METHOD, ROUTING AGENT NETWORK ELEMENT, AND SYSTEM FOR IMPLEMETING ADDRESSING AMONG DIFFERENT NETWORKS

摘要

Embodiments of the present invention disclose a method, a routing agent network element, and a system relating to the communication technology field for implementing addressing among different networks, improving the security of an addressing process among different networks. The method for implementing addressing among different networks includes: receiving a Diameter request message carrying a local IP address of a terminal and/or a network identity of a second network from a policy control node of a first network; selecting a routing agent network element of the second network according to the local IP address of the terminal and/or the network identity of the second network; returning network element information about the routing agent network element of the second network to the policy control node of the first network; or obtaining node information about the policy control node of the second network from the routing agent network element of the second network.