Izinga le-ieee802.3av lichaza u-10g/1g (isilinganiso sokuxhumanisa esingu-10g/downlink isilinganiso 1g) imodi yesendlalelo esibonakalayo esingalingani (ngemuva kwalokhu esibizwa ngokuthi imodi ye-asymmetric engu-10g/1g) kanye no-10g/10g (izinga lokuxhumanisa phezulu kanye nezinga le-downlink kokubili kungu-10g) kokubili ku-symmetrical A ungqimba olubonakalayo (ngemuva kwalokhu olubizwa ngokuthi imodi ye-symmetric engu-10g/10g):
I-olt ekumodi yokungabhanqi engu-10g/1g ingahambisana ne-onu kumodi yokulinganisa engu-1g/1g kanye ne-onu kumodi ye-asymmetric engu-10g/1g.I-OLT kumodi yokulinganisa engu-10g/10g ingahambisana ne-onu kumodi engu-1g/1g, i-onu kumodi ye-asymmetric engu-10g/1g, kanye ne-onu kumodi ye-symmetric engu-10g/10g.
I-OLT kumodi ye-symmetric kanye ne-OLT kumodi ye-asymmetric iyafana ekuqondeni kwe-downlink yendlela ye-optical yesendlalelo esibonakalayo, futhi isiteshi se-10g sisebenzisa i-wavelength ye-1577nm kanye nekhodi yekhodi engu-64b / 66b;ngakho-ke kungakhathaliseki ukuthi i-onu ikumodi yokulinganisa noma imodi ye-asymmetric, ingakwazi Ukuthola idatha ye-downlink evela ku-olt.I-olt izosakaza ngezikhathi ezithile uhlaka lwe-mpcpdsicoverygate (iphrothokholi yokulawula amaphuzu amaningi, iphrothokholi yokulawula amaphuzu amaningi).Inkambu yolwazi lokutholwa kuhlaka isetshenziswa ngokukhethekile ukwazisa amandla ewindi le-uplink (1g, 10g, 1g+10g isilinganiso esikabili), futhi i-onu ingathola i-olt ngale ndlela yokusebenza yamanje yohlaka.
I-onu ekumodi yokulinganisa kanye nemodi ye-asymmetric ihambisana ngokuphelele kusendlalelo se-mac (ukulawulwa kokufinyelela kwemidiya, ungqimba lokulawula ukufinyelela okuphakathi), futhi umehluko phakathi kwakho ugxile kungqimba lwe-phy (ungqimba olubonakalayo, ungqimba olungezansi lwe-OS), kanye ukuthumela imingcele yesendlalelo se-phy kuncike kokuthi Faka imojula yokubona ye-onu:
Uma i-asymmetric optical module ifakwe ku-onu (okungukuthi, i-onu iyi-onu e-asymmetric), njengoba izinga lokukhuphuka kwe-asymmetric optical module lifinyelela ku-1g, ungqimba lwe-phy lwe-onu lungamisa kuphela izinga lokudlulisela elingu-1g. ukusebenza kumodi ye-asymmetric.Uma i-symmetrical optical module ifakwa ku-onu, njengoba izinga lokukhuphuka kwe-optical module lifinyelela ku-10g, i-onu ingahlela izinga lokuthumela le-phy layer ibe ngu-10g ukuze isebenze kumodi yokulinganisa, noma ilungise izinga lokuthumela ungqimba lwe-phy kuya ku-1g ukuze usebenze ngemodi ye-asymmetric.
Nokho, i-onu ne-olt ekhona izoba namaphutha alandelayo uma inethiwekhi ithuthukiswa:
Ngesikhathi sokuthuthukiswa kwenethiwekhi, i-OLT ingase ishintshe phakathi kwemodi yokulinganisa kanye nemodi ye-asymmetric, kodwa i-ONU ayikwazi ukushintsha ngokuya ngokuguqulwa kwe-OLT.Isibonelo, i-OLT ishintsha isuka kumodi yokulinganisa iye kumodi ye-asymmetric, kodwa i-ONU isekumodi yokulinganisa.Ngalesi sikhathi, isiphetho sasendaweni (i-olt) nesiphetho esikude (i-onu) azifani.Izinto zokufezeka kobuchwepheshe:
Ngokuhloswe ngamaphutha akhona kubuciko bangaphambili, inkinga yobuchwepheshe exazululwe yilokhu okusunguliwe yilena: indlela yokwenza i-onu iguqule ngokuguquguqukayo ngokuya ngemodi yokuguqula ye-olt lapho i-olt yenza ukuguqulwa kwemodi ye-symmetric/imodi ye-asymmetric;okusunguliwe kwamanje kuqonda inhlanganisela ephelele ye-olt ne-onu Adaptation, ngeke kube khona ukungafani phakathi kwemodi yokugcina yasendaweni kanye nemodi yesiphetho esikude.
