Muyezo wa ieee802.3av umatanthauzira 10g/1g (chiwerengero cha uplink 10g/downlink 1g) asymmetric physical layer mode (pano akutchedwa 10g/1g asymmetric mode) ndi 10g/10g (chiwerengero cha uplink ndi downlink rate zonse ndi 10g) symmetric two A physical layer (pano akutchedwa 10g/10g symmetric mode):
Olt mu 10g/1g non-pair mode ikhoza kugwirizana ndi onu mu 1g/1g symmetric mode ndi onu mu 10g/1g asymmetric mode. OLT mu 10g/10g symmetric mode ikhoza kugwirizana ndi onu mu 1g/1g mode, onu mu 10g/1g asymmetric mode, ndi onu mu 10g/10g symmetric mode.
OLT mu mawonekedwe ofanana ndi OLT mu mawonekedwe osafanana ndi ofanana mu njira yolowera pansi ya njira yowunikira ya gawo lenileni, ndipo njira ya 10g imagwiritsa ntchito kutalika kwa 1577nm ndi 64b/66b code encoding; kotero kaya onu ili mu mawonekedwe ofanana kapena mawonekedwe osafanana, imatha kulandira deta yolowera pansi kuchokera ku olt. Olt nthawi ndi nthawi imafalitsa mpcpdsicoverygate (multi-point control protocol, multi-point control protocol). Gawo la chidziwitso chopeza mu chimango limagwiritsidwa ntchito makamaka kudziwitsa kuthekera kwa zenera la uplink (1g, 10g, 1g+10g dual rate), ndipo onu imatha kupeza olt kudzera mu mawonekedwe ogwirira ntchito a chimango awa.
Onu mu mawonekedwe ofanana ndi asymmetric mode imakhala yofanana kwathunthu pa mac layer (media access control, medium access control layer), ndipo kusiyana pakati pawo kumayikidwa mu phy layer (physical layer, pansi pa osi), ndipo magawo otumizira a phy layer amadalira Ikani optical module ya onu:
Pamene gawo losafanana la kuwala laikidwa mu onu (ndiko kuti, onu ndi onu yosafanana), popeza kuchuluka kwa uplink kwa gawo losafanana la kuwala kuli mpaka 1g, gawo la phy la onu limangokhazikitsa kuchuluka kwa kutumiza kwa 1g kuti ligwire ntchito mu mawonekedwe osafanana. Pamene gawo losafanana la kuwala laikidwa mu onu, popeza kuchuluka kwa uplink kwa gawo losafanana la kuwala kuli mpaka 10g, onu ikhoza kukhazikitsa kuchuluka kwa kutumiza kwa gawo la phy kufika pa 10g kuti ligwire ntchito mu mawonekedwe osagwirizana, kapena kukhazikitsa kuchuluka kwa kutumiza kwa gawo la phy kufika pa 1g kuti ligwire ntchito mu mawonekedwe osafanana.
Komabe, onu ndi olt zomwe zilipo zidzakhala ndi zolakwika izi pamene netiweki ikukwezedwa:
Pakusintha kwa netiweki, OLT ingasinthe pakati pa mawonekedwe ofanana ndi mawonekedwe osafanana, koma ONU singasinthe malinga ndi kusintha kwa OLT. Mwachitsanzo, OLT imasintha kuchoka pa mawonekedwe ofanana kupita ku mawonekedwe osafanana, koma ONU ikadali mu mawonekedwe ofanana. Pakadali pano, mawonekedwe am'deralo (olt) ndi mawonekedwe akutali (onu) sakugwirizana.Zinthu zodziwikiratu zaukadaulo:
Poganizira zolakwika zomwe zinalipo kale, vuto laukadaulo lomwe lathetsedwa ndi chipangizochi ndi: momwe mungapangire kuti onu isinthe mosinthika malinga ndi momwe olt imasinthira pamene olt ikusintha mawonekedwe ofanana/osafanana; chipangizochi chimakwaniritsa kuphatikiza kwabwino kwa olt ndi onu Adaptation, sipadzakhala kusiyana pakati pa mawonekedwe am'deralo ndi mawonekedwe akutali.
