Kodi kusintha kotetezedwa kwa PON ndi chiyani?

Ndi kuchuluka kwa ntchito zomwe zimayendetsedwa ndi Passive Optical Networks (PON), kwakhala kofunika kwambiri kubwezeretsanso ntchito pambuyo pakulephereka kwa mizere. Ukadaulo wosinthira chitetezo wa PON, ngati njira yayikulu yowonetsetsa kuti bizinesi ikuyenda bwino, imathandizira kwambiri kudalirika kwa maukonde pochepetsa nthawi yosokoneza maukonde kukhala yosakwana 50ms kudzera munjira zanzeru zochepetsera ntchito.

Chofunika chaPONKusintha kwachitetezo ndikuwonetsetsa kuti bizinesi ikupitilirabe kudzera munjira ziwiri za "primary +backup".

Mayendedwe ake amagawidwa m'magawo atatu: choyamba, pozindikira, dongosololi limatha kuzindikira molondola kusweka kwa fiber kapena kulephera kwa zida mkati mwa 5ms mwa kuphatikiza kuwunika kwamphamvu kwamagetsi, kusanthula kwa zolakwika, ndi mauthenga amtima; Panthawi yosinthira, kusinthaku kumangoyambika kutengera njira yomwe idakonzedweratu, ndikuchedwa kosinthira komwe kumayendetsedwa mkati mwa 30ms; Pomaliza, mu gawo lobwezeretsa, kusamuka kosasunthika kwa magawo a bizinesi a 218 monga zoikamo za VLAN ndi kugawa kwa bandwidth kumatheka kudzera mu injini yolumikizirana, kuonetsetsa kuti ogwiritsa ntchito omaliza sakudziwa.

Deta yeniyeni yotumizira ikuwonetsa kuti mutatha kugwiritsa ntchito ukadaulo uwu, kusokoneza kwapachaka kwa ma network a PON kumatha kuchepetsedwa kuchokera ku maola 8.76 mpaka masekondi a 26, ndipo kudalirika kumatha kuwongolera nthawi za 1200. Njira zamakono zodzitetezera za PON zikuphatikiza mitundu inayi, Mtundu A mpaka Mtundu D, kupanga dongosolo laukadaulo lathunthu kuyambira pazoyambira mpaka zapamwamba.

Type A (Trunk Fiber Redundancy) imatengera mapangidwe a madoko apawiri a PON kumbali ya OLT kugawana tchipisi ta MAC. Imakhazikitsa ulalo woyambira ndi wosunga zobwezeretsera wa fiber optic kudzera pa 2: N splitter ndikusintha mkati mwa 40ms. Mtengo wake wosinthira ma Hardware umangowonjezeka ndi 20% yazinthu zamagetsi, zomwe zimapangitsa kuti zikhale zoyenera kwambiri pamayendedwe apatali ngati ma network amsukulu. Komabe, ziyenera kudziwidwa kuti dongosololi lili ndi malire pa bolodi lomwelo, ndipo kulephera kwa mfundo imodzi ya splitter kungayambitse kusokonezeka kwapawiri.

Mtundu wotsogola kwambiri wa B (OLT port redundancy) umayika ma doko awiri odziyimira pawokha a MAC tchipisi kumbali ya OLT, umathandizira kuzizira / kutentha kosungirako zosungirako, ndipo ukhoza kuwonjezeredwa ku zomanga zapawiri pa OLTs. MuFTTHMayesero a zochitika, yankholi linapindula kusamuka kwa 128 ONUs mkati mwa 50ms, ndi paketi yotayika ya 0. Yagwiritsidwa ntchito bwino pa mavidiyo a 4K owonetsera mavidiyo pawailesi yakanema ndi wailesi yakanema.

Mtundu wa C (chitetezo chokwanira cha fiber) umagwiritsidwa ntchito kupyolera msana / kugawidwa kwa fiber dual njira deployment, pamodzi ndi ONU dual optical module design, kuti apereke chitetezo chotsiriza cha machitidwe a malonda a zachuma. Idakwanitsa kuyambiranso zolakwika za 300ms pakuyesa kupsinjika kwa stock exchange, ndikukwaniritsa mulingo wocheperako wachiwiri wololera wamachitidwe azachitetezo.

Mtundu wapamwamba kwambiri wamtundu wa D (zosunga zobwezeretsera zonse) umatenga mapangidwe agulu lankhondo, okhala ndi maulamuliro apawiri komanso mapangidwe apandege apawiri a OLT ndi ONU, kumathandizira kusanjika kwa magawo atatu a fiber/port/power supply. Mlandu wotumizira ma network a 5G base station backhaul network ukuwonetsa kuti yankho limathabe kukhalabe ndikusintha kwa 10ms m'malo ovuta kwambiri a -40 ℃, ndi kusokoneza kwapachaka komwe kumayendetsedwa mkati mwa masekondi 32, ndipo yadutsa chiphaso chankhondo cha MIL-STD-810G.

Kuti mukwaniritse kusintha kosasinthika, zovuta zazikulu ziwiri zaukadaulo ziyenera kugonjetsedwa:

Pankhani yolumikizira masinthidwe, makinawa amatengera ukadaulo wophatikizira wosiyanasiyana kuti awonetsetse kuti magawo 218 osasunthika monga mfundo za VLAN ndi QoS zimagwirizana. Panthawi imodzimodziyo, imagwirizanitsa deta yosinthika monga tebulo la adiresi ya MAC ndi kubwereketsa kwa DHCP kupyolera mu makina obwereza mofulumira, ndipo mopanda malire amalandira makiyi otetezera kutengera njira yachinsinsi ya AES-256;

Mu gawo lobwezeretsa ntchito, njira yotsimikizira katatu idapangidwa - pogwiritsa ntchito njira yodziwira mwachangu kuti ipanikizike nthawi yolembetsa ya ONU mpaka mkati mwa masekondi atatu, njira yanzeru yamadzimadzi yozikidwa pa SDN kuti ikwaniritse dongosolo lolondola la magalimoto, ndikuwongolera zokha magawo osiyanasiyana monga mphamvu yamaso / kuchedwa.