SESSION BINDING METHOD, DEVICE AND SYSTEM IN ROAMING SCENARIO

摘要

Proposed are a session binding method, device and system in a roaming scenario. The method specifically comprises: receiving, by a home network node, a first session message sent by a visited network node, wherein the first session message carries a user identifier; receiving a home second session message, wherein the second session message carries a public network IP address of a user and a private network IP address of the user; according to the public network IP address of the user and the private network IP address of the user which are carried in the second session message, acquiring a user identifier corresponding to a second session from the visited network node; and when the user identifier corresponding to a first session is the same as the user identifier corresponding to the second session, binding the first session and the second session. The present invention realizes that the binding of a visited session and a home session can be effectively completed based on the user identifier without exposing a visited network topology structure.