Sib txawv ntawm 1G, 2G, 3G vs. 4G thiab 5G
1G (1 st tiam)
1G yog thawj zaug ua lag luam telecommunication wireless thiab pib hauv xyoo 1980s. Thawj thawj zaug, Nippon Telegraph thiab Xov Tooj (NTT) tau qhia hauv Tokyo, Nyiv. Los ntawm muaj, nws tau txais kev saib xyuas ntawm cov neeg tau txais kev pab thiab nyiam ib lub lag luam loj. Nyob rau hauv 1981, 1G tau nkag rau hauv qee lub tebchaws Europe thiab hauv xyoo 1983; 1G nkag mus rau hauv Tebchaws Asmeskas.
Tshuab: 1G ua hauj lwm siv xov tooj cua analogue rau kev sib txuas lus.
Ceev: Qhov ceev ntawm 1G yog pawg txog li 2.4Kbps.
Txuj: 1G tsuas yog siv rau lub suab hu xwb.
Flexibility: Ua ntej nws, xov tooj yuav tsum tau txuas rau kev sib txuas lus. Tom qab qhov kev txhim kho, 1G yooj yim rau cov neeg siv lawv cov xov tooj sab nraum zoov.
Hloov: 1G tau hloov cov kev siv xov tooj cua hauv xov tooj cua, xws li kev siv xov tooj ntawm tes (MTS), Advanced Mobile Telephone System (AMTS), thiab Push to Talk (PTT), tseem ceeb rau cov hnub ntawd.
Kev vam meej: 1G technology siv ib qho kev sib npaug zos, hu ua Advanced Mobile Phone System (AMPS), uas yog tseem niaj hnub no.
2G thiab 3G
2G (2 nd Tiam)
Kev tsim kho ntawm kev siv tshuab coj ib qho tshiab thiab ib tiam tshiab "2G" tau nkag rau xyoo 1991 hauv Finland. 2G raws li tus qauv GSM. Nws yog ntau tshaj li nws tus thawj ntawm thiab yuav luag ua li ntawd tsis tiav.
Dab tsi tshiab: 2G kev tso cai rau cov neeg siv xa thiab tau txais cov ntawv xov xwm thiab cov ntawv xov xwm hauv multimedia (MMS).
Technology: 2G siv cov teeb meem kev sib txuas lus nrog kev siv xov tooj cua.
Ceev: Qhov hloov ceev ntawm 2G Network tau ntau lub sij hawm thiab mus txog qhov kawg siab tshaj tus nqi ntawm 50Kbps nrog kev pab ntawm General Packet Radio Service (GPRS).
Roj teeb hluav taws xob: 2G yuav tsum tau muaj roj qis zog vim tias tsis noj cov roj teeb ntawm cov teeb tseg.
Zoo: Qhov zoo ntawm lub suab zoo tuaj lawm thiab tus neeg siv tsis ntsej muag suab nrov.
Tsis pub twg paub: 2G khees me ntsis kev ceev ntiag tug ntawm cov neeg siv raws li cov lus thiab MMS digitally encrypted thiab tus neeg siv tib leeg qhib tau lawv.
Tsis muaj ntau lub ntsej muag cloned: Nyob rau hauv lub hnub ntawm 1G, nws muaj peev xwm muaj ob lub handsets nrog tib tus naj npawb. Tab sis, 2G kaw tshooj lus no thiab tas nrho cov sij hawm muaj kev dag ntxias ntawm ob tug xov tooj.
Tsis zoo:
Tsaus qhov teeb meem: Yog tias qhov teeb meem tsis muaj zog hauv ib cheeb tsam twg, cov neeg siv yuav tsis tau txais kev pab them nqi hluav taws xob hauv cheeb tsam ntawd.
Cov teeb liab muaj lub qhov nkhaus nkhaus, uas yog jagged lwj nkhaus, thaum analogue muaj ib tus. Thaum twg cov mob nyhav, qhov teeb liab qhov analogue yuav ua tau zoo tshaj qhov digital.
Qhov txo cov suab ntawm lub suab: Nws tshwm sim rau ntawm tus account ntawm kev siv compression los ntawm cov lis dej num.
2.5G: Nws yog nruab nrab ntawm kev siv tshuab " 2G thiab 3G" . Kom nws yooj yim, nws tuaj yeem txhais tias yog 2G + GPRS. Nws yog ntau dua li nws cov thawjcuam vim nws siv cov txheej txheem hloov khoom siv hloov ntawm ib puag ncig circuit-switched. Nyob rau hauv qhov tseeb, nws nce lub hloov tus nqi ntawm 2G technology. Nws kuj muaj peev xwm pab tau cov neeg siv cov xov tooj hauv lawv lub xov tooj ntawm tes.
