Data distribution method, apparatus, and system

A communications device, comprising:

• at least one processor;
• and
• a non-transitory computer-readable storage medium coupled to the at least one processor and storing programming instructions for execution by the at least one processor, the programming instructions instruct the at least one processor to:
• receive an access policy from a session management function entity, wherein the access policy comprises flow description information, quality information of at least two links, and a data distribution policy on the at least two links;
• receive a service data flow;
• and
• in response to determining that the access policy comprises flow description information of the service data flow:
• determine link quality information of a link used for transmitting the service data flow;
• and
• distribute the service data flow on the link according to the data distribution policy, wherein the data distribution policy is a data distribution policy that is determined based on the access policy and that is corresponding to the link quality information and the flow description information of the service data flow.

A data distribution system, comprising:

• a communications device;
• and
• a session management function entity, wherein the session management function entity is configured to send an access policy to the communication device;
• and
• wherein the communications device is configured to:
• receive the access policy, wherein the access policy comprises flow description information, quality information of at least two links, and a data distribution policy on the at least two links;
• receive a service data flow;
• and
• in response to determining that the access policy comprises flow description information of the service data flow:
• determine link quality information of a link used for transmitting the service data flow;
• and
• distribute the service data flow on the link according to the data distribution policy, wherein the data distribution policy is a data distribution policy that is determined based on the access policy and that is corresponding to the link quality information and the flow description information of the service data flow.