TELUS 4G vs 4G+ LTE
TELUS 4G yog tus muab kev pabcuam wireless network raws li Canada, uas siv HSPA + (High Speed Packet Access) cov txheej txheem nrog kev siv ob lub cab kuj. TELUS 4G+ LTE yog kauj ruam tom ntej ntawm TELUS cov chaw muab kev pabcuam raws li Forth Generation Long Term Evolution networks. Txawm hais tias, ob qho tib si tuaj yeem ua lag luam raws li 4th tiam tes hauj lwm, raws li US standardizations muaj qhov sib txawv ntawm huab cua sib txawv ntawm HSPA + thiab LTE technologies.
TELUS 4G
TELUS yog Canadian wireless network muab kev pabcuam uas ua haujlwm nrog ob tus neeg nqa khoom HSPA + network. TELUS tau tshaj tawm 4G thev naus laus zis hauv xyoo 2009 nrog qhov ceev tshaj plaws ntawm 21Mbps, uas ua tiav siv HSPA + thev naus laus zis. Tom qab ntawd lawv tau hloov kho lub network los txhawb qhov siab tshaj plaws downlink ceev ntawm 42Mbps, uas tau tsim tawm hauv xyoo 2011. 42Mpbs tuaj yeem ua tiav nrog HSPA + nrog kev txhawb nqa nqa ob. Raws li TELUS lub vev xaib, qhov nruab nrab rub tawm ceev yog nyob ib puag ncig 7 txog 14Mbps, thaum lub network siab tshaj rub tawm ceev yog 42Mbps. TELUS tab tom npaj yuav tshaj tawm 4G + nrog LTE thev naus laus zis yav tom ntej. Raws li qhov tam sim no network siab tshaj uplink ceev yog 5.76Mbps. Nws tseem yuav tsum raug sau tseg tias kev nkag mus rau Is Taws Nem ceev uas muab los ntawm tus neeg siv lub network yuav txawv vim muaj ntau yam xws li cov cuab yeej siv, kev sib txuas hauv network, kev ncua deb ntawm lub xov tooj ntawm tes, cov xwm txheej hauv zos thiab lwm yam. TELUS HSPA + technology npog thaj tsam 97% ntawm cov cov neeg nyob hauv Canada. TELUS siv 1900MHz thiab 850MHz zaus bands raws li 3GPP specification rau lawv HSPA + network. Txij li thaum TELUS ua haujlwm nrog ob lub tshuab nqa khoom siv lawv muaj cov ntaub ntawv sib cais thiab lub suab raws, uas kuj pab txhim kho lub network thiab ua kom muaj peev xwm.
TELUS 4G+LTE
4G+ LTE yog lub cim txuas ntxiv txuas ntxiv uas twb tau npaj los ntawm TELUS kom xa tawm thaum ntxov 2012. Thawj LTE tso tawm tau ua tiav los ntawm 3GPP thaum Lub Kaum Ob Hlis 2008, thaum kev tshawb fawb LTE tau pib thaum ntxov 2005. TELUS 4G+ LTE txhawb nqa mus txog qhov siab tshaj ntawm 150Mbps downlink thiab 75Mbps uplink ceev. LTE downlink siv Orthogonal Frequency Division Multiple Access (OFDMA) nrog 64 QAM (Quadrature Amplitude Modulation) cov txheej txheem kom ua tiav cov kev ua haujlwm siab, thaum LTE uplink siv DFTS-OFDMA (Ib leeg Carrier Frequency Division Multiple Access) thiab 64 QAM txheej txheem. Downlink spectral efficiency yog txuas ntxiv txhim kho los ntawm LTE siv cov txheej txheem siab heev xws li zaus tshaj tawm channel nyob ntawm lub sijhawm teem sijhawm thiab Ntau Cov Lus Qhia thiab Ntau Qhov Tso Tawm (MIMO) kav hlau txais xov. Kev kub siab ntawm LTE yog cov vaj tsev tiaj tus, uas tau ua tiav siv Node-B, System