Narrowband vs Wideband
Hauv kev sib txuas lus, band raug xa mus rau qhov ntau zaus (bandwidth) siv hauv cov channel. Nyob ntawm qhov luaj li cas ntawm cov band (nyob rau hauv cov nqe lus ntawm kHz, MHz los yog GHz) thiab ib co lwm yam khoom ntawm kev sib txuas lus channel, lawv yuav categorized li nqaimband thiab wideband thiab lwm yam.
Narrowband
Hauv xov tooj cua, kev sib txuas lus nqaim tau tshwm sim nyob rau hauv ntau zaus uas cov lus teb zaus ntawm cov channel yog tiaj tus (qhov twg qhov nce yog qhov tsis tu ncua rau txhua qhov ntau zaus hauv qhov ntau). Yog li ntawd, cov qhab yuav tsum me dua li qhov sib txuam bandwidth (qhov siab tshaj plaws ntawm cov zaus uas cov lus teb yog tiaj tus), thiab kuj me dua li qhov dav dav (lossis wideband) qhov twg cov lus teb channel tsis tas yuav tiaj tus.
Thaum cov ntaub ntawv sib txuas lus (lossis kev sib txuas hauv is taws nem) muaj kev txhawj xeeb, nqaim band hais txog tus nqi ntawm cov ntaub ntawv raug xa mus nyob rau hauv ib ob (los yog me ntsis ib ob). Dial-up internet kev twb kev txuas (qhov twg cov ntaub ntawv tus nqi tsawg tshaj li 56 kbps) belongs rau lub nqaim band internet qeb. Hauv kev sib txuas hauv xov tooj, khoos phis tawj txuas nrog internet los ntawm modem thiab xov tooj cables.
Wideband
Hauv xov tooj cua, kev sib txuas lus dav dav tshwm sim nyob rau hauv qhov dav dav dua piv rau qhov nqaim. Cov kab dav dav dav tshaj qhov sib txuam bandwidth, thiab yog li ntawd, tsis pom cov lus teb tiaj tus. Wideband yog ib lo lus txheeb ze, thiab qhov loj ntawm cov qhab yuav nyob hauv kHz, MHz lossis GHz nyob ntawm daim ntawv thov.
Rau kev sib txuas hauv internet, lo lus 'wideband' piav qhia tus nqi ntawm cov ntaub ntawv sib txuas. Wideband muab cov ntaub ntawv ntau dua li broadband technologies. Wideband internet tuaj yeem pab txhawb bandwidth siab dua 50Mbps. Lawv muab qhov zoo ntawm cov yeeb yaj kiab streaming thiab kev sib cuam tshuam zoo dua.
Qhov txawv ntawm Narrowband thiab Wideband yog dab tsi?
1. Narrowband kev sib txuas lus siv ntau zaus me me (bandwidth) piv rau kev sib txuas lus dav.
2. Hauv kev siv internet, wideband technologies muab cov ntaub ntawv ntau dua tus nqi (ntau dua 50Mbps), qhov kev sib txuas nqaim muab cov ntaub ntawv qeeb qeeb xws li 56 kbps.
3. Hauv kev sib txuas lus hauv xov tooj cua, bandwidth tsawg dua qhov sib txuas bandwidth ntawm cov channel rau qhov nqaim, thiab dav dua rau wideband.
