YBTS vs Node B
Ob leeg BTS thiab Node B yog lub mais kawg ntawm lub network uas ua cov cim thiab cov ntaub ntawv ua ntej xa los ntawm cov kav hlau txais xov mus rau huab cua interface. Node B ua li ntawd rau UMTS (Universal Mobile Telecom System) lossis lwm yam kev siv wireless thib peb thaum BTS ua tib yam rau GSM (Lub Ntiaj Teb Txheej Txheem rau Kev Sib Txuas Lus), CDMA (Code Division Multiple Access), lossis lwm tiam thib ob wireless technology.. Ob leeg BTS thiab Node B yog lub cev nyob hauv thaj chaw thaj chaw deb thiab muab cov teeb liab kev pab cuam rau cov cheeb tsam ntawd.
YBTS yog dab tsi?
BTS tseem hu ua Base Transceiver Station lossis Radio Base Station (RBS) lossis yooj yim Base Station (BS), feem ntau. Feem ntau lo lus BTS raug xa mus rau txhua qhov chaw nres tsheb ntawm ib qho kev siv wireless, tab sis nws yog siv ntau dua rau lub hauv paus chaw nres tsheb ntawm 2nd Generation wireless technologies xws li GSM thiab CDMA. BTS yog ib feem ntawm BSS (Base Station Subsystem) uas txuas nrog BSC (Base Station Controller) ntawm Abis interface thiab txuas nrog UE (Cov Khoom Siv Siv) lossis cov neeg siv kawg lossis handset ntawm Um wireless interface hais txog GSM. Abis interface tej zaum yuav yog E1 / T1 lossis IP hauv lub cev txheej.
BTS muaj Baseband Processing Unit, Base Station Control Function (BCF), Physical Transmission Interface (E1/T1 chaw nres nkoj lossis Ethernet chaw nres nkoj), TRX (Transceiver) thiab PA (Power Amplifier), Kav hlau txais xov thiab Feeder System, Combiners, Duplexer thiab Power Supply thiab Tswb Extension Unit. Kev Ua Haujlwm thiab Kev Saib Xyuas (O&M) channel thiab teeb liab thiab cov neeg siv cov ntaub ntawv ntws los ntawm Abis interface ntawm E1 / T1 lossis IP hauv txheej txheej. Cov ntaub ntawv los ntawm BSC yog ua tiav ntawm Baseband Processing unit thiab cov ntaub ntawv ua tiav raug xa mus rau RF (Xov tooj cua zaus) hloov pauv lossis RF hloov pauv ntawm TRX thiab Fais Fab Amplifier. Tom ntej no, RF modulated cov ntaub ntawv kwj yog xa los ntawm kev sib txuas thiab duplexer rau lub kav hlau txais xov rau EM (Electro Magnetic) yoj hloov dua siab tshiab. Tom qab ntawd nws raug xa mus rau huab cua interface tom qab siv qee qhov nce ntxiv rau lub teeb liab ntawm Antenna. BCF tab tom ua qee qhov kev tswj hwm ntawm BTS thiab nws lwm txoj haujlwm, tab sis cov xov tooj cua tseem ceeb ntsig txog kev tswj hwm yog ua ntawm BSC.
Node B yog dab tsi?
Node B tseem hu ua BTS, feem ntau. Txawm li cas los xij, thaum siv nrog peb-tiam wireless technology xws li UMTS, NodeB yog lo lus raug xa mus rau BTS. Lub sij hawm Node B yog thawj zaug nrog kev qhia txog UMTS. NodeB yog ib feem ntawm UTRAN (Universal Terrestrial Radio Access Network). NodeB txuas rau RNC (Xov tooj cua Network Controller) ntawm IuB interface. Lub UE txuas nrog NodeB los ntawm huab cua interface hu ua Uu qhov twg nws tuaj yeem yog WCDMA lossis lwm yam 3G wireless technology.
IuB interface yuav yog ATM (E1 / T1 ntawm lub cev txheej), IP lossis Hybrid (ATM thiab IP). Txawm li cas los xij, muaj kev tswj hwm ntau ntxiv txuas nrog NodeB dua li BTS raws li kev ua haujlwm thiab kev tswj hwm xov tooj cua. Cov txheej txheem hloov pauv ntawm Baseband rau RF zoo ib yam li BTS thiab tsuas yog siv tshuab wireless ua rau qee qhov sib txawv.
Qhov txawv ntawm BTS thiab Node B yog dab tsi?
• BTS yog lub hauv paus chaw nres tsheb ntawm 2nd Generation wireless technologies xws li GSM thiab CDMA, tab sis Node B yog nws 3rd Generation counterpart feem ntau ntawm UMTS thiab WiMAX
• BTS txuas rau BSC ntawm Abis interface thaum NodeB txuas rau RNC ntawm IuB interface.
• Lub cev txheej txheej ntawm BTS thiab RNC yog E1 / T1 lossis IP, tab sis Node B thiab RNC muaj peev xwm ntawm Hybrid kis ntawm ATM (E1 / T1 ntawm txheej 1) thiab IP ntxiv rau BTS qhov kev txhawb nqa txoj kev sib kis.
• Node B ua ntau lub xov tooj cua thiab Baseband tswj kev ua haujlwm dua li BTS.
