METHODS AND APPARATUS FOR RESOLVING DATA INCONSISTENCIES IN AN IMS NETWORK

摘要

A Serving Call Session Control Function, S-CSCF, within an IP Multimedia Subsystem, IMS, core network. Notifications are sent to a Home Subscriber Server, HSS, of the IMS core network, indicating IMS registration state changes of users. Delivery failure of a notification of an IMS registration state change sent to a HSS and relating to a given user is detected. An association between an identifier of the given user and an indication of said delivery failure is stored in order to indicate a loss of IMS registration state synchronization for the given user between the S-CSCF and the HSS. An event requiring an IMS registration state change for the user is detected. A determination is made that a delivery failure indication associated with the user's identifier is stored. The HSS is notified indicating the required IMS registration state change and of a previous loss of the IMS registration state synchronization.

主权项

1. An apparatus configured to operate as a Serving Call Session Control Function, S-CSCF, within an IP Multimedia Subsystem, IMS, core network, the apparatus comprising:
an interface for sending to a Home Subscriber Server, HSS, of the IMS core network, notifications indicating IMS registration state changes of users; a detector for detecting delivery failure of a notification of an IMS registration state change sent to a HSS and relating to a given user; a memory and memory controller for storing in said memory an association between an identifier of said given user and an indication of said delivery failure in order to indicate a loss of IMS registration state synchronization for said given user between the S-CSCF and the HSS; and an event handler for:
detecting an event relating to said given user, the event requiring an IMS registration state change for the user;determining that said memory currently stores a delivery failure indication associated with the user's identifier; andcausing said interface to send a further notification to the HSS, the further notification including both an indication of the required IMS registration state change and an indication of a previous loss of IMS registration state synchronization for the user between the S-CSCF and the HSS.