HSPA thiab HSPA + Txhim Kho Kev Txuam Txim Hauv Internet rau 3G Cellphones
3G cov tes hauj lwm tsis yog qhov ceev tshaj plaws, tab sis lawv tseem siv tau los ntawm ntau tus neeg thiab feem ntau cov chaw muab kev pab cuam. High-Speed Packet Access yog ib tus qauv rau kev sib txuas lus wireless network hauv lub tsev neeg 3G. HSPA tsev neeg ntawm cov txheej txheem sib tham nrog HSDPA thiab HSUPA. Ib qho enhanced version ntawm HSPA hu ua HSPA + ntxiv zog rau cov txheej txheem no.
HSDPA
HSPA siv txoj kev kub ntxhov rau High-Speed Downlink Pob ntawv siv nkag mus download tau tsheb. HSDPA txhawb cov ntaub ntawv theoretical siab tshaj ntawm 1.8 Mbps thiab 14.4 Mbps (piv rau 384 Kbps siab tshaj plaws ntawm cov thawj 3G). Thaum nkag los, nws tau muab txoj kev lag luam zoo li no loj dua 3G tus HSDPA-based tes hauj lwm raug xa mus rau 3.5G lossis Super-3G.
HSDPA tus qauv raug lees paub nyob rau xyoo 2002. Nws siv AM technology uas ua rau lub suab seev raws li qhov sib npaug ntawm qhov kev siv network.
HSUPA
High-Speed Uplink Packet Access muab ceev ceev rau cov ntaub ntawv mobile khoom uploads rau 3G networks zoo li HSDPA rau downloads. HSUPA txhawb kev ntaus nqi txog 5.7 Mbps. Los ntawm kev tsim, HSUPA tsis muaj tib cov ntaub ntawv raws li HSPDA, vim cov neeg zov me nyuam muab feem ntau ntawm lawv lub lag luam muaj peev xwm rau kev sib tw kom haum cov qauv siv ntawm cellphone cov neeg siv.
HSUPA tau pib xyoo 2004, tom qab HSDPA. Cov tes hauj lwm uas nws thiaj li txhawb tau ob lub npe hu ua HSPA tes hauj lwm.
HSPA thiab HSPA & # 43; rau 3G tes hauj lwm
Ib qho enhanced version ntawm HSPA hu ua HSPA + los yog Evolved HSPA tau tsim thiab tau raug muab los ntawm ntau tus neeg nqa khoom los pab txhawb kev loj hlob loj ntawm cov kev pab cuam hauv xov tooj . HSPA + yog tus txheej txheem 3G tshaj plaws, txhawb cov ntaub ntawv ntawm 42, 84 thiab qee zaus 168 Mbps rau kev tshaj tawm thiab mus txog 22 Mbps rau uploads.
Thaum lub tshuab thawj zaug pib, cov neeg siv ntawm qee tus tes hauj lwm hauv 3G tau qhia txog cov teeb meem nrog lawv cov xov tooj txav nquag hloov ntawm HSPA thiab cov laus dua 3G hom. HSPA thiab HSPA + qhov kev tiv thaiv kev ruaj ntseg tsis yog qhov teeb meem ntxiv lawm. Tsuas yog cov kev siv glitches nrawm nkaus xwb, cov neeg siv ntawm 3G tes tsis tas yuav tsim tshwj xeeb rau lawv cov cuab yeej siv los siv HSPA los yog HSPA thaum lawv tus kws kho mob txhawb nws zoo. Raws li nrog lwm cov kev sib txuas ntawm cov xov tooj, cov ntaub ntawv tseeb yog tus neeg muaj peev xwm ua tiav hauv lawv lub xov tooj nrog HSPA los yog HSPA + tsawg dua qhov ntau tshaj plaws tau teev tseg hauv kev lag luam specs. Tus HSPA download nqi ntawm cov tes hauj lwm nyob yog 10 Mbps los yog qis dua nrog HSPA + thiab tsawg li 1 Mbps rau HSPA.
HSPA & # 43; Versus LTE
Cov ntaub ntawv tseem ceeb ntawm HSPA + ua rau muaj qee yam hauv kev lag luam mus saib nws ua ib qho technology 4G. Thaum HSPA + muab qee qhov txiaj ntsig los ntawm cov neeg siv kev pom, cov kws paub haujlwm pom zoo tias LTE technology zoo dua li qhov muaj tseeb thaum 4G thaum HSPA + tsis tau. Ib qho tseem ceeb ntawm qhov tseem ceeb ntawm ntau tes hauj lwm yog qhov latency qis dua uas LTE txuas tau tshaj HSPA +.