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简述了GPRS中数据传输的情况 ,介绍了GPRS隧道的特点和涉及的 3个重要规程 ,最后给出了用户数据通过隧道传输的各种情况。
The situation of data transmission in GPRS is briefly introduced. The characteristics of GPRS tunnel and the three important rules involved are introduced. Finally, the various situations of user data transmission through tunnel are given.