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第三代移动通信——3G,是包括标准的制定、系统网络、终端及应用开发等在内的一个整体概念,其鲜明特点是高速度、多媒体、个性化。3G采用CDMA和分组交换技术,其传输速率可由现有网络如GSM的9600kbit/s上升至2Mbit/s,从而实现随时随地的移动互联网接入,这将为更多的应用带来无限的发展空间。第三代移动通信系统的出现,不仅提高了承载高速移动数据和高速多媒体业务的能力,而且为在我国移动通信市场引入新的竞争和发展移动通信产业带来了机遇。我国现有的移动用户总数已经超过了1.6亿,且每年以净增6000万户左右的速度在发展。由此推测,到2005年我国的移动通信用户数可能超过3亿。而由移动通信产业带动的相关产业的产值可能超过10万亿元人民币,其中,3G市场的产值最少也在1万亿元以上。由此可见,我国发展3G业务市场的潜力非常巨大。为了使读者了解当前3G发展所面临的问题及其技术进展,我们特别邀请了信息产业部电信传输研究所的王志勤和万屹同志作为我刊“第三代移动通信(3G)”专题的总策划。本专题从3G业务平台的整合与开放、3G网络及其使用的技术、3G核心网的网管、3G网络的安全体系结构和QoS以及现有移动通信网络如何向3G网络过渡等方面,全面介绍了3G在目前的发展情况。在此,真诚感谢王志勤和万屹同志给予
The third generation mobile communication - 3G, is a whole concept including standard formulation, system network, terminal and application development. Its distinctive features are high speed, multimedia and personalization. 3G uses CDMA and packet switching technology, the transmission rate from the existing network such as GSM 9600kbit / s up to 2Mbit / s, so as to achieve anytime, anywhere mobile Internet access, which will bring more applications for unlimited space for development . The emergence of the third generation mobile communication system not only improves the ability to carry high-speed mobile data and high-speed multimedia services, but also brings opportunities for introducing new competition and developing mobile communication industry in China’s mobile communication market. The total number of mobile subscribers in China has exceeded 160 million and is growing at a net increase of 60 million every year. It is speculated that by 2005 China’s mobile communications users may be more than 300 million. The output value of relevant industries driven by the mobile communications industry may exceed 10 trillion yuan, of which the output value of the 3G market is at least 1 trillion yuan. Thus, our potential for developing the 3G services market is huge. In order to help readers understand the current 3G development problems and technological progress, we specially invited Wang Zhijin and Wan Yi from Institute of Telecommunication Transmission of the Ministry of Information Industry as the master plan of the third generation mobile communication (3G) project . This topic introduces the integration and opening up of 3G service platform, the technology of 3G network and its use, the network management of 3G core network, the security architecture and QoS of 3G network and the transition from existing mobile communication network to 3G network. 3G in the current development. Here, I sincerely thank Wang Zhiqin and Comrade Wan Yi for giving