3G vs 4G hauv Australia
3G thiab 4G yog ob qho tib si mobile wireless nkag siv thev naus laus zis. 3G tau siv dav thoob plaws ntiaj teb tam sim no thaum 4G tseem tab tom hloov zuj zus thiab twb tau xa mus rau qee lub nroog hauv Tebchaws Europe thiab hauv Asmeskas nkaus xwb. Telstra lub Telco loj hauv Australia tshaj tawm rau 15th Lub Ob Hlis 2011 tias lawv tab tom npaj tsim 4G LTE Network tom qab xyoo no. Muaj lwm cov neeg nqa khoom xws li SingTel Optus, Peb, Vodafone thiab Virgin Mobile muab kev pabcuam 3G hauv Australia.
Tus Thawj Coj Tus Thawj Coj ntawm Telstra Mr. David Thodey tshaj tawm ntawm World Mobile Conference 2011 hauv Barcelona tias Telstra npaj yuav hloov kho nws cov G (3G Network) uas twb muaj lawm nrog Long Term Evolution (LTE) technology.
4G kev xa tawm los ntawm cov neeg nqa khoom yuav cuam tshuam ncaj qha rau tsoomfwv NGN cov peev txheej txij li LTE tuaj yeem muab qhov kev xav tau 400 Mbps uas txaus txaus rau cov neeg siv hauv tsev. Qhov no yuav muaj kev cuam tshuam rau tsoomfwv txoj haujlwm NGN nrog lub tswv yim los muab kev dav dav dav dav rau Australian cov tsev. Ib yam li thaum LTE Advanced lossis WiMAX 2 los rau hauv kev ua lag luam uas muaj peev xwm muab 1.2 Gbps theoretically yuav cuam tshuam rau lub tswv yim tom qab tsoomfwv hauv kev pib NBN Project.
Kev npaj 4G xa tawm los ntawm Telstra kuj tseem yuav cuam tshuam hauv Smartphone thiab ntsiav tshuaj Kev Lag Luam hauv Australia. Feem ntau ntawm 3G handsets tam sim no yuav tsis txhawb 4G network yog li cov neeg siv yuav tsum tau yuav 4G txhawb nqa tshiab. Feem ntau ntawm LTE handsets yuav txhawb HSPA + ib yam nkaus. Yog li tam sim no onwards cov neeg siv yuav tos ntsoov yuav handsets lossis ntsiav tshuaj uas tuaj yeem txhawb nqa LTE thiab 3G tes hauj lwm. Yog li yuav muaj kev qhib rau 4G-LTE Smartphones thiab Tablets thiab cov chaw tsim khoom yuav tsom mus rau Australian lag luam thiab. Cov qauv no yuav cuam tshuam rau Apple iPhone kev lag luam thiab lwm lub xov tooj siab kawg hauv Australia txij li iPhones thiab lwm lub xov tooj siab kawg muaj hnub no tsuas yog txhawb nqa 3G tes hauj lwm. Cov neeg siv yuav xav ua ntej yuav lawv nrog 2 xyoo daim ntawv cog lus tshwj tsis yog cov tswv lag luam lossis cov tuam txhab xov tooj pub dawb lossis tsawg dua rau kev hloov cov xov tooj thaum lawv 4G Xov tooj raug tso tawm.
3G (Third Generation Networks)
3G yog lub tshuab siv wireless hloov pauv 2G tes hauj lwm. Qhov txiaj ntsig tseem ceeb ntawm 3G yog, nws nrawm dua 2G tes hauj lwm. Smart mobile handsets yog tsim tsis tsuas yog rau lub suab hu, tab sis kuj rau kev siv Internet thiab mobile daim ntaub ntawv. 3G tes hauj lwm tso cai rau ib txhij lub suab thiab cov ntaub ntawv kev pab cuam nrog ceev variation ntawm 200 kbit / s thiab yog hais tias nws tsuas yog cov ntaub ntawv nws yuav xa ob peb Mbit / s. (Mobile Broadband)
Ntau 3G thev naus laus zis tau siv tam sim no thiab qee qhov ntawm lawv yog EDGE (Txhim kho cov ntaub ntawv tus nqi rau GSM Evolution), los ntawm CDMA tsev neeg EV-DO (Evolution-Data Optimized) uas siv Code Division Multiple Access lossis Time Division Multiple Access rau multiplexing, HSPA (High Speed Packet Access) uas siv 16QAM modulation txheej txheem (Quadrature Amplitude Modulation) thiab ua rau cov ntaub ntawv tus nqi ntawm 14 Mbit / s downlink thiab 5.8 Mbit / s uplink speeds) thiab WiMAX (Wireless Interoperability rau Microwave Access - 802.16).
Qhov txiaj ntsig tseem ceeb ntawm 3G tes hauj lwm dhau 2G yog cov ntaub ntawv nrawm dua ib txhij nrog lub suab.
4G (Forth Generation Networks)
Txhua tus neeg tsom mus rau tam sim no tig mus rau 4G vim nws cov ntaub ntawv tus nqi. Hauv kev sib txuas lus ceev ceev (xws li tsheb ciav hlau lossis tsheb) nws theoretically muaj 100 Mbit / s thiab kev sib txuas lus qis qis lossis kev nkag mus ruaj khov yuav ua rau 1 Gbit / s. Qhov no yog kev hloov pauv loj hauv kev siv tshuab wireless.
Nws yog qhov sib npaug heev kom tau txais LAN lossis Gigabit Ethernet txuas rau lub xov tooj ntawm tes.
4G muab txhua qhov kev sib txuas lus IP nrog kev nkag mus rau cov xov tooj ntse, ntsiav tshuaj, laptops thiab txhua lub xov tooj ntse. Theoretically hais lus no 4G nkag mus ceev yog ntau tshaj Cable los yog DSL technologies nyob rau hauv lub siab 4G yog ceev tshaj ADSL, ADSL2 los yog ADSL2+.
Thaum 4G tau pib thiab yog tias koj muaj tsawg kawg 54 Mbits / s (qhov xwm txheej phem tshaj) rub tawm ntawm koj lub xov tooj ntawm tes lossis ntsiav tshuaj, koj tuaj yeem khiav ib daim ntawv thov hauv internet li koj ua hauv desktop computers. Piv txwv li koj tuaj yeem khiav Skype, YouTube, IP TV apps, Video on Demand, VoIP Client thiab ntau ntxiv. Yog tias koj muaj ib tus neeg siv VoIP ntsia ntawm koj lub cuab yeej tes koj tuaj yeem ua VoIP hu los ntawm koj lub xov tooj. Qhov no yuav tua lub suab nrov lag luam sai sai. Nyob rau tib lub sijhawm koj tuaj yeem sau npe rau ib tus lej hauv zos rau koj tus neeg siv khoom VoIP mobile thiab pib txais kev hu xov tooj ntawm koj lub xov tooj ntawm IP. Piv txwv li yog tias koj nyob hauv New York koj tsis tas yuav tau txais NY tus lej hloov koj tuaj yeem sau npe Toronto tus lej xov tooj hauv koj lub xov tooj ntawm VoIP tus neeg siv. Txhua qhov chaw koj mus hauv 4G kev pab them nqi lossis thaj chaw Wi-Fi koj tuaj yeem tau txais kev hu rau koj tus lej Toronto. (Txawm tias koj tuaj yeem sau npe rau Switzerland tus lej tas thiab nyob hauv New York).
