Next, the configuration of the HSS 55 will be described.
The control unit 500 is a function unit for controlling the HSS 55. The control unit 500 implements various processes by reading out and executing various programs stored in the storage 540.
The IP mobile communication network interface unit 520 is a function unit through which the HSS 55 is connected to the MME 40 and/or another MME 40, and the AAA 55.
The storage 540 is a function unit for storing programs, data, and the like necessary for each operation of the HSS 55. The storage 540 is constituted of, for example, a semiconductor memory, a Hard Disk Drive (HDD), or the like.
As illustrated in