3G UTRAN Document very useful

3rd Generation Partnership Project Technical Specification Group Radio Access Network High Speed Downlink Packet Access Overall UTRAN Descr iption (Release 5)

它介绍了UTRAN接口协议和功能，小区相关流程分析，系统信息流程分析，呼叫建立和释放流程分析等-It describes the UTRAN interface protocols and functions, community-related process analysis, process analysis system information, call setup and release process analysis, etc.