UE

ANDSF

1. UE connected to 3GPP Access

2. Inter-System Mobility Policy pre-provisioned in UE

3. ANDSF Discovery

4. Inter-System Mobility Policy Update

5. Evaluate non-3GPP access networks for HO

Derive: Ks_NAF

6. Access Network Information Request

7. Access Network Information Response

8. Turn ON non-3GPP radio and check availability of non-3GPP access network

9. Network Selection and HO Decision

Derive: Ks_NAF

10. Inter-system change procedure

(11) ChangeCipherSpec + Finished

SyncML messages

Policy updates

3GPP Access

Non-3GPP Access

ANDSF Discovery

Policy Update

Access Network Discovery

Network Selection

Inter-system change Procedure

ANDSF Discovery

Policy Update

Access Network Discovery

Network Selection

Inter-system change Procedure