Terminal device, PGW, and TWAG
摘要
說(shuō)明書(shū)
The present invention relates to a terminal device and the like.
The 3rd Generation Partnership Project (3GPP), which undertakes activities for standardizing recent mobile communication systems, is in the process of creating specifications for the Evolved Packet System (EPS), which realizes an all-IP architecture (see NPL 1). The EPS is a mobile communication system through which mobile operators and the like provide mobile telephone services, and is structured including a core network called the Evolved Packet Core (EPC), an access network based on the radio communication standard called the Long Term Evolution (LTE), and the like.
Furthermore, in the process of creating specifications for the EPS by the 3GPP, the Network-based IP Flow Mobility (NBIFOM) has been discussed (see NPL 1). The NBIFOM is a technical item that allows one device to simultaneously utilize a 3GPP interface and an interface other than the 3GPP interface (for example, WLAN).
In the related art, one PDN connection accommodates a communication path, a bearer, or a transfer path through either a 3GPP access network (for example, LTE access network) or a non-3GPP access network (for example, WLAN access network).
With the NBIFOM, a state can be maintained in which one PDN connection simultaneously accommodates a bearer, a communication path, or a transfer path through the 3GPP access network and a bearer, a communication path, or a transfer path through the non-3GPP access network. Such a PDN connection is defined as a multi-access PDN connection.
