Muyezo wa ieee802.3av umatanthawuza 10g/1g (uplink rate 10g/downlink rate 1g) asymmetric physical layer mode (amene apa amatchedwa 10g/1g asymmetric mode) ndi 10g/10g (uplink rate ndi downlink rate onse ndi 10g) symmetrical two A mawonekedwe osanjikiza (omwe akutchedwa 10g/10g symmetric mode):
Olt mu 10g / 1g osakhala awiriawiri amatha kukhala ogwirizana ndi onu mu 1g/1g symmetric mode ndi onu mu 10g/1g asymmetric mode.OLT mu 10g/10g symmetric mode ingakhale yogwirizana ndi onu mu 1g/1g mode, onu mu 10g/1g asymmetric mode, ndi onu mu 10g/10g symmetric mode.
The OLT mu symmetric mode ndi OLT mu asymmetric mode ndi chimodzimodzi mu downlink malangizo njira kuwala kwa wosanjikiza thupi, ndi 10g njira amagwiritsa 1577nm wavelength ndi 64b / 66b code encoding;kotero ziribe kanthu kaya onu ili mu symmetric mode kapena asymmetric mode, ikhoza Kulandira deta yotsika kuchokera ku olt.Olt nthawi ndi nthawi imaulutsa mpcpdsicoverygate (multi-point control protocol, multi-point control protocol) chimango.Gawo lazidziwitso zopezeka mu chimango limagwiritsidwa ntchito mwapadera kudziwitsa luso lazenera la uplink (1g, 10g, 1g + 10g dual rate), ndipo onu amatha kupeza olt kudzera munjira yomwe ikugwira ntchito pano.
The onu mu symmetric mode ndi asymmetric mode imagwirizana kwathunthu pa mac layer (media access control, medium access control layer), ndipo kusiyana pakati pawo kumakhazikika mu phy layer (physical layer, pansi wosanjikiza wa osi), ndi kutumiza magawo a phy layer kumadalira Ikani Optical module ya onu:
Pamene ma asymmetric optical module alowetsedwa mu onu (ndiko kuti, onu ndi asymmetric onu), popeza mlingo wa uplink wa asymmetric optical module ukukwera mpaka 1g, phy layer ya onu ikhoza kungosintha kuchuluka kwa 1g. kugwira ntchito mu asymmetric mode.Pamene symmetrical optical module imalowetsedwa mu onu, popeza kuchuluka kwa uplink kwa module ya kuwala kumafika ku 10g, onu akhoza kusintha mlingo wotumizira wa phy wosanjikiza ku 10g kuti agwire ntchito mofananamo, kapena kusintha mlingo wotumizira. phy layer mpaka 1g kuti igwire ntchito mu asymmetric mode.
Komabe, onu ndi olt omwe alipo adzakhala ndi zolakwika zotsatirazi network ikakonzedwa:
Pakukweza maukonde, OLT ikhoza kusinthana pakati pa symmetric mode ndi asymmetric mode, koma ONU siyingasinthe malinga ndi kutembenuka kwa OLT.Mwachitsanzo, OLT imasintha kuchoka ku symmetric mode kupita ku asymmetric mode, koma ONU ikadali mu symmetric mode.Panthawiyi, njira zakumapeto (olt) ndi zakutali (onu) sizikugwirizana.Kuzindikira zaukadaulo:
Poganizira zolakwika zomwe zidalipo muzojambula zam'mbuyomu, vuto laukadaulo lomwe lathetsedwa ndi zomwe zidapangidwa pano ndi izi: momwe mungapangire onu kusinthika molingana ndi kutembenuka kwa olt pomwe olt akuchita kutembenuka kwa symmetric mode / asymmetric mode;zomwe zidapangidwa pano zimazindikira kuphatikiza koyenera kwa olt ndi onu Adaptation, sipadzakhala kusagwirizana pakati pamayendedwe am'deralo ndi njira yakutali.
Kuti mukwaniritse cholinga chomwe chili pamwambapa, onu yoperekedwa ndi zomwe zidapangidwa pano zimagwirizana ndi 10g/10g symmetry ndi 10g/1g asymmetry, kuphatikiza izi:
Khwerero a: Pezani mtundu wa Optical module wa onu.Pamene optical module ndi symmetrical Optical module, dziwani momwe mungagwiritsire ntchito pano.Ngati njira yogwirira ntchito ya onu ndi yofanana, pitani ku sitepe b;ngati mawonekedwe a onu ndi asymmetrical mode, pitani ku sitepe c;
Khwerero b: Dziwani ngati chiwerengero cha chidziwitso chazenera choperekedwa ndi olt mu mawonekedwe a asymmetric chiri pamwamba pa malo omwe atchulidwa, ngati ndi choncho, sinthani njira yogwirira ntchito ya onu kuchokera kumayendedwe ofananira kupita ku asymmetrical mode, ndi kutha;mwinamwake, sungani njira yogwirira ntchito ya onu, ndi kutha;
Khwerero c: Dziwani ngati chiwerengero cha chidziwitso chazenera choperekedwa ndi olt mumayendedwe ofananira chili pamwamba pa malo omwe atchulidwa, ngati ndi choncho, sinthani njira yogwirira ntchito ya onu kuchoka ku asymmetric mode kupita ku symmetric mode, ndi mapeto;mwinamwake, sungani njira yogwirira ntchito ya onu, mapeto.
