Umgangatho we-ieee802.3av uchaza i-10g/1g (izinga lokuphakama liyi-10g/izinga lokwehla liyi-1g) imo ye-asymmetric physical layer (ebizwa ngokuba yi-10g/1g asymmetric mode) kunye ne-10g/10g (izinga lokuphakama liyi-10g kunye nezinga lokwehla zi-10g) zombini zi-symmetric two. Umaleko womzimba (ebizwa ngokuba yi-10g/10g symmetric mode):
I-olt kwimo ye-non-pair ye-10g/1g ingahambelana ne-onu kwimo ye-symmetric ye-1g/1g kunye ne-onu kwimo ye-asymmetric ye-10g/1g. I-OLT kwimo ye-symmetric ye-10g/10g ingahambelana ne-onu kwimo ye-1g/1g, i-onu kwimo ye-asymmetric ye-10g/1g, kunye ne-onu kwimo ye-symmetric ye-10g/10g.
I-OLT kwimo yokulinganisa kunye ne-OLT kwimo yokungalingani ziyafana kwicala le-downlink lendlela ye-optical yomaleko obonakalayo, kwaye itshaneli ye-10g isebenzisa ubude be-1577nm kunye nekhowudi ye-64b/66b; ngoko ke nokuba i-onu ikwimo yokulinganisa okanye imo yokungalingani, ingafumana idatha ye-downlink evela kwi-olt. I-olt iya kusasaza rhoqo ifreyimu ye-mpcpdsicoverygate (iprotocol yolawulo lwamanqaku amaninzi, iprotocol yolawulo lwamanqaku amaninzi). Intsimi yolwazi lokufumanisa kwifreyimu isetyenziselwa ngokukodwa ukwazisa amandla e-uplink window (1g, 10g, 1g+10g dual rate), kwaye i-onu inokufumana i-olt ngale ndlela yokusebenza yangoku yefreyimu.
I-onu kwimo ye-symmetric kunye nemo ye-asymmetric ihambelana ngokupheleleyo kwimaleko ye-mac (ulawulo lokufikelela kwimidiya, umaleko wolawulo lokufikelela oluphakathi), kwaye umahluko phakathi kwazo ugxile kwimaleko ye-phy (umaleko ongokoqobo, umaleko osezantsi we-osi), kwaye iiparameter zokuthumela zomaleko we-phy zixhomekeke kwi-Insert the optical module ye-onu:
Xa imodyuli ye-optical engalinganiyo ifakwa kwi-onu (oko kukuthi, i-onu yi-onu engalinganiyo), ekubeni izinga lokunyuka kwemodyuli ye-optical engalinganiyo lifikelela kwi-1g, umaleko we-phy we-onu unokumisela kuphela izinga lokudlulisela le-1g ukuze lisebenze kwimo ye-asymmetric. Xa imodyuli ye-optical engalinganiyo ifakwa kwi-onu, ekubeni izinga lokunyuka kwemodyuli ye-optical lifikelela kwi-10g, i-onu inokumisela izinga lokuthumela le-phy malear ukuya kwi-10g ukuze isebenze kwimo ye-symmetric, okanye imisele izinga lokuthumela le-phy malear ukuya kwi-1g ukuze isebenze kwimo ye-asymmetric.
Nangona kunjalo, i-onu kunye ne-olt ezikhoyo ziya kuba neziphene ezilandelayo xa inethiwekhi iphuculwe:
Ngexesha lokuphuculwa kwenethiwekhi, i-OLT ingatshintsha phakathi kwendlela yokulinganisa kunye nendlela yokungalingani, kodwa i-ONU ayinakutshintsha ngokwendlela yokuguqulwa kwe-OLT. Umzekelo, i-OLT itshintsha ukusuka kwindlela yokulinganisa ukuya kwindlela yokungalingani, kodwa i-ONU isekwindlela yokulinganisa. Okwangoku, iindlela zesiphelo sendawo (olt) kunye neendlela zesiphelo esikude (onu) azifani.Izinto zokuqonda zobugcisa:
Ijonge kwiimpazamo ezikhoyo kubugcisa bangaphambili, ingxaki yobugcisa esonjululwe yile ntshayelelo yangoku yile: indlela yokwenza i-onu iguquke ngokuhambelanayo ngokwendlela yokuguqula ye-olt xa i-olt iguqula indlela yokulinganisa/indlela yokungalingani; le ntshayelelo yangoku ifezekisa indibaniselwano egqibeleleyo ye-olt kunye ne-onu Adaptation, akuyi kubakho mahluko phakathi kwendlela yokuphela yendawo kunye nendlela yokuphela ekude.