Kuti tikwaniritse cholinga chomwe chili pamwambapa, onu yomwe yaperekedwa ndi chipangizochi imasintha kukhala 10g/10g yofanana ndi 10g/1g yosagwirizana, kuphatikizapo masitepe otsatirawa:
Gawo a: Pezani mtundu wa module yowunikira ya onu. Pamene module yowunikira ili module yowunikira yofanana, dziwani momwe onu ikugwirira ntchito panopa. Ngati njira yogwirira ntchito ya onu ili yofanana, pitani ku gawo b; ngati njira yogwirira ntchito ya onu ili yosagwirizana, pitani ku gawo c;
Gawo b: Dziwani ngati chiwerengero cha chidziwitso cha zenera chomwe chaperekedwa ndi olt mu asymmetric mode chili pamwamba pa malire omwe atchulidwa, ngati ndi choncho, sinthani working mode ya onu kuchokera ku symmetrical mode kupita ku asymmetrical mode, ndi end; apo ayi, sungani working mode ya onu, ndi end;
Gawo c: Dziwani ngati chiwerengero cha chidziwitso cha zenera chomwe chaperekedwa ndi olt mu symmetric mode chili pamwamba pa malire omwe atchulidwa, ngati ndi choncho, sinthani working mode ya onu kuchokera ku asymmetric mode kupita ku symmetric mode, ndi end; apo ayi, sungani working mode ya onu, end.
Potengera njira yaukadaulo yomwe ili pamwambapa, njira yopezera mtundu wa module ya optical ya onu yomwe yafotokozedwa mu gawo a ndi iyi: pamene onu ikuyamba, pezani mtundu wa module ya optical ya onu:
Ngati gawo la kuwala ndi gawo losawoneka bwino, siyani njirayo ndi kutha;
Ngati gawo la kuwala ndi gawo lofanana, pamene onu yasintha kuchoka pa mkhalidwe wopanda kuwala kupita ku mkhalidwe woyenera, bweretsani mtundu wa gawo la kuwala la onu, ngati gawo la kuwala ndi gawo lofanana la kuwala, pitirizani njira yotsatira ya sitepe a; ngati gawo la kuwala ndi gawo lofanana la kuwala, siyani njirayo ndi kutha.
Onu yomwe yaperekedwa ndi chipangizochi imasintha malinga ndi machitidwe a 10g/10g ofanana ndi 10g/1g osafanana, kuphatikizapo gawo lozindikira la onu, gawo losinthira la symmetrical mode, ndi gawo losinthira la asymmetrical mode lomwe lili pa onu;
Gawo lozindikira la onu limagwiritsidwa ntchito: kupeza mtundu wa gawo lowunikira la onu, pamene gawo lowunikira ndi gawo lowunikira lofanana, kudziwa momwe onu ikugwirira ntchito panopa, ngati njira yogwirira ntchito ya onu ndi njira yofanana, kutumiza chizindikiro chosinthira mawonekedwe ofanana ku gawo losinthira mawonekedwe ofanana; Ngati njira yogwirira ntchito ya onu ndi njira yosagwirizana, chizindikiro chosinthira mawonekedwe osafanana chimatumizidwa ku gawo losinthira mawonekedwe osafanana;
Module yosinthira mawonekedwe ofanana imagwiritsidwa ntchito: mutalandira chizindikiro chosinthira mawonekedwe ofanana, weruzani ngati chiwerengero cha chidziwitso cha zenera chomwe chaperekedwa ndi olt mu mawonekedwe osafanana chafika pamlingo wodziwika kapena ayi, ndipo ngati ndi choncho, sinthani mawonekedwe ogwirira ntchito a onu kuchokera ku mawonekedwe ofanana kupita ku mawonekedwe osafanana; Apo ayi sungani mawonekedwe ogwirira ntchito a onu;
Gawo losinthira mawonekedwe a asymmetric limagwiritsidwa ntchito: mutalandira chizindikiro chosinthira mawonekedwe a asymmetric, weruzani ngati chiwerengero cha chidziwitso cha zenera chomwe chatumizidwa ndi olt ku mawonekedwe ofananira chili pamwamba pa malire omwe atchulidwa, ndipo ngati ndi choncho, sinthani mawonekedwe ogwirira ntchito a onu kuchokera ku mawonekedwe a asymmetric kupita ku mawonekedwe ofananira; Apo ayi pitirizani mawonekedwe ogwirira ntchito a onu.
