Mobile Network Release Version

起先所谓的移动通信网络是由GSM(Global System for Mobile communication)开始的，所以最早的叫作GSM network version。

GSM Phase 1: Original GSM

GSM Phase 2: DCS 1800                                      /DCS: Digital Cellular System/

Release 96: HSCSD                                                    /HSCSD: High Speed Circuit Switched Data/

Release 97: GPRS                                                       /GPRS: General Packet Radio Service/

Release 98: EDGE                                                       /EDGE: Enhanced Data rates for GSM Evolution/

Release 99: W-CDMA (FDD and wide TDD)               /WCDMA: Wideband Code Division Multiple Access/

Release 4: Narrowband TDD (Low chip rate – TD-SCDMA)

Release 5: High Speed Downlink Packet Access (HSDPA)

Release 6: High Speed Uplink Packet Access (HSUPA)

Release 后面的数字可以理解为年代。到Release 98之前可以简单的把移动通信系统称为GSM network，因为GSM是那个时候的绝对代表；

从Release 99以后，一般把GSM去掉，叫Release 99 network或者干脆 Release 99。

所以我们需要明白，听到release 97后，就知道是提到GPRS了。