资料介绍
无线接口的演进，全英文 Radio Interface Evolution: Contents
f GSM & UMTS Evolution: From 2G to 4G
1
GSM & UMTS Evolution
In the same way as GSM, UMTS is undergoing a permanent evolutionary process.
Step by step different aspects of the system such as services, network architecture
and the radio interface are enhanced and additional options are integrated. This
process should be continued towards 4G and beyond.
Abbreviations used in the following:
AMR: Adaptive Multi Rate
EDGE: Enhanced Data Rates for the GSM Evolution
EFR: Enhanced Full Rate
EUDCH: Enhanced Uplink for Dedicated Channels
FR: Full Rate
GPRS: General Packet Radio Services
HR: Half Rate
HSCSD: High Speed Circuit Switched Data
HSDPA: High Speed DL Packet Access
IMS: IP Multimedia Subsystem
LCR-TDD:
我要上传