Ib qho kev taw qhia txog 1G, 2G, 3G, 4G & 5G Wireless
Ib lub wireless carrier yuav txhawb 4G lossis 3G thaum ib co xov tooj tau tsa rau ib qho ntawm cov neeg xwb. Koj qhov chaw yuav tsuas qhia rau koj lub xov tooj tau 2G speeds, los yog koj yuav pom lub sij hawm 5G txav ib ncig ntawm thaum tham txog smartphones.
Txij li thaum 1G twb pib nyob rau hauv thawj xyoo 1980s, ib qho tshiab wireless mobile telecommunications tshuab tau raug tso tawm roughly txhua 10 xyoo. Tag nrho lawv xa mus rau lub tshuab uas siv los ntawm tus neeg tsav tsheb thiab ntaus nws tus kheej; lawv muaj kev sib txawv thiab cov nta uas txhim kho nyob rau hauv lub cim ua ntej nws.
Thaum lub sij hawm ib qho kev sau acronym yog ib qho kev siv thev naus laus zuj zus rau cov neeg xav tau tsis xav tau, lwm tus tseem ceeb rau kev nkag siab txhua hnub. Tej zaum koj yuav xav paub tias cov kev yees no txawv li cas thiab seb nws siv tau rau koj thaum koj yuav khoom hauv xov tooj, tau cov lus qhia txog kev pabcuam, losyog subscribing rau tus neeg tsav tsheb.
1G: Lub suab xwb
Nco ntsoov analog "cib xov tooj" thiab "lub xov tooj ntawm tes", txoj kev rov qab rau hnub ntawd? Xov tooj ntawm tes pib nrog 1G hauv lub 1980s.
1G yog ib qho kev siv tshuab analog thiab cov xov tooj feem ntau tsis muaj roj teeb lub neej thiab lub suab nrov yog loj tsis muaj kev ruaj ntseg, thiab qee zaus muaj kev hu xov tooj.
Max ceev ntawm 1G yog 2.4 Kbps . Ntau »
2G: SMS & MMS
Xovtooj ntawm tes tau txais thawj cov kev hloov loj thaum lawv mus ntawm 1G rau 2G. Qhov no leap coj qhov chaw hauv 1991 rau GSM tes hauj lwm ua ntej, hauv Finland, thiab tau coj cov xov tooj ntawm tes los ntawm analog rau digital.
Cov kev siv xov tooj 2G muab hu thiab text encryption, ntxiv rau cov kev pab cuam xws li SMS, duab lus, thiab MMS.
Txawm hais tias 2G twb hloov 1G thiab yog superseded los ntawm cov yees raws li hauv qab no, nws tseem siv thoob ntiaj teb.
Tsav ceev ntawm 2G nrog General Packet Xov tooj cua Service (GPRS) yog 50 Kbps los yog 1 Mbps nrog Cov Ntawv Txawv Tebchaws Tshaj Tawm rau GSM Evolution (EDGE). Ntau »
2.5G & 2.75G: Thaum kawg cov ntaub ntawv, tab sis qeeb
Ua ntej ua qhov loj leap ntawm 2G rau 3G wireless networks, qhov tsawg dua-paub 2.5G thiab 2.75G yog ib qho qauv uas txuas ntawm qhov sib txawv
2.5G qhia txog cov txheej txheem hloov tshiab pob khoom tshiab uas ua tau zoo tshaj qhov peb tau siv yav dhau los.
Qhov no coj mus rau 2.75G uas yog muab qhov kev ua threeforate threefold nce. 2.75G nrog EDGE pib nyob rau hauv Teb Chaws Asmeskas nrog GSM networks (AT & T yog thawj). Ntau »
3G: Ntau Cov Ntaub Ntawv! Video hu & Txawb Internet
3G networks tau nkag tau rau hauv 1998 thiab sawv rau tiam tom ntej hauv koob no; peb tiam neeg.
3G ushered nyob rau hauv ceev cov ntaub ntawv-kis ceev ces koj yuav siv koj lub xov tooj ntawm tes nyob rau hauv ntau cov ntaub ntawv-demanding txoj kev zoo li kev hu xov tooj hu thiab mobile internet.
Zoo li 2G, 3G evolved mus rau 3.5G thiab 3.75G raws li cov nta tau tshaj tawm kom thiaj li coj tau 4G.
Max ceev ntawm 3G yog kwv yees li ntawm 2 Mbps rau cov khoom tsis yog-tsiv thiab 384 Kbps thaum tsav tsheb. Theoretical max ceev rau HSPA + yog 21.6 Mbps. Ntau »
4G: Tus Txheem Tam Sim No
Lub cim thib plaub ntawm tes hauj lwm yog hu ua 4G, uas tau tso tawm rau hauv 2008. Nws txhawb nqa mobile web li 3G tiam sis tseem gaming cov kev pab cuam, HD mobile TV, video conferencing, 3D TV thiab lwm yam uas xav tau siab dua.
Nrog rau qhov kev siv ntawm 4 G, qee cov nta 3G yog raug muab tshem tawm, xws li kev sib kis spectrum xov tooj cua technology; lwm leej lwm tus ntxiv rau me ntsis nqi vim cov ntse antennas.
Max ceev ntawm ib lub network 4G thaum ntaus ntawv yog tsiv yog 100 Mbps los yog 1 Gbps rau kev sib txuas lus tsis zoo sib xws li thaum nyob ruaj ruaj lossis taug kev. Ntau »
5G: tab tom yuav tuaj
5G yog ib qho uas tsis tau-siv-siv wireless uas yog npaj los txhim kho rau 4G.
5G cog lus kom sai dua cov ntaub ntawv, cov kev sib txuas siab dua, qis tshaj latency, ntawm lwm qhov kev txhim kho. Ntau »