4.2.2 Non-roaming Architectures for EPS

23.4023GPPArchitecture enhancements for non-3GPP accessesRelease 18TS

The following considerations apply to interfaces where they occur in figures in this and the next clause:

– S5, S2a and S2b can be GTP-based or PMIP-based.

– Gxc is used only in the case of PMIP variant of S5 or S8.

– Gxa is used when the Trusted non-3GPP Access network is owned by the same operator.

– Gxb is used only in the case of PMIP variant of S2b.

– S9 is used instead of Gxa to the Trusted non-3GPP Access network not owned by the same operator.

– Gxa or S9 are terminated in the Trusted non-3GPP Accesses if supported.

– S2c is used only for DSMIPv6 bootstrapping and DSMIPv6 De-Registration (Binding Update with Lifetime equals zero) when the UE is connected via 3GPP access. Dashed lines are used in Figure 4.2.2-2, Figure 4.2.3-3 and Figure 4.2.3-5 to indicate this case.

NOTE 1: SWu shown in Figure 4.2.2-1 also applies to architectural reference Figures 4.2.2-2 and 4.2.3-1 to 4.2.3-5, but is not shown for simplicity.

Figure 4.2.2-1: Non-Roaming Architecture within EPS using S5, S2a, S2b

NOTE 2: For S2a using a Trusted WLAN access, refer to clause 16.

Figure 4.2.2-2: Non-Roaming Architecture within EPS using S5, S2c