Page 518 - 5G Basics - Core Network Aspects

1 Core network aspects

III.3.3 Roaming architecture for EPS using S5, S2c – Local breakout

Figure III.3 shows the architecture for this case. Host-based mobility service is provided, with UE signalling
via the S2c interface.

Access network Core network
SWx
3GPP
HSS AAA server

Home Rx
Home
hPCRF operator's
S6a IP services
SWd
S9

Gxc Rx
Visited vPCRF
Gx S6b
Serving
3GPP access gateway S5 SWm 3GPP
PDN Gxb AAA proxy
gateway

SGi
Visited operator's
ePDG IP services
(IMS, etc.)

Gxa
Trusted
S2c non-3GPP STa
S2c
IP access
SWn
UE

S2c SWa
Non-trusted
non-3GPP
IP access Non-3GPP
Y.2018(09)_FIII.3

Figure III.3 – Roaming architecture for EPS using S5, S2c – Local breakout

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