Data transmission method and apparatus, system, and storage medium

A data transmission apparatus comprising a non-transitory memory and at least one processor, the non-transitory memory storing instructions that, when executed by the at least one processor, causes the data transmission apparatus to:

• receive, from a management function network element, a first correspondence between a first quality of service (QOS) flow and a first terminal, the first QoS flow comprising a common QoS flow between the access network device and a first user plane function network element;
• receive, from the first user plane function network element, data of a first service that is carried in the first QoS flow;
• and
• send, in a multicast manner, the data of the first service to a group of terminals corresponding to the data of the first service, the group of terminals including the first terminal and being determined based on the first correspondence received from the management function network element.

A non-transitory computer-readable storage medium having computer-executable code for data transmission by an access network device, the computer-executable code comprising computer instructions for:

• receiving, from a management function network element, a first correspondence between a first quality of service (QOS) flow and a first terminal, the first QoS flow comprising a common QoS flow between the access network device and a first user plane function network element;
• receiving, from the first user plane function network element, data of a first service that is carried in the first QoS flow;
• and
• sending, in a multicast manner, the data of the first service to a group of terminals corresponding to the data of the first service, the group of terminals including the first terminal and being determined based on the first correspondence received from the management function network element.