Kev loj hlob sai ntawm 5G thev naus laus zis thiab kev siv Is Taws Nem tau ua rau muaj kev nce qib hauv kev thov cov bandwidth thiab txhawb qhov kev nce qib ntawm txhua qhov kev sib koom tes. Raws li qhov tseem ceeb ntawm txhua qhov khoos phis tawm thoob ntiaj teb, ROADM thiab cov lag luam cuam tshuam passive kho qhov muag lag luam yuav tsum ua kom muaj qhov loj hlob sai. Xyoo tsis ntev los no, ROADM thev naus laus zis tau maj mam poob rau cheeb tsam nroog thaj chaw, txuas ntxiv rau kev ua lag luam xav tau ntau dua.
ROADM tuaj yeem rov tsim kho qhov kho qhov muag ntxiv / tso multiplexer, thiab tuaj yeem rub / rub tawm ib qho kev sib txuam ntawm wavelength. Nrog txoj kev loj hlob sai ntawm Is Taws Nem kev tsheb khiav ceev, ROADM kev ua haujlwm hloov pob hluav taws tsis tuaj yeem ua kom tau raws li cov cai. Maj mam tsim ntawm qhov tsis muaj xim / tsis muaj kev sib cav / tsis muaj kev sib cav (CDC).
Lub ntsiab raws ROADM qauv feem ntau muaj nyob hauv Daim Duab 1. NNI sab (kev sib txuas ntawm cov nodes) yog tsim ntawm 1 × N chaw nres nkoj WSS, thiab UNI sab (siv rau hauv zos wavelength upload / download) yog tsim ntawm multicast optical hloov MCS. Ib qhov hloov M × N chaw nres nkoj MCS muaj M tswv yim chaw nres nkoj thiab N cov chaw nres nkoj tawm, thiab tau tsim ntawm M 1 × N chaw nres nkoj kho qhov muag (PS) thiab NM port 1 chaw nres nkoj kho qhov muag (OSW). Lub teeb liab kho qhov muag yog cov tswv yim los ntawm ib qho ntawm cov chaw nres nkoj nkag, thiab tau muab faib ua N xub thawj los ntawm lub tshuab hluav taws xob sib cais, thiab tshaj tawm rau txhua qhov N ntawm qhov hloov pauv; tom qab ntawd kho qhov hloov chaw coj mus rau cov phiaj xwm chaw nres nkoj xaiv xaiv tau txais cov cim teeb liab, thiab lwm cov khoom siv kho qhov muag tsis lees paub nws teeb liab.
Raws li cov haujlwm ntawm 1 × N chaw nres nkoj WSS thiab MCS, ROADM tus qauv no tuaj yeem paub CDC lub luag haujlwm. Txawm li cas los xij, kho qhov muag splitter nyob hauv MCS ua rau muaj qhov ploj ntau dhau thaum uas faib thiab tshaj tawm, yog li ntawd yuav tsum tau siv lub tshuab hluav taws xob ntxiv kom ntxiv rau lub zog kho qhov muag. Nws tseem raug nqi los kho qhov ua kom nrov kho qhov muag. Yog li, EDFA uas twb muaj lawm yuav tsum txuas ntxiv txo qhov loj thiab cov nqi. Optical Cheebtsam hauv EDFA, xws li WDM, cov kho qhov muag cais tawm, TAP txuas ntxiv, tunable optical attenuator VOA, thiab photodetector PD, xav kom muaj kev sib koom ua ke los ntawm kev ua haujlwm sib xyaw los txo qhov loj me thiab tus nqi.