Txheeb xyuas qhov muaj zog ntawm cov thev naus laus zis hauv qab ntawm lub xov tooj ntawm tes yog qhov yooj yim yog tias koj nkag siab lub ntsiab lus ntawm 1G, 2G, 3G, 4G, thiab 5G. 1G yog hais txog thawj tiam ntawm wireless cellular technology, 2G yog hais txog lub thib ob tiam ntawm technology, thiab hais txog. Raws li koj tuaj yeem xav, tiam tom ntej tau nrawm dua thiab muaj kev txhim kho lossis cov yam ntxwv tshiab. Feem ntau cov neeg nqa khoom wireless tam sim no txhawb nqa ob qho tib si 4G thiab 3G thev naus laus zis, uas yog siv tau thaum koj qhov chaw tso cai rau koj lub xov tooj ua haujlwm ntawm 3G nrawm.
Txij li 1G tau tshaj tawm thaum xyoo 1980s, lub tshuab xov tooj ntawm tes xov tooj tshiab tau tshaj tawm kwv yees li 10 xyoo. Tag nrho cov ntawm lawv xa mus rau cov cuab yeej siv los ntawm lub xov tooj ntawm tes thiab ntaus ntawv nws tus kheej. Lawv muaj qhov sib txawv ceev thiab cov yam ntxwv uas txhim kho nyob rau tiam dhau los. Cov tiam tom ntej yog 5G, uas tau tsim tawm xyoo 2020.
1G: Suab nkaus xwb
Nco ntsoov cov xov tooj analog rov qab rau hnub? Cov xov tooj ntawm tes pib nrog 1G thev naus laus zis hauv xyoo 1980s. 1G yog thawj tiam ntawm wireless cellular technology. 1G txhawb lub suab nkaus xwb.
1G yog analog thev naus laus zis, thiab cov xov tooj siv nws muaj roj teeb lub neej tsis zoo thiab lub suab tsis zoo, kev nyab xeeb me ntsis, thiab pheej yig dua hu.
Qhov siab tshaj plaws ntawm 1G thev naus laus zis yog 2.4 Kbps.
2G: SMS thiab MMS
Cov xov tooj ntawm tes tau txais lawv thawj qhov kev txhim kho loj thaum lawv cov thev naus laus zis mus ntawm 1G mus rau 2G. Qhov leap no tau tshwm sim hauv Finland xyoo 1991 ntawm GSM tes hauj lwm thiab tau txais cov xov tooj ntawm tes los ntawm kev sib txuas lus rau digital.
Lub 2G xov tooj thev naus laus zis tau qhia txog kev hu xov tooj thiab sau ntawv encryption, nrog rau cov kev pabcuam cov ntaub ntawv xws li SMS, duab cov lus, thiab MMS.
Txawm tias 2G hloov 1G thiab hloov pauv los ntawm cov thev naus laus zis tom qab, nws tseem siv thoob ntiaj teb.
Qhov siab tshaj plaws ntawm 2G nrog General Packet Radio Service (GPRS) yog 50 Kbps. Qhov siab tshaj plaws theoretical ceev yog 384 Kbps nrog Cov Ntaub Ntawv Ntxiv rau GSM Evolution (EDGE). EDGE+ tuaj yeem nce mus txog 1.3 Mbps.
2.5G thiab 2.75G: Cov ntaub ntawv, Thaum kawg
Ua ntej ua qhov loj leap ntawm 2G mus rau 3G wireless networks, tsawg dua-paub 2.5G thiab 2.75G yog cov qauv ib ntus uas txuas qhov sib txawv los ua cov ntaub ntawv xa mus - cov ntaub ntawv xa mus qeeb - ua tau.
2.5G tau qhia txog cov txheej txheem hloov pob ntawv tshiab uas ua haujlwm tau zoo dua li 2G thev naus laus zis. Qhov no coj mus rau 2.75G, uas tau muab qhov kev xav tau nce peb zaug. AT&T yog thawj GSM network los txhawb 2.75G nrog EDGE hauv Teb Chaws Asmeskas
2.5G thiab 2.75G tsis tau txhais ua raws li cov qauv wireless. Lawv tau ua haujlwm feem ntau yog cov cuab yeej lag luam los txhawb cov xov tooj ntawm tes tshiab rau pej xeem.
3G: Ntau Cov Ntaub Ntawv, Kev Hu Xov Tooj, thiab Is Taws Nem Hauv Xov Tooj
Kev taw qhia ntawm 3G tes hauj lwm hauv xyoo 1998 tau ua sai dua yog thawj zaug siv rau 3G cellular technology.
Zoo li 2G, 3G hloov zuj zus mus rau qhov nrawm dua 3.5G thiab 3.75G raws li ntau tus nta tau qhia kom coj txog 4G.
Qhov siab tshaj plaws ntawm 3G yog nyob ib puag ncig 2 Mbps rau cov khoom siv tsis txav thiab 384 Kbps hauv tsheb txav.
4G: Tus Qauv Tam Sim No
Lub cim thib plaub ntawm kev sib txuas, uas tau tso tawm xyoo 2008, yog 4G. Nws txhawb nqa kev nkag mus rau hauv lub vev xaib xws li 3G ua thiab tseem muaj kev pabcuam gaming, HD mobile TV, video conferencing, 3D TV, thiab lwm yam uas xav tau ceev ceev.
Qhov siab tshaj plaws ntawm 4G network thaum lub cuab yeej txav yog 100 Mbps. Qhov ceev yog 1 Gbps rau kev sib txuas lus qis qis xws li thaum tus neeg hu xov tooj nyob ruaj ruaj lossis taug kev.
Cov qauv xov tooj ntawm tes tam sim no txhawb nqa 4G thiab 3G thev naus laus zis.
5G: Tus Qauv Tom ntej
5G yog lub thev naus laus zis wireless nrog kev txwv tsis pub tshaj tawm uas tau npaj los txhim kho ntawm 4G.
5G cog lus kom ceev cov ntaub ntawv ntau dua, kev sib txuas ntau dua, qis dua latency, thiab txuag hluav taws xob, ntawm lwm yam kev txhim kho.
Qhov kev xav tau qhov kev xav tau nrawm ntawm 5G kev sib txuas yog mus txog 20 Gbps ib ob.
FAQ
Thaum twg 2G yuav raug txiav tawm?
2G tes hauj lwm raug kaw thoob ntiaj teb kom txuag tau cov nqi ua haujlwm thiab siv xov tooj cua zaus rau cov tes hauj lwm tshiab. Piv txwv li, AT&T thiab T-Mobile yuav tshem tawm lawv cov 2G tes hauj lwm los ntawm 2022. Vim li ntawd, qee cov cuab yeej qub yuav tsis tuaj yeem txuas ntxiv lawm.
Thaum twg iPhone 2G tso tawm?
Lub iPhone, rov qab hu ua iPhone 2G, yog thawj tus qauv iPhone muab los ntawm Apple. Nws tau tso tawm rau lub Rau Hli 29, 2007