Ukuze kuzuzwe injongo engenhla, i-onu ehlinzekwe ngokusungulwa kwamanje ivumelana ne-10g/10g symmetry kanye ne-10g/1g asymmetry, okuhlanganisa nezinyathelo ezilandelayo:
Isinyathelo a: Thola uhlobo lwemojuli ye-optical ye-onu.Uma imojula yokubona iyimojuli ye-optical elinganayo, nquma imodi yokusebenza yamanje ye-onu.Uma imodi yokusebenza ye-onu iyimodi yokulinganisa, hamba kusinyathelo b;uma imodi yokusebenza ye-onu iyimodi ye-asymmetrical, hamba esinyathelweni c;
Isinyathelo b: Thola ukuthi inombolo yolwazi lwewindi ekhishwe i-olt kumodi ye-asymmetric ingaphezu komkhawulo oshiwo, uma kunjalo, shintsha imodi yokusebenza ye-onu isuke kumodi yokulinganisa iye kumodi ye-asymmetrical, bese uphetha;uma kungenjalo, gcina imodi yokusebenza ye-onu, futhi uqede;
Isinyathelo c: Thola ukuthi ingabe inombolo yolwazi lwewindi ekhishwe i-olt ngemodi yokulinganisa ingaphezu komkhawulo oshiwo, uma kunjalo, shintsha imodi yokusebenza ye-onu isuke kumodi ye-asymmetric iye kumodi yokulinganisa, bese uphetha;uma kungenjalo, gcina imodi yokusebenza ye-onu, ukuphela.
Ngokwesisekelo sesixazululo sobuchwepheshe esingenhla, inqubo yokuthola uhlobo lwemojuli ye-optical ye-onu echazwe esinyathelweni a ithi: lapho i-onu iqala, thola uhlobo lwemojula ye-optical ye-onu:
Uma imojula ye-optical iyimojuli ye-asymmetric optical, nqamula inqubo futhi uqede;
Uma imojuli ye-optical iyimojula ye-optical elinganayo, lapho i-onu ishintsha isuka esimweni sokungakhanyi iye esimweni esifanele, iphinda ithole uhlobo lwemojuli yokubona ye-onu, uma imojula yokubona iyimojula yokubona elinganayo, qhubeka nenqubo elandelayo. wesinyathelo a;uma imojuli ye-optical i-asymmetrical Optical module, nqamula inqubo futhi uqede.
I-onu ehlinzekwe ngokusungulwa kwamanje ivumelana ne-10g/10g yamasistimu asymmetrical kanye ne-10g/1g asymmetrical, okuhlanganisa imojula yokuthola i-onu, imojula yokushintsha imodi yokulinganisa, kanye nemojuli yokushintsha yemodi e-asymmetrical ehlelwe ku-onu;
Imojula yokuthola i-onu isetshenziselwa: ukuthola uhlobo lwemojula ye-onu, lapho imojula ye-optical iyimodyuli ye-symmetrical optical, inquma imodi yokusebenza yamanje ye-onu, uma imodi yokusebenza ye-onu iyimodi ye-symmetrical, thumela isignali yokushintsha imodi ye-symmetrical kumojuli yokushintsha imodi yokulinganisa;Uma imodi yokusebenza ye-onu iyimodi ye-asymmetric, isignali yokushintsha imodi ye-asymmetric ithunyelwa kumojula yokushintsha imodi ye-asymmetric;
Imojula yokushintsha imodi ye-symmetric isetshenziselwa: ngemva kokuthola isignali yokushintsha yemodi ye-symmetric, yahlulela ukuthi inombolo yolwazi lwewindi ekhishwe i-olt kumodi ye-asymmetric ifinyelela embundwini othile noma cha, futhi uma kunjalo, shintsha imodi yokusebenza ye-onu. kusukela kumodi ye-symmetric kuya kumodi ye-asymmetric;Uma kungenjalo gcina imodi yokusebenza ye-onu;
Imojula yokushintsha imodi ye-asymmetric isetshenziselwa: ngemva kokuthola isignali yokushintsha yemodi ye-asymmetric, yahlulela ukuthi inombolo yolwazi lwewindi oluthunyelwe yi-olt kumodi yokulinganisa ingaphezu komkhawulo oshiwo, futhi uma kunjalo, shintsha imodi yokusebenza ye-onu isuke. imodi ye-asymmetric kumodi ye-symmetric;Uma kungenjalo gcina kumodi yakho yokusebenza.
