Hauv kev ua haujlwm ntawm kev sib txuas lus dav dav, ob lub thev naus laus zis tseem ceeb tau dhau los ua cov neeg sib tw tseem ceeb hauv kev muab kev pabcuam Internet ceev: EPON thiab GPON. Thaum ob qho tib si muaj kev ua haujlwm zoo sib xws, lawv muaj qhov sib txawv uas tsim nyog tshawb nrhiav kom nkag siab lawv lub peev xwm thiab txiav txim siab seb qhov twg zoo tshaj plaws rau koj cov kev xav tau.
EPON (Ethernet Passive Optical Network) thiab GPON (Gigabit Passive Optical Network), ob qho tib si nrov ntawm kev faib cov kev sib txuas hauv Is Taws Nem ceev rau cov neeg siv siv tshuab fiber ntau optic. Lawv yog ib feem ntawm Passive Optical Network (PON) tsev neeg ntawm technologies; Txawm li cas los xij, lawv txawv hauv architecture thiab functionality.
Qhov sib txawv tseem ceeb ntawm EPON thiab GPON yog lawv cov kev tswj hwm kev tshaj tawm xov xwm (MAC) txheej. EPON siv Ethernet, tib lub thev naus laus zis siv hauv cheeb tsam hauv cheeb tsam (LAN) thiab thaj chaw dav dav (WAN). Los ntawm kev siv Ethernet, EPON muab kev sib raug zoo nrog Ethernet-based systems uas twb muaj lawm, ua rau nws muaj kev xaiv yooj yim heev rau cov tswv lag luam.GPON, ntawm qhov tod tes, siv Asynchronous Transfer Mode (ATM) thev naus laus zis, ib qho qub tab sis tseem siv cov ntaub ntawv xa mus. Qhov kom zoo dua ntawm kev siv ATM hauv GPON network yog tias nws tuaj yeem muab kev pabcuam ua si triple (lub suab, video thiab cov ntaub ntawv) ntawm kev sib faib multiplexing platform, yog li ua kom muaj txiaj ntsig zoo ntawm kev siv bandwidth.
Lwm qhov sib txawv tseem ceeb yog qhov kev sib kis hauv qab thiab sab saud. EPON feem ntau muaj qhov sib luag nrawm, lub ntsiab lus rub tawm thiab rub tawm nrawm yog tib yam. Hauv qhov sib piv, GPON siv qhov kev teeb tsa asymmetric uas tso cai rau kev nrawm dua qis dua thiab qis qis qis dua. Cov yam ntxwv no ua rau GPON zoo tagnrho rau cov ntawv thov uas xav tau kev rub tawm sai dua, xws li video streaming thiab hloov ntaub ntawv loj. Hauv qhov sib piv, EPON's symmetrical speeds ua rau nws tsim nyog rau cov ntawv thov uas vam khom ntau ntawm cov ntaub ntawv sib kis, xws li kev sib tham video thiab kev pabcuam huab.
Txawm hais tias ob qho tib si EPON thiab GPON txhawb nqa tib qhov kev tsim kho fiber ntau, lawv cov OLT (Optical Line Terminal) thiab ONT (Optical Network Terminal) technologies txawv. GPON tuaj yeem txhawb nqa ntau ONTs ib OLT, ua rau nws xaiv thawj zaug thaum scalability muaj kev txhawj xeeb. EPON, ntawm qhov tod tes, muaj ntau qhov ntev, tso cai rau cov neeg ua haujlwm sib txuas txuas ntxiv los ntawm lub chaw haujlwm hauv nruab nrab lossis qhov chaw faib khoom. Qhov no ua rau EPON muaj txiaj ntsig zoo rau kev npog thaj chaw loj.
Los ntawm tus nqi saib, EPON thiab GPON sib txawv ntawm cov nqi pib pib. Vim nws ATM-based architecture, GPON xav tau cov cuab yeej siv ntau dua thiab kim. Hauv qhov sib piv, EPON siv Ethernet thev naus laus zis, uas yog siv dav thiab pheej yig. Txawm li cas los xij, nws tsim nyog sau cia tias thaum thev naus laus zis txhim kho thiab ntau tus neeg muag khoom nkag mus rau hauv kev ua lag luam, tus nqi sib txawv ntawm ob txoj kev xaiv tau maj mam nqaim.
Hauv cov ntsiab lus, ob qho tib si EPON thiab GPON yog cov kev xaiv siv tau los muab kev sib txuas hauv Internet ceev. EPON kev sib raug zoo nrog Ethernet thiab symmetrical speeds ua rau nws txaus nyiam rau kev lag luam thiab cov ntawv thov hauv tsev uas xav tau cov ntaub ntawv sib npaug. Ntawm qhov tod tes, GPON kev siv ATM thiab asymmetric speeds ua rau nws yog thawj qhov kev xaiv rau cov ntawv thov uas xav tau kev rub tawm nrawm dua. Kev nkag siab txog qhov sib txawv ntawm EPON thiab GPON yuav pab cov neeg ua haujlwm hauv network thiab cov neeg siv kawg ua kev txiav txim siab thaum xaiv cov cuab yeej uas zoo tshaj plaws rau lawv cov kev xav tau tshwj xeeb.
Post lub sij hawm: Oct-19-2023