Terminal device, PGW, and TWAG
摘要
說明書
Note that the PGW_A 1310 may be a gateway device selected by using the APN 1. The PGW_B 1320 may be a gateway device selected by using the APN 2. Moreover, the PGW_A 1310 and the PGW_B 1320 may be the PGW 30. Furthermore, the selection of gateway using the APN 1 and/or the APN 2 may be performed by the TWAG 74 included and arranged in the access network B and/or the MME 40 included and arranged in the core network 90.
In addition, the gateway device selected by using the APN 1 and the gateway device selected by using the APN 2 may be the same gateway device. In this case, the PGW_A 1310 and the PGW_B 1320 may be the same device.
Note that the second PDN connection may be constituted of a transfer path between the UE 10 and the PGW 30 through the access network B. Thus, the second PDN connection may be constituted of a transfer path that is a combination of a transfer path between the UE 10 and the TWAG 74 and a transfer path between the TWAG 74 and the PGW_B 1320. Here, the transfer path may be a bearer.
As described above, in the first state early stage, the UE 10 may be in a state of being connected to the core network 90 via the access network B.
Note that the UE 10 need not be connected to the core network 90 via the access network A. In other words, the UE 10 need not perform an attach through the LTE access network.
Alternatively, the UE 10 may be in a state of being connected to the core network 90 via the access network A. In this case, the UE 10 may perform an attach procedure initiated by the UE 10 to establish a third PDN connection.
