LTE vs IMS
LTE (Long Term Evolution) thiab IMS (IP Multimedia Subsystems) yog ob qho tib si thev naus laus zis tsim los txhawb cov tiam tom ntej ntawm cov kev pabcuam broadband mobile. LTE yog tiag tiag ib tug wireless broadband technology tsim los pab txhawb roaming Internet siv xov tooj ntawm tes. IMS yog ntau dua ntawm cov qauv tsim qauv tsim los txhawb IP cov kev pabcuam multimedia thiab tau nyob ib puag ncig rau qee lub sijhawm.
LTE Technology
Long Term Evolution (LTE) yog lub wireless broadband technology tsim los ntawm Third Generation Partnership Project (3GPP), kom ua tiav cov txiaj ntsig siab tshaj qhov uas tau muab los ntawm tiam tam sim no ntawm UMTS 3G thev naus laus zis.
Cov thev naus laus zis no tau raug hu ua "Long Term Evolution" vim tias nws tau dhau los ua qhov pom tseeb ua tiav ntawm UMTS, 3G thev naus laus zis raws li GSM. Li no, nws raug suav hais tias yog 4G thev naus laus zis. LTE muab cov ntaub ntawv nce siab tshaj plaws, nrog rau qhov nruab nrab muaj peev xwm muab 100 Mbps hauv qab thiab 30 Mbps sab saud. Ntawm cov kev txhim kho loj, cov peev txheej bandwidth scalable thiab txo latency tau pab kom muaj kev pabcuam zoo. Tsis tas li ntawd, qhov rov qab sib raug zoo nrog GSM thiab UMTS thev naus laus zis uas twb muaj lawm muab txoj hauv kev zoo rau 4G thev naus laus zis. Kev txhim kho yav tom ntej ntawm LTE twb muaj cov phiaj xwm los txhim kho qhov siab tshaj plaws hauv kev txiav txim ntawm 300 Mbps.
Cov txheej txheem thauj khoom siv los ntawm txhua txheej sab saud ntawm LTE yog raws li TCP / IP. LTE txhawb txhua hom kev sib xyaw cov ntaub ntawv, suab, yees duab, thiab kev xa xov. Lub multiplexing tshuab siv los ntawm LTE yog OFDM (Orthogonal Frequency Division Multiplexing) thiab, nyob rau hauv ntau qhov kev tso tawm tshiab, MIMO (Ntau cov tswv yim ntau cov zis) tau qhia. LTE siv UMTS Terrestrial Radio Access Network (E-UTRAN) raws li huab cua interface txhawm rau txhim kho qhov ncav cuag tau rau cov xov tooj ntawm tes uas twb muaj lawm. E-UTRAN tseem yog lub xov tooj cua nkag mus rau hauv network tus qauv uas tau qhia los hloov UMTS, HSDPA thiab HSUPA thev naus laus zis tau teev tseg ua ntej hauv 3GPP tawm.
Qhov yooj yim IP raws li architecture siv hauv LTE ua rau, txo qis kev ua haujlwm thiab kho tus nqi, thiab ntxiv rau, lub peev xwm ntawm E-UTRAN cell yog qhov tsis txaus ntseeg. Feem ntau, thaum xav txog qhov kev pab them nqi nkaus xwb E-UTRAN cell txhawb plaub zaug raws li cov ntaub ntawv thiab lub suab muaj peev xwm txhawb nqa los ntawm ib leeg HSPA cell.
IMS
IMS yog thawj zaug tsim tshwj xeeb rau cov ntawv thov txawb los ntawm 3GPP thiab 3GPP2. Txawm li cas los xij, niaj hnub no nws yog qhov nrov heev thiab nthuav dav ntawm cov chaw muab kev pabcuam ruaj khov, vim lawv raug yuam kom nrhiav txoj hauv kev los koom ua ke cov thev naus laus zis sib txuas rau hauv lawv lub network. IMS feem ntau ua rau kev sib koom ua ke ntawm cov ntaub ntawv, kev hais lus, thiab xov tooj ntawm tes siv thev naus laus zis dhau IP raws li kev tsim kho vaj tse, thiab nws muab cov peev txheej tsim nyog IMS xws li kev tswj xyuas kev pabcuam, kev ruaj ntseg ua haujlwm (e.g. authentication, tso cai), routing, sau npe, them, SIP compression, thiab QOS txhawb.
IMS tuaj yeem txheeb xyuas nrog nws cov txheej txheem txheej txheem uas suav nrog ntau txheej txheej nrog cov haujlwm sib txawv. Cov qauv no tau ua kom rov siv tau ntawm cov kev pabcuam pabcuam thiab ntau lwm yam haujlwm rau ntau daim ntawv thov. Lub luag haujlwm ntawm thawj txheej yog los txhais cov neeg nqa khoom thiab cov teeb liab channel los ntawm legacy circuit switch based networks rau pob ntawv raws kwj thiab tswj. Lub functionality ntawm txheej thib ob yog muab cov theem pib tshaj tawm ua haujlwm rau cov ntawv thov qib siab dua. Ntxiv mus, IMS tau tso cai rau lwm tus neeg thib peb los tswj hwm kev hu xov tooj thiab nkag mus rau cov neeg siv khoom nyiam los ntawm kev siv cov kev pabcuam siab dua thiab API gateways.
IMS architecture muab lub sijhawm rau cov neeg muab kev pabcuam xa cov kev pabcuam tshiab thiab zoo dua, nrog rau kev txo nqi khiav haujlwm hla cov xov hlau, wireless, thiab broadband networks. Feem ntau ntawm cov ntawv thov kev txhawb nqa los ntawm Session Initiation Protocol (SIP) tau koom ua ke los ntawm IMS txhawm rau ua kom muaj kev sib raug zoo ntawm cov kev pabcuam hauv xovtooj nrog lwm cov kev pabcuam hauv xovtooj xws li, xa xovtooj, xovtooj sib tham, sib tham thiab video. streaming.
Qhov txawv ntawm IMS thiab LTE yog dab tsi?
