S2a S2b S2c接口
S2a It provides the user plane with relatedcontrol and mobility support between trusted non 3GPP IP access andthe Gateway.可信non-3GPP中,TWAG与3GPP网关PDNGW之间接口。现网中最常用的方式 S2b Itprovides the user pla
S2a
可信non-3GPP中,TWAG与3GPP网关PDNGW之间接口。现网中最常用的方式
S2b Itprovides the user plane with related control and mobility supportbetween ePDG and the Gateway.
非可信non-3GPP中ePDG与3GPP网关PDNGW之间的接口
S2c
终端与3GPPSGW和PDG之间接口,S2c终端采用DSMIPv6协议,提供UE和PDN GW之间的DSMIP隧道连接,这样UE和EPC网络交互的数据可以实现透传,这是一种基于终端的切换,目前网络中基本不使用
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