一种WLAN与LTE网络融合方案

A Scheme of WLAN and LTE Network Integration

3GPP23.234规范中提出研究WLAN等非3GPP接入EPC的互通架构。用户终端(UE)可以通过WLAN,以S2a、S2b或S2c等接口接入EPC。文章针对安全性低和改造复杂的问题,提出WGW-S2a融合网络架构——部署WGW网元支持EAP-AKA认证报文转发并具有MAG功能,采用EAP-SIM/AKAover802.1x实现安全的统一认证,WLAN用户接入EPC时IP地址分配由PDNGW分配。在WGW-S2a融合网络架构中,WLAN网络与EPC之间的接口仍然符合3GPP标准的S2a接口。

Interworking architectures of non-3GPP networks, e.g. WLAN, access EPC was studied in the 3GPP 23.234 technical specification. User terminal （UE） can access EPC via interfaces such as S2a, S2b or S2c. To deal with the low security and high network upgration complexity, a WGW-S2a integrated network architecture is proposed in this paper. The deployment of WGW network element supports the EAP-AKA authentication and MAG function. EAP-SIM/AKA over 802.1x is introduced to achieved security and authentication. The IP addresses are assigned by the PDN GW when WLAN users access EPC. In the WGW-S2a integrated network architecture, the interface between the WLAN network and EPC is still compliant with the S2a interface of 3GPP standards.