Packet transmission method, apparatus, device, and readable storage medium

A packet transmission method, comprising:

• obtaining, by a first network device, a second packet in a target packet flow, and obtaining a first dwell time period of the second packet on the first network device, wherein the first dwell time period is a time difference between a first moment at which the second packet enters a queuing system of the first network device and a second moment at which the second packet is sent by the first network device after being queued in the queuing system of the first network device;
• obtaining a second dwell time period of the target packet flow on the first network device, wherein the second dwell time period is an upper threshold for a period of dwelling of the target packet flow on the first network device;
• encapsulating the second packet, the first dwell time period, and the second dwell time period, to obtain a first packet;
• and
• sending the first packet to a second network device.

A packet transmission apparatus, comprising:

• one or more processors;
• and
• a non-transitory computer-readable memory storing instructions that, when executed by the one or more processors, cause the apparatus to perform operations, the operations comprising:
• receiving a first packet sent by a first network device;
• obtaining a second packet in a target packet flow, a first dwell time period of the second packet on the first network device, and a second dwell time period of the target packet flow on the first network device based on the first packet, wherein the first dwell time period is a time difference between a first moment at which the second packet enters a queuing system of the first network device and a second moment at which the second packet is sent by the first network device after being queued in the queuing system of the first network device;
• determining a time difference between the second dwell time period and the first dwell time period, wherein the time difference is an active delay time period of the second packet;
• obtaining a third dwell time period of the second packet and a fourth dwell time period of the target packet flow, wherein the third dwell time period is a time difference between a third moment at which the second network device ends an active delay of the second packet and a fourth moment at which the second packet is sent after being queued in a queuing system;
• encapsulating the third dwell time period and the second packet to obtain a third packet;
• and
• send the third packet to a next-hop network device on a core network transmission path of the target packet flow after the first packet received reaches the active delay time period and is queued in the queuing system.