Cov txheej txheem:
Video: Fach yog dab tsi hauv UMTS?
2024 Tus sau: Lynn Donovan | [email protected]. Kawg hloov kho: 2023-12-15 23:47
FACH - Nkag mus rau Channel. A UMTS thauj channel uas tsim cov downlink ib nrab ntawm kev thauj channel khub hu ua RACH (Random Access Channel) / FACH (Forward Access Channel) ua ke. Nws yog siv rau downlink signaling thiab me me ntawm cov ntaub ntawv.
Ntawm no, hom channel siv hauv 3g yog dab tsi?
3G UMTS kev thauj mus los muaj xws li:
- Dedicated Transport Channel (DCH) (nce thiab downlink).
- Tshaj Tawm Channel (BCH) (downlink).
- Forward Access Channel (FACH) (down link).
- Paging Channel (PCH) (downlink).
- Random Access Channel (RACH) (uplink).
- Uplink Common Packet Channel (CPCH) (uplink).
Ib sab saum toj no, RRC xeev hauv UMTS yog dab tsi? Xov tooj cua Resource Control ( RRC ) raws tu qauv siv nyob rau hauv UMTS thiab LTE ntawm huab cua interface. Nws yog ib txheej uas muaj nyob nruab nrab ntawm UE thiab eNB thiab muaj nyob rau theem IP. Kev ua haujlwm ntawm lub RRC yog coj los ntawm a xeev tshuab uas txhais tej yam tshwj xeeb xeev tias UE tuaj yeem nyob hauv.
Kuj nug, UMTS network txuas txhais li cas?
UMTS (Universal Mobile Telecommunications Service) yog ib tiam thib peb (3G) broadband, pob ntawv-raws li kis tau tus mob ntawm cov ntawv nyeem, digitized suab, video, thiab multimedia ntawm cov ntaub ntawv tus nqi mus txog 2 megabits ib ob (Mbps). UMTS yog ua raws li Ntiaj Teb System for Mobile (GSM) kev sib txuas lus tus qauv.
Puas yog Wcdma 3g?
Yog lawm, WCDMA yog FDD version ntawm UMTS (qhov nrov tshaj plaws 3 G technology nyob rau hauv lub ntiaj teb no). UMTS sib koom tib lub core network li GSM, tab sis nws yog ib qho kev siv tshuab sib txawv.
Pom zoo:
W3c yog dab tsi Whatwg yog dab tsi?
Lub Web Hypertext Application Technology Working Group (WHATWG) yog ib lub zej zog ntawm cov neeg nyiam hloov kho HTML thiab lwm yam technologies. WHATWG tau tsim los ntawm cov tib neeg los ntawm Apple Inc., Mozilla Foundation thiab Opera Software, ua tus neeg muag khoom Web browser, hauv 2004
Yuav ua li cas yog ib tug txheej txheem nyob rau hauv lub operating system dab tsi yog ib tug xov nyob rau hauv lub operating system?
Ib tug txheej txheem, nyob rau hauv cov nqe lus yooj yim tshaj, yog ib tug executingprogram. Ib tug los yog ntau tshaj threads khiav nyob rau hauv cov ntsiab lus ntawm cov txheej txheem. Ib tug xov yog ib qho tseem ceeb chav tsev uas theoperating system faib lub sij hawm processor. Lub threadpool feem ntau yog siv los txo tus naj npawb ntawm cov ntaub ntawv thov thiab muab kev tswj hwm ntawm cov neeg ua haujlwm threads
Dab tsi yog txoj hauv kev virtual thiab txoj hauv lub cev hauv asp net?
Ua ntej tshaj, cia peb tau txais cov ntsiab lus ntawm ob qho tib si. Txoj kev lub cev - Qhov no yog txoj hauv kev tiag tiag cov ntaub ntawv nyob ntawm IIS. Txoj kev Virtual - Qhov no yog txoj hauv kev kom nkag mus rau cov ntaub ntawv uas tau taw qhia los ntawm sab nraud ntawm IIS daim ntawv thov folder
Dab tsi yog qhov tsis muaj dab tsi hauv Java?
Pej xeem txhais tau hais tias txoj kev pom thiab tuaj yeem raug hu los ntawm lwm yam khoom ntawm lwm hom. Lwm cov kev xaiv yog tus kheej, tiv thaiv, pob thiab pob-private.Qhov no txhais tau hais tias koj tuaj yeem hu rau txoj kev zoo li qub yam tsis muaj kev tsim anobject ntawm chav kawm. void txhais tau hais tias txoj kev tsis muaj nqi
Dab tsi yog cov haujlwm ntawm RNC node B hauv UMTS?
RNC tau lees paub txog kev tswj hwm xov tooj cua thiab qee qhov kev tswj hwm kev txav mus los, txawm hais tias tsis yog. Nws tseem yog lub ntsiab lus uas cov ntaub ntawv encryption / decryptionis tau ua los tiv thaiv cov neeg siv cov ntaub ntawv los ntawm eavesdropping. NodeB: Node B yog lo lus siv nyob rau hauv UMTS los qhia txog lub hauv paus chaw nres tsheb transceiver