RESELECTION SYSTEM FOR BEARER BINDING AND EVENT REPORTING FUNCTION AND METHOD THEREOF

摘要

A reselection method for bearer binding and event reporting function (BBERF) is provided by the present invention, which enables the deferred association of a policy and charging control session in a roaming scenario. During the process of the BBERF reselection, by establishing a new subsession of an S9 session between the visited policy and charging rule function (PCRF) and the home PCRF and associating the subsession with the Gxx session and the corresponding Gx session established between the target BBERF and the visited PCRF, the present invention enables the deferred association of the policy and charging control session in the scenarios of the home routed and local grooming.