Service data transmission method and communication apparatus

A service data transmission method, comprising:

• obtaining, by a terminal, first information of a multicast broadcast service session, wherein the first information indicates that the terminal has joined the multicast broadcast service session;
• and
• sending, by the terminal, the first information to an application server.

A communication apparatus, comprising at least processor coupled with a non-transitory storage medium storing executable instructions that, when executed by the at least processor, cause the communication apparatus to:

• obtain first information of a multicast broadcast service session, wherein the first information indicates that at least one terminal has joined the multicast broadcast service session, and the at least one terminal belongs to a group corresponding to the multicast broadcast service session;
• and
• send service data over the multicast broadcast service session based on the first information.

A communication apparatus, comprising at least processor coupled with a non-transitory storage medium storing executable instructions that, when executed by the at least processor, cause the communication apparatus to:

• obtain first information of a multicast broadcast service session, wherein the first information indicates that a terminal has joined the multicast broadcast service session;
• and
• send the first information to an application server.