1Market development calls for the NGN In the last decade of the 20thcentury, the popularized applicationof informatization technology (IT) thatis symbolized by the Internet andmobile communications greatly changedthe channel of people’s communicationsand 1Market development calls for the NGN In the last decade of the 20thcentury, the popularized applicationof informatization technology (IT) thatis symbolized by the Internet andmobile communications greatly changedthe channel of people’s communicationsand