Architecture Evolution Gateway (SAE-GW) thiab Mobile Management Entity (MME). eNode-B txuas nrog MME thiab nrog SAE-GW rau kev tswj lub dav hlau cov ntaub ntawv hloov tsheb (Signalling) thiab rau cov neeg siv dav hlau cov ntaub ntawv hloov tsheb (cov ntaub ntawv neeg siv) feem. Vim qhov no yooj yim architecture tsuas yog ntawm E-UTRAN (Universal Terrestrial Radio Access Network) yog E-NodeB uas txhawb kev sib txuas lus ntawm E-NodeB ncaj qha. Cov qauv no tso cai rau cov neeg siv cov ntaub ntawv tsuas yog xav tau los ntawm cov tub ntxhais, thaum lwm cov ntaub ntawv ncaj qha los ntawm eNode-B ntawm txoj kev zoo. TELUS 4G+ LTE siv Advanced Wireless Spectrum (AWS) uas npog 1700/2100MHz spectrum. Thawj txoj kev npaj ntawm TELUS yog siv 4G + LTE rau hauv nroog cov chaw hauv nroog thiab tom qab kev sib tw ntawm 700MHz spectrum, uas muab kev nkag mus ntev dua, TELUS npaj yuav nthuav dav cov kev pab them nqi mus rau cov chaw nyob deb nroog.
Qhov txawv ntawm TELUS 4G thiab TELUS 4G+ LTE yog dab tsi?
TELUS 4G yog kev siv 4G raws li Canadian wireless service provider siv HSPA+, thaum TELUS 4G+ LTE yog cov tiam tom ntej ntawm tib lub chaw pabcuam uas yuav muab cov ntaub ntawv siab dua li cov network uas twb muaj lawm. Tam sim no TELUS 4G ua haujlwm nrog HSPA + nrog ob tus neeg nqa khoom kom ua tiav cov ntaub ntawv siab, thaum 4G + LTE tau npaj yuav xa mus rau thaum ntxov 2012.4G + LTE yog 3GPP tso tawm 8 tus qauv, uas tau pib pib ua tus qauv 4G, thaum HSPA + yog kev txhim kho ntawm 3G qauv (3GPP tso tawm 6 thiab 7) uas tuaj yeem txhawb nqa cov ntaub ntawv siab nruab nrab xws li LTE.
HSPA+ thiab LTE muaj kev hloov pauv ntawm kev tsim vaj tsev ib yam nkaus. LTE txhawb nqa ntau lub tiaj tiaj tiaj tiaj nrog kev txhim kho tsuas yog tsom mus rau pob ntawv hloov pauv cov kev pabcuam, thaum HSPA + txhawb nqa ob pob ntawv hloov pauv thiab hloov pauv hloov chaw siv SGSN / GGSN thiab MSC-S / MGwbased core architecture.
Vim TELUS 4G rau lub sijhawm tam sim no yog HSPA +, lawv muaj ntau txoj kev txhawb nqa khoom siv thaum piv nrog LTE raws li 4G + network li vim tias muaj cov khoom siv uas txhawb nqa LTE tsis zoo ib yam li nrog HSPA + cov khoom txhawb nqa. Qhov no tsuas yog vim qhov sib txawv ntawm huab cua interface. HSPA + cov txheej txheem tau qhia los ntawm kev txhim kho cov txheej txheem 3rd tiam, uas muaj kev sib raug zoo rov qab, thaum 4G tau ua raws li cov txheej txheem huab cua tshiab uas tso cai rau kev ua haujlwm ntau dua.
TELUS 4G + LTE tuaj yeem txhawb nqa mus txog 150Mbps downlink thiab 75Mbps uplink raws li 3GPP qhov tshwj xeeb, thaum TELUS 4G tsuas yog txhawb nqa mus txog 42Mbps downlink thiab 5.76Mbps uplink vim qhov sib txawv thiab kev txwv hauv cov thev naus laus zis.
TELUS 4G + LTE yog cov txheej txheem ua haujlwm tau zoo thiab ua kom zoo dua li cov txheej txheem TELUS 4G tam sim no, uas feem ntau hu ua HSPA+.