Kutengera ndi njira yaukadaulo yomwe yatchulidwa pamwambapa, njira yopezera mtundu wa module yowunikira ya onu mu module yozindikira ya onu ndi iyi: pamene onu ikuyamba, pezani mtundu wa module yowunikira ya onu:
Ngati gawo la kuwala ndi gawo losafanana, siyani kugwira ntchito;
Ngati gawo la kuwala ndi gawo lofanana, pamene onu yasintha kuchoka pa mkhalidwe wopanda kuwala kupita ku mkhalidwe wofanana, bweretsani mtundu wa gawo la kuwala la onu, ngati gawo la kuwala ndi gawo lofanana la kuwala, pitirizani njira yotsatira ya gawo lozindikira la onu; ngati gawo la kuwala ndi gawo losagwirizana la kuwala, siyani kugwira ntchito.
Poyerekeza ndi luso lakale, luso lamakonoli lili ndi ubwino wa:
(1) Ponena za gawo loyamba la chipangizochi, zitha kudziwika kuti chipangizochi choyamba chapeza mtundu wa onu molondola; pachifukwa ichi, ponena za gawo b ndi gawo c la chipangizochi, zitha kuoneka kuti chipangizochi chikhoza kuzindikira momwe olt imagwirira ntchito, ndipo malinga ndi momwe olt imagwirira ntchito, kusintha kuti asinthe momwe onu imagwirira ntchito, kuti azindikire momwe olt imagwirira ntchito bwino, ndipo sipadzakhala kusiyana pakati pa njira yomaliza yakumaloko ndi njira yomaliza yakutali muzojambula zam'mbuyomu.
(2) Ponena za gawo loyamba la chipangizochi, zitha kuwoneka kuti ngati chipangizochi chitsimikiza kuti mtundu wa onu ndi onu wosafanana, kutanthauza kuti, onu ili ndi mphamvu yogwira ntchito mwanjira yosafanana, ndipo onu imatha kusintha kokha ku 10g/10g yofanana, ndipo kutsatira sikukuchitika panthawiyi (chifukwa onu silingasinthe njira zogwirira ntchito), potero kuchepetsa ndalama zogwirira ntchito ndikuwonjezera magwiridwe antchito.
(3) Ponena za gawo loyamba la chipangizochi, zitha kuwoneka kuti chipangizochi chikuyenera kuzindikira mtundu wa chipangizo chowunikira cha onu pamene chipangizochi chikuyamba komanso pamene chipangizochi chikusintha kuchoka pa mdima kupita pa kuwala, ndipo njira ziwiri zomwe tatchulazi zitha kuzindikira momwe chipangizochi chikuyambira. Mtundu wa chipangizo chowunikira (kuzindikira poyambira), komanso ngati chipangizochi chasinthidwa (kuzindikira posintha kuchoka pa mdima kupita pa kuwala); chifukwa chake, chipangizochi chingathe kusintha molondola njira zogwirira ntchito zotsatira malinga ndi mtundu wa chipangizo chowunikira cha onu, kuti zitsimikizire kulondola kwa ntchitoyo.
Nthawi yotumizira: Juni-05-2023