An edge computing entity manages an edge computing system. The edge computing entity has processors coupled to a memory, which, alone or in combination, are configured to execute a method. The method includes obtaining topology information of the edge computing system; and exposing the topology information to a network exposure function or a policy control function of a third generation partnership project (3GPP) system. The topology information includes a weight of each of a plurality of edge data centers in the edge computing system. The edge computing system belongs to a non-3GPP system.