The application relates to the technical field of mobile communication, and discloses an
adaptation method of an application function (AF) in a 5GC
system broadcast service, which comprises the following steps: a multi-area PCF environment is constructed, each PCF stores user online information through a corresponding CDF, and each PCF is connected with a
data center (DC); an application function (AF) is connected with a plurality of PCFs through different network paths, and a
heartbeat detection mechanism is constructed with a main PCF; in a normal
service process, the application function (AF) initiates an
authorization and
authentication request to the main PCF through a main link, the main PCF generates a PCC rule according to strategy information and delivers the PCC rule to an SMF,
user information is stored in a local CDF and is synchronized to the
data center (DC); when a fault occurs between the application function (AF) and the main PCF, the application function (AF) is switched to a standby communication to recover the service. According to the method, the
system can be automatically and quickly switched to a standby path, and the fault risk of a single Rx connection is eliminated.