Ukuze kufezekiswe le njongo ingasentla, i-onu enikwe yile ntshayelelo ihambelana nokulingana kwe-10g/10g kunye nokungalingani kwe-10g/1g, kuquka la manyathelo alandelayo:
Inyathelo a: Fumana uhlobo lwemodyuli ye-optical ye-onu. Xa imodyuli ye-optical iyimodyuli ye-optical elinganayo, misela indlela yokusebenza yangoku ye-onu. Ukuba indlela yokusebenza ye-onu ikwimo yokulinganisa, yiya kwinyathelo b; ukuba indlela yokusebenza ye-onu yimo yokungalingani, yiya kwinyathelo c;
Inyathelo b: Qinisekisa ukuba inani lolwazi lwefestile olukhutshwe yi-olt kwimo ye-asymmetric lingaphezulu komda ochaziweyo, ukuba kunjalo, tshintsha imo yokusebenza ye-onu ukusuka kwimo ye-symmetric ukuya kwimo ye-asymmetrical, uze uphele; kungenjalo, gcina imo yokusebenza ye-onu, uze uphele;
Inyathelo c: Qinisekisa ukuba inani lolwazi lwefestile olukhutshwe yi-olt kwimo yokulinganisa lingaphezulu komda ochaziweyo, ukuba kunjalo, tshintsha imo yokusebenza ye-onu ukusuka kwimo yokungalingani ukuya kwimo yokulinganisa, kwaye uphele; kungenjalo, gcina imo yokusebenza ye-onu, end.
Ngokusekelwe kwisisombululo sobugcisa esingentla, inkqubo yokufumana uhlobo lwemodyuli ye-optical ye-onu echazwe kwinyathelo a yile: xa i-onu iqala, fumana uhlobo lwemodyuli ye-optical ye-onu:
Ukuba imodyuli yokukhanya yimodyuli yokukhanya engalinganiyo, yiphelise inkqubo uze uyiphelise;
Ukuba imodyuli yokukhanya yimodyuli yokukhanya elinganayo, xa i-onu itshintsha ukusuka kwimeko yokungakhanyi ukuya kwimeko efanelekileyo, phinda ufumane uhlobo lwemodyuli yokukhanya ye-onu, ukuba imodyuli yokukhanya yimodyuli yokukhanya elinganayo, qhubeka nenkqubo elandelayo yenyathelo a; ukuba imodyuli yokukhanya ayilingani, yiphelise inkqubo uze uyiphelise.
I-onu ebonelelwe yile ntshayelelo ihambelana neenkqubo ze-10g/10g ezilinganayo kunye ne-10g/1g ezingafaniyo, kubandakanya imodyuli yokufumanisa i-onu, imodyuli yokutshintsha imowudi elinganayo, kunye nemodyuli yokutshintsha imowudi engafaniyo ecwangciswe kwi-onu;
Imodyuli yokufumanisa i-onu isetyenziselwa: ukufumana uhlobo lwemodyuli yokukhanya ye-onu, xa imodyuli yokukhanya iyimodyuli yokukhanya elinganayo, ukumisela imo yokusebenza yangoku ye-onu, ukuba imo yokusebenza ye-onu yimo yokulinganisa, thumela isignali yokutshintsha imo elinganayo kwimodyuli yokutshintsha imo elinganayo; Ukuba imo yokusebenza ye-onu yimo engalinganiyo, isignali yokutshintsha imo engafaniyo ithunyelwa kwimodyuli yokutshintsha imo engafaniyo;
Imodyuli yokutshintsha imowudi elinganayo isetyenziselwa: emva kokufumana isignali yokutshintsha imowudi elinganayo, gweba ukuba inani lolwazi lwefestile olukhutshwe yi-olt kwimowudi engafaniyo lifikelela kumda othile okanye akunjalo, kwaye ukuba kunjalo, tshintsha imo yokusebenza ye-onu ukusuka kwimowudi elinganayo ukuya kwimowudi engafaniyo; Ngaphandle koko gcina imo yokusebenza ye-onu;
Imodyuli yokutshintsha imo ye-asymmetric isetyenziselwa: emva kokufumana isignali yokutshintsha imo ye-asymmetric, gweba ukuba inani lolwazi lwefestile oluthunyelwe yi-olt kwimo ye-symmetric lingaphezulu komda ochaziweyo, kwaye ukuba kunjalo, tshintsha imo yokusebenza ye-onu ukusuka kwimo ye-asymmetric ukuya kwimo ye-symmetric; Ngaphandle koko gcina imo yokusebenza ye-onu.
