Data Sending Method, Data Receiving Method, Data Transmit End, and Data Receive End

A data sending method, comprising:

• obtaining a transmission path used for data transmission, wherein the transmission path currently uses a first physical link group to transmit data, and the first physical link group comprises at least one physical link;
• switching, based on a preconfigured link switching policy and transmission information of the transmission path, a physical link used by the transmission path from the first physical link group to a second physical link group, wherein the second physical link group comprises at least one physical link, the second physical link group and the first physical link group have one or more same physical links, or the second physical link group and the first physical link group have no same physical link, and the transmission information comprises information obtained by monitoring the first physical link group used by the transmission path;
• sending a first link switching notification message to a data receive end, wherein the first link switching notification message comprises information indicating that the physical link used by the transmission path is switched from the first physical link group to the second physical link group;
• and
• continuing transmitting the data through a transmission path that uses the second physical link group.

A data receiving method, comprising:

• receiving a first link switching notification message sent by a data transmit end, wherein the first link switching notification message comprises information indicating that a physical link used by a transmission path of the data transmit end is switched from a first physical link group to a second physical link group, the transmission path currently uses the first physical link group to transmit data, the first physical link group comprises at least one physical link, the second physical link group comprises at least one physical link, and the second physical link group and the first physical link group have one or more same physical links, or the second physical link group and the first physical link group have no same physical link;
• switching a physical link used by a transmission path of data receive end from the first physical link group to the second physical link group;
• and
• continuing receiving the data through a transmission path that uses the second physical link group.

A data transmit end, comprising at least one processor and a memory, wherein

• the memory is configured to store a program, an instruction, and data;
• and
• the processor invokes the program, the instruction, and the data in the memory, to perform the following steps:
• obtaining a transmission path used for data transmission, wherein the transmission path currently uses a first physical link group to transmit the data, and the first physical link group comprises at least one physical link;
• switching, based on a preconfigured link switching policy and transmission information of the transmission path, a physical link used by the transmission path from the first physical link group to a second physical link group, wherein the second physical link group comprises at least one physical link, the second physical link group and the first physical link group have one or more same physical links, or the second physical link group and the first physical link group have no same physical link, and the transmission information comprises information obtained by monitoring the first physical link group used by the transmission path;
• sending a first link switching notification message to a data receive end, wherein the first link switching notification message comprises information indicating that the physical link used by the transmission path is switched from the first physical link group to the second physical link group;
• and continuing transmitting the data through a transmission path that uses the second physical link group.