Route calculation method, device, and system

A system for determining a service transmission path, the system comprising:

• at least one route calculation device;
• the at least one route calculation device comprises:
• a receiving module, configured to receive a service request message, and, before receiving the service request message, further configured to receive second bearing capability information sent by another device;
• and
• a calculation module, configured to determine a transmission path of a service based on the service request message and first bearing capability information from a plurality of devices corresponding to each link along the transmission path, wherein the first bearing capability information is used to indicate an actual bearing capability of the respective link on the transmission path and comprises an actual slot width of at least one link on the transmission path, the actual slot width corresponding to channel attenuation of the at least one link, wherein the second bearing capability information identifies an actual bearing capability of at least one of the links on the transmission path, and wherein the second bearing capability information is a subset of the first bearing capability information and the first bearing capability information includes the second bearing capability information.

A non-transitory computer-readable storage medium, wherein the computer-readable storage medium stores a computer program or instructions, and when the program or instructions are run, a device is driven to perform the route calculation method, wherein the method comprises:

• receiving, by a first device, a service request message, wherein the service request message is used to request the first device to determine a transmission path that bears a service requested by the service request message to be established;
• before the first device receives the service request message, receiving, by the first device, second bearing capability information sent by another device;
• and
• determining, by the first device, the transmission path based on the service request message and first bearing capability information from a plurality of devices corresponding to each link along the transmission path, wherein the first bearing capability information is used to indicate an actual bearing capability of the respective link on the transmission path and comprises an actual slot width of at least one link on the transmission path, the actual slot width corresponding to channel attenuation of the at least one link, wherein the second bearing capability information identifies an actual bearing capability of at least one of the links on the transmission path, and wherein the second bearing capability information is a subset of the first bearing capability information and the first bearing capability information includes the second bearing capability information.