Communication method and apparatus

A communication system, comprising a session management function (SMF) and a first management network element,

• wherein the session management function is configured to:
• receive a first message from a first terminal apparatus, wherein the first message is used to request the session management function to establish a first session for the first terminal apparatus, the first message is further used to indicate that the first session is used for communication between the first terminal apparatus and a second terminal apparatus, wherein the first message comprises an identifier of the second terminal apparatus;
• send a second message including the identifier of the second terminal apparatus to the first management network element;
• receive address information of the second terminal apparatus sent by the first management network element;
• determine a rule according to the address information of the second terminal apparatus, wherein the rule is used to indicate a routing rule from the first terminal apparatus to the second terminal apparatus and/or a data packet filtering rule between the first terminal apparatus and the second terminal apparatus;
• and
• send the rule to a user plane function corresponding to the first terminal apparatus for supporting communication between the first terminal apparatus and the second terminal apparatus by performing routing and/or data packet flow identification according to the rule at the user plane function;
• wherein the first management network element is configured to:
• receive the second message;
• and
• send the address information of the second terminal apparatus to the session management function.

A communication apparatus, comprising:

• a memory, and
• a processor, wherein
• the memory is configured to store a computer program;
• and
• the processor is configured to invoke the computer program from the memory and run the computer program to:
• receive a first message from a first terminal apparatus, wherein the first message is used to request the communication apparatus to establish a first session for the first terminal apparatus, the first message is further used to indicate that the first session is used for communication between the first terminal apparatus and a second terminal apparatus, wherein the first message comprises an identifier of the second terminal apparatus;
• send a second message including the identifier of the second terminal apparatus to the first management network element;
• receive address information of the second terminal apparatus from the first management network element;
• determine a rule according to the address information of the second terminal apparatus, wherein the rule is used to indicate a routing rule from the first terminal apparatus to the second terminal apparatus and/or a data packet filtering rule between the first terminal apparatus and the second terminal apparatus;
• and
• send the rule to a user plane function corresponding to the first terminal apparatus for supporting communication between the first terminal apparatus and the second terminal apparatus by performing routing and/or data packet flow identification according to the rule at the user plane function.

A communication method, comprising:

• receiving, by the first management network element, address information of first terminal apparatus from a session management function, wherein the address information of the first terminal apparatus indicates an address of the first terminal apparatus;
• receiving, by the first management network element, a second message including identifier of second terminal apparatus from the session management function, wherein a first session is to be established for communication between the first terminal apparatus and the second terminal apparatus;
• and
• sending, by the first management network element, address information of the second terminal apparatus to the session management function.

A communication apparatus, comprising a memory, and a processor, wherein

• the memory is configured to store a computer program;
• and
• the processor is configured to invoke the computer program from the memory and run the computer program to:
• receive address information of first terminal apparatus from a session management function, wherein the address information of the first terminal apparatus indicates an address of the first terminal apparatus;
• receive a second message including identifier of second terminal apparatus from the session management function, wherein a first session is to be established for communication between the first terminal apparatus and the second terminal apparatus;
• and
• send address information of the second terminal apparatus to the session management function.