Pamaziko a yankho laukadaulo lomwe lili pamwambapa, njira yopezera mtundu wa mawonekedwe a onu omwe akufotokozedwa mu sitepe a ndi: pamene onu ayamba, pezani mtundu wa mawonekedwe a onu:
Ngati gawo la kuwala ndi asymmetric optical module, kuletsa ndondomekoyi ndi kutha;
Ngati optical module ndi symmetrical optical module, pamene onu akusintha kuchokera ku dziko lopanda kuwala kupita ku dziko loyenera, apezenso mtundu wa optical module wa onu, ngati optical module ndi symmetrical optical module, pitirizani ndondomekoyi. wa sitepe a;ngati gawo la kuwala ndi asymmetrical Optical module, kuletsa ndondomekoyi ndi kutha.
Onu yoperekedwa ndi zomwe zilipo panopa zimagwirizana ndi 10g / 10g symmetrical ndi 10g / 1g asymmetrical systems, kuphatikizapo onu detector module, symmetrical mode switching module, ndi asymmetrical mode switching module yokonzedwa pa onu;
Njira yodziwira onu imagwiritsidwa ntchito: kupeza mtundu wa mawonekedwe a onu, pamene gawo la optical ndi symmetrical optical module, dziwani momwe ntchito yogwirira ntchito ikugwirira ntchito, ngati njira yogwirira ntchito ya onu ndi yofanana, tumizani ma symmetrical mode kusintha siginecha ku symmetrical mode switching module;Ngati mawonekedwe ogwirira ntchito a onu ndi asymmetric mode, chizindikiro cha kusintha kwa asymmetric chimatumizidwa ku asymmetric mode switching module;
The symmetric mode switching module imagwiritsidwa ntchito: mutalandira symmetric mode switching siginecha, weruzani ngati kuchuluka kwa chidziwitso chazenera choperekedwa ndi olt mumayendedwe asymmetric kufika pachimake kapena ayi, ndipo ngati ndi choncho, sinthani mawonekedwe ogwirira ntchito a onu. kuchokera ku ma symmetric mode kupita ku asymmetric mode;Kupanda kutero sungani njira yogwirira ntchito ya onu;
The asymmetric mode switching module imagwiritsidwa ntchito: mutalandira asymmetric mode switching siginecha, weruzani ngati kuchuluka kwa chidziwitso chazenera chomwe chimatumizidwa ndi olt kupita ku symmetric mode chili pamwamba pazomwe zanenedwa, ndipo ngati ndi choncho, sinthani mawonekedwe ogwirira ntchito a onu kuchokera. mawonekedwe a asymmetric mpaka ma symmetric mode;Apo ayi, pitirizani kugwira ntchito.
Pamaziko a dongosolo laukadaulo lomwe latchulidwa pamwambapa, njira yopezera mtundu wa optical module ya onu mu gawo lodziwikiratu ndi: pamene onu ayamba, pezani mtundu wa optical module wa onu:
Ngati gawo la kuwala ndi asymmetric optical module, siyani kugwira ntchito;
Ngati optical module ndi symmetrical optical module, pamene onu akusintha kuchoka ku dziko lopanda kuwala kupita kumalo okhudzana, apezenso mtundu wa optical module wa onu, ngati optical module ndi symmetrical optical module, pitirizani ndondomekoyi. ya module yodziwira onu;ngati gawo la kuwala ndi gawo lopanda Symmetrical Optical, siyani kugwira ntchito.
Poyerekeza ndi zaluso zakale, zopangidwa pano zili ndi zabwino zake:
(1) Ponena za sitepe imodzi ya zomwe zapangidwa panopa, zikhoza kudziwika kuti zomwe zilipo panopa zapeza molondola mtundu wa onu;Pazifukwa izi, ponena za sitepe b ndi sitepe c ya kupangidwa kwamakono, zikhoza kuwoneka kuti zomwe zilipo panopa zimatha kuzindikira njira yogwiritsira ntchito ya olt, ndipo malinga ndi machitidwe a olt, kuti azolowere kusintha momwe ntchito ikugwirira ntchito. a onu, kuti muzindikire kusintha kwabwino pakati pa olt ndi onu, ndipo sipadzakhala kusagwirizana pakati pa mapeto a m'deralo ndi njira yotsiriza yakutali muzojambula zam'mbuyo.
(2) Ponena za sitepe yoyamba ya zomwe zapezedwa pano, zitha kuwoneka kuti ngati zomwe zidapangidwa pano zikuwonetsa kuti mtundu wa onu ndi asymmetric onu, ndiye kuti, onu amangogwira ntchito mosiyanasiyana, komanso onu amatha kutengera mawonekedwe a 10g / 10g ofananira, ndipo kutsata sikuchitika panthawiyi (chifukwa onu sangathe kusintha njira zogwirira ntchito), potero amachepetsa ndalama zogwirira ntchito ndikuwongolera magwiridwe antchito.
(3) Ponena za sitepe yoyamba ya zomwe zapangidwa panopa, zikhoza kuwoneka kuti zomwe zilipo panopa zikuyenera kuzindikira mtundu wa optical module ya onu pamene onu ayamba komanso pamene onu asintha kuchoka kumdima kupita ku kuwala. , ndi zomwe tazitchula pamwambapa za 2 zimatha kuzindikira chikhalidwe choyambirira cha onu Mtundu wa optical module (kuzindikira poyambira), komanso ngati mawonekedwe a optical asinthidwa (kuzindikira pamene akusintha kuchoka ku dziko lopanda kuwala kupita ku kuwala) ;Choncho, zomwe zilipo panopa zingathe kusintha molondola machitidwe ogwirira ntchito motsatira mtundu wa onu's optical module , kuti atsimikizire kuti ntchitoyo ndi yolondola.
Nthawi yotumiza: Jun-05-2023