Terminal device, PGW, and TWAG
摘要
說明書
Therefore, the UE 10 and the TWAG 74 may perform transmission/reception without including the TFT in the PDN connectivity request and/or the PDN connectivity response (PDN Connectivity Accept), and establish the multi-access PDN connection based on the NBIFOM. In other words, at a point in time when the PDN connection is established, there may be no IP flow transmitting/receiving user data by using the PDN connection. In this case, the UE 10 and the TWAG 74 transmit the TFT after the multi-access PDN connection based on the NBIFOM is established.
More specifically, when the PDN connection of the UE-Initiated mode is established, the UE 10 may transmit the TFT to the TWAG 74. In addition, the TWAG 74 receives the TFT from the UE 10 and transmits the TFT to the PGW 30. Thus, the UE 10 and the PGW 30 can determine a PDN connection and/or a transfer path (such as an EPS bearer) for transmitting/receiving the IP flow by using the TFT, and transmit/receive user data corresponding to the IP flow identified by the TFT.
On the other hand, when the PDN connection of the Network-Initiated mode is established, the PGW 30 may transmit the TFT to the TWAG 74. Here, the PGW 30 may receive, from the PCRF 60, the TFT determined based on the operator policy. In addition, the TWAG 74 receives the TFT from the PGW 30 and transmits the TFT to the UE 10. Thus, the UE 10 and the PGW 30 can determine a PDN connection and/or a transfer path (such as an EPS bearer) for transmitting/receiving the IP flow by using the TFT, and transmit/receive user data corresponding to the IP flow identified by the TFT.
