Method, apparatus, and system for implementing rate adjustment at transmit end

A first network device, comprising:

• at least one processor;
• one or more memories coupled to the at least one processor and storing instructions for execution by the at least one processor, the instructions instruct the at least one processor to cause the first network device to:
• receive a first data packet sent by a previous-hop network device, the first data packet comprising a first required rate, a first deadline, and a first sending rate that correspond to a first data stream, and the first sending rate is used to indicate a minimum sending rate of the first data stream that is obtained by the previous-hop network device;
• obtain a second sending rate of the first data stream based on the first required rate and the first deadline that correspond to the first data stream, and a second required rate and a second deadline that correspond to a second data stream;
• and
• send a feedback packet to a second network device when the second sending rate is less than the first sending rate, the feedback packet comprising the second sending rate, and the feedback packet is used to instruct the second network device to inform, based on the second sending rate, a transmit end to adjust a rate for sending the first data stream.

A second network device, comprising:

• at least one processor;
• one or more memories coupled to the at least one processor and storing instructions for execution by the at least one processor, the instructions instruct the at least one processor to cause the first network device to:
• receive a feedback packet sent by a first network device, the feedback packet comprising a second sending rate, and the second sending rate is used to indicate a sending rate of a first data stream that is obtained by the first network device;
• and
• when the second sending rate is less than a third sending rate, instruct a transmit end to reduce a rate for sending the first data stream, wherein
• the third sending rate is a minimum sending rate of the first data stream that is stored by the second network device.