3G thiab 4G yog wireless thev naus laus zis uas tso cai rau koj kom tau txais kev siv Is Taws Nem sai los ntawm cov khoom siv mobile (ntsiav tshuaj thiab smartphones nrog cov qauv tsim). 4G yog lub thev naus laus zis ntau tshaj 3G.
3G (Lus Askiv thib peb tiam) yog tiam thib peb lub xov tooj sib txuas lus thiab xa cov ntaub ntawv xa cov thev naus laus zis uas ua haujlwm hauv decimeter ntau zaus. 4G (plaub tiam) yog lub tshuab tshiab txuas ntxiv nrog kev ua haujlwm siab nrawm dua. Ib qho qauv hluav taws xob tshwj xeeb yuav tsum txuas mus rau 3G lossis 4G. Cov khoom siv txawb no tau nruab nrog lub ntsej muag coj tus qauv.
Qhov sib txawv ntawm 3G thiab 4G
Lub ntsiab sib txawv ntawm ob hom thev naus laus zis yog cov ntaub ntawv hloov ceev. Thiab 3G modems tseem pheej yig dua. 3G tes hauj lwm muaj peev xwm xa cov ntaub ntawv ntawm cov kab sib txawv, uas yog nyob ntawm qhov ua haujlwm nquag ntawm tus neeg teb xov tooj txawb. Qhov ntau dua qhov zaus, qhov ntau dua ntawm qhov nrawm. Piv txwv li, cov neeg ua haujlwm MTS, Beeline thiab Megafon muaj qhov ua haujlwm zaus ntawm 15 MHz, thaum Skylink tseem muaj tsuas yog 4.5 MHz. Yog li no, nyob rau lub sijhawm no, peb tus neeg saum toj no tau siv 3G Internet nrawm dua. Raws li rau qhov ceev ntau, nws li ntawm ntau pua kilobits mus rau ntau kaum ntawm megabits.
4G txhawb cov ntaub ntawv cov nqi ntau dua 100 Mbps rau cov khoom siv mobile (muaj qauv hauv cov qauv). USB qauv rau cov khoom siv nyob ruaj ruaj tuaj yeem ua haujlwm ntawm 1 Gbps.
Qhov zoo thiab qhov tsis zoo ntawm 3G
Lub ntsiab kom zoo ntawm 3G yog nws qhov chaw loj. Cov thev naus laus zis no tau txhawb nqa los ntawm yuav luag txhua lub xov tooj txawb. Thiab rau cov nyob ruaj ruaj computers, netbooks thiab laptops, koj tuaj yeem siv USB 3G qauv.
Raws li rau qhov tsis zoo ntawm cov tshuab no, lawv cuam tshuam nrog cov ntsuas kev ceev ceev. Yog li, 3G Is Taws Nem yog qhov tsim nyog rau cov neeg siv uas tsis xav rub tawm cov ntaub ntawv ntau ntawm kev kub ceev.
3G Internet ua haujlwm tau zoo hauv thaj chaw hauv nroog, thiab sab nraud lub nroog, kev siv tau nws nyob ntawm thaj chaw npog kev pabcuam los ntawm tus neeg siv xov tooj txawb. Cov ntaub ntawv hloov cov ntaub ntawv tawm sab nraud lub nroog yuav qis dua.
4G zoo thiab tsis zoo
Cov khoom siv sib txuas nrog lub ntsuas phoo 4G ntawm lub vev xaib, vim tias muaj qhov ceev cov ntaub ntawv xa mus, muaj kev siv fais fab loj dua. Tab sis rau cov nyob ruaj ruaj computers uas ib qho USB sab nraud modem txuas nrog, qhov no tsis yog teeb meem. Thiab rau cov neeg siv ntawm cov khoom siv txawb, nws tsim cov teeb meem ntxiv, vim tias cov smartphones thiab cov ntsiav tshuaj yuav raug tshem tawm sai dua. Yog tias koj xav tau mobile internet thaum mus ncig, nws yog qhov zoo dua yog siv 3G modem.
4G tes hauj lwm tsis muaj kev pab dav dav thiab tab tom nyuam qhuav pib txhim kho kom nquag plias. Yog li no, nws yuav siv qee lub sijhawm rau qhov kev sib txuas lus 4G kom dhau los muaj nyob txhua qhov chaw. Qhov tsis zoo ntawm 4G suav nrog tus nqi ntau ntawm cov khoom siv txawb uas txhawb nqa cov tshuab no. Raws li rau 4G hom qauv, lawv tuaj yeem txuas rau txhua lub computer nyob ib puag ncig lossis lub laptop ntawm lub USB qhov.
