中国在3G移动通信和未来的展望及 TD - SCDMA技术

中文字数:4836,中文页数:7  英文字数:3041 页数:11

摘要
 中国作为最大的发展中国家，在世界上已成为一个移动通信普及率增长最快的国家，超过美国成为最大的单一移动电话市场的用户人群。最近成功加入世界贸易组织（ WTO ）已为中国进一步发展增添的新势头，包括其移动通信基础设施和国际竞争力，以及在移动通信市场方面。自开放其经济，中国已经花费了数十亿美元从国外电信制造商购买设备，创造了一个沉重的现代化负担。这时我国的情况是急于改变。 TD - SCDMA标准由我国的CWTS向国际电联于1998年提出，为了使我国等同于其他发达国家的移动通信系统的发展，也使国家越来越少地依赖于国外厂商。该提案是国际电联批准的候选之一，在2000年5月准许，由3GPP在2001年3月接受。 TD - SCDMA标准使用了TDD的同步CDMA技术，提供多种业务。例如，它可以让现有的GSM核心网络升级为TD-SCDMA平台沿一个相对容易的道路。因此，它使得非常具有吸引力的地区的服务提供商可以在世界范围内运作GSM系统。 TD - SCDMA标准已经得到了中国政府充分祝福，必将发挥关键作用，移动通信在我国的发展以及在世界上的影响不应该被低估。

ABSTRACT
 China, as the largest developing country in the world, has been emerging as a nation with the fastest penetration rate growth in mobile communications, exceeding the United States to become the largest single mobile cellular market in terms of subscriber population. The recent successful admission to the World Trade Organization (WTO) has given China new momentum for further development of its mobile communications infrastructure and fueled international competition as well in the mobile communication market of the country. Since the opening up of its economy, China has spent billions of dollars to purchase equipment from foreign        telecommunicatiomanufacturers, which has created a heavy burden to modernize its legacy industrial sectors. This is the situation China is eager to change. The TD-SCDMA standard was proposed by the CWTS of China to ITU in 1998 as an effort to bring China on a par with other developed countries in mobile communications system development and also to make the country less dependent on foreign vendors. The proposal was approved by ITU as one of the candidate standards for 3G mobile communications in May 2000 and accepted by 3GPP in March 2001. The TD-SCDMA standard makes use of TDD synchronous CDMA technology and offers several operational advantages.For instance, it allows the existing GSM core networks to be upgraded to the TDSCDMA platform along a relatively easy path. Therefore, it can be very attractive to serviceproviders in regions where worldwide popular GSM system is in operation. The TD-SCDMA standard has received the full blessing of the Chinese government and will surely play a critical role in mobile communications development in China as well as in the world; its impact should never be underestimated.

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