The invention relates to a method for implementing cross-domain
virtual network mapping, and belongs to the technical field of communications. According to the invention, after a user generates a business request, a
service provider initiates construction of a multi-domain
virtual network request, and an appropriate node and path are selected from an underlying cross-domain fusion network to bearresource demands of the multi-domain
virtual network request. According to the invention, the virtual network request and the local and global topological attribute of a node in an underlying physicalnetwork are analyzed, the network local resource attribute is combined, a node multi-attribute evaluation model is established by means of an improved
principal component analysis method, the priority of the node in the mapping process is measured based on the evaluation model and by means of the technique for order of preference by similarity to
ideal solution, pressure distribution of an underlying link load is analyzed at the same time, a well-resourced bearing path is selected for a
virtual link, an underlying multi-domain network resource can be better utilized, the construction successrate of the multi-domain virtual network request is increased, the ratio of network income to cost is increased, the
resource distribution equilibrium is effectively improved, and
network mapping timedelay can be reduced.