Communication system, communication method, and apparatus thereof

A communications method, comprising:

• sending, by a multicast session management network element, a first multicast session request to an access and mobility management network element, wherein the first multicast session request carries a multicast session context, and the first multicast session request is used to request to establish a multicast session based on the multicast session context;
• and
• sending, by the multicast session management network element, a second multicast session request to a user plane function network element, wherein the second multicast session request carries user plane forwarding-related information, and the user plane forwarding-related information is used to indicate a user plane forwarding rule of the multicast session.

A communications method, comprising:

• receiving, by a user plane function network element, a multicast session request from a multicast session management network element, wherein the multicast session request carries user plane forwarding-related information;
• and
• establishing, updating, reconfiguring or installing, by the user plane function network element, a user plane forwarding rule of a multicast session based on the user plane forwarding-related information.

A non-transitory computer readable storage medium comprising instructions which, when executed by one or more processors for providing system configurations, cause the one or more processors to perform operations comprising:

• sending a first multicast session request to an access and mobility management network element, wherein the first multicast session request carries a multicast session context, and the first multicast session request is used to request to establish a multicast session based on the multicast session context;
• and
• sending a second multicast session request to a user plane function network element, wherein the second multicast session request carries user plane forwarding-related information, and the user plane forwarding-related information is used to indicate a user plane forwarding rule of the multicast session.

A non-transitory computer readable storage medium comprising instructions which, when executed by one or more processors for providing system configurations, cause the one or more processors to perform operations comprising:

• receiving a multicast session request from a multicast session management network element, wherein the multicast session request carries user plane forwarding-related information;
• and
• establishing, updating, reconfiguring or installing a user plane forwarding rule of a multicast session based on the user plane forwarding-related information.