Communication method, apparatus, and system

A communication method, comprising:

• receiving, by an access network device, a data packet from a user plane function network element;
• obtaining, by the access network device, delay budget information of the data packet;
• and
• sending, by the access network device, the data packet to a terminal device based on the delay budget information of the data packet, wherein
• the delay budget information of the data packet is carried in the data packet, the delay budget information of the data packet is determined based on a time point at which the user plane function network element receives the data packet and a time point at which the user plane function network element receives the data packet set.

A communication apparatus, comprising a processor and a memory, wherein the memory is coupled to the processor, the memory is configured to store program instructions, and the processor is configured to execute the program instructions to implement:

• receiving a data packet;
• obtaining a receiving time point of a data packet set to which the data packet belongs;
• determining delay budget information of the data packet based on a receiving time point of the data packet and the receiving time point of the belonging data packet set;
• and
• adding the delay budget information of the data packet to the data packet.