2.75G: 2.5G ntxiv evolved thiab ua rau 2.75G, tseem hu ua (EDGE) Enhanced Cov ntaub ntawv rau GSM Evolution. Nws yog sai dua GPRS.
Txawm hais tias 2G tseem muaj nyob rau ntau lub teb chaws, qee lub tebchaws tau npaj los kaw .
3G vs 4G
3G (3 lawm tiam)
3G yog tiam tom ntej thiab muab kev pabcuam zoo rau txhua yam. 3G tau pib hauv xyoo 2001 thiab ua raws cov qauv teev tseg los ntawm International Telecommunications Union (ITU).
Hloov ceev: 3G muab ceev ceev hauv internet tab sis nyob ntawm lub tshuab ua haujlwm los ntawm tus neeg zov me nyuam.
144Kbps-2Mbps
WCDMA = 384Kbps
HSPA lossis 3.5 G = 7.2Mbps
HSPA + lossis 3.75 G = 21.6 Mbps
Coj ib lub kiv puag ncig: 3G hloov tag nrho lub tswv yim ntawm kev siv xov tooj ntawm tes. Txawv mobile apps zoo li Whatsapp, IMO, siv tau rau lub suab thiab video hu thoob ntiaj teb. Ib tug neeg ua lag luam tuaj yeem tau txais nyiaj thiab tau txais nyiaj los ntawm kev siv internet banking nkaus xwb los ntawm nws lub xov tooj ntawm tes.
Daim ntaub ntawv: GPS, Mobile TV, Yees duab xav tau, Video Conference.
Compatibility nrog cov cuab yeej: Ib tus neeg siv tau txaus siab rau 3G internet surfing ntawm tsuas 3G txhawb kev pab kiag li lawm. Yog hais tias tus ntaus ntawv tsis txhawb 3G, nws tseem tsis tau txaus siab rau 3G nyob ntawd ntaus ntawv.
Subscription: Tus neeg siv yuav tsum hu rau nws tus kws pabcuam thiab sau npe rau cov kev pabcuam 3G. Txwv tsis pub, nws yuav tsis muaj peev xwm txaus siab rau kev sib txuas lus high-speed ntawm 3G Technology.
Tus nqi ntawm cov kev pab: Txawm tias 3G siv tau them tus nqi loj, cov neeg ua haujlwm tau txais cov ntaub ntawv cov ntaub ntawv sib txawv los ntawm lawv cov chaw muab kev pabcuam.
4G thiab 5G
4G (4 th tiam)
4G yog ntau dua thiab kev kho dua tshiab siv niaj hnub no. 4G yog ib qho kev txhim kho ntawm 3G. 4G muaj nyob rau hauv ob hom nam, WiMAX (Worldwide Interoperability Microwaves Access) thiab LTE (Long Term Evolution). Lub LTE version ntawm 4G yog dav siv thiab feem ntau muaj.
Ceev:
Nyob rau thaum xyoo 2008, ITU tau teeb tsa cov qauv txheej txheem rau 4G, raws li International Mobile Telecommunications Advanced (IMT-Advanced) thiab teem caij qis tshaj ntawm 100 Mbps thiab siab tshaj 1 Gbps. Ib qho txuas uas muab qhov kev hloov no tuaj yeem hu ua 4G.
Hauv lwm lo lus, ntawm txoj haujlwm nyob ruaj ruaj, qhov ceev yuav tsum nyob ib ncig ntawm 1 Gbps thiab thaum tsiv nws yuav tsum muaj tsawg tshaj 100 Mbps.
Daim ntaub ntawv: HD TV, HD VOD, 3D TV thiab kev ua si.
4G LTE
4G LTE ntau dua thaum uas xav xaiv qhov hloov. Raws li nws tau yooj yim mus cuag tus nqi xa mus, cov regulating body nkag LTE yuav raug hu ua ib qho kev hloov ntawm 4G, yog nws surpassed 3G. Lwm sai version ntawm LTE yog LTE +.
5G (5 th tiam)
5G ntau tham txog lwm tiam neeg, thiab tej zaum muaj ntau zaus dua sai tshaj tam sim no 4G. 5G tshuab tau sim nyob hauv lub chaw kuaj mob thiab tau khiav tawm ntawm qhov kev sim xwb.
Cov ntawv sau tau: Kev muaj tiag, Kev muaj tiag, Kev tsav tsheb rau nws tus kheej.
Cov cuab yeej technology: Cov cuab yeej siv thawj zaug siv los ua Millimeter yoj band uas ua haujlwm ntawm 30 GHz rau 300 GHz ntau. Cov qhoos niaj hnub, siv los ntawm cov koom haum network yog hauv qab 6 GHz.
Tus cwj pwm ceev: Lub downloading thiab uploading yuav ua tau ib ncig ntawm 20 Gbps thiab 10 Gbps feem .