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3ＧＰＰ目前存在两个版本 ,Ｒ99(有时也称作Ｒ3版本 )和Ｒ4版本 ,且都在不断地进行更新。其中Ｒ99是目前最成熟、最稳定的版本。Ｒ99的特点是采用基于ＧＳＭ/ＧＰＲＳ的核心网络 ,引人新的ＷＣＤＭＡ和ＣＤＭＡＴＤＤ的无线接人网络 (ＲＡＮ)。Ｒ99是 2 0 0 0年 3月在 3ＧＰＰ?
Currently there are two versions of 3GPP, R99 (sometimes referred to as R3 version) and R4 version, and are constantly updated. Which R99 is the most mature and most stable version. The R99 features a wireless access network (RAN) that incorporates new WCDMA and CDMATDD using a GSM / GPRS based core network. R99 is March 2000 in 3GPP?