1. XGS-PON yog dab tsi?
Ob leegXG-PONthiab XGS-PON koom nrogGPONseries. Los ntawm daim ntawv qhia kev siv tshuab, XGS-PON yog qhov kev hloov pauv ntawm thev naus laus zis ntawm XG-PON.
Ob leeg XG-PON thiab XGS-PON yog 10G PON, qhov sib txawv tseem ceeb yog: XG-PON yog ib qho PON asymmetric, tus nqi uplink/downlink ntawm qhov chaw nres nkoj PON yog 2.5G/10G; XGS-PON yog ib qho PON symmetric, tus nqi uplink/downlink ntawm qhov chaw nres nkoj PON Tus nqi yog 10G/10G.
Cov thev naus laus zis PON tseem ceeb uas siv tam sim no yog GPON thiab XG-PON, ob qho tib si yog asymmetric PON. Vim tias cov ntaub ntawv upstream / downlink ntawm tus neeg siv feem ntau yog asymmetrical, coj ib lub nroog thawj-tier ua piv txwv, qhov nruab nrab ntawm cov tsheb khiav upstream ntawm OLT tsuas yog 22% ntawm cov tsheb khiav downstream. Yog li ntawd, cov yam ntxwv ntawm asymmetric PON yog qhov tseem ceeb rau cov kev xav tau ntawm cov neeg siv. phim. Qhov tseem ceeb dua, tus nqi uplink ntawm asymmetric PON qis, tus nqi xa cov khoom xws li lasers hauv ONU qis, thiab tus nqi khoom siv qis.
Txawm li cas los xij, cov neeg siv xav tau ntau yam. Nrog rau kev nce ntxiv ntawm kev tshaj tawm nyob thiab kev saib xyuas video, muaj ntau thiab ntau qhov xwm txheej uas cov neeg siv them sai sai rau uplink bandwidth. Cov kab tshwj xeeb hauv inbound yuav tsum muab cov voj voog uplink / downlink symmetrical. Cov lag luam no txhawb nqa qhov kev thov rau XGS-PON.
2. Kev sib koom ua ke ntawm XGS-PON, XG-PON thiab GPON
XGS-PON yog kev hloov pauv thev naus laus zis ntawm GPON thiab XG-PON, thiab txhawb kev nkag mus rau peb hom ONUs sib xyaw: GPON, XG-PON thiab XGS-PON.
2.1 Kev sib koom ua ke ntawm XGS-PON thiab XG-PON
Ib yam li XG-PON, qhov downlink ntawm XGS-PON siv txoj kev tshaj tawm, thiab qhov uplink siv txoj kev TDMA.
Vim tias qhov wavelength thiab tus nqi ntawm XGS-PON thiab XG-PON zoo ib yam, qhov downstream ntawm XGS-PON tsis paub qhov txawv ntawm XGS-PON ONU thiab XG-PON ONU, thiab lub optical splitter tshaj tawm cov teeb liab optical downstream mus rau tib qhov txuas ODN. Rau txhua XG(S)-PON (XG-PON thiab XGS-PON) ONU, txhua ONU xaiv kom tau txais nws tus kheej lub teeb liab thiab pov tseg lwm cov teeb liab.
Qhov uplink ntawm XGS-PON ua cov ntaub ntawv xa mus raws li lub sijhawm, thiab ONU xa cov ntaub ntawv hauv lub sijhawm uas OLT tso cai. OLT faib cov sijhawm raws li qhov xav tau ntawm cov tsheb khiav ntawm ONU sib txawv thiab hom ONU (nws puas yog XG-PON lossis XGS-PON?). Hauv lub sijhawm uas muab rau XG-PON ONU, tus nqi xa cov ntaub ntawv yog 2.5Gbps; hauv lub sijhawm uas muab rau XGS-PON ONU, tus nqi xa cov ntaub ntawv yog 10Gbps.
Nws tuaj yeem pom tias XGS-PON ib txwm txhawb nqa kev nkag mus sib xyaw nrog ob hom ONUs, XG-PON thiab XGS-PON.
2.2 Kev sib koom ua ke ntawm XGS-PON thiabGPON
Vim tias qhov wavelength ntawm uplink/downlink txawv ntawm GPON, XGS-PON siv Combo solution los sib qhia ODN nrog GPON. Rau lub hauv paus ntsiab lus ntawm Combo solution, saib tsab xov xwm "Kev Sib Tham Txog Kev Dais Teeb Meem Los Txhim Kho XG-PON Resource Utilization ntawm Combo Subscriber Board".
Lub Combo optical module ntawm XGS-PON sib xyaw ua ke GPON optical module, XGS-PON optical module thiab WDM multiplexer.
Hauv qhov kev taw qhia upstream, tom qab lub teeb liab optical nkag mus rau hauv XGS-PON Combo port, WDM lim cov teeb liab GPON thiab XGS-PON teeb liab raws li qhov wavelength, thiab tom qab ntawd xa cov teeb liab mus rau ntau txoj kev sib txawv.
Hauv qhov kev taw qhia downlink, cov teeb liab los ntawm GPON channel thiab XGS-PON channel yog multiplexed los ntawm WDM, thiab cov teeb liab sib xyaw yog downlinked rau ONU los ntawm ODN. Vim tias cov wavelengths sib txawv, ntau hom ONUs xaiv cov wavelengths xav tau los txais cov teeb liab los ntawm cov lim dej sab hauv.
Vim tias XGS-PON txhawb nqa kev sib koom ua ke nrog XG-PON, Combo solution ntawm XGS-PON txhawb nqa kev nkag mus sib xyaw ntawm GPON, XG-PON thiab XGS-PON peb hom ONUs. Lub Combo optical module ntawm XGS-PON tseem hu ua peb hom Combo optical module (XG-PON's Combo optical module hu ua ob hom Combo optical module vim nws txhawb nqa kev nkag mus sib xyaw ntawm GPON thiab XG-PON ob hom ONUs).
3. Xwm txheej ntawm kev ua lag luam
Vim yog tus nqi khoom siv thiab lub sijhawm khoom siv tas mus li, tus nqi khoom siv tam sim no ntawm XGS-PON siab dua li ntawm XG-PON. Ntawm lawv, tus nqi ib chav ntawm OLT (xws li Combo user board) siab dua li 20%, thiab tus nqi ib chav ntawm ONU siab dua ntau dua 50%.
Txawm hais tias cov kab tshwj xeeb uas nkag mus rau hauv yuav tsum muaj cov voj voog uplink/downlink symmetrical, qhov tseeb ntawm feem ntau cov kab tshwj xeeb uas nkag mus rau hauv tseem raug tswj hwm los ntawm cov cwj pwm hauv qab no. Txawm hais tias muaj ntau thiab ntau qhov xwm txheej uas cov neeg siv them sai sai rau uplink bandwidth, yuav luag tsis muaj qhov xwm txheej ntawm cov kev pabcuam uas tsis tuaj yeem nkag mus los ntawm XG-PON tab sis yuav tsum nkag mus los ntawm XGS-PON.
Lub sijhawm tshaj tawm: Plaub Hlis-12-2023