Ngokwesisekelo sohlelo lobuchwepheshe olushiwo ngenhla, inqubo yokuthola uhlobo lwemojula ye-onu kumojula yokuthola i-onu yilena: lapho i-onu iqala, thola uhlobo lwemojula yokubona ye-onu:
Uma imodyuli ye-optical iyimojuli ye-asymmetric optical, yeka ukusebenza;
Uma imojula yokubona iyimojula ye-optical elinganayo, lapho i-onu ishintsha isuka esimweni sokungakhanyi iye esimweni esihlobene, iphinda ithole uhlobo lwemojuli yokubona ye-onu, uma imojula yokubona iyimojula yokubona elinganayo, qhubeka nenqubo elandelayo. wemojula yokuthola i-onu;uma imojuli ye-optical iyimojuli ye-Optical non-Symmetrical, yeka ukusebenza.
Uma kuqhathaniswa nobuciko bangaphambili, okusunguliwe kwamanje kunezinzuzo zalokhu:
(1) Ngokubhekisela esinyathelweni a sokusungulwa kwamanje, kungaziwa ukuthi okusunguliwe kwamanje kuqale ngokunembile ngokunembile uhlobo lwe-onu;ngalesi sisekelo, kubhekiselwa esinyathelweni b kanye nesinyathelo c sokusungulwa kwamanje, kungabonakala ukuthi okusunguliwe manje kungathola imodi yokusebenza ye-olt, futhi ngokuya ngemodi yokusebenza ye-olt, ukuzivumelanisa nokulungisa imodi yokusebenza. ye-onu, ukuze ubone ukuvumelana okuphelele phakathi kwe-olt ne-onu, futhi ngeke kube khona ukungafani phakathi kwemodi yokugcina yasendaweni kanye nemodi yesiphetho esikude kubuciko bangaphambili.
(2) Ngokubhekiselwa esinyathelweni a sokusungulwa kwamanje, kungabonakala ukuthi uma okusunguliwe kwamanje kunquma ukuthi uhlobo lwe-onu luyi-onu engalingani, okungukuthi, i-onu kuphela inamandla okusebenza ngendlela engasimetric, futhi i-onu ingakwazi ukuzivumelanisa nemodi yokulinganisa ye-10g/10g kuphela, futhi ukulandelwa akwenziwa kule nqubo yesikhathi (ngoba i-onu ayikwazi ukushintsha izindlela zokusebenza), ngaleyo ndlela yehlise izindleko zokusebenza futhi ithuthukise ukusebenza kahle komsebenzi.
(3) Ngokubhekiselwa esinyathelweni sokuqala sokusungulwa kwamanje, kungabonakala ukuthi okusunguliwe kwamanje kudinga ukuthola uhlobo lwemojuli ye-optical ye-onu lapho i-onu iqaliswa nalapho i-onu ishintsha isuka esimweni esimnyama iye esimweni sokukhanya. , kanye nokutholwa oku-2 okukhulunywe ngenhla kungathola isimo sokuqala se-onu Uhlobo lwemojuli yokubona (ukutholwa ekuqaleni), kanye nokuthi imojula yokubona ishintshiwe yini (ukutholwa lapho kushintsha kusuka esimweni esingakhanyi kuya esimweni sokukhanya) ;ngakho-ke, ukusungulwa kwamanje kungashintsha ngokunembile izindlela zokusebenza ezilandelayo ngokusho kohlobo lwe-onu's optical module , ukuze kuqinisekiswe ukunemba komsebenzi.
Isikhathi sokuthumela: Jun-05-2023