Ngokusekelwe kwisicwangciso sobugcisa esikhankanyiweyo apha ngasentla, inkqubo yokufumana uhlobo lwemodyuli ye-optical ye-onu kwimodyuli yokufumanisa i-onu yile: xa i-onu iqala, fumana uhlobo lwemodyuli ye-optical ye-onu:
Ukuba imodyuli ye-optical yimodyuli ye-optical engalinganiyo, yeka ukusebenza;
Ukuba imodyuli yokukhanya yimodyuli yokukhanya elinganayo, xa i-onu itshintsha ukusuka kwimeko yokungakhanyi ukuya kwimeko enxulumeneyo, phinda ufumane uhlobo lwemodyuli yokukhanya ye-onu, ukuba imodyuli yokukhanya yimodyuli yokukhanya elinganayo, qhubeka nenkqubo elandelayo yemodyuli yokufumanisa i-onu; ukuba imodyuli yokukhanya yimodyuli yokukhanya engafaniyo, yeka ukusebenza.
Xa kuthelekiswa nobugcisa bangaphambili, olu vumbululo lwangoku luneengenelo zezi:
(1) Ngokubhekiselele kwinyathelo a le nguqulelo yangoku, kuyaziwa ukuba le nguqulelo yangoku ifumene ngokuchanekileyo uhlobo lwe-onu; ngoko ke, ngokubhekisele kwinyathelo b kunye nenyathelo c le nguqulelo yangoku, kunokubonwa ukuba le nguqulelo yangoku inokuyibona indlela yokusebenza ye-olt, kwaye ngokwendlela yokusebenza ye-olt, ukuziqhelanisa nokulungisa indlela yokusebenza ye-onu, ukuze kufezekiswe ulungelelwaniso olugqibeleleyo phakathi kwe-olt kunye ne-onu, kwaye akuyi kubakho mahluko phakathi kwendlela yokuphela yendawo kunye nendlela yokuphela ekude kubugcisa bangaphambili.
(2) Xa sibhekisa kwinyathelo lokuqala le-onu, kunokubonwa ukuba ukuba i-onu igqiba ekubeni uhlobo lwe-onu yi-onu engalinganiyo, oko kukuthi, i-onu inamandla okusebenza kwi-onu engalinganiyo kuphela, kwaye i-onu inokuqhelana kuphela ne-10g/10g ye-onu engalinganiyo, kwaye ukulandelelana akwenziwa ngeli xesha (kuba i-onu ayinakutshintsha iindlela zokusebenza), ngaloo ndlela kunciphisa iindleko zokusebenza kunye nokuphucula ukusebenza kakuhle komsebenzi.
(3) Ngokubhekiselele kwinqanaba lokuqala le mveliso yangoku, kunokubonwa ukuba le mveliso yangoku kufuneka ibone uhlobo lwemodyuli ye-optical ye-onu xa i-onu iqalwa kwaye xa i-onu itshintsha ukusuka kwimeko emnyama ukuya kwimeko yokukhanya, kwaye ezi zi-2 zikhankanyiweyo apha ngasentla zinokubona imeko yokuqala ye-onu Uhlobo lwemodyuli ye-optical (ukufunyanwa ekuqaleni), kunye nokuba imodyuli ye-optical itshintshiwe na (ukufunyanwa xa itshintsha ukusuka kwimeko yokungakhanyi ukuya kwimeko yokukhanya); ke ngoko, le mveliso yangoku inokutshintsha ngokuchanekileyo iindlela zokusebenza ezilandelayo ngokohlobo lwemodyuli ye-optical ye-onu, ukuqinisekisa ukuchaneka komsebenzi.
Ixesha lokuthumela: Juni-05-2023