I. Overview
With the issuance of 3G licenses for the three major operators in China and the maturity of commercial 3G networks, users' demand for 3G wireless applications is also growing stronger, because 3G networks bring great convenience to users, and at the same time, they are right. Wired communication methods and improved network reliability are a good complement.
As a leading global network communication company, H3C is also at the forefront in supporting wireless 3G communication. Currently, its ICG series communication gateway supports complete 3G communication functions, including support for WCDMA, CDMA2000 and TD-SCDMA. The interface form and device model are also very rich.
The 3G access solution based on the ICG gateway refers to a communication application in which the ICG communication gateway provides uplink 3G wireless communication through an external 3G-Modem (USB interface type) or 3G wireless interface card module or as a backup or supplement of the wired communication link. the way. The main features and advantages of this wireless communication solution are:
The bandwidth of 3G wireless communication has been greatly improved, and the usability has been greatly enhanced, which has created favorable conditions for its popularization and popularization and application;
3G wireless communication satisfies the communication requirements of an application scenario that is inconvenient to acquire wired link resources or requires mobile communication, and enhances the communication adaptability of the communication gateway device;
The network covered by 3G wireless communication is a public network environment. The powerful network security and data encryption functions of the gateway device can completely eliminate the security risks of wireless communication applications.
The 3G wireless communication interface encapsulates the standard IP interface on the gateway, and has no functional and business differences with other wired interfaces, which ensures the functional perfection of 3G wireless communication.
Second, ICG Enterprise Gateway 3G typical application and networking
2.1 3G Radio Interface Applied to VPDN Network
The H3C ICG gateway is used as the L2TP client device, the gateway device of the carrier is the LAC device of the L2TP tunnel, the road gateway of the enterprise center is the LNS device of the L2TP tunnel, and the 3G gateway of the enterprise network is connected to the LAC device of the carrier through the 3G wireless network. The LNS equipment of the enterprise center is generally connected to the LAC equipment of the operator through a wired dedicated line. The following is a typical networking diagram:
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