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 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 ekuqondisweni 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-ol 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 lifika ku-1g, ungqimba lwe-phy lwe-onu lungamisa kuphela izinga lokudlulisela elingu-1g. ukusebenza kumodi ye-asymmetric.Uma i-symmetrical optical module ifakwe ku-onu, njengoba izinga lokukhuphuka kwe-optical module lifinyelela ku-10g, i-onu ingalungisa 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 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;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 iyimojuli ye-optical elinganayo, lapho i-onu ishintsha isuka esimweni sokungakhanyi iye esimweni esifanele, iphinda ithole uhlobo lwemojula ye-onu, uma imojula ye-optical 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) Ngokubhekisela esinyathelweni sokuqala sokusungulwa kwamanje, kungabonakala ukuthi okusunguliwe kwamanje kudinga ukuthola uhlobo lwemojuli yokubona ye-onu lapho i-onu iqaliswa nalapho i-onu ishintsha isuka esimweni sobumnyama iye esimweni sokukhanya. , kanye nokutholwa oku-2 okukhulunywe ngenhla kungathola isimo sokuqala se-onu Uhlobo lwemojuli ye-optical (ukubona ekuqaleni), kanye nokuthi imojula yokubona ishintshiwe yini (ukubona 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