3G有两个有利的而优势：宽带语音通信和易IP为基础的服务。综合在一起,这些为先进的移动英特网服务奠定了基础,包括个性化的入口,你的手机将会自动接收最新的电视信息,提供高品质的声音和图像。使3G变为事实需要依靠不同地区相关技术的发展。它在改善介绍无线通信分界面,支持多频率通信扮演了重要的角色。
General Packet Radio Service (GPRS) is an enhancement to existing GSM and TDMA networks that introduces packet data transmission, enabling "always on" mobility. This means that users can choose to be permanently logged on to e-mail, Internet access and other services, but do not have to pay for these services unless sending or receiving information. When EDGE is added to GPRS, these data rates will increase up to 384kbit/ S.
GPRS will be implemented by adding new packet data nodes and upgrading existing nodes to provide a routing path for packet data between the mobile terminal and a gateway node. The gateway node will provide inter working with external packet data networks for access to the Internet and intranets.
Benef1ts
Faster data speeds and "always on" mobility
Almost instantaneous connection set-up
Connection to an abundance of data sources around the world, through support for multi plc protocols, including IP
A step towards full 3G services.
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WCDMA
Wideband Code Division Multiple Access (WCDMA) is a \ ride band radio tecl7nique that provides far higher data rates than other radio techniques available today, up to 2Mbit/ s, and highly efficient use of radio spectrum.
The higher b8indwidth that WCDMA provides \ 11 deliver the Rill potential of 3G. For example, WCDMA allows simultaneous access to several voice, video and data services at once.
WCDMA is fully compliant with IMT-2000 and is th6 air interface technology for standards in the 2GHZ bandwidth (the IMT-2000 core band), known as UATS
(Universal Mobile Telecommunication System\} in Europe and ARJB (Association of Radio Industry Businesses) in Japan.
Ericsson has been at the forefront of WCDMA development. The company delivered an experimental WCDMA system to NTT DO COMO in Japan back in 1998. Ericsson has also set up WCDMA t6st systems around the world. At 2000, Ericsson announced its first family of WCDMA base stations.