Resource allocation method and system for instant or advanced reservation request

The invention belongs to the technical field of network resource allocation, and particularly relates to a resource allocation method and system for an instant or advanced reservation request, and the method comprises the following steps: constructing and initializing a cloud edge collaborative elastic optical network, and generating a group of connection requests; establishing a candidate path of the connection request, constructing a two-dimensional resource state model according to the required frequency spectrum slot number of the candidate path, and evaluating the link resource state of the candidate path to obtain the priority of the candidate path; and classifying the connection requests into instant reservation connection requests and advanced reservation connection requests, selecting candidate paths for different types of connection requests to allocate spectrum resources according to the sequence of the priorities, and releasing and updating the spectrum resources of the candidate paths and the com