Patent ID: 8769647

Claim:
A method for accessing a 3G network, comprising the following step of: a terminal accessing a wireless local area network (WLAN) by adopting a Wireless Local Area Network Authentication Privacy Infrastructure (WAPI) protocol, wherein said terminal has no capability to read a Universal Integrated Circuit Card (UICC) such as a Subscriber Identity Module (SIM) card, and a WAPI terminal certificate of the terminal is used in access authentication of the access process; after said terminal successfully accesses said WLAN, said terminal notifying an Authentication Authorization Accounting (AAA) server of a 3G network through an access point (AP) of the WLAN that said terminal intends to access the 3G network; said AAA server obtaining identity information of said terminal recorded in said WAPI terminal certificate of the terminal through said AP, determining that said terminal is a subscription terminal of the 3G network according to said identity information, and then performing an Extensible Authentication Protocol-Transport Layer Security (EAP-TLS) negotiation process with said terminal through the said AP, wherein during the EAP-TLS negotiation process, a TLS certificate massage sent from said terminal to said AAA server through said AP contains said WAPI terminal certificate; and said terminal accessing the 3G network after finishing the EAP-TLS negotiation process.