GPRS通用分组无线业务是一种全新的业务,是移动通信和数据通信结合的产物。GPRS使用户能够在端到端分组传送模式下发送和接收数据,GPRS业务具有建链时间短,数据速率高,费用低等特点,同时在无线资源利用率上也有一定的提高。主要介绍GPRS中的Gn、Gi、Gp接口、IP地址的划分原则以及利用IP地址的划分设置防火墙。 GPRS general packet radio service is a new business, is a combination of mobile communications and data communications products. GPRS enables users to send and receive data in end-to-end packet transmission mode. GPRS services have the advantages of short construction time, high data rate and low cost. Meanwhile, there is also some improvement in the utilization of radio resources. The main introduction GPRS Gn, Gi, Gp interface, the principle of the division of IP addresses and the use of IP address division set up a firewall.