Method and device for service restoration after PCRF (Policy and Charging Rules Function) fault

Abstract

The invention discloses a method and a device for service restoration after a PCRF (Policy and Charging Rules Function) fault, and relates to the technical field of information. According to the method and the device for service restoration after the PCRF fault, performance consumption of a PCRF network element can be reduced. The method comprises the steps of when a P-CSCF network element receives a VoLTE service request sent from a user terminal, firstly inquiring a currently registered PCRF network element of the user terminal and judging whether the PCRF network element is in fault by the P-CSCF network element; if the PCRF network element is in fault, sending a notification message to an HSS through an S-CSCF network element, wherein the notification message carries a disaster recovery identifier, and the notification message is used for notifying the S-CSCF network element and the HSS that the PCRF network element is in fault; then sending an IDR message to an MME by the HSS, wherein the IDR message is used for indicating the MME to send an indication message for load release to the user terminal; and finally, when the user terminal receives the indication message for load release sent from the MME, registering a new PCRF network element again by the user terminal. The method and the device are applicable for service restoration after the PCRF fault.

Description

technical field [0001] The invention relates to the field of information technology, in particular to a method and device for service recovery after a PCRF failure. Background technique [0002] With the development of information technology, the VoLTE service also develops. Among them, the Policy and Charging Rules Function Unit (English full name: Policy and ChargingRulesFunction, English abbreviation: PCRF) is a key network element in the VoLTE service, and is mainly responsible for policy control. When a user initiates a service, the core network needs to obtain the current user's service type policy from the PCRF to implement subsequent processing of the VoLTE voice service. Among them, if the PCRF fails, the establishment of the VoLTE voice dedicated bearer will not be completed, and the voice services of all calling users and called users will fail, seriously affecting the user's service experience. [0003] At present, there is a method and device for service recove...

AI Technical Summary

Problems solved by technology

However, when the service is restored through the standby PCRF network element, there is no user-owned session information in the standby PCRF network element. To achieve service recovery, the active PCRF network element and the standby PCRF network element need to synchronize all user sessions in real time. Information, that is, when the data related to the VoLTE session is updated, the master and backup PCRF net

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