Session establishment method and device

A session establishment method implemented via a session management function entity, the method comprising:

• receiving, by the session management function entity, a broadcast quality report message, that includes a packet data unit (PDU) session establishment request message, from a terminal in association with a determination that the terminal fails to receive broadcast data on a broadcast path, wherein
• the PDU session establishment request message requests to establish a PDU session for the terminal,
• the PDU session uses a unicast path,
• the broadcast quality report message carries broadcast received quality information indicating that the terminal fails to receive the broadcast data on the broadcast path;
• sending, by the session management function entity to the terminal, a response to the broadcast report quality message including information about a quality of service (QoS) flow corresponding to the PDU session and an identifier associated with the broadcast session;
• and
• establishing, by the session management function entity, the PDU session with the terminal based on the information about the QoS flow and the identifier associated with the broadcast session included in the response, wherein
• the response is used to ensure that a user data plane is consistent on the broadcast path and the unicast path when using the broadcast path and the unicast path, and
• the terminal receives broadcast data transmitted via the PDU session.

An apparatus, comprising:

• a processor;
• and
• a memory configured to store computer readable instructions that, when executed by the processor, cause the apparatus to:
• determine that a terminal fails to receive broadcast data on a broadcast path;
• send a broadcast quality report message, that includes a packet data unit (PDU) session establishment request message, to a session management function entity based on determining that the terminal fails to receive the broadcast data on the broadcast path, wherein
• the PDU session establishment request message requests to establish a PDU session for the terminal,
• the PDU session uses a unicast path, and
• the broadcast quality report message carries broadcast received quality information indicating that the terminal fails to receive the broadcast data on the broadcast path;
• receive, from the session management function entity, a response to the broadcast report quality message including information about a quality of service (QoS) flow corresponding to the PDU session and an identifier associated with the broadcast session;
• and
• establish the PDU session with the session management function entity based on the information about the QoS flow and the identifier associated with the broadcast session included in the response, wherein
• the response is used to ensure that a user data plane is consistent on the broadcast path and the unicast path when using the broadcast path and the unicast path, and
• the terminal receives broadcast data transmitted via the PDU session.

An apparatus, comprising:

• a processor;
• and
• a memory configured to store computer readable instructions that, when executed by the processor, cause the apparatus to:
• receive a broadcast quality report message, that includes a packet data unit (PDU) session establishment request message, from a terminal in association with a determination that the terminal fails to receive broadcast data on a broadcast path, wherein
• the PDU session establishment request message requests to establish a PDU session for the terminal,
• the PDU session uses a unicast path, and
• the broadcast quality report message carries broadcast received quality information indicating that the terminal fails to receive the broadcast data on the broadcast path;
• send, to the terminal, a response to the broadcast report quality message including information about a quality of service (QoS) flow corresponding to the PDU session and an identifier associated with the broadcast session;
• and
• establish the PDU session with the terminal based on the information about the QoS flow and the identifier associated with the broadcast session included in the response, wherein
• the response is used to ensure that a user data plane is consistent on the broadcast path and the unicast path when using the broadcast path and the unicast path, and
• the terminal receives broadcast data transmitted via the PDU session.