DEVICE, SYSTEM, AND RESOURCE ALLOCATION METHOD

This application proposes a method, which includes: determining resource configuration information of a first application based on a first request sent by a client and global resource information of the ADN, where the first request includes information used to determine a resource requirement of the first application, the resource configuration information of the first application includes resource configuration of the first application in at least one subdomain in the ADN, and the global resource information includes resource utilization information of the first application in each subdomain and available resource information in each subdomain; and sending the resource configuration information of the first application to the client, where the resource configuration information of the first application is used by the client to request a C plane controller of the at least one subdomain to configure a resource of the first application in a subdomain to which the C plane controller belongs.