Session processing method and device

A session processing method providing control to a data network of a packet data unit session based on detecting an abnormal status so that the packet data unit session can be deleted or modified by the data network, the method comprising:

• receiving, by a data-network network element in the data network for authenticating and authorizing the packet data unit session, a data network access request sent by a session management function network element (SMF) for establishing and managing the packet data unit session of the UE,
• wherein the data network access request comprises an identifier of user equipment (UE) and a session address to be used by the UE, and
• wherein the SMF is a control plane network element in the data network;
• sending, by the data-network network element, a response message to the SMF, wherein the response message instructs the SMF to allow the UE to access the data network, so that the SMF establishes the packet data unit session of the UE;
• and
• detecting, by the data-network network element based on the session address or the identifier of the UE, that the packet data unit session of the UE needs to be processed, generating a session processing request, and instructing, by using the session processing request, the SMF to process the packet data unit session of the UE.

A session management function network element (SMF) in a data network and responsible for establishing and managing a packet data unit session of a user equipment (UE), the SMF comprising:

• a processor in communication a storage medium that includes one or more executable instructions for execution by the processor;
• a receiver configured to cooperate with the processor to receive a session establishment request from UE user equipment;
• the processor, when executing the one or more executable instructions, is configured to determine a session address to be used by a session of the UE;
• a transmitter configured to cooperate with the processor to send a data network access request to a data-network network element in the data network for authenticating and authorizing the packet data unit session, wherein the data network access request comprises the session address and an identifier of the UE;
• the receiver is further configured to cooperate with the processor to receive a response message sent by the data-network network element, wherein the response message instructs to allow the UE to access the data network;
• and
• an processor, when executing the one or more executable instructions, is further configured to establish the packet data unit session of the UE.

A data-network network element in a data network and responsible for authenticating and authorizing a packet data unit session of a user equipment (UE), the data-network network comprising:

• a processor in communication a storage medium that includes one or more executable instructions for execution by the processor;
• a receiver configured to cooperate with the processor to receive a data network access request sent by a session management function network element (SMF) in the data network and responsible for establishing and managing the packet data unit session, wherein the data network access request comprises an identifier of user equipment UE and a session address to be used by the UE;
• a transmitter configured to cooperate with the processor to send a response message to the SMF, wherein the response message instructs the SMF to allow the UE to access a data network, so that the SMF establishes the packet data unit session of the UE;
• the processor, when executing the one or more executable instructions, is configured to:
• detect, based on the session address or the identifier of the UE, that the packet data unit session of the UE needs to be processed, and
• generate a session processing request when the detection unit detects that the packet data unit session of the UE needs to be processed and
• the transmitter further configured to cooperate with the processor to instruct, by using the session processing request, the SMF to process the packet data unit session of the UE.