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Wideband CDMA (WCDMA) technology is used in the air interface of the UTRAN (UMTS Terrestrial Radio Access Network) . WCDMA systems are IMT-2000, UMTS (Universal Mobile Telecommunications System) in three different wireless interface program of one of the criteria is very wide in the global application . In 2009 and 2010 , Huaibei has 175 3G Network Node-B base station is built , the construction speed is very fast . 3G era , to bring mobile communications services completely changed . 3G networks based on WCDMA technology , functionally divided into three parts : UTRAN, CN and operations support systems . UTRAN by the UE, the Node-B and RNC . The user equipment UE ( e.g. iPhone3GS, iPhone4) is connected to the CS domain and PS domain , to support simultaneous use of the CS and PS services . For 3G mobile networks , the optimization of the CS and PS services is very important . By growing concern about the research in this field . First, the article briefly describes the basic network structure of the WCDMA system of the UTRAN wireless gateway key network elements RNC , Node -B , the UE function , and according to the RNC on the interface of different , Huaibei City WCDMA network business is divided into CS , PS two major classes for statistical analysis. Then , the the UTRAN several key technologies , 3G signaling and the CS , PS business basic flow . Then discusses the 2G/3G interoperability analysis HSDPA, HSUPA, 3G chamber the grading network optimization topics are some examples of network optimization case . Finally, make a summary of work to do and will the Huaibei City WCDMA follow UTRAN radio network optimization arrangements .
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