| 摘要 |
A solution for providing a data security service in a wireless communications system (S) is disclosed. In the solution, a first security association (SA1) is established between an anchor node (LMA1) located in a home operator network (N1) and a concentrator node (Ha) located in an interconnecting operator network (GRXa). In addition, a second security association (SA2, SA3, SA4, SA5) is established between an access node (MAG1, MAG2, MAG3, MAG4, MAG5) located in a roaming operator network (N2, N3, N4, N5) and the concentrator node (Ha, Hb) located in the interconnecting operator network (GRXa, GRXb). A user terminal (UE1-2, UE1-3, UE1-4, UE1-5) roaming in the roaming operator network (N2, N3, N4, N5) can then access external network services (E) by utilizing the first security association (SA1) and the second security association (SA2, SA3, SA4, SA5), respectively.
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