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介绍了3G业务的分类和IMSIP多媒体子系统,探讨了3G时代的差异化竞争问题,阐述了IMS对3G应用创新的价值所在。
Introduced the classification of 3G services and IMSIP multimedia subsystem, explored the differentiated competition in 3G era, and explained the value of IMS for 3G application innovation.