The S2c interface can provide user plane and related control and mobility support between the mobile and the PDN-GW. The interface can be implemented over trusted and/or untrusted non-3GPP access and/or 3GPP access. The protocol over the S2c interface is based on DSMIPv6.The purpose of DSMIPv6 is to establish, manage and tear down a mobility tunnel between the UE and the HA function which resides within the PDN-GW.
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