Ngokuthuthuka komnotho kanye nenqubekela phambili yenhlalo, abantu baya ngokuya bebuthana esidlangalaleni. Ngesikhathi esifanayo, amacala alimazayo okuphepha komphakathi nawo aletha izinselele ezinzima emphakathini onokuzwana. Amakhamera kanye nohlelo lokuqapha lunganikeza ukuqapha kwevidiyo ngesikhathi sangempela nemisebenzi yokuqoshwa kwevidiyo, okuhlinzeka ngesisekelo esibalulekile sokuqoqwa kobufakazi bangemva kobufakazi.Ukuthuthukiswa okusheshayo kwamakhamera kanye nohlelo lokuqapha kunikeza izindlela ezisebenzayo zokwakhiwa “kwedolobha elivumelanayo”.Idatha eqoqwe kusuka amaphuzu okuqoqwa kwezithombe asatshalaliswa kumakhamera kanye nohlelo lokuqapha adinga ukudluliselwa kuseva ngesikhathi sangempela ukuze kubukwe, kuhlaziywe futhi kufinyezwe.Inethiwekhi yokufinyelela kokudluliswa kwedatha iyindawo enzima ekwakhiweni kokuqapha kwedolobha kanye nohlelo lwenethiwekhi ye-alamu, kanye nendima ebalulekile Uhlelo lokudluliswa kwedatha luya ngokuya lugqama. I-EPON, enganikeza ukufinyelela okuphezulu komkhawulokudonsa, isiphenduke ubuchwepheshe obubalulekile ukusetshenziswa kwayo kwezohwebo ngezinga elikhulu okuthembele kubo.
Ngokuthuthukiswa kobuchwepheshe bezokuxhumana, ubuchwepheshe be-EPON buye bethulwa kancane kancane emkhakheni wokuqapha ukuphepha. Iwubuchwepheshe bokufinyelela komkhawulokudonsa wesakhiwo senethiwekhi ye-point-to-multipoint kanye nemodi yokudlulisa i-fiber optical passive.
Njengamanje, izinzuzo zobuchwepheshe be-EPON zibonakala kancane kancane, ikakhulukazi kumakhamera kanye nesicelo sokuqapha. Uma i-EPON isetshenziswa kumodi yenethiwekhi yokuqapha, inganikeza ukudlala okugcwele ezinzuzweni zayo zomkhawulokudonsa ophezulu ngenkathi ixazulula ukudluliswa kwedatha yevidiyo eyisisekelo ngezindleko eziphansi, futhi izici zayo ezilula nezivumelana nezimo zinganciphisa kakhulu izindleko zizonke kanye nezindleko zokugcinwa kwenethiwekhi. .
Inethiwekhi ye-EPON inezinzuzo ezilandelayo:
1.Ukuthembeka okuphezulu. I-EPON iyisihlukanisi nefiber optical. Inempilo ende yesevisi futhi ayikho imishini esebenzayo. Igwema ukwehluleka kwamandla, ukushaywa kombani, ukulimala kwe-overcurrent kanye ne-overvoltage, njll. Inethiwekhi inokwethenjelwa okuphezulu futhi inciphisa izindleko zokulungisa.
2.izindleko eziphansi. Ubuchwepheshe be-EPON bokudluliswa kwefayibha ye-single-core, yonga uhhafu wefayibha kunokudluliswa kwefayibha evamile. Ngaphezu kwalokho, i-EPON ayidingi ukunikezwa kwamandla kwangaphandle ngesikhathi sokudlulisa, kulula ukubeka, futhi ngokuyisisekelo ayidingi ukulungiswa, okungasindisa izindleko zokusebenza nezindleko zokuphatha.
I-3.Umkhawulokudonsa ophezulu.1Gmps izinga lokudluliswa kwe-symmetric, lingahlangabezana kalula nezidingo ezithwalayo zezinsizakalo zokubhekwa kwevidiyo. I-bandwidth ngayinyeI-ONUingashintshwa ngamandla phakathi kwe-2M ne-1Gmps. Isilinganiso somkhawulokudonsa okhuphukayo womfula we-OLTport ngayinyeI-ONUcishe i-30M, ehlangabezana ngokugcwele nezidingo ze-IPTV.
I-4.EPON inokusebenza kwezindleko eziphezulu futhi isivinini se-EPON singafinyelela kumkhawulokudonsa ophezulu ofanayo wokukhuphuka nomfula ophansi we-1.25Gb/s. ukumbozwa kwenethiwekhi yendawo yedolobha elikhulu, futhi ngokuyisisekelo ihlanganisa ububanzi bendawo enosayizi omaphakathi.
5.Inethiwekhi iyavumelana nezimo, futhi isilinganiso esiphezulu sokuhlukaniswa kwe-optical ngu-1:64. Isakhiwo senethiwekhi esimise okwesihlahla samukelwa ukuze sakhe i-topology yenethiwekhi yomsebenzisi iphuzu-kuya-ku-multipoint ngokusebenzisa inhlanganisela yezihlukanisi ze-optical ezihlukene. Ngokuhlela nokuklama kwenethiwekhi okunengqondo, izinsiza ze-fiber zingalondolozwa kakhulu. Kuyisixazululo esihle senkinga yokuqoqwa kwezithombe nokuhlakazeka.
Isimiso se-EPON Technology
I-EPON(Ethernet Passive Optical Network)Inethiwekhi ye-Ethernet passive Optical iwumkhiqizo wenhlanganisela ephelele yobuchwepheshe be-Ethernet nobuchwepheshe be-PON.
Ukuze kuhlukaniswe amasignali endleleni yokudlulisela nokwamukela yabasebenzisi abaningi ngefayibha efanayo, kwamukelwa ubuchwepheshe obulandelayo bokuphindaphinda kabili kwamukelwa: ukusakaza kwedatha ye-downlink kusebenzisa ubuchwepheshe bokusakaza, futhi ukusakazwa kwedatha ye-uplink kusebenzisa ubuchwepheshe be-TDMA.
Isicelo se-EPON kumakhamera nokugadwa
Ubuchwepheshe be-EPON bubonakala ngomkhawulokudonsa ophezulu, ukuzinza okuphezulu kanye nokusetshenziswa okuphezulu kwezinsiza zomugqa. Lobu buchwepheshe bunezinzuzo zemvelo zokuqapha kwekhampasi.Okokuqala, ukuqapha kwekhampasi kudinga indawo yenethiwekhi yangasese enesivinini esikhulu, yekhwalithi ephezulu ukuze kuthwalwe izinsiza zayo zevidiyo ezisezingeni eliphezulu.Ubuchwepheshe be-EPON buhlinzeka ngomkhawulokudonsa we-1Gbps we-uplink nowe-downlink, ongahlangabezana ngokugcwele izidingo zamasevisi evidiyo.Okwesibili, isakhiwo se-EPON esishintshashintshayo se-topological sinakekela kakhulu ukwakheka kwepaki.Kungakhathaliseki ukuthi iqoqo lezakhiwo eziminyene noma umgwaqo ongekho, ingafakwa inethiwekhi efanele.Ekugcineni, ukuvikeleka okuphezulu nokuzinza. ye-EPON iphinde iphakamise izinga lobuchwepheshe bokufinyelela lokuqapha ipaki liye ezingeni elisha.
Uma izindawo zokuqapha eziminyana kakhulu zidingeka phakathi nendawo yepaki, i-EPON ingakwazi ukusebenzisa inethiwekhi evamile. Imbobo eyodwa ye-PON yeOLTokokusebenza kuxhunywe ne-1: N spectrometer. Ngemva kokufinyelela i-front-end optical node, multipleI-ONUamadivaysi axhunyiwe.Sebenzisa ngokugcwele ubude bokudluliswa kwe-fiber optical, okudlulela kuso sonke isidingo okufanele sisetshenziswe endaweni.I-spare fiber ingagcinelwa ukufinyelela ekunwetshweni kamuva.
Ukuqapha imigwaqo ezungezile kungenziwa ngendlela emazombezombe ukuze kuxhunywe izindawo zokuqapha umgwaqo ngochungechunge.Ezindaweni ezincane zesifunda, i-EPON enobude obusebenzayo obungu-20KM inganikeza ukufinyelela. Endaweni enkulu, izindlela eziningi zingasetshenziswa ukuxazulula inkinga yebanga.