UMTS
UMTS
UMTS (Universal Mobile Telecommunications System) - IMT2000.
UMTS , , . 144 / ( 120 /), 384 / ( 3 /) 2,048 /. UMTS GSM , GSM. UMTS, , , GSM. UMTS 2 , GSM , , . 35: 1935-1980 2125-2170 15 , 2010-2025 - 5 .
UMTS
1985 ., FPLMTS (Future Public Land Mobile Telecommunications Systems). , . 1992 . (WARC-92 World Administrative Radio Conference) .
1995 . cdmaOne;
1998 . CDMA2000 IMT-2000;
1999 . CDMA . GSM Alliance Nortel Networks;
2000 . UMTS;
2001 . TD-SCDMA (Time Division Synchronous CDMA) ;
2001 . NTT DoCoMo W-CDMA (Wideband Code Division Multiple Access);
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2001 . NTT DoCoMo 3G ( WCDMA) ;
2001 . Nokia AT&T Wireless 3G EDGE;
2001 . Nortel Networks Vodafone ( Vodafone) ( J-Phone), UMTS 3GPP. QUALCOMM MSM5200 SIM J-Phone;
2003 . LG , CDMA WCDMA;
2003 . CDMA2000 30 .
GSM UMTS
ETSI 3GPP UMTS GSM. GSM , UMTS , IP - . :
GSM c , , , GPRS;
UMTS, GSM ;
IP- , , , ;
UMTS 3G:
, 10-15 ( 2G );
GSM UMTS;
GSM UMTS ;
UMTS UMTS, .
, UMTS GSM , , GSM-UMTS. 3G ( , ) , .
UMTS GPRS GSM. GPRS GSM 3- .
, GPRS UMTS. . :
(GGSN), (MSC);
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GPRS (SGSN), MSC;
BSS, (PCU);
UMTS . :
1) ;
2) ;
3) / .
3- .
UMTS
UMTS , , , , , IP (VoIP), . , , . , , , : IP- (IMS).
1.1 .
1.1 -
, / | |
12,2 | , RichVoice- , ( ) |
. , | |
. .
, . . , -. , .