| 摘要 |
Embodiments of the present invention disclose a data flow control method, and a related device and communications system. In the solutions provided in the embodiments of the present invention, a first gateway receives a first message sent by a UE through a first access network, where the first message carries first Internet Protocol IP flow identification information; the first gateway sends a second message to a packet data network gateway, and receives a third message sent by the packet data network gateway, where the third message carries third IP flow identification information, and the third IP flow identification information is used to identify an IP flow that is allowed by a network to be transmitted by the UE through the first access network and/or an IP flow that is allowed by a network to be transmitted by the UE through a second access network; and the first gateway sends a fourth message to the UE. The solutions of the embodiments of the present invention help lower a requirement on a UE capability in implementation of IP flow mobility, and make it more feasible for a system to support the feature of IP flow mobility. |
