ye-EPON zibonakaliswa ngokuthe ngcembe, ngakumbi kwiiKhamera kunye nesicelo sokuLapha.Xa i-EPON isetyenziselwa imowudi yenethiwekhi yokubeka iliso, inokunika umdlalo opheleleyo kwiinzuzo zayo ze-bandwidth ephezulu ngelixa isombulula ukuhanjiswa kwedatha yevidiyo esisiseko ngexabiso eliphantsi, kwaye iimpawu zayo ezilula kunye neziguquguqukayo zinokunciphisa kakhulu iindleko ezipheleleyo kunye nokugcinwa kweendleko zenethiwekhi. .
Uthungelwano lweEPON lunezi ncedo zilandelayo:
1.Ukuthembeka okuphezulu.I-EPON yi-splitter kunye nefiber optical.Inobomi benkonzo ende kwaye akukho zixhobo ezisebenzayo.Ithintela ukungaphumeleli kombane, ukubetha kombane, umonakalo ogqithiseleyo kunye nokugqithisa, njl. Inethiwekhi inokuthembeka okuphezulu kwaye inciphisa iindleko zokugcinwa.
2.ixabiso eliphantsi.Itekhnoloji ye-EPON yokuhanjiswa kwefayibha enye, ukonga isiqingatha sefayibha kunokuhanjiswa kwefayibha eqhelekileyo.Ukongezelela, i-EPON ayifuni ukunikezelwa kwamandla angaphandle ngexesha lokuhanjiswa, kulula ukuyibeka, kwaye ngokusisiseko ayifuni ukugcinwa, okunokugcina iindleko zokusebenza kunye neendleko zokulawula.
I-3.I-bandwidth ephezulu.1Gmps ye-symmetric transmission rate, inokuhlangabezana ngokulula neemfuno zokuthwala iinkonzo zevidiyo zokucupha.I-bandwidth ye-ONU nganye inokuhlengahlengiswa ngamandla phakathi kwe-2M kunye ne-1Gmps.Umyinge we-bandwidth enyukayo ye-OLT port kwi-ONU nganye malunga ne-30M, ehlangabezana ngokupheleleyo neemfuno ze-IPTV.
I-4.EPON ineendleko eziphezulu zokusebenza kunye nesantya se-EPON sinokufikelela kwi-bandwidth efanayo ephezulu kunye nezantsi kwe-1.25Gb / s. Isantya esiphezulu sinokufikelela kwi-10Gb / s, umgama ophezulu wokuhambisa unokufikelela kwi-20km, efanelekileyo kakhulu Ukugqunywa kothungelwano lwengingqi yemetropolitan, kwaye ngokusisiseko ibandakanya uluhlu lwendawo enobungakanani obuphakathi.
I-5.I-networking iyaguquguquka, kwaye i-optical split ratio ephezulu yi-1:64.Ubume bothungelwano obubume bomthi bamkelwa ukwenza i-point-to-multipoint user network topology ngokudityaniswa kwe-splitter ezahlukeneyo zamehlo.Ngokucwangciswa kothungelwano olufanelekileyo kunye noyilo, izibonelelo zefiber zinokugcinwa ngokupheleleyo.Isisombululo esihle kwingxaki yokuqokelela imifanekiso kunye nokusabalalisa.
Umgaqo weTekhnoloji weEPON
I-EPON (i-Ethernet Passive Optical Network) Inethiwekhi ye-Ethernet passive Optical yimveliso yendibaniselwano egqibeleleyo yetekhnoloji ye-Ethernet kunye nobuchwepheshe bePON.
Ukuze ukwahlula imiqondiso kwi-transmission kunye ne-reception direction yabasebenzisi abaninzi kwifayibha enye, ezi teknoloji zimbini zokuphindaphinda ziyamkelwa: i-downlink data stream ithatha iteknoloji yosasazo, kwaye i-uplink data stream ithatha iteknoloji ye-TDMA.
Isicelo se-EPON kwiiKhamera kunye nokucupha
Itekhnoloji ye-EPON ibonakaliswe nge-bandwidth ephezulu, ukuzinza okuphezulu kunye nokusetyenziswa okuphezulu kwemithombo yomgca.Le teknoloji ineenzuzo zayo zendalo zokubeka iliso kwikhampasi.Okokuqala, ukubeka iliso kwikhampasi kufuna isantya esiphezulu, umgangatho ophezulu wendawo yenethiwekhi yabucala ukuthwala iinkonzo zayo zevidiyo ezikumgangatho ophezulu.Iteknoloji yeEPON ibonelela nge-uplink kunye ne-downlink symmetric 1Gbps bandwidth, ekwazi ukuhlangabezana ngokupheleleyo iimfuno zeenkonzo zevidiyo.Okwesibini, ulwakhiwo lwe-EPON oluguquguqukayo lwe-topological luthatha unonophelo loyilo oluthe saa lwepaki.Inokuba liqela elixineneyo lezakhiwo okanye indlela egqagqeneyo, inokufakwa kuthungelwano olufanelekileyo.Ekugqibeleni, ukhuseleko oluphezulu kunye nokuzinza. ye-EPON ikwaphakamisa inqanaba lofikelelo lobuchwephesha bokubeka iliso kwipaki ukuya kwinqanaba elitsha.
Xa iindawo zokubeka iliso ezinoxinano oluphezulu zifuneka embindini wepaki, i-EPON inokusebenzisa uthungelwano oluqhelekileyo.Izibuko elinye lePON lezixhobo zeOLT liqhagamshelwe nge-1: N spectrometer.Emva kokufikelela kwi-front-end optical node, izixhobo ezininzi ze-ONU zixhunyiwe.Thatha ngokugcwele ubude bokuhanjiswa kwe-fiber optical, ukwandisa kuyo yonke imfuno yokuthunyelwa kwindawo.I-fiber egciniweyo ingagcinelwa ukufikelela emva kokwandisa.
Ukubeka iliso kwiindlela ezijikelezileyo kunokwenziwa ngendlela ejikelezayo ukudibanisa iindawo zokubeka iliso zendlela kwi-series.Kwindawo encinci yengingqi, i-EPON enobude obusebenzayo be-20KM inokubonelela ngokufikelela.Kwindawo enkulu, iindlela ezininzi zingasetyenziselwa ukusombulula ingxaki yomgama.