Gateway system, device and communication method

A control plane entity located in a core network comprising a mobility management network element, the control plane entity comprising:

• a processor and a non-transitory computer-readable storage medium including computer-executable instructions executed by the processor to perform, on the control plane entity, operations comprising:
• receiving a session establishment request message from the mobility management network element;
• allocating an internet protocol (IP) address information to a user equipment (UE) after receiving the session establishment request message;
• and sending configuration information of a data path to a user plane entity located in the core network,
• wherein the configuration information of the data path comprises association information of the data path,
• wherein the data path is used for connecting the user plane entity with a radio access network (RAN), and a packet data network, and
• wherein the user plane entity is located between the packet data network and the RAN.

A communication method in a core network comprising a mobility management network element, a control plane entity and at least one user plane entity located between a packet data network and a radio access network (RAN), wherein the method comprising:

• receiving, by the control plane entity, a session establishment request message from the mobility management network element;
• allocating, by the control plane entity, an internet protocol (IP) address information to user equipment (UE) in response to the session establishment request message;
• sending, by the control plane entity, the configuration information of the data path to the user plane entity,
• wherein the configuration information of the data path comprises association information of the data path, and
• wherein the data path is used for connecting the user plane entity with a radio access network (RAN), and a packet data network;
• receiving, by the user plane entity, the configuration information of the data path sent by the control plane entity;
• and
• forwarding, by the user plane entity, data of the UE on the data path, when the data of the UE being matched with the association